04_trobleshooting_E.pdf

4-1

4. Troubleshooting

4. Troubleshooting

4-1. First Checklist for TroubleshootingCheck the various cable connections first. - Check to see if there is a burnt or damaged cable. - Check to see if there is a disconnected cable connection or a connection is too loose. - Check to see if the cables are connected according to the connection diagram.

Check the power input to the Main Board.

Check the following circuits. No raster appears: Function PBA, Main PBA, I/P PBA 55V develop but no screen: Main PBA 5V does not develop: I/P PBA

Check the voltage in and out between the IP Main Board, between the IP Panel, and between the Main LVDS Boards.

1.

2.

3.

4.

4-2

4. Troubleshooting

4-2. No Power

Symptom Though the power swtich on, the LED power off and the screen is blank.-

Major checkpoints

Check Power cable.Check whether the Lamp connector is connected correctly to the IP.Check whether the power cable is connected correctly to the MAIN. Check whether the Function cable is connected correctly to the MAIN.

----

Diagnostics

IC1013

Main Board Front

IC1005

Yes

NoDoes Power indicator LED Off ? Check a connection a power cable.

Yes

NoDoes proper DC 14.5V appear at C1002. Change a Assy PCB Power.

Yes

NoDoes proper DC5V appear at C1004? Change a Assy PCB Power.

Yes

NoDoes proper DC3.3V, 1.2v appear at 1112, C1052?

Check IC1013, IC1005.Change a main PBA.

NoA power is supplied to set? Check a other function.(No picture part) Replace a lcd panel.

Caution Make sure to disconnect the power before working on the IP board.

4-3

4. Troubleshooting

4-2-1. Circuit diagrams when the power does not turn on

4-4

4. Troubleshooting

4-3. No Video (Analog PC)

Symptom Though the LED power turns on, the screen is blank when connecting the VGA cable.-

Major checkpoints

Even though the LED power turns on, the screen is blank when connecting the VGA cable.Check the D-sub cable connections.Check whether the LVDS cable is connected correctly to the panel.Check whether the lamp connector of the panel is connected correctly to the IP board.

----

Diagnostics

Main Board Front

IC5002

RA5008~ RA5012

Yes

NoCheck a PC source and checkthe connection of DSUB cable?

Input a analog PC signal andconnected cable(DPMS).

Yes

No Does the sigmal appear at R3020, R3021,R3022?

PC cable. Change a PCcable. Change a main PCB assy.

Yes

NoDoes the digital data appear at the output of RA5008~RA5012?

Check IC5002.Change a main PBA.

NoCheck a LVDS cable?Replace a lcd panel? Please, Call to Samsung Co. LTD.

Yes

Power Indicator is off.Lamp on, no video.


4-5

4. Troubleshooting

4-3-1. Circuit diagrams and waveforms (Analog) when no screen is displayed on the monitor

4-6

4. Troubleshooting

4-3-2. Waveforms when no screen is displayed (Analog PC) R,G,B Output Signal of IC5002

4-7

4. Troubleshooting

4-4. No Video (Digital-HDMI)

Symptom The LED power turns on but the screen is blank when the DVI cable or HDMI cable is connected.-

Major checkpoints

Even though the LED power turns on, the screen is blank when connecting the DVI cable or HDMI cable.Check the DVI cable or HDMI cable connections.Check whether the LVDS cable is connected correctly to the panel.Check whether the lamp connector of the panel is connected correctly to the IP board.

-

---

Diagnostics

Main Board Front

IC5002

Yes

NoCheck the connectionof HDMI cable? Input a HDMI cable.

Yes

No Does the digital data appear at D3006~D3013 ( HDMI1)?

Check HDMI cable.Change the cable.

NoDoes the digital data appear at output of IC5002?

Check the IC5002.Change a main PBA.

Yes

Power Indicator is off.Lamp on, no video.

Yes

NoCheck a LVDS cable?Replace lcd panel? Please, Call to Samsung Co. LTD.


