Download - SERVICE MANUAL AG-790 - audio-circuit.dk

AAGG--779900

SERVICE MANUAL

AM/FM Stereo Receiver

Effective : April, 2003 S-0092A

NOTES

● PC boards shown are viewed from parts side.● The parts with no reference number or no parts number in the

exploded views are not supplied.● As regards the resistors and capacitors, refer to the circuit diagrams

contained in this manual.●£ Parts marked with this sign are safety critical components. They

must be replaced with identical components - refer to the appropriateparts list and ensure exact replacement.

CONTENTS1 SPECIFICATIONS ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・22 ADJUSTMENTS AND CHECKS ・・・・・・・・・・・・・・・・・・・・・・・・33 EXPLODED VIEWS AND PARTS LIST ・・・・・・・・・・・・・・・・・64 PC BOARDS AND PARTS LIST ・・・・・・・・・・・・・・・・・・・・・・・・8

1 SPECIFICATIONS

－2－

Amplifier SectionOutput Power....100 + 100 watts RMS (0.9 % THD, 1 kHz, 8 ohms)Total Harmonic Distortion.................... 0.05 % (at 70 watts,1 kHz)Input Sensitivity/Impedance .................. PHONO: 5 mV/22 kohms

LINE: 300 mV/22 kohmsFrequency Response ...................... PHONO: 20 Hz–20 kHz, ±3 dB

LINE: 20 Hz–50 kHz, +1/–3 dBSignal-to-Noise Ratio ................................ PHONO: 80 dB (IHF-A)

LINE: 80 dB (IHF-A)Tone Control ............................................ BASS: ±10 dB at 100 Hz

TREBLE: ±10 dB at 10 kHzLoudness Control (Volume at –40 dB Position) ..............................

+9 dB at 100 Hz, +8 dB at 10 kHz

FM Tuner Section(Without notes 98.1 MHz, 65 dBf)

Tuning Range .................... 87.5 MHz–108.0 MHz (100 kHz steps)Usable Sensitivity (IHF) ............................................ Mono: 20 dBf50 dB Quieting Sensitivity ................ Mono: 39 dBf, Stereo: 46 dBfCapture Ratio ...................................................................... 2.8 dBImage Rejection Ratio .......................................................... 20 dBAM Suppresion Ratio............................................................ 48 dBHarmonic Distortion (1 kHz) .............. Mono: 0.4 %, Stereo: 0.5 %Frequency Response................................ 30 Hz–15 kHz, +2/–3 dBStereo Separation (1 kHz) .................................................... 35 dBSignal-to-Noise Ratio ........................ Mono: 57 dB, Stereo: 55 dB

AM Tuner SectionTuning Range .......................... 530 kHz–1,720 kHz (10 kHz steps)Usable Sensitivity ............................................................ 55 dB/mTotal Harmonic Distortion .................................... 1 % at 85 dB/mSignal-to-Noise Ratio ........................................ 48 dB at 85 dB/m

GeneralPower Requirements.................................. 120 V/230 V, 50-60 Hz Power Consumption ............................................................ 180 W AC Outlets ................ Unswitched x 2, Total 100 W max (1 A max)Dimensions (W x H x D)................................ 435 x 139 x 335 mm

(17-1/8" x 5-1/2" x 13-3/16")Weight (net) ................................................ 9.4 kg (20-11/16 lbs)Standard Accessories .................................. AM Loop Antenna x 1

FM ”T” Type Antenna x 1Remote Control Unit x 1

• Design and specifications are subject to change without notice.

Voltage Conversion(General export models only)

Be sure to remove the power cord from the AC outlet beforerepositioning the voltage converter switch.

1. Locate the voltage selector on the rear panel.2. Using a flat-bladed screwdriver, set to the appropriate

230V or 120V position according to your area.

IN NORTH AMERICA USE ONLY ON 120 V SUPPLY.

