LG 50pt81 schematic

PLASMA TV

SERVICE MANUAL

CAUTION

BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

CHASSIS : PP7BA

MODEL : 50PT81 50PT81-ZB

website:http://biz.LGservice.com

Internal Use Only

- 2 -

Only for training and service purposes

CONTENTS

CONTENTS .............................................................................................. 2

SAFETY PRECAUTIONS ..........................................................................3

SPECIFICATION ........................................................................................4

ADJUSTMENT INSTRUCTION .................................................................7

TROUBLE SHOOTING ............................................................................17

BLOCK DIAGRAM...................................................................................28

EXPLODED VIEW .................................................................................. 30

EXPLODED VIEW PARTS LIST ............................................................ 31

REPLACEMENT PARTS LIST ............................................................... 32

SVC. SHEET ...............................................................................................

PRINTED CIRCUIT DIAGRAM ....................................................................

- 3 -

Only for training and service purposes

SAFETY PRECAUTIONS

Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in the Schematic Diagram and Replacement Parts List. It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent X-RADIATION, Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer.

General Guidance

An isolation Transformer should always be used during the servicing of a receiver whose chassis is not isolated from the AC power line. Use a transformer of adequate power rating as this protects the technician from accidents resulting in personal injury from electrical shocks.

It will also protect the receiver and it's components from being damaged by accidental shorts of the circuitry that may be inadvertently introduced during the service operation.

If any fuse (or Fusible Resistor) in this monitor is blown, replace it with the specified.

When replacing a high wattage resistor (Oxide Metal Film Resistor, over 1W), keep the resistor 10mm away from PCB.

Keep wires away from high voltage or high temperature parts.

Due to high vacuum and large surface area of picture tube, extreme care should be used in handling the Picture Tube. Do not lift the Picture tube by it's Neck.

Leakage Current Cold Check(Antenna Cold Check)

With the instrument AC plug removed from AC source, connect an electrical jumper across the two AC plug prongs. Place the AC switch in the on position, connect one lead of ohm-meter to the AC plug prongs tied together and touch other ohm-meter lead in turn to each exposed metallic parts such as antenna terminals, phone jacks, etc. If the exposed metallic part has a return path to the chassis, the measured resistance should be between 1MΩ and 5.2MΩ. When the exposed metal has no return path to the chassis the reading must be infinite. An other abnormality exists that must be corrected before the receiver is returned to the customer.

Leakage Current Hot Check (See below Figure)

Plug the AC cord directly into the AC outlet.

Do not use a line Isolation Transformer during this check.

Connect 1.5K/10watt resistor in parallel with a 0.15uF capacitor between a known good earth ground (Water Pipe, Conduit, etc.) and the exposed metallic parts. Measure the AC voltage across the resistor using AC voltmeter with 1000 ohms/volt or more sensitivity. Reverse plug the AC cord into the AC outlet and repeat AC voltage measurements for each exposed metallic part. Any voltage measured must not exceed 0.75 volt RMS which is corresponds to

0.5mA. In case any measurement is out of the limits specified, there is possibility of shock hazard and the set must be checked and repaired before it is returned to the customer.

Leakage Current Hot Check circuit

1.5 Kohm/10W

To Instrument's exposed METALLIC PARTS

Good Earth Ground such as WATER PIPE, CONDUIT etc.

AC Volt-meter

IMPORTANT SAFETY NOTICE

0.15uF

- 4 -

Only for training and service purposes

SPECIFICATIONS

NOTE : Specifications and others are subject to change without notice for improvement

V Application Range

This spec is applied to the 50” PLASMA TV used PP7BA Chassis.

V Specification

Each part is tested as below without special appointment.

1) Temperature : 25±5°C (77±9°F), CST : 40±5

2) Relative Humidity: 65±10%

3) Power Voltage: Standard Input voltage (100-240V~, 50/60Hz) * Standard Voltage of each product is marked by models.

