Manual Reparacion Pdp42

8/2/2019 Manual Reparacion Pdp42

1/52

anua eparac n a

nivel componente (Troubleshooting)

. .

.

1


2/52

- 2 -


3/52

Caractersticas circuitos DriverCaractersticas circuitos Driver

Descripcin por mdulosDescripcin por mdulos

.SMPS(Fuente a alimentacin)

Es la encargada de proveer tensin y corriente a todos los circuitos.

.

Encargada de dar las seales provenientes de la placa lgica travs de los switch FETs

a los electrdos X.

.PLACA Y Main

Encargada de dar las seales provenientes de la placa lgica travs de los switch FETs

a los electrdos Y..LOGIC MAIN BOARD

Encargada de procesar la seal de la imagen que ser mostrada en la pantalla creandolas seales para las placas X-Y Main

- 3 -


4/52

Descripcin por mdulosDescripcin por mdulos

.LOGIC BUFFER(E,F,G)

La seal proveniente de la placa lgica es guardada y pasa a los ICs de.

.Y-BUFFER (Upper,Lower)

Circuitos encargados de dar al panel de PDP los direccionamientosY provenientesde la placa lgica, consisten en dos placas. (upper y lower board).

.AC Noise Filter

Filtro para prevenir los ruidos de baja frecuencia que provienen de la red elctrica.

.COF (Chip on Flexible)

Son ICs montados en el conector flexible del panel y encargados de dar los

- 4 -

direccionamientos correctamente a los electrdos del panel. (STV7610A :96 Pin)


5/52

42"s1.0 (PAL PDP)

1. Outline of troubleshooting

Contents

2. Troubleshooting procedure according to defect.

2-1. No-Power

2-2. No-Video

- .

2-4. Sustain Open2-5. Sustain Short

2-6. Abnormal Sustain

2-7. Address Open

2-7-1. R_Data Address Open

2-7-2. G_Data Address Open2-7-3. _ ata ress pen

2-7-4. Block Address Open

2-8. Address Short

-

- 5 -


6/52

1. Outline of Troubleshooting This chart contains abnormal conditions happened PBA of 42" module (PAL)

on on ame escr p on e a e oar

No-power Operating Voltages don't exit AC FILTER, SMPS No-video Operating Voltages exit, but an image doesn't exist Y-MAIN, X-MAIN, Main-Logic

Abnormal video Abnormal image is on Video(except abnormality in sustain or address)

Y-MAIN, X-MAIN, Main-Logic

Sustain Open some horizontal lines don't exist on Video Y-Buffer, X, Y FPC Sustain Short some horizontal lines appear to be linked on Video Y-Buffer, X, Y FPC Abnormal Sustain Abnormal condition on horizontal lines

(except abnormality of Sustain Open or Short)Y-MAIN, Y-Buffer

Address Open some vertical lines don't exist on Video Main-Logic, Logic buffer, FPC, COF Address Short some vertical lines appear to be linked on Video Main-Logic, Logic buffer, FPC, COF Abnormal Address Abnormal condition on vertical lines Main-Logic, Logic buffer, FPC, COF

You should learn PBA analysis manual to be familiar with PBA specification andoutput waveform, before you learn Troubleshooting.

- 6 -


7/52

Factores necesarios para el funcionamiento-Alimentaciones

Vs : 85V - Sustain

~ -

Ve : 110V - Ve bias (Vb in P4)

Vscan : 70V ~ 80V - Scan bias

Vdd : 3.3V - Logic signal buffer IC

Vcc : 15V - FET Gate drive IC

- 7 -

Logic Signal - Suministrada por la placa lgica


8/52

Troubleshootin fuente de alimentacinTroubleshootin fuente de alimentacin

Power ONComprobar cable

STB_5V NG Comprobar IC2,D28

OK

OK

PFC Comprobar IC1,Q1,Q2

OK OK

PFC

OK OKNG IC35Comprobar

PFC NG IC7Comprobar

- 8 -


9/52

Troubleshooting fuente de alimentacinTroubleshooting fuente de alimentacin

VS NGVS ,

OK

VscanVE,Vset IC16, IC17, IC18Comprobar

OK

Comprobar otra placa ( Placa de imagen o Placa Driver ) O el cable

- 9 -


10/52

2. Troubleshooting Procedure in abnormal conditions

2.1 No-power ( Operating Voltages don't exist )

AC Power CordNG connect

OK

AC Noise

Filter

Check CN8702/2pin

connector(220Vac)

NG AC Noise

Filter

Fuse(F8701,8702) is open?

