LG DT-50PY10, Руководство по обслуживанию

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1. Application Object
These instructions are applied to all of the PDP TV, AF-046A.
2. Notes
(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 equipment.
(2) Adjustments must be done in the correct order.
(3) The adjustments 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 be must kept 220V, 60Hz
when adjusting.
(5) The receiver must be operational for about 15 minutes
prior to the adjustments.
O After receiving 100% white pattern, the receiver must be
operate prior to adjustment.(Or white condition in HEAT-
RUN mode)
O
Enter into HEAT-RUN MODE
- Press the POWER ON KEY on R/C for adjustment.
OSD display and screen display 100% full WHITE
PATTERN.
[
Set is activated HEAT-RUN without signal generator in
this mode.
3. EPLD Download
(1) Test Equipment: PC, Jig for download
(2) Connect the power of VSC B/D.
(3) Execute download program of PC.
(4) After executing the hot key on the Programmer, click icon
(5) End after confirming.
4. POWER PCB Assy Voltage
Adjustment
(Va, Vs Voltage Adjustment)
4-1. Test Equipment :
D.M.M 1EA
4-2. Connection Diagram for Measuring
Refer to Fig 1.
(1) Va Adjustment
1) After receiving 100% Full White Pattern, Heat-Run(over
10min).
2) C terminal of D.M.M to Va pin of P805 and
connect – terminal to GND pin of P805.
3) Adjust RV601 voltage to match that of the label on the
Top/Right of the panel. (Deviation : ±0.5V)
(2) Vs Adjustment
1) C terminal of D.M.M to Vs pin of P805 and
connect – terminal to GND pin of P805.
2) Adjust RV401 voltage to match that of the label on the
Top/Right of the panel. (Deviation : ±0.5V)
If you turn on a still screen more than 20 minutes (Especially
Digital pattern(13 CH), Cross Hatch Pattern), an afterimage
may occur in the black level part of the screen.
ADJUSTMENT INSTRUCTIONS
PC
VSC
B/D
<Fig 1> Connection Diagram of EPLD Download
Each PCB Assy must be checked by Check JIG Set before
assembly. (Especially, be careful Power PCB Assy which can
cause Damage to the PDP Module.)
Va ADJ
RV601
P806
P805
P807
Va
GND
NC
VS
DMM
+ -
P804
P801
P802
Vs ADJ
V401
P803
Va ADJ
RV601
P806
P805
P807
Va
GND
NC
VS
DMM
+ -
P804
P801 P802
Vs ADJ
V401
P803
<3501V00182B>
<3501V00188A>
<Fig. 2> Connection Diagram of Power Adjustment for
Measuring (Power Board)