4-8

4. Troubleshooting

4-4-1. Circuit diagrams and waveforms (Digital-HDMI) when no screen is displayed on the monitor

4-9

4. Troubleshooting

4-4-2. Waveforms when a blank screen is displayed (Digital-HDMI) Digital Output Data of IC3250 Signal of HDMI(Data)

4-10

4. Troubleshooting

4-5. No Picture (Tuner_CVBS)

Symptom The LED power turns on but the screen is blank when the RF cable is connected.-

Major checkpoints

Even though the LED power turns on, the screen is blank when connecting the RF cable.Check the RF cable connections.Check whether the LVDS cable is connected correctly to the panel.Check whether the lamp connector of the panel is connected correctly to the IP board.

----

Diagnostics

TU6001

Main Board Front

IC5002

Yes

NoPower Indicator is off. Lamp on, no picure.

Connect the RF cable and check RF signal.

Yes

No Does the signal appear at L6001?

Check the Tuner Vcc 5V.Change a main PBA.

Yes

No Does the signal appear at #9 of TU6001?

Change a main PCB assy.

No Does the digital data appear at output of RA5008 ~RA5012?

Check a IC5002.Change a main PCB assy.

Yes

NoCheck a LVDS cable?Replacea lcd panel? Please, Call to Samsung Co. LTD.


4-11

4. Troubleshooting

4-5-1. Circuit diagrams and waveforms (Tuner_CVBS) when no screen is displayed on the monitor

4-12

4. Troubleshooting

4-5-2. Waveforms when a blank screen is displayed (Tuner_CVBS) CVBS Output Signal Tuner_CVBS Output Signal

4-13

4. Troubleshooting

4-6. No Picture (AV)

Symptom The LED power turns on but the screen is blank when the Antenna Cable is connected.-

Major checkpoints

Even though the LED power turns on, the screen is blank when connecting the Antenna Cable.Check the Antenna Cable connections.Check whether the LVDS cable is connected correctly to the panel.Check whether the lamp connector of the panel is connected correctly to the IP board.

----

Diagnostics Main Board Front

Yes

NoPower Indicator is off. Lamp on, No signal image. check antenna cable

Yes

No Does the AV signal appear at #52pin of IC5002?

check antenna cableChange a main PBA



4-14

4. Troubleshooting

4-6-1. Circuit diagrams and waveforms (AV) when no screen is displayed on the monitor

4-15

4. Troubleshooting

4-6-2. Waveforms when a blank screen is displayed (AV) CVBS Output Signal

4-16

4. Troubleshooting

4-7. No Picture (S-VIDEO)


Major checkpoints

Even though the LED power turns on, the screen is blank when connecting the Antenna Cable.Check the Antenna Cable connections.Check whether the LVDS cable is connected correctly to the panel.Check whether the lamp connector of the panel is connected correctly to the IP board.

----


Yes


Yes

No Does the S-VIDEO signal appear at #50, 51 pin of IC5002?




4-17

4. Troubleshooting

4-7-1. Circuit diagrams and waveforms (S-VIDEO) when no screen is displayed on the monitor

4-18

4. Troubleshooting

4-7-2. Waveforms when a blank screen is displayed (S-VIDEO) CVBS Output Signal

4-19

4. Troubleshooting

4-8. No Picture (Component)


Major checkpoints

Even though the LED power turns on, the screen is blank when connecting the Antenna Cable.Check the Ant enna Cable connections.Check whether the LVDS cable is connected correctly to the panel.Check whether the lamp connector of the panel is connected correctly to the IP board.

----


Yes


Yes

No Does the Component signal appear at #44, 46, 47 pin of

IC5002?




4-20

4. Troubleshooting

4-8-1. Circuit diagrams and waveforms (Component) when no screen is displayed on the monitor

4-21

4. Troubleshooting

4-8-2. Waveforms when a blank screen is displayed (Component) CVBS Output Signal

4-22

4. Troubleshooting

4-9. No Sound

Symptom The LED power turns on but the screen is blank when the DVI cable is connected.-

Major checkpoints

Even though the LED power turns on, the screen is blank when connecting the DVI cable.Check the DVI cable connections.Check whether the LVDS cable is connected correctly to the panel.Check whether the lamp connector of the panel is connected correctly to the IP board.

