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6)
7)
8)
9)
Checks for Hi-Fi models only.
Recorded & reproduced
AFM envelope output max.
Tape
damage check
Se aise alle
envelope check
pon chec
+ Run E-240 tape in each mode
and check there is no damage at
each guide.
Playback 3 MHz video signal.
400 Hz AFM signal in alignment
tape ST-C7 in SP mode.
+ Records
signals
in SP
& LP
modes, using E-180, E-240 tape
and
playback
them
to
check
envelopes.
1. Playback
3 MHz
video signal
(LP mode) in alignment tape and
set review mode.
leview
Jpper/
|
Check video envelope max. point
(Ach).
2. Change
mode
from review to
play and check entrance side
envelope rises within 3s.
c/az
0.75
Check entrance side envelope
(Non S-VHS model)
tised within 3s, when mode
is | OK
b,d#/a2
0.63
changed from slot-in to play.
b,c,d/az 0.75
—(S-VHS model)
Check contro! pulse phase dif-
ference is within +3 ms from that
point to AFM envelope max. point.
3. Adjust S guide roller to readjust
linearity.
flower
lever
guide
Playback mode
Guide roller section damage
Back to step 3) linearity adjustment.
(or Slider assembly replacement)
Damage at No.8 guide brush
Back to step 1) ACE head assembly
coarse adjustment.
or Pinch lever replacement
Damage at No.1 guide lower flange
Back to step 6) cheek for
transitional operation.
{or Tension lever replacement}
Damage at No.8 guide flange
Back to step 5) No.9 guide lever check or
1) ACE head assembly coarse adjustment.
(Pinch lever, No.9 lever,
Capstan motor replacement)
4. Check step 2 and 3 if no good,
replace S slider assy or tension
lever.
ACE height adjusting screw
ACE head
Tilt adjusting screw
ACE head position adjusting slit __
CQ
(Insert a slot-type screwdriver.)
AGE head positon'screw
osition
9) up/
sty.
.
'
a
Azimuth adjusting screw
Damage at guide roller section
signal
nment
ase to
Back to step 3) linearity adjustment.
(or Slider assembly replacement)
video
1
the
* VIR
applied
SP mode
only, Use
Frame advance mode
Damage at No.8 guide flange
eon
3 MHz (A ch) video signal (SP
ee
Mode) instead of 3 MHz video
pe
is
signal (LP mode).
Back to step 3) linearity adjustment.
2-38
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