Oki OL1200 Service Manual page 151

LCD Status Messages: (4-4) Processor errors
Exception Error code
4 Address Error Exception
(Lead instruction, instruction fetch)
5 Address Error Exception (Store
instruction)
6 Bus Error Exception (Instruction Fetch)
7 Bus Error Exception
(Load instruction, store instruction)
7 Bus Error Exception
(Load instruction, store instruction)
8 System Call Exception
9 Breakpoint Exception
A Reserved Instruction Exception
B Coprocessor Unusable Exception
C Arithmetic Overflow Exception
- Turn the power off, then on.
- Replace the Control board.
Note: When replacing the Control board, install the EEPROM mounted on the replaced
board.
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Service Guide OL1200
Chapter 6 Troubleshooting Procedures
Remedy
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