LG 50PX4RA User manual

PLASMA TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : MF-056A
MODEL : 50PX4RA
50PX4RA-TA
website:http://biz.LGservice.com
e-mail:http://www.LGEservice.com/techsup.html

- 2 -
CONTENTS
SAFETY PRECAUTIONS ....................................................................................3
DESCRIPTION OF CONTROLS..........................................................................4
SPECIFICATIONS................................................................................................8
ADJUSTMENT INSTRUCTIONS .......................................................................10
TROUBLE SHOOTING GUIDE..........................................................................14
BLOCK DIAGRAM.............................................................................................23
EXPLODED VIEW..............................................................................................24
EXPLODED VIEW PARTS LIST........................................................................25
REPLACEMENT PARTS LIST...........................................................................26
SCHEMATIC DIAGRAM.........................................................................................
PRINTED CIRCUIT BOARD ..................................................................................

- 3 -
SAFETY PRECAUTIONS
Many
electri
cal
and
mechan
General Guidance
An isolation
Transformer should always be used
dur
ing
the
servi
c
ing of
a
rece
iver
whose
ch
ass
is
is not
iso
l
ate
d
from the
A
C
power
l
ine.
Use
a
transfor
mer of
a
de
qu
ate
power
rat
ing
as
thi
s
prote
cts
the
techn
i
c
i
an
from
a
c
c
i
dents
result
ing
in
person
a
l
in
jury
from
ele
ctr
i
c
a
l
sho
c
ks.
It
wi
l
l
a
lso
prote
ct the
rece
iver
an
d
it
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

MODE
INPUT
TV
DVD
VCR
PIP
ZOOM -
ZOOM +
MUTE
TEXT/
*
SLEEP
LIST
I/II
AUDIO
PIP PR -
PIP PR +
SWAP
PIP INPUT
STB
MENU
ARC
SSM
FAVOURITE
SIZE POSITION INDEX HOLD
TIME REVEAL MIX MODE
Q.VIEW
PSM
OK
VOL PR
MULTIMEDIA
POWER
CABLE
M
?
EXIT
MULTIMEDIA
Selects the Component, RGB or HDMI
modes.
switches the set on from standby.
PIP
Switches the sub picture on or off.
Selects PIP or DW modes.
PIP PR + /-
Selects a programme for the sub picture.
SWAP
Alternates between main and sub picture.
PIP INPUT
Selects the input mode for the sub picture.
SIZE
Adjusts the sub picture size.
POSITION
Moves the sub picture to DD/ EEor FF/ GG
direction.
POWER
switches the set on from standby or off to
standby.
ARC
Changes the picture format.
OK
accepts your selection or displays the cur-
rent mode.
DD/ EEor FF/ GG
Adjusts menu settings.
Selects menu item.
MENU
Displays on screen menus one by one.
Exits the current menu.
Memorizes menu changes.
ZOOM - / ZOOM +
Enlarges or reduces the main picture size.
TEXT/
*
These buttons are used for teletext.
For further details, see the ‘Teletext’ section.
Note : In teletext mode, the PIP PR +/-,
SWAP and PIP INPUT buttons are used for
teletext function.
SSM
To select the sound appropriate to your
viewing programme.
NUMBER buttons
SLEEP
Sets the sleep timer.
I/II
Selects the language during dual lan-
guage broadcast.
Selects the sound output.
LIST
Displays the programme table.
INPUT
Selects the TV, AV, Component, RGB or
HDMI modes.
switches the set on from standby.
MODE
Selects another device.
MUTE
Switches the sound on or off.
VOL +/- (Volume Up/Down)
Increases/decreases sound level.
PR +/- (Programme Up/Down)
Selects a programme.
PSM
Adjusts the factory preset picture accord-
ing to the room.
Q.VIEW
Returns to the previously viewed pro-
gramme.
FAVOURITE
selects a favorite programme.
EXIT
Clears all on-screen displays and returns
to TV viewing from any menu.
VCR BUTTONS
Controls a LG video cassette recorder.
- 4 -
DESCRIPTION OF CONTROLS

