6-24 Troubleshooting and Repair
FIR Interface Check
LCD Panel Interface Check
18
Check FIR Power
Check U1
Pin 1, 10 = +5V
Check FIR
Component
Replace FIR
Check FIR signal
Check U1
Pin 2, 3, 8 signal
END
NO
YES
NO
NO
YES
YES
19
Check LCD Power
Check Q13 U25
+3V or +5V
Check LCD Control
Signal
Check L22, L26, L24,
L27, L37
Check LCD Data
Signal
Check L13 - L42 except
LCD control signals
END
NO
YES
NO
NO
YES
YES