If fuse is opened, replace Fuse

Choke(L8704) is miss-oriented?

OK

SMPS

Check CON8002/2pin

connector (220Vac)

NG AC Cable is open?

If fuse is opened, replace Fuse

OK

- 10 -

continued


11/52

- '

SMPS

.

NGON/OFF Relay(RLY8001, 8002) act?

LED(Green)

8001,8002,8003 act?

NGreplace SMPS

OK

NGSMPS

ec 5 5 c rep ace

OK

NGVa

Open Logic Buffer

connector (LP1/5pin)

Check OVP,OCP

NGSMPS

put out LED8004(RED)

Protection?

Protection failure

SMPS (Shutdown)

Check(Vs,Va,V5(D)

V5Open Logic main

connector (LD1/4pin)

Check OVP,OCP

Replace the

Board and

Re-check

NG

OKVs

Open Y-Main connector

(CN5008/13pin)

Check OVP,OCP

Check SMPS output NG

Vs

Open X-Main connector

(CN4004/13pin) Open

Check OVP,OCP

- 11 -

Voltages


12/52

2.2 No Video (Operating Voltages exist, but an image doesn't exist on Video)

This abnormal condition is related with Y-main, X-main, Logic Main and so on.

,

the causes of failure in each board.

No-Vodeo

[ Logic Main ] [ Y-MAIN ] [ X-MAIN ]

LED(2000) Sink Signal

blinks?

Check Scan Buffer

output waveform

Y-buffer's Out34

Check X-out 1, 2

waveform

- 12 -


13/52


[ Y-MAIN ]

Check waveform of

Y-Buffer Output 3, 4

In checking input or output pins,Check "No-solder/Cold solder/Lead bent" on the Connector Leader.

CN5406,5506(13pin) NG

IC5005 /7404

Check out-signal

pin(2.4.6.8.10.12)

IC5006.5007/LV244

Check out-signal

pin(3.5.7.9.12.14.16.18)

CN5002/Con_30pin

Check out-signal

pin(2.4.5.8.9.12)

OK OKY-Buffer

Check STV7617

Logic Signal.

NGY-MAIN Y-MAIN Y-MAIN

Replace IC, after

Pin Short/OpenNG

OK OK

NG NG

OK

CN5404,5405,5506,

5505(12pin) NGY-MAIN

M5003/IRF540A

Check FET/GATE waveform

OKY-MAIN

R5008/4.7

Check Vscan Voltage(75Vdc)

OKY-MAIN

_

Check Vscan Voltage(75Vdc)

of input 5 pin

-

(Out' L,H)

NGReplace FET

OK


OK OK

- 13 -

Y-MAIN

Normal state

_

Check (Yrr.Yr.Yfr.Yf.Ys.

Yg.Yp)

_

Check input signals pin

(21.22.24.25.28.29.30)

_

Check Voltages(Vdd.Vcc.Vset.Vs)

pin of input (1.3.7.11.12.13)


14/52

. o eo pera ng o ages ex s , u an mage oesn exs on eo

[ X-MAIN ]

Check X-Out 1,2

Waveform


NGS/W_FET/GATE waveform

IC4005 /74HC08

Check out-signals pin

(3.6.8.11)

OK

CN4005/Con_13pin

Check input-Logic signals

pin(2.4.6.8.10.12)

OK

CN4004/Con_12pin

Check Voltages(Vdd.Vcc.Ve.Vs)

of input-pin(1.3.5.10.11.12)

X-MAIN

NGCheck (Xrr.Xr.Xf.Xs.Xg.)

-

X-MAIN

OK -X-MAIN

Replace IC, after checkNG

OK -X-MAIN

CheckNG

Check FET

If it is failed, replace it

NG

out-Voltages &

harness(SMPS)

OK

NG

-

-

IC4007,4006,4001/IR2110S

Check input-pin(12.14)

OK

-X-MAIN

IC4007,4006,4001/IR2110S

Check output-pin(12.14)

Check pin

Open/Short

Replace IC

NG Check pin

Open/Short

Replace IC

NG

- 14 -

-

Normal state


15/52

2.2 No Video O eratin Volta es exist but an ima e doesn't exist on Video

[ Logic Main ]

LED(2000) blinks?