- 5 -
<Front Panel Controls>
PR
VOL
MENUTV/AV
OK
PR
VOL
MENUINPUT OK
21 3 4 5 6
7
1. Power Button
Switches the set on from standby or off to standby.
2. Remote Control Sensor
3. INPUT Button
Selects the TV, AV, Component, RGB or HDMI modes.
Switches the set on from standby.
4. MENU
Displays on screen menus one by one.
Exits the current menu.
Memorizes menu changes.
5. OK
Accepts your selection or displays the current mode.
6. DD/ EE(Programme Up/Down)
Selects a programme or a menu item.
Switches the set on from standby.
FF/ GG(Volume Up/Down)
Adjusts the volume.
Adjusts menu settings.
7. Power Indicator
Illuminates red in standby mode, Illuminates green when the
set is turned on.

- 6 -
<Back Panel>
S-VIDEO
VIDEOAUDIOR
L/MONO
A/V INPUT2A/V INPUT2
AC INPUT
RS-232C INPUT
(CONTROL/SERVICE)
S-VIDEOS-VIDEO
(MONO)
AUDIOAUDIO
L R
AUDIOAUDIO
L R
AUDIOAUDIO
L R
Antenna
VIDEOVIDEO
REMOTE
CONTROL
HDMI/
DVI(VIDEO)
AUDIO INPUT
RGB INPUT
VIDEOVIDEO
COMPONENTCOMPONENT INPUTINPUT 22
COMPONENTCOMPONENT INPUTINPUT 11
MONITMONITOR OUTPUTOR OUTPUT
A/V INPUTA/V INPUT 11
VVARIABLEARIABLE AUDIO OUTAUDIO OUT
1. HDMI(DVI VIDEO) / AUDIO INPUT / RGB INPUT
Connect the monitor output socket of the PERSONAL COM-
PUTER, DVD or STB to this socket.
Note: If you want to use RGB/DVI audio, we strongly
recommend that you use the cable that has a core, or the
EMI Filter core along with separate cable.
2. REMOTE CONTROL
3. RS-232C INPUT(CONTROL/SERVICE) PORT
Connect to the RS-232C port on a PC.
4. COMPONENT INPUT
Connect DVD video outputs to Y, PB, PRof COMPONENT
INPUT and audio outputs toAudio sockets of AUDIO INPUT.
5. VIDEO/AUDIO IN/OUT SOCKETS (A/V INPUT 1)
Connect the video/audio out sockets of external equipment
to these sockets.
S-VIDEO/AUDIO IN SOCKETS
Connect the S-VIDEO out socket of an VCR to the S-VIDEO
socket.
Connect the audio out sockets of the VCR to the audio sock-
ets as in A/V INPUT 1.
6. VARIABLE AUDIO OUTPUT
7. ANTENNA INPUT
8. POWER CORD SOCKET
This Monitor operates on AC power. The voltage is indicated
on the Specifications page. Never attempt to operate the set
on DC power.
9. AUDIO/VIDEO INPUT (A/V INPUT 2)
S-VIDEO/AUDIO IN SOCKETS
14
2 3 5 7 86
9

- 7 -
AS mark
LG TV
Owner’s Manual
1.5V
1.5V
Alkaline batteries Power Cord
MODE
TV/AV
TV
DVD
VCR
PIP
ZOOM-
ZOOM+
MUTE
TEXT/
*
SLEEP
LIST
I/II
AUDIO
PIPPR -
PIPPR +
SWAP
PIPINPUT
STB
MENU
ARC
SSM
FAVOURITE
SIZE POSITION INDEX HOLD
TIME REVEAL MIX MODE
Q.VIEW
PSM
OK
VOL PR
MULTIMEDIA
POWER
CABLE
M
?
EXIT
Remote Control handset
-Optional extras can be changed or modified for quality improvement without any notification new optional extras can be
added.
- Contract your dealer for buying these items.
Optional Extras
Accessories
Accessories
Tilt wall mounting bracket Video cables Audio cables
Ceiling mounting bracket
40
42
50
42
40
-Secure the TV assembly by joinning it to a wall by using the Eye Bolts/Wall brackets.
Joinning the TV assembly to the wall to protect the set tumbling
•After the set must be mounted on a desktop, install the Eye Bolts on the set as
shown.
Insert the 2 Eye Bolts and tighten securely, in the holes on the bracket.
Install the wall brackets on the wall with 2 bolts, (not supplied with the product),
as shown.
Match the height of the Eye Bolts and the wall brackets.
Check to be sure the brackets are tightened securely.
• Secure the TV assembly to the wall with strong strings or wound wire cables,
(not supplied with the product), as shown.
2-Wall brackets
2-Eye Bolts

