LG 50PJ350 Schematic

4.4 (9)

Advanced Single Scan Troubleshooting

50" Class HD 720p Plasma TV

(50" diagonally)

Training Manual

50PJ350 Plasma Display

Published July 12

, 2010

Updated August 12

, 2010

July 2010 50PJ350 Plasma

Overview of Topics to be Discussed

• Y-SUS Board Delivers Logic Signals and FG5V to lower Y-Drive board.

• Z-SUS Output Board (Also uses one Z-SUB board for bottom panel connector)

• Y-Drive Boards (1 Upper and 1 Lower).

• Control Board

• X Drive Boards (3)

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

• No Main Power Switch (Vacation Switch).

• Interconnect Diagram: 11X17 Foldout Section used as a quick reference sheet.

Lower can run separately, but you MUST remove the Upper completely.

July 2010 50PJ350 Plasma

50PJ350 Plasma Display

The first section will cover Contact Information and Important Safety Precautions

for the Customers Safety as well as the Technician and the Equipment.

Basic Troubleshooting Techniques which can save time and 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 of Topics to be Discussed

July 2010 50PJ350 Plasma

Customer Service (and Part Sales) (800) 243-0000

Technical Support (and Part Sales) (800) 847-7597

USA Website (GSFS) http://gsfs-america.lge.com

Customer Service Website us.lgservice.com

Knowledgebase Website lgtechassist.com

LG Web Training lge.webex.com

LG CS Academy lgcsacademy.com

Published July 2010 by LG Technical Support and Training

LG Electronics Alabama, Inc.

201 James Record Road, Huntsville, AL, 35813.

32LG40, 32LH30, 37LH55, 42LG60, 42LG70, 42LH20, 42LH40, 42LH50, 42LH90, 42SL80,

47LG90, 47LH85, 47LE8500

42PG20, 42PQ20, 42PQ30, 50PG20, 50PJ350, 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)

LG Contact Information

Presentations with Audio/Video

and Screen Marks

New Training Materials on

the Learning Academy site

http://136.166.4.200

New: Software Downloads

Technical Assistance

July 2010 50PJ350 Plasma

IMPORTANT SAFETY NOTICE

The information in this training manual is intended for use by persons possessing an adequate

background in electrical equipment, electronic devices, and mechanical systems. In any attempt

to repair a major Product, personal injury and property damage can result. The manufacturer or

seller maintains no liability for the interpretation of this information, nor can it assume any

liability in conjunction with its use. When servicing this product, under no circumstances should

the original design be modified or altered without permission from LG 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

To avoid personal injury, disconnect the power before servicing this product. If electrical power

is required for diagnosis or test purposes, disconnect the power immediately after performing

the necessary checks. Also be aware that many household products present a weight hazard.

At least two people should be involved in the installation or servicing of such devices.

Failure to consider the weight of an product could result in physical injury.

Preliminary Matters (The Fine Print)

July 2010 50PJ350 Plasma

Today’s sophisticated electronics are electrostatic discharge (ESD) sensitive. ESD can weaken or damage

the electronics in a manner that renders them inoperative or reduces the time until their next failure.

Connect an ESD wrist strap to a ground connection point or unpainted metal in the product. Alternatively,

you can touch your finger repeatedly to a ground connection point or unpainted metal in the product. Before

removing a replacement part from its package, touch the anti-static bag to a ground connection point or

unpainted metal in the product. Handle the electronic control

assembly by its edges only. When

repackaging a failed electronic control assembly in an anti-static bag, observe these same precautions.

Regulatory Information

This equipment has been tested and found to comply with the limits for a Class B digital device, 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 is no guarantee that

interference will not occur in a particular installation. If this equipment does cause harmful interference to

radio or television reception, which can be determined by turning the equipment off and on, the user is

encouraged to try to correct the interference by one or more of the following measures: Reorient or relocate

the receiving antenna; Increase the separation between the equipment and the receiver; Connect the

equipment to an outlet on a different circuit than that to which the receiver is connected; or consult the

dealer or an experienced radio/TV technician for help.

