Read LG 47LB7DF (CHASSIS:LJ81A) Service Manual online
4.4 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
"4.Baud Rate" to 115200. Then check RS-232C control and
4.5 Selection of Country option.
• Models : All models which use LA75A 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)
defends on its market using "Vol. +/-"butto
5. GND and ESD Testing
5.1 Prepare GND and ESD Testing.
• Check the connection between set and power cord
5.2 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
• 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.
5.3 Check Items.
• Test Voltage
- GND: 1.5KV/min at 100mA
- Signal: 3KV/min at 100mA
- Signal: 3KV/min at 100mA
• Test time: just 1 second.
• Test point
• 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. Default Service option
6.1 ADC-Set
• R-Gain adjustment Value (default 128)
• G-Gain adjustment Value (default 128)
• B-Gain adjustment Value (default 128)
• R-Offset adjustment Value (default 64 )
• G-Offset adjustment Value (default 64 )
• B-Offset adjustment Value (default 64 )
• G-Gain adjustment Value (default 128)
• B-Gain adjustment Value (default 128)
• R-Offset adjustment Value (default 64 )
• G-Offset adjustment Value (default 64 )
• B-Offset adjustment Value (default 64 )
6.2 White balance. Value.
O 42LB7DF
Cool
Mid
Warm
MAX
R Gain
184
192
192
192
G Gain
189
184
150
192
B Gain
192
161
84
192
R Cut
64
64
64
127
G Cut
64
64
64
127
B Cut
64
64
64
127
O 47LB7DF
Cool
Mid
Warm
MAX
R Gain
192
192
192
192
G Gain
189
175
157
192
B Gain
153
127
57
192
R Cut
64
64
64
127
G Cut
64
64
64
127
B Cut
64
64
64
127
6.3 Temperature Threshold
• Threshold Down Low
20
• Threshold Up Low
23
• Threshold Down High 70
• Threshold Up High
• Threshold Up High
75
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