Control Board - Samsung OFFICESERV 7100 Service Manual

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3.3 Control Board

Describes the problems and troubleshooting the problems that occur on control boards such
as MP10/11 and LCP boards.
3.3.1 MP10/11 Board
The procedure for resolving the problem that occurs on MP10/11 board is as follows:
3.3.1.1 Abnormal Processor Operation
The procedure for resolving the problem caused by abnormal MP10/11 board operation is
as follows:
Start
Is at least one LED of
MP10/11 board(s) ON?
Yes
Is CPU clock normal?
Yes
Is RESET signal HIGH?
Yes
Is DTACK signal ACTIVE(LOW)?
Yes
Is the initial booting performed?
Yes
After system
is booted, does the board
operate properly?
Yes
End
3-12
- Refer to '3.1.1 Checking Cabinet
No
Power'.
- Check the connection status of
MP10/11 board.
- Y1 power(#4) is abnormal: Check
No
adjacent circuits.
- Y1 power is normal but output is
abnormal: Replace Y1.
No
- U26(DS1706) if STEADY LOW.
- If CPU ADDR/DATA bus if VIBRATION.
Track the DTACK source and check
the operation such as source clock in
No
HIGH status
- DTACK of option board
- DTACK of main board
- DTACK of the time switch
- Check the multimedia card file name
No
- Scope if ADDR/DATA bus of
MP10/11 board is normal.
- Replace the flash memory(U15)
- Scope if ADDR/DATA bus of
No
MP10/11 board is normal.
- Replace the flash memory(U15)
© SAMSUNG Electronics Co., Ltd.