Oki B721 Maintenance Manual

Oki Data CONFIDENTIAL
45487001TH Rev.1
6-23 /
6. Troubleshooting procedure
LCD Status
Message
READY
indicator
ATTEN-
TION
indicator
Beep Details
Error
code
Service Call
nnn:Error *
Off Blink On A fatal error occurred.
'*' specifies the detailed error cause.
For details refer to Table 8-1-2 “Service
Call Error List.”
Fatal
128
166
168
169
231
Power Off/On
nnn:Error
PC:nnnnnnnn
LR:nnnnnnnn
FR:nnnnnnnn
Off Blink On A fatal error occurred.
For details refer to Table 8-1-2 “Service
Call Error List.”
'nnnnnnnn' specifies the detailed error
cause.
Fatal
002~011
F0C
F0D
FFE
FFF
Power Off/On
209:Download
Error
Off Blink On Downloading Media Table to PU has
failed.
(Related to CustomMediaType.)
Fatal
209
Table 6-1-2 Service Call Error List
Panel display Cause Check details
Result
Solution
Service Call
001: Error
Machine Check
Exception
Hardware fault
detected.(Board
defectiveness or
Shortage of power
supply volume)
Replace the PU/
CU board.
Power Off/On
002: Error to 007:
Error
PC: nnnnnnnn
LR: nnnnnnnn
FR: nnnnnnnn
CPU unexpected
exception Does error display
reappear?
Ye s
Power Off/On.
Replace the PU/
CU board.
Power Off/On
009: Error
PC: nnnnnnnn
LR: nnnnnnnn
FR: nnnnnnnn
CPU unexpected
exception Does error display
reappear?
Ye s
Power Off/On.
Replace the PU/
CU board.
Power Off/On
010: Error
PC: nnnnnnnn
LR: nnnnnnnn
FR: nnnnnnnn
CPU unexpected
exception Does error display
reappear?
Ye s
Power Off/On.
Replace the PU/
CU board.
Power Off/On
011: Error
PC: nnnnnnnn
LR: nnnnnnnn
FR: nnnnnnnn
CPU unexpected
exception Does error display
reappear?
Ye s
Power Off/On.
Replace the PU/
CU board.
Service Call
030: Error
CU RAM Check
Error Does this error
message reappear?
Ye s
Power Off/On.
Replace the PU/
CU board.
Service Call
031: Error
CU Optional RAM
Check Error
Is RAM DIMM set
properly?
Is error recovered by
replacing RAM DIMM?
No
Ye s
No
Reset RAM DIMM
Replace program
RAM DIMM.
Replace the PU/
CU board.
Service Call
040: Error
CU EEPROM Error
Does error display
reappear?
Ye s
Power Off/On.
Replace the PU/
CU board.

Oki B721 Specifications

General

Print Technology	LED
Resolution	1200 x 1200 dpi
Processor	533 MHz
Memory	256 MB
Connectivity	USB, Ethernet
Duplex Printing	Standard