Zenith P60W38 Series, Service Manual

Page: 16 / 49

1. Application Range
This service manual applies to all 60” PDP Monitors using the
RF-03LA chassis.
2. Specification.
(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). Unless otherwise specified, all adjustments must be
performed with room temperature between 20 and 30°C
with 55% to 75% relative humidity.
(4). The input voltage of the receiver must keep 100~240V,
50/60Hz.
(5). The receiver must be operated for about 15 minutes prior
to the adjustments.
* After RGB Full White in HEAT-RUN Mode, the receiver
must be operated prior to the adjustment.
* Enter into HEAT-RUN MODE
1) Press the POWER ON KEY on R/C for adjustment
2) Press the KEY. HEAT RUN WHITE OSD
display and screen display 100% full WHITE PATTERN.
- Set is activated HEAT run without signal generator in this
mode. Single color pattern ( RED / BLUE / GREEN ) of
HEAT RUN MODE uses to check panel.
Caution) If you turn on a still screen more than 20 minutes
(Especially digital pattern, cross hatch pattern), an after image or
screen burn may occur on the panel.
3. Adjustment item
3-1. SET assembly adjustment
(1). RGB Auto Cut-Off & MIN Bias & MAX Bias adjustment
standard equipment: VG828, VG854, 801GF, MSPG3240A
or same product
(2).Adjustment of POWER PCB Assembly voltage
(3). Adjustment of White Balance
(4).Adjustment of Component Off-Set
(5).DDC Data input
Caution> Each PCB assembly must be checked by check JIG
set.
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
4-3. Adjustment Method
4-3-1. PFC adjustment
(1) After receiving 100% Full White Pattern(06CH), HEAT
RUN.
(2) C terminal of DMM to TP1 PFC+(J8302)
,connect -terminal to TP2 PFC-(J8301)
(3) Adjust VR801 until voltage reading is 380V(±1V).
4-3-2. Va adjustment
(1) After receiving 100% Full White Pattern, HEAT RUN.
(2) C terminal of DMM to Va pin of P805,connect -
terminal to GND pin of P805.
(3) Adjust VR8401 until voltage reading matches the label
on the top/right of the panel( ±0.5V).
4-3-3. Vs adjustment
(1) C terminal of DMM to Vs pin of P805,connect -
terminal to GND pin of P805.
(2) Adjust VR8501 until voltage reading matches the label
on the top/right of the panel( ±0.5V).
- 16 -
ADJUSTMENT INSTRUCTIONS
Fig.1)connection Diagram of power adjustment for measuring
V
R801