Sanyo FISHER V95I Manual page 31

4-3-3. GUIDE ROLLER HEIGHT ADJUSTMENT
(See Figs.4-3-3 and 4-3-4)
1) Play the Alignment Tape (NTSC: VHJ-0006, PAL: VHJ-
0009) and check that the envelope waveform is at its
maximum at the tracking centre. Then, after loosening
the S guide roller and the T guide roller by rotating
them anticlockwise, tighten them in turn until the
envelope waveform becomes flat. If the envelope
waveform is not at its maximum at the tracking centre,
refer to section 4-3-4 and carry out a rough adjustment
of the horizontal position of the audio R/P head (ACE
head) before adjusting the guide rollers.
2) Adjust the S guide roller.
@ Press the tracking button (Channel-), and check
whether, when the envelope waveform has reached
50% of its maximum, the front half of the envelope
waveform is flat. If not, fine-tune the S guide roller
as follows.
a. If the front half of the envelope waveform is as
shown in Fig.4-3-4 (a), this means that you have
pressed the S guide roller too far. Therefore, loosen
it slightly, and when it is in the state shown in Fig.4-
3-4 (b), tighten it again, stopping when the envelope
waveform is flat.
b. If the front half of the envelope waveform is as
shown in Fig.4-3-4 (b), this means you have not
pressed the S guide roller far enough. Therefore,
tighten it slightly, stopping when the envelope
waveform becomes flat.
c. If the front half of the envelope waveform is as
shown in Fig.4-3-4 (c), it may happen that when you
tighten the S guide roller, the wrapper waveform
does not disappear, but sinks into the flat part, as
shown in Fig.4-3-4 (d). If this happens, the status
shown in Fig.4-3-4 (c) is normal, so loosen the S
guide roller, then tighten it again until the envelope
waveform is as shown in Fig.4-3-4 (c).
@) Check that at the tracking centre, the output of the
front half of the envelope waveform is not less than
80% of the maximum.
) Rotate the S guide roller 20° anticlockwise.
3) Adjust the T guide roller.
@)Press the tracking button (channel—) and check
whether, when the envelope waveform is 50% of
maximum, the back half of the envelope waveform
is flat. If not, loosen the T guide roller slightly, then
tighten it gradually until the back half of the
envelope waveform becomes flat.
@) Check that the output for the back half of the
envelope waveform is at its maximum at the
tracking centre.
4) Check that the envelope waveform does not fluctuate
when you switch from F-SEARCH to PLAY or from R-
SEARCH to PLAY. If it does fluctuate, repeat steps 3)
and 4).
~29~
Pressed Not pressed
too far far enough
Eccentric screwdriver
(VHJ-0003)
JIC) |
The tape should not pass along
the cylinder lead surface
Fig.4-3-3
If the envelope waveform In normal status, the waveform
is at maximum at the will be flat even when the
tracking centre, adjust to envelope waveform is reduced
flat. to 50%.
jex>
(b) S guide roller not
pressed far enough
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(d) S guide roller
pressed too far
aes
Fig.4-3-4
(a) S guide roller
pressed too far
(
(c) Normal status for
wrapper waveform
Pt