LG 32LN5100 (CHASSIS:LL35B) Service Manual ▷ View online
Standard Repair Process Detail Technical Manual
Voltage and speaker checking method
when there is no audio
C. Audio error_No audio/Normal video
A16
Established
date
Revised
date
Error
symptom
Content
LCD TV
2013. 02. 15.
when there is no audio
<ALL MODELS>
date
②
Check the DC 24V, 12V,
3.5V.
3.5V.
18 Pin
(Power Board ↔ Main Board) -
공통
②
1
Power on
2
DRV ON
3
3.5V
4
PDIM#1
①
②
5
3.5V
6
PDIM#2
7
GND
8
GND
9
24V
10
24V
③
11
GND
12
GND
13
12V
14
12V
15
12V
16
N.C
17
GND
18
GND
Checking order when there is no audio
17
GND
18
GND
①
Check the contact condition of or 24V connector of Main Board
②
Measure the 24V input voltage supplied from Power Board
(If there is no input voltage, remove and check the connector)
35 / 37
③
Connect the tester RX1 to the speaker terminal and if you hear the Chik Chik sound when you touch the GND
and output terminal, the speaker is normal.
Standard Repair Process Detail Technical Manual
Remote controller operation checking method
D. Function error_ No response in remote controller,
key error
A17
Established
date
Revised
date
Error
symptom
Content
LCD TV
2013. 01 .09
Remote controller operation checking method
<ALL MODELS>
date
P600
1
GND
2
KEY1
②
3
KEY2
4
3.5V_ST
5
GND
6
LED_R/BUZZ
7
IR
③
②
7
IR
8
GND
9
GND
①
Checking order
1, 2. Check IR cable condition between IR & Main board.
3.
Check the st-by 3.5V on the terminal 4.
36 / 37
Standard Repair Process Detail Technical Manual
Remote controller operation checking method
D. Function error_ No response in remote controller,
key error
A17
Established
date
Revised
date
Error
symptom
Content
LCD TV
2013. 01 .09
Remote controller operation checking method
<ALL MODELS>
date
P600
1
GND
2
KEY1
②
3
KEY2
4
3.5V_ST
5
GND
6
LED_R/BUZZ
7
IR
③
②
7
IR
8
GND
9
GND
①
Checking order
1, 2. Check IR cable condition between IR & Main board.
3.
Check the st-by 3.5V on the terminal 4.
36 / 37
Standard Repair Process Detail Technical Manual
Remote controller operation checking method
D. Function error_ No response in remote controller,
key error
A17
Established
date
Revised
date
Error
symptom
Content
LCD TV
2013. 01 .09
Remote controller operation checking method
<ALL MODELS>
date
P600
1
GND
2
KEY1
②
3
KEY2
4
3.5V_ST
5
GND
6
LED_R/BUZZ
7
IR
③
②
7
IR
8
GND
9
GND
①
Checking order
1, 2. Check IR cable condition between IR & Main board.
3.
Check the st-by 3.5V on the terminal 4.
36 / 37