Pioneer Deh p2550

PIONEER CORPORATION 4-1, Meguro 1-Chome, Meguro-ku, Tokyo 153-8654, Japan PIONEER ELECTRONICS (USA) INC. P.O.Box 1760, Long Beach, CA 90801-1760 U.S.A.PIONEER EUROPE NV Haven 1087 Keetberglaan 1, 9120 Melsele, Belgium PIONEER ELECTRONICS ASIACENTRE PTE.LTD. 253 Alexandra Road, #04-01, Singapore 159936

C PIONEER CORPORATION 2002 K-ZZA. OCT. 2002 Printed in Japan

ORDER NO.

CRT2983

MULTI-CD CONTROL HIGH POWER CD PLAYER WITH FM/AM TUNER

DEH-P2550XM/ES, XN/ES

ServiceManual

DEH-P2550/XM/ES

- This service manual should be used together with the following manual(s):Model No. Order No. Mech. Module Remarks

CX-3026 CRT2944 S10 CD Mech. Module:Circuit Description, Mech.Description, Disassembly

For details, refer to "Important symbols for good services".

2

1 2 3 4

1 2 3 4

F

E

D

C

B

A

DEH-P2550/XM/ES

SAFETY INFORMATION

[ Important symbols for good services ]In this manual, the symbols shown-below indicate that adjustments, settings or cleaning should be made securely.When you find the procedures bearing any of the symbols, be sure to fulfill them:

2. Adjustments

To keep the original performances of the product, optimum adjustments or specification confirmation is indispensable. In accordance with the procedures or instructions described in this manual, adjustments should be performed.

3. Cleaning

For optical pickups, tape-deck heads, lenses and mirrors used in projection monitors, and other parts requiring cleaning,proper cleaning should be performed to restore their performances.

5. Lubricants, glues, and replacement partsAppropriately applying grease or glue can maintain the product performances. But improper lubrication or applying glue may lead to failures or troubles in the product. By following the instructions in this manual, be sure to apply theprescribed grease or glue to proper portions by the appropriate amount.For replacement parts or tools, the prescribed ones should be used.

4. Shipping mode and shipping screws

To protect the product from damages or failures that may be caused during transit, the shipping mode should be set orthe shipping screws should be installed before shipping out in accordance with this manual, if necessary.

1. Product safety

You should conform to the regulations governing the product (safety, radio and noise, and other regulations), and should keep the safety during servicing by following the safety instructions described in this manual.

This service manual is intended for qualified service technicians; it is not meant for the casual do-it-yourselfer.Qualified technicians have the necessary test equipment and tools, and have been trained to properly and safely repaircomplex products such as those covered by this manual.Improperly performed repairs can adversely affect the safety and reliability of the product and may void the warranty.If you are not qualified to perform the repair of this product properly and safely, you should not risk trying to do soand refer the repair to a qualified service technician.

3

5 6 7 8

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5 6 7 8DEH-P2550/XM/ES

- CD Player Service Precautions

1. Before disassembling the unit, be sure to turn off the

power. Unplugging and plugging the connectors dur-

ing power-on mode may damage the ICs inside the

unit.

2. To protect the pickup unit from electrostatic dis-

charge during serviving, take an appropriate treat-

ment(shorting-solder) by referring to "the DISAS-

SEMBLY" on page 41.

3. After replacing the pickup unit, be sure to check the

grating.(See p.38.)

CONTENTS

SAFETY INFORMATION ............................................................................................................................................2

1. SPECIFICATIONS .......................................................................................................................................................4

2. EXPLODED VIEWS AND PARTS LIST.......................................................................................................................5

2.1 PACKING...............................................................................................................................................................5

2.2 EXTERIOR.............................................................................................................................................................6

2.3 CD MECHANISM MODULE .................................................................................................................................8

3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM...................................................................................................10

3.1 BLOCK DIAGRAM ..............................................................................................................................................10

3.2 OVERALL CONNECTION DIAGRAM(GUIDE PAGE) ........................................................................................12

3.3 KEYBOARD UNIT ...............................................................................................................................................18

3.4 CD MECHANISM MODULE ...............................................................................................................................20

4. PCB CONNECTION DIAGRAM................................................................................................................................24

4.1 TUNER AMP UNIT .............................................................................................................................................24

4.2 PANEL UNIT .......................................................................................................................................................28

4.3 KEYBOARD UNIT ...............................................................................................................................................29

4.4 CD MECHANISM MODULE ...............................................................................................................................30

5. ELECTRICAL PARTS LIST ........................................................................................................................................32

6. ADJUSTMENT .........................................................................................................................................................36

6.1 CD ADJUSTMENT .............................................................................................................................................36

6.2 CHECKING THE GRATING AFTER CHANGING THE PICKUP UNIT................................................................38

6.3 ERROR MODE ....................................................................................................................................................40

7. GENERAL INFORMATION .......................................................................................................................................41

7.1 DIAGNOSIS ........................................................................................................................................................41

7.1.1 DISASSEMBLY ..............................................................................................................................................41

7.1.2 CONNECTOR FUNCTION DESCRIPTION....................................................................................................43

7.2 PARTS .................................................................................................................................................................44

7.2.1 IC ....................................................................................................................................................................44

7.2.2 DISPLAY.........................................................................................................................................................52

7.3 OPERATIONAL FLOW CHART...........................................................................................................................53

7.4 CLEANING..........................................................................................................................................................54

8. OPERATIONS ...........................................................................................................................................................55

1. SPECIFICATIONS

4

1 2 3 4

1 2 3 4

F

E

D

C

B

A

DEH-P2550/XM/ES

Backup current5 mA or less

5

5 6 7 8

F

E

D

C

B

A

5 6 7 8DEH-P2550/XM/ES

1 Cord Assy CDE70602 Accessory Assy CEA34393 Spring CBH16504 Screw Assy CEA3437

5-1 Owner’s Manual CRD3690

5-2 Owner’s Manual CRD36915-3 Installation Manual CRD3692

6 Screw CBA1002* 7 Polyethylene Bag CEG-127

8 Screw CRZ50P090FTC

9 Screw TRZ50P080FTC* 10 Polyethylene Bag CEG-158

11 Handle CNC539512 Case Assy CXB3520)13 Remote Control Unit CXC1265

14 Bush CNV393015 Polyethylene Bag CEG1173

* 16 Battery CEX106517 Carton(DEH-P2550/XM/ES) CHG4961

Carton(DEH-P2550/XN/ES) CHG4975

18 Contain Box(DEH-P2550/XM/ES) CHL4975Contain Box(DEH-P2550/XN/ES) CHL4961

19 Protector CHP266320 Protector CHP2664

Mark No. Description Part No. Mark No. Description Part No.

- PACKING SECTION PARTS LIST

NOTE:

- Parts marked by “*” are generally unavailable because they are not in our Master Spare Parts List.

- Screws adjacent to ∇ mark on the product are used for disassembly.

- For the applying amount of lubricants or glue, follow the instructions in this manual.

(In the case of no amount instructions, apply as you think it appropriate.)

2. EXPLODED VIEWS AND PARTS LIST

2.1 PACKING

- Owner's Manual, Installation ManualModel Part No. LanguageDEH-P2550/XM/ES CRD3690 English, Spanish, Portuguese(B)DEH-P2550/XN/ES CRD3691 Traditional Chinese, Arabic

CRD3692 English, Spanish, Portuguese(B), Traditional Chinese, Arabic

6

1 2 3 4

1 2 3 4

F

E

D

C

B

A

DEH-P2550/XM/ES

2.2 EXTERIOR

7

5 6 7 8

F

E

D

C

B

A

5 6 7 8DEH-P2550/XM/ES

1 Remote Control Unit CXC12652 Cover CNS70683 Screw ISS26P055FTC4 Screw BMZ30P040FZK5 Screw BSZ26P060FTC

6 Screw BSZ30P060FTC7 Screw BSZ30P200FTC8 Cord Assy CDE70609 Cable CDE7188

10 CD Mechanism Module(S10) CXK5600

11 Case CNB279312 Earth Plate CNC891513 Cushion CNM487014 Insulator CNM793515 Insulator CNM8174

16 Panel CNS693517 Tuner Amp Unit CWM861918 Screw ASZ26P060FTC19 Screw BPZ26P080FTC20 Screw BSZ26P160FTC

21 Fuse(10A) CEK120822 FM/AM Tuner Unit CWE164623 Holder CND105424 Pin Jack(CN351) CKB105925 Plug(CN981) CKM1376

26 Connector(CN101) CKS340827 Plug(CN831) CKS353728 Connector(CN721) CKS383529 Antenna Jack(CN401) CKX105630 Holder CND1237

31 Holder CND135232 Insulator CNM824533 Heat Sink CNR166834 Terminal(CN402) VNF108435 Holder Unit(DEH-P2550/XM/ES) CXB6681