2 ADJUSTMENTS AND CHECKS

－3－

2-1 AMPLIFIER SECTION

Bias Current Adjustment

1. Turn the unit on, and set the input selector switch to "CD".2. Set 7VR1 and 7VR2 to the center position.3. Connect the DC voltmeter as shown below after preheating for

10 minutes, and adjust 7VR2 (Lch) so that the voltagebecomes 3.3±1.3mV.

4. Adjust 7VR1 (Rch) in the same way.

7VR17VR2

7R46 7R44

0.33/5W 0.33/5W

DC voltmeter

7R45 7R43

0.33/5W 0.33/5W

DC voltmeter

MAIN PCB

－4－

ITEMSETTING ADJUSTMENT

POINTS ADJUST

2. AM Sensitivity

∫600 kHz/1500 kHz50 dB/m400 Hz (30 % Mod)

çREC OUT

AM 600 kHz 2T1 (BLK) Max.

3. AM IF

∫1000 kHz50 dB/m400 Hz (30 % Mod)

çREC OUT AM 1000 kHz 2T3 (WHT) Max.

4. FM Sensitivity

∂90 MHz10~20 dBf1 kHz (100 % Mod)

ƒREC OUT FM 90 MHz 2L2 (4.5T) Max.

5. FM Distortion

∂98 MHz60 dBf1 kHz (100 % Mod)

©REC OUT FM 98 MHz 2T4 (PINK) Min. distortion

6. FM Stereo

∂é98 MHz60 dBfStereo signal L-R

©REC OUT FM 98 MHz 2T5, 2T6 Min. distortion

1. VT Adjustå2R19 (VT)2J2 (GND)

FM 87.5 MHz 2L3 (3.5T) DC 1.0±0.05V

INPUT OUTPUT AG-790

After adjusting 2TC2, readjust 2T1 at 600 kHz.

AM 1500 kHz 2TC2 Max.

AM 1720 kHz

AM 530 kHz

FM 108.0 MHz

Check

2T2 (RED)

Check

≦ 8.0V

DC 1.1±0.05V

DC 8.0±0.5V

2-2 TUNER SECTION

－5－

AC VoltmeterFM Signal Generator

Stereo Signal Generator

Distortion Analyzer

D

E

G

F

AC Voltmeter

AM Signal Generator

B

C

AM LoopAntenna

60cm

2T3

2T6

2T5

2T2

2T1

2T4

2L2

2L3

2TC2

2R192J2 TUNER PCB

+ －

DC VoltmeterA

3 EXPLODED VIEWS AND PARTS LIST

－6－

－7－

EXPLODED VIEW LIST

REF.NO. PARTS NO. DESCRIPTION REMARKS

1 9A09760000 TONE KEY 530503500 2 9A09759900 TUNING KEY 530503300 3 9A09759800 FUNCTION KEY 530503400 4 9A09760200 VOLUME KNOB 530503600 5 9A09759700 DISPLAY LENS 510503800

6 9A09759600 PANEL 510503700 7 9A09760100 POWER KNOB 530503200 8 £ 9A06602800 POWER SWITCH 180222501 9 9A09760300 SP KNOB 530503100 10 9A09758660 SP SEL PCB ASSY 037900303

11 9A09758160 HEADPHONE PCB ASSY 037900405 12 9A09755060 FRONT PCB ASSY 037900105 13 9A09760700 TOP COVER 520505400 14 9A09760600 REAR COVER 520505300 15 £ 9A06900600 CORD BUSHING 550011700

16 £ 9A09580200 AC POWER CORD 210183011 17 9A09759060 SP JACK PCB ASSY 037900605 18 9A09752260 MAIN PCB ASSY 037900206 19 9A09756560 POWER PCB ASSY 037900505 21 9A09760500 BOTTOM COVER 520505200

22 £ 9A09759500 POWER TRANSFORMER 159642022 23 9A09760900 HEAT SINK 560502200 24 9A06901200 H/S BRACKET 540082800 25 9A06536400 LEG(GOLD) 540082601 26 9A09581500 RUBBER PAD 540503600