----

Diagnostics

IC5002 IC2005

Main Board Front

Yes

NoPicture is display, no sound. Connect a sound cable.control a volume.

Yes

No Does the signal appear at Pin #71,72,73,74,76,77,78,79 of IC5002?

Check a connection harness.

Yes

NoCheck the 3.3V of #25 IC2005. check IC2003.Change a main PBA.

No check output signal of #36,37,31,30,54,53,48,47 of IC2005

check IC2005.

Yes

Replace the speaker assy?


4-23

4. Troubleshooting

4-9-1. Circuit diagrams and waveforms (No Sound) when no screen is displayed on the monitor

21

R500

9

21

R5013_DE

21

R5015_DE

21

R5014_DE

8 6 4 2

7 5 3 1RA5030

8 6 4 2

7 5 3 1RA5029

21

C507

7

8 6 4 2

7 5 3 1

RA5028

21

R5067

21R5074

21R5081

21

C508

4

21

C507

9

21C5101

21

R506

8

21C5100

21R5076

21

C508

8

21

C508

32

1C508

2

21

C507

8

8642

7531RA5033_DE

8642

7531

RA5032

21C508

6

21C508

7

21

C508

1

9998979695949392919089888786858483828180797877767574737271706968676665

6463626160595857

119

118

117

116

115

114

113

112

111

110

109

108

107

106

105

104

103

102

101

100

21C5091

21

R506

5

21C5094

21R5078

21C508

9

21

C508

5

21

C508

0

SW_P

OWER

IDEN

T_HP

IDEN

T_DV

I

IDEN

T_HD

MI2

SEL1

_HDM

I

1/16W10KOHM

100OHM

100OHM

100OHM

100OHM

100OHM

50V2.2NF

100OHM

100NF25V

1UF10V

4.7U

F10V

10KOHM1/16W

10V

4.7U

F

4.7U

F10V

10V

4.7U

F

10V

10UF

1/10W22KOHM

50V2.2NF

100OHM

2.2NF 50V

4.7U

F10V

4.7U

F10V

22KOHM 1/10W

1/10W22KOHM

100OHM

100OHM

4.7U

F10V

A3.3V

A3.3V_AU FGND

VDDC

A3.3V_VDDP

10V

4.7U

F

4.7U

F10V

100NF25V

1/10W22KOHM

A3.3V_AD

C

FGND

15 14 13 12 11 10 9 8 7 6 5 4

50V2.2NF

FGND

A3.3V_SI

F

1/10

W0OHM

SC_S

R_IN

SC_S

L_IN

MDATA

SC_S

R_OU

T2SC

_SL_

OUT2

COMP

_SR_

INCO

MP_S

L_IN

DTV_

AUDI

O_R

DTV_

AUDI

O_L

PC_S

R_IN

MDATA

MDATA

MDATA

MDATA

MDATA

MDATAMDATA

MDATAMDATA

MDATAMDATADQS1

PC_S

L_IN

MDATA(0:15)

IDEN

T_PC

IDENT_SIDE_SVH

SID

ENT_

COMP

IDEN

T_HD

MI1

HP_O

UT_L

1HP

_OUT

_R1

MDAT

A(0:

15)

AVDD_SIFSIF0PGNDCVBSOUT0CVBSOUT1AVDD_ADCVCOM0

SIF1P

GND

AUVREADN

AUVRADP

AUVREF

AVDD_AU

AUL0

AUR0

AUL1

AUR1

AUCOM

AUL2

AUR2

AUL3

AUR3

AUMONO

AUOUTL3

AUOUTR3

AUOUTL2

AUOUTR2

AUOUTL1

AUOUTR1

AUOUTL0

AUOUTR0

GPIOF[0]