SPECIFICATIONS
NOTE :
Specif
icat
ions and
others are
subject to
change
without notice
for
improve
ment
.
- 8 -
VApplication Range
This spec is applied to the 50”PDP TV used MF-056A 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 BOM.
5)
The receiver must be operated for about 20 minutes prior to the adjustment .
VTest Method
1) Performance : LGE TV test method followed.
2) Demanded other specification
Safety: CE, IEC specification
EMC : CE, IEC
VGeneral Specification
1. General Specification
Remark
Safety : IEC60065, EMI : CISPRI3
Model Name
50PX4RA-TA
Market
Non-EU
Remark
PDP
LGE SPEC
Maker : SONY/ Murata/ Sanken
Specification
50 inch wide Color Display Module
16:9
PDP50V3xxxx
RGB Closed Type, Glass Filter
1) Temp : 0~40 deg
2) Humidity : 0~85%
1) Temp : -20~60 deg
2) Humidity : 0~85%
100-240V~, 50/60Hz
No
1
2
3
4
5
6
Item
Display Screen Device
Aspect Ratio
PDP Module
Operating Environment
Storage Environment
Input Voltage

2. Model Specification
2.1. 42PX4RV-TA
- 9 -
Item
Market
Broadcasting system
Available Channel
Receiving system
Video Input (2EA)
Video Output(1EA)
S-Video Input(2EA)
Component Input(2EA)
RGB Input(1EA)
HDMI Input(1EA)
Audio Input(5EA)
Wired Control
Audio variable out
No
1
2
3
4
5
6
7
8
9
10
11
12
13
Specification
Non-EU
PAL B/G/I/D/K, NTSC
BAND PAL NTSC
VHF/UHF C1~C69 2~83
CATV S1~S47 1~71
Upper Heterodyne
PAL, SECAM, NTSC
PAL, SECAM, NTSC
PAL, SECAM, NTSC
Y/Cb/Cr, Y/Pb/Pr
RGB-PC
RGB-DTV
HDMI-PC
HDMI-DTV
PC Audio, Component(2EA), AV(2EA)
Remark
4 System :
PAL, SECAM, NTSC,PAL60
4 System : PAL, SECAM, NTSC,PAL60
4 System : PAL, SECAM, NTSC,PAL60
L/R Input

