Sony MP-F17W Service Manual page 23

P roc eduE e St
10 Output levd
11
Peak Shift
12
Track positioning
eration
1.
Set the SW16 switch to 500 (250) side and then insert the
HD Level disk (Level disk).
2. Set the HDSL switch to side O.
3. Write "2F". The output signal levd is more than 0.06Y
(0.05V). (Refer to Fig. 3-2
(a»
4. Set the HDSL switch to side 1. Write "2F". The output
signal level is more than 0.06Y (0.05Y). (Refer to Fig. 3-2
(a»
1. Set the SW16 switch to 500 (250) side and then insert the
HD Level disk (Level disk).
2. Set the oscilloscope to only "CH-2" mode.
3. Change the CH-2 probe location of the oscilloscope from
TP-3 on MFD Function Checker II to TP-4.
4. Set the HDSL switch to side O.
5', Write "M" or ''W'' onto TRK 79, Such w av eform as shown in
Fig. 3-3 can be obtained at TP-4 on MFD Function Checker
II.
The waveform in' Fig. 3-3 shows the read data,
less than 2.45 ~sec
(less than 4,85 "secl
Fig.
3·3
Waveform of RD Data
6. Set the HDSL switch to side 1.
7. Repeat item 5.
1. Eject the HD Level disk (Level disk) and then insert the 50
Auto disk.
2. Return the CH-2 probe location of the TP-4 (RDDATA) on
MFD Function Checker II to TP-3 QNDEX).
3. Set the HDSL switch to side O.
4. Such a Cat's eye pattern signal as shown in Fig. 3-4 (a) can
be obtained when the head accesses TRKOO, 22, 27,
31,
36,
40, 45, 49,
54, 58,
63 or 79. The oscilloscope is triggered
by CH-2.
Note: Such a signal as shown in Fig. 3-4 (b) ,can be obtained
when the head accesses TRK40.
5. Set the HDSL switch to side 1. Such a Cat's eye pattern
signal as shown Fig. 3-4 (b) can be obtained when the head
accesses TRK40.
6. Set' the HDSL switch to side 0 again.
7. Move the head onto TRK40.
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