GPIOF[1]

GPIOF[2]

GPIOF[3]

GPIOF[4]

GPIOF[5]

GPIOF[6]

GPIOF[7]

GPIOF[9]

VDDP

GND

VDDC

DQS[1]

MDATA[15]

MDATA[14]

GND

MDATA[13]

MDATA[12]

VDDM

MDATA[11]

MDATA[10]

MDATA[9]

MDATA[8]

GND

VDDM

MDATA[7]

MDATA[6]

MDATA[5]

MDATA[4]

VDDM

SIFM

GPIOF[8]

CLOSE TO IC

CHASSIS GND

CLOSE TO ICCLOSE TO IC

SPK_OUT

SPK_R

SPK_L

CHASSIS GND

CLOSE TO IC

CLOSE TO IC

CLOSE TO IC

CLOSE TO IC

1 SPK_R+1

SPK_R-

1

SPK_L+

1

SPK_L- 4321

CN2001

21BD2006

21BD2005

21C2

042

21

R2015

21R2014

21C2018

21C2019

21R2016

21

C201

5

21

C201

6

21

C201

4

21 R2017

21

C201

7

21 C2013

21C2012

2 1C2011

21

D200

6

21 C2008 21

C200

42

1

C2003

21BD2001

21

C200

5

21

D200

7

21 C2002 21 R2003

4 321

L200

1

21C2001

21R2002

21 C2039 21 R2006

21

C207

6

21

C207

8

21

R200

5

21

C204

1

21BD2003

21 C2079

21

C208

0

21R2001

21

C207

5

21

C207

7

21

R200

4

21C2

040

21BD2002

21C2006

21 C2007

21

C200

9

21C2

010

21

C2038

2 1BD2004

21D2

008

21 C2036

21 C2035 21 R2008 21 C2034 21 R2007

21

C2029

21

R201

0

21

C203

1

21

C203

0

21

R200

9

21BD2008

21C2

027

21C2

028

21BD2007

21

C208

2

21C2

083

21C2

081

21C2

043

21C2

023

2 1D2009

MGND19876

56 55 54 53 52 51 50

5

49 48 47 46 45 44 43

424140

4 39383736353433323130

3

29

282726252423222120

2

1918171615

1413121110

1

IC2005

21

C20242 1

R2013

21 C2025 21R2012 21 C2026 21 R2011

21

C2037

4 321

L200

2

21

C203

3

21

C203

2100N

F50V

50V

470N

F

DDA-

0808

100NF 25V

4.7OHM 1/10W1NF 50V4.7OHM 1/10W1NF 50V

1/10W0OHM

50V22NF

NTP-3000

75VLL4148

10V

1UF

25V

100N

F

33PF

50V

33PF

50VB1.8V_AMP

25V

100N

F

BEAD_CHIP

1NF50V

50V

1NF

BEAD_CHIP

4.7KOHM

1/10

W

100NF50V

100N

F50V

4.7KOHM

1/10

W

100NF50V

4.7OHM1/10W1NF 50V1/10W4.7OHM1NF 50V

25V100NF

75V

LL41

48

BEAD_CHIP

220UF35V

22NF

50V

10V

1UF

1UF 10V

22NF 50V

BEAD_CHIP50V

1NF

1/10

W4.

