LG 42PN4500 Service Manual page 10

● When tester will measure on Cool condition, adjust W30 on
TV display menu.
● When tester will measure on medium condition, adjust 0 on
TV display menu.
● When tester will measure on warm condition, adjust W30 on
TV display menu.
● Using CA-210 Equipment. (10 CH)
- Contrast value: 216 Gray
Color Test
temperature Equipment
COOL CA-210
MEDIUM CA-210
WARM CA-210
- Brightness spec.
Item White average
brightness
Min 49
Typ 60
Max
Unit cd/m²
Remark - 100% Window White
Pattern
- 100IRE(255Gray)
- Picture: Vivid(Medium)
5.3. Test of RS-232C control.
- Press In-Start button of Service Remocon then set the
"4.Baud Rate" to 115200. Then check RS-232C control and
5.4. Selection of Country option.
- Selection of country option is allowed only North American
model (Not allowed Korean model). It is selection of Country
about Rating and Time Zone.
■ Models: All models which PU31A Chassis (See the first
page.)
■ Press "In-Start" button of Service Remocon, then enter the
"Option" Menu with "PIP CH-" Button
■ Select one of these three (USA, CANADA, MEXICO) de-
pends on its market using "Vol. +/-"button.
* Caution : Don't push The INSTOP KEY after completing the
function inspection.
* Caution : Inspection only PAL M / NTSC
Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
Color Coordination
x y
0.276 ± 0.002 0.283 ± 0.002
0.285 ± 0.002 0.293 ± 0.002
0.313 ± 0.002 0.329 ± 0.002
Brightness uniformity
-20
+20
%
- 85IRE(216Gray) 100%
Window White Pattern
- Picture: Vivid(Medium)
6. GND and ESD Testing
6.1. Prepare GND and ESD Testing.
■ Check the connection between set and power cord
6.2. Operate GND and ESD auto-test.
■ Fully connected (Between set and power cord) set enter the
Auto-test sequence.
■ Connect D-Jack AV jack test equipment.
■ Turn on Auto-controller(GWS103-4)
■ Start Auto GND test.
■ If its result is NG, then notice with buzzer.
■ If its result is OK, then automatically it turns to ESD Test.
■ Operate ESD test
■ If its result is NG, then notice with buzzer.
■ If its result is OK, then process next steps. Notice it with
Good lamp and STOPER Down.
6.3. Check Items.
■ Test Voltage
● GND: 1.5KV/min at 100mA
● Signal: 3KV/min at 100mA
■ Test time: just 1 second.
■ Test point
● GND test: Test between Power cord GND and Signal
cable metal GND.
● ESD test: Test between Power cord GND and Live and
neutral.
■ Leakage current: Set to 0.5mA(rms)
6.4. POWER PCB Ass'y Voltage adjustment
(Va, Vs voltage adjustment)
6.4.1. Test equipment :
6.4.2. Connection Diagram for Measuring
: refer to fig.1
<XPOWER4 42T4H PSU>
(fig.1) PCB Assy Voltage adjustment
6.4.3. Adjustment method
6.4.3.1. Vs adjustment (refer fig.1)
(1) Connect + terminal of D.M.M. to Vs pin of P811, connect
-terminal to GND pin of P811
(2) After turning VR901, voltage of D.M.M adjustment as same
as Vs voltage which on label of panel left/top ( deviation ;
±0.5V)
6.4.3.2. Va adjustment (refer fig.1)
(1) After receiving 100% Full White Pattern, HEAT RUN.
(2) Connect + terminal of D.M.M. to Va pin of P811, connect
-terminal to GND pin of P811
(3) After turning VR502,voltage of D.M.M adjustment as same
as Va voltage which on label of panel left/top (deviation;
±0.5V)
- 10 -
: D.M.M 1EA
LGE Internal Use Only