27 9A06536300 LEG(BLACK) 540082600 36 9A06900700 NAME PLATE 510104300 37 9A09757660 TUNER PCB ASSY 033700305 38 9A09760800 BRACKET 520505500 39 9A09591600 PCB SUPPORT 550505200

40 9A09760400 PCB SUPPORT 550505300 42 £ 9A06602900 AC SOCKET 26CS18401 43 9A09758500 HEADPHONE JACK HOLDER 550505400 44 £ 9A09759400 VOLTAGE SWITCH 180222902 45 9A06904300 GND TERMINAL,M3 320018601 46 9A09592000 SILICON RUBBER,T0-3P2 322228370

INCLUDED ACCESSORIES

REF.NO. PARTS NO. DESCRIPTION REMARKS

9A09551200 OWNER'S MANUAL,EFSP 600520225 9A09763000 REMOTE CONTROL UNIT,UR-420 500079000 9A06902500 FM ANT 59W360100 9A06902600 AM ANT 59W360200

－8－

4 PC BOARDS AND PARTS LIST

MAIN PCB

－9－

SP JACK PCB

SP SEL PCB

HEADPHONE PCB

POWER PCB

FRONT PCB

TUNER PCB

MAIN PCB ASSY

REF.NO. PARTS NO. DESCRIPTION

9A09752260 MAIN PCB ASSY 9A09752300 MAIN PCB 9A06896100 FUSE CLIP 9A09754600 RCA JACK,RCA602 9A09754700 RCA JACK,RCA402

9A09754800 WAFER,3P 9A09754900 WAFER,5P

1C1 £ 9A09586700 C,ELEC 35V 100UF M 1C4-5 £ 9A09586600 C,ELEC 25V 2200UF M 1C12 £ 9A09586500 C,ELEC 25V 100UF M

1C14-15 £ 9A09752500 C,ELEC 70V 8200UF M 1D1-8 £ 9A09589300 DIODE,IN4004 1D9-12 £ 9A09753100 DIODE,6A10 1D13-14 9A09589500 DIODE,IN4148 1D15-18 £ 9A09589300 DIODE,IN4004

1D19-22 9A09589500 DIODE,IN4148 1D23 9A09589100 DIODE,ZENER 24V 1W 1FU1-2 £ 9A09753200 FUSE,6.3A 250V SLOW BLOW1FU3-4 £ 9A09753300 FUSE,2A 250V SLOW BLOW1N1 £ 9A09590800 IC,L7812CV

1N2 £ 9A09590900 IC,L7912CV 1N3 £ 9A09590700 IC,L7805CV 1N4 £ 9A09753400 IC,L7809CV 3D1 9A09588800 DIODE,ZENER 6V8 1/2W 3N1 9A09753500 IC,TC9421

3N2 9A09590500 IC,TC4066BP 3V1-2 9A09589600 TR,2SC1815GR 4N1 9A09590600 IC,JRC4560D 5N1 9A09590600 IC,JRC4560D 7C28 £ 9A09587100 C,ELEC 63V 47UF M

7D1-4 9A09589000 DIODE,ZENER 24V 1/2W 7D5-6 9A09589500 DIODE,IN4148 7D7 9A09589200 DIODE,ZENER 30V 1/2W 7D8 9A09589500 DIODE,IN4148 7D9 9A09588900 DIODE,ZENER 12V 1/2W

7L1-2 9A09591000 COIL,SPRING 1.5UH7R25-28 £ 9A06889900 R,1/2W 3.3K 7R43-46 £ 9A09753600 R,CEMENT 5W R33 J 7R61-62 £ 9A09585400 R,2W 6R1 J 7R68 £ 9A06889900 R,1/2W 3.3K

7R70 £ 9A07127500 R,2W 47 FMO 7R77-78 £ 9A09585500 R,2W 10 J 7V1-4 9A09589700 TR,2N5551 7V5-10 9A09589800 TR,2N5401 7V11-14 9A09589700 TR,2N5551

