Auto Dial Failure - Oki B 4100 Maintenance Manual

7.2.6

Auto Dial Failure

Yes
Yes
Replace MCNT Board.
Return to section 7.2.1
40055101TH Rev.4
Start
No
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
Can you hear dial tone when
lifting up your handset?
Yes
Check pulse dial/tone dial, dial rate, etc.
Check closed network.
(Note 1)
No (Others cannot dial
automatically either)
Each location causes
the problem?
Yes
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?
No
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
(OKIFAX 5000 series) 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 U.K. and France
No
1. Check the line cable.
2. Check the exchange.
No (Only specific
locations)
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