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(2) Tape transport system adjustment flow chart
Cylinder assembly repiacement
S, T slider replacement
ACE head assembly replacement
Capstan motor assambly replacement
Pincn lever assembly replacement
Cylinder motor repiacement
ACE head assembly coarse adjustment
1. AUDIO HEAD HEIGHT
ADJUSTMENT (AUDIO HEIGHT
ADJUSTING SCREW)
Playback te tape recarded in SP
mode. Adjust positon of the upper
flange of tape and that of
the
audio head.
2. AUOIO HEAD TILT ADJUSTMENT
{TILT ADJUSTING SCREW,
Piayoack the tape in SP mode
continuously. Adjust Audio head bit
SCraw SO inal tape transports along
lower flange of No 8 guide.
3, AUDIO AZIMUTH ADJUSTMENT
(AZIMUTH ADJUSTING SCREW)
Playoack 7 kHz audio signa! on
alignment tape and adjust for max.
Output.
4, ACE HEAD POSITION
ADJUSTMENT
Playback
video
envelope
signal
2 MHz {A cn) on alignment tape in
SP mode. Sat tracking contro! at ts
center. Adjust ACE
main pase to
obtain max. output,
Upper cylinder assembly replacement
2)
g
3)
Playback phase adjustment
==
Adjust as described in the Electrical
Adjustment Sectian (Servo circuit.) in
each service data.
No. 8 guide flange
Tension lever assembly replacement
impedance roller replacement
FE head repiacement
S, T guide roller replace.
t
Linearity adjustment
(S, T guide roller)
(Note 1)
1. MAXIMUM ENVELOPE OUTPUT
Playback the LP white video signal
'on the alignment tape (ST-C6).
Trigger scope with switching pulse.
Adjust tacking conwol
for maxi-
mum
envelope
output
by pushing
channel
(tracking) up/down
but-
tons,
2_ ENTRANCE SIDE ENVELOPE
ADJUSTMENT
Rotate S guide rotler unui! entrance
side envelope becomes as flat as
possible.
3 EXIT SIDE ENVELOPE
Al
TM
Rotate T guide rolier until exit side
envelope
becomes
as
flat
as
possible.
4_ LINEARITY CHECK
Press the channel
(tracking) up/
down
buftons
alternately,
make
sure
envelope
increases
or
de-
creases with Hat response kept.
cae
0.75
(S-VHS model)
b, d/a 2 0.63
b.c. da & 0.75
(Non S-VHS model}
For the linearity adjustment, make
sure
adjusted
value
should
be
checked with 2 MHz (SP) signa!
aher completon of specified ad-
jusiments using 30% white (LP)
signal in alignment tape.
2-38
Regi ciutch assembly replacement
Reol lable replacement
Taper nut replacement
ACE haed assembly fine adjustment
1_ ACE HEAO HEIGHT FINE
ADJUSTMENT
Playback
stereophonic alternative
recording
signal (300-500Hz)
on
alignment tape.
Turn
the Audio
height adjusting
screw until audio envelape signal
becomes as fai as possible.
2. AUDIO HEAD TILT FINE
"ADJUSTMENT
Playback alignment tape in CUE or
double speed made.
Adjust Audio head ult until tape
tuns along lower fiange of No. 8
guide.
ACE HEAD HEIGHT FINE
"ADJUSTMENT
Playback
alignment
tape
as
de-
scribed in Step 1, make sure audio
envelope signal becomes as flat as
possible
4. AUDIO HEAD AZIMUTH
FINE ADJUSTMENT
Playback 7 kHz audio signa! on
alignment tape.
Turn the azimuth adjusting screw
to obtain maximum output
5. AUDIO HEAD HEIGHT CHECK
Repeat same step as step 3.
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