Oki B4100 - Manual (Page 257)

40055101TH Rev.4 257 /
(2) No 5 V(S) output
Start
No
No
No
No
Yes
Yes
Yes
Yes
Replacement
To flowchart
(6) for no heater
output.
To flowchart
(3) for no 5 V
output.
Replacement
Any of D11 to D14
short-circuited
1. IC3 fault
2. Short circuit at output end
Isn't fuse Fl blown?
Isn't fuse F2 blown?
Is the voltage across
C26 at 6 V or more?
Is the voltage across
C27 at 5.6 V or more?
End
Low-voltage Selection.