ESD Notice

(Electrostatic Static Discharge)

July 2010 50PJ350 Plasma

Safety & Handling Regulations

1. Check the appearance of the Replacement Panel and Circuit Boards for both physical damage and part number accuracy.

2. Check the model label. Verify model names and board model matches.

3. Check details of defective condition and history. Example: Y-SUS or Y-Drive Board Failure, Mal-discharge on screen, etc.

1. Approximately 10 minute pre-run time is required before any adjustments are performed.

2. Refer to the Voltage Sticker inside the Panel when making adjustments on the Power Supply, Y-SUS and Z-SUS Boards.

3. Always adjust to the specified voltage level (+/- ½ volt) unless otherwise specified.

4. Be cautious of electric shock from the PDP module since the PDP module uses high voltage, check that the Power Supply

and Drive Circuits are completely discharged 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 checks to prevent costly short circuits from damaging the unit.

8. Be cautious of lost screws and other metal objects to prevent a possible short in the circuitry.

9. New Panels and Frames are much thinner than previous models. Be Careful with flexing these panels. Be careful

with lifting Panels from a horizontal position. Damage to the Frame mounts or panel can occur.

10. New Plasma models have much thinner cabinet assemblies and mounts.

Be extremely careful when moving the set around as damage can occur.

Checking Points to be Considered

Safety and Handling, Checking Points

July 2010 50PJ350 Plasma

Basic Troubleshooting Steps

Define, Localize, Isolate and Correct

• Define

Look at the symptom carefully and determine what circuits could be causing the

failure. Use your senses Sight, Smell, Touch and Hearing. Look for burned parts and check

for possible overheated components. Capacitors will sometimes leak dielectric material and

give off a distinct odor. Frequency of power supplies will change with the load, or listen for

relay closing etc. Observation of the front Power LEDs may give some clues.

• Localize

After carefully checking the symptom and determining the circuits to be checked

and after giving a thorough 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 determination of the failure. Look for correct Amplitude

Phasing and Timing of the signals also check for the proper Duty Cycle of the signals.

Sometimes “glitches” or “road bumps” will be an indication of an imminent failure.

• Correct

The final step is to correct the problem. Be careful of ESD and make sure to

check the DC Supplies for proper levels. Make all necessary adjustments and lastly always

perform a Safety AC Leakage Test before returning the product back to the Customer.

July 2010 50PJ350 Plasma

This section of the manual will discuss the specifications of the

50PJ350 Advanced Single Scan Plasma Display Television.

50PJ350 PRODUCT INFORMATION SECTION

July 2010 50PJ350 Plasma

50PJ350 Specifications

1080P PLASMA HDTV

50" Class (50" diagonal)

• 600Hz Sub Field Driving

• High Definition Resolution

• 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

July 2010 50PJ350 Plasma

50PJ350 Logo Familiarization Page 1 of 3

600Hz Sub Field Firing:

Capture every moment. Tired of streaky action or unclear plays during the

game? See sports, fast action and video games like never 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 videos and photos and listen to music on your TV through USB 2.0.

July 2010 50PJ350 Plasma

50PJ350 Logo Familiarization Page 2 of 3

Invisible Speaker

Personally tuned by Mr. Mark Levinson for LG

TAKE IT TO THE EDGE newly introduces ‘Invisible Speaker’ system,

guaranteeing first class audio quality personally tuned by Mr. Mark

Levinson, world renowned as an audio authority. It provides Full Sweet

Spot and realistic sound equal to that of theaters with its Invisible

Speaker.

HD RESOLUTION 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.

Dual XD Engine

Realizing optimal quality for all images

One XD Engine optimizes the images from RF signals as another XD

Engine optimizes them from External inputs. Dual XD Engine presents

images with optimal quality two times higher than those of previous

models.

July 2010 50PJ350 Plasma

50PJ350 Logo Familiarization Page 3 of 3

AV Mode "One click" Cinema, Sports, Game mode.

AV Mode is three preset picture and audio settings. It allows the viewer

to quickly switch between common settings. It includes Cinema, Sports,

and Game Modes.

Clear Voice Clearer dialogue sound

Automatically enhances and amplifies the sound of the human voice

frequency range to provide high-quality dialogue 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 less than 1 Watt in stand by.

