Sony EVO-720P - Page 225

7-4-2, Preparation for Adjustment
Perform cleaning of the tape running surface (the
individual tape guides, drum, capstan shaft and
pineb roller},
Connection of oscilloscope
lch ; CH2 checking pin of track shift jig
2ch:RF SWP checking pin of track shift jig
Set the SEL switch of the track shift jig to OFF,
then playback the alignment tape (WRS-1C) for
tracking, and confirm that the RF wavetorm of
both the entrance and exit sides become flat (Fig.
7-65. @).
If the RF waveform of both sides is not flat, the
adjustment should be carried out as described
below,
eIn case the RF waveform on the entrance side
is not flat (Fig. 7-65. ®)
vee Perform the adjustment according to 7-4-
8, Entrance Side Adjustment,
¢In case the RF waveform on the exit side is
not ‘flat (Fig. 7-65, ©)
‘sen Perform the adjustment according to 7-4-
4, Exit Side Adjustment.
L
@® Normal
© Entrance side is defective
© Exit side is defective
Fig. 7-65.
No.5 guide
No.7 guide
Capstan shaft
Pinch, roller
No.2 guide
No.1 guide.
No.3 guide
No.4 guide
No.8 guide
No.9 guide
No.10 guide
No.14- guide
Fig. 7-66. Tape guide arrangement diagram
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