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Cylinder assembly replacement
S, T slider replacement
ACE head assembly replacement
S, T guide roller replacement
1)
ACE head assembly coarse adjustment
Linearity adjustment
(Note 1)
1, ACE HEAD
HEIGHT
FINE
ADJUSTMENT
Playback
stereophonic
alternative
recording
signal
(300-500Hz)
on
alignment tape.
Turn
the Audio
height
adjusting
screw until audio envelope signal
becomes as flat as possible.
Adjust as described in the Electrical
Adjustment Section (Servo circuit.) in
each service data.
1. AUDIO HEAD HEIGHT
ADJUSTMENT (AUDIO HEIGHT
ADJUSTING SCREW)
Playback the tape recorded in SP
mode. Adjust position of the upper
flange of tape and that of
the
audio head.
+ Playback E-240 tape in |
mode.
Playback the 3 MHz video signal
'on the alignment tape.
Trigger scope with switching pulse.
Adjust tracking control for maxi-
mum
envelope
output by pushing
channel
(tracking)
up/down
but-
tons.
+ Confirm the portion of
lower flange on No.8 guid
. ENTRANCE SIDE ENVELOPE
ADJUSTMENT
Rotate S guide rotler until entrance
y
side envelope becomes as flat as
possible.
. AUDIO HEAD TILT ADJUSTMENT
(TILT ADJUSTING SCREW)
Playback
the tape in SP mode
continuously. Adjust Audio head tilt
screw so that tape transports along
lower flange of No. 8 guide.
2. NO. 9 GUIDE
If tape travels out of uppe
flange as shown above, pinc
or capstan motor or No.g
lever is defective.
Replace the defective part(s
3._EXIT SIDE ENVELOPE
-ADJUSTMENT
Rotate T guide rotler until exit side
envelope
becomes
as
flat
as
possible.
2. AUDIO HEAD TILT FINE
ADJUSTMENT
Playback alignment tape in CUE or
double speed mode.
Adjust Audio head tilt untill tape
runs along lower flange of No. 8
guide.
Tape
. LINEARITY CHECK
Press the channel
(tracking) up/
down
buttons
alternately,
make
sure envelope
increases
or de-
creases with flat response kept.
No. 8 guide flange
. AUDIO AZIMUTH ADJUSTMENT
(AZIMUTH
ADJUSTING SCREW)
Playback
7 kHz
audio
signal
on
alignment tape and adjust for max.
output.
3. ACE HEAD HEIGHT FINE
ADJUSTMENT
JING
Playback
alignment tape as de-
scribed in step 1, make sure audio
envelope signal becomes as flat as
possible
cla=
0.75
b, d/a = 0.63
(S-VHS mode!)
b,c, d/a WW 0.75
(Non S-VHS model)
. ACE HEAD POSITION
ADJUSTMENT
. AUDIO HEAD AZIMUTH
FINE ADJUSTMENT
For the linearity adjustment, make
sure adjusted
value should
be
checked
with
3 MHz
(SP) video
signal
after
completion
of
specified
adjustments
using
3
MHz
(LP)
video
signal
in
alignment tape.
Playback 7 kHz audio signal on
alignment tape.
Turn the azimuth adjusting screw
to obtain maximum output.
Playback
video
envelope
signal
3 MHz (A ch) on alignment tape in
SP mode. Set tracking control at its
center. Adjust ACE
main base to
obtain max. output.
6. ACE HEAD POSITION
+ Set tracking at its center
pushing channel (tracki
down buttons simultaneo
Playback
3 MHz
videc
(LP mode)
on
the al
tape. Slide ACE
main
obtain max. envelope,
. AUDIO HEAD HEIGHT CHECK
Repeat same step as step 3.
Playback
3 MHz
(A ct
signal
(LP
mode)
«
alignment tape .
Confirm
that
differenc
tracking
Center is withi
when
maximum
enve
obtained.
+ If not, readjust in LP moc
a
2-37
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