LG 42PJ350 Скачать руководство пользователя страница 129

Страница: 129 / 132

NOTE:

Diode tests are conducted with the board disconnected.

SMPS Test

– Unplug P813 to Main board.

Use two (100W) light bulbs in series
between Vs and Gnd to place a load on the
SMPS. Apply AC, all voltages should run.
If all supplies do not run when A/C is
applied, disconnect P811 to isolate the
excessive load. See “Auto Gen” on the
Control board to perform a Panel Test.

To Speakers

All Pins 8.39V
Diode: (Open)

* If the complaint is no video and shorting
the points (AutoGen) causes video to appear
suspect the Main board or LVDS cable.
Note: LVDS Cable must be removed for Auto
Gen to work.

With the unit on, if D101 is not on, check 5V supply.
If present replace the Control Board. If missing, check
FS201 and see (To Test Power Supply)

Control board test :

Disconnect all connectors.
Jump STBY 5V from SMPS P813 Pin 13.
Apply AC and turn on the Set. Observe Control board
LED, if it’s on, most likely Control board is OK.

42PJ350 (42T1 Panel) CIRCUIT INTERCONNECT DIAGRAM

LVDS

Note: IC121 (3.3V Regulator)
routed to all X Boards

Pin 1-3 (18V)

Note: The RL_On command turns on the 5V,17V and AC_DET.

Note: The M5-On command turns on M5V, Va and Vs.

Note: The Error Det line is not used in this model.

Note: If the AC Det line is Missing, the TV will turn off in ten

seconds.

Note: Pin 18 is grounded on the Main. If opened by pulling

P813, the power supply will turn on automatically.

Pin 4-7 (M5V)

*If AC-Det is missing, as a work around
test, Jump the STBY-5V to the AC-Det
line. If the set works normally, then the
SMPS is defective. If the Main board is the
problem, perform the normal Panel Test to
confirm the Main is the only problem.

FPC

128 Pins on top of the Y-

Drive PWB. TPs are found

on the bottom of the PWB

Y-DRIVE BOARD

p/n: EBR63633601

To Check for Y-SUS Drive Waveform

With the Y-Drive boards Disconnected

Use the Left leg of C213 or screw location M213.

Should be close to 422vpp.

Step 1: RL_On command turns on the
17V for Audio P813 pins 1 and 2. Also
AC-Det (16) turns on. If Missing, the
set will not turn on. RL_On also turns
on the Error Det (8) from SMPS but it is
not used by the Main.
Step 2: M5 On command Turns on 5V
to the Main (P813 pins 5~7) also the
M5V, then Va, then Vs.

Ribbon Cable

Y-SUS and Y Drive Signals

P101

PANEL TEST:

Remove LVDS Cable.

Short across Auto Gen

TPs to generate a test

pattern.

Ft Key Pad

Ft IR

P100

P101

* Note: This voltage will vary in

accordance with Panel Label

Measure with a Scope

Measuring Voltage on Pin 1 with DVM turns the TV on. If TV is on, Input Menu pops up.

P101 Connector "Ft. IR" to "Front Key"

Pin STBY Run Diode Check

Stand-By

Waveform No

Run

Waveform No.

0.07

0.16

2.4V

No 12

No 0

0.07

0.16

2.4V

No 13

No 1

0.07

0.16

2.4V

No 14

No 2

0.07

0.16

2.4V

No 15

No 3

0.07

0.16

2.4V

No 16

No 4

0.07

0.16

2.4V

No 17

No 5

0.07

0.16

2.4V

No 18

No 6

0.07

0.16

2.4V

No 19

No 7

Pin

Label

STBY

Run No

Load Diode

1~2

17V

16.8V

16.79V

Open

3~4

Gnd

5~7

0.47V

5.24V

5.25V

1.29V

Error_Det 2.88V

4.93V

4.91V

2.96V

9~12

Gnd

13~14 STBY_5V 3.49V

5.23V

5.25V

2.43V

RL_ON

2.43V

0.0V

Open

AC Det

4.45V

4.93V

2.95V

M_ON

3.27V

0.0V

Open

Auto_Gnd Gnd

Gnd

4.84V

2.34V

P813 "SMPS" to P301 "Main"

P211 "Y-SUS" Odd Pins to "Y-Drive" P106

Red Lead on FG

Pin

Label

Run Diode Check Diode Check

SUS_DN (FG)

OC2

2.63V

1.46V

0.68V

OC2

2.63V

1.45V

0.68V

DATA

1.36V

0.53V

DATA

1.36V

0.55V

OC1

2.2V

1.45V

0.68V

OC1

2.2V

1.45V

0.68V

STB

2.8V

1.36V

0.53V

STB

2.8V

1.36V

0.66V

CLK

0.86V

1.36V

0.53V

CLK

0.86V

1.36V

0.53V

SUS_DN (FG)

FG5V

4.9V

1.97V

0.59V

FG5V

4.9V

1.96V

0.56V

SUS_DN (FG)

"Control" P102P1 to "Z-SUS Board"

Pin

Label

Run Diode

Check

Gnd

Y-OE

0.0V

Open

Dummy-1

1.9V

Open

CTL_OE

0.0V

Open

ER_UP

0.1V

Open

ZSUS_DN

0.86V

Open

ZSUS_UP

0.15V

Gnd

1.47V

(+5V)

1.47V

(+5V)

Gnd

(+15V)

18.24V

Open

(+15V)

18.24V

Open

Connect Scope between Waveform TP J43 on Z-SUS and Gnd

WARNING:

Remove the Y-DRIVE

Board completely if P211

or P106 is removed.

50V

200uS

50VAC rms “White”
46VAC rms “Black”

242V p/p

*Vzb

110V

* Note: This voltage will
vary in accordance with

Panel Label

IC201

P163

IC171

P121

P161

P162

X103

Auto Gen

D101

LED

IC121

TCP/Cntl 3.3V Reg

(1) Gnd
(2) 3.3V
(3) 5V

P102

VS_DA

IC103

IC121

3.3V TP

25Mhz

IC171

(1) Gnd
(2) 1.2V
(3) 3.3V

P232

3.3V in

on Pins

9, 10, 11

P233

X-Board Left

p/n: EBR63628801

P201

P202

P203

P204

P205

P206

P232

P211

Pin

Run Diode

Check

1,2

GND

4,5

Open

Pin

Run Diode

Check

1,2

GND

4,5

Open

TCP IC Diagram

P301

P302

P303

P304

P305

P306

X-Board Right

p/n: EBR63628701

P311

P331

Pin

Run Diode

Check

1,2

GND

4,5

Open

P331

3.3V in

on Pins

42, 43, 44

Red

Lead on TCP VA Open

Black Lead on TCP VA 0.59V

Red

Lead on TCP 3.3V Open

Black Lead on TCP 3.3V 1.08V

Red

Lead on TCP VA Open

Black Lead on TCP VA 0.52V

TCP TEST REMOVED

TCP INSTALLED

Red

Lead on TCP 3.3V 0.6V

Black Lead on TCP 3.3V 0.39V

TCP TESTING

P100 "IR Board" to "Main" P704

Pin

Label

STBY Run Diode

Check

3.43V 4.9V

Open

Gnd

Key_CTL_0 3.29V 3.29V

2.52V

Key_CTL_1 3.29V 3.29V

2.52V

LED_RED

2.72V

3.13V

Gnd

EYE_SCL

3.29V

2.22V

EYE_SDA

0.23V 3.29V

2.21V

Gnd

3.3VST

3.29V 3.29V

2.17V

3.3V_MST

3.29V

2.25V

12 LED_BLUE

*0V

Open

* Note: This voltage will rise to

3.37V at turn ON then drop to 0V

P1 "Z SUS Board" to "Control" P102

2.82V

0.86V

ZSUS_DN

2.82V

0.1V

ER_UP

Gnd

0.0V

CTL_OE

2.82V

1.9V

Dummy-1

Open

0.0V

Y-OE

Gnd

1.9V

18.24V

(+15V)

1.9V

18.24V

(+15V)

Open

(+5V)

Open

(+5V)

Gnd

2.82V

0.15V

ZSUS_UP

Diode Check

Run

Diode Check

Run

Label

Pin

Label

Pin

P206 "Y-SUS" to "Z-SUS" P2

Pin

Label

Run Diode

Check

1~2

+Vs

*205V

Open

n/c

4~7 ER_COM *133V

Open

n/c

9~12

Gnd

* Note: This voltage will vary in accordance with Panel Label

P101 "Y-SUS" to P101 "Control"

Pin

Label

Run Diode Check

+15V

18.24V

1.14V

+5V

1.11V

+5V

1.11V

Gnd

12 Dummy_2

2.14V

2.80V

OC2

1.85V

2.81V

DATA

2.81V

BLK

1.4V

2.81V

STB

1.5V

2.81V

CLK

0.59V

2.81V

24 Dummy_3

1.97V

2.81V

26 Dummy_4

1.23V

3.19V

CTL_OE

0.23V

3.18V

Gnd

Pin

Label

Run Diode Check

+15V

18.24V

1.14V

+15V

18.24V

1.14V

+5V

1.11V

+5V

1.11V

Gnd

Y-OE

0.02V

1.81V

ER_DN

1.05V

2.81V

ER_UP

0.26V

2.81V

SET_UP 0.24V

2.81V

21 Dummy_5 1.05V

3.19V

SUS_DN 2.75V

2.81V

25 Dummy_1 1.04V

2.81V

SUS_UP 0.05V

2.81V

SET_DN 2.10V

2.81V

100V

2mSec

540V p/p

Connect Scope between Waveform TP on Y-Drive and Gnd

Waveform TP on the Y-Drive Board

100V

100uS

69VAC rms “White”
72VAC rms “Black”

540V p/p

155Vpp ± 5V

(A) VR601

Set-up

(B) VR401

Set-Dn

170uSec ± 5uSec

Control Board

p/n: EBR63632301

Z-Bias

Waveform

J43

VZB TP

R151

VR1
VZB

Z-SUS BOARD

p/n: EBR63038801

Q201

Q202

Q203

Q205

Q206

Q202

D101

D103

Q102

J43

VR1

NOTE:

Grayed components are on the back of the PWB.