7V15-16 9A09753800 TR,2SD669A 7V17-18 9A09753900 TR,2SB649A 7V19-20 £ 9A09754000 TR,2SC5200-O 7V21-22 £ 9A09754100 TR,2SA1943-O 7V23-24 9A09589700 TR,2N5551

7V25 9A09589800 TR,2N5401 7V26-29 9A09590100 TR,2SC8050D 7VR1-2 9A09585700 VR,SEMI-FIXED 300 J RELA-D 9A09591100 RELAY,12V 5A

FRONT PCB ASSY


9A09755060 FRONT PCB ASSY 9A09755100 FRONT PCB 9A09756400 VFD DISPLAY

8D1 9A09592400 DIODE,ZENER 5V1 1/2W 8D2-7 9A09589500 DIODE,IN4148

8G1 9A09592800 OSC,CRYSTAL 4.433M8IR1 9A09755300 INFRARED RECEIVER,SM00388N1 9A09755400 IC,HT48R50A-1 8N2 9A09755500 IC,PT6311 8N3 9A09592600 IC,HT24LC02

8V1 9A09755700 TR,2SA1015GR8VR1 9A09755800 ENCODER,R162EC-D1-20F-24CLED1-3 9A09755900 LED,M3 RED SW1-16 9A09593100 SW,TACT

TUNER PCB ASSY


9A09757660 TUNER PCB ASSY 9A09625000 TUNER PCB 9A09625100 TUNER SHIELD CASE

2D1-2 9A09589500 DIODE,IN4148 2G1 9A09622100 FILTER,CERAMIC L10.7MS2 R

2G2 9A09622200 FILTER,CERAMIC SFU450B 2G3 9A09622100 FILTER,CERAMIC L10.7MS2 R2G4 9A09622300 OSC,CRYSTAL 4.5MHZ2L1 9A09622400 COIL,SPRING 3.5T M4.5 2L2 9A09622500 COIL,SPRING 4.5T M3.5

2L3 9A09622600 COIL,SPRING 3.5T M3.5 2L4 9A09622700 INDUCTOR,AL0410 1022L5 9A09622800 INDUCTOR,AL0410 2212N1 9A09622900 IC,TA2149N 2N2 9A09623000 IC,TC9257F

2T1 9A09623800 IFT,AM RF 10B(BLK) 2T2 9A09623900 IFT,AM OSC 7B(RED) 2T3 9A09624000 IFT,AM IFT 7B(WHT) 2T4 9A09624100 IFT,FM DET 7B(PNK) 2T5-6 9A09624200 IFT,MPX 8B(BLK)

2TC2 9A09624300 SVC,CYM1-2/7 2V1 9A09624400 FET,2SK161GR 2V2 9A09624700 TR,2SC9018H 2V3 9A09624600 TR,2SC9014C 2V4-5 9A09589600 TR,2SC1815GR

2V8 9A09624700 TR,2SC9018H 2VD1-2 9A09624800 DIODE,VARACTOR V1043 2VD3-4 9A09624900 DIODE,VARACTOR V149B 2X1 9A07129000 ANT JACK

－10－

HEADPHONE PCB ASSY


9A09758160 HEADPHONE PCB ASSY 9A09758200 HEADPHONE PCB 9A09758500 HEADPHONE JACK HOLDER

7D11-12 9A09589500 DIODE,IN4148 7K1 9A06535000 HEAD PHONE JACK 7R75-76 £ 9A09758300 R,2W 470 J

SP SEL PCB ASSY


9A09758660 SP SEL PCB ASSY 9A09758700 SP SEL PCB

SWA-B 9A09758800 SP SELECTOR SW

SP JACK PCB ASSY


9A09759060 SP JACK PCB ASSY 9A09759100 SP JACK PCB 9A09759200 SP JACK

POWER PCB ASSY


9A09756560 POWER PCB ASSY 9A09756600 POWER PCB 9A06896100 FUSE CLIP

C1-3 £ 9A09587200 C,275V 0.01UF K

FU1 £ 9A06534900 FUSE,2A 125V SLOW BLOWFU2 £ 9A09753200 FUSE,6.3A 250V SLOW BLOWFU3 £ 9A09756800 FUSE,3.15A 250V SLOW BLOWL1 £ 9A09756700 COIL,TOROID