(action of Sink Signal)


NG

LD1 / 4pin NGSMPS

Check SMPS out-Voltages ( 5Vdc)

'LogicMain

-Check connector's

operating Voltages(5Vdc)

-Fuse open?

Fuse(FU2021,2002) open?

replace it

miss oriented / missing / wrong component

NG

Check the internal(2E00)

/external(2E01) state

on Ke scan Table

LogicMain

NGKeyscan Table Adjustment

After select 2E00(internal)/2E01(external),

Check 2081 of (F/W) pattern

OK

LogicMain

IC2037(3.3Vdc)

IC2036(2.5Vdc)

Check Regulator IC output

NG Check in-Volt (5V, 3 pin) andout-Volt(pin 2)

Replace it

- 15 -

OK


16/52


OK

Check Oscillator Output

X2002(60MHz) in3 NG Check operating NG NG Check operating of


LogicMain

X2004(40MHz) pin3

X2003(28.636MHz) pin3

NGin-Voltage

(3.3Vdc)10uH's operating

OK OK

NGIC2037/out-pin2

and pattern

ep ace e ecte

Oscillator

Replace

defected Coil

Logic

Check Generator Output

F1,F2,256K

NG Replace defectedF1,F2,256K

OK

LogicMain

Check Reset Signal

IC2004 pin58

NG Check in-voltage(3.3VdcCheck component's Open/Short

OKLo ic Main

- 16 -

Normal state


17/52

. ,

This abnormal condition is related with Y-Main, X-Main, Logic Main and so on.

This page shows you how to check the boards, and the following pages show you how

o n e causes o a ure n eac oar

[ Logic Main ][ Y-MAIN ]

[ X-MAIN ]

Check Data, Control Line's

Open/Short

Check Y-buffer Output Waveform,

Scan Output Waveform,

and, Control Signal(Open/Short)

Check Control Signal

(Open/Short)

- 17 -


18/52

2.3 Abnormal Video Abnormal ima e is on Video exce t abnormalit in Sustain or Address

[ Y-MAIN ]

Check Y-buffer Output,

Scan Output Waveform


,

IC5005 /7404

Check Out-signal

pin(2.4.6.8.10.12)

IC5006.5007/LV244

Check Out-signal

pin(3.5.7.9.12.14.16.18)

CN5002/Con_30pin

Check In-signal

pin(2.4.5.8.9.12)

Y-Buffer

CN5406,5506(13pin)

Check Logic Signal

of STV7617


Check pin

OK OK

Check PinNG NG

OKpen or

Replace IC

-

M5003 Gate NGY-MAIN

Check Scan In-Voltage

Open/Short

Replace it

Waveform

OK

.

Replace

FET(IRF540A)

NG

VR5001 5002,

Check slope Waveform

of Rising/Falling

Y-MAIN

NGAdjust the slope

OK

- 18 -

Y-MAIN

Normal state


19/52

. ,

[ X-MAIN ]

Check Control Signal


-

Check discharge state of ERC circuit

(Lead Open / Missing component RepairG C4052.4051.4050.4049)

OK

NGX-MAIN

VR4001

Check Slope Waveform

of Rising Ramp

Adjust the slope

-

OKCN4004/Con_12pin

Check In-voltage(Vdd.Vcc.Ve.Vs)NG Check operating

Voltage specof pin (1.3.5.10.11.12) Adjust

OK

- 19 -

X-MAIN

Normal state


20/52

. ,

[ Logic Main ]

Check Data,

Control Signal


Check Oscillator Output

and waveform of NG NG NG Check o eratin offrequency modulationX2002(60MHz) pin3

X2004(40MHz) pin3

X2003(28.636MHz) pin3

LogicMain

NGVoltage(3.3Vdc) of Coil 10uH

OK

Replace defected

OK

NGIC2037/out-pin2

and pattern

OK Oscillator defected CoilCheck Generator Output

F1,F2,256K

LogicMain

NG Replace defectedF1,F2,256K

OK

LogicMain

Check Generator Output

IC2001/240pin Solder

(cold solder/solder short)

RepairG

- 20 -

OK


21/52

2.3 Abnormal Video (Abnormal image is on Video, except abnormality in Sustain or Address)

OK In checking input or output pins,

Check "No-solder/Cold solder/Lead bent" on the Connector Leader.