- 10 -
ADJUSTMENT INSTRUCTIONS
1. Application Object
These instructions apply to the MF-056A Chassis.
2. Specification
(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) The receiver must be operated for about 15 minutes prior
to the adjustment.
OAfter RGB Full white HEAT-RUN Mode, the receiver must
be operated prior to adjustment.
OEnter into HEAT-RUN MODE
1) Press the POWER ON KEY on R/C for adjustment.
2) OSD display and screen display 100% full WHITE
PATTERN.
[Set is activated HEAT-RUN without signal generator in
this mode.
[Single color pattern(RED/BLUE/GREEN) of HEAT-RUN
mode uses to check PANEL.
Caution) If you turn on a still screen more than 20 minutes
(Especially digital pattern, cross hatch pattern), after
image may be occur in the black level part of the
screen.
3. Channel memory
3-1. Setting up the LGIDS
1) Install the LGIDS. (idsinst.exe)
2) After installation, restart your PC.
3) Extract [files.zip] to folder [c:\LGIDS\files].
4) Start LGIDS.
3-2. Channel memory Method
1) Select “PDP” and “Hurricane” on Model dialog. And check
your connection in Communication dialog. (If your
connection is ‘NG’, then set your PORT(COM1,2,3,...)
correctly.)
2) Connect RS-232C cable and turn on the power.
(If your connection has completed, you can see “Ready”.)
[If your set is not an end products but only a board, you
have to make your board to Stand-by state (LED_R). And
you have to Download in Stand_by power state.
3) Select proper CH_memory file(*.nvm) for each model at
[NVRAM Download] $ [Write Batch]
Next, select proper binary file(*.bin) including the CH
information for each model at [NVRAM File].
4) Click the [Download] button.
It means the completion of the CH memory download if all
items show ‘OK’ and Status is changed by ‘PASS’ at the
lower right corner of the window.
5) If you want to check whether the CH information is
memorized correctly or not, click the [Verify] button.
And then compare NVRAM File(*.bin) with the CH
information downloaded.
3-3 Sub program download
1) Select “PDP” and “Hurricane” on Model dialog. And check
your connection in Communication dialog. (If your
connection is ‘NG’, then set your PORT(COM1,2,3,...)
correctly.)
(Fig. 1)
(Fig. 3)
(Fig. 3-1)

- 11 -
2) Connect RS-232C cable and turn on the power. (Use the
special Cable For Sub-program) (If your connection has
completed, you can see “Ready”)
4. POWER PCB Assy Voltage
Adjustments (Va, Vs Voltage Adjustments)
4-1. Test Equipment :D.M.M. 1EA
4-2. Adjustment Method
[P/No 3501V00220A(Sanken PSU) B/D]
(1) Va Adjustment
1) After receiving 100% Full White Pattern, HEAT RUN.
2) Connect + terminal of D.M.M to Va pin of P807, connect
- terminal to GND pin of P807.
3) After turning RV501, 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 P807, connect
– terminal to GND pin of P805.
2) After turning RV401, voltage of D.M.M adjustment as
same as Va voltage which on label of panel right/top.
(Deviation; ±0.5V)
5. EDID (The Extended Display
Identification Data)/ DDC (Display
Data Channel) download
5-1. Required Test Equipment
1) Adjusting PC with S/W for writing EDID Data.(S/W : EDID
TESTER Ver.2.5)
2) A Jig for EDID Download
3) Cable : Serial(9Pin or USB) to D-sub 15Pin cable, D-sub
15Pin cable, DVI to HDMI cable
5-2. Setting of device
5.3. Preparation for Adjustment
1) As above Fig. 5, Connect the Set, EDID Download Jig, PC
& Cable.
2) Turn on the PC & EDID Download Jig. And Execute the
S/W : EDID TESTER Ver,2.5
3) Set up S/W option
Repeat Number : 5
Device Address : A0
PageByte : 8
4) Power on the Set
5.4. Sequence of Adjustment
(1) DDC data of Analog-RGB
1) Init the data
2) Load the EDID data.(Open File)
[Analog-RGB : MF056A_RGB.ANA]
[digital(HDMI) : MF056A_DMI.DVI]
3) Set the S/W as below.
4) Push the “Write Data & Verify”button. And confirm “Yes”.
5) If the writing is finished, you will see the “OK” message.
Each PCB assembly must be checked by check JIG set.
(Because power PCB Assembly damages to PDP Module,
especially be careful)
(Fig. 4) Connection diagram of power adjustment for measuring
(Fig. 5) Connection Diagram of DDC download