4) Specification and performance of each parts are followed each drawing and specification by part number in accordance with SBOM.

5) The receiver must be operated for about 20 minutes prior to the adjustment.

V Test Method

1) Performance : LGE TV test method followed.

2) Demanded other specification

Safety : CE, IEC specification EMC : CE, IEC

Chassis

PP7BA 50PT81-ZB EU LG

Model Name Market Brand Remark

50PT81-ZB Safety : IEC/EN60065, EMI : EN55013, EMS : EN55020EU

Model ApplianceMarket

TEST

Remark

V Module Specification1

Panel

PDP Module Outline Dimension 50X4

50X4P

Pixel Pitch 50X4

50X4P

Pixel Format 50X4

50X4P

Pixel Type

No Item Specification Remark

50” WXGA PDP

1190 x 703 x 52

1190 x 700 x 52

0.81 x 0.81 (1 pixel = 3 RGB cells)

1366 x 768 Pixels RGB strip arrangement

1365 x 768 Pixels RGB strip arrangement

RGB Closed type

50X4P

(H)mm x (V)mm x (D)mm

- 5 -

Only for training and service purposes

V Module Specification2

Market

Broadcasting system

Available Channel

Receiving system

Operating Environment

Storage Environment

Power Consumption

Stand by

Frequency range

SCART Jack(2EA)

Video Input (1EA)

S-Video Input (1EA)

Component Input (1EA)

RGB Input (1EA)

HDMI Input (2EA)

RS-232C(1EA)

Audio Input (3 EA)

Audio variable out(1EA)

USB Input(1EA)

No Item Specification Remark

PAL BG/I/DK, NTSC, SECAM

BAND PAL

VHF/UHF C1~C69

CATV S1~S47

Upper Heterodyne

1) Temp : 0 ~ 40 deg

2) Humidity : 10 ~ 90 %RH

1) Temp : -20 ~ 50 deg

2) Humidity : 10 ~ 90 %RH

Power on < 500

(Green)

Cool < 1W

Warm < 55W

H : 31 ~ 61Khz

V : 56 ~ 75Hz

PAL, SECAM

PAL, SECAM, NTSC

Y/Cb/Cr, Y/ Pb/Pr

RGB-PC

HDMI-PC, HDMI-DTV

Remote control, S/W Upgrade

PC Audio, Component (1EA),

SIDE AV(1EA)

DivX, MP3, JPEG

1/8W non-clipped max. audio signal.

Input voltage 198Vac/60HZ .

Full White video input.

PC Input

FULL SCART, HALF SCART

SIDE AV

SIDE S-VIDEO

L/R Input

SIDE(1EA)

- 6 -

Only for training and service purposes

ADJUSTMENT INSTRUCTION

1. Application Object

These instructions are applied to all of the 50” PLASMA TV,

PP7BA Chassis.

2. Note

(1) Because this is not a hot chassis, it is not necessary to use

an isolation transformer. However, the use of isolation

transformer will help protect test instrument. (2) Adjustment must be done in the correct order. (3) The adjustment must be performed in the circumstance of

25±5°C of temperature and 65±10% of relative humidity if

there is no specific designation. (4) The input voltage of the receiver must keep 100-220V~,

50/60Hz. (5) Before adjustment, execute Heat Run for 30 minutes.

3. Adjustment items

3.1. PCB assembly adjustment items

(1) Channel memory

1) Download the channel data from BOM to EEPROM by using LGIDS.

(2) Option adjustment following BOM

1) Push the ADJ key in the Adjust Remocon.

2) Input the Option Number that was specified in the BOM, into the Shipping area.

3) Select “Tool Option1/ Tool Option2/ Area Option” by using

D/E

(CH+/-) key, and press the number key(0~9)

consecutively.

ex) If the value of Tool Option1 is 7, input the data using

number key “7”(Fig.1).

(3) Color carrier Adjustment.

3.2. SET assembly adjustment items

(1) Auto AV Color Balance. (2) Adjustment of White Balance. (3) Auto Component Color Balance adjustment.