LogicCheck Delay Controller Output

IC2002/240pinNG

Repair

OK

a nco so er so er s or

OK

LogicMain

Check Data Memory ControllerOutput

IC2005.2006.2007.2008/100pin

NGRepair

OKLogic Main

Normal State

- 21 -


22/52

'.

[ Y-FPC ]

Sustain Open


Y-FPCNGCheck FPC(80pin) Output Check FPC(80pin) connector

OKRepair /

Replace connector

NG

'

Y-Buffer

Check Connector(80pin)

Output

(CN5401.5402.5403.5501

.5502.5503)

NG (cold solder, no solder, lead bent,lead contact, foreign substance )

Repair / Replace ConnectorNG

OK

Y-Buffer

Check Scan Driver IC/ 100pin

Output

Upper(IC5401.5402.5403.5404)

NG Check Scan Driver IC/ 100pin(cold solder, solder short, lead bent)

Lower(IC5501.5502.5503.5504)

Repair / Replace ICNG

To check IC failure

-raise IC Output Lead form PCB pad and check the Output Lead

OK

- 22 -

waveform

-In case of IC failure, replace the IC.


23/52

2.4 Sustain Open (some horizontal lines don't exist on Video)

OK In checking input or output pins,Check "No-solder/Cold solder/Lead bent" on the Connector Leader.

Y-Buffer

Check PCB pattern Open/Short

between connector(80pin)'s

pattern and IC Output pattern

NGReplace Board

OK

CN5406 5506 13 in

IC5005 /HC7404

Check Out-signal

pin(2.4.6.8.10.12)

IC5006.5007/LV244

Check Out-signal pin

(3.5.7.9.12.14.16.18)

CN5002/Con_30pin

Check In-signal

pin(2.4.5.8.9.12)

Y-Buffer

,

Check Input-Logic signal

of STV7617


Check pinNG

OK OK

Check pinNG NGOKOpen/Short

Replace It

Open/Short

Replace It

[ Y-Buffer/Y-MAIN ]

Check contact state ofconnector 5406,5506 an

CN5001,5003

(pin Short/Open)

- 23 -


24/52

2.5 Sustain Short (some horizontal lines appear to be linked on Video)

[ Y-FPC ]

Sustain Short

In checking input or output pins,Check "No-solder/Cold solder" on the Connector Leader.

Y-FPCNG

Check FPC(80pin)'s Output

Check FPC(80pin) Connector

(Solder short /

OKRepair / Replace Connector

NG

Y-Buffer

Check output of

connector(80pin)

(CN5401.5402.5403.5501

.5502.5503)

NGec onnec or

(Solder short /

conductive substance)

Re air / Re lace ConnectorNG

OK

Y-Buffer

Check Scan Driver IC/ 100pin

Output

Upper(IC5401.5402.5403.5404)

NG Check Scan Driver IC/ 100pin(Solder short /conductive substance)

Lower(IC5501.5502.5503.5504)

Repair / Replace ICNG

To check IC failure

-raise IC Output Lead form PCB pad and check the Output Lead

- 24 -

waveform



25/52

[ Y-Buffer ]

Abnormal Sustain

.

In checking input or output pins,Check "No-solder/Cold solder" on the Connector Leader.

Y-Buffer

Check connector (80pin)

Output Waveform NGCheck Scan Driver IC/ 100pin Output

Upper(IC5401.5402.5403.5404)

Lower(IC5501.5502.5503.5504)

5401.5402.5403.5501

.5502.5503)

Check Input-Logic signal of

NG

Repair / Replace IC

To check IC failure : raise IC Output Lead form PCB pad and

check the Output Lead waveform


Y-Buffer

Scan Driver IC/ 100pin

Upper(IC5401.5402.5403.5404)Lower(IC5501.5502.5503.5504)

OK

NG

Check Input-Logic NG

IC5005 /7404

Check out-Signal

pin(2.4.6.8.10.12)

IC5006.5007/LV244

Check out-Signal

pin(3.5.7.9.12.14.16.18)

CN5002/Con_30pin

Check in-signal

pin(2.4.5.8.9.12)

OK OKY-Buffer

Signal of CN5406,

5506(13pin) STV7617


Check Pin

O en/Short

NG

OK OK

Check Pin

O en/Short

NG NG

- 25 -

Replace IC Replace IC


26/52

2.7 Address O en some vertical lines don't exist on Video

This abnormal condition is related with Logic Main, Logic Buffer, FPC, COF and so on.This page shows you how to check the boards, and the following pages show you how to find the causes

Address Open

.

