OKIFAX 5700/5900 7 - 187.14 MF Send TestStartNoMF signal appearsacross L1 and L2?Yes MF signal appears across Pin 2 (S)and Pin 1 (0V) of CN201 (C34 or H34)Replace C34 or H34Modem Board.Replace WN5 Board.Solved?Replace MCNT (R76) Board.Signal route:CN3-15, 16→T1-3, 1→CN1-3, 4EndNoYesYesNoReturn to section 7.1Connect oscilloscope probeacross the line terminalsL1 and L2.Perform MF SEND TEST.(See 6.11.)Possible cause:CML signalSignal route:IC202-9→IC203-6, 7→IC203-2, 1→CN201-2MF signal appears across CN12-A8, B8(S) and CN12-A12, B12 (0V)of MCNT (R76) Board?Replace MCNT (R76) Board.NoYesSignal route:CN11-A25→CN12-A8, B8 (S)