－11－

4 52 31

C

B

A

SCHEMATIC DIAGRAM AG-790 MAIN PCB (1/2)

1 st Issue; March 2003

4C1622

4C1522

+9V

1I/O

1

1O/I

2

2O/I

3

2I/O

4

2C5

3C6

VSS

73I

/O8

3O/I

9

4O/I

10

4I/O

11

4C12

1C13

VD

D14

3N2CD4066

1234

1XS5

1231XS6

3C34104

3C32152

3C28103

3C26473

3C384U7/50V

3C3647U/16V

3C30

0.47

U/5

0V

3C202U2/50V

SW-O

UT

33

R-T

O-I

32

T1

31

T2

30

T3

29

R-T

O-O

28

R-V

RIN

27

LD

126

LD

225

A-G

ND

24

VR

-OU

T23

PVR-IN 22

R-FOUT 21

R-ROUT 20

VDD 19

STB 18

DATA 17

CK 16

GND 15

L-ROUT 14

L-FOUT 13

FVR-IN 12

VR

-OU

T11

A-G

ND

10

LD

29

LD

18

L-V

RIN

7

L-T

O-O

6

T3

5

T2

4

T1

3

L-T

O-I

2

SW-O

UT

1

L-IN444

L-IN343

L-IN242

L-IN141

VSS40

VREF39

VCC38

R-IN137

R-IN236

R-IN335

R-IN434

3N1TC9421

+12

-12V -12V

3R23470

3C112U2/50V

4R12180K

4R4390

4R18 1004C20

47U/16V

4N1-24558D

4N1-14558D

5C647U/16V

5C547U/16V

5R10100

5R9100

5R847K

5R747K

5R21K

5R11K

3C1471

3C2471

3C3471

3C4471

3C6471

3C7471

3C8471

3R8 1K

3R7 1K

3R6 1K

3R5 1K

3R4 1K

3R3 1K3R2 1K

3R1 1K

4R141k

CD/L

PHONO/R

CD/R

PHONO/L

REC/L

AUX/L

AUX/R

TAPE/L

REC/R

TAPE/R

4R1470

4R2470

4R522K

4R622K

4C1471

4C2471

4C3181

4C4181

4C5181

4C6181

4C9102

4C10102

4C13223

4C14223

4C11562

4C12562

4R9 12K

4R10 12K

4R7270

4R8270

4C747U/16V

4C172U2/50V

4C18

2U2/

50V

4C1947U/16V

4C847U/16V

4R131k

5C3101

5C4101

3R9 47K

3R10 47K

3R11 47K

3R12 47K

3R13 47K

3R14 47K

5N1-14558D

5N1-24558D

4R17100

4R3390

4R11180K

3C122U2/50V

3C142U2/50V

3C42100U/16V

3C152U2/50V

3C47

100U

/16V

3C46104

+12

3C132U2/50V

3C162U2/50V

3C232U2/50V

3C242U2/50V

3C182U2/50V

3C4147U

3C172U2/50V

3C192U2/50V

3R161k

3R151k

3R191K

3R201K

3R182K2

3R21100

4R1533K

4R1633K

3C43104

1231XS1

3V22SC2878

3V12SC2878

3R172K2

5R347k

5R447k

5R615k

5R515k

3C290.47U/50V 3C35

47U/16V

3C374U7/50V

3C394U7/50V

3C404U7/50V

5C147U/16V

5C247U/16V

3C25473

3C27103

3C31152

3C33104

3C212U2/50V

3C222U2/50V

MU

TE

TA

PE

/TA

PE

6

5

7

4

12

3

8

1

3

2

4

5

67

8

TUNER IN

R L

3R22100

+9V

3C44100U/16V

3C45104

3C5471

3R2422k

3R2522K

3D16V8

3R28 100K

3R26100K

3R27 100K

3R30100K

3R29100K

3R31 100K

3R33100K

3R32 100K

3R34 100K

3R36 100K

3R35100K

3R37100K

3R3947K

3R3847K

