8 Troubleshooting
8-6
SAM4S ER-380M/F SERIES
8-5 Key Board Problem
End
Key Board Problem
Key Input
Failure ?
Y
N
1. Check the Key Scan Part 74HC138(U21)
2. Check the Key Return Part 74HCT541(U23)
3. Check the related Circuit and Pattern
4. Check & Change Key Board Assy
5. Check the KBD Connector on PBA
Specific Key
Failure?
1. Check the affected Key
2. Check the Matrix Bus & Data Bus
3. Check the Diodes(D20~D27)
4. Check the Key Board Assy
N
Mode Key
Ok?
Y
Y
1. Check the Harness & Mode Key Assy
2. Check Diode (D12)
3. Check the 74HCT541 & Data Bus & CPU P10.3
N
Содержание ER-380F
Страница 2: ......
Страница 19: ...2 Product Specifications 2 12 SAM4S ER 380M F SERIES MEMO ...
Страница 31: ...5 Maintenance and Adjustment 5 2 SAM4S ER 380M F SERIES MEMO ...
Страница 39: ...6 Reference Information 6 8 SAM4S ER 380M F SERIES MEMO ...
Страница 51: ...8 Troubleshooting 8 4 SAM4S ER 380M F SERIES ...
Страница 54: ...8 Troubleshooting SAM4S ER 380M F SERIES 8 7 ...
Страница 57: ...8 Troubleshooting 8 10 SAM4S ER 380M F SERIES MEMO ...
Страница 73: ...9 Exploded Views and Parts List 9 16 SAM4S ER 380M F SERIES MEMO ...
Страница 85: ...10 PCB Layout and Parts List 10 12 SAM4S ER 380M F SERIES MEMO ...
Страница 89: ...12 Wiring Diagram 12 2 SAM4S ER 380M F SERIES MEMO ...
Страница 105: ...13 16 SAM4S ER 380M F SERIES ...
Страница 107: ...13 18 SAM4S ER 380M F SERIES MEMO ...
Страница 109: ......
Страница 110: ...ⓒ Shin Heung Precision March 2004 Printed in KOREA V1 0 Code No JK68 60955A ...