- standard equipment : MSPG925FA.

(4) Auto RGB Color Balance adjustment.

- standard equipment : MSPG925FA

( At DVR model Case, Please check DVR function like

following list ) (5) Checking DVR Function and HDD * Check DVR Function as follow on 4-2 and find HDD failure under malfunction.

4. HDD assembly adjustment method

4-1. HDD Format

1) Assemble MAIN , DVR Board.

2) HDD Format in progress words will create automatically.

3) Please, wait for 30~40 seconds.

(1) HDD Format in progress.

(2) HDD Format completed.

4-2. Sub Program Download for “DVR” by

using USB memory stick

(1) Connect USB memory stick to SET. (2) Set power off -> On

- DVR s/w will be installed automatically.

PPBA/BB 50X4PPPBA/BB 50X4P WXGA WXGA

(Fig.1)

- 7 -

Only for training and service purposes

5. POWER PCB Assy Voltage Adjustments (Va, Vs Voltage adjustments)

5-1. Test Equipment : D.M.M. 1EA

5-2.Connection Diagram for Measuring

: refer to Fig.2

5-3. Adjustment Method

(1) Va Adjustment

1) After receiving 100% Full White Pattern, HEAT RUN.

2) Connect + terminal of D.M.M to Va pin of P812, connect

- terminal to GND pin of P812.

3) After turning VR501, voltage of D.M.M adjustment as same as Va voltage which on label of panel right/top. (Deviation; ±0.5V)

(2) Vs Adjustment

1) Connect + terminal of D.M.M to Vs pin of P812, connect – terminal to GND pin of P812.

2) After turning VR401, voltage of D.M.M adjustment as same as Va voltage which on label of panel right/top. (Deviation; ±0.5V)

6. ADC Calibration

* Press the FRONT-AV Key on R/C for converting input mode.

(Change RS-232 Host : pc, BaudRate : 115200bps)

7. EDID

7-1. EDID Data

Each PCB assembly must be checked by check JIG set. (Because power PCB Assembly damages to PDP Module, especially be careful)

* Use the proper signal cabel for EDID Download

- Analog EDID : Pin3 exists

- Digital EDID : Pin3 exists * Never connect HDMI & DVU-D & DVI-A Cable at the same time. * Use the proper cables below for EDID Writing * HDMI 1 and HDMI2 is different each other. So you have to

Download different EDIT File.

(Fig.2) Connection diagram of power adjustment for measuring

For Analog EDID

D-sub to DVI-I DVI-D to DVI-D

For Digital EDID

For HDMI EDID

DVI-D to HDMI or HDMI to HDMI

Manufaturer

Version

Revision

GSM

Digital : 1

Digital : 3

1E6D

ConditionItemNo Hex Data

MSPG925FA

Component RGB-PCRF/AV/S-VIDEOADC

Model : 60

(1024*768 60Hz)

Pattern : 65

*100% Color Bar

Model:217(720P)

Pattern : 65

*100% Color Bar

PAL

INPUT AV1 - TB

SELECT AV3 - ZF

Model : 202

(PAL-BGDHI)

Pattern : 65

*100% Color Bar

- System control RS-232 Host should be “PC“ for adjustment.

- 8 -

Only for training and service purposes

7-2. Analog(256Byte)

(1) BLOCK1(128Byte)

7-3. HDMI(256Byte)

(1) BLOCK1(128Byte)

(2) BLOCK2(128Byte)

=> Detail EDID Options are below([1], [2], [3],[4], [5])

1. [1]-Product ID

2. [2]-Serial No : Controlled on production line

3. [3]-Month, Year : Controlled on production line ex) Week : '03' => '03'

Year : '2005' => '0F'

4. [4]-Model Name(Hex):

5. [5]-Checksum : Changeable by total EDID data

8. Adjustment of RF/AV/S-VIDEO

8-1. Requirement

(1) This AV color balance adjustment should be performed

before white Balance Adjustment.