- 12 -
6. Auto AV(CVBS) Color Balance
6-1. Required
- This AV color balance adjustment should be performed befor
white Balance Adjustment
6-2. Required Equipment
1) Remote controller for adjustment
2) AV Pattern Generator
: 802F Pattern Generator, Master(MSPG-925FA), etc
(Which has PAL Composite Video format output with
standard(1.0 Vpp) Vertical 100% Color Bar Pattern as Fig6)
6-3. Method of Auto Color Balance
1) Input the PAL Composite Video (Fig6. 100% Color Bar
Pattern) into video input.
(42PX4RV-TA : AV1/AV2 Input 50Hz,
42PX4RV-ZA : AV4/AV5 Input)
2) Set the PSM to Standard mode in Picture menu.
3) Press INSTAR key on R/C for adjustment.
4) Press the G(Vol. +) key operate to set, then it becomes
automatically.
5) Auto-RGB OK means completed adjustment.
7. Adjustment of White Balance
7-1. Required Equipment
1) Remote controller for adjustment
2) Color Analyzer (CA-100 or same product)
3) Auto W/B adjustment instrument(only for auto adjustment)
4) AV Pattern Generator
7-2. Connecting diagram of equipment for
measuring (For Auto Adjustment)
WAuto adjustment Map(RS-232C)
7-3. Adjustment of White Balance
OOperate the zero-calibration of the CA-100, then stick
sensor to PDP module surface when you adjust.
OFor manual adjustment, it is also possible by the following
sequence.
1) Select white pattern of heat-run mode by pressing power
on key on remote control for adjustment then operate heat
run more than 15 minutes.
2) As below Fig.7-1, Supply 216Level (85 IRE) full screen
pattern to Video input.
(42PX4RV-TA : AV1/AV2 INPUT 50Hz,
42PX4RV-ZA : AV4/AV5 INPUT)
3) Press the TV/AV KEY on R/C for converting input mode.
4) Set the PSM to Standard mode in Picture menu.
5) Enter the White Balance adjustment mode by pressing the
INSTART key twice(White Balance) on R/C.
6) 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.
7) Adjust Only High Light with R Gain/ B Gain using F / G
(VOL+/-) key on R/C.
8) Adjust it until color coordination becomes as below.
(High Light G Gain : 7A // Low Light R Offset : 7F, G Offset
7E, B Offset 80 is Fixed)
[MF-056A : 42PX4RV-TA/ZA] - VGA 42”
Bright : High Light : 80 ± 20cd
Color-Coordinate : High Light : X : 0.285 ± 0.003
Y : 0.295 ± 0.003
Color Temperature : 9,300°K ± 500°K
9) When adjustment is completed, Exit adjustment mode
using EXIT key on R/C
(Fig. 7-1) Pattern for Adjustment of White Balance
216 Level (85 IRE)
Type
Baud Rate
115200
Index
R Gain
G Gain
B Gain
R Offset
G Offset
B Offset
Data bit
8
Cmd1 Cmd2
j a
j b
j c
j d
j e
j f
Stop bit
1
Parity
NONE
MF-056A
Protocol
Setting
Data Min Value
00(00)
00(00)
00(00)
00(00)
00(00)
00(00)
Max Value
255(FF)
255(FF)
255(FF)
255(FF)
255(FF)
255(FF)
(Fig. 6) Auto AV(CVBS) Color Balance Test Pattern
(Fig. 7) Connection Diagram of Auto W/B adjustment
MSPG-2100 /
MSTG-5200
216 Level (85 IRE)
COLOR
ANALYZER
TYPE ; CA-100
CVBS
signal
input
RS-232C Serial Communication