IC101

IC102

IC103

IC104

IC105

IC106

IC107

IC108

P106

Y Drive

P201

P202

P203

P204

P205

P206

From M5V

T502 Driver IC509
18V – D506
*FG 5V – D509 or C520
*FG 15V – D508 or C519

From VS

T501 Driver IC501
-VY – D502
VSC – D503 to Q501

205.0V

D904

56.8V

1.3V

*D102

62.7V

57.0V

*D301

62.9V

56.2V

*D302

62.6V

56.2V

*D306

389.9V

160.6V

*D309

389.9V

160.6V

*D308

467.0V

160.6V

*D305

22.58V

14.06V

*D303

21.8V

13.81V

*D609

15.6V

12.26V

*D307

195.0V

.23V

*D807

6.16V

*D802

192.0V

*D801

390.0V

2.6V

*D601

Run

STBY

Loc

SMPS Diode Voltages

* Note: Voltages taken

from HOT GND.

P811 "SMPS" to P201 "Y-SUS

2.12V

5.25V

M5V

2.12V

5.25V

M5V

Gnd

Open

*60V

Open

*60V

Gnd

n/c

Open

*206V

Open

*206V

Diode Check

Run

STBY

Label

Pin

* Note: This voltage will vary by Panel label

CN701

n/c

SC101

AC In

POWER SUPPLY

p/n: EAY60912401

At Power Off

3sec 1

Relay click

4sec 2

Relay click

F101

10A 250V

F302 2.5A

250V

F801

4A 250V

VS ADJ

VA ADJ

Q603

Q601

Q602

D101

IC301

Q802

Q801

Q356

D352

Q351

Q355

Q501

Q504

Q901

Q902

P813

D904

D801

D807

D802

D609

D307

D303

D305

D308

D309

D306

D302

D301

D102

D601

RL101

RL103

160V STBY

389V Run

2.6V STBY

390V Run

IC701

Q352 (Run 5v)

Q351

(STBY 5V)

M5V

17V

NOTE: Grayed components
are on the back of the PWB.

L691

L602

FS202

125V

4A (VS)

P206

*NOTE: J393 must be grounded when
testing these with only M5V supplied to
the PWB.

T301

Z Sub BOARD

p/n: EBR63634601

FS201

0.65V with all

connectors connected,
1.11V with all connectors
removed.

FS203

Open with all

connectors connected.

FS203

125V

10A (VA)

P201

T501

P101

P211

P209

Q11

J461

VSC

Y-SUS BOARD

p/n: EBR63038301

VR401

Set-Dn

-Vy

VR501

VSC

L15V

Meters 18V

J11

OE TP

15V FG

J18

-VY

Q12

Q13

Q15

Q16

Q21

Q22

D33

D21

Q33

D31

Q31

Q41

IC103

IC102

IC501

IC502
IC510

IC303

IC202

IC201

IC509

D506

IC301

D503

IC702

IC601

IC701

T502

VR502

D513

D716

IC401

VR401

VR501

VR601

Q501

Q503

SCAN TP

IC703

FS201

125V

4A (M5V)

VR502

-Vy

VR601

Set-UP

D713

D712

D502

D509

D508

FS201 M5V

FS203 VA
FS202 VS

VSC

M213

M214

M215

M216

M217

C213

J393

C520

C519

FG 15V

FG 5V

P209 Y-SUS

Diode Check

Pin

Run

1,2

Open

4,5

Gnd

IC503

P704

P802

MAIN BOARD

p/n: EBT60953602

P703

P301

IC402

X402

IC1

Mstar

Micro/

Video

IC202

IC401

TUNER

IC308

X401

E B

Q402 Q404
Q401 Q403

31.875Mhz

25Mhz

IC801

To SMPS

To Ft IR

To SPK

L313

D504

D501

12Mhz

L803

L804

D505

C A2

IC201

IC504

IC306

IC307

Q504

IC701

IC501

IC304

Q303

Q304

IC203

IC301

IC602

Q503

IC502

Q501

IC703

IC303

D502

Q301

IC302

Q302

E
B

Q703

E
B

Q702

R- R+ L- L+

NOTE: Grayed components
are on the back of the PWB.

P206 "Y-SUS" to "Z-SUS" P2

Pin

Label

Run Diode

Check

1~2

+Vs

*205V

Open

n/c

4~7 ER_COM *133V

Open

n/c

9~12

Gnd

Содержание 42PJ350

Страница 1: ...Advanced Single Scan Troubleshooting 42 Class HD 720p Plasma TV 41 6 diagonally Training Manual 42PJ350 Plasma Display 42PJ350 Plasma Display Published August 12th 2010 ...

Страница 2: ... 2 Troubleshooting Circuit Board Operation Troubleshooting and Alignment of Switch Mode Power Supply No VS On command input to SMPS Main Board Preliminary Contact Information Preliminary Matters Specifications Plasma Overview General Troubleshooting Steps Disassembly Instructions Voltage and Signal Distribution OUTLINE OUTLINE No Main Power Switch Vacation Switch Interconnect Diagram 11X17 Foldout...

Страница 3: ... money sometimes can be overlooked These techniques will also be presented The next section will get the Technician familiar with the Disassembly Identification and Layout of the Plasma Display Panel At the end of this Section the Technician should be able to Identify the Circuit Boards and have the ability and knowledge necessary to safely remove and replace any Circuit Board or Assembly Overview...

Страница 4: ...d Huntsville AL 35813 32LG40 32LH30 37LH55 42LG60 42LG70 42LH20 42LH40 42LH50 42LH90 42SL80 47LG90 47LH85 47LE8500 42PG20 42PQ20 42PQ30 50PG20 42PJ350 50PK750 50PS80 50PS60 60PK750 60PS11 60PS60 60PS80 LCD DV PLASMA Also available on the Plasma Page PDP Panel Alignment Handbook Schematics with Bookmarks Plasma Control Board ROM Update Jig required Presentations with Audio Video and Screen Marks Ne...

Страница 5: ... Electronics Unauthorized modifications will not only void the warranty but may lead to property damage or user injury If wires screws clips straps nuts or washers used to complete a ground path are removed for service they must be returned to their original positions and properly fastened CAUTION CAUTION To avoid personal injury disconnect the power before servicing this product If electrical pow...

Страница 6: ...ice pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause harmful interference to radio communications However there ...

Страница 7: ...arged because of residual current stored before Circuit Board removal 4 C MOS circuits are used extensively for processing the Drive Signals and should be protected from static electricity 5 The PDP Module must be carried by two people Always carry vertical NOT horizontal 6 The Plasma television should be transported vertically NOT horizontally 7 Exercise care when making voltage and waveform chec...

Страница 8: ...h examination using your senses the first check should always be the DC Supply Voltages to those circuits under test Always confirm the supplies are not only the proper level but be sure they are noise free If the supplies are missing check the resistance for possible short circuits Isolate To further isolate the failure check for the proper waveforms with the Oscilloscope to make a final determin...

Страница 9: ...010 42PJ350 Plasma This section of the manual will discuss the specifications of the 42PJ350 Advanced Single Scan Plasma Display Television 42PJ350 PRODUCT INFORMATION SECTION 42PJ350 PRODUCT INFORMATION SECTION ...

Страница 10: ...tion 3M 1 Dynamic Contrast Ratio TruSlim Frame Picture Wizard II Easy Picture Calibration Smart Energy Saving Intelligent Sensor Dual XD Engine AV Mode Cinema Sports Game Clear Voice II ISFccc Ready 24P Real Cinema USB 2 0 JPEG MP3 3 HDMI 1 3 Inputs SIMPLINK Connectivity Dolby Digital 5 1 Decoder Infinite Sound For Full Specifications See the Specification Sheet ...

Страница 11: ...ever before The 600Hz refresh rate virtually eliminates motion blur 3 000 000 1 Contrast Ratio Stunning detail No more worrying about dark scenes or dull colors The Mega Contrast ratio of 3 000 000 1 delivers more stunning colors and deeper blacks than you can imagine TruSlim Design At less than 1 thick the new TruSlim Frame trims away distraction without compromising screen size USB 2 0 View vide...

Страница 12: ...ON 720P HD Resolution Pixels 1365 H 768 V See and experience more Pictures are sharper Colors are more vibrant Entertainment is more real Everything looks better on an HDTV HDMI 1 3 Deep Color Digital multi connectivity HDMI 1 3 Deep color provides a wider bandwidth 340MHz 10 2Gbps than that of HDMI 1 2 delivering a broader range of colors and also drastically improves the data transmission speed ...

