Gestetner B147 Service Manual page 249

SC No. Item
[0104] Check sum All areas of the ROM DIMM
error 2 are checked. If the check sum
of all programs stored in the
ROM DIMM is incorrect, this
SC code is displayed.
SC 829
[0302] Composition The result of checking the
error (Slot 0) composition data of the RAM
in Slot 0 (CN5) on the
controller is incorrect.
[0401] Verification The data stored in the RAM in
error (Slot 1) Slot 1 does not match the data
when reading.
[0402] Composition The result of checking the
error (Slot 1) composition data of the RAM
in Slot 1 (CN6) on the
controller is incorrect.
SC 835
[1102] Verification The controller detects that the
error loop-back connector is not
properly connected.
[110C] DMA A DMA data abnormality is
verification error detected even when the loop-
back connector is properly set.
[1120] Loop-back The loop-back connector is not
connector error set when starting the detailed
self-diagnostics.
SC 840 EEPROM An error has occurred during
access error I/O processing.
SC 841 EEPROM read The EEPROM stores three
error different data in mirrored
areas.
SC 850 Network The network is unusable.
interface error
SM
Definition Possible Cause
Self-diagnosis error: optional RAM
• Not specified RAM
DIMM installed
• Defective RAM DIMM
Self-diagnosis error: Centronics interface
• Loose connection
• Defective loop-back
connector
• Defective Centronics
connector
• Defective controller
Defective EEPROM
Defective EEPROM
• Defective controller
Related
Troubleshooting Procedure
SCs
[XXXX]: Detailed error code
1. Turn the main switch off and on.
2. Replace the RAM DIMM.
3. Replace the controller board.
[XXXX]: Detailed error code
1. Turn the main switch off and on.
2. Check the connection between the
Centronics connector and loop-back
connector.
3. Reconnect the loop-back connector.
4. Replace the controller.
1. Replace the EEPROM on the
controller.
1. Replace the EEPROM on the
controller.
1. Turn the main switch off and on.
2. Replace the controller.
4-47
SC TABLE
Type
CTL
CTL
CTL
CTL
CTL
B147/B149/B190