03/02 2.3 Level 2 Troubleshooting
WorkCentre Pro 423/428 2-73 CHAPTER 2 TROUBLESHOOTING
Internal
Code
Error Description Corrective Action
8C66 MF Frame length is over.
Check CONTROL PANEL-
MCU/SW PWB/M/F MAIN PWB
connections. Check M/F MAIN
PWB and ROM. Replace
CONTROL PANEL.
8C67 MF failure Check CONTROL PANEL-
MCU/SW PWB/M/F MAIN PWB
connections. Check M/F MAIN
PWB and ROM. Replace
CONTROL PANEL.
8C68 MF FF2 Check CONTROL PANEL-
MCU/SW PWB/M/F MAIN PWB
connections. Check M/F MAIN
PWB and ROM. Replace
CONTROL PANEL.
8C70
An unexpected message or data came
from PANEL-SYS (due to S/W bug)
Check CONTROL PANEL-
MCU/SW PWB/M/F MAIN PWB
connections. Check M/F MAIN
PWB and ROM. Replace
CONTROL PANEL.
8C71 TEL Job dial ring buffer full Check CONTROL PANEL-
MCU/SW PWB/M/F MAIN PWB
connections. Check M/F MAIN
PWB and ROM. Replace
CONTROL PANEL.
8C72 Failure in obtaining a message from
PANEL-SYS (importMsg return value is
incorrect.)
Check CONTROL PANEL-
MCU/SW PWB/M/F MAIN PWB
connections. Check M/F MAIN
PWB and ROM. Replace
CONTROL PANEL.
8C73
Failure in sending a message to PANEL-
SYS (exportMsg return value is
incorrect.)
Check CONTROL PANEL-
MCU/SW PWB/M/F MAIN PWB
connections. Check M/F MAIN
PWB and ROM. Replace
CONTROL PANEL.
8C74 Failure in attaching pnlif mon at M/C
initialization
Check CONTROL PANEL-
MCU/SW PWB/M/F MAIN PWB
connections. Check M/F MAIN
PWB and ROM. Replace
CONTROL PANEL.
Internal
Code
Error Description Corrective Action
8C75
No response is made after pnlif mon is
attached (at M/C initialization).
Check CONTROL PANEL-
MCU/SW PWB/M/F MAIN PWB
connections. Check M/F MAIN
PWB and ROM. Replace
CONTROL PANEL.
8C76 An event parameter received from
another task on MF-SYS is wrong.
(System error)
Check CONTROL PANEL-
MCU/SW PWB/M/F MAIN PWB
connections. Check M/F MAIN
PWB and ROM. Replace
CONTROL PANEL.
8C77 An undefined job status event was
received from Job Scheduler.
Check CONTROL PANEL-
MCU/SW PWB/M/F MAIN PWB
connections. Check M/F MAIN
PWB and ROM. Replace
CONTROL PANEL.
8C78
CONTROL PANEL response awaiting
time out (at M/C initialization)
Check CONTROL PANEL-
MCU/SW PWB/M/F MAIN PWB
connections. Check M/F MAIN
PWB and ROM. Replace
CONTROL PANEL.
8C79 Job Scheduler was requested to activate
a job, and an error occurred. (S/W bug is
a major cause)
Check CONTROL PANEL-
MCU/SW PWB/M/F MAIN PWB
connections. Check M/F MAIN
PWB and ROM. Replace
CONTROL PANEL.
8C7A Job Memory Register Process failure
(due to S/W bug)
Check CONTROL PANEL-
MCU/SW PWB/M/F MAIN PWB
connections. Check M/F MAIN
PWB and ROM. Replace
CONTROL PANEL.
8C7B
Registered Job Memory Cancel Process
failure (due to S/W bug)
Check CONTROL PANEL-
MCU/SW PWB/M/F MAIN PWB
connections. Check M/F MAIN
PWB and ROM. Replace
CONTROL PANEL.
8C7C Excess message resend to panel Check CONTROL PANEL-
MCU/SW PWB/M/F MAIN PWB
connections. Check M/F MAIN
PWB and ROM. Replace
CONTROL PANEL.
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