Save Energy, Save Money

It reduces the plasma display’s power consumption.

The default factory setting complies with the Energy Star requirements

and is adjusted to the comfortable level to be viewed at home.

(Turns on Intelligent Sensor).

July 2010 50PJ350 Plasma

(600 Hz Sub Field Driving)

• 600 Hz Sub Field Driving is achieved by using 10 sub-fields per frame process

(vs. Comp. 8 sub-field/frame)

• No smeared images during fast motion scenes

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

July 2010 50PJ350 Plasma

50PJ350 Remote Control

TOP PORTION

BOTTOM PORTION

p/n AKB72914201

July 2010 50PJ350 Plasma

50PJ350 Rear and Side Input Jacks

USB for Music, Photos

and Software

Upgrades

AC In

SIDE

INPUTS

REAR

INPUTS

HDMI 3

USB

Composite

Video/Audio

2-3/16"

55.88mm

12-3/16"

309.88mm

50PJ350 Dimensions

28-3/8"

721.36mm

46-1/8"

1170.94mm

Remove 4 screws

to remove stand

for wall mount

Model No.

Serial No.

Label

20-7/8"

530mm

30-13/16"

782.32mm

5-1/4”

133.6mm

2-3/8"

60.96mm

15-3/4"

400mm

15-3/4"

400mm

78.5 lbs with Stand

60.8 lbs without Stand

Weight:

There must be at least 4 inches of Clearance on all sides

340W (Typical)

0.1W (Stand-By)

Power:

7-3/8”

187.2mm

2-3/4"

70mm

17 July 2010 50PJ350 Plasma

15-3/16”

385.8mm

July 2010 50PJ350 Plasma

DISASSEMBLY SECTION

This section of the manual will discuss Disassembly, Layout and Circuit

Board Identification, of the 50PJ350 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.

July 2010 50PJ350 Plasma

Removing 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.

July 2010 50PJ350 Plasma

Circuit Board Layout

Identifying 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

Y-Drive Lower

Z-SUB

FPC FPC

Center “X”

Conductive Tape

Y-Drive Upper

IR/LED

Board

Control

Soft Touch

Keyboard

50PJ350 Connector Identification Diagram

July 2010 50P

J350 Plasma

RIGHT X

Board

CENTER X

Speakers (Front Right)

Z-SUS

Board

P100

P101

Front “Soft Switch” Key Pad

FRONT IR

P101

P102

P812

SC101

P813

SMPS

POWER SUPPLY

Board

P210

P101

P161

CONTROL

Board

P301

P704

P801

MAIN

Board

P231

P121 P212

LEFT X

Board

P203

P212P205

P204

P110

P201P202P203

P101P102P103

Y-SUS

Board

Y-DRIVE

UPPER

Board

Y-DRIVE

LOWER

Board

P122

P101

Speakers (Front Left)

P900

n/c

P111

P162

p/n: EBR63549501

p/n: EAY60968701

p/n: EBR63040301

Z-SUB Board

p/n: EBR63039801

p/n: EBR63551601

p/n: EBR63551701

p/n: EBR64062301

p/n: EBR64062201

p/n: EBR64062001

p/n: EBT60953802

p/n: EAB60962801p/n: EAB60962801

p/n: EBR65007704

P210

P211

P331

P211

P703

P121

P102

n/c

PANEL

p/n: EAJ60716304 (PDP50T10000.ADLGB)

p/n: EAJ60716316 (PDP50T10000.ASLGB)

P202

Top row Odd

Back row Even

LVDS

July 2010 50PJ350 Plasma

Switch Mode Power Supply Board Removal

Disconnect the following connectors: P812, P813 and SC101.

Remove the 9 screws holding the SMPS in place.

Remove the board.

When replacing, be sure to readjust the Va/Vs voltages in accordance with the Panel Label.

Also, re-confirm VSC, -Vy and Z-Bias as well.

Y-SUS Board Removal

Y-Drive Boards Removal

Note: 1) Remember to be cautious of ESD as some semiconductors are CMOS and prone to static failure.

Disassembly Procedure for Circuit Board Removal

Disconnect the following connectors: P210, P211, P212 and Ribbon Cable P110.

