Repair Flow Chart - Norcent LT3290 Service Manual

32'' LCD TV

5. Repair Flow Chart

5.1 Abnormal display
CHECK CN901 PIN9＝12V
CHECK CN407 PANEL connect is
normal?
CHECK X401、X701 is normal?
CHECK U401 PIN R5、PIN T8=3.3V?
U401 PIN E6=2.5V? PIN R9=1.8V?
CHECK U108 PIN18, PIN17, PIN14 output wave is OK;
PIN9 PIN20 power supply is OK?
CHECK I²C1DATA, CLK is normal?
CHECK SCALER HS VS is normal?
Check TV mode display is normal?
CN905 PIN3=5V?
OK
OK
OK
OK
OK
OK
OK
OK
Check Tuner circuit
NG
Check POWER BOARD
NG
Reconnect CN407
NG
Check surge circuit
NG
CHECK SCALER power
OK
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Norcent LT3290