LG 50PF95 User manual

PLASMA TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : PD75A
MODEL : 50PF95 50PF95-ZA
website:htt ://biz.LGservice.com
Internal Use Only

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Only or training and service purposes
CONTENTS
CONTENTS .............................................................................................. 2
SAFETY PRECAUTIONS ..........................................................................3
SPECIFICATION ........................................................................................4
ADJUSTMENT INSTRUCTION .................................................................7
TROUBLE SHOOTING ............................................................................11
BLOCK DIAGRAM...................................................................................20
EXPLODED VIE .................................................................................. 22
EXPLODED VIE PARTS LIST............................................................. 23
REPLACEMENT PARTS LIST ............................................................... 24
SVC. SHEET ...............................................................................................
PRINTED CIRCUIT DIAGRAM ....................................................................

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Only or training and service purposes
SAFETY PRECAUTIONS
Many electrical and mechanical parts in this chassis have special sa ety-related characteristics. These parts are identi ied by in the
Schematic Diagram and Replacement Parts List.
It is essential that these special sa ety parts should be replaced with the same components as recommended in this manual to prevent
X-RADIATION, Shock, Fire, or other Hazards.
Do not modi y the original design without permission o manu acturer.
General Guidance
An isolation Transformer should always be used during the
servicing o a receiver whose chassis is not isolated rom the AC
power line. Use a trans ormer o adequate power rating as this
protects the technician rom accidents resulting in personal injury
rom electrical shocks.
It will also protect the receiver and it's components rom being
damaged by accidental shorts o the circuitry that may be
inadvertently introduced during the service operation.
I any use (or Fusible Resistor) in this monitor is blown, replace it
with the speci ied.
When replacing a high wattage resistor (Oxide Metal Film Resistor,
over 1W), keep the resistor 10mm away rom PCB.
Keep wires away rom high voltage or high temperature parts.
Due to high vacuum and large sur ace area o picture tube,
extreme care should be used in handling the Picture Tube.
Do not li t the Picture tube by it's Neck.
Leakage Current Cold Check(Antenna Cold Check)
With the instrument AC plug removed rom AC source, connect an
electrical jumper across the two AC plug prongs. Place the AC
switch in the on position, connect one lead o 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.
I 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 in inite.
An other abnormality exists that must be corrected be ore 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 or 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 o the limits speci ied, there is
possibility o shock hazard and the set must be checked and
repaired be ore 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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Only or training and service purposes
SPECIFICATIONS
NOTE : Speci ications and others are subject to change without notice or improvement .
VApplication Range
This spec is applied to the 50” PLASMA TV used PD75A 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 o each product is marked by models.
4) Speci ication and per ormance o each parts are ollowed each drawing and speci ication by part number in accordance with SBOM.
5) The receiver must be operated or about 20 minutes prior to the adjustment.
VTest Method
1) Per ormance : LGE TV test method ollowed.
2) Demanded other speci ication
Sa ety : CE, IEC speci ication
EMC : CE, IEC
VGeneral Specification ( 60” FHD Module)
Display Screen Device
Aspect Ratio
PDP Module
Operating Environment
Storage Environment
Input Voltage
1
2
3
4
5
6
No Item Speci ication Remark
50” Wide Color Display Module
16:9
PDP50H1,
RGB Closed Type, Glass Filter
1)Temp. : 0~60deg
2)Humidity : 20~80%
3)Temp. : -10~60deg
4)Humidity : 10~90%
100-240V~, 50/60Hz
Plasma Display Panel
LGE SPEC.
Maker : LG
Chassis
PD75A 50PF95
UK, German, Italy, France, Sweden, Finland, Spain,
Netherlands, Belgium, Luxemburg, Greece, Denmark,
Czech, Austria, Poland, Portugal, Norway, Rumania,
Hungary , Bulgaria, Croatia, Serbia, Swiss, Slovenia, Russia
LG
Model Name Market Brand Remark
50PF95
Sa ety : IEC/EN60065
EMI : EN55013
EMS : EN55020
UK, German, Italy, France, Sweden, Finland,
Spain, Netherlands, Belgium, Luxemburg,
Greece, Denmark, Czech, Austria, Poland,
Portugal, Norway, Rumania, Hungary , Bulgaria,
Croatia, Serbia, Swiss, Slovenia, Russia
Model ApplianceMarket
TEST
Remark

