FIC a440 服务手册
Troubleshooting and Repair
FIC A440 Series Service Manual
6-23
6.4.18 IR Interface Check
18
Check IR Power
Check I/O board U604
Pin 1 = +5V
Check IR Component
Replace IR
Check IR signal
Check I/O board U604,
Pin 8, 9 Signal
END
NO
YES
NO
NO
YES
YES
Figure 6-17
IR Port Interface Check
6.4.19 LCD Panel Interface Check
19
Check LCD power
Check LCD Control
Signal
Check CN17 Pin 56 (Enalcp)
60 (Contrast), 63 (Invena)
65 ( Brightness)
Check LCD clock
Signal
Check CN17 Pin 51 (SCLK)
53 (SFLM), 57 (SLP), 59 (SDE)
Check LCD Data
Signal
Check CN17 LCD0~23 Signal
END
NO
NO
NO
YES
YES
Check Different
Signal
Check U23, LV010+-, LV011+-,
LV012+-, LV01+-
NO
Check U21
Pin 1, 3 = +3V
NO
YES
YES
YES
Figure 6-18
LCD Panel Interface Check