- 13 -
8. Auto Component Color Balance
8-1. Required Test Equipment
1) Remote controller for adjustment
2) 802F Pattern Generator
(Which has 720p Ypbpr output & PC 1024x768 60Hz with
Standard(0.7Vpp) Vertical 100% Color Bar Pattern as Fig.8)
8-2. Method of Auto Component Color Balance
1) Input the Component 720p 100% Color Bar signal into
Component1 or Component2.
2) Set the PSM to Standard mode in Picture menu.
3) Press INSTART key on R/C for adjustment.
4) Press the G(Vol. +) key operate To set, then it becomes
automatically.
5) Auto-RGB OK means complete adjustment
9. Auto RGB Color Balance
9-1. Required Test Equipment
1) Remote controller for adjustment
2) 802F Pattern Generator, Master (MSPG-925FA), etc.
(Which has XGA 60Hz PC Format output with standard
(0.7Vpp) horizontal black and white pattern as Fig.10)
9-2. Method of Auto RGB Color Balance
1) Input the PC 1024x768 60Hz horizontal black and white
pattern into RGB.
2) Set the PSM to Standard mode in Picture menu.
3) Press ADJ key on R/C for adjustment.
4) Press the G(Vol. +) key operate To set, then it becomes
automatically.
5) Auto-RGB OK means completed adjustment.
9. Default Value in Adjustment mode
9-1. Auto Color Balance (Component/RGB)
9-2. White Balance
Level : 0
Level : 255
(Fig. 9) Auto RGB Color Balance Test Pattern
(Fig. 10) Default Value on OSD
(Fig. 10-1) Default Value on OSD
Auto Color Balance(HEX)
Auto-RGB GTo Set
Red Offset1 80
Green Offset1 80
Blue Offset1 80
Red Offset2 80
Green Offset2 80
Blue Offset2 80
Red Gain 80
Green Gain 80
Blue Gain 80
Reset GTo Set
White Balance(Hex)
Red Gain 80
Red Offset 80
Green Gain 80
Green Offset 80
Blue Gain 80
Blue Offset 80
Reset GTo Set
(Fig. 8) Auto Component Color Balance Test Pattern

- 14 -
TROUBLE SHOOTING GUIDE
1. Power Board
1-1. The whole flowchart which it follows in voltage output state
Start check
Manufacture enterprise
meaning of a passage
1. Check the Power Off
condition.
Doesn't the
screen whole come
out?
Is it identical
with Power Off
condition?
Yes
Yes
No
No
No
No
No
2. Check the Interface
signal condition.
Is the Interface
signal operated?
Yes
3. Check the St-by 5V
signal circuit.
Doesn't the
low pressure output
come out?
Doesn't the
St-by 5V signal
come out?
Yes
Yes
No
4. Check the 5V Monitor
signal circuit.
Doesn't the
5V Monitor signal
come out?
Yes
7. Check the VSC Vs-ON
signal
Doesn't the
high tension output
come out?
Doesn't the
VSC signal Vs-ON
come out?
Yes
Yes
Does
high tension
output voltage Drop
occur?
When the
Y B/D Module
input connector is
removed, does output
voltage drop
occur?
When the
Y, Z B/D Module
input connector is remove,
does Power Board hightension
output voltage Drop
occur?
Yes No No
9. Check the Power
Board Output high
tension circuit
Yes
10. Check the Z B/D
Module output circuit
Yes
When the
Z B/D Module
input connector is
removed, does output
voltage Drop
occurs?
11. Check the Y B/D
Module output circuit
Yes
No
8. Check the Vs, Va
voltage output circuit.
Doesn't the
Vs, Va voltage output
come out?
Yes
No
No
5. Check the VSC RL-ON
signal.
Doesn't the
VSC signal RL-ON
come out?
Yes
6. Check the VSC low
pressure output
Doesn't the
VSC low pressure
output come out?
Yes

- 15 -
1-2. Sony Power Board Structure
1 2 3
T502: Vs Trans
T702: Va Trans
T101: St-by Trans
T103: Low Voltage Trans

- 16 -
1-3. Sanken, LGIT Power Board Structure
1 2 3
T221: Vs Trans
T271: Va Trans
T121: St-by Trans
T201: Low Voltage Trans

- 17 -
2. No Power
(1) Symptom
flDoes’t minute discharge at module.
flNon does not come in into the front LED.
(2) Check following
Is plug in power cord? Plug in power cord.
Yes
No
Is the Line Filter and Power
Board Cable connected? Connect the Cable.
Yes
No
Is the Fuse(F101) on
Power Board normal? Replace the Fuse.
Yes
No
Is the Power Board and 7P of
VSC Board Cable connected? Connect the Cable.
Yes
No
After the cable connect is remved
to Power Board(except the CN101
connection cable), the AC voltage
marking is authorized on manual.
When ST-BY 5V is not operated,
replace Power Board.

