Minolta Di251f Service Manual page 159

.
Item
Symptom
No.
Clock malfunc-
tions
Neither "Send-
ing" nor "Receiv-
ing" are
displayed.
Cause
1 No improper operation?
2 Any improvement after
replacing FAX1 board?
3 Any improvement after
replacing MFB2 board?
1 Is an alarm message on
screen?
2 Is the external telephone on-
hooked?
3 Are you printing something
such as report?
4 Any improvement after
replacing AOP board?
5 Any improvement after
replacing the cable between
AOP and MFB2?
6 Any improvement after
replacing FAX1 board?
7 Any improvement after
replacing MFB2 board?
Refer Operator's manual for
YES
operation.
NO Go to item 2.
YES Replace FAX1 board.
NO Go to item 3.
YES Replace MFB2 board.
NO Replace the PWB-A.
Correct the failure and reset
YES
the alarm.
NO Go to item 2.
YES Go to item 3.
Set the external telephone
NO off-hook then press the com-
munication switch.
Proceed to communication
YES
after completing print jobs.
NO Go to item 4.
YES Replace AOP board.
NO Go to item 5.
Replace the cable between
YES
AOP and MFB2.
NO Go to item 6.
YES Replace FAX1 board.
NO Go to item 7.
YES Replace MFB2 board.
NO Replace the PWB-A
T-12
Remedy