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VModule Specification
Market
Broadcasting system
Receiving system
Scart Jack (2EA)
Video Input (1EA)
S-Video Input (1EA)
Component Input (1EA)
RGB Input(1EA)
HDMI Input(2EA)
Audio Input (3EA)
1
2
3
4
5
6
7
8
9
10
No Item Speci ication Remark
UK, German, Italy, France, Sweden, Finland, Spain,
Netherlands, Belgium, Luxemburg, Greece,
Denmark, Czech, Austria, Poland, Portugal, Norway,
Rumania, Hungary , Bulgaria, Croatia, Serbia, Swiss,
Slovenia, Russia
1) PAL-BG/I / I’/ DK
2) SECAM-L/L’
3) DVB-T
Analog : Upper Heterodyne
Digital : COFDM
PAL, SECAM
PAL, SECAM, NTSC
PAL, SECAM, NTSC
Y/Cb/Cr, Y/Pb/Pr
RGB-PC
HDMI-DTV & SOUND
PC Audio, Component, AV
Analog Only
Scart 2 Jack : MNT / DTV output
4 System : PAL, SECAM, NTSC, PAL60
4 System : PAL, SECAM, NTSC, PAL60
L/R Input

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VFHD Module ( Glass Filter, 60Hz- This data at 50Hz is about 80% level of 60Hz data )
White peak brightness
White average brightness
Brightness uni ormity
Color Coordinate White X
Y
Color coordinate uni ormity
Contrast ratio at dark room 60Hz
Color Temperature Cool
Medium
Warm
Color pull in Range PAL
NTSC
Color killer Sensitivity
240
45
-15
0.261
0.268
-0.02
2000 :1
10000
8300
5500
-500
-500
-80
350
55
0
0.276
0.283
Average
3000 :1
11000
9300
6500
-
-
+15
0.291
0.298
+0.02
12000
10300
7500
+500
+500
1
2
3
4
5
6
7
8
9
No Item Remark
(*) Peak Brightness Mode
- 1/100 white window pattern
(Typically 1% window size)
- 100 IRE (255 Gray)
- Picture : Dynamic (cool)
- Input : HDMI-PC (1920x1080 60Hz)
* Peak Brightness Condition may
Slightly di erent between Sets.
- Full White Pattern
- 100 IRE (255 Gray)
- Picture : Dynamic (cool)
- Full White Pattern
- 85 IRE (216 Gray)
- Picture : Dynamic (cool)
- Full White Pattern
- 85 IRE (216 Gray)
- Picture : Dynamic (cool)
- 85IRE Full White Pattern
- Picture : Dynamic (cool)
- 1/100 white window pattern
- 100 IRE (255 Gray)
- Picture : Dynamic (cool)
- Input : HDMI-PC (1920x1080 60Hz)
- Full White Pattern
- 85 IRE (216 Gray)
- Picture : Dynamic (cool)
cd/m2
cd/m2
%
Hz
Hz
dBm
Min Typ Max Unit