Holder(DEH-P2550/XN/ES) CNC8659

36 Chassis Unit CXB952837 Button(EJECT) CAC775238 Screw(M2x2) CBA117639 Washer CBF103840 Spring CBH2650

41 Spring CBH265142 Spring CBH265243 Spring CBH265344 Spring CBL151245 Holder CND1254

46 Cover CNM685447 Panel CNS724548 Gear CNV599749 Pin CNV648650 Lighting Conductor CNV6487

51 Arm CNV740052 Arm CNV740153 Arm CNV740254 Arm CNV740355 Panel Unit CWM8758

56 Socket(CN1950) CKS355057 Connector(CN1951) CKS446258 Holder Unit CXB950159 Holder Unit CXB950260 Damper Unit CXB9503

61 Service Panel Unit CXX169162 Screw IMS20P045FZK63 Detach Grille Assy CXB960464 Screw BPZ20P100FZK65 Button(DISP) CAC7779

66 Button(PAUSE) CAC778067 Button(AUDIO) CAC778168 Button(OPEN) CAC778269 Button(VOLUME) CAC781070 Button(SELECT) CAC7812

71 Button(SRC) CAC778572 Button(FUNC) CAC778673 Button(1-6) CAC778774 Button(CLK, EQ) CAC780875 Spring CBH2630

76 Cover CNS726977 Lighting Conductor CNV742178 Rubber CNV742279 Keyboard Unit CWM863580 LCD(LCD1901) CAW1759

81 Connector(CN1901) CKS452482 Holder CNC975783 Sheet CNM764784 Cushion CNM809285 Connector CNV6440

86 Lighting Conductor CNV749587 Grille Unit CXB963288 Transistor(Q752, 901, 911) 2SD237589 IC(IC301) PAL007A90 IC(IC1902) TSOP4840SB1

91 •••••92 •••••93 Choke Coil(L981) CTH1280

- EXTERIOR SECTION PARTS LIST


8

1 2 3 4

1 2 3 4

F

E

D

C

B

A

DEH-P2550/XM/ES

1GEM10242GEM10453GEM1035

1

1

1

1

1

1

1

1

2

2

2

2

1

1

1

1

1

2

2

1

3

2.3 CD MECHANISM MODULE

5 6 7 8

F

E

D

C

B

A

5 6 7 8DEH-P2550/XM/ES 9


1 CD Core Unit(S10) CWX27082 Connector(CN101) CKS41823 Connector(CN701) CKS41884 Screw BMZ20P035FTC5 Screw BSZ20P040FTC

6 Screw(M2x4) CBA13627 Screw(M2x3) CBA15118 Screw(M2x3) CBA15279 Washer CBF1037

10 Washer CBF1038

11 Washer CBF106012 Spring CBH239013 Spring CBH260614 Spring CBH260715 Spring CBH2608

16 Spring CBH260917 Spring CBH261018 Spring CBH261119 Spring CBH261220 Spring CBH2613



31 Spring CBH2688* 32 Spring CBL1614

33 Shaft CLA384534 Frame CNC996235 Frame CNC9963

36 Bracket CNC996637 Bracket CNC996738 Arm CNC996839 Arm CNC997340 Lever CNC9983

41 Lever CNC998442 Sheet CNM813443 Collar CNV690644 Guide CNV692545 Arm CNV7198

46 Rack CNV719947 Holder CNV720148 Holder CNV720249 Arm CNV720350 Gear CNV7207

51 Gear CNV720852 Gear CNV720953 Gear CNV721054 Gear CNV721155 Gear CNV7212

56 Rack CNV721457 Arm CNV721558 Arm CNV721659 Guide CNV721760 Roller CNV7218

61 Gear CNV721962 Arm CNV722163 Arm CNV722064 Arm CNV722265 Damper CNV7313

66 Damper CNV731467 Arm CNV734168 Arm CNV734269 Guide CNV736070 Guide CNV7361

71 Holder CNV743772 Arm CNV744473 Gear CNV759574 Damper CNV761875 Motor Unit(M1) CXB6007

76 Chassis Unit CXB872877 Screw Unit CXB872978 Gear Unit CXB873179 Arm Unit CXB873280 Arm Unit CXB8735

81 Arm Unit CXB885282 Motor Unit(M2) CXB893383 Bracket CNC998584 Screw JFZ20P020FTC85 Screw(M2x5) EBA1028

86 Screw JFZ20P020FTC87 Screw JGZ17P022FTC88 Washer YE15FTC89 Washer YE20FTC90 Pickup Unit(Service)(P10) CXX1641

91 Screw IMS26P030FMC

- CD MECHANISM MODULE SECTION PARTS LIST

10

1 2 3 4

1 2 3 4

F

E

D

C

B

A

DEH-P2550/XM/ES

CN701CN101Q101

M

LASERDIODE

MONITORDIODE

CLAMP

HOME

X201

12EJ 8EJ DSCSNS

FOCUS ACT.

SPINDLEMOTOR

MCARRIAGEMOTOR

LOADING/

TRACKING ACT.

LD+

MD

FOPTOP

14

5

41

PICKUP UNIT(SERVICE)(P10)

HOLOGRAM UNIT

IC 301BA5996FP

IC 201UPD63712GC

IC 701

NJM2391DL1-33

3.3V REGULATOR

SERVO CONTROL,

DSP,LPF, DAC

ACT,MOTORDRIVER

1VD

VD

3R3V

7CONT

11CLMP

5LOEJ

6DSCSNS

8LOUT

TOP

FOP

16 SOP15 SOM17 LCOM18 LCOP 22

1

LOEJ

23

20LOUT

XTAL

xtal

24

9CONT

12 FOPFD, TD, SD, MD

AC, F, E, BD

1 LD

2 PD

42 LIMIT

3

13 TOP

D CD CORE UNIT(S10)D

2

16SO12 XSI

ASENBO

37mute

X1

X2

3

PEE100

41

5

6

4

71

86

85

24

SYSTEM CONTROLLER

IC 601(2/2)PE5341C

CN4011

2

BUS-

BUS+

BUS+L

BUS-L

TX

RX

IPPW

sw

vd

d

BU

VDD

BU

CN721

Q751

Q752

TUNER AMP UNIT

16X601

15

EVST,EVCK,EVDT

TUN L

BUS+L

BUS-L

CD L

96

DP

DT

95

KY

DT

21SYSPW

ejectin8

20

ILM

PW

S

DETACH SENSE

90

ds

en

s

A

5

81

7

CN101

11

BUZZER

20

15

11

17

16

14

21

IC 101HA12187FP

IP-BUS DRIVER

1

2

8

6

5 TX

RX

IPPW

BU

Q101

Q102

CDLOEJ59

CONT61

DSCSNS79

XTALEN63

TUN 3.3V

SYS 8.4V

VDD

64

VD

CO

NT

CLMP

TC7SET08FU

IC 722

2 4XSI

666

80 VDSENS

VDSENS

ANTENNA

FLPILM9

Q60183AVREF

22adpw

V

FMRF

ANT adjRF adj

FM ANT

T51 CF52CF51

RFG

ND

OS

CG

ND

DG

ND

AU

DIO

GN

D

NC

VC

C

VD

D_3

.3

3.3V 2.5VIC 4

3.3V 2.5V

←

IC 22.5V

WC

CE

2

RO

M_V

DD SL DI

CK

CE

1

NC

DO

NC

NC

NC

NC

7 6 13 5 10 9 8 11 14 18 19 20 21

1

3

2 12 15 22 16 4 17

IC 13.3V

AM ANT FMRFATT

LPFOSC

IC 3 EEPROM5.0V

IC 55V 3.3V←

ATT

MIXER, IF AMP DET, FM MPX

24

23

Rch

Lch

FM/AM TUNER UNIT

3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM

3.1 BLOCK DIAGRAM

11

5 6 7 8

F

E

D

C

B

A

5 6 7 8DEH-P2550/XM/ES

11

1

bsens

asens

VDD

BU

92

93

10FL

11RL

ILB

SWVDD

ILB

SWDVDD

23

21

3

5

FL-

FL+

RL-

RL+

ACC

IN2-L3

IN4+L5

IN4-L6

IN3-L4

FLIN14

RLIN12

22 4

RESET

POWER AMP

IC 601(1/2)PE5341C

IC 131PML003AM

IC 651BD4834G

IC 301PAL007A

re

se

t

VDD

Q901

Q931

SYSPW

ELECTRONIC VOLUME/SOURCE SELECTOR

BU

VDD

STBYMUTE

IC 1901PD6340A

LCD DRIVER/KEY CONTROLLER

KEY MATRIX

9

11

KEY DATA

VD

D

55

CN1901Q961

Q962

Q971

KEYBOARD UNIT

X601

2

VST,EVCK,EVDT

TUN L

+L

-L

DPDT 3

5

DPDT

KYDT

SYS 8.4V BU

Q912

Q913

BU

Q301MUTE

RL RLQ351

7

2

11

14

7

2

11

14

CN1950CN1951

KYDT

4

2

10

8

IC 1902TSOP4840SB1

REMOTE CONTROL SENSOR

OPT IN31

17

RFM

18

20

DPDT

KTDT LCD

PANEL UNIT

MUTE

RL

S801

DETACH SENSE

SYSTEM CONTROLLER

25

B.REMOTE

FL-FL+RL-RL+

VDD REGULATOR

BACKUP SENSE

ACC SENSE

SYS 8.4V REGULATOR

14

8

6

5

7

16

11

14

8

6

5

7

16

11

15 15

B C

CN981

Q502

BU

CN351

BACK UP

GND

FUSE

10A

ACC

B.REM

SL

TUNPCE2

TUNPCE1

TUNPDI

TUNPDO

74

32

99

94

98

TUNPCK97

CE2

CE1

4

BA033FP

IC 921

13SYS 8.4VTUN 3.3V

TUNER 3.3V REGULATOR

Q911

DO

DI

CK

Q902

DALMON10

BU

20

Q501

VLC

D

11

810 10 5BL+B

PRE OUT

CN831

8 8

S1970

EJECT9 9

BU 5

6

5

6Q831

Q601

VDD

12

1 2 3 4

1 2 3 4

F

E

D

C

B

A

DEH-P2550/XM/ES

PE5

R4721

0R0

R9101

0R0

R9403

0R0

B PANELUNIT

CCN1901

D CN701

FM/A

M T

UN

ER

UN

IT

IP-BUS

DE

TA

CH

SE

NS

E S

W

EJECT

FM(30%):-30.0dBsAM(30%):-30.0dBs

IP-BUS:+2.2dBs

CD:0dBs

FM:-31.0dBsAM:-31.0dBs

IP-BUS:+2.2dBsCD:0dBs

3.2 OVERALL CONNECTION DIAGRAM(GUIDE PAGE)

Note: When ordering service parts, be sure to refer to “EXPLODED VIEWS AND PARTS LIST” or “ELECTRICAL

PARTS LIST”.

