Adjustment Method; Required Test Equipment - LG 50PM1M Service Manual

Each PCB assembly must be checked by check JIG set.
(Because power PCB Assembly damages to PDP Module,
especially be careful)
4. POWER PCB Assy Voltage
Adjustments
4-1. Test Equipment :
4-2.Connection Diagram for Measuring
: refer to fig.3

4-3. Adjustment Method

[P/No 3501V00221A 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 P805, connect
- terminal to GND pin of P805.
3) After turning RV601, 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 P805, 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)
Va
P806
GND
NC
VS
P805
DMM
Va ADJ
RV601
+ -
P804
P807
P801 P802
(Fig. 3) Connection diagram of power adjustment for measuring
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
(Va, Vs Voltage Adjustments)
D.M.M. 1EA
Vs ADJ
RV401
P803
5-2. Setting of device
(Fig. 4) Connection Diagram of DDC download
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.
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