To remove P110, lift up on the locking mechanism and pull the ribbon cable out.

Remove the 16 screws holding the Y-SUS in place. Do not run the set with P117 or P118 removed.

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 the following Flexible Ribbon Connectors P101~P103 and/or P201~P203:

Disconnect P212 by pulling the ribbon cable upward. Remove P204 or P110 by lifting up

on the locking mechanism and pull the ribbon cable out. Do not run the set with these

connectors removed. Remove the 3 screws holding either of the Y-Drive boards in place.

Lift up slightly, the slide to the left. Remove the Y-Drive Board.

Note: The Y-SUS does not come with the

connector to the Lower Y-Drive

Board Standoff

Collar

Note: Y-SUS, Z-SUS and Y-Drive boards are mounted on board stand-offs that have a small collar.

The board must be lifted slightly to clear these collars. Behind each board are “Chocolate” (dense rubber

like material) that act as shock absorbers. They may make the board stick when removing.

Note: The Y-SUS does not come with the

connectors between the Y-SUS and Y-Drive

July 2010 50PJ350 Plasma

Z-SUS Board Removal

Main Board Removal

Control Board Removal

Disassembly Procedure for Circuit Board Removal (2)

Disconnect the following connectors: P1 and P2, then P101, P102 and P202 by pulling out the locking

mechanism and pulling out the FPC to the panel.

Remove the 11 screws holding the board in place.

Remove the two screws in the Z-SUB board. Lift up slightly to clear the screw stand-offs and pull the

Z-SUS to the left. Unseat P3/P7 from the Z-SUB board and remove the board.

When replacing, be sure to readjust the Va/Vs voltages in accordance with the Panel Label.

Confirm VS, -Vy and Z-bias as well.

Disconnect the following connectors: P703 LVDS and P301 (press gently inward on the locking tabs)

and pull out, P704 and P801. Remove 1 screw in the decorative plastic piece and remove.

Remove the 4 screws holding the Main board in place and Remove the board.

Disconnect the following connectors: P12 LVDS, P111 Ribbon and P101, P102, P104 Ribbons by lifting

up the locking tab. Remove the 2 screws holding the Control board in place. Lift up the Control board to

unseat it from the two metal supports at the bottom and Remove the board.

FRONT IR/INTELLIGENT SENSOR and POWER BUTTON:

Disconnect P100 and P101. Note: P101 is a ribbon connector. Lift up the locking mechanism and

slide the ribbon cable out. Remove the Board by lifting up on the top tabs, lift the board and remove.

KEY PAD:

The Key Pad is a thin strip of static sensitive material attached to the front glass. It is not removable.

Front IR and Key Pad Removal

Z-SUB Board Removal

Remove the two screws in the Z-SUB board. Remove P202 by pulling out the locking mechanism and

pulling out the FPC to the panel. Remove the board.

July 2010 50PJ350 Plasma

Make sure AC is removed.

Lay the Television down carefully on a padded surface.

Make sure to use at least two people for this process so as not to flex the panel glass.

a) Remove the Back Cover.

b) Remove the Stand (4 Stand Screws were removed during back removal).

c) Remove the Stand Metal Support Bracket (5 Screws) 2 Plastic tap thread and 3 Metal thread.

d) Remove the two Vertical support Braces marked “E”.

Note: There are

5 Screws per/brace, 2 Plastic tap thread and 3 Metal thread.

(Note, the right brace has a Grounding wire from the AC input which must also be removed).

e) Remove the 10 screws holding the Heat Sink. (Warning: Never run the set with 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 two large pieces of conductive tape on the right side of the Right X Board that must

be removed.

Also, note that there several pieces of Chocolate heat transfer material attached all the way across the

underside of the heat sink.

X Drive Circuit Board Removal Continued

X-DRIVE LEFT, CENTER AND RIGHT REMOVAL:

Disconnect all TCP ribbon cables from the defective X-Drive board and all other Ribbon cables going to

the board.

Remove the (3 Left or Right X) or (5 Center X) screws holding the defective X-Drive board in place.

Remove the board. Reassemble in reverse order. Recheck Va / Vs / VScan / -VY / Z-Drive.

