Sony MP-F17W Service Manual page 22

Procedure St
7 Index position
8 Cassette out
9 Write
eratioa
1. Connect the CH-1 and CH-2 probes of oscilloscope to TP-2
of IF Board 52/53 and TP-3 of MFO Function Checker II.
The oscilloscope is triggered by CH-2.
2. Set the HOSL switch to side
O.
3. The following waveform can be obtained on TRK40.
Note: The horizontal range is 200J,lsec/div. The trigger phase is
minus.
Index
signal
(TP-3J
RFout
(TP-2}
+200
"sec
~
T
~
+600
"sec
Fig. 3·1 Index Phase Specification
4. Set the HOSL switch to side 1.
5. The waveform in Fig. 3-1 can be obtained on TRK40.
1. The OSKCHG indicator lights when the 50 Auto disk is
ejected.
1. Set the SW16 switch to 500 (250) side and then insert the
HO Level disk (Level disk).
2. Set the HOSL switch to side
O.
3. Move head until it arrives at TRK79.
4. When the WRITE switch is pressed and 12F", 11F", ''Mil or
''W"
are written, the corresponding waveform can be obtained
at TP-2 on IF Board 52/53. (Refer to Fig. 3-2)
5. Set the HOSL switch to side 1, and 12F", 11F", "Mil or
''W"
are written, the corresponding waveform can be obtained at
TP-2 on IF Board 52/53. (Refer to Fig. 3-2)
(b} tF
(el M (d} W
Fig.3·2 2F, 1F, M, WSignal Wavefom7'
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