Страница 13: ... when background noise swells Save Energy Save Money Home electronic products use energy when they re off to power features like clock displays and remote controls Those that have earned the ENERGY STAR use as much as 60 less energy to perform these functions while providing the same performance at the same price as less efficient models Less energy means you pay less on your energy bill Draws les...

Страница 14: ...y using 10 sub fields per frame process vs Comp 8 sub field frame No smeared images during fast motion scenes 600Hz Sub Field Driving 600Hz Sub Field Driving Sub Field firing occurs using wall charge and polarity differences between Y SUS and Z SUS signals Original Image 10 Sub Fields Per Frame ...

Страница 15: ...15 August 2010 42PJ350 Plasma 42PJ350 Remote Control 42PJ350 Remote Control TOP PORTION BOTTOM PORTION p n AKB72914201 ...

Страница 16: ...6 August 2010 42PJ350 Plasma 42PJ350 Rear and Side Input Jacks 42PJ350 Rear and Side Input Jacks USB for Music Photos and Software Upgrades AC In SIDE INPUTS REAR INPUTS HDMI 3 USB Composite Video Audio ...

Страница 17: ...ount Model No Serial No Label 18 3 4 476 25mm 27 1 8 688 34mm 4 9 16 116mm 2 13 16 71 43mm 15 3 4 400mm 15 3 4 400mm 47 6 lbs with Stand 41 1 lbs without Stand Weight There must be at least 4 inches of Clearance on all sides 285W Typical 0 2W Stand By Power 3 15 16 100mm 2 3 16 56mm 17 August 2010 42PJ350 Plasma 11 7 16 290mm ...

Страница 18: ... discuss Disassembly Layout and Circuit Board Identification of the 42PJ350 Advanced Single Scan Plasma Display Panel Upon completion of this section the Technician will have a better understanding of the disassembly procedures the layout of the printed circuit boards and be able to identify each board ...

Страница 19: ...emoving the Back Cover To remove the back cover remove the 32 screws Indicated by the arrows The Stand does not need to be removed PAY CLOSE ATTENTION TO THE TYPE SIZE AND LENGTH Of the screws when replacing the back cover Improper type can damage the front ...

Страница 20: ...ng the Circuit Boards Right X Y SUS Z SUS Left X Main Board Power Supply SMPS FPC Panel Voltage and Panel ID Label FPC Invisible Speakers FPC FPC FPC TCP Heat Sink AC In Side Input part of main FPC Z SUB FPC FPC Conductive Tape Conductive Tape Y Drive Board IR LED Board Control Soft Touch Keyboard Conductive Tape ...

Страница 21: ...211 P106 P204 P205 P206 P201 P202 P303 Y SUS Board Y DRIVE Board P233 P102 Speakers Front Left AC In P900 n c P101 P162 p n EBR63632301 p n EAY60912401 p n EBR63038801 Z SUB Board p n EBR63038301 p n EBR63633601 p n EBR63628801 p n EBR63628701 p n EBT60953602 p n EAB60962801 p n EAB60962801 p n EBR65007704 P331 P311 P206 P703 P121 P163 n c P3 P2 PANEL p n EAJ60716204 PDP42T10000 ADLGB p n EAJ60716...

Страница 22: ... out Remove the 16 screws holding the Y SUS in place Do not run the set with P211removed Remove the Y SUS board When replacing be sure to readjust the Va Vs voltages in accordance with the Panel Label Confirm VSC Vy and Z bias as well Disconnect P101 P106 Connectors to the Panel Remove P106 by lifting up on the locking mechanism and pull the ribbon cable out Do not run the set with P106 connector ...

Страница 23: ...emove the 4 screws holding the Main board in place and Remove the board Disconnect the following connectors P121 LVDS P101 Ribbon and P102 Then P161 P162 Ribbons by lifting up the locking tab Remove the 1 screws holding the Control board in place Lift up the bottom and pull down to unseat it from the two metal supports at the top and Remove the board Pay attention to the top right back side of the...

Страница 24: ...this heat sink removed To remove the heat sink lift up to release the tacky Chocolate heat transfer material and slide the heat sink to the left to clear the connector wires on the right side Note There are three large pieces of conductive tape on the heat sink that must be removed Also note that there several pieces of Chocolate heat transfer material attached all the way across the underside of ...

Страница 25: ...Circuit Boards Getting to the X Circuit Boards B Warning Never run the TV with the TCP Heat Sink removed E Left E Right F Heat Sink Ground Wire D With Stand removed D Warning Shorting Hazard Conductive Tape Do not allow to touch energized circuits C ...

Страница 26: ...the locking mechanism upward on all TCP connectors Left X P201 206 Right X P301 306 Carefully lift the TCP ribbon up and off It may stick be careful not to crack TCP See next page for precautions See below to Remove the Connections on the X Boards Removing Connectors to the TCPs Disconnect connector P233 P232 P331 Are the same Cushion Chocolate TCP Flexible ribbon cable connector Va from the Y SUS...

Страница 27: ...needs to be handled carefully Separate the TCP from the connector as shown TCP Film can be easily damaged Handle with care The TCP has two small tabs on each side which lock the ribbon cable fully into the connector They have to be lifted up slightly to pull the connector out Note TCP is usually stuck down to the Chocolate heat transfer material be Very Careful when lifting up on the TCP ribbon ca...

Страница 28: ...r Right X Boards 9 Total The Left X Board drives the Right 5 16 of the side of the screen vertical electrodes The Center X Board drives the Center 3 8 of the of the screen vertical electrodes The Right X Board drives the Left 5 16 of the side of the screen vertical electrodes Shared with the Right X Shared with the Left X ...

Страница 29: ...Drive Boards At the end of this Section the technician should understand the operation of each circuit board and how to adjust the controls The technician should be able with confidence to troubleshoot a circuit board failure replace the defective circuit and perform all necessary adjustments CIRCUIT OPERATION TROUBLESHOOTING AND CIRCUIT ALIGNMENT SECTION CIRCUIT OPERATION TROUBLESHOOTING AND CIRC...

Страница 30: ...ess Display Panel Horizontal Electrodes Sustain 18V M5V RL_ON M_On STB5V 5V 17V to Main Board Vs Va and M5V to Y SUS SMPS OUTPUT VOLTAGES IN RUN 18V M5V Z Drive Control Signals IR Intelligent Sensor FPCs FPCs 3 3V STBY P211 P331 P233 P101 P121 P206 Vs Note Va not used by Y SUS only fused and routed to the X Board P2 P4 P101 Note 18V not used by Control LVDS Va FPCs FPCs 5VFG 5V measured from Float...

Страница 31: ...Voltage Set Up Vy Vsc Ve Vzb 6 Trade name of LG Electronics 7 Manufactured date Year Month 8 Warning Panel Label Explanation Panel Label Explanation 9 TUV Approval Mark Not Used 10 UL Approval Mark 11 UL Approval No 12 Panel Model Name 13 Max Watt Full White 14 Max Volts 15 Max Amps 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 ...

Страница 32: ...w panel 3 A Picture issue is encountered 4 As a general rule of thumb when ever the back is removed Remember the Voltage Label MUST be followed it is specific to the panel s needs All label references are from a specific panel They are not the same for every panel encountered Panel Rear View The Waveform adjustment is only necessary 1 When the Y SUS board is replaced 2 When a Mal Discharge problem...

Страница 33: ...POWER SUPPLY SECTION SWITCH MODE POWER SUPPLY SECTION This Section of the Presentation will cover troubleshooting the Switch Mode Power Supply for the Single Scan Plasma Upon completion of the section the technician will have a better understanding of the operation of the Power Supply Circuit and will be able to locate voltage and test points needed for troubleshooting and alignments SMPS p n EAY6...

Страница 34: ...on the Y SUS then routed to the Control board and then to the Z SUS Board 17V Audio B Supply Tuner B Circuits Adjustments There are 2 adjustments located on the Power Supply Board VA and VS The M5V is pre adjusted and fixed All adjustments are made referenced to Chassis Ground Use Full White Raster 100 IRE VA VS VR502 VR901 Switch Mode Power Supply Overview Switch Mode Power Supply Overview 5V Sig...

Страница 35: ...In POWER SUPPLY p n EAY60912401 At Power Off 3sec 1st Relay click 4sec 2nd Relay click T301 T901 F101 10A 250V F302 2 5A 250V F801 4A 250V Q603 Q601 Q602 D101 IC301 Q802 Q801 Q356 D352 Q351 Q355 Q501 Q504 Q901 Q902 P813 D904 D801 D807 D802 D609 D307 D303 D305 D308 D309 D306 D302 D301 D102 D601 RL101 RL103 Grayed out components are on the back side of the board T901 L691 L602 VR901 VS VR502 VA ...

Страница 36: ...t Layout PFC Circuit To MAIN P813 P811 To Y SUS VA VR502 AC Input SC 101 RL103 RL104 Fuse F801 2 6V Stby 390V Run Main Fuse F101 4Amp 250V Fuse F302 160V Stby 389V Run 2 5Amp 250V Bridge Rectifier N C 5V Source STBY 5V 5V and Controller On Back of the board Controller STBY 5V Source M5V Source VA Source VS Source ...