Address Open R_Data Address Open G_Data Address Open B_Data Address Open Block Address Open

[ COF ]

Check Address Output

Signal (384LINE)

[ Logic Main / FPC ]

Check Data / Control

Output Waveform

[ Logic Buffer ]

Check Data / Control

Output Waveform

- 26 -


27/52

2.7.1 R_Data Address Open (Red Cell vertical lines don't exist on Video)

[ COF ]

Address Open


Check Address Open. NG COF Module'sCheck R_DATA Connector80pin Output

COFLine under 96 among 384

lines open?

NGFailure

OK Check Input signal pin

80pin OutputEL1 EL2

EC1_Block 75.72.67.64

EC2 Block 59.56.51.32OK

LogicBuffer

Check Output Signal pin

(16.9.)

VHCT244 (IC2602.03.08.05.

07.06.09.00.IC2700.01.05.

NG LogicBuffer

NG

(4.11) of VHCT244EC2_Block

EC3_Block 27.24.19.16

EC4_Block 11.8. 75.7202.04.03)

Check pin

Open / Short

Replace it

OK

OKFE1 EF1 EL2

FC5_Block 74.73.66.65

7.8.

15.1667.64.59.56

LogicBuffer

/80pin Output Signal

pin(13.16.49.52)

NG ec p n pen ortCheck contact and aligned state

of COF Connecting FPC

FC6_Block 58.5726.25

23.24

55.5651.32.27.24

FC7_Block 18.17.10.9

63.64

71.7219.16.11.8

OKReplace defected COF module

- 27 -


28/52

2.7.1 R_Data Address Open (Red Cell vertical lines don't exist on Video)


_ -

LE01 Output-pin Input-pin

EC1_Block 6.9.14.17

IC2031 IC2030 IC2031 IC2030

3.9.16 5 17.11.4 15

OK

EC2_Block 22.25.30.49IC2030 IC2029 IC2030 IC2029

12.18. 7.14 8.2 13.6


3.9.16 5 17.11.4 15

Check Output Signal

of Logic Main Control

EC4_BlockLE01 LE02 IC2027 IC2026 IC2025 IC2027 IC2026 IC2025

70.73 6.9 12.18. 16 5 8.2 4 15

FC5_Block14.17

22.25

IC2025 IC2024 IC2025 IC2024

12.18. 7.14 8.2 13.6

FC6_Block 30.49

54.57

IC2023 IC2022 IC2023 IC2022

3.9.16 5 17.11.4 15

FC7_Block62.65

70.73

IC2022 IC2021 IC2022 IC2021

12.18. 7.14 8.2 13.6

Check pin

Open / Short / Bent

NG

- 28 -

ep ace


29/52

2.7.2 G_Data Address Open (Green Cell vertical lines don't exist on Video)

[ COF ]

Address Open


Check G_DATA Connector

80pin OutputCheck Address Open. NGEL1 EL2

EC1_Block 74.71.66.63

EC2_Block 58.55.50.31

COFLine under 96 among 384

lines open?

NGCOF module

OK Check each In-signal

EC3_Block 26.23.18.15

EC4_Block 10.7 74.71

LogicBuffer

Check Output-signal pin

(14.7)VHCT244(IC2602.03.08.05.

07.06.09.00.IC2700.01.05.

NG LogicBuffer

NG

.

FE1 EF1 EL2

FC5_Block75.70.

67.62

6.11.

14.1966.63.58.55

59.54. 22.27.

. .Check pin

Open / Short

Replace it

OK

OK

Check COF Connector / NG Check pin Open/ShortFC6_Block

27.22 54.5950.31.26.23

FC7_Block19.14.

11.6

62.67.

70.7518.15.10.7

LogicBuffer

80pin Output-signal pin

(14.17.50.53)

NGCheck contact and aligned state


OK

OKReplace defected COF

- 29 -


30/52

OK

. . _ a a ress pen reen e ver ca nes on ex s on eo


_ - ec og c a n u pu

LE01 output-pin Input-pin

EC1_Block 7.10.15.18

IC2031 IC2030 IC2031 IC2030

5.12.18 7 15.8.2 13.


14. 3.9.16 6 17.11.4


5.12.18 7 15.8.2 13.