A-a A-b

A-aA-a A-b A-b

A-b A-b A-a A-a

Large sizeSCH diagram

Guide page

Detailed page

A B

A-a

13

5 6 7 8

F

E

D

C

B

A

5 6 7 8DEH-P2550/XM/ES

5341C

REARR CH

REARL CH

A TUNER AMP UNIT

BACKUP

GND

RL—

RL+

FL—

FL+

B.REM

ACC

RR—

RR+

FR—

FR+

600µH

Decimal points for resistorand capacitor fixed valuesare expressed as :2.2 2R20.022 R022

← ←

Symbol indicates a resistor.No differentiation is made between chip resistors anddiscrete resistors.

NOTE :

Symbol indicates a capacitor.No differentiation is made between chip capacitors anddiscrete capacitors.

The > mark found on some component parts indicatesthe importance of the safety factor of the part.Therefore, when replacing, be sure to use parts ofidentical designation.

FUSE10A

CEK1208

>


IP-BUS:+10.3dBsCD:+10.1dBs


IP-BUS:+9.54dBsCD:+9.34dBs

FM:+30dBsAM:+20dBs

IP-BUS:+36dBsCD:+36dBs

A-b

A

14

1 2 3 4

1 2 3 4

F

E

D

C

B

A

DEH-P2550/XM/ES

A-a

A-b

A-a

A-a

A-b 1 2

R47

21

0R0

R91

01

0R0

DC

N70

1

IP-B

US

IP-B

US

:+2.

2dB

s

CD

:0d

Bs

FM:-

31.0

dB

sA

M:-

31.0

dB

sIP

-BU

S:+

2.2d

Bs

CD

:0d

Bs

15

5 6 7 8

F

E

D

C

B

A

5 6 7 8DEH-P2550/XM/ES

A-a

A-b

A-a

A-b

A-a B

3 4

PE

5341

C

R94

03

0R0

BPA

NE

LU

NIT

CC

N19

01

FM/AM TUNER UNIT

DETACH SENSE SW

EJE

CT

FM(3

0%):

-30.

0dB

sA

M(3

0%):

-30.

0dB

s

16

1 2 3 4

1 2 3 4

F

E

D

C

B

A

DEH-P2550/XM/ES

A-a

A-b

A-b 1 2

RE

AR

R C

H

RE

AR

L C

H

AT

UN

ER

AM

P U

NIT

FM:-

5.9d

Bs

AM

:-5.

9dB

sIP

-BU

S:+

10.3

dB

sC

D:+

10.1

dB

s

FM:-

6.66

dB

sA

M:-

6.66

dB

sIP

-BU

S:+

9.54

dB

sC

D:+

9.34

dB

s

17

5 6 7 8

F

E

D

C

B

A

5 6 7 8DEH-P2550/XM/ES

A-a

A-b

A-b3 4

1C

BA

CK G

RL—

RL+

FL— FL+

B.R

EA

RR

—

RR

+

FR

—

FR

+

600µ

H

Dec

imal

po

ints

fo

r re

sist

or

and

cap

acit

or

fixe

d v

alu

esar

e ex

pre

ssed

as

:2.

2

2R2

0.02

2

R02

2

←

←

Sym

bo

l in

dic

ates

a r

esis

tor.

No

dif

fere

nti

atio

n is

mad

e b

etw

een

ch

ip r

esis

tors

an

dd

iscr

ete

resi

sto

rs.

NO

TE

: Sym

bo

l in

dic

ates

a c

apac

ito

r.N

o d

iffe

ren

tiat

ion

is m

ade

bet

wee

n c

hip

cap

acit

ors

an

dd

iscr

ete

cap

acit

ors

.

Th

e >

mar

k fo

un

d o

n s

om

e co

mp

on

ent

par

ts in

dic

ates

the

imp

ort

ance

of

the

safe

ty f

acto

r o

f th

e p

art.

Th

eref

ore

, wh

en r

epla

cin

g, b

e su

re t

o u

se p

arts

of

iden

tica

l des

ign

atio

n.

FUSE

10A

CEK1

208

>

FM:+

30d

Bs

AM

:+20

dB

sIP

-BU

S:+

36d

Bs

CD

:+36

dB

s

18

1 2 3 4

1 2 3 4

F

E

D

C

B

A

DEH-P2550/XM/ES

3.3 KEYBOARD UNIT

C

C KEYBOARD UNIT

CA

W17

59

19

5 6 7 8

F

E

D

C

B

A

5 6 7 8DEH-P2550/XM/ES

C

BC

N19

51

150

CE

L165

1

SM

L-31

0PT

x12

CE

L165

1

150

150

150

20

1 2 3 4

1 2 3 4

F

E

D

C

B

A

DEH-P2550/XM/ES

D

M1 CXB6007

M2 CXB8933

LOADING/CARRIAGEMOTOR

SPINDLE MOTOR

MOTOR DRIVER

3.3VREGULATOR

Pickup Unit(Service)(P10)

F

T

F

T

F

T

T

F F

FTT

F

TS

C

FFT

T

SS

C

C

S

S

C

C

TTFFF

FTT

1

7

8

36

5

@

9

0

!

#


21

5 6 7 8

F

E

D

C

B

A

5 6 7 8DEH-P2550/XM/ES

D

SWITCHES:CD CORE UNIT S901 : HOME SWITCH.....ON-OFF S902 : CLAMP SWITCH....ON-OFF S903 : DSCSNS SWITCH....ON-OFF S904 : 12EJ SWITCH....ON-OFF S905 : 8EJ SWITCH....ON-OFFThe underlined indicates the switch position.

RF AMP / SERVO / DSPDAC / LPF

D CD CORE UNIT (S10)

A CN???

F

T

C

S

SIGNAL LINEFOCUS SERVO LINE

TRACKING SERVO LINE

CARRIAGE SERVO LINE

SPINDLE SERVO LINE

S C T F

S

C

3

5

@

$ %

4

2

9

CN721

22

1 2 3 4

1 2 3 4

F

E

D

C

B

A

DEH-P2550/XM/ES

- Waveforms Note : 1. The encircled numbers denote measuring points in the circuit diagram.2. Reference voltage REFO1(1.65V)

1 DSCSNS2 CLCONT3 LOEJ4 VD

5V/div5V/div5V/div10V/div

500ms/div

When loading a 12cm CD

Ref.:GND

Mode:Normal

5 SIN6 CIN7 TIN

1V/div500mV/div500mV/div

2s/div

When setting up after loading a 12cm CD-DA disc

Ref.:REFO

Mode:Normal

1 DSCSNS2 CLCONT3 LOEJ4 VD


500ms/div

When loading an 8cm CD

Ref.:GND

Mode:Normal

@ MDX5 SIN

500mV/div1V/div

5ms/div

Spindle waveform during "Play"

Ref.:REFO

Mode:Normal

# RFAGC 500mV/div 0.5µs/div

Ref.:REFO

Mode:Normal

@ MDX5 SIN

500mV/div1V/div

5µs/div

Spindle waveform during "Play"(Magnified) RF eye pattern

Ref.:REFO

Mode:Normal

8 FIN! FE

500mV/div500mV/div

200ms/div

Focus Search

Ref.:REFO

Mode:TEST

# RFAGC0 TE7 TIN


500µs/div

Ref.:REFO

Mode:TEST

0 TE# RFAGC

500mV/div500mV/div

2ms/div

When "Tracking Open" 1 Track Jump

Ref.:REFO

Mode:TEST

8 FIN9 RFOK5 SIN

200mV/div2V/div2V/div

500ms/div

When setting up "Source On"(12cm CD-DA) During "Play"(CD-DA)

Ref.:REFO

Mode:Normal

! FE8 FIN0 TE7 TIN

500mV/div500mV/div500mV/div500mV/div

20ms/div

Ref.:REFO

Mode:Normal

0 TE! FE

500mV/div500mV/div

200ms/div

When setting up "Source On"