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ADJUSTMENT INSTRUCTION
1. Application Object
These instructions are applied all o the 50” PLASMA TV,
PD75A Chassis.
2. Note
(1) Because this is not a hot chassis, it is not necessary to use
an isolation trans ormer. However, the use o isolation
trans ormer will help protect test instrument.
(2) Adjustment must be done in the correct order.
(3) The adjustment must be per ormed in the circumstance o
25±5°C o temperature and 65±10% o relative humidity i
there is no speci ic designation.
(4) The input voltage o the receiver must keep 100-240V~,
50/60Hz.
(5) Be ore adjustment, execute Heat Run or 15 minutes.
OA ter 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 or adjustment.
2) OSD display and screen display PATTERN MODE.
* Set is activated HEAT-RUN without signal generator in
this mode.
* Single color pattern(RED/BLUE/GREEN) o HEAT-RUN
mode uses to check PANEL.
3. Adjustment items
3-1. PCB assembly adjustment items
(1) Channel memory.
- Recovery the channel memory by adjust R/C.
3-2. SET assembly adjustment items
(1) Adjustment o POWER PCB assembly voltage.
(2) DDC Data input.
(3) Auto AV(CVBS) Color Balance.
(4) Auto Component Color Balance adjust.
- standard equipment : 802F Pattern Generator. Master
Pattern Generator(MSPG-925, etc) or same product.
(5) Auto RGB Color Balance adjustment
- standard equipment : PC Pattern Generator(VG828,
VG854, 801GF, MSP3240A) or same product.
(6) Factoring Option Data input.
4. Channel memory Setting Method
: You can set channel memory by R/C or adjustment.
1) Press ADJ key on R/C or adjustment.
2) Press ENTER key on “System Control3”.
3) Press VOL + key on “Channel Recover”.
5. PCMCIA CARD Checking Method
: You must adjust DTV 29 Channel and insert PCMCIA CARD
to socket.
1) I PCMCIA CARD works normally, normal signals display
on screen. But it works abnormally, “No CA module” words
display on screen.
6. PO ER PCB Assy Voltage
Adjustments (Va, Vs Voltage adjustments)
6-1. Test Equipment : D.M.M. 1EA
6-2.Connection Diagram for Measuring
: re er to Fig.1
6-3. Adjustment Method
(1) Va Adjustment
1) A ter receiving 100% Full White Pattern, HEAT RUN.
2) Connect + terminal o D.M.M to Va pin o P812, connect
- terminal to GND pin o P812.
3) A ter turning RV951, voltage o D.M.M adjustment as
same as Va voltage which on label o panel right/top.
(Deviation; ±0.5V)
(2) Vs Adjustment
1) Connect + terminal o D.M.M to Vs pin o P812, connect
– terminal to GND pin o P812.
2) A ter turning RV901, voltage o D.M.M adjustment as
same as Va voltage which on label o panel right/top.
(Deviation; ±0.5V)
I you turn on a still screen more than 20 minutes (Especially
Digital pattern, Cross Hatch Pattern), an a terimage may occur
in the black level part o the screen.
Each PCB assembly must be checked by check JIG set.
(Because power PCB Assembly damages to PDP Module,
especially be care ul)
Vs Adj
(V951)
Va Adj
(V901)
P812
(Fig.1) Connection diagram o power adjustment or measuring
<50” FHD : EAY38800401/0801>

7. EDID
7-1. EDID Data
7-2. Data
(1) ANALOG(128Byte).
(2) HDMI1(256Byte).
=> 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) Monthly: '09' => '09'
Year : '2006' => '10'
4. [4]-Model Name : model name.
5. [5]-Checksum (7EH) -> Changeable by total EDID data.
8. ADC Calibration
9. Adjustment of AV Color Balance
9-1. Required Equipment
(1) Remote controller or adjustment.
(2) MSPG-925FS Pattern Generator. (Which has Video
Signal: 7 Color Bar Pattern shown in Fig.2)
-> Model: 202 / Pattern: 65
- Case 1) EC and FC model use PAL-BGDHI
(composite signal)
9-2. Method of Auto RF/ AV/ S-Video Color
Balance (PAL_BGDHI)
(1) Input the Video Signal: 7 Color Bar signal into AV3.
(2) Set the PSM to Dynamic mode in the Picture menu.
(3) Press IN-START key on R/C or adjustment.
(4) Press the G(Vol. +) key to operate the set, then it
becomes automatically.
(5) A ter downloading complete, the ‘OK’ word appears.
(6) Auto-RGB OK means the adjustment is completed.
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Item
Manu acturer ID
Version
Revision
Condition
GSM
Digital : 1
Digital : 3
Hex Data
1E6D
01
03
For RGB EDID
D-sub to D-sub
For HDMI EDID
DVI-D to HDMI or HDMI to HDMI
12
3
45
12
3
45
5
* Use the proper signal cable or EDID Download.
- Analog EDID : Pin3 exists.
- Digital EDID : Pin3 exists.
*
Never connect HDMI & DVI-D & DVI-A Cable at the same time.
* Use the proper cables below or EDID Writing.
50PF95
Product ID
Product IDModel Name EDID table
73C3
74C3
Hex
C373
C374
Dec
50035
50036
Analog
Digital
50PF95 00000FC003530504639350A202020202020
Model Name Model Name(Hex)
MSPG925FS
Component RGB-PCAVADC
Model : 3
(1024*768 60Hz)
Pattern : 65
Model:215(720P)
Pattern : 65
* 720P/50Hz
7 Color Bar
PAL
INPUT SELECT AV3
Model : 202
(PAL-BGDHI)
Pattern : 65
* PAL 7 Color Bar
- System control RS-232 Host should be “PC“ or adjustment.
(Fig.2)

