Mf Send Test - Oki B 4100 Maintenance Manual

7.1.14 MF Send Test

Connect oscilloscope probe
across the line terminals
L1 and L2.
Perform MF SEND TEST.
(See 6.11.)
MF signal appears
across L1 and L2?
40055101TH Rev.4
Start
No
Yes
MF signal appears across CN10-A8, B8
(S) and CN10-A12, B12 (0V) of MCNT Board?
Replace WN5 Board.
Yes
End
Replace MCNT Board.
Return to section 7.1.1
Yes
Replace MCNT 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
Solved?
No
Possible cause:
CML signal
No
253 /