6 Troubleshooting
SAM4S SAP-630 SERIES 6-7
6-7 Main B’D problem (Key Board, Mode key, Drawer, MCR, Dallas-key)
6-7-1 Key Board & Mode Key
Key Board Operation Fail
→ Check the FPC harness between Key Board and IO B’D.
→ Check the key scan part (74HC138, U24, U26, U27) and key return part(74HCT541, U25).
→ Change the Key board Assy
→ Check related circuit & component whether short or not.
Mode key Operation Fail
→ Check the harness between Mode Key and LCD B’D.
→ Check the key return part(74HCT541, U25).
→ Change the mode key Assy
→ Check related circuit & component whether short or not.
6-7-2 Drawer & Compulsory
Drawer Operation Fail
→ Check Drawer specification whether it is +24V drawer or not.
→ If +12V drawer is installed, System can be shutdown when open the drawer
→ Check the cable. Refer to Chapter 2 for cable connection.
→ Check related circuit & component whether short or not.
Compulsory Fail
→ Check the cable and compulsory connector.
→ Check the micro switch in the Drawer.
6-7-3 MCR (Magnetic Card Reader)
Operation Fail
→ Check the harness between MCR and Main B’D, if it is connected or not.
→ Check the connection between MAIN B’D and IO B’D, if communication is OK or not.
→ Check the CPU on IO B’D whether it works normally or dead.
→ Check related circuit & component whether short or not.
6-7-4 Dallas-Key
Operation Fail
→ Check the harness between Dallas-Key and Main B’D, if it is connected or not.
→ Check the MICOM on Main B’D whether it works normally or dead.
→ Check related circuit & component whether short or not.
→ If these are OK above but Dallas-Key does not work, Please contact our R&D.
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