Gestetner A193 Service Manual page 509

SC920: MSU connection error (A193/A224)
-Definition- [B]
The MSU set signal is not detected
- Possible cause -
•
Poor connection between the BICU board and the MSU
•
BICU board defective
•
MSU defective
SC921: MSU hardware error (A193/A224)
-Definition- [B]
The hardware of the MSU is defective
- Possible cause -
•
MSU defective
•
BICU defective
•
Front door safety switch does not work properly
SC980: Program loading error (A193/A224)
-Definition- [C]
The program cannot load properly.
- Possible cause -
•
Poor connection between the BICU and the ROM board
•
BICU board defective
•
ROM board or the program defective
SC981: NVRAM clear error (A193/A224)
-Definition- [C]
The data stored in the NVRAM is not cleared properly when the Memory All
Clear is performed.
- Possible cause -
•
NVRAM defective
SM
SC CODE DESCRIPTIONS
13-75 A224