Control Output Signal


71.74 7.10 14. 3.18 7 6. 17.2 13

FC5_Block15.18

23.26

IC2025 IC2024 IC2025 IC2024

14 3.9.16 6 17.11.4

6_ oc 31.50

55.58

IC2023 IC2022 IC2023 IC2022

5.12.18 7 15.8.2 13.

FC7_Block63.66.

71.74

IC2022 IC2021 IC2022 IC2021

14. 3.9.16 6 17.11.4

Check pin

Open / Short / Bent

NG

- 30 -


31/52

2.7.3 B_Data Address Open (Blue Cell vertical Lines don't exist on Video)

[ COF ]

Address Open


Check B_DATA Connector

80pin Output

Check Address Open.

Line under 96 among 384 NGEL1 EL2

EC1_Block 73.70.65.62

EC2_Block 57.54.49.30

COFnes openNG

Check COF's failure

OK Check input pin VHCT244

EC3_Block 25.22.17.14

EC4_Block 9.6 73.70

LogicBuffer

Check out-pin(12.5)

VHCT244(IC2602.03.08.05.07.06.09.00.IC2700.01.05.

02.04.03)

NG LogicBuffer

NG

.

FE1 EF1 EL2

FC5_Block72.71.

64.63

9.10.

17.1865.62.57.54

FC6 Block 56.55. 25.26.

ec n

Short/Open

Replace IC

OK

OK

NG Check pin Open/Short _ . .24.23

. .

57.5849.30.25.22

FC7_Block16.15.

8.7

65.66.

73.7417.14.9.6

OK

LogicBuffer /80pin Out-signal pin

(15.18.51.54)

NGCheck contact and aligned state


OKReplace defected COF module

- 31 -


32/52

OK

2.7.3 B_Data Address Open (Blue Cell Vertical lines don't exist on Video)


ec _ og c- a n u pu

LE01 Output-Pin Input-Pin

EC1_Block 8.11.16.19

IC2031 IC2030 IC2031 IC2030

7.14 3.9. 13.6 17.11


16. 5.12.18 4. 15.8.2


7.14 3.9 13.6 17.11

Check Control Out-signal

of Logic-Main


72.75 8.11 16. 5 3.9 4. 15 17.11

FC5_Block16.19

24.27

IC2025 IC2024 IC2025 IC2024

16. 5.12.18 4. 15.8.2

FC6_Block 32.51

56.59

IC2023 IC2022 IC2023 IC2022

7.14 3.9 13.6 17.11

FC7_Block64.67

72.75

IC2022 IC2021 IC2022 IC2021

16. 5.12.18 4. 15.8.2

Check Pin

Short/Open/BentNG

- 32 -


33/52

. . oc ress pen Block vert ca nes ont ex st on eo

[ COF ]

Address Open

Check current R(2.2) of LogicCheck Va-input Voltage

"

Check Logic buffer/3pin


LogicBuffer

NG LogicBuffer

OK

Resister is open?

Check COF connector

/80pin

Va Out-Volt. 75Vdc in

Logic

Buffer

LP1 Connector

Logic

Buffer

OK

oriented/contact state

-Check out-voltage of SMPS

-Check Protection of SMPS

-Filter Cap of Logic Buffer

is miss-oriented?

NG(9.10.35.36.45.46.71.72)

Replace Resistor

NG

NG

OK Check Pin open/short?Check contact & aligned state

of COF connecting FPC

Check Out-signal pin(18.3)Check input-signal pin

VHCT244(IC2602.03.08.05.

07.06.09.00/IC2700.01.05.

02.04.03

Check Out-Signal Pin(14)

LogicBuffer

NG LogicBuffer

NG

(2.17) of VHCT244

, , ec n s or open

Replace IC

OK

LogicBuffer

Check Out-signal pin

of COF connector /80pin

(19.20.24~27.31.32

55.56.60~63.67.68

NG Check pin Open/ShortCheck contact and aligned state

of COF Connectin FPC

OK

- 33 -

OK Replace defected COF module


34/52

Checck Connector 80pin / IC OutputNG

2.7.4 Block Address Open (Block vertical lines don't exist on Video)


_

F Buffer E Buffer

FE1 EF1IC2604

(Output)

IC2604

(Input)EL1

EC1_Block 18 2

Check Pin

Short/Open/bent?