Страница 37: ... the set will come on but shut off in 10 seconds When RL_ON arrives the run voltage 5V source becomes active and is sent to the Main Board via P813 5 24V at pin 5 6 and 7 The Error Det from the SMPS Board to the Main Board can be measured at pin 8 of P813 2 88V STBY and 4 93V RUN but it is not used The RL ON command also turns on the 17V Audio B 16 79V which is also sent to the Main Board The 17V ...

Страница 38: ... On Y SUS Z SUS 18V 18V M5V 5VFG Va X Board Right Y DRIVE Upper 3 3V_ST M5V M5V Vs Vs Va 7 7 8 3 3V 7 8 4 2 4 Vs Va 9 9 7 7 8 Front IR Board POWER SUPPLY SMPS AC Det If missing set will not turn on 5V 17V Audio IC801 17V 17V Reg 6 5V HDMI EDID And other circuits M_On 5V Floating Gnd 6 Not Used Stand By 5V Reg Error Det 3 3VST M_On 9 7 8 7 9 9 3 46V 5 14V STBY RUN 18V M5V Soft Touch Key Pad Power K...

Страница 39: ... Pin 6 or 7 Important Use the Panel Label Not this book for all voltage adjustments Use Full White Raster White Wash Va Adjust Place voltmeter on VA TP Adjust VR502 until the reading matches your Panel s label Example Voltage Label Vs Adjust Place voltmeter on VS TP Adjust VR901 until the reading matches your Panel s label ...

Страница 40: ... SC101 If the light bulbs turn on and VS is the correct voltage allow the SMPS to run for several minutes to be sure it will operate under load If this test is successful and all other voltages are generated you can be fairly assured the power supply is OK Note To be 100 sure you would need to read the current handling capabilities of each power supply listed on the silk screen on the SMPS and pla...

Страница 41: ...301 Main Board side to insert the resistors or jumper leads Connect 2 100 Watt light bulbs in series between VS and Ground WARNING Remove AC when adding or removing any plug or resistor Power Supply Static Test Forcing on the SMPS in stages Power Supply Static Test Forcing on the SMPS in stages When the supply is operational in its normal state the Auto Ground line at Pin 18 of P813 is held at gro...

Страница 42: ...en the M_On Monitor On command arrives c Note The Error Det line is not used in this model d Note If the AC Det line is Missing the TV will shut off after 10 seconds of operation e Note Pin 18 is grounded on the Main board If this line is floated the SMPS turns on Automatically when AC is applied 2 34V 4 84V Gnd Gnd e Auto_Gnd 18 Open 0 0V 3 27V 0V b M_ON 17 2 95V 4 93V 4 45V 0V d AC Det 16 Open 0...

Страница 43: ... c 3 Open 206V Vs 1 2 Diode Mode Run Label Pin SC101 AC INPUT Standby Run Diode Mode Connector Pin Number SC101 120VAC 120VAC Open L and N Diode Mode Readings taken with all connectors Disconnected DVM in Diode Mode P811 Power Supply to Y SUS P201 Note This voltage will vary in accordance with Panel Label P811 1 Y SUS routes Va to bottom X Left Vs routed to Z SUS from P206 M5V routed through Y SUS...

Страница 44: ...ical Electrodes Routed to the Left X Board VS Supplies the Panel s Horizontal Electrodes Also Routed to the Z SUS board M5V Supplies Bias to Y SUS Also routed to the Control Board then Z SUS VY Sets the Negative excursion of Reset in the Drive Waveform VSC Sets the amplitude of the complex waveform SET UP sets amplitude of the Top Ramp of Reset in the Drive Waveform SET DOWN sets the Pitch of the ...

Страница 45: ...stributes 18V and M5V Logic signals needed to generate drive waveform VA Receive M5V Va Vs from SMPS Y Drive Board Receives Scan Waveform Display Panel Power Supply Board SMPS FETs amplify Y Sustain Waveform Left X Board Z SUS Board Distributes 18V M5V Generates Floating Ground 5V 15V by DC DC Converters Logic signals needed to scan the panel Control Board Distributes Vs Distributes Vs Va and M5V ...

Страница 46: ...ins 5 7 18V pins 1 3 to Control for Z SUS M5V pins 4 7 for both Ribbon c P209 VR401 Set Up P101 VR501 VSC FS203 VS 4A 250V FS201 M5V 4A 125V FS203 Va 10A 125V VR502 Vy VR601 Set Up Vy TP VSC TP P211 Floating Gnd To Y Drive p n EBR63038301 Floating Gnd c c P206 c c P201 VS and ERR_COM to the Z SUS Logic Signals to Y Drive Board Floating Gnd Floating Gnd Y SCAN ...

Страница 47: ...V 6 DATA 0V 1 37V 7 OC1 2 2V 1 45V 8 OC1 2 2V 1 45V 9 STB 2 8V 1 36V 10 STB 2 8V 1 36V 11 CLK 0 86V 1 36V 12 CLK 0 86V 1 36V 13 SUS_DN FG FG FG 14 SUS_DN FG FG FG 15 FG5V 4 9V 1 97V 16 FG5V 4 9V 1 96V 17 SUS_DN FG FG FG Pin Label Run Diode Check 1 2 VS 206V Open 3 n c n c n c 4 5 Gnd Gnd Gnd 6 7 VA 60V Open Gnd 8 9 10 M5V 5 25V 2 12V Gnd Gnd Pin Label Run Diode Check 1 2 Gnd Gnd Gnd 3 n c n c n c ...

Страница 48: ...s is the Heat Run mode Set screen to White Wash 1 Adjust Vy VR502 to Panel s Label voltage 1V 2 Adjust VSC VR501 to Panel s Label voltage 1V CAUTION Use the actual panel label and not the book for exact voltage settings Vy VSC Voltages Reads Positive Location Bottom Center of board Just above Transformer Location Bottom Left of the board VSC TP Vy TP This is just for example ...

Страница 49: ...al from waveforms above observed 100uS div 540V p p NOTE The Waveform Test Points are fragile If by accident the land is torn and the run lifted make sure there are no lines left to right in the screen picture 100uSec 69 to 72 Vrms There are several other test points on either the Upper or Lower Y Drive boards that can be used Basically any output pin on any of the FPC to the panel are OK to use 2...

Страница 50: ...on to the Y Drive Waveform Tip Drive Waveform Tip Note this TP VS_DA can be used as an External Trigger for scope when locking onto the Y Drive Scan or the Z Drive signal This signal can also be used to help lock the scope when observing the LVDS video signals ...

Страница 51: ...signal to the right of blanking TIP If you expand to 40uSec per division the adjustment for SET UP can be made using VR601 and the SET DN can be made using VR401 It will make this adjustment easier if you use the Expanded mode of your scope Fig 2 At 200uSec per division the area of the waveform to use for SET UP or SET DN is now becoming clear Now the only two blanking signals are present Set must...

Страница 52: ...ON Lower Center Right of the board SET UP ADJUST 1 Adjust VR601 and set the A portion of the signal to match the waveform above 155V p p 5V SET DN ADJUST 2 Adjust VR401 and set the B time of the signal to match the waveform above 170uSec 5uSec Set must be in WHITE WASH All other DC Voltage adjustments should have already been made VR601 VR401 Under 2nd Buffer from top B A ADJUSTMENT LOCATION Cente...

Страница 53: ...Down Adjustment Extremes Set Up or Down Adjustment Extremes Set Up swing is Minimum 146V Max 204V p p Set Dn swing is Minimum 138uSec Max 186uSec 118V off the Floor Floor Normal 170uSec Too Short 116uSec Normal 155V Too Low 146V Too Low 204V ...

Страница 54: ...n the Y SUS with P211 Y SUS or P106 Y Drive removed unless the Y Drive board is removed completely Board Failures will occur Y Y SUS Board Troubleshooting Y SUS Board Troubleshooting Y Scan Scan TIP Use the Scan Output Screw Lug to test for V Scan signal when the Y Drive board is removed Scan C213 TIP You can also use C213 left leg to test for V Scan signal when the Y Drive board is removed ...

Страница 55: ...S Board TIP Use Scan Screw Lug to test for Y Scan signal if the Y Drive board is removed FG5V 4 9V measured from Pins 15 or 16 to Floating Gnd For Floating Ground use any screw on the far left hand side of the Y SUS board except the one just above P211 this is the Y Scan output P106 P211 TIP This Connector do not come with a new Y SUS or Y Drive c Y Scan Signal c ...

Страница 56: ... All logic pins about 420V p p The signal for these pins look very similar due to the fact they are read from Chassis Gnd but they are actually Floating Ground related DO NOT hook scope Gnd to Floating Gnd TP without an Isolation Transformer Pins 3 12 are Logic Drive Signals to the Y Drive Upper SUS_DN FG 1 2 OC2 3 4 DATA 5 6 OC1 7 8 STB 9 10 CLK 11 12 SUS_DN FG 13 14 FG5V 15 16 SUS_DN FG 17 Label...

Страница 57: ...2 2V YTB_OC1 7 8 0 53V 1 36V 2 8V YB_STB 9 10 0 53V 1 36V 0 86V YB_CLK 11 12 FG FG FG SUS_DN FG 13 14 0 59V 1 97V 4 9V FG5V 15 16 FG FG FG SUS_DN FG 17 Diode Check Diode Check Run Label Pin Red Lead on FG P211 Y SUS to Y Drive P106 Red Lead Black Lead Diode Mode Readings taken with all connectors Disconnected DVM in Diode Mode Chassis Ground Measurements taken from Floating Gnd For Floating Ground...