L-1

R-1

AM/FM Stereo ReceiverAAGG--779900

4 52 31

C

B

A

SCHEMATIC DIAGRAM AG-790 MAIN PCB (2/2), HEADPHONE PCB, SP SEL PCB, SP JACK PCB, POWER PCB

7C3110P

7C3010P

S27R7810/2W

7R7710/2W

7V255401

S1PO

WE

R S

W

C1

103/

250V

FU26.3A/250V

1C15

6800

U/7

0V

1R3

15K

1C14

6800

U/7

0V

1R215K

1D101N5404

1D111N5404

1D121N5404

1D91N5404

7C22104

7C28

47U

/63V

1D15

4004

1D18 4004

1D144148

7R6910K

7R70

100

7R7347K

7R74

47K

1C1310U/63V

1R5 22K

7C27220U/16V

7C26220U/16V

1D13

4148

7R7210K

7C254U7/63V

7C23102

7R6356K

7R5922K

7V298050D

7V288050D

7V278050D

7V268050D

7C21

104

7R62

5.1/

2W7R

6022

K

7R61

5.1/

2W

7R71

10K

7C1747U/25V

7R511K

7R1522K

7R19100

7R17100

7V15551

7R11K

7C1

4U7/

50V

7R53K3

7R73K3

7R253K3/0.5W

7R29220

7C5

47U

/63V

7V35551

7R9100

7R11100

7R1322K

7V95401

7V15669A

7V195200

7V211943

7V17649A

7V135551

7V1155517V5

54017V7

5401

7C9104

7C1330P

7R313K3

7R331K5

7VR1300

7C1530P

7R35

220

7R213K3 7R23

3K3

7C747U/63V

7C11104

7R27

3K3/

0.5W 7R49

33K

7R37220

7R3933

7R43

0.33

/5W

7R45

0.33

/5W

7R47100

7R41100

7V235551

7R53

3K3

7R55

27K

7C194U7/50V

7L11.5uH

7L21.5uH

7C204U7/50V

7R56

27K

7R54

3K3

7V245551

7R42100

7R48100

7R46

0.33

/5W

7R44

0.33

/5W

7R4033

7R38220

7R5033K

7R28

3K3/

0.5W7C12

104

7C847U/63V

7R243K3

7R223K3

7R36

220

7C1630P

7VR2300

7R341K5

7R323K3

7C1430P7C10

104

7V85401

7V65401

7V125551

7V145551

7V18649A

7V221943

7V205200

7V16669A

7V105401

7R1422K

7R12100

7R10100

7V45551

7C6

47U

/63V

7R30220

7R263K3/0.5W

7R83K3

7R63K3

7C2

4U7/

50V

7R21K

7V25551

7R18100

7R20100

7R1622K

7R521K

7C1847U/25V

7R433K

7C4

100P

7C3

100P

7R333K

7C24

10U

/63V

7R672K7

7R68

3K3/

1W

7R64

510K

7D84148

7R65220K

7R66

4K7

1XS1

1XS2

1D31N4004

1D41N4004

1D21N4004

1D11N4004

1C1

100U

/35V

1R1100

1XS3

1D51N4004

1D81N4004

1D61N4004

1D71N4004

1C4

2200

U/2

5V

1C5

2200

U/2

5V

1N378M05

1N1

7812

1N2

7912 1C10

1000

U/1

6V

1C11

1000

U/1

6V

1C3

470U

/16V

1D16

4004

1D17

40041R

42K

2

1C12

100U

/25V

RELD

1FU16.3A/250V

1FU26.3A/250V

7D730V

7D124V

7D3

24V

7D224V

7D4

24V

7D1012V

7R5718K

7D54148

7D64148

7R5818K

12

1XP12

12

1XP13+12

-12V

AC 120V/230V

SEL.SWVOLTAGE

+5VG