Ref.:REFO

Mode:Normal

23

5 6 7 8

F

E

D

C

B

A

5 6 7 8DEH-P2550/XM/ES

# RFAGC0 TE7 TIN


500ms/div

32 Track Jump

Ref.:REFO

Mode:TEST

# RFAGC7 TIN0 TE8 FIN


500µs/div

Ref.:REFO

Mode:Normal

# RFAGC0 TE7 TIN


5ms/div

100(32x3) Track Jump When reproducing black dots(1mm)

Ref.:REFO

Mode:TEST

$ LOUT% ROUT

1V/div1V/div

200µs/div

Analog Audio

Ref.:AGND

Mode:Normal

1 DSCSNS2 CLCONT3 LOEJ

5V/div5V/div5V/div

200ms/div

Ref.:GND

Mode:Normal

1 DSCSNS2 CLCONT3 LOEJ

5V/div5V/div5V/div

200ms/div

When "Eject"(12cm CD) When "Eject"(8cm CD)

Ref.:GND

Mode:Normal

# RFAGC0 TE6 CIN5 SIN

1V/div1V/div500mV/div2V/div

500µs/div

When reproducing scratch(1mm)During inside/outside search(outer circumference → inner circumference)

Ref.:REFO

Mode:Normal



500µs/div

Ref.:REFO

Mode:Normal



5ms/div

When reproducing fingerprint(65µm)

Ref.:REFO

Mode:Normal

24

1 2 3 4

1 2 3 4

F

E

D

C

B

A

DEH-P2550/XM/ES

4. PCB CONNECTION DIAGRAM

4.1 TUNER AMP UNIT

CapacitorConnector

P.C.Board Chip Part

A

A TUNER AMP UNIT

SIDE B

SIDE A

NOTE FOR PCB DIAGRAMS

1.The parts mounted on this PCB include all necessary parts for several destination. For further information for respective destinations, be sure to check with the schematic diagram.2.Viewpoint of PCB diagrams

L981

R9101

R4721

IP-BUS

CORD ASSY

D CN701

WIREDREMOTE

DETACH SENSE

25

5 6 7 8

F

E

D

C

B

A

5 6 7 8DEH-P2550/XM/ES

A

SIDE A

IC,Q

FRONT

R94

05

R94

03

B CN1950

ANTENNA

PRE OUT

FM/A

M T

UN

ER

UN

IT

26

1 2 3 4

1 2 3 4

F

E

D

C

B

A

DEH-P2550/XM/ES

A

A TUNER AMP UNIT

IC,Q

27

5 6 7 8

F

E

D

C

B

A

5 6 7 8DEH-P2550/XM/ES

A

SIDE B

28

1 2 3 4

1 2 3 4

F

E

D

C

B

A

DEH-P2550/XM/ES

B

B PANEL UNIT

B PANEL UNIT

SIDE A

SIDE B

C CN1901

A CN831

EJECT

4.2 PANEL UNIT

29

C

C KEYBOARD UNIT C KEYBOARD UNITSIDE A SIDE B

IC,QIC,Q

B CN1951C

LK

DIS

P

SR

C6

LOU

DB

AN

D/E

SC

FUN

C

PA

US

EA

UD

IO

12

34

5

EQ

↓ ↓

↓ ↓

↓

↓

5 6 7 8

F

E

D

C

B

A

5 6 7 8DEH-P2550/XM/ES

4.3 KEYBOARD UNIT

30

1 2 3 4

1 2 3 4

F

E

D

C

B

A

DEH-P2550/XM/ES


D

D CD CORE UNIT(S10) SIDE A

ACN???

PICKUP UNIT(SERVICE)(P10)

HOME

M1SPINDLE MOTOR

M2LOADING

/CARRIAGE MOTOR

CN721

31

5 6 7 8

F

E

D

C

B

A

5 6 7 8DEH-P2550/XM/ES

D

D CD CORE UNIT(S10) SIDE B

CLAMP

DSCSNS

8EJ 12EJ

32

1 2 3 4

1 2 3 4

F

E

D

C

B

A

DEH-P2550/XM/ES

5. ELECTRICAL PARTS LIST

NOTES:

- Parts whose parts numbers are omitted are subject to being not supplied.

- The part numbers shown below indicate chip components.

Chip Resistor

RS1/_S___J,RS1/__S___J

Chip Capacitor (except for CQS.....)

CKS....., CCS....., CSZS.....

=====Circuit Symbol and No.===Part Name Part No.--- ------ ------------------------------------------ -------------------------

Unit Number : CWM8619Unit Name : Tuner Amp Unit

MISCELLANEOUS

IC 101 IC HA12187FPIC 131 IC PML003AMIC 301 IC PAL007AIC 601 IC PE5341CIC 651 IC BD4834G

IC 722 IC TC7SET08FUIC 921 IC BA033FPQ 101 Transistor 2SA1037KQ 102 Transistor DTC124EKQ 301 Transistor DTC124EK

Q 351 Transistor IMH3AQ 501 Transistor 2SC2412KQ 502 Transistor IMD2AQ 601 Transistor DTA114EKQ 751 Transistor IMD2A

Q 752 Transistor 2SD2375Q 831 Transistor DTC143EKQ 901 Transistor 2SD2375Q 902 Transistor IMD2AQ 911 Transistor 2SD2375

Q 912 Transistor 2SB1238Q 913 Transistor DTC114EKQ 931 Transistor IMX1Q 961 Transistor 2SB1238Q 962 Transistor DTC114EK

Q 971 Transistor 2SA1036KD 501 Diode DAN202UD 502 Diode HZS9L(A2)D 571 Diode MPG06G-6415G50D 572 Diode MPG06G-6415G50

D 751 Diode HZS9L(B1)D 831 Diode DAN202UD 832 Diode DAN202UD 833 Diode DAP202UD 834 Diode DAP202U

D 901 Diode HZS6L(B1)D 902 Diode MPG06G-6415G50D 911 Diode HZS9L(B3)D 921 Diode 1SR154-400D 922 Diode 1SR154-400

D 923 Diode 1SR154-400D 931 Diode HZS7L(C3)D 932 Diode HZS7L(A1)D 981 Diode MPG06G-6415G50D 982 Diode MPG06G-6415G50

ZNR 401 Arrester DSP-201ML 131 Inductor LCTA2R2J2520L 401 Ferri-Inductor LAU4R7KL 402 Inductor LAU1R0KL 404 Inductor LAU1R0K

L 405 Inductor LAU2R2KL 601 Inductor LAU2R2KL 971 Inductor LAU2R2KL 981 Choke Coil 600µH CTH1280X 601 Radiator 12.58291MHz CSS1402