July 2010 50PJ350 Plasma

Getting to the X Circuit Boards

Warning:

Never run the TV with the

TCP Heat Sink removed

Left

Right

Heat Sink

Ground

Wire

Warning Shorting Hazard: Conductive Tape. Do not allow to touch energized circuits.

With Stand removed

July 2010 50PJ350 Plasma

Left and Right X Drive Connector Removal

From the Control Board to the X-Boards.

There may be tape on these connectors.

Remove tape (if present) and Gently

pry the

locking mechanism upward and remove the ribbon

cable from the connector.

Gently lift the locking mechanism

upward on all TCP connectors

Left X: P101~108

Center X: P201~207

Right X: P301~308

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 P122

P231, P232

P121, P212

P211, P331

Are the same

Cushion (Chocolate)

TCP

Flexible ribbon cable connector

Va from the

Y-SUS to

Left X Only

P121 to P212

Left to Center X

P211 to P331

Center to Right X

Connectors from Center to Left and

Center to Right X Boards

Example

July 2010 50PJ350 Plasma

TCP (Tape

Carrier

Package) Generic Removal Precautions

Lift up the lock as shown using your fingernail.

(The Lock can be easily broken.

It 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 cable.

Tab

July 2010 50PJ350 Plasma

Left, Center and Right X Drive Removal

Remove the 3 screws in Left or Right X-Boards or 5 in the Center X-Board. (9 Total)

(Some screws are shared between boards)

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

July 2010 50PJ350 Plasma

50PJ350 Plasma Display

This Section will cover Circuit Operation, Troubleshooting and Alignment of the

Power Supply, Y-SUS Board, Y-Drive Boards, Z-SUS Board, Control Board,

Main Board and the X 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

P205

P110

P204

P201

P202

P203

P101

P102

P103

Soft Touch Keys

And Power Button

50PJ350 Signal and Voltage Distribution Block

Display Panel Horizontal

Electrodes Reset, Sustain

Y-SUS Board

P110 / P204

Floating Gnd (FG)

Drive Signals, FG5V

and Vscan.

P210

P101

M5V, Vs, Va

P812

P813

SK101

STB +5V

SMPS

Turn On

Commands

SMPS

Board

Input

Filter

SMPS OUTPUT VOLTAGES IN STBY

Stand By:

STB +5

Logic Signals

To Y-SUS and Y-Drive

P301

P704

P801

MAIN Board

Speakers

X-Board-RightX-Board-Left

P101 P102 P103 P104 P201 P203 P204 P206 P301 P302 P303 P305

RGB Logic

Signals

RGB Logic

Signals

CONTROL

Board

Y Drive

Upper

Z-SUS

Board

P161

P232

P211 P311 P331

Display Panel Vertical Address (Colored Cell Address)

Display Panel

Horizontal

Electrodes

Sustain

16V / M5V

RL_ON

M_On

STB5V, +5V, 17V to Main Board

Vs, Va and M5V to Y-SUS,

SMPS OUTPUT VOLTAGES IN RUN

16V / M5V

Z Drive Control

Signals

IR,

Intelligent Sensor

FPCs

3.3V

STBY

X-Board-Center

P121 P212

P211 P331

P231

P122

P101

P121

P211

Note:

Va not used

by Y-SUS only

fused and routed

to the X-Board

P101

P111

Note: 16V not used

by Control

LVDS

3.3V

FPCs

Y Drive

Lower

5VFG (5V) measured

from Floating Ground

17V, +5V, AC Det

M5V, Va, Vs

3.3V

Key Board

Pull Up

P114

Display Enable

Video

Step 1: RL_ON: 17V, 5V, AC_Det, Error Det,

Step 2: M_On: M5V, Va, Vs

P102

Z-SUB

Board

3.3V

P101

P212

FG5V

FG15V

16V

VSC

-VY

15VFG (15V) measured

from Floating Ground

P100

SMPS TURN ON SEQUENCE

P703

July 2010 50PJ350 Plasma

P202

Scan

Floating Gnd (FG)

Drive Signals, FG5V

P162

P105 P202 P205 P304

Error Com

Run:

AC Det +5, 17V

3.3V

P232

+ 103 hidden pages