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10. Adjustment of Component
10-1. Required Equipment
(1) Remote controller or adjustment.
(2) MSPG-925FS Pattern Generator. (Which has 720p/50Hz
YPbPr output Pattern shown in Fig.3)
-> Model : 215 / Pattern : 65
10-2. Method of Auto Component Color Balance
(1) Input the Component 720p/50Hz 7 Color Bar(MSPG-
925FS model:215, pattern:65) signal into Component.
(2) Set the PSM to Dynamic mode in the Picture menu.
(3) Press IN-START key on R/C or adjustment.
(4) Press the G(Vol. +) key to operate the set, then it becomes
automatically.
(5) A ter downloading complete, the ‘OK’ word appears.
(6) Auto-RGB OK means the adjustment is completed.
11. Adjustment of RGB
11-1. Required Equipment
(1) Remote controller or adjustment.
(2) MSPG-925FS Pattern Generator ( Which has XGA
[1024*768] 60Hz 1/2 black & white pattern shown in Fig.4 )
11-2. Method of Auto RGB Color Balance
(1) Input the PC 1024x768 @ 60Hz 1/2 black & white pattern
(MSPG-925FS, Model:3, Pattern:65) into RGB.
(using D-sub to D-sub cable)
(2) Set the PSM to Dynamic mode in the Picture menu.
(3) Press IN-START key on R/C or adjustment.
(4) Press the G(Vol. +) key to operate the set, then it becomes
automatically.
(5) A ter downloading complete, the ‘OK’ word appears.
(6) Auto-RGB OK means the adjustment is completed.
12. Adjustment of hite Balance
12-1. Required Equipment
(1) Color Analyzer.(CS-100, CA-100+(CH 10), CA-210(CH 10))
* Please adjust CA-210, CA-100+ by CS-1000 before
measuring.
W Color temperature standards according to CSM and Module.
W White balance adjustment coordinate and color temperature.
* PC( or communication through RS-232C)
-> UART Baud rate : 115200 bps
12-2. Connection Picture of the Measuring
Instrument(On Automatic control)
(1) Inside PATTERN is used when W/B is controlled. Connect
to auto controller or push control R/C IN-START -> Enter
the mode o White-Balance, the pattern will come out.
12-3. Auto-control interface and directions
(1) Adjust in the place where the in lux o light like loodlight
around is blocked.(illumination is less than 10ux)
(2) Measure and adjust a ter sticking the Color Analyzer(CA-
100+, CA210) to the side o the module.
(3) Aging time : keep white pattern using inside pattern.
(Fig.3)
(Fig.4)
(Fig.5) Auto AV(CVBS) Color Balance Test Pattern
Full White Pattern
RS-232C Communication
CA-210
Color
ANALYZER
TYPE : CA-210
PLASMA Remark
11000K
9300K
6500K
Cool
Normal
Warm
CSM
CS-1000 CA-100(CH 10) CA-210(CH 10)
0.276 ± 0.002
0.283 ± 0.002
0.000
0.276 ± 0.002
0.283 ± 0.002
0.000
0.276
0.283
0.000
x
y
uv
Cool
CS-1000 CA-100(CH 10) CA-210(CH 10)
0.285 ± 0.002
0.293 ± 0.002
0.000
0.285 ± 0.002
0.293 ± 0.002
0.000
0.285
0.293
0.000
x
y
uv
Medium
CS-1000 CA-100(CH 10) CA-210(CH 10)
0.313 ± 0.002
0.329 ± 0.002
0.003
0.313 ± 0.002
0.329 ± 0.002
0.003
0.313
0.329
0.003
x
y
uv
Warm

