Overall Troubleshooting Flow Chart - Oki OKIFAX4550 Maintenance Manual

7.1

Overall Troubleshooting Flow Chart

Start
LCD works?
ALARM LED lights?
Key operation activates
the OKIFAX 4550/
OKIOFFICE87
(Pressing SELECT FUNCTION key causes
"SELECT FUCTION (OT) MEMORY AVALI=100%" to appear on LCD?
Pressing STOP key makes a key touch-tone?)
Perform SELF-DIAGNOSIS.
Print test OK?
FLASH memory check OK?
RAM check OK?
Local copy OK?
Auto dial OK?
Transmission problem?
Auto reception OK?
Reception problem?
Verify symptom.
41309401TH Rev.4
No
Yes
Yes
No
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
Yes
No
No
Yes
Yes
No
Go to 7.2 (No LCD operation).
Go to 7.3 (ALARM LED on).
Replace MCNT and/or OPE (O4W) unit.
Note*:
OPT-RAM "OK" or "NG" is
printed when the MEMORY board
(Option) is inserted on the MCNT
board.
Go to 7.4 (Printing test failure).
Replace FLASH memory(s) on MCNT
board
Replace RAM(s)
(RAM2, 3 on 46F board)
(RAM1 on R46 board)
Go to 7.5 (No local copy).
Go to 7.6 (Auto dial failure).
Go to 7.7 (Transmission problem).
Go to 7.8 (Auto reception failure).
Go to 7.9 (Reception problem).
Note: 46F/R46 board for OKIFAX4550/
OKIOFFICE87 is shown as MCNT.
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