(2) After AV color balance adjustment, Change the mode from

AV to RF.

8-2. Required Equipment

(1) Remote controller for adjustment. (2) 802F Pattern Generator, Master(MSPG-925FA), etc. (3) MSPG-925FA Pattern Generator.

(Which has Video Signal : 100% Color Bar Pattern shown in

Fig.3)

-> Model : 202 / Pattern : 65

8-3. Method of Auto RF/AV/S-VIDEO Color

Balance

(1) Press the FRONT-AV KEY on R/C for converting input

mode. (2) Input the Video Signal: 100% Color Bar signal into AV. (3) Set the PSM to Dynamic mode in the Picture menu. (4) Press INSTART key on R/C for adjustment. (5) Press the

G(Vol.+) key to operate the set, then it becomes

automatically. (6) Auto-RGB OK means the adjustment is completed.

(Fig. 3)

Model

Name

42PB4RT

50PB4RT

42PT81

50PT81

Product ID

EDID tableHex

LG TV

00 00 00 FC 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20

Model Name

9. Adjustment of Component

9-1. Required Equipment

(1) Remote controller for adjustment. (2) 802F Pattern Generator, Master(MSPG-925FA), etc. (3) MSPG-925FA Pattern Generator.

(Which has 720P@60Hz YPbPr Signal : 100% Color Bar

Pattern shown in Fig.4)

-> Model : 217 / Pattern : 65

(4) It is very import to use correct adjustment pattern like

Fig.4.

1) Within the pattern, color sequence should be aligned : White-Yellow-Cyan-Green-Gray-Red-BLUE-BLACK

( If color sequence is reversed (Black -> ...-> White),

reverse the pattern with REV key, when using Master pattern generator like MSPG-925)

2) If Minimum Black Level and/or Maximum White Level is

not correct, Do select 100% Color Bar Pattern.

9-2. Method of Auto Component Color Balance

(1) Input the Component 720p 100% Color Bar(MSPG-925FA

model:217, pattern:65) signal into Component. (2) Set the PSM to Dynamic mode in the Picture menu. (3) Press the INSTART key on R/C for adjustment. (4) Press the

G(Vol.+) key to operate the set , then it

becomes automatically. (5) Auto-RGB OK means the adjustment is completed.

10. Adjustment of RGB

10-1. Required Equipment

(1) Remote controller for adjustment. (2) 802F Pattern Generator, Master(MSPG-925FA), etc. (3) MSPG-925FA Pattern Generator.

(Which has XGA [1024*768] 60Hz PC Format output signal :

100% Color Bar Pattern shown in Fig.5)

(4) It is very import to use correct adjustment pattern like

Fig.5.

1) Within the pattern, color sequence should be aligned : White-Yellow-Cyan-Green-Gray-Red-BLUE-BLACK

( If color sequence is reversed (Black -> ...-> White),

reverse the pattern with REV key, when using Master pattern generator like MSPG-925)

2) If Minimum Black Level and/or Maximum White Level is

not correct, Do select 100% Color Bar Pattern.

10-2. Method of Auto RBG Color Balance

(1) Input the Component 720p 100% Color Bar(MSPG-925FA

model:217, pattern:65) signal into Component. (2) Set the PSM to Dynamic mode in the Picture menu. (3) Press the INSTART key on R/C for adjustment. (4) Press the

G(Vol.+) key to operate the set , then it

becomes automatically. (5) Auto-RGB OK means the adjustment is completed.

- 9 -

Only for training and service purposes

(Fig. 4)

- 10 -

Only for training and service purposes

11. White Balance

* Notice

- Do the white balance adjustment under the 10LUX

- Before white balance, press the In-start key 2times and do

the reset like Fig.6

- Use the Torino inner pattern(216 gray pattern)

- To enter White-balance mode,press the IN-START key

2times.

11-1. Test Equipment

(1) Color Analyzer (CA-100),CA-210.