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V Auto adjustment Map(RS-232C)
V Auto adjustment Map(RS-232C)
- Baud : 115200bps, RS232 Host : PC, Echo : none
13. Adjustment of hite Balance
(Manual white Balance)
V One o R Gain/ G Gain/ B Gain should be kept on 80, and
others are controlled lowering rom 80
(1) Press ‘power on’ o the control R/C, set heat run to white
by pressing and heat run over 15 minutes.(Set: RS-232
Host: PC, Baud Rate: 115200bps, Download: Cortez)
(2) Zero Calibrate CA-100+, and stick the sensor to the center
o PDP module sur ace when you adjust.
(3) Double click In-start key on Controlling R/C and get in
‘white balance’.
(4) Set test-pattern on and display inside pattern. Control is
carried out on three color temperature, COOL, MEDIUM,
WARM. (Control is carried out three times.)
(5) When the R/G/B GAIN is 80 on OSD, it is the FULL
DYNAMIC Range o the Module. In order to control white
balance without the saturation o FULL DYNAMIC Range
and DATA, one o R Gain / G Gain / B Gain should be kept
on 80, and other two is controlled lowering rom 80.
* Color Temperature: Cool, Medium, Warm
(1) When R GAIN is set to 80
- Control G GAIN and B GAIN by lowering rom 80.
(2) When B GAIN is set to 80
- Control R GAIN and G GAIN by lowering rom 80.
(3) When G GAIN is set to 80
- Control R GAIN and B GAIN by lowering rom 192.
One o R Gain / G Gain / B Gain should be kept on 80, and
adjust other two lower than 80.
(When R/G/B GAIN are all 80, it is the FULL DYNAMIC
Range o Module)
14. Input the Shipping Option Data
1) Push the IN-START key in a Adjust Remocon.
2) Input the Option Number that was speci ied in the BOM, into
the Shipping area.
3) The work is inished, Push VKey.
15. Set Information(Serial No& Model name)
15-1. Setting up ‘Tool OPTION1,2’
(After setting white balance, this is set)
(1) Press ADJ Key in the R/C or adjustment
(2) Insert Option value by a number key
(3) Press the Enter Button
15-2. Check the serial number & Model Name
(1) Push the menu button in DTV mode.
- Select the SETUP-> Diagnostics -> To set.
(2) Check the Serial Number.
16. Set factoring condition
(1) This Adjustment is setting actory shipment mode.
(2) Push the IN-STOP key o adjustment remote controller
be ore the actory shipment.
Model
Name
50PF95
Tool
Option1
26950 1977 0 14 2 1 192
Tool
Option2
Area
Option
Option1 Option2 Option3 Option4
ADC adjust
Data Read
De ault Write
Enter
Adjust Mode
ADC adjust
ADC Parameter
Digital Data
ADC Parameter
(Average)
Adjustment
Con irmation
Adjust ‘Mode In’
Adjust ‘Mode O ’
NO Item Remark CMD1 CMD2 Data 0
A
A
A
A
A
A
A
D
D
D
D
D
D
D
0
0
0
0
0
0
0
1
2
3
4
9
0
9
Trans er 18Byte
(Input resolution Data)
To check ADC Adjusment
on Assembly line
When transger the ‘Mode
In’, Carry the command.
- Caution : Using ‘power on’ button’ o the control R/C, power in TV.
Type
Baud Rate
115200
Index
R Gain
G Gain
B Gain
R O set
G O set
B O set
Data bit
8
Cmd1 Cmd2
ja
jb
jc
jd
je
j
Stop bit
1
Parity
NONE
PD75A/C
Protocol
Setting
Data Min Value
00(00)
00(00)
00(00)
00(00)
00(00)
00(00)
Max Value
128(80)
128(80)
128(80)
128(80)
128(80)
128(80)