Troubleshooting
7 - 18
OKIFAX 5300/5600
Service Manual, P/N 59278301
Receive signal appears
across CN3-19, 20 (R) and
CN3-7 (GND) of WN5
board?
The error counter of LCD
stops counting up?
RX (Receiver)
Return to Sect. 7.1.1
No
Yes
Replace M17-x Board.
RX End
Receive signal appears
across L1 and L2?
Replace M17-x Board.
A
Possible cause:
CML signal
Yes
Replace NCU Board.
Yes
Solved?
Check the line.
Signal route:
CN1-3, 4
→
RL1-8, 5
→
T1-1, 3
→
T1-2, 6
→
CN3-19, 20 (R)
Yes
No
No
No
Yes
Signal route:
CN10-A6, B6 (R)
→
IC12-3
→
IC8-60 (RXA1)
→
IC8-26 to 33 (AD0 to AD7)
Summary of Contents for OF5600
Page 376: ...Illustrated Parts List D 2 OKIFAX 5300 5600 Service Manual P N 59278301 1 Cabinet Assembly...
Page 388: ...Illustrated Parts List D 14 OKIFAX 5300 5600 Service Manual P N 59278301 5 Scan Unit...
Page 394: ...Illustrated Parts List D 20 OKIFAX 5300 5600 Service Manual P N 59278301 8 Option Telephone...