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CHECKING
PROCEDURE
OF
PINCH
ROLLER
PRESSURE
<Capstan
;
shaft
-Pinch roller
Pinch roller Jever drive shaft
Figure 10.
1) Remove the cassette housing. Hold the cassette down
switch with PVC tape.
2) Depress the play button.
3) Bring the pinch roller apart from the capstan shaft by
pulling it in the direction of (A).
4) Permitting the pinch roller to return
(move in the
direction of (B)), measure force which the pinch roller
exerts when it just contacts the capstan shaft. (Pull the
pinch roller lever drive shaft with a spring balance to
measure the force.)
5) Check that the reading is in the range of 1900 ~ 2740g-
cm.
CHECKING
PROCEDURE
AND
ADJUSTMENT
OF
CAPSTAN SHAFT-PINCH ROLLER CLEARANCE DUR-
ING PAUSE
IN RECORD MODE
@ Checking Procedure
1) Remove the cassette housing.
2) Hold the cassette down switch with PVC tape.
3) Depress the record button.
4) Depress the pause button.
5) In
this condition,
check
by inspection
that the
clearance between the pinch roller and capstan shaft
is 0.7 ~ 1.2mm.
@ Adjustment
1) If the pinch roller-capstan shaft clearance is not as
specified, loosen the screw (XBPSD30P06JSo) which
fastens shifters
A and B and make adjustment.
2) After adjustment,
apply lock paint to the screw
(XBPSD30P06JSo).
Shifter B
Screw (XBPSD30P06JS0}
Shifter A
Co
ace)
=
>
Capstan shaft
Pinch roller
0.7 ~ 1.2mm
Figure 11.
CHECKING PROCEDURE OF REEL IDLER PRESSURE
How to use tension gauge
Figure 12.
1) Remove the cassette housing.
2) Move the reel idler toward the center (see Figure 12).
3) Separate the reel idler from the reel motor pulley by
pushing the reel idler with a tension gauge
in the
direction of (A) (see Figure 12).
4) Permitting the reel idler to return in the direction of (B)
slowly, check that the tension gauge reads 120 ~ 170g
when the reel idler just comes into contact with the reel
motor.
CHECKING
PROCEDURE
AND
ADJUSTMENT
OF
TENSION POLE POSITION
@ Checking Procedure
1) Remove the cassette housing.
2) Load a video cassette tape and depress the play
button.
3) Loading starts when pole bases A and B draw tape
out of the cassette and the tension pole moves to the
left simultaneously. Check the position of the tension
pole in this condition.
4) Check by inspection that the center of the tension
pole is 0.5 — 1.0mm on the left of the SI roller's
center at around the end of tape (E-180).
5) Check that the video tape is neither curled at the
flange of the SI roller nor runs over the flange.
6) Check that the tension band is released from the reel
disk during video search.
Video tape
I roller
ension pok
Tension arm
foe
a
Sw ply reel disk
Tession band
L\
RQ
Cee
Video cassette
tape
Figure 13.
Figure 14.
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