Страница 58: ... the Y SUS Location FG 15V D506 18 24V Source FG5V Floating Ground 5V D509 cathode Source FG15V Floating Ground 15V D508 cathode TIP Some Circuit components are on the back of the board To Test these voltages remove the board completely supply Ground and any 5V supply to M5V fuse FS201 Ground OE Jumper J393 C519 Side FG15V Source 23 6V J393 OE Location Back Side of Board FG 15V C520 Side FG5V Sour...

Страница 59: ...of T502 Voltage Measurements for the Y SUS Board Y Y SUS 18V Generation Checks SUS 18V Generation Checks 18V Test Point Used in the Y SUS for Waveform Creation and Leaves the Y SUS board on P101 pins 1 3 to the Control Board Checked at Cathode Side D506 Run 18 24V Standby 0V Diode Check 1 14V Location ...

Страница 60: ...nnected FS201 Protects M5V Used for 18V D506 FG5V and FG15V Creation D508 and D509 Also M5V leaves the Y SUS on P101 for the Control board and for the Z SUS FS203 VA 10A 125V FS203 Protects VA which leaves the Y SUS on P203 Diode Check Open With Board Disconnected or Connected FS202 VS 4V 250V Diode Check Open With Board Disconnected or Connected FS202 Protects VS ...

Страница 61: ...206 Plug Information Note These voltages will vary in accordance with Panel Label P206 c P201 Gnd Gnd Gnd 9 12 Open n c n c 8 Open 206V Vs 1 2 Open n c n c 3 Open 133V ER_PASS 4 7 Diode Check Run Label Pin P206 Y SUS to Z SUS P2 2 12V 5 25V M5V 9 10 Gnd Gnd Gnd 8 Open 60V Va 6 7 Gnd Gnd Gnd 4 5 n c n c n c 3 Open 206V Vs 1 2 Diode Check Run Label Pin P201 Connector Y SUS to Power Supply P811 c ...

Страница 62: ...s taken with all connectors Disconnected DVM in Diode Mode Y Y SUS P209 Plug Information SUS P209 Plug Information Note This voltage will vary in accordance with Panel Label c P209 Open 60V Va 4 5 n c n c n c 3 Gnd Gnd Gnd 1 2 Diode Check Run Label Pin P211 Connector Y SUS to Z SUS P2 ...

Страница 63: ...P 27 2 80V 2 14V Dummy_2 12 3 91V 1 23V Dummy_4 26 Gnd Gnd Gnd 11 2 81V 1 04V Dummy_1 25 Gnd Gnd Gnd 10 2 81V 1 97V Dummy_3 24 Gnd Gnd Gnd 9 2 81V 2 75V SUS_DN 23 Gnd Gnd Gnd 8 2 81V 0 59V CLK 22 1 11V 5V 5V 7 3 19V 1 05V Dummy_5 21 1 11V 5V 5V 6 2 81V 1 50V STB 20 1 11V 5V 5V 5 2 81V 0 24V SET_UP 19 1 11V 5V 5V 4 2 81V 1 40V BLK 18 1 24V 18 24V 15V 3 2 81V 0 26V ER_UP 17 1 24V 18 24V 15V 2 2 81V ...

Страница 64: ...veloped on the Y SUS board then selects the horizontal electrodes sequentially starting at the top and scanning down the panel Scanning is synchronized by receiving Logic scan signals from the Control board The 42PJ350 uses 8 Driver ICs on one Y Drive Board commonly called Y Drive Buffers but are actually Gate Arrays Y Y Drive Explained Drive Explained Y Y DRIVE BOARD SECTION DRIVE BOARD SECTION Y...

Страница 65: ...t with the Y SUS board the Y SUS or Y Drive or both boards will fail Floating Ground is delivered to the Y Drive board by 4 screw lugs Scan is delivered to the Y Drive board by 1 screw lugs The Y Drive board operates from Floating Ground no reference to Chassis Gnd Floating Gnd 5V can be measured across C18 or C523 surface mount electrolytic capacitors Y Y Drive Board Layout Drive Board Layout Y D...

Страница 66: ...Drive Layout Y SUS SIDE PANEL SIDE P106 Connector P106 does not come with a new Y SUS or Y Drive Warning Never run the Y SUS with P106 disconnected You must remove the Y Drive board completely due to these FG lugs Floating Ground Standoff The Floating Ground Standoffs deliver FG to the Y Drive Board There are 4 total VScan The VScan Standoff delivers the VScan signal to the Y Drive Boards There is...

Страница 67: ... TP Open with Red Lead on Scan 0 68V with Black Lead on Scan Diode Mode Reading from Floating Ground Scan Signal Floating Gnd FL1 FG5V Fuse FG5V TP P106 pins 2 and 3 2 57V with Red Lead on Scan 0 53V with Black Lead on Scan Any Output Buffer TP Open with Red Lead on Scan 0 80V with Black Lead on Scan Any Connector to the Panel Buffer Output TP Scan Signal TP ...

Страница 68: ...IS PROCEDU YOU CAN CHECK FOR A SHORTED BUFFER ICs OUTPUT USING THIS PROCEDURE RE Any of these output lugs can be checked from floating ground Look for shorts indicating a defective Buffer IC Indicated by white outline 6 Ribbon cables communicating with the Panel s Horizontal Electrodes totaling 768 lines determining the Panel s Vertical resolution pixel count FRONT SIDE BUFFER IC FGnd BACK SIDE BL...

Страница 69: ...Cable carefully slide it back into the slot see Fig 3 be sure the Tab is seated securely and press the Locking Tab back to the locked position see Fig 2 then Fig 1 Removing Panel Flexible Ribbon Cables from Y Removing Panel Flexible Ribbon Cables from Y Drive Upper or Lower Drive Upper or Lower Flexible Ribbon Cables shown are from a different model but pro Flexible Ribbon Cables shown are from a ...

Страница 70: ...The Locking Tab will offer a greater resistance to closing in the case Note the cable is crooked In this case the Tab on the Ribbon cable was improperly seated at the top This can cause bars lines intermittent lines abnormalities in the picture Remove the ribbon cable and re seat it correctly Incorrectly Seated Y Incorrectly Seated Y Drive Flexible Ribbon Cables Drive Flexible Ribbon Cables ...

Страница 71: ... TIP Use Scan Screw Lug on the Y SUS to test for Y Scan signal if the Y Drive board is removed FG5V 4 9V measured from Pins 15 or 16 to Floating Gnd For Floating Ground use any screw on the far left hand side of the Y SUS board except the one just above P106 this is the Y Scan output P106 P211 TIP This Connector does not come with a new Y SUS or Y Drive c Y Scan Signal c ...

Страница 72: ... All logic pins about 420V p p The signal for these pins look very similar due to the fact they are read from Chassis Gnd but they are actually Floating Ground related DO NOT hook scope Gnd to Floating Gnd TP without an Isolation Transformer Pins 6 15 are Logic Drive Signals to the Y Drive Upper SUS_DN FG 16 17 OC2 14 15 DATA 12 13 OC1 10 11 STB 8 9 CLK 6 7 SUS_DN FG 4 5 FG5V 2 3 SUS_DN FG 1 Label...

Страница 73: ... CLK 6 7 FG FG FG SUS_DN FG 4 5 0 53V 2 57V 4 9V FG5V 2 3 FG FG FG SUS_DN FG 1 Diode Check Diode Check Run Label Pin Red Lead on FG P106 Y Drive to Y SUS P211 Red Lead Black Lead Diode Mode Readings taken with all connectors Disconnected DVM in Diode Mode Measurements taken from Floating Gnd For Floating Ground use any screw Lug on the far right hand side of the Y Drive board except the one just a...

Страница 74: ...rol Board Developed on Z SUS Z Bias This Section of the Presentation will cover troubleshooting the Z SUS Board Assembly Upon completion of this section the Technician will have a better understanding of the circuit and be able to locate voltage and diode mode test points needed for troubleshooting and all alignments Note The Z SUS can not be run Stand Alone in the 42T1 Panel Models Z Z SUS SECTIO...

Страница 75: ...s generate erase sustain waveforms Generates Z Bias 100V Receives Logic Signals M5V and VS PDP Display Panel Via 2 FPC Flexible Printed Circuits Control Board Y SUS Board NO IPMs Power Supply Board 18V 18V Z SUS board receives VS and M5V SMPS and 18V from the Control board VS and ERR_COM M5V M5V Z SUB FET Makes Drive waveform ...

Страница 76: ...VS from Y SUS Error Com to the Y SUS M5V from SMPS to the Y SUS generates 18V M5V and 18V are routed through the Control board Logic Signals generated on the Control board Z SUS Waveform Test Point J43 P3 To Z SUB No IPMs Z Bias VR1 Z Bias TP R151 Z SUS Waveform Development FETs P N EBR63038801 P3 No IPMs No IPMs P1 from Control ...

Страница 77: ...350 Z SUS Layout Drawing 77 August 2010 42PJ350 Plasma Z Bias Waveform J43 VZB TP R151 VR1 VZB P1 Z SUS BOARD p n EBR63038801 P4 P3 P2 1 2 VS 4 7 ER_COM 133V RMS Q201 Q202 Q203 Q205 Q206 Q202 D101 D103 Q102 Q4 Q3 Q2 11 12 18V 9 10 M5V ...