Replace IC

NG

_

46

EC3_Block

EC4_Block16 4

FC5_Block

FC6_Block 32 49 14 6

FC7_Block

OK

Check Connector 80pin / IC Outputof CONTROL_DATA(POL)

F Buffer E Buffer

FE1 EF1(Output) (Input)

EL2

EC1_Block

EC2_Block18 2

EC3_Block 16 4

Check Pin Short/

Open/Bent

Replace IC

NG

46EC4_Block

FC5_Block

FC6_Block

FC7_Block

46 35 14 6

- 34 -

OK


35/52

2.7.4 Block Address Open (Block Vertical lines don't exist on Video)

Check Connector 80pin / IC Output

OK

o L_

F Buffer E Buffer

FE1 EF1IC2604

(Output)

IC2604

(Input)EL1

EC1 Block

Short/Open/bent?

Replace IC

NG

_

EC2_Block7 13

35

EC3_Block

EC4_Block5 15

FC5_Block

Check Connector 80pin / IC Output

of CONTROL_DATA(BLK)

_ oc

FC7_Block

35 46 3 17

OK

FE1 EF1IC2601

(Output)

IC2601

(Input)EL2

EC1_Block

EC2_Block

7 3

35

EC3_Block

EC4_Block5 15

FC5_Block

FC6_Block 49 32 3 17

Check Pin

Short/Open/bent?

Replace IC

NG

- 35 -

_

OK


36/52

'. .

OKec on ro u pu - gna

of Logic Main

Check CONTROL_DATA Logic Main OutputCheck Pin

Short/Open/bent?NG

LE01 LE02IC2026

(Output)

IC2026

(Input)

CLK 35 7 13

Replace IC

STB 46 9 11

POL 35 12 8

- 36 -


37/52

.

[ COF ]

Address Short


Check Output of R.G.B_DATA

Connector 80pinCOF

Check Address Open.

Line under 96 among 384 NG Check COF failureEC1_Block

75~70(RGB)

67~62(RGB)

EC2_Block59~54(RGB)

51~49/32~30

lines open?

OK-

Check Input-signal pin of

VHCT244 (4.6.8.11.13.15)

EC3_Block27~22(RGB)

19~14(RGB)

EC4_Block 11~6(RGB) 75~70(RGB)

FE1 EF1 EL2

LogicBuffer

-

(16.14.12.9.7.5) of

VHCT244(IC2602.03.08.05.

07.06.09.00.IC2700.01.05.

02.04.03)

NG LogicBuffer

OK

NG

FC5_Block75~70

67~62

6~11

14~19

67~62

59~54

59~54 22~27 51~49

Replace ICK

Logic

Check Output-Signal of

COF Connector / 80pinNG Check pin Open/Short

FC6_Block27~22 54~59

32~30

27~22

FC7_Block19~14

11~6

62~67

70~75

19~14

11~6

Buffer (13~18/49~54) of COF Connecting FPC

OKReplace defected COF Module

- 37 -


38/52

2.8 Address Short some vertical lines a ear to be linked on Video

Check R.G.B DATA Lo ic-Main Out ut


_

LE01 Output-pin Input-pin

EC1_Block 6~11/14~19IC2031 IC2030 IC2031 IC2030

1~20

~ ~

OK

EC2_Block49~51 1~20

EC3_Block 54~59/62~67IC2028 IC2027 IC2028 IC2027

1~20

LE01 LE02 IC2027 IC2026 IC2025 IC2027 IC2026 IC2025

ec u pu - gna

of Logic-Main

EC4_Block70~75 6~11 1~20

FC5_Block14~19

22~27

IC2025 IC2024 IC2025 IC2024

1~20

30~32 _ oc

49~51

54~59

2023 2022 2023 2022

1~20

FC7_Block62~67

70~75

IC2022 IC2021 IC2022 IC2021

1~20

Check Pin

Open / Short / Bent

NG

- 38 -

Replace IC


39/52

2.9 norma ress norma con t on on vert ca nes, except a norma ty n ress pen or ort

[ COF ]

Abnormal Address


Check Output-Signal pin

(18.3)

Check Input-Signal

pin(2.17) of VHCT244. . . .

07.06.09.00/IC2700.01.05.

02.04.03)

Check Output-Signal pin(14)

VHCT244(IC2661,62,IC2706)

LogicBuffer

NG LogicBuffer

NG

Check pin Open/Short

Replace IC

OK

Check Output-Signal pin

of COF Connector / 80pin

19 20 24~27 31 32

NG Check pin Open/Short

OK

Buffer

. . . .