123

1XP7

123

1XS7

SWB

SWA

RELARELB

1873245 7K17R75 680

7R76 680

1X1Speakers out

7C29103

RELC

ON

OF

F

ON

OF

F

7D114148

7D124148

R

LG

LR

1 2 3 4

1XS8

B C A V

1 2 3 4

1XP8

VACB

OFF OFF OFF ONONON

R

LG

1 2 3 4 5 6 7

1XS9

1 2 3 4 5 6 7

1XP9

AL

+A

R+

BL

+B

R+

AL

-

AR

-G

AL

+

BL

+

AR

+

BR

+

AL

-

BL

-

AR

-

BR

-A

L+

AR

+B

L+

BR

+A

L-

AR

-G

L R RL

L1-1

L1-2

C3103/250V

C2103/250V

AC JACK OUT

FU3

3.15

A/2

50V

1N4

7809

+9

+12VG

1 2 3 4 5 6 7

1XS4P

OW

2.1V

-24V

0V 2.1V

DG

ND

+5V

1D19

1N41

48

1D20

1N41

48

1D22

1N41

48

1D21

1N41

48

1C18

100U

/16V

1C19

220U

/16V

1FU3 2A/250V

1FU4 2A/250V

RL

FU12.5A/250V

1D2324V/1W

R-1

L-1

1 st Issue; March 2003AM/FM Stereo Receiver

AAGG--779900

4 52 31

C

B

A

SCHEMATIC DIAGRAM AG-790 TUNER PCB

1234

1XS14

2L3 3.5T

2L2 4.5T

2X1

2T5

2C5152

*2R12 1K

2C37

100U

/10V

2C28203

2L4102

2C20203

2D1IN4148

2L5221

2C43203

2C38100U/10V

1 2

1XS13

2C45203

2C24102

2R202K

2R21 2K

2R22 2K

2G44.5M 2R23

2K4

2C4130

2C4230

2C44103

2R171K

2C403U3/50V

2V5C1815GR

2V4

C18

15G

R

2C46203 2C

4710

0U/1

6V2C

3947

U/1

6V

2R18

1K

2R198K2

1 2 3 1XS10

12

1XS12

XT1

XTN2

PERIOD3

CLOCK4

DATA5

OT-16

OT-27

OT-38

OT-49

I/O-510 I/O-6 11

VDD 12

AMIN 13

FMIN 14

GND 15

IFIN2 16

I/O-8 17

I/O-7 18

DO1 19

DO220

2N2TC9257F

2C16 203

*2TC12/7

2VD1V104

2VD3V149B

2C26

104

2C27104

2R11

3K3

2C361U/50V

2R133K3

2C354U7/50V

2C19102

2C22102

2C23102

2C21102

2R15300K

2R142K

2R9100K

2C10 501

2C15203

2C920

2R108K2

2R6 100K 2C13

203

2C4*7

2C6152

2R3 3K3

2R53K3

2C122032C8

1522C25104

2R4100

2R8100K

2C14203

2R7100K

2C7

152

2R1622K

2C34

220U

/10V

2C334U7/50V

2C324U7/50V

2C17682

2C18 682

2C3122U/16V

2G1 L10.7M2G2 450B

2R1 330

2C29

U1/

50V

2C330

2C2332C1

30 2L1

3.5T

2R2

330

2T3

2T2

2C11103

2VD

2V

104

2V1K161GR

2TC22/7 2T1

2VD4V149B

2V39014C

2V2 9018H

RFGND1

RFIN2

AMLCUT3

MIXOUT4

VCC5

AMIF6

FMIF7

GND8

AGC9

QUOD10

ROUT11

LOUT12 LPF2 13

LPF1 14

DETIN 15

DETO 16

IFREQ 17

ST 18

OSCO 19

AMOSC 20

FMOSC 21

AMRF22

RFVCC 23

FMRF 24

2N1TA2149N

2C51153

2C49153

2C48153

2C50153

2T4

2C52

203

LOOP75FM AM

RGL

+12V

G

+5V

G

DATA

CLOCK

PERIOD

ST

2C53 18

2T2

2G3

L10

