Oki OKIFAX 5750 Maintenance Manual page 816

3.5.2.1 Electric check flowchart of DLK board
Yes
Replace IC509.
Replace IC changed to bit "1".
Replace IC509.
Replace IC506.
41285901TH Rev.3
No
IC505 - IC508
all IC changed?
No
1000→IC508 0100→IC507
0010→IC506 0001→IC505
No
Yes
IC506 and IC508
replaced?
No
No
0010?
Yes
Replace IC508.
START
Performs Self Diagnosis
without Jig Magnet.
0000/0000?
Yes
Performs Self Diagnosis
after putting Jig Magnet A
close to DLK board.
No
0000/0101?
Yes
Performs Self Diagnosis
after putting Jig Magnet B
close to DLK board.
0000/1010?
Yes
END
IC505 and IC507
replaced?
No
0000/0001?
Replace IC505. Replace IC507.
Yes
No
Replace IC509.
Yes
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