Troubleshooting
7 - 19
OKIOFFICE 44
Service Manual, P/N 59276801
7.1.12 Tone Send Test
Perform TONE SEND TEST.
(See 6.8.)
Start
No
Tones appear at
L1 and L2?
Connect leads of frequency
counter (or oscilloscope)
across the line terminals
L1 and L2.
Yes
Note 1:
Note 2:
Tones appear across Pin A8, B8 (S)
and Pin A12, B12 (0V) of CN10 (MCNT)?
Replace R44 board.
Replace WN5 Board.
Solved?
Replace R44 Board.
Signal route:
IC8-26 to 33 (AD0 to AD7)
→
IC8-1, 2
→
IC12-7 (S)
→
CN10-A8, B8 (S)
Signal route:
CN3-15, 16
→
T1-3, 1
→
CN1-3, 4
Possible cause:
CML signal
End
Return to section 7.1.1
No
Yes
Yes
No
The tonal frequency (2100 Hz) will be sequentially
sent for 5 seconds on the line terminals L1 and L2.
As an example, signal route uses the WN5 (NCU)
board.
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...