S 831 Switch(DETACH SENSE) CSN1039SP 601 Buzzer CPV1062

Fuse 10A CEK1208FM/AM Tuner Unit CWE1646

RESISTORS

R 101 RS1/16S150JR 102 RS1/16S470JR 103 RS1/16S101JR 104 RS1/16S101JR 105 RS1/16S181J


R 111 RS1/16S222JR 112 RS1/16S103JR 113 RS1/16S332JR 114 RS1/16S562JR 131 RS1/16S0R0J

R 132 RS1/16S0R0JR 133 RAB4C102JR 137 RS1/16S101JR 138 RS1/16S101JR 139 RS1/16S101J

R 140 RS1/16S101JR 141 RS1/16S0R0JR 142 RS1/16S0R0JR 301 RS1/16S153JR 302 RS1/16S103J






A

33

5 6 7 8

F

E

D

C

B

A

5 6 7 8DEH-P2550/XM/ES

R 619 RS1/16S1602DR 620 RS1/16S473JR 621 RS1/16S473JR 622 RS1/16S473JR 623 RS1/16S473J


R 640 RS1/16S0R0JR 651 RS1/16S102JR 652 RS1/16S183JR 713 RS1/16S104JR 716 RS1/16S221J

R 724 RS1/16S104JR 727 RS1/16S0R0JR 728 RS1/16S0R0JR 729 RS1/16S221JR 730 RS1/16S221J



R 751 RD1/4PU821JR 752 RD1/4PU221JR 753 RS1/16S222JR 754 RS1/16S472JR 757 RD1/4PU0R0J


R 836 RS1/16S473JR 837 RD1/4PU391JR 838 RS1/16S102JR 839 RS1/16S102JR 840 RS1/16S102J

R 841 RS1/16S102JR 845 RS1/16S102JR 901 RD1/4PU221JR 902 RS1/16S223JR 903 RS1/16S821J

R 904 RS1/16S821JR 905 RS1/16S0R0JR 911 RS1/16S223JR 914 RS1/16S152JR 915 RD1/4PU152J

R 916 RS1/16S223JR 921 RD1/4PU1R8JR 931 RS1/16S104JR 932 RS1/16S473JR 933 RS1/16S103J

R 934 RS1/16S473JR 935 RS1/16S472JR 961 RS1/16S223JR 962 RS1/16S182JR 963 RD1/4PU1R0J

R 965 RS1/16S182JR 971 RS1/16S153JR 972 RS1/16S153JR 973 RS1/16S222JR 981 RD1/4PU102J

R 4721 RD1/4PU0R0JR 9101 RD1/4PU0R0JR 9403 RD1/4PU0R0J

CAPACITORS

C 101 CKSRYB104K25C 131 CEJQ1R0M50C 132 CEJQ1R0M50C 133 CKSRYB104K25C 134 CKSRYB104K25

C 135 CEJQ1R0M50C 136 CEJQ1R0M50C 137 CEJQ1R0M50C 138 CEJQ1R0M50C 139 CEJQ470M16

C 140 CKSRYB104K25C 143 CEJQ100M16C 145 CKSRYB105K10C 146 CKSRYB105K10C 147 CKSRYB153K50

C 148 CKSRYB153K50C 301 CKSRYB474K10C 302 CKSRYB474K10C 303 CKSRYB474K10C 304 CKSRYB474K10

C 305 CKSRYB474K10C 306 CKSRYB474K10C 307 CKSRYB474K10C 308 CKSRYB474K10C 309 CEHAR330M10

C 310 3300µF/16V CCH1486C 311 CKSRYB104K25C 312 CEHAR100M16C 313 CKSQYB225K10C 314 CKSQYB225K10

C 351 CEJQ100M16C 352 CEJQ100M16C 401 CKSRYB103K50C 402 CEJQ470M6R3C 403 CKSRYB103K50

C 404 CKSRYB103K50C 405 CEJQ101M16C 407 CKSYB475K10C 602 CKSRYB105K10C 603 CCSRCH200J50

C 604 CCSRCH200J50C 605 CEJQ4R7M35C 606 CKSRYB104K25C 608 CCSRCH101J50C 609 CCSRCH470J50


C 753 CEJQ101M16C 901 CEJQ470M10C 902 CKSRYB103K50C 903 CKSRYB472K50C 904 470µF/16V CCH1331



34

1 2 3 4

1 2 3 4

F

E

D

C

B

A

DEH-P2550/XM/ES

C 911 CEJQ221M10C 912 CKSRYB103K50C 913 CEJQ101M16C 921 CEJQ220M10C 922 CKSRYB103K50

C 923 CKSYB475K10C 931 CKSRYB104K25C 961 CKSRYB473K50

Unit Number : CWM8635Unit Name : Keyboard Unit

MISCELLANEOUS

IC 1901 IC PD6340AIC 1902 IC TSOP4840SB1D 1801 LED NSSW440-9159D 1802 LED NSSW440-9159D 1803 LED SML-310PT

D 1804 LED SML-310PTD 1805 LED SML-310PTD 1806 LED SML-310PTD 1807 LED SML-310PTD 1808 LED SML-310PT

D 1809 LED SML-310PTD 1810 LED SML-310PTD 1811 LED SML-310PTD 1812 LED SML-310PTD 1813 LED SML-310PT

D 1814 LED SML-310PTD 1901 Diode DAN202UD 1902 Diode DAP202UX 1901 Ceramic Resonator 4.97MHz CSS1422IL 1801 Lamp 14V 40mA CEL1651

IL 1802 Lamp 14V 40mA CEL1651LCD1901 LCD CAW1759

RESISTORS




R 1901 RS1/16S121JR 1902 RS1/16S2R2JR 1904 RS1/16S222JR 1905 RS1/16S222JR 1906 RS1/16S473J

CAPACITORS

C 1801 CKSRYB104K16C 1802 CKSRYB104K16C 1901 CKSRYB224K10C 1902 CSZS4R7M16

Unit Number : CWM8758Unit Name : Panel Unit

MISCELLANEOUS

D 1970 LED CL220PGCS 1970 Push Switch(EJECT) CSG1112

RESISTORS

R 1970 RS1/16S101JR 1971 RS1/16S101JR 1972 RS1/16S0R0J

CAPACITORS

C 1970 CKSRYB104K16

Unit Number : CWX2708Unit Name : CD Core Unit(S10)

MISCELLANEOUS

IC 201 IC UPD63712GCIC 301 IC BA5996FPIC 701 IC NJM2391DL1-33Q 101 Transistor 2SB1132D 101 Diode 1SS355

D 701 Diode 1SR154-400X 201 Ceramic Resonator 16.934MHz CSS1603S 901 Spring Switch(HOME) CSN1051S 902 Spring Switch(CLAMP) CSN1051S 903 Spring Switch(DSCSNS) CSN1052

S 904 Spring Switch(12EJ) CSN1051S 905 Spring Switch(8EJ) CSN1051

RESISTORS

R 101 RS1/10S1R5JR 102 RS1/10S1R5JR 103 RS1/10S1R5JR 104 RS1/10S1R5JR 105 RS1/10S1R5J

R 201 RS1/16S102JR 202 RS1/16S1002DR 203 RS1/16S1002DR 204 RS1/16S1002DR 205 RS1/16S1002D

R 206 RS1/16S1002DR 207 RS1/16S1002DR 208 RS1/16S1002DR 209 RS1/16S1002DR 214 RS1/16S103J






C

B

D

35

5 6 7 8

F

E

D

C

B

A

5 6 7 8DEH-P2550/XM/ES



R 901 RS1/16S104JR 902 RS1/16S473JR 903 RS1/16S273J

CAPACITORS

C 101 CKSRYB104K16C 102 CKSRYB104K16C 103 100µF/16V CCH1504C 104 47µF/6.3V CCH1506C 106 CCSRCH101J50


C 205 22µF/6.3V CCH1507C 206 CKSRYB103K25C 207 CKSRYB104K16C 208 100µF/6.3V CCH1505C 209 CKSRYB104K16


C 215 CKSRYB104K16C 216 CKSRYB103K25C 217 CCSRCH560J50C 218 CCSRCH5R0C50C 219 CKSRYB104K16

C 220 CKSRYB104K16C 221 CKSRYB104K16C 222 CKSRYB103K25C 223 CCSRCH680J50C 224 CCSRCH470J50

C 225 CKSRYB682K50C 231 CKSRYB102K50C 232 CKSRYB102K50C 301 100µF/16V CCH1504C 302 CCSRCH221J50

C 303 CCSRCH221J50C 304 CKSRYB472K50C 305 CKSRYB103K25C 306 CKSRYB104K16C 501 CKSRYB103K25

C 502 CKSRYB103K25C 702 100µF/16V CCH1504C 703 CKSRYB224K16C 704 CKSRYB104K16C 705 10µF/6.3V CCH1470

Miscellaneous Parts List

Pickup Unit(Service)(P10) CXX1641M 1 Motor Unit(SPINDLE) CXB6007M 2 Motor Unit(LOADING/CARRIAGE) CXB8933


36

1) Cautions on adjustments• In this product the single voltage (3.3V) is used for the regulator. The reference voltage is the REFO1 (1.65V) instead of the GND.If you should mistakenly short the REFO1 with the GND during adjustment, accurate voltage will not be obtained, and the servo’s misoperation will apply excessive shock to the pickup. To avoid such problems:a. Do not mix up the REFO1 with the GND when connecting the (-) probe of measuring instruments. Especially on an oscilloscope, avoid connecting the (-) probe for CH1 to the GND. b. In many cases, measuring instruments have the same potential as that for the (-) probe. Be sure to set the measuring instruments to the floating state.c. If you have mistakenly connected the REFO1 to the GND, turn off the regulator or the power immediately.

• Before mounting and removing filters or leads for adjustment, be sure to turn off the regulator.

• For stable circuit operation, keep the mechanism operating for about one minute or more after the regulator is turned on.

• In the test mode, any software protections will not work. Avoid applying any mechanical or electrical shock to the mechanism during adjustment.

• The RFI and RFO signals with a wide frequency range are easy to oscillate. When observing the signals, insert a resistor of 1k ohms in series.

• The load and eject operation is not guarantied with the mechanism upside down. If the mechanism is blocked due to mistaken eject operation, reset the product or turn off and on the ACC to restore it.

2) Test modeThis mode is used to adjust the CD mechanism module.• To enter the test mode.While pressing the 4 and 6 keys at the same time, reset.• To exit from the test mode.Turn off the ACC and back up.

Notes:a. During ejection, do not press any other keys than the EJECT key until the loaded disc is ejected.b. If you have pressed the (→) key or (←) key during focus search, turn off the power immediately to protect the actuator from damage caused by the lens stuck.c. For the TR jump modes except 100TR, the track jump operation will continue even if the key is released.d. For the CRG move and 100TR jump modes, the tracking loop will be closed at the same time when the key is released.e. When the power is turned off and on, the jump mode is reset to the single TR (91), the RF amp gain is set to 0dB, and the auto-adjustment values are reset to the default settings.

1 2 3 4

1 2 3 4

F

E

D

C

B

A

DEH-P2550/XM/ES

6. ADJUSTMENT

6.1 CD ADJUSTMENT

37

[BAND]

[BAND]

[BAND]

[BAND]

[BAND]

Power On(T.Offset is adjusted)

TRK00 MIN00 SEC00

[CD]or[SOURCE]

Source On

TRK MIN

[4]+[6]+Reset

Test Mode In

[3]

[1]

[1]

Power On(T.Offset is not adjusted)

TRK99 MIN99 SEC99

[2]

[2]

[2]

[2]

Power Off

TRK MIN SEC

Power Off

TRK MIN SEC

Power Off

TRK MIN SEC

Power Off

TRK MIN SEC

Focus Close /S curve check

TRK91 MIN91 SEC91

[6] [1]

[3]

[6]

[3]

Focus Mode switching

*2

TRK0xMIN0xSEC0x

Tracking ServoClose

TRK00 MIN00 SEC00or TRK99 MIN99 SEC99

CRG- *8


[→] [←]

[→] [←]

[→] [←]

CRG+ *8


Automatic adjustment display switching

*3

TRK?? MIN?? SEC??

