42PG20-UA (CHASSIS:PU84A) — LG TV Service Manual (repair manual). Page 5

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- 5 -
ADJUSTMENT INSTRUCTIONS
1. Application Range
This spec. sheet is applied to all of the PU84A 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) The adjustment must be performed in the circumstance of
25±5
c
C of temperature and 65±10% of relative humidity if
there is no specific designation.
(4) The input voltage of the receiver must keep 100~240V,
50/60Hz.
Caution : 42PG20-UA must keep 100 ~ 120V, 50/60Hz.
(5) The receiver must be operated for about 15 minutes prior
to the adjustment.
O
After RGB Full White in HEAT-RUN Mode, the receiver must
be operated prior to the adjustment.
O
Enter into HEAT-RUN MODE
(1) Press the POWER ON KEY on R/C for adjustment.
(2) Press the ADJ KEY on R/C and enter EZ ADJUST
Select “4. White Pattern” by using 
D
/
E
(CH +/-) and press
ENTER(
V
)
Select “White” by using 
F
/
G
(VOL +/-) and press
ENTER(
V
)
- 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 may be occur in the black level part of the
screen.
3. Download
(1) Execute ISP program “Mstar ISP Utility” and then click
“Config” tab.
(2) Set as below, and then click “Auto Detect” and check “OK”
message If display “Error”, Check connect computer, jig,
and set.
(3) Click “Connect” tab. If display “Can’t” , Check connect
computer, jig, and set.
(4) Click “Read” tab, and then load download file(XXXX.bin)
by clicking “Read”
(5) Click “Auto” tab and set as below
(6) Click “Run”.
(7) After downloading, check “OK” message.
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