LG 42PX4DV User manual

PLASMA TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : DF-054A
MODEL : 42PX4DV
42PX4DV-EA
website:http://biz.LGservice.com
e-mail:http://www.LGEservice.com/techsup.html
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CONTENTS
SAFETY PRECAUTIONS ....................................................................................3
DESCRIPTION OF CONTROLS..........................................................................4
SPECIFICATIONS................................................................................................8
ADJUSTMENT INSTRUCTIONS .......................................................................10
TROUBLE SHOOTING GUIDE..........................................................................15
PRINTED CIRCUIT DIAGRAM ..........................................................................24
BLOCK DIAGRAM.............................................................................................28
EXPLODED VIEW..............................................................................................30
EXPLODED VIEW PARTS LIST ........................................................................31
REPLACEMENT PARTS LIST...........................................................................32
SCHEMATIC DIAGRAM.........................................................................................
PRINTED CIRCUIT BOARD ..................................................................................
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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
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D/A TV INPUT
TV
DVD
VCR
PIP PR-
PIP
PIP PR+
SWAP
PIP INPUT
PSM
SSM
SLEEP
GUIDE
SUBTITLE/
MENU
TEXT
MUTE
LIST
SIZE POSITION INDEX HOLD
TIME REVEAL MIX I/II
Q.VIEW
FAV
OK
VOL PR
POWER
ARC
?
EXIT
INFO i /
INPUT
Selects the TV, AV, 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.
POWER
switches the set on from standby or off to
standby.
ARC
Changes the picture format.
SLEEP
Sets the sleep timer.
SSM
To select the sound appropriate to your
viewing programme.
EXIT
Clears all on-screen displays and returns to
TV viewing from any menu.
TEXT
These buttons are used for teletext.
For further details, see the ‘Teletext’ section.
COLOURED BUTTONS : These buttons are
used for teletext (only TELETEXT models) or
programme edit.
INFO/ i /* (option)
displays information on top of the screen
whilst watching the TV.
(In Digital mode only)
FAV
selects a favourite programme.
I/II
Selects the language during dual language
broadcast.
Selects the sound output.
Q.VIEW
Returns to the previously viewed programme.
VOL DD/ EE(Volume Up/Down)
Increases/decreases sound level.
PR DD/ EE(Programme Up/Down)
Selects a programme.
SUBTITLE /*
switches the subtitle on or off in Digital mode.
D/A TV
selects analogue or digital mode.
MODE
Selects another device.
GUIDE
shows a programme schedule.
(In Digital mode only)
MENU
Displays on screen menus one by one.
Exits the current menu.
Memorizes menu changes.
PSM
Adjusts the factory preset picture according
to the room.
MUTE
Switches the sound on or off.
NUMBER buttons
LIST
Displays the programme table.
(In Analogue mode only)
VCR/DVD BUTTONS
Controls a LG video cassette recorder.
controls a LG DVD player.
OK
accepts your selection or displays the
current mode.
DD/ EEor FF/ GG
Adjusts menu settings.
Selects menu item.
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DESCRIPTION OF CONTROLS
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- 5 -
<Front Panel Controls>
1. Power Button
Switches the set on from standby or off to standby.
2. Remote Control Sensor
3. TV/AV 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
8. Intelligent Eye
Adjusts picture according to the surrounding conditions.
PR
VOL
MENUTV/AV OK
21 3 4 5 6
7
8
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S-VIDEO
AAV5V5
AC INPUT
VIDEO AUDIO R
L/MONO
1. PCMCIA (Personal Computer Memory Card
International Association) Card Slot
2. ANTENNA INPUT/OUTPUT
3. HDMI(DVI VIDEO) / AUDIO INPUT / RGB INPUT
Connect the monitor output socket of the PERSONAL
COMPUTER 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.
4. REMOTE CONTROL
5. VARIABLE AUDIO OUT SOCKETS
6. RS-232C INPUT (CONTROL/SERVICE) PORT
Connect to the RS-232C port on a PC.
7. AUDIO/VIDEO IN SOCKETS (AV4)
Connect the audio/video 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
sockets as in AV4.
8. COMPONENT INPUT
Connect DVD video outputs to Y, PB, PRof COMPONENT
INPUT and audio outputs to Audio sockets of AUDIO
INPUT.
9. EURO SCART SOCKET
Connect the euro scart socket of the VCR to these sockets.
Note:
a. If you want to use the EURO scart cable, you have to
use the signal shielded Euro scart cable.
b. If the S-VIDEO(Y/C) signal is received through the Euro
scart socket 2 (AV2), you must change to the SAV2 mode.
10. POWER CORD SOCKET
This set operates on AC power. The voltage is indicated on
the Specifications page. Never attempt to operate the
Monitor on DC power.