T.Close and F,T AGCand RF AGC

Applicable servomechanismTRKxx MINxx SECxx

[6]

[3]

T.Close andApplicable servomechanism

TRKxx MINxx SECxx

RF AGC /RF AGC coefficient display

TRK?? MIN?? SEC??

CRG+

TRK8x MIN8x SEC8xor TRK9xMIN9xSEC9x

CRG-

TRK8xMIN8xSEC8xor TRK9xMIN9xSEC9x

T.Balance adjustmentT.Balance coefficient display

TRK?? MIN?? SEC??

F,T,RF AGC /F.Bias display switching

*7

TRK?? MIN?? SEC??

F,T AGC /F.BiasRF AGC

TRKxx MINxx SECxx

CRG/TR Jump value *5

switching

TRKxx MINxx SECxx

CRG/TR Jump +*4

TRK xx MINxx SEC xx

CRG/TR Jump - *4

*6

TRK xx MIN xx SEC xx

Tracking Open

TRK8xMIN8xSEC8xor TRK 9xMIN9xSEC 9x

Tracking Open

TRK8x MIN8x SEC8xor TRK9xMIN9xSEC9x

[Key]

[BAND]

[→]

[6]

[1]

[2]

[3]

-

-

Power On / Off

CRG + / TR Jump + (Direction of the external surface)

CRG - / TR Jump - (Direction of the internal surface)

CLS and AGC and Applicable servomechanism /AGC, AGC display switching

RF Gain switching / Offset adjustment display /T.Balance adjustment / T.Open

Close, S.Curve /

SPDL 1X / 2X switching(Double-speed compatibility only)

Gop measurement

Forcus Mode switching / Tracking Close/ CRG, TR Jump switching

Test Mode

Operation

[KEY]

Contents

Display

Rough Servo and RF AGC / F, T, RF AGC

*1) TYP → -12dB TRK MIN SEC TRK 12 MIN 12 SEC 12

*2) Focus Close → S.Curve → F EQ measurement setting TRK 00 MIN 00 SEC 00 TRK 01 MIN 01 SEC 01 TRK 02 MIN 02 SEC 02 (TRK 99 MIN 99 SEC 99)

*3) F.Offset Display → RF.Offset Display → T.Offset Display

*4) 1TR/32TR/100TR

*5) Single TR → 32TR → 100TR → CRG Move 9x(8x) : 91(81) 92(82) 93(83) 94(84)

*6) Only at the time of CRG Move or 100TR Jump*7) TRK/MIN/SEC → F.AGC → T.AGC Gain → F.bias → RF AGC

*8) CRG motor voltage = 2[V]

[←]

- Flow Chart

5 6 7 8

F

E

D

C

B

A

5 6 7 8DEH-P2550/XM/ES

38

• Note :The grating angle of the PU unit cannot be adjusted after the PU unit is changed. The PU unit in the CD mechanism module is adjusted on the production line to match the CD mechanism module and is thus the best adjusted PU unit for the CD mechanism module. Changing the PU unit is thus best considered as a last resort. However, if the PU unit must be changed, the grating should be checked using the procedure below.

• Purpose :To check that the grating is within an acceptable range when the PU unit is changed.

• Symptoms of Mal-adjustment :If the grating is off by a large amount symptoms such as being unable to close tracking, being unable to perform track search operations, or taking a long time for track searching.

• Method :

• Measuring Equipment• Measuring Points

• Oscilloscope, Two L.P.F.• E, F, REFO1

• Disc • ABEX TCD-782• Mode • TEST MODE

• Checking Procedure1. In test mode, load the disc and switch the 3V regulator on.2. Using the → and ← buttons, move the PU unit to the innermost track.3. Press key 3 to close focus, the display should read "91". Press key 2 to implement the tracking balance adjustment the display should now read "81". Press key 3. The display will change, returning to "81" on the fourth press.4. As shown in the diagram above, monitor the LPF outputs using the oscilloscope and check that the phase difference is within 75° . Refer to the photographs supplied to determine the phase angle.5. If the phase difference is determined to be greater than 75° try changing the PU unit to see if there is any improvement. If, after trying this a number of times, the grating angle does not become less than 75° then the mechanism should be judged to be at fault.• NoteBecause of eccentricity in the disc and a slight misalignment of the clamping center the grating waveform may be seen to "wobble" ( the phase difference changes as the disc rotates). The angle specified above indicates the average angle.

• HintReloading the disc changes the clamp position and may decrease the "wobble".

100kΩ

390pF

100kΩ

390pF

E

VREF

F

VREF

Xch Ych

L.P.F.

L.P.F.

RE

FO1

F E

CD CORE UNIT(S10)

Oscilloscope

1 2 3 4

1 2 3 4

F

E

D

C

B

A

DEH-P2550/XM/ES

6.2 CHECKING THE GRATING AFTER CHANGING THE PICKUP UNIT

39

Grating waveform

45°

0°

75°

60°

30°

90°

Ech → Xch 20mV/div, ACFch → Ych 20mV/div, AC

5 6 7 8

F

E

D

C

B

A

5 6 7 8DEH-P2550/XM/ES

40

- Error Messages

If a CD is not operative or stopped during operation due to an error, the error mode is turned on and cause(s) of the error is indicated with a corresponding number. This arrangement is intended at reducing nonsense calls from the users and also for facilitating trouble analysis and repair work in servicing.

(1) Basic Indication Method

1) When SERRORM is selected for the CSMOD (CD mode area for the system), error codes are written to DMIN (minutes display area) and DSEC (seconds display area). The same data is written to DMIN and DSEC. DTNO remains in blank as before.

2) Head unit display examples

Depending on display capability of LCD used, display will vary as shown below. xx contains the error number.

8-digit display 6-digit display 4-digit display

ERROR–xx ERR–xx E–xx

(2) Error Code List

Code Class Displayed error code Description of the code and potential cause(s)

10 Electricity Carriage Home NG CRG can't be moved to inner diameter.

SERVO LSI Com- CRG can't be moved from inner diameter.

munication Error → Failure on home switch or CRG move mechanism.

Communication error between microcomputer and SERVO LSI.

11 Electricity Focus Servo NG Focusing not available.

→ Stains on rear side of disc or excessive vibrations on REWRITABLE.

12 Electricity Spindle Lock NG Spindle not locked. Sub-code is strange (not readable).

Subcode NG → Failure on spindle, stains or damages on disc, or excessive vibrations.

A disc not containing CD-R data is found.

Turned over disc are found, though rarely.

CD signal error.

17 Electricity Setup NG AGC protection doesn't work. Focus can be easily lost.

→ Damages or stains on disc, or excessive vibrations on REWRITABLE.

30 Electricity Search Time Out Failed to reach target address.

→ CRG tracking error or damages on disc.

44 Electricity ALL Skip Skip setting for all track.

(CD-R/RW)

50 Mechanism CD On Mech Error Mechanical error during CD ON.

→ Defective loading motor, mechanical lock and mechanical sensor.

A0 System Power Supply NG Power (VD) is ground faulted.

→ Failure on SW transistor or power supply (failure on connector).

Remarks: Mechanical errors are not displayed (because a CD is turned off in these errors).

Unreadable TOC does not constitute an error. An intended operation continues in this case.

Upper digits of an error code are subdivided as shown below:

1x: Setup relevant errors, 3x: Search relevant errors, Ax: Other errors.

1 2 3 4

1 2 3 4

F

E

D

C

B

A

DEH-P2550/XM/ES

6.3 ERROR MODE

41

1

1

Fig.1

Fig.2

- Removing the CD Mechanism Module (Fig.1)

- Removing the Tuner Amp Unit (Fig.2)

Remove the four screws.

Remove the screw.

1. Remove the Case.

- Removing the Case (not shown)

Disconnect the connector and then remove theCD Mechanism Module.

- Removing the Grille Assy (Fig.1)

2 Remove the two screws and then removethe Grille Assy.

1

1

2 2

CD Mechanism Module

Grille Assy

1

2

22

3 3 3

4

Tuner Amp Unit

2 Remove the three screws.

3 Straight the tabs at three locations indicated.

4 Remove the screw and then remove the Tuner Amp Unit.

1

1

5 6 7 8

F

E

D

C

B

A

5 6 7 8DEH-P2550/XM/ES

7. GENERAL INFORMATION

7.1 DIAGNOSIS

7.1.1 DISASSEMBLY

42

1 2 3 4

1 2 3 4

F

E

D

C

B

A

DEH-P2550/XM/ES

- How to hold the Mechanical Unit1. Hold the top and bottom frame.2. Do not squeeze top frame's front portion too tight, because it is fragile.

- Removing the Upper and Lower Frames1. With a disc clamped, remove the four springs (A), the two springs (B), the two springs (C), and the four screws.2. To remove the upper frame, open it on the fulcrum A.3. While lifting the carriage mechanism, remove the three dampers.4. With the frames removed, insert the connectors coming from the main unit and eject the disc.Caution: Before installing the carriage mechanism in the frames, be sure to apply some alcohol to the dampers and set the mechanism to the clamp mode.

Do not squeeze.