* Note : When using the Color Analyzer with PDP,

recommend the CA-100 more than CA-210. If CA-100 can not available, it is also good th use the CA-210

(2) PC(for communication through RS-232C)

-> UART Baud rate : 115200.

(3) Pattern Generator(MSPG-925FA etc.)

11-2. Color Temperature & Color

Coordinates Setting

(1) When adjusting the Color Temperature of PDP, Color

Analyzer CA-210(Matrix should be corrected through CH10 of CS-1000) should be used. When CA-210 have used, it don’t need to fit the CH10.

(2) Adjust the Color Temperature based below adjustment

color coordinates.

(3) Even if CH9 of CA-210 is corrected with Matrix, there may

be many character of Module and Filter.

(4) Therefore Refer to the below Color Coordinates Target.

But, in case of WCG module, use the CH12 of CA-210.

W Target Value CA-210(CH10), CA-100

( R/G/B gain and R/G/B offset Default values are different in

according to using module)

Target Value of Brightness, Color Coordinates, Color Temperature

11-3 .Manual white Balance (INNER Pattern)

(For White Balance, Adjust twice, Cool and Warm)

(1)

Execute CA-100, CA-210(10CH) or CA-100 Zero Calibration.

(2) Use torino inner pattern as below Fig.7, Supply 216Level

(85 IRE) full screen pattern

(3) Enter the White Balance adjustment mode by pressing the

INSTART key twice(White Balance) on R/C.

(4) Stick sensor to center of the screen and select each items

(Red/Green/Blue Gain and Offset) using

D/E (CH+/-) key

on R/C.

(5) Adjust with R / G / B Gain using

F/G (VOL+/-) key on R/C.

(6) Adjust it until color coordination becomes as below.

W Color Temperature : Cool, Medium, Warm

(1) One of R/G.B Gain should be fixed at 80 and adjust two

Gain Value with decreasing the Default values from 80

1) When R Gain is Fixed at Default value(80)

- Adjust G gain and B gain with decreasing Default values

from 80

2) When B Gain is Fixed at Default value(80)

- Adjust R gain and G gain with decreasing Default values

from 80

3) When G Gain is Fixed at Default value(80)

- Adjust R gain and B gain with decreasing Default values

from 80

(2) R/G/B Gain and R/G/B Offset Default Value.

- Red Gain : 80

- Green Gain : 80

- Blue Gain : 80

(Fig.6)

80 8080 80 7D 8080 8C

- Before White-balance, the AV ADC should be done.

- System control RS-232 Host should be “PC“ for adjustment.

- After All adjustment is completed, Please push “Instop” Key.

Temp x

0.276±0.002

0.313±0.002

0.283±0.002

0.329±0.002

+0.000

+0.003

11,000K

6,500K

COOL

WARM

CSM y

High Light

60 ± 20cd/m2(42XGA)

Cool X: 0.276±0.002, Y: 0.283±0.002

Normal X: 0.313±0.002, Y: 0.329±0.002

Cool 11,000±500K

Warm 6,500K±500K

Brightness

Color

-Coordinate

Desired result (216 Gray)

(Fig.7)

Color Temperature

High Light

50 ± 20cd/m2(80% of non-high altitude)

Cool X: 0.276±0.002, Y: 0.283±0.002

Normal X: 0.313±0.002, Y: 0.329±0.002

Cool 11,000±500K

Warm 6,500K±500K

Brightness

Color

-Coordinate

Desired result for high altitude(216 Gray)

Color Temperature

- 11 -

Only for training and service purposes

11-4 .Auto white Balance (INNER Pattern)

Input Select

R-Gain_Normal

G-Gain_Normal

B-Gain_Normal

R-Gain_Warm

G-Gain_Warm

B-Gain_Warm

R-Gain_Cool

G-Gain_Cool

B-Gain_Cool

R-Offset_Normal

G-Offset_Normal

B-Offset_Normal

R-Offset_Warm

G-Offset_Warm

B-Offset_Warm

R-Offset_Cool

G-Offset_Cool

B-Offset_Cool

COLOR TEMP.