11. AUDIO/VIDEO IN SOCKETS (AV5)
S-VIDEO/AUDIO IN SOCKETS
2
11
1 3 4 5 6 7 8 9 10
<Back Panel>
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AS mark
LG TV
Owner’s Manual
1.5V
1.5V
Alkaline batteries Power Cord
D/ATV INPUT
TV
DVD
VCR
SLEEP
GUIDE
INFO
MENU
TEXT
MUTE
LIST
SIZE UPDATE INDEX STILL
TIME REVEAL MIX I/II
PIPPR- PIPPR+ SWAP
PIP PSM SSM
PIPINPUT
Q.VIEW
FAV
OK
VOL PR
EXIT
POWER
ARC
?
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 the purchasing of these items.
Optional Extras
Accessories
Tilt wall mounting bracket Video cables Audio cables
Ceiling mounting bracket
40
42
50
42
40
-Secure the set assembly by fixing it to a wall by using the Eye Bolts/Wall brackets.
Joining the set assembly to the wall to prevent the set tumbling
•If the set is to be mounted on a desk top, insert the 2 Eye-Bolts and tighten them
securely in the upper holes as shown.
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 Eye-Bolts and the brackets are tightened securely.
• Secure the set assembly to the wall with strong strings or wound wire cables,
(not supplied with the product), as shown.
2-Wall brackets
2-Eye Bolts
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SPECIFICATIONS
NOTE : Specifications and others are subject to change without notice for improvement .
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VApplication Range
This spec is applied to the 42” PDP TV used DF-054A 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 : IEC/EN60065
EMI : En55013
EMS : En55020
VGeneral Specification
1) Module Specification (42” VGA Module)
Display Screen Device
Aspect Ratio
PDP Module
Operating Environment
Storage Environment
Input Voltage
1
2
3
4
5
6
No Item Specification Remark
42 inch wide Color Display Module
16:9
PDP42V7xxxx,
RGB Closed Type, Film Filter
1)Temp. : 0~40deg
2)Humidity : 0~85%
3)Temp. : -20~60deg
4)Humidity : 0~85%
100-240V~, 50/60Hz
PDP
Maker : Sony/ LG Innotek/ Sanken
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2) Model General Specification
Market
Broadcasting system
Receiving system
Scart Jack (3EA)
Video (2EA)
S-Video Input (2EA)
Component Input (1EA)
RGB Input
HDMI Input
Audio Input (4EA)
Wired Control
1
2
3
4
5
6
7
8
9
10
11
No Item Specification Remark
The United Kingdom
1) PAL-BG
2) PAL-DK
3) PAL-I,I’
4)DVB-T(ID TV)
Analog : Upper Heterodyne
Digital : COFDM
PAL, SECAM
PAL, SECAM, NTSC
PAL, SECAM, NTSC
Y/Cb/Cr, Y/Pb/Pr
RGB-PC,
RGB-DTV
HDMI-PC
HDMI-DTV & SOUND
PC Audio, Component, AV (2EA)
Discrete IR
UK
4 System : PAL, SECAM, NTSC, PAL60
4 System : PAL, SECAM, NTSC, PAL60
L/R Input
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ADJUSTMENT INSTRUCTIONS
1. Application Object
These instructions is applied all of the 42” PDP TV, DF-054A
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].
File name : H2_CH_Memory_RZ.nvm
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.
(Fig. 1)
(Fig. 2)
(Fig. 3)
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4.Sub Program Down Load
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 RS232 cable and turn on the power. (Use the
special Cable for Sub-program)
(If your connection has completed, you can see ‘Ready’)
3) Select proper ‘Model’ for each model.
4) Select ‘flash file’ for each model.
5) Click the [Download] button.
It means the completion of the ROM download if all items
show ‘OK’ and Status is changed by ‘PASS’ at the lower
right corner of the window.
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.5
5-2. 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 P807.
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)
6. EDID (The Extended Display
Identification Data)/ DDC (Display
Data Channel) download
6-1. 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
6-2. Setting of device
6.3. 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
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Each PCB assembly must be checked by check JIG set.
(Because power PCB Assembly damages to PDP Module,
especially be careful)
(Fig. 5) Connection diagram of power adjustment for measuring
(Fig. 6) Connection Diagram of DDC download
(Fig. 4)
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6.4. Sequence of Adjustment
(1) DDC data of Analog-RGB
1) Init the data
2) Load the EDID data.(Open File)
[Analog(RGB) : H2_VGA_XGA_RGB(2B52.ANA]
[Digital(HDMI) : H2_VGA_HDMI(CB50).DVI] (VGa only)
[Digital(HDMI) : H2_VGA_HDMI(0F0F).DVI] (XGA only)
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.
7. Auto AV(CVBS) Color Balance
7-1. Requirement
VThis AV color balance adjustment should be performed
befor white Balance Adjustment
VIt is very import to use adjustment pattern like Fig.7
1) Within the pattern, color sequence should be aligned
: W-Y-C-G-M-R-BLUE-BLACK
(If color seqence is reversed (Black -> ... -> White),
reverse the pattern with REV key, when using Master
patern generator like MSPG-925)
2) If minimum Black level and/or maximum White level is
not correct, select 100% color bar pattern.