Страница 78: ...and to the Z SUB P3 to P2 and to P1 Oscilloscope Connection Point J43 to check Z Output waveform Right Hand Side Center Z Z SUS Waveform SUS Waveform This Waveform is just for reference to observe the effects of Zbz adjustment Vzb voltage 110V 1V Z Drive Waveform Vzb Z Bias VR1 manipulates the offset of this waveform segment TIP The Z Bias VZB Adjustment is a DC level adjustment This is only to sh...

Страница 79: ...hould run for 15 minutes this is the Heat Run mode Set screen to White Wash mode or 100 IRE White input All SMPS adjustments should have been completed 1 Place DC Volt meter between VZB TPs 2 Adjust VZB Z Bias VR1 in accordance with your Panel s voltage label VZB Z Bias Center Left of Z SUS Board VZB Z Bias VR1 VZB Z Bias TP R151 LOCATION ...

Страница 80: ...s and Diode Checks SUS P206 Voltages and Diode Checks Voltage and Diode Mode Measurements Pin 1 P2 Location Top Left There are no Stand By voltages on this connector Gnd Gnd Gnd 7 11 n c n c n c 6 Open 98V 102V ER_COM 4 5 n c n c n c 3 Open 205V Vs 1 2 Diode Check Run Label Pin P2 Z SUS to Y SUS P206 Note This voltage will vary in accordance with Panel Label ...

Страница 81: ...d Diode Checks Voltage and Diode Mode Measurements P1 Location Bottom Left hand side Pin 1 There are no Stand By voltages on this connector P1 Z SUS Board to Control P102 1 9V 18 24V 15V 12 1 9V 18 24V 15V 11 Open 5V 5V 10 Open 5V 5V 9 Gnd Gnd Gnd 8 2 82V 0 15V ZSUS_UP 7 2 82V 0 86V ZSUS_DN 6 2 82V 0 1V ER_UP 5 Gnd Gnd Gnd 4 2 82V 1 9V Z_BIAS 3 Open 0 0V Y OE 2 Gnd Gnd Gnd 1 Diode Check Run Label ...

Страница 82: ...ing the Control Board Assembly Upon completion of this section the Technician will have a better understanding of the circuit and be able to locate voltage and diode mode test points needed for troubleshooting Main Board Supplied Panel Control and LVDS Video Signals Operating Voltages Control Board Generated Y SUS and Z SUS Drive Signals Sustain X Board Drive Signals RGB Address From the Y SUS Sup...

Страница 83: ...Pictorial Control Board Pictorial p n EBR63632301 Pattern Generator For Panel Test n c For ROM Updates P101 P161 P162 D101 Should be blinking IC121 P121 P163 P102 LVDS To Z SUS To X Right To X Left To Y SUS IC171 VS_DA For External Trigger IC102 ...

Страница 84: ...AC and turn on the Set Observe Control board LED D101 if it s on most likely Control board is OK 3 3V and X Drive Center and Right RGB Signals Z Drive Creation Signals M5V and 16V to Z SUS Note IC121 3 3V Regulator routed to both X Boards 1 3 16V Ribbon Cable Y SUS and Y Drive Signals CONTROL BOARD p n EBR63632301 4 7 M5V X Drive Left RGB Signals LVDS Video from Main Pin Label Run Diode 1 2 15V 18...

Страница 85: ...BACK SIDE OF THE BOARD Chocolate Heat Transfer Material 03 Gnd 02 Gnd 01 3 3V 04 3 3V 05 Gnd 06 3 3V IC151 Pin 1 Make sure the Chocolate Heat Transfer Material remains in place if the board is removed Note The temperature circuit not only protects the panel from overheating but it also is responsible for manipulating the Y Drive waveform as the panel changes temperature IC151 ...

Страница 86: ... Drive or Z Drive or Z Drive Waveform Tip Drive Waveform Tip Note this TP VS_DA can be used as an External Trigger for scope when locking onto the Y Drive Scan or the Z Drive signal This signal can also be used to help lock the scope when observing the LVDS video signals ...

Страница 87: ... of the sine wave is 25 MHZ Missing this clock signal will halt operation of the panel drive signals Checking the Crystal X103 Checking the Crystal X103 Clock Clock on the Control Board on the Control Board CONTROL BOARD CRYSTAL LOCATION X103 Osc Check 25Mhz Left Leg Osc Check 25Mhz Right Leg ...

Страница 88: ...Control Board problem MCM 16 bit words Resistor Array 256 Lines output Total Basic Diagram of Control Board Control Board to X Board Address Signal Flow IC201 Control Board Signal Simplified Block Diagram Control Board Signal Simplified Block Diagram MCM IC201 2 Buffer Outputs per TCP CONTROL BOARD X DRIVE BOARD PANEL 128 Lines per Buffer EEPROM There are 12 total TCPs 43072 Vertical Electrodes 43...

Страница 89: ...S Waveform development and Y Drive logic signals to the Y SUS Board Y Drive logic signals are simply routed right through the Y SUS to the Y Drive boards Pin c P101 Label Silk Screen Note The 18V is not used by the Control board it is routed to the Z SUS leaving on P102 Pins 11 12 The M5V also leaves on P102 Pins 9 10 Pins 1 through 3 Receive 18V from the Y SUS Developed by D506 Pins 4 through 7 R...

Страница 90: ...2 81V 1 04V Dummy_1 25 2 82V 2 75V SUS_DN 23 2 81V 1 05V Dummy_5 21 2 83V 0 24V SET_UP 19 2 81V 0 26V ER_UP 17 2 83V 1 05V ER_DN 15 Open 0 02V Y OE 13 Gnd Gnd Gnd 11 Gnd Gnd Gnd 9 1 47V 5V 5V 7 1 47V 5V 5V 5 Open 18 24V 15V 3 Open 18 24V 15V 1 Diode Check Run Label Pin Gnd Gnd Gnd 30 Open 0 23V CTL_OE 28 Open 1 23V Dummy_4 26 2 82V 1 97V Dummy_3 24 2 82V 0 59V CLK 22 2 82V 1 5V STB 20 2 82V 1 4V B...

Страница 91: ...olor Bar input Loss of these Signals would confirm the failure is on the Main Board or the LVDS Cable itself Example of Normal Signals measured at 1V p p at 10µSec Example of LVDS Video Signal LVDS Cable P121 on Control board shown Press two outside tabs inward to release Control Board LVDS P121 Signals Control Board LVDS P121 Signals Pins are close together Use caution Pins 2 5 7 8 11 12 24 25 ar...

Страница 92: ...d test patterns Panel Test Gnd Gnd Gnd 31 Open n c n c 30 Open n c n c 15 Open 3 29V Module_SCL1 29 Gnd Gnd Gnd 14 Open 3 29V Module_SDA1 28 Gnd Gnd Gnd 13 Open 2 79V DISP_EN 27 1 23V 1 31V RD1P 12 Gnd Gnd Gnd 26 1 23V 1 23V RD1N 11 1 23V 1 29V RE1P 25 1 23V 1 26V RCLK1P 10 1 23V 1 19V RE1N 24 1 23V 1 29V RCLK1N 9 2 99V 3 24V DATA 23 1 23V 1 23V RC1P 8 2 99V 0 59V CLK 22 1 23V 1 27V RC1N 7 Open n ...

Страница 93: ...ges in Stand By mode Diode Mode Readings taken with all connectors Disconnected Black lead on Gnd DVM in Diode Mode 1 P102 Label 18V 5V P102 Connector Control to Z SUS Board P1 Open 18 24V 15V 12 Open 18 24V 15V 11 1 47V 5V 5V 10 1 47V 5V 5V 9 Gnd Gnd Gnd 8 Open 0 15V SUS_UP 7 Open 0 86V SUS_DN 6 Open 0 1V ER_UP 5 Open 0 0V CTL_OE 4 Open 1 9V Dummy 1 3 Open 0 0V Y OE 2 Gnd Gnd Gnd 1 Diode Check Ru...

Страница 94: ...3 3V 3 3V 42 1 35V 1 12V A1_P_2 17 0 64V 3 3V 3 3V 41 1 31V 1 18V A2_N_2 16 Gnd Gnd Gnd 40 1 35V 1 12V A2_P_2 15 1 31V 1 18V A1_N_5 39 Gnd Gnd Gnd 14 1 35V 1 12V A1_P_5 38 1 31V 1 18V A1_N_1 13 1 31V 1 18V A2_N_5 37 1 35V 1 12V A1_P_1 12 1 35V 1 12V A2_P_5 36 1 31V 1 18V A2_N_1 11 Gnd Gnd Gnd 35 1 35V 1 12V A2_P_1 10 1 31V 1 18V CLK_N_2 34 Gnd Gnd Gnd 9 1 35V 1 12V CLK_P_2 33 1 31V 1 18V CLK_N_0 8...