Inner Pattern Signal

00h

01h

10h

11h

20h

21h

40h

41h

60h

90h

Min

00h

Max

80h

03h(Cool,Normal,Warm,User)

W/B Adjustment Start

Using Internal Pattern W/B

Adjustment Completion

DTV-Air

Cable

RF-Air

Cable

AV1

AV2

COMP1

RGB-PC

HDMI

INIT

80h

No Command1 Command2 Set ID

Data

Mode

- 12 -

Only for training and service purposes

Input Select Data

: RF(10), AV1~4(20,21,22,23), SAV(30), COMP(40), DVI(50 or 60), HDMI(90)

Command Set

( SET ID : 0 -> ALL, 1~99 -> each SET )

POWER ON/OFF

MAIN INPUT

ARC

SCREEN MUTE

AUDIO MUTE

VOLUME

CONTRAST

BRIGHTNESS

COLOR

TINT

SHARPNESS

OSD ON/OFF

CHILD LOCK

PIP MODE

PIP ARC

PIP POSITION

TREBLE

BASS

BALANCE

COLOR TEMP.

RED LEVEL

GREEN LEVEL

BLUE LEVEL

PIP INPUT

CURRENT STATE

KA(ka)

XB(xb)

KC(kc)

KD(kd)

KE(ke)

KF(kf)

KG(kg)

KH(kh)

KI(ki)

KJ(kj)

KK(kk)

KL(kl)

KM(km)

KN(kn)

KO(ko)

KQ(kq)

KR(kr)

KS(ks)

KT(kt)

KU(ku)

KV(kv)

KW(kw)

K$(k$)

XY(xy)

KZ(kz)

0~99

0~1

10~90

1~8

0~1

0~64

0~1

0~3

0~64

0~3

0~50

10~90

0: OFF, 1:ON

RF(10), AV1~4(20,21,22,23),

SAV(30), COMP(40),

RGB(50 or 60), HDMI(90)

4:3; 16:9; SPECTACLE; ZOOM;

ORIGINAL; 14:9; FULL

1: MUTE, 0: MUTE OFF

0: 0, 64 : 100 (Hexadecimal)

0: 0 , 64 : 100 (Hexadecimal)

0: R50 , 64 : G50 (Hexadecimal)

0: 0 , 64 : 100 (Hexadecimal)

0: OFF, 1: ON

1: LOCK, 0: OFF

PIP_OFF, PIP, DW1, DW2

NOT USED

0:0 , 64:100

0:L50, 64:R50

COOL, NORMAL, WARM, USER

0 : -40, 50 : 40

RF(10), AV1~4(20,21,22,23),

SAV(30), COMP(40),

DVI(50 or 60), ,HDMI(90)

ACK is 0, there is Signal

ACK is 1, there is No Signal

ACK is 2, power Off Status

No Adjustment contents CMD SET ID

VAL

Specification

- 13 -

Only for training and service purposes

RED GAIN

GREEN GAIN

BLUE GAIN

RED OFFSET

GREEN OFFSET

BLUE OFFSET

AUTO CONFIG.

SELECT PR.

SELECT SUB PR.

IR CODE

Red,Blue,Green Gain

Red,Blue,Green offset

WHITE BALANCE “J”(A~F)

TUNER CONTROL

ADC Calriblation

FACTORY IR

Ja,Jb,Jc

Jd,Je,Jf

0~99

00<E0

00<90

0~3F

0~C7

Over F0

Min:00

Max:fe

Min:00

Max:fe

0:0, 3F:3F , FF: Current State

The state is not Auto Adjust Condition

Send NACK

0: Pr. 0, C7: Pr.199

IR CODE 0, BITMASK = 0X01

Initial Value : red -0x79

blue -0x6f

green -0x80

Initial Value : red -0x80

blue -0x82

green -0x80

No Adjustment contents CMD SET ID

VAL

Specification

- 14 -

Only for training and service purposes

Tool Option1

Tool Option2

Area Option Option1

Option2

Option3

Option4

System Control1

System Control2

Power-off History

Panel Control

Fan Control

Maker

Inch

Tool

Tuner Num.