7-2. 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 Fig7)
7-3. Method of Auto AV(CVBS) Color Balance
1) Input the PAL Composite Video (Fig6. 100% Color Bar
Pattern) into video input.
(RCA : AV1, SCART : AV3 Input, PAL : 50Hz, NTSC : 60Hz)
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.
8. Adjustment of White Balance
8-1. 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
8-2. Connecting diagram of equipment for
measuring (For Auto Adjustment)
WAuto adjustment Map(RS-232C)
(Fig. 7) Auto AV(CVBS) Color Balance Test Pattern
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
DF-054A : 42PX4DV
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. 8) 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
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- 13 -
8-3. Adjustment of White Balance
(For Manual adjustment)
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.9, Supply 216Level (85 IRE) full screen
pattern to Video input.
(Input 50Hz, 42PXDV/42PX4DVA : 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.
(Initially, R/G/B gain and R/G/B offset values are fixed
Red Gain : 82, Green Gain : 80, Blue Gain : 86
Red Offset : 7D, Green Offset : 7E, Blue Offset : 80)
[DF-054A/C]-VGA 42”
Bright : High Light : 80 ± 20cd/m2
Color-Coordinate : High Light : X : 0.287 ± 0.003
Y : 0.291 ± 0.003
Color Temperature : 9,300°K ± 500°K
9) When adjustment is completed, Exit adjustment mode using
EXIT key on R/C
9. Auto Component Color Balance
9-1. Requirement
- It is very import to use correct adjustment pattern like fig.9
VWithin the pattern, color sequence should be aligned
: W-Y-C-G-M-R-BLUE-BLACK
(If color sequence is reversed(Black -> ... > White), reverse
the pattern with REV key, when using Master pattern
generator like MSPG-925)
VIf Minimum Black Level and/or Maximum White Level is not
correct, select 100% Color Bar Pattern.
9-2. Required Test Equipment
1) Remote controller for adjustment
2) 802F Pattern Generator
(Which has 720p Ypbpr output with Standard(0.7Vpp)
Vertical 100% Color Bar Pattern as Fig.10)
9-3. Method of Auto Component Co lor 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
10. Auto RGB Color Balance
10-1. Requirement
- It is very import to use correct adjustment pattern like fig.9
VWithin the pattern, color sequence should be aligned
: W-Y-C-G-M-R-BLUE-BLACK
(If color sequence is reversed(Black -> ... > White), reverse
the pattern with REV key, when using Master pattern
generator like MSPG-925)
VIf Minimum Black Level and/or Maximum White Level is not
correct, Do select 100% Color Bar Pattern.
10-2. 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) 100% Color Bar Pattern as Fig.11)
10-3. Method of Auto RGB Color Balance
1) Input the PC 1024x768 60Hz 100%Color bar 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.
(Fig. 10) Auto Component Color Balance Test Pattern
(Fig. 9) Pattern for Adjjustment of White Balance
216 Level (85 IRE)
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- 14 -
10. Default value in adjustment mode
10-1. Auto Color Balance (Component/RGB)
10-2. White Balance
(Fig. 13) Default Value on OSD
(Fig. 12) Default Value on OSD
Auto Color Balance(HEX)
Auto-RGB GTo Set
Source Cortez
Red Offset1 22
Green Offset1 24
Blue Offset1 23
Red Offset2 45
Green Offset2 43
Blue Offset2 37
Red Gain 014
Green Gain 031
Blue Gain 011
Reset GTo Set
White Balance(Hex)
Red Gain 82
Red Offset 80
Green Gain 86
Green Offset 7D
Blue Gain 7E
Blue Offset 80
Reset GTo Set
(Fig. 11) Auto RGB Color Balance Test Pattern
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- 15 -
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
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- 16 -
1-2. Sony Power Board Structure
1 2 3
T502: Vs Trans
T702: Va Trans
T101: St-by Trans
T103: Low Voltage Trans
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- 17 -
1-3. Sanken, LGIT Power Board Structure
1 2 3
T221: Vs Trans
T271: Va Trans
T121: St-by Trans
T201: Low Voltage Trans
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2. No Power
(1) Symptom
¯It is not discharged minutely from the module.
¯Light does not come in into the front LED.
(2) Check following
- 18 -
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.
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- 19 -
3. Protect Mode
(1) Symptom
¯After once shining, it does not discharge minutely
from module
¯The Rely falls(The sound is audible “click”)
¯It 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
All manuals and user guides at all-guides.com

- 20 -
4. No Raster
(1) Symptom
¯It does not discharged from the module.
¯It maintains the condition where the front LED is 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 after remove
P1, 2, 4, 9, 10 connectorof Ctrl-B/D
normal?
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 after remove
P1, 2, 3, 4, 5 connector ofX-B/D
normal?
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, P1100 normal
operation: Replace VSC Board
Yes
No
Is the COF of X, Y, Z
normal?
No
Yes
Yes
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