Lower FrameDamper

Carriage Mechanism

A

C

A

B

B

Damper

Damper

C

A

A

A

Upper Frame

- Removing the Pickup Unit1. Set the mechanism to the clamp mode.2. Remove the lead wires from the inner holder.3. Remove the two washers, styling holder, change arm, and pickup lock arm.4. While releasing from the hook of the inner holder, lift the end of the feed screw.Caution: In assembling, move the planet gear to the load/eject position before setting the feed screw in the inner holder.

Planet Gear

Change Arm

Inner Holder

Styling Holder

Feed Screw

Washer

Pickup Lock Arm

43

10A2

164

68

1012

141

153

57

911

13

1. F

R+

2. R

R-

3. F

R-

4. R

R+

5. F

L+6.

RL+

7. F

L-8.

RL-

9. N

C10

. NC

11. B

.RE

M12

. NC

13. N

C14

. AC

C15

. GN

D16

. BA

CK

UP

AN

TE

NN

A J

AC

KR

EA

R O

UT

PU

T

1. B

US

+ 2

. GN

D 3

. GN

D 4

. NC

5. B

US

- 6

. GN

D 7

. BU

S L

+ IN

PU

T 8

. AS

EN

B 9

. BU

S R

+ IN

PU

T10

. BU

S R

- IN

PU

T11

. BU

S L

- IN

PU

T

1110

98

76

5

43

21

5 6 7 8

F

E

D

C

B

A

5 6 7 8DEH-P2550/XM/ES

7.1.2 CONNECTOR FUNCTION DESCRIPTION

44

- Pin Functions(PE5341C) Pin No. Pin Name I/O Format Function and Operation 1 swvdd O C Grille : Chip enable output 2-4 NC Not used 5 TESTIN I Test program mode input 6 LCDPW O C LCD back light power supply control output 7 TELIN I Telephone mute input 8 ejectin I Eject sense input 9 FLPILM I Flap illumination input 10 DALMON I/O C For consumption low-current 11 reset I Reset input 12 XT2 Not used 13 XT1 I Clock connection pin 14 VSS GND 15 X2 Crystal oscillator connection pin 16 X1 I Crystal oscillator connection pin 17 REGOFF I Regulator operation specification signal 18 REGC Capacitor for regulator connect pin 19 VDD Power supply 20 ILMPW O Illumination power supply control output 21 SYSPW O C System power control output 22 adpw O C A/D converter power supply control output 23 NC Not used 24 IPPW O C Power supply control output for IP BUS interface IC 25 NC Not used 26 ROMDATA O C ROM correction data output 27 ROMCLK O C ROM correction clock output 28 ROMCS O ROM correction chip select output 29-31 NC Not used 32 tunpce@ O PLL chip enable output2 33 VST O E.VOL : Strobe output 34 VCK O E.VOL : Clock output 35 VDT O E.VOL : Data output 36 ANTPW O Antenna power output 37 MUTE O C System mute output 38, 39 NC Not used 40 VSS GND 41 VDD Power supply 42 RDS57K I 57kHz count pulse input 43 drst O C RDS : Decoder reset output 44 rdslk I C RDS : Decoder clock input 45 RDT O C RDS : Decoder data input 46 DORAON O C TUNER : 3V power supply 47-57 NC Not used 58 STRKEY2 I Steering remote controller input 59 CDLOEJ O C CD : Load Moter Load/Eject output 60 CLCONT I CD : Driver input switch output 61 CONT O C CD : Servo driver power supply control output 62 PCL O C Clock adjustment 63 CLAMPSW I Clamp SW input 64 VDCONT O C CD : VD power control output 65 xsck(TSCK) O CD LSI clock output 66 XSI(TSI) I CD LSI data input 67 XSO(TSO) O C CD LSI data output 68 XAO O C CD LSI command/data control output 69 xrst O C CD : LSI reset control output 70 xstb O CD LSI strobe output 71 ASENBO O IP-BUS : Slave power supply control output 72 EMUTE O E.VOL : Mute control output 73 TEST GND 74 SL I C TUNER : Signal level input 75 STRKEY1 I C Steering remote controller input

1 2 3 4

1 2 3 4

F

E

D

C

B

A

DEH-P2550/XM/ES

7.2 PARTS

7.2.1 IC

45

Pin No. Pin Name I/O Format Function and Operation 76 MODELIN I Model select input 77 CSENS I Flap close sense input 78 NC Not used 79 DSCSNS I CD : Disc insert sense input 80 VDSENS I CD : VD voltage sense input 81 TEMP I CD : Temperature sense input 82 AVDD A/D converter power supply terminal 83 AVREF A/D converter reference voltage terminal 84 AVSS GND 85 RX I IP-BUS : Data input 86 TX O IP-BUS : Data output 87 NMI GND 88 ldet I PLL lock sense input 89 rck I RDS : Clock input 90 dsens I Grille detach sense input 91 PACK I PACK input 92 asens I ACC power sense input 93 bsens I Back up power sense input 94 TUNPDI I PLL IC data input 95 KYDT I Grille data input 96 DPDT O C Grille data output 97 TUNPCK O PLL clock output 98 TUNPDO O C PLL data output 99 TUNPCE O C PLL chip enable output 100 PEE O C Beep tone output

* PE5341C

30

3150

51

80

81 100

1

Format Meaning

C CMOS

IC's marked by * are MOS type.Be careful in handling them because they are very liable to be damaged by electrostatic induction.

5 6 7 8

F

E

D

C

B

A

5 6 7 8DEH-P2550/XM/ES

1 2 3

VD

D

GN

D

5 4

VO

UT

N.C

.

N.C

.

Vref

BD4834G

46

1

TAB

2

P-GND2

3

OUT2-

4

STBY

5

OUT2+

6

VCC

7

OUT1-

8

P-GND1

9

OUT1+

10SVR

11IN1

12IN2

13S-GND

14IN4

15IN3

16AC-GND

17OUT3+

18P-GND3

19OUT3-

20VCC

21OUT4+

22MUTE

23OUT4-

24P-GND4

SWITCH

25

+-

+ -

OffsetDetection

+-

+ -

OffsetDetection

+-

+ -

OffsetDetection

+-

+ -

OffsetDetection

Protector;Over current limit

sw_v

cc

stby

Protector;Short circuit

Mute circuit

am

p_v

cc

Stand-byCircuit

Protector;Over voltage

sw_v

cc

Protector;Thermal

Referenceamp_vcc

1 2 3 4

1 2 3 4

F

E

D

C

B

A

DEH-P2550/XM/ES

PAL007A

47

5 6 7 8

F

E

D

C

B

A

5 6 7 8DEH-P2550/XM/ES

TSOP4840SB1

- Pin Functions (PD6340A)Pin No. Pin Name I/O Function and Operation

1-5 SEG4-0 O LCD segment output6-9 COM3-0 O LCD common output 10 VLCD LCD drive power supply

11-14 KST3-0 O Key strobe output15,16 KDT0,1 I Key data input (analogue input)

17 REM I Remote control reception input18 DPDT I Display data input19 NC Not used20 KYDT O Key data output21 MODA GND22 X0 Crystal oscillator connection pin23 X1 Crystal oscillator connection pin24 VSS GND

25,26 KDT2,3 I Key data input27 NC Not used28 KST4 O Key strobe output

29-32 NC Not used33-55 SEG35-13 O LCD segment output

56 VDD Power supply57-64 SEG12-5 O LCD segment output

*PD6340A

49

4833

32

17

16 1

64

OUT GND VCC

PIN

1 2 3

ControlCircuit

BandPassAGC

Input

Demodu-lator

48

- Pin Functions(UPD63712GC) Pin No. Pin Name I/O Function and Operation 1 LD O Output of LD 2 PD I Input of PD 3 PN I Assignment of pickup polarity 4 AVDD Power supply for the analog system 5 DGND Ground for digital circuits 6 RFOK O Output of RFOK 7 INTQ O Interruption signals to the external microcomputer 8 rst I Input of reset 9 A0 I Command/Parameter discrimination signal input 10 stb I Data strobe signal input 11 sck I Serial data clock input 12 SO O Serial data output 13 SI I Serial data input 14 DVDD Power supply for digital circuits 15 DAVDD Power supply for DAC 16 ROUT O Output of audio for the right channel 17 DAGND GND for DAC 18 REGC Connected to the capacitor for band gap 19 DAGND GND for DAC 20 LOUT O Output of audio for the left channel 21 DAVDD Power supply for DAC 22 XVDD Power supply for the crystal oscillator 23 xtal O Connected to the crystal oscillator 24 XTAL I Connected to the crystal oscillator 25 XGND Ground for the crystal oscillator 26 DVDD Power supply for digital circuits 27 C1D1 O Information on error correction 28 C1D2 O Information on error correction 29 C2D1 O Information on error correction 30 C2D2 O Information on error correction 31 C2D3 O Information on error correction 32 LOCK O Output of LOCK 33 MIRR O MIRR signal 34 HOLD O HOLD signal 35 PLCK O Output of PLCK 36 C16M O Output of 16.9344MHz 37 DGND Ground for digital circuits 38 TX O DAI output 39 EMPH O Pre-emphasis information output 40 FLAG O The flag for which output sound data cannot be corrected is outputted 41 DVDD Power supply for digital circuits 42 LIMIT I Signal is inputted when the register can be read 43 xtalen I Permission to oscillate 44 DGND Ground for digital circuits 45 DIN I Input of audio data 46 DOUT O Output of audio data 47 SCKIN I Clock input for audio data 48 SCKO O Clock output for audio data 49 LRCKIN I Input of LRCK for audio data 50 LRCK O Output LRCK for audio data 51 DVDD Power supply for digital circuits 52 FD+ O Output of focus drive PWM 53 FD- O Output of focus drive PWM 54 TD+ O Output of tracking drive PWM 55 TD- O Output of tracking drive PWM 56 SD+ O Output of thread drive PWM 57 SD- O Output of thread drive PWM 58 MD+ O Output of spindle drive PWM 59 MD- O Output of spindle drive PWM 60 DGND Ground for digital circuits

