LG 50PT85-ZB (CHASSIS:PD74A) Service Manual ▷ View online
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V
Module Specification
Market
Broadcasting system
Receiving system
SCART Jack(2EA)
Video Input (2EA)
S-Video Input (1EA)
Component Input (1EA)
RGB Input
HDMI Input(2EA)
Audio Input(4EA)
1
2
3
4
5
6
7
8
9
10
No
Item
Specification
Remark
UK,France, Germany, Spain,
Sweden, Finland, Italy
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)
UK,France, Germany, Spain,
Sweden, Finland, Italy
Scart 1 Jack is Full scart and support RF-OUT
(analog)
Scart 2 Jack is Half scart and support MNT-OUT
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 are applied to all of the 50” PLASMA TV,
PD74A Chassis.
PD74A 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.
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
(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.
there is no specific designation.
(4) The input voltage of the receiver must keep 100-240V~,
50/60Hz.
(5) Before adjustment, execute Heat-Run for 30 minutes at RF
no signal.
3. Channel memory Setting Method
: You can set channel memory by R/C for adjustment.
1) Press ADJ key of Adjust Remote Controller.(P/N:105-210M)
2) Select ‘Channel Recover’ by using
2) Select ‘Channel Recover’ by using
D
/
E
(CH +/-) key, and
press ‘VOL +’.
3) The set is turned off automatically.
4) Press ‘power’ key of Adjust Remote Controller.
4) Press ‘power’ key of Adjust Remote Controller.
4. PCMCIA CARD Checking Method
: You must adjust DTV ##(Scrambled) Channel and insert
PCMCIA CARD to socket.
1) If PCMCIA CARD works normally, normal signals display
on screen.
But it works abnormally, “No CA module” words display on
screen.
But it works abnormally, “No CA module” words display on
screen.
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.1
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 P805, connect
2) Connect + terminal of D.M.M to Va pin of P805, connect
- terminal to GND pin of P805.
3) After turning VR901, voltage of D.M.M adjustment as
same as Va voltage which on label of panel right/top.
(Deviation; ±0.5V)
(Deviation; ±0.5V)
(2) Vs Adjustment
1) Connect + terminal of D.M.M to Vs pin of P805, connect
– terminal to GND pin of P805.
2) After turning VR951, voltage of D.M.M adjustment as
same as Va voltage which on label of panel right/top.
(Deviation; ±0.5V)
(Deviation; ±0.5V)
Each PCB assembly must be checked by check JIG set.
(Because power PCB Assembly damages to PDP Module,
especially be careful)
(Because power PCB Assembly damages to PDP Module,
especially be careful)
(Fig.1) Connection diagram of power adjustment for measuring
<42” EAY3292701>
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6. EDID (The Extended Display
Identification Data)/ DDC (Display
Data Channel) download
Data Channel) download
* Caution
(1) Use the proper signal cable for EDID Download.
- Analog EDID : Pin3 exists.
- Digital EDID : Pin3 exists.
- Digital EDID : Pin3 exists.
(2) Never connect HDMI & DVI-D & DVI-A Cable at the same
time.
(3) Use the proper cables below for EDID Writing.
6-1. EDID Data
6-2. Setting of device
6-3. Preparation for Adjustment
1) As above Fig. 2, 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
Device Address : A0
PageByte : 8
4) Power on the Set.
6-4. Sequence of Adjustment
- EDID Download
1) Init the data.
2) Load the EDID data.(Open File).
[Analog file] (for RGB)
[Digital file] (for HDMI)
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.
6) If TV has two HDMI, you must download two times for
4) Push the “Write Data & Verify”button. And confirm “Yes”.
5) If the writing is finished, you will see the “OK” message.
6) If TV has two HDMI, you must download two times for
each HDMI.
(Fig. 2) Connection Diagram of DDC download
Open File
Open File
Item
Manufacturer 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
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- EDID DATA
1) Analog RGB(128Byte).
2) HDMI1 RGB(256Byte).
=> Detail EDID Options are below(
,
,
,
,
-1,
-2,
-1,
-2)
3) HDMI1 RGB(256Byte).
=> Detail EDID Options are below(
,
,
,
,
-1,
-2,
-1,
-2)
1.
-> Product ID
2.
-> Serial No : Controlled on production line
3.
-> Month, Year : Controlled on production line
ex) Week : '03' => '03'
Year : '2006' => '10'
4.
-> Model Name(Hex):
5.
-1,
-2,
-1,
-2 -> Checksum : Changeable by total
EDID data
7. ADC Calibration
Model Name
42PT85-ZB
50PT85-ZB
-1
89
8A
-2
C2
C3
-1
CC
CC
-2
F2
BC
Model
Name
42PT85
50PT85
Product ID
Product ID
EDID table
B69C
B69C
Dec
Hex
9CB6
9CB6
Model Name
42PT85-ZB
50PT85-ZB
Hex Data
000000FC003432505438350A202020202020
000000FC003530505438350A202020202020
- System control RS-232 Host should be “PC“ for adjustment.
- Before AV ADC Calibration, execute the “Panel size selection“
- Before AV ADC Calibration, execute the “Panel size selection“
ADC
RF/AV/S-VIDEO
Component
RGB-PC
MSPG925FS PAL
Model:215 (720P)
Model: 60
INPUT SELECT AV3
Pattern:65
(1024*768 60Hz)
Model: 202 (PAL-BGDHI) 720P/50Hz
Pattern: 65
Pattern: 65
7 Color Bar
PAL 7 Color Bar
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