EYE

INDEX

VFD

HDMI Type(A)

Rear AV

BOOST

Full

Soft Touch

Reserved

CMO

Option Detail List

Data

Remark

12. Detail list of SVC Option data

- 15 -

Only for training and service purposes

13. Shipped condition

(1) 1) Push the IN-START key in a Adjust Remocon. (2) Input the Option Number that was specified in the BOM, into the Shipping area. (3) The work is finished, Push

V Key.

STATION Auto Tuning

Manual Tuning

Promgrame Edit

Favourite Prog.

PICTURE Picture Mode

Color Temperature

Advanced

Aspect Ratio

Picture Reset

Screen

XD Demo

SOUND Sound Mode

Auto Volume

Balance

TV Speaker

TIME Clock

Off Time

On Time

Sleep Time

Auto Sleep

STATION SPECIAL Language

Country

Input Label

SIMPLINK

Key Lock

Set ID

DVR Time Control

Recorded TV

Manual Recording

Scheduled List

Video Quality

HDD Format

System/Storage From/Start

Storage/System/Band/Channel/Fine/S

earch/Name

To Set

-- -- --

Dynamic/Standard/Mild/User1/User2

Cool

Auto

Cinema : Off

Black Level : Disable

Spectacle/Full/Original/4:3/

16:9/14:9/Zoom1/Zoom2

To Set

Disable

SRS TSXT/ Standard/ Music/

Movie/ Sports/ User

Off

Year -- : --

Date -- : --

Time -- : --

Off

00 : 00

Off

00 : 00

Volume 30

Programme 0

Off

To Set

Off

To Set

High

To Set

No Item

Condition

Remark

- 16 -

Only for training and service purposes

TROUBLESHOOTING

1. No power

(1) Symptom

1) Minute discharge does not occur at module.

2) Front LED does not activate.

(2) Press check

Plug in the power cord

Start Check

Yes

Is the power cord plugged in?

Connect the cable. Plasma(

)

Yes

Are the line filter and PSU connected?

Replace the fuse.

Yes

Is the

correct fuse for

the PSU in place?

Plasma(F101)

Connect the 13pin cable.

After remove all cables connected PSU(except the CN101), authorizes the AC voltage marking manual. If the ST-by 5V does not operate, replace the PSU.

Yes

Is the PSU and 13pin

cable connected to the

VSC board?

- 17 -

Only for training and service purposes

2. Protect mode

(1) Symptom

1) After lighting once it does not discharge minutely from the module.

2) The relay falls.(there is an audible “Click”.)

3) The color of the front LED turns from green to red.

(2) Follow check

Is the PSU normal ?

Replace Power Board.

Is the output the normal Low/High voltage except for the Stand-by 5V?

Yes

Are all the connectors

normal?

Replace the connector.

Replace the fuse.

Replace the Y-Board.

After checking each connector does is operate correctly?

Yes

Is the Y-Board

normal?

Is the appropriate

fuse (FS2,FS3) on the

Y-B/D?

Is the output voltage normal after removing the P1 connector of the Y-B/D?

Yes

Replace the Z-Board.

Is the Z-Board

normal?

Is appropriate

fuse (FS1,FS2) on

the Z-B/D?

Is the output voltage

normal after removing

the P1 connector of

the Z-B/D?

Yes

Is the X- Board

normal?

Is the

output voltage normal

after removing the P100, 110,

200, 210 connector of

the X-B/D?

After removing the P100, 110 and the output voltage is normal : Replace the Right X-B/D After removing the P200, 210 and the output voltage is normal : Replace the Left X-B/D

Yes

Replace the fuse.

Yes

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