7KOH

M50V

100N

F

50V

100N

F

4.7OHM 1/10W

50V

470N

F

50V1NF

BEAD_CHIP

50V

1NF5

0V10

0NF

100N

F50V

B12VS1/10W4.7OHM1NF 50V

4.7OHM 1/10W1NF 50V

DDA-

0808

1/10W4.7OHM50V1NF

75V

LL41

4825V

100N

F

BEAD_CHIP

B12VS

35V220UF

100N

F25V

B3.3VD

22NF 50V

75V

LL41

48

10V1UF

100PF 50V

25V100NF

100OHM 1/10W

25V

100N

F

AVDD_PLL

10UF

10VDVDD_PLL

1/10W3.3KOHM

100PF 50V

1NF 50V

1/10W100OHM

1KOHM 1/10WB1.8V_AMP

AVDD_PLL

10UF

10V

DVDD_PLLBEAD_CHIP

BEAD_CHIP

FGND

FGND

FGND

FGND

FGND

FGND

FGND

FGND

FGND

FGND

FGND

FGND

FGND

CN_S_004

AMP_MUTEAUSDAUWSAUSCK

AMP_RESETAUMCKO

SDA1SCL1

SPK_RSPK_R_SPK_LSPK_L_

SPK_LSPK_L_

SPK_RSPK_R_

4.7K

OHM

1/10

W

25V

100N

F

10UF10V

CLK_CLK_VSS_AD/RESETVDR1ABST1A P

GND1

APG

ND1A

OUT1

AOU

T1A

PVDD

1APV

DD1A

PVDD

1BPV

DD1B

OUT1

BOU

T1B

PGND

1BPG

ND1B

BST1

BVD

R1B

NCVDR2ABST2A

PGND2APGND2AOUT2AOUT2A

PVDD2APVDD2APVDD2BPVDD2BOUT2BOUT2B

PGND2B

PGND

2BBS

T2B

VDR2

BSO

FT_R

ESET

_2PW

M_MA

SK_2

AUX_

PWM3

AAU

X_PW

M3B

SCL

SDA

BCK

WCK

SDAT

ADV

DDDVSS

TEST0DVDDPLLAVDDPLLLFMAGNDPLLDGNDPLLVDD_

4-24

4. Troubleshooting

4-9-1. Waveforms when a blank screen is displayed (No Sound)

The Signal are Inputed to IC5002 DC 3.3V

4-25

4. Troubleshooting

4-10. Faults and Corrective ActionsFault Photo Symptoms and Corrective Actions Remarks

Symptoms: DVI signals are not recognized.

Causes: This fault occurs when the PC does not recognize the mode information because the DVI DDC has not been input to the monitor.

Corrective Actions: Input the DVI DDC to the monitor.

* Refer to the Training Manual for information on inputting the DVI DDC.

Symptoms: When the monitor is turned on, only a full white pattern is displayed continually regardless of the signals.

Causes: This fault occurs when only the lamp power is supplied and no video signals are input to the panel due to a fault or incorrect connections of the LVDS cable.

Corrective Actions: Replace or reconnect the LVDS cable correctly so that video signals can be supplied to the panel.

* A full white pattern is a feature of the TN panel and is displayed when no

video signals are supplied.

Symptoms: When connecting the DVD, noise occurs on the screen.

Causes: The HDCP key is not inserted.

Corrective Actions: Enter the HDCP key. (See page 4-17.)

4-26

4. Troubleshooting

4-11. Adjustment

4-11-1. Service Instruction1. Usually, a color TV-VCR needs only slight touch-up adjustment upon installation.

Check the basic characteristics such as height, horizontal and vertical sync.2. Use the specified test equipment or its equivalent.3. Correct impedance matching is essential.4. Avoid overload. Excessive signal from a sweep generator might overload the front-end

of the TV. When inserting signal markers, do not allow the marker generator to distort test result.5. Connect the TV only to an AC power source with voltage and frequency as specified on the backcover nameplate.6. Do not attempt to connect or disconnect any wire while the TV is turned on. Make sure that the power cord is

disconnected before replacing any parts.7. To protect aganist shock hazard, use an isolation transform.

4-12. How to Access Service Mode

4-12-1. Entering Factory Mode2. To enter Service Mode Press the remote -control keys in this sequence :

- If you do not have Factory remote - control

MUTEPower OFF 1 8 Power ON2 - If you have Factory remote - control

PICTURE ON INFO FACTORY

- The buttons are active in the service mode.1. Remote - Control Key : Power, Arrow Up, Arrow Down, Arrow Left Arrow Right, Menu, Enter, Number Key(0~9)2. Function - Control Key : Power, CH +, CH -, VOL +, VOL -, Menu, TV/VIDEO(Enter)

4-27

4. Troubleshooting

4-13. Service Adjustment

4-13-1. White Balance - CalibrationIf picture color is wrong, do calibration first.