Страница 95: ...18V CLK_N_3 18 Gnd Gnd Gnd 42 1 35V 1 12V CLK_P_3 17 1 31V 1 18V A1_N_10 41 Gnd Gnd Gnd 16 1 35V 1 12V A1_P_10 40 1 31V 1 18V A1_N_6 15 1 31V 1 18V A2_N_10 39 1 35V 1 12V A1_P_6 14 1 35V 1 12V A2_P_10 38 1 31V 1 18V A2_N_6 13 Gnd Gnd Gnd 37 1 35V 1 12V A2_P_6 12 1 31V 1 18V A1_N_9 36 Gnd Gnd Gnd 11 1 35V 1 12V A1_P_9 35 0 64V 3 3V 3 3V 10 1 31V 1 18V A2_N_9 34 0 64V 3 3V 3 3V 9 1 35V 1 12V A2_P_9 ...

Страница 96: ...el The X boards are the attachment points for these FPCs These boards have no adjustment X BOARD VOLTAGES VA Originally developed on the Switched Mode Power Supply VA Voltage for Address is routed through the Y SUS board out on P209 pins 4 9 to the Left X Board via P233 pins 4 5 VA leaves the Left X Board P211 pins 4 5 and is sent to the Right X Board via P311 pins 4 5 3 3V Control board develops ...

Страница 97: ...ey route Va voltage to all of the Taped Carrier Packages TCPs Va is introduced to the Left X board first then the Left X Board sends Va to the Right X Board The X Boards also route the Logic Color signals from the Control board to all of the Taped Carrier Packages TCPs The X Boards have connectors to 12 TCPs 6 on the left and right There are a total of 12 TCPs and each TCP has 2 gate arrays so the...

Страница 98: ...rs TCPs have one heat sink one heat sink indicated by the arrow indicated by the arrow It protects all 12 TCPs It protects all 12 TCPs NEVER run the television with this heat sink removed NEVER run the television with this heat sink removed Damage to the TCPs will occur and cause a defective panel Damage to the TCPs will occur and cause a defective panel ...

Страница 99: ...Ps as shown below On any Va 0 52V TCPs connected On any Va Open TCPs disconnected On 3 3V 0 39V TCPs connected On 3 3V Open TCPs disconnected On Gnd On the below On Gnd On the below On any Va Open TCPs connected On any Va Open TCPs disconnected On 3 3V 0 6V TCPs connected On 3 3V Open TCPs disconnected Gnd VA from Y SUS disconnected from Left X board 3 3V Pins 32 33 VA Pins 44 47 VA Pins 4 7 TCP ...

Страница 100: ... Control Board Back side of TCP Ribbon TCP Taped Carrier Package Flexible Cable Y SUS Board Va Logic Connector X Drive Board Long Black Heat Sink 128 lines 128 lines 256 total lines This shows the layout of the bottom ribbon cables connecting to the Panel s Vertical electrodes Address Bus Note that each ribbon cable has a solid state device called a TCP attached 256 Vertical Electrodes Chocolate 3...

Страница 101: ... 40 45 50 1 Va Gnd 3 3V Gnd 20 Gnd n c n c Va TCP Connector Pin Description Any X Board to Any TCP P201 P206 or P301 P306 3 3V Origination From Control board IC121 center leg Leaves P161 to P232 and P162 to P331 Arrives on X board Left P232 Pins 9 11 Arrives on X board Right P331 Pins 42 44 Flexible Printed Ribbon Cable to TCP IC On Va Open On 3 3V Open Va P233 3 4 from Y SUS P209 Va Routes to Lea...

Страница 102: ...nectors to All TCPs look very similar for the 3 3V test point The trace at pins 32 and 33 of each connector There is a small feed trough and a Cap you can use for Test Points Example here from P305 You can only check for continuity back to IC231 you can not run the set with heat sink removed With all connectors connected place the Red Lead On 3 3V Diode Check 0 60V Black Lead On 3 3V Diode Check 0...

Страница 103: ...s colored noise c Cause the entire area driven by the TCP to be All White or ALL BLACK d Cause a Single Pixel Width Line defect The line can be Red Green or Blue e A dirty contact at the connector can cause b c and d also Warning DO NOT attempt to run the set with the Heat Sink over the TCPs removed After a very short time these ICs will begin to self destruct due to overheating TCP Tapped Carrier...

Страница 104: ... P233 Connector from Y SUS P209 Information SUS P209 Information Note This voltage will vary in accordance with Panel Label There are no Stand By voltages on this connector Voltage and Diode Mode Measurement No Stand By Voltages 1 1 With Heat Sink Open 60V VA 5 Open 60V VA 4 n a n a n c 3 Gnd Gnd Gnd 2 Gnd Gnd Gnd 1 Diode Check Run Label Pin P233 X Drive Left to Y SUS P209 ...

Страница 105: ...e Check On Va Open Y SUS connector removed TCPs connected On Va Open all connectors removed TCPs disconnected On Chassis Gnd On Chassis Gnd On Va 0 52 Y SUS connector removed TCPs connected On Va Open all connectors removed TCPs disconnected P211 Left X P311 Right X Va 4 5 1 1 1 1 P331 3 3V 42 44 Out In Va 4 5 1 1 P232 3 3V 9 11 1 1 1 1 ...

Страница 106: ...s located on the main board This board is also where the television s software upgrades are accomplished through the USB input This board has no mechanical adjustments The Main Board Receives its operational voltage from the SMPS STBY 5V 5V for Video processing 17V for Audio DURING STAND BY From SMPS DURING RUN From SMPS STBY 5V remains Distributes power supply turn on commands to the SMPS Distrib...

Страница 107: ...tion IC1 IC1 Microprocessor Video Processor P301 P301 to to SMPS SMPS P703 P703 LVDS LVDS P802 P802 Audio Audio HDMI HDMI RS232 RS232 PC PC Remote Remote Rear Rear Inputs Inputs RF RF In In USB USB HDMI HDMI PC PC Audio Audio Optical Optical Audio Audio P704 P704 to Ft IR to Ft IR RGB RGB RS232 RS232 ...

Страница 108: ...02 All Pins 12 3V MAIN BOARD p n EBT60953602 P703 P301 IC402 X402 IC1 Mstar Micro Video C2 C1 A X1 D1 D2 A2 A1 C C IC202 IC401 TUNER IC308 X401 E B C E B C E B C E B C 31 875Mhz 25Mhz IC801 To SMPS To Ft IR L313 C A2 A1 D504 D501 12Mhz L803 L804 D505 C A2 A1 C A2 A1 IC201 To SPK R R L L Q402 Q404 Q401 Q403 ...

Страница 109: ...t Pin to IC504 7 Gnd B 1 18V Pin Speed Up A1 0V 8 3 3V E 1 18V A1 Gnd A 4 54V C Gnd A 0V A2 5 0V IC308 1 3V_VDDC A2 Gnd Pin Regulator Q403 Tuner SIF D505 B Routing 1 Do not measure Pin Buffer Digital D2 LED R Pin to IC503 2 Gnd B 1 32V Pin Routing A1 0V 3 5 04V E 1 99V A1 0V A 4 54V 4 6 07V C Gnd C 0 13V A2 5 0V 5 4 99V A2 0 28V 6 1 28V Q404 IF_N Buffer 7 1 28V Pin Digital 8 4 27V B 1 32V E 1 99V ...

Страница 110: ...010 42PJ350 Plasma MAIN BOARD p n EBT60953602 1 2 3 1 2 3 E B C IC504 IC306 IC307 Q504 IC701 IC501 IC304 1 2 3 S G D Q303 E B C Q304 IC203 1 2 3 IC301 IC602 Q702 E B C E B C Q503 IC503 IC502 E B C Q501 IC703 1 2 3 IC303 D502 C A2 A1 E B C Q301 2 1 3 IC302 S G D Q302 E B C Q703 ...

Страница 111: ... 1 3 3V 11 n c IC306 3 3V_TU IC502 IC503 IC504 2 5 45V Q303 3 3V_PVSB Sw 12 n c Pin Regulator EDID Data 3 0V Pin Dig Ch Only 13 n c 1 Gnd Pin For HDMI 4 0V G 0V 14 n c 2 3 3V Out 1 Gnd 5 5 37V S 3 3V 15 0V 3 4 97V In 2 Gnd 6 5 4V D 3 3V 16 0V 3 Gnd 7 5 4V IC307 1 8V_TU 4 Gnd 8 0V Q304 Driver for 3 3V_PVSB IC301 1 8V_MST Pin Regulator 5 4 52V 9 3 3V Pin Switch Q303 Pin Regulator 1 Gnd 6 4 52V 10 3 ...

Страница 112: ...r Explained Main Board Tuner Explained Front bottom right hand side The Tuner in this set is discreet components Silicon Tuner and no longer a self contained unit can Back Side bottom left hand side Check for Tuner B 3 3V on IC306 and 1 8V on IC307 ...

Страница 113: ...Crystal X1 X402 and X401 Check X1 12Mhz X402 Runs only during On Overtone Crystal X1 Runs all the time Micro Halt Crystal X402 25MHZ X1 X1 X402 1 49V 1 58V 1 48V 1 6V 0 66V 0 54V X401 31 875MHZ X401 Right Side 1V p p Left Side 0 7V p p Right Side 3 50V p p Left Side 2 6V p p Bottom Side 4 2V p p Top Side 2 8V p p ...

Страница 114: ...nnector 1 Using your fingers and press in gently on the two locking tabs Then rock the connector out of the plug 2 Pull the Cable from the Connector by rocking back and forth If the Connector Locks have been damaged and will not release use a thin object and slide straight down as indicated by the arrows below and release the locks P301 or P703 ...

