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7-4-4.Guide Roller Adjustment (See Fig. 7-4-6.)
4) Press
the
tracking
control
key
and
set
the
1) Play back the alignment tape (NTSC HiFi 400Hz),
envelope
waveform
level to approx. 50%
of the
press
the
tracking
control
key
and
adjust
the
maximum.
In this condition, confirm
whether
the
envelope
waveform
to the
maximum
level.
envelope
waveform
is fiat. It will
not, showing
2) Loosen
the entrance
and
exit guide
rollers
by
valleys or peaks
at the first half (entrance) or
rotating
them
counterclockwise,
then
rotate
them
second
half
(exit), if the
guide
roller
pressure
clockwise
alternately
until
they are
fastened
and
is excessive
or
insufficient.
a flat video
output
waveform
is obtained.
In case
there
is unevenness
in the
first
half
3) Confirm
that
the
envelope
waveform
is
not
(entrance), adjust the entrance
side guide roller.
deformed,
and
check
visually
that
no
curling
If the
second
half (exit) shows
trouble, adjust
occurs
at
the
guide
roller
upper
and
lower
finely the exit side guide
roller.
flanges.
(Too
low
tape
{Too
low
tape
running
position
(Too
low
tape
running
position
running
position)
on
supply
side
guide
roller)
rola Mn ¢-1.4-10] OMI Tol: el] Ulfel- Mace) |(-18)
(@Reoromm alle an e-)°.:)
1 Royomme alle ]a Mun c-)°1: mae lavallacc Mm evox ind ioya]
(Too
high
tape
running
position:
running
position)
on
supply
side guide
roller)
on
take-up
side
guide
roller)
Fig. 7-4-6. Guide Roller Adjustment
ae
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