55.56.60~63.67.68)ec con ac an a gne s a


OK

Replace defected COF module

- 39 -


40/52

2.9 Abnormal Address (Abnormal condition on vertical lines, exce t abnormalit in Address O en or Short)

Check CONTROL_DATA(CLK) Connector 80pin / IC output

NGCheck Control output-

Signal of Logic Buffer Check pinNG


FE1 EF1IC2604

(Output)

IC2604

(Input)EL1

EC1_Block

EC2_Block18 2

Short/Open/Bent

Replace IC

NG

46

EC3_Block

EC4_Block16 4

FC5_Block

FC6_Block

FC7_Block

32 49 14 6

OK

_

F Buffer E Buffer

FE1 EF1IC2601

(Output)

IC2601

(Input)EL2

Check pin

Short/Open/Bent

Replace IC

NG

_

EC2_Block18 2

46

EC3_Block

EC4_Block16 4

FC5_Block

- 40 -

FC6_Block

FC7_Block

46 35 14 6


41/52

OK

. norma ress norma con on on ver ca nes, excep a norma y n ress pen or or

_

F Buffer E Buffer

FE1 EF1IC2604

(Output)

IC2604

(Input)EL1

EC1_Block

heck pin

Short/Open/Bent

Replace IC

NG

_

EC2_Block

35

EC3_Block

EC4_Block5 15

FC5_Block

FC6 Block 35 46 3 17_

FC7_Block

OKCheck CONTROL_DATA(BLK) Connector 80pin / IC Output

F Buffer E Buffer

FE1 EF1IC2601

(Output)

IC2601

(Input)EL2

Check pin

Short/Open/Bent

Replace IC

NG

_ oc

EC2_Block7 3

35

EC3_Block

EC4_Block5 15

FC5_Block

- 41 -

FC6_Block

FC7_Block

49 32 3 17


42/52

2.9 Abnormal Address (Abnormal condition on vertical lines, except abnormality in Address Open or Short)

OKCheck control Output-

Signal of Logic-Main

Check CONTROL_DATA Logic-Main Output

IC2026 IC2026

Check pin

Short/Open/Bent

Replace IC

NG

(Output) (Input)

CLK 35 7 13

STB 46 9 11

POL 35 12 8

BLK 46 14 6

- 42 -


43/52

- 43 -


44/52

- 44 -


45/52

'-

- 45 -


46/52

'-

- 46 -


47/52

How to adjust waveform

Mainte-

nance

Mainte-

nance

Mainte-

nance

- 47 -


48/52

dani

1. Y buffer- Para detectar si hay algn fallo en Y Main, comprobar antes el correcto funcionamiento de Y buffer.

rou es oo ng rcu os r verrou es oo ng rcu os r ver

- esconectar a n e u er,

- Comprobar en bornes OUTL and OUTH del diodo que haya una caida de tensin de 0,4 a 05V.

- Al mismo tiempo la resistencia entre esos puntos tiene que ser de alto valor (k).

OUT L OUT H

OUTLOUTH

OUTL

- 48 -


49/52

2. Y Main

- Tras conectar Y Main con Y Buffer, com robar las salidas OUT1~8 de la Y buffer

rou es oo ng rcu os r verrou es oo ng rcu os r ver

OUT1 OUT2 You must check 1EA of Scan pul se i s out put

OUT4OUT3

OUT6 OUT5

- 49 -


50/52

Troubleshootin Circuitos DriverTroubleshootin Circuitos Driver

3. X Main

- Comprobar si la salida TPOUT en la placa X Main

TPOUT

- 50 -


51/52

1 2 3 4

42 SD 42 HD OL D

EXT INT

ON : UP

OFF : DOWN

SW1 : NT PAL UP : NT SC DOWN : PAL

SW2 : DATA UP : EXT DOWN : IN T

42 HD LVDS INTERFACE SETTI NG (7/29~)

IN T I/F EXT I/F

SW3 : IN T CLK UP : ON DOWN : OFF

SW4 : EXT CLK UP : ON DOWN : OFF

CAUTION !

50 & 63 H D

1 2 3 4 5 6

INT

ONOFF

INT PTN

PAL:ON

NT:OFF

CL K

INT:ON

EXT:OFF

I2C

K EY SCAN:ON

SCALER : OFF

EX T

ON

- 51 -


52/52

- 52 -

Manual Reparacion Pdp42

Documents

Transcript of Manual Reparacion Pdp42