Equipment : CA210, Patten : chess patternExecute calibration in Factory Mode Source PC : 1024*768/60Hz

(Gray patten)

4-13-2. White Balance - AdjustmentIf picture color is wrong, check White Balance condition.

Equipment : CA210, Patten : ToshibaAdjust W/B in Factory Mode

Sub brightness and R/G/B Offset controls low light regionSub contrast and R/G/B Gain controls high light regionSource AV : PAL composite, Component : 1280*720/60Hz

HDMI[DVI] : 1280*720/60Hz

[ Test Pattern : MSPG-945 Series Pattern #16 ]

*Color temperature 1500K +/-500, -6 ~-20 MPCD

*Color coordinate H/L : 272/278 +/- 2 35.0 Ft +/- 2.0Ft L/L : 272/278 +/- 3 1.5 Ft +/- 0.2Ft

Toshiba Patten

4-13-3. Conditions for Measurement1. On the basis of toshiba ABL pattern : High Light level (57 IRE)

- INPUT SIGNAL GENERATOR : MSPG-925LTH* Mode NO 2 : 744X484@60 Hz

NO 6 : 1280X720@60 Hz NO 21 : 1024X768@60 Hz

* Pattern NO 36 : 16 Color Pattern NO 16 : Toshiba ABL Pattern2. Optical measuring device : CA210 (FL)Please use the MSPG-925 LTH generator for model LE26M51B/LE32M51B/LE40M51B/LE46M51B.

4-28

4. Troubleshooting

4-13-4. Method of Adjustment1. Adjust the white balance of AV, Component Modes.

(AVComponent) a) Set the input to the mode in which the adjustment will be made.

(RFDTVPCDVI).* Input signal - VIDEO Mode : Model #2 (744*484 Mode), Pattern #16

- DTV,DVI Mode : Model #6 (1280*720 Mode), Pattern #16 - HDMI Mode: Model #6(1280*720 Mode), Pattern #16

b) Enter factory color control, confirm the data.

c) Adjust the low light. (Refer to table 1, 2 in adjustment position by mode) - Adjust sub - Brightness to set the Y value. - Adjust red offset (x) and blue offset (y) to the color coordinates.

Low light Measurement point

Picture 4-2 Toshiba ABL Pattern

* Do not adjust green offset data. d) Adjust the high light. (Refer to table 1, 2 in adjustment position by mode)

- Adjust red gain (x) and blue gain (y) to the color coordinates.* Do not adjust the green gain and sub-contrast (Y) data. d) Adjust the high light. (Refer to table 1, 2 in adjustment position by mode)

- Adjust red gain (x) and blue gain (y) to the color coordinates.* Do not adjust the green gain and sub-contrast (Y) data.

Low light Measurement point

Picture 4-3 Toshiba ABL Pattern

4-29

4. Troubleshooting

4-14. Software Upgrade

4-14-1. How to Update Flash ROM1. Install the Flash Downloader

Connector Set(D-SUB) and D-SUB cable to execute Program Update.

2. Flash Downloader program update - Turn on the TV Set - Click Connect icon on the MSTAR tool. - Click Read, and Choose a new S/W. - Click Auto, and Run

4-30

4. Troubleshooting

Memo

4. Troubleshooting4-1. First Checklist for Troubleshooting4-2. No Power4-3. No Video (Analog PC)4-4. No Video (Digital-HDMI)4-5. No Picture (Tuner_CVBS)4-6. No Picture (AV)4-7. No Picture (S-VIDEO)4-8. No Picture (Component)4-9. No Sound4-10. Faults and Corrective Actions4-11. Adjustment4-12. How to Access Service Mode4-13. Service Adjustment4-14. Software Upgrade

04_trobleshooting_E.pdf

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Transcript of 04_trobleshooting_E.pdf