Mf Send Test (G3 Dual Line) - Oki OKIFAX 5750 Maintenance Manual

7.29 MF Send Test (G3 Dual Line)

Start
Connect oscilloscope probe
across the line terminals
L1 and L2.
Perform MF SEND TESTG3.
(See 6.11.)
MF signal appears
across L1 and L2?
End
41285901TH Rev.3
No
Yes
MF signal appears across CN2-A8, B8 (S)
of G3A board
MF signal appears across CN3-15 (S)
of WN5 board
Replace WN5 Board.
Yes
Replace G3A Board.
Return to section 7.23
Yes
Replace G3A Board.
Signal route:
IC202-9→IC203-6, 7
→IC203-2, 1→CN2-A8, B8
Yes
Replace DM2 Board.
Signal route:
CN3-15, 16→T1-3, 1→
CN1-3, 4
Solved?
No
Possible cause:
CML signal
No
No
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