Auto Dial Failure - Oki B 4100 Maintenance Manual

7.1.6

Auto Dial Failure

Yes
Yes
Return to section 7.1.1
40055101TH Rev.4
Start
Manual dial OK?
Yes
Test other fax machines
under the same
conditions. Do they
dial automatically?
Yes
Yes
DIALING on LCD?
No
No
TELEPHONE BUSY
on LCD?
Yes
Hang up external
telephone set
Solved?
No
Replace NCU Board.
Solved?
No
Replace MCNT Board.
No
Can you hear dial tone when
lifting up your handset?
Check pulse dial/tone dial, dial rate, etc.
Check closed network.
(Note 1)
No (Others cannot dial
automatically either)
Each location causes
the problem?
Check the following items:
* Off-hook bypass OFF (TF No. 20)
* MF/DP (Dial parameter)
* DP rate (Dial parameter)
* DP make ratio (Dial parameter)
* Dial type (Dial parameter)
* Other dial parameters
Note: TF=Technical function
Yes
Solved?
Check the following items:
* Programmed one-touch keys
* Programmed two-digit auto dial
code
Note 1: If you do not have any other fax machine
(OKIOFFICE 44/OKIFAX 4100) for testing,
follow this route. Then, if the problem is
unsolved, return to the main route.
Note 2: NCU Board is shown as UNC for US version,
WN5 for INT'L version, DN5 for FTZ version
and FN5 for France, and UK version.
No
Yes
1. Check the line cable.
2. Check the exchange.
No (Only specific
locations)
Yes
No
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