Troubleshooting
7 - 21
OKIOFFICE 44
Service Manual, P/N 59276801
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 section 7.1.1
No
Yes
Replace R44 Board.
RX End
Receive signal appears
across L1 and L2?
Replace R44 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 OKIOFFICE 44
Page 2: ...All specifications are subject to change without notice Service Manual OKIOFFICE 44 59276801...
Page 135: ...Disassembly 4 6 OKIOFFICE 44 Service Manual P N 59276801 Whole Unit Picture FX048 CP4 1 Fig 01...
Page 329: ...Illustrated Parts List D 6 OKIOFFICE 44 Service Manual P N 59276801 Section 2 Printer Unit...
Page 331: ...Illustrated Parts List D 8 OKIOFFICE 44 Service Manual P N 59276801 Section 3 Operator Panel...
Page 351: ...Illustrated Parts List D 28 OKIOFFICE 44 Service Manual P N 59276801 Section 12 Cables...
Page 357: ...Board Layout E 2 OKIOFFICE 44 Service Manual P N 59276801 MEM eps E 2 MEM PCB...
Page 358: ...Board Layout E 3 OKIOFFICE 44 Service Manual P N 59276801 TEL U eps E 3 TEL U PCB...
Page 359: ...Board Layout E 4 OKIOFFICE 44 Service Manual P N 59276801 Hook eps E 4 Hook PCB...
Page 388: ...OKIOFFICE 44 Service Manual Part Number 59276801 Printed in the USA...