Gestetner G056 Service Manual page 326

SERVICE CALL CONDITIONS
4.1.2 CONTROLLER SC CODE DESCRIPTIONS
The following table describes the controller error codes. These codes are displayed
at power-on, or after the power-on self diagnostic test, if an error occurs.
Important: Always try turning the main switch off and on and check if the problem
persists.
SC Level
640 B
641 B
670 B
671 B
800 B
818 B
⇒
819 B
G073/G074
Symptom
Controller to engine communication error.
Checksum error detected
between the controller and
the engine board.
Controller to engine communication error.
The controller receives no
response from the engine
board.
Engine start-up error
The ready signal from the
engine board is not detected.
Engine board mismatch error
Engine board and controller
mismatch detected.
Video data error
System timeout error
System program timeout
error detected.
Kernel abnormal end error
A HDD error or a software
error has occurred, terminating
the SCS process, gwinit
process, and finally the kernel
program. A system process
has exhausted the RAM.
Possible Cause/Required Action
• Defective controller
• Defective engine board
1. Check the connection between the
controller and the engine board.
2. Replace the engine board if the error is
frequent.
3. Replace the controller board if the error is
frequent.
• Defective controller
• Defective engine board
1. Check the connection between the
controller and the engine board.
2. Replace the engine board if the error is
frequent.
3. Replace the controller board if the error is
frequent.
• Defective engine board.
Replace the engine board.
• Wrong engine board installed.
• Wrong controller board installed.
Check the type of engine board and controller
board.
• Defective controller
• Defective engine board
1. Check the connection between the
controller and the engine board.
2. Replace the engine board if the error is
frequent.
• Defective controller
Replace the controller if it occurs frequently.
• HDD Error
Software application error RAM shortage.
4-2
Rev. 01/2003
SM