Страница 115: ...Points 1 1 Main Board P703 Location Waveforms Taken from P703 pins 11 and 12 but there are actually 10 pins carrying video Input Signal SMPT Color Bar 10mV per div Pin 11 2uSec per div Pin 12 2uSec per div Pin 11 10uSec per div Pin 12 10uSec per div Pin 1 front row right side Note There are no wires into pins 1 and 2 ...

Страница 116: ...no wires into pins 1 and 2 0 49V 2 79V DISP_EN 25 1 02V 0 59V PC_SER_CLK 23 0 86V 1 37V RA2 21 0 86V 1 31V RB2 19 0 86V 1 23V RC2 17 0 86V 1 26V RCLK2 15 0 86V 1 31V RD2 13 0 86V 1 29V RE2 11 2 6V 3 29V Module_SCL1 9 Gnd Gnd Gnd 7 Gnd Gnd Gnd 5 2 6V 3 29V ROM_RX 3 Open n c n c 1 Diode Check Run Label Pin Gnd Gnd Gnd 26 1 52V 3 24V PC_SER_DATA 24 0 86V 1 13V RA2 22 0 86V 1 18V RB2 20 0 86V 1 27V RC...

Страница 117: ...P704 Connector Main Board to P100 Front Keys Stand By 3 3V 7 8 Intelligent Sensor 1 1 3 4 Soft Touch Key Board Open 0V 0V LED_BLUE 12 0 55V 3 29V 0V 3 3V_MST 11 1 09V 3 29V 3 29V 3 3VST 10 Gnd Gnd Gnd Gnd 9 2 63V 3 29V 0 23V EYE_SDA 8 2 63V 3 29V 0V EYE_SCL 7 Gnd Gnd Gnd Gnd 6 Open 0V 2 72V LED_RED 5 1 73V 3 29V 3 29V Key_CTL_1 4 1 73V 3 29V 3 29V Key_CTL_0 3 Gnd Gnd Gnd Gnd 2 Open 4 9V 3 43V IR 1...

Страница 118: ... turns on M5V Va and Vs c Note The Error Det line is not used in this model d Note If the AC Det line is Missing the TV will turn off in 10 Seconds e Note Pin 18 is grounded on the Main If opened the power supply turns on automatically Front pins are odd Back pins are even Gnd Gnd Gnd e Auto_Gnd 18 Open 3 27V 0V b M_ON 17 2 93V 4 45V 0V d AC Det 16 2 52V 2 43V 0V a RL_ON 15 1 1V 5 23V 3 49V STBY_5...

Страница 119: ...Main Board Speaker Plug P802 Voltage and Diode Check P802 Speaker Connector Diode Mode Check with the Board Disconnected DVM in the Diode mode L L R R Label Open 8 39V 0V 4 Open 8 39V 0V 3 Open 8 39V 0V 2 Open 8 39V 0V 1 Diode Mode Run SBY Pin Main Board Location P802 Connector Main to Speakers Right Right Left Left 1 1 IC801 IC801 Audio Amp Audio Amp ...

Страница 120: ...nt Sensor IC communicate with the Main Board Microprocessor IC1 via Clock and Data lines These boards have no adjustments The Front Control Board IR and Intelligent Sensor receives its operational B from the Main Board 3 3V_ST from the Main Board This voltage is generated on the Main Board IC302 3 3V_MST generated on the Main Board IC303 The Intelligent Sensor sends its data from the IR board to t...

Страница 121: ...he locking g mechanism Slide the board out to the left to release the ribbon mechanism Slide the board out to the left to release the ribbon cable cable To facilitate reinstallation slide the board to the right To facilitate reinstallation slide the board to the right just enough to place a slight bow in the ribbon cable just enough to place a slight bow in the ribbon cable then using a small obje...

Страница 122: ...oard Stand By 3 3V 7 8 Front LEDs and Intelligent Sensor For the Soft Touch Key Pad section For Readings when any Key is touched see Soft Key Pad Section For Key 1 and Key 2 Open 0V 0V LED_BLUE 12 2 25V 3 29V 0V 3 3V_MST 11 2 17V 3 29V 3 29V 3 3VST 10 Gnd Gnd Gnd Gnd 9 2 21V 3 29V 0 23V EYE_SDA 8 2 22V 3 29V 0V EYE_SCL 7 Gnd Gnd Gnd Gnd 6 3 13V 0 0V 2 72V LED_RED 5 2 52V 3 29V 3 29V Key_CTL_1 4 2 ...

Страница 123: ...on entification P101 CONNECTOR Ft IR Board to Ft Key Pad Diode Mode Readings taken with all connectors Disconnected Black lead on Gnd DVM in Diode Mode Measuring Voltage on Pin 1 with DVM turns the TV on If TV is on Input Menu pops up Voltage Measured with a Scope 2 4V 0 16 0 07 8 2 4V 0 16 0 07 7 2 4V 0 16 0 07 6 2 4V 0 16 0 07 5 2 4V 0 16 0 07 4 2 4V 0 16 0 07 3 2 4V 0 16 0 07 2 2 4V 0 16 0 07 1...

Страница 124: ...ess decoder IC to change the key press data into R2 Ladder Resistive data which the Microprocessor can understand This IC is on the Front IR board IC100 which receives key press data from P101 The output from this IC simply selects the appropriate resistor to inject into the Key 1 or Key 2 line which is then interpreted by the Microprocessor in the Main board IC1 IC100 P101 static sensitive key pr...

Страница 125: ...asma Soft Touch Key Pad Soft Touch Key Pad The Soft Touch Key Pad is a thin Static sensitive pad that is adhered to the inside of the front protective shield Soft Touch Key Pad Plastic Frame Lifted up slightly P101 Ribbon Cable ...

Страница 126: ... Soft Touch Key pressed P100 Connector IR LED Control Board to P703 Main No Key Pressed KEY 2 KEY 1 Label 3 29V 3 29V STBY 1 58V 3 29V 4 2 58V 3 29V 3 Diode Mode Run Pin Diode Mode Readings taken with all connectors Disconnected Black lead on Gnd DVM in Diode Mode Menu Enter Volume Volume KEY 1 667V 2 42V 0 214V 0 89V Pin 4 measured from Gnd 0 88V 1 619V 2 1V Pin 3 measured from Gnd Input CH Dn CH...

Страница 127: ...ker system The Full Range Speakers point downward so there are no front viewable speaker grills or air ports Invisible Speaker System Overview Full Range Speakers Invisible Speaker System Overview Full Range Speakers Reading across speaker wires 8 2 ohm p n EAB60962801 Top View Cone View Installed View Remove two screws from the bottom ...

Страница 128: ...ECTION This section shows the Interconnect Diagram called the 11X17 foldout that s available in the Paper and Adobe version of the Training Manual Use the Adobe version to zoom in for easier reading When Printing the Interconnect diagram print from the Adobe version and print onto 11X17 size paper for best results ...

Страница 129: ...3V 1 08V Red Lead on TCP VA Open Black Lead on TCP VA 0 52V TCP TEST REMOVED TCP INSTALLED Red Lead on TCP 3 3V 0 6V Black Lead on TCP 3 3V 0 39V TCP TESTING P100 IR Board to Main P704 Pin Label STBY Run Diode Check 1 IR 3 43V 4 9V Open 2 Gnd Gnd Gnd Gnd 3 Key_CTL_0 3 29V 3 29V 2 52V 4 Key_CTL_1 3 29V 3 29V 2 52V 5 LED_RED 2 72V 0V 3 13V 6 Gnd Gnd Gnd Gnd 7 EYE_SCL 0V 3 29V 2 22V 8 EYE_SDA 0 23V 3...

Страница 130: ...d C 0V C 0V 3 n c 3 5 04V In 3 3 3V 3 3 3V Enable E Gnd E Gnd 4 n c 4 Gnd 4 0V 5 n c IC304 1 2V_DVDD Reg 5 3 3V 5 0V Q302 5V_MST D502 HDMI CEC Limiter 6 n c Pin Dig Ch Only 6 3 3V 6 4 97V Out Pin Switch Pin 7 0V 1 Gnd 7 3 3V G 0V A1 0V 8 3 3V 2 1 2V Out 8 3 3V IC703 RS232 Tx Rx S 5 09V A2 3 28V 9 0V 3 3 3V In Pin D 5 04V C 3 1V 10 Gnd 1 3 3V 11 n c IC306 3 3V_TU IC502 IC503 IC504 2 5 45V Q303 3 3V...

Страница 131: ...11 13 15 17 19 21 2 4 6 8 10 12 14 16 18 20 22 Connector P703 Configuration indicates signal pins 23 25 24 26 15 and 16 are the Video Clock and Data lines 42PJ350 LVDS Video Waveforms 42PJ350 LVDS Video Waveforms ...

Страница 132: ...132 August 2010 42PJ350 Plasma This concludes the Presentation Thank You End of Presentation End of Presentation ...

Результаты поиска

Содержание 42PJ350

Отзывы:

Похожие инструкции для 42PJ350

Бренды по названию

Популярные бренды

LG 42PJ350, Руководство по обучению

Результаты поиска

Содержание 42PJ350

Отзывы:

Похожие инструкции для 42PJ350

Бренды по названию

Популярные бренды