1 2 3 4

1 2 3 4

F

E

D

C

B

A

DEH-P2550/XM/ES

49

Pin No. Pin Name I/O Function and Operation 61 TESTEN I Connected to GND 62-66 TEST4-0 I Connected to GND 67 ADGND GND for DAC 68 EFM O Output of EFM signals 69 ASY I Input of asymmetry 70 ADVDD Power supply for DAC 71 RFI I Input of RF 72, 73 EQ2, 1 Equalizer 2, 1 74 RF- I Reversal input of RF 75 RF2- I Reversal input of RF2 76 AGCO O Output of RF 77 AGCI I Input of AGC 78 RFO O Output of RF 79 ATEST O Analog tests 80 C3T Connection to the capacitor for detecting 3T 81 AGND Ground for the analog system 82 A I Input of A 83 C I Input of C 84 B I Input of B 85 D I Input of D 86 F I Input of F 87 E I Input of E 88 VREFIN I Photo-detector input bias voltage 89 AVDD Power supply for the analog system 90 REFOUT O Output of reference voltage 91 REFC Connected to the capacitor for output of REFOUT 92 FE- I Reversal input of FE 93 FEO O Output of FE 94 ADCIN I TEST 95 TE- I Reversal input of TE 96 TEO O Output of TE 97 TE2 O TE2 98 TEC I TEC 99 AGND Ground for the analog system 100 PWMSW I Servo PWM mode switching

* UPD63712GC

25

2650

51

75

76 100

1

5 6 7 8

F

E

D

C

B

A

5 6 7 8DEH-P2550/XM/ES

50

- Pin Functions(BA5996FP) Pin No. Pin Name Function and Operation 1 VR Input pin for reference voltage 2 OPIN2(+) Input pin for non-inverting input for CH2 preamplifier 3 OPIN2(-) Input pin for inverting input for CH2 preamplifier 4 OPOUT2 Output pin for CH2 preamplifier 5 OPIN1(+) Input pin for non-inverting input for CH1 preamplifier 6 OPIN1(-) Input pin for inverting input from CH1 preamplifier 7 OPOUT1 Output pin for CH1 preamplifier 8 GND Ground pin 9 MUTE Mute control pin 10 POWVCC1 Power supply pin for CH1, CH2, and CH3 at "Power" stage 11 VO1(-) Driver CH1 - Negative output 12 VO1(+) Driver CH2 - Positive output 13 VO2(-) Driver CH2 - Negative output 14 VO2(+) Driver CH2 - Positive output 15 VO3(+) Driver CH2 - Positive output 16 VO3(-) Driver CH2 - Negative output 17 VO4(+) Driver CH4 - Positive output 18 VO4(-) Driver CH4 - Negative output 19 POWVCC2 Power supply pin for CH4 at "Power" stage 20 GND Ground pin 21 CNT Control pin 22 LDIN Loading input 23 OPOUTSL Output pin for preamplifier for thread 24 OPINLSL Input pin for preamplifier for thread 25 OPOUT3 CH3 preamplifier output pin 26 OPIN3(-) Input pin for inverting input for CH3 preamplifier 27 OPIN3(+) Input pin for non-inverting input for CH3 preamplifier 28 PREVCC PreVcc

BA5996FP

114

15 28

1 2 3 4

1 2 3 4

F

E

D

C

B

A

DEH-P2550/XM/ES

IN OUTGND

1 32

ThermalShutdown

Over currentprotector

VREF

+-

NJM2391DL1-33

51

No. Symbol I/O Explain1 AMANT I AM antenna input AM antenna input high impedance AMANT pin is connected with

an all antenna by way of 4.7µH. (LAU type inductor) A series circuit including an inductor and a resistor is connected with RF ground for the countermeasure against the ham of power transmission line.

2 RFGND RF ground Ground of antenna block3 FMANT I FM antenna input Input of FM antenna 75Ω Surge absorber(DSP-201M-S00B) is necessary.4 VCC power supply The power supply for analog block. D.C 8.4V ± 0.3V5 SL O signal level Output of FM/AM signals level6 CE2 I chip enable-2 Chip enable for EEPROM ”Low” active7 WC I write control You can write EEPROM, when EEPROM write control is “Low”.

Ordinary non connection8 CE1 I chip enable-1 Chip enable for AF•RF ”High” active9 CK I clock Clock

10 DI I data in Data input11 NC non connection Not used12 OSCGND osc ground Ground of oscillator block13 ROM_VDD power supply Power supply for EEPROM pin 13 is connected with a power supply of

micro computer.14 DO O data out Data output15 DGND digital ground Ground of digital block16 NC non connection Not used17 VDD_3.3 power supply The power supply for digital block. 3.3V ± 0.2V18 NC non connection Not used19 NC non connection Not used20 NC non connection Not used21 NC non connection Not used22 AUDIOGND audio ground Ground of audio block23 L ch O L channel output FM stereo “L-ch” signal output or AM audio output 24 R ch O R channel output FM stereo “R-ch” signal output or AM audio output

FMRF

ANT adjRF adj

FM ANT

T51 CF52CF51

RFG

ND

OS

CG

ND

DG

ND

AU

DIO

GN

D

NC

VC

C

VD

D_3

.3

3.3V 2.5VIC 4

3.3V 2.5V

←

IC 22.5V

WC

CE

2

RO

M_V

DD SL DI

CK

CE

1

NC

DO

NC

NC

NC

NC

7 6 13 5 10 9 8 11 14 18 19 20 21

1

3

2 12 15 22 16 4 17

IC 13.3V

AM ANT FMRFATT

LPFOSC

IC 3 EEPROM5.0V

IC 55V 3.3V←

ATT

MIXER, IF AMP DET, FM MPX

24

23

Rch

Lch

- FM/AM Tuner Unit

5 6 7 8

F

E

D

C

B

A

5 6 7 8DEH-P2550/XM/ES

52

SEG39

SEG38

SEG37

SEG36

COM3

COM2

COM1

COM0

SEG35

SEG34

SEG33

SEG32

SEG31

SEG30

SEG29

SEG28

SEG27

SEG26

SEG25

SEG24

SEG23

SEG22

SEG21

SEG20

SEG19

SEG18

SEG17

SEG16

SEG15

SEG14

SEG13

SEG12

SEG11

SEG10

SEG9

SEG8

SEG7

SEG6

SEG5

SEG4

SEG3

SEG2

SEG1

SEG0

COM3

CO

MM

ON

SE

GM

EN

T

COM2

COM1

COM0

1 2 3 4

1 2 3 4

F

E

D

C

B

A

DEH-P2550/XM/ES

7.2.2 DISPLAY

- LCD(CAW1759)

53

5 6 7 8

F

E

D

C

B

A

5 6 7 8DEH-P2550/XM/ES

VDD=5VPin 41

ASENBO←HPin 71

Power ON

bsens=L

asens=L

dsens=L

bsensPin 93

asensPin 92

dsensPin 90

swvdd←HPin 1

Source keys operative

Completes power-on operation.(After that, proceed to each source operation)

SYSPW←HPin 21

Startscommunication

with Grillemicrocomputer.

Source ON

300ms

300ms

In case of the above signal, the communication with Grille microcomputer may fail.If the time interval is not 300msec, the oscillator may be defective.

CSENSPin 77

2V < CSENS < 3V

- CSENS 2V, 3V CSENS Last source returns. CD loading functions are available. Keys except for EJECT key are not available.

< <= =

7.3 OPERATIONAL FLOW CHART

54

1 2 3 4

1 2 3 4

F

E

D

C

B

A

DEH-P2550/XM/ES

Before shipping out the product, be sure to clean the following portions by using the prescribed cleaning tools:

Portions to be cleaned Cleaning tools

CD pickup lenses Cleaning liquid : GEM1004

Cleaning paper : GED-008

7.4 CLEANING

55

5 6 7 8

F

E

D

C

B

A

5 6 7 8DEH-P2550/XM/ES

8. OPERATIONS

56

1 2 3 4

1 2 3 4

F

E

D

C

B

A

DEH-P2550/XM/ES

57

5 6 7 8

F

E

D

C

B

A

5 6 7 8DEH-P2550/XM/ES

58

1 2 3 4

1 2 3 4

F

E

D

C

B

A

DEH-P2550/XM/ES

Fixi

ng th

e Fr

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ear

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ulti-

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play

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rate

ly)

6.IP

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ble

9.B

lack

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hicl

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ello

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term

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less

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nitio

nsw

itch

posi

tion.

10.

Fuse

5 6 7 8

F

E

D

C

B

A

5 6 7 8DEH-P2550/XM/ES

Pioneer Deh p2550

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Transcript of Pioneer Deh p2550