- 18 -
3. Protect Mode
(1) Symptom
flAfter once shining, it does not discharge minutely
from module
flThe Rely falls(The sound is audible “click”)
flIt is converted with the color where the front LED
is red from green.
(2) Check following
Is the Power Board
normal ? Replace Power Board.
Is output the normality Low/High
voltage except Stand-by 5V?
Yes
No No
Is the each connector
normal? Replace the connector.
Replace
Y-Board.
After connecting well each connector,
the normality it operates?
Yes
No No
Is the Ctrl Board
normal? Replace X-Board.
Is the output voltage normal after
remove P1, 2, 4, 9, 10 connector of
Ctrl-B/D?
Yes
No Yes
Is the Y-Board
normal?
Is the output voltage
normal after remove
P5, P6 connector of
Y-B/D?
Is the Fuse(FS2) on Y-B/D normal?
(In case of open is replace)
Yes
No Yes Yes
Replace
Z-Board.
Is the Z-Board
normal?
Is the output voltage
normal after remove
P1 connector of Z-
B/D?
Is the Fuse (FS1, FS2) on Z-B/D
normal? (In case of open is replace)
Yes
No Yes
Is the X- Board
normal?
Is the output voltage normal after
remove P1, 2, 3, 4, 5 connector of
X-B/D?
After remove P1, P2, P3 output voltage
normality: Replace Right X-B/D
After remove P4, P5 output voltage
normality: Replace Left X-B/D
Yes
No Yes
Is the
VSC Board normal? Is the output voltage normal after remove P1001, P1100?
After crisis COF of each board, check the normality operates.
If in case normality operates, correspondence COF Fail is
replace the module.
After remove P1001, 1100 normal
operation: Replace VSC Board
Yes
No
Is the COF of X, Y, Z
normal ?
No
Yes
Yes

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4. No Raster
(1) Symptom
flDoes’t minute discharge at module.
flIt maintains the condition where the front LED is green.
(2) Check following
Is the Power Board
normal? Replace the Power Board.
Is output the normality Low/High
voltage except Stand-by 5V?
Yes
No No
Is the each connector
normal? Replace the connector.
Replace
Y-Board.
After connecting well each connector,
the normality it operates?
Yes
No No
Is the
Ctrl Board normal? Replace X-Board.
Is the output voltage normal after
remove P1, 2, 4, 9, 10 connector of
Ctrl-B/D?
Yes
No Yes
Is the Y-Board
normal?
Is the output voltage
normal after remove
P5, P6 connector of
Y-B/D?
Is the Fuse(FS2) normal on Y-B/D?
(In case of open is replace)
Yes
No Yes Yes
Replace
Z-Board.
Is the
Z- Board normal?
Is normal the output
voltage after remove
P1 connector of
Z-B/D?
Is the Fuse(FS1, FS2) normal on
Z-B/D? (In case of open is replace)
Yes
No Yes
Is the
X- Board normal?
Is the output voltage normal after
remove P1, 2, 3, 4, 5 connector of
X-B/D?
After remove P1, P2, P3 output voltage
normality: Replace Right X-B/D
After remove P4, P5 output voltage
normality: Replace the Left X-B/D
Yes
No Yes
Is the
VSC Board normal? Is the output voltage normal after remove P1001, P1100?
After crisis COF of each board, check the normality operates.
If in case normality operates, correspondence COF Fail is
replace the module.
After remove P1001, P1100 normal
operation: Replace the VSC Board
Yes
No
Is the COF of X, Y, Z
normal?
No
Yes
Yes

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5. In case of occurring strange screen into specific mode
5-1. In case the OSD does not displayed
(1) Symptom
flLED is green
flThe minute discharged continuously becomes
accomplished from module
(2) Check following
Is the LVDS cable
normal ?
Is the VSC Board
normal?
Is the LVDS cable
connected well?
Cable inserts well.
Yes
No
No
Yes
Does the FIL8532 IC
(IC800) Operates ?
Replace FIL8532
IC(IC800).
No
Is the Ctrl Board of
Module normal? Replace Ctrl B/D.
No
No
Yes Replace VSC B/D
Replace the cable.
Yes