Adjustment Instructions - LG MT-42PZ40/V/B/R/S Service Manual

1. Application Object
These instructions are applied to all of the PDP monitor, RF-
02RA.
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 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 110~240V,
50/60Hz in adjusting.
(5) The receiver must be operated for about 15 minutes prior
to the adjustment.
¤ After receiving 100% white pattern, the receiver must be
operate prior to adjustment.(Or white condition in HEAT-
RUN mode)
¤ŁEnter into HEAT-RUN mode
- Select the HEAT-RUN OFF by pressing ADJ Key on
Remote Control for adjustment.
- Press the VOL + Key in HEAT-RUN OFF.
(OSD display HEAT-RUN WHITE and screen display
100% FULL WHITE PATTERN)
[ Set is activated HEAT-RUN without signal generator in
this mode.
[ Single color pattern of HEAT-RUN mode uses to check
PANEL.(RED/BLUE/GREEN)
[Caution] If you turn on a still screen more than 20 minutes, a
afterimage may be occur in the black level part of the
screen.
Each PCB Assy must be checked by the Check JIG Set before
whole assembly. (Be careful the POWER PCB Assy not to
damage to PDP Module)
3. POWER PCB Assy Voltage Adjustment
(Va, Vs, -Vy, Vsetup Voltage Adjustment)
3-1. Test Equipment
D.M.M 1EA
3-2. Connection Diagram for Measuring
Refer to Fig 1.
3-3. Adjustment Method(POWERWELL)
(1) Va Adjustment
¤ Connect pin 1 of CN205 to (+) jack of D.M.M.
¤ŁAfter turning the VR3(Va ADJ), voltage of D.M.M
adjustment as same as Va voltage which on label of
panel right/top.(Deviation : ±0.5V)

ADJUSTMENT INSTRUCTIONS

(2) Vs Adjustment
¤ Connect pin 1 of CN207 to (+) jack of D.M.M.
¤ŁAfter turning the VR6(Vs ADJ), voltage of D.M.M adjust
as same as Vs voltage which indicated on label of panel
right/top.(Deviation : ±0.5V)
(3) -Vy Adjustment
¤ Connect pin 1 of CN208 to (+) jack of D.M.M.
¤ŁAfter turning the VR5(-Vy ADJ), voltage of D.M.M adjust
as same as -Vy voltage which indicated on label of
panel right/top.(Deviation : ±0.5V)
(4) Vsetup Adjustment
¤ Connect pin 5 of CN208 to (+) jack of D.M.M.
¤ŁAfter turning the VR4(Vsetup ADJ), voltage of D.M.M
adjust as same as Vsetup voltage which indicated on
label of panel right/top.(Deviation : ±0.5V)
[ Refer to Typical Voltage
1. Va : 35 ~ 45V
2. Vs : 170 ~ 185V
3. -Vy : -60 ~ -90V
4. Vsetup : 210 ~ 240V
[ Replace PDP Module or Power Board, adjust certainly Power
PCB Assy Voltage.
<Fig 1> Connection Diagram of POWERWEL Power Adj. for
- 10 -
Measuring