DOWNLOAD LG 22LV255C-UA (CHASSIS:LA0AA) Service Manual ↓ Size: 3.13 MB | Pages: 48 in PDF or view online for FREE

Model
22LV255C-UA (CHASSIS:LA0AA)
Pages
48
Size
3.13 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
22lv255c-ua-chassis-la0aa.pdf
Date
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LG 22LV255C-UA (CHASSIS:LA0AA) Service Manual ▷ View online

1. Power-up boot check
Check X1002 clock
32.76 KHz
Replace X1002
Replace Q7506
Check Mstar LVDS Output
Replace Mstar(IC101) or Main Board
ok
ok
ok
ok
ok
ok
ok
No
No
No
No
Check X201 Clock
24 MHz
Replace X201
ok
No
Check Adater power.
JK7500 : 24V 
Replace Adapter
No
Check Micom Voltage
IC1002  pin 48 : +3.5V_ST
Replace IC7503
Check IC1002 PIN 36(RL_ON).
RL_ON : 3.3V
Replace Micom(IC1002) or Main board
Re-download 
Micom software.
No
No
Check IC7502/6/7, IC403/7 Output Voltage
IC7502 : 12V
IC7506 : 3.3V
IC7507 : 5.0V
IC403 : 1.26V
IC407 : 1.5V
No
Replace IC7502/6/7, IC403/7
Check LVDS Power Voltage
Q7506 : 12v(26”)
Change Module
ok
No
Check Inverter Control & Error Out
P7501 11 pin : Low
P7501 12 pin : High
Check  Module
2. Digital TV Video
Check RF Cable & Signal
Check Tuner 3.3V Power
L3703
Replace L3703
Check Tuner 1.2V Power 
IC3703  2 pin : 1.2V
Check IF_P/N Signal
TU3702 17/18 Pin
Replace IC3703 
Check Tuner 5V Power
L3702
Check IC7952, IC7861
Check Mstar LVDS Output
Replace Mstar(IC101) or Main Board.
ok
ok
ok
ok
ok
No
No
No
No
No
Replace IC7952, IC7861
No
Bad Tuner. Replace Tuner.
Replace L3702
ok
3. Analog TV Video
Check RF Cable & Signal
Check Tuner 3.3V Power
L3703
Replace L3703
Check Tuner 1.2V Power 
IC3703 2 pin : 1.2V
Check CVBS Signal
TU3702 11 Pin
Replace IC3703 .
Check Tuner 5V Power
L3702
Check Mstar LVDS Output
Replace Mstar(IC101) or Main Board.
ok
ok
ok
ok
ok
No
No
No
No
No
No
Bad Tuner. Replace Tuner.
Replace L3702
ok
Check IC7952, IC7861
Replace IC7952, IC7861
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