.7M

2V99018H

2R29 300K

2R30 330

2R31 330

2C5422

2R32 15

2D2 IN4148

2C5547


AAGG--779900

4 52 31

C

B

A

SCHEMATIC DIAGRAM AG-790 FRONT PCB

INSTRUCTIONS FOR SERVICE PERSONNELBEFORE RETURNING APPLIANCE TO THE CUSTOMER, MAKE LEAKAGE-CURRENT OR RESISTANCE MEASUREMENTS TO DETERMINE THAT EXPOSEDPARTS ARE ACCEPTABLY INSULATED FROM THE SUPPLY CIRCUIT.

12345678910111213

14

15

16

17

18

19

20

21

22

23

24

25

26

27 28 29 30 31 32 33 34 35 36 37 38 39

40

41

42

43

44

45

46

47

48

49

50

51

52

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41

8R2756k

OSC

LED1STANDBY

LED3LOUDNESS

LED2MUTING

8R2560

8R28560

8R29560

G1

G2

G3

G4

G5G6G7G8G9G10G11

S1

S2

S3

S4

S5

S6

S7

S8

S9

S10

S11

S12

KEY1KEY2KEY3KEY4VDD

VDD

VDD

2.1V

2.1V

+5V

-24V

VEE

VSS

LED1

LED2

LED3

LED4

LED5

STB CLK IC DIN DOUT

SW4

BAND

SW5

FM MODE

SW6

MEMORY

SW7

AUX

SW8

TAPE M

SW3

UP

SW2

DOWN

SW1

TUNING MODE

SW13

LOUDNESS

SW11

CD

SW10

PHONO

SW9

TUNER

SW12

SLEEP

SW14

BASS

SW16

BALANCE

SW15

TREBLE

8D31N4148

8D41N4148

8D51N4148

8D61N4148

8D71N4148

8R21 10K

8R22 10K

+5VPOW

DGND

0V8R110K

8C2100U/25V

8C3100U/35V

8D21N4148

8C1470U/16V

8R26

10K

8R25

10K

8R24

10K

8R23

10K

V F D

8C6104

S13 S14 S15 S16

1

2

3

4

5

6

7

8

9

10

11

12

13

14 15

16

17

18

19

20

21

22

23

24

25

26

27

28

+5V

8C410U/16V

REMOTE

VOLUME

+5V

8R2010K

8C830

8C730+5V

8R19 100k

8C5104

8G14.433MHz

1

2

3

45

6

7

8

DATACLOCKPERIODST LED

STBDATACK

TAPEMUTE

PA1

PA2

PA3 PA4

PA5

PA6

PA7PA0

PB0

PB1

PB2

PB3

PB4

PB5 PB6

PB7

PC0

PC1 PC2

PC3

PC4

PC5VSS

INT

RES

VDD

OSC1

OSC2

SDA

SCL

24C02

8R17 1k

8R16 1k

8R15 1k

8R14 1k

8R13 1k

8R12 1k

8R11 1k

8R10 1k

8R8 1k

8R7 1k

1

2

3

8R3330

8R410K

8R510K

37

36

35

34

33

323130292827

45

44

43

42

41

40

39

34

35

38

37

36

30313233

8

9

6

5

/TAPE

8V12SA1015

8R1810K

1234567

1XP4

8TR1

5

6

7

8

9

8N1

8N2

8N3

8VR1

1234

1XP14

123

1XP5

123

1XP6

SENSOR

HT

48R

50A

-1

PT6311

8D15V1

8R312R2

8R302R2

8R32 3k9

8R33100

8C9104


AAGG--779900NOTES:£Parts marked with this sign are safety critical components.They must always be replaced with identical components-refer to the appropriate parts list and ensure exact replacement.