Sanyo MR-110 - Page 2

*“ Stop” Position
(1)
1.
(2)
Adjustment of Brake Mechanism
When the control is moved to “stop” from recording,
playback, or rapid winding, the brake is applied weakly to
takeup reel base aud strongly to supply reel base.
When the control is moved to “stop” from rewinding,
the brake is applied strongly to takeup reel and weakly to
supply reel. In the event the strength of brake pressure
works in reverse, it will cause slackening of recording tape
when the control is moved to “stop’. Figure 1 shows the
position of mechanism when the brake is applied.
Broke thor (8) teontacted
\, (0)
—___bever (10)
eft veal bose 12)
0S Ici
Shde base (113
Seveg 12)
interlocked
Ee Pinh button lever 413)
rl
fig. 1
The slide base (11) must be in contact with push button
levers (13) for rapid winding and rewinding. In case
there is an aperture between the slide base and push
button levers, adjust spring (12).
There should be an opening of 1-2mm between lever (10)
and slide base (11).
lever and slide base, either the brake shoe is worn out or it
has come off. The brake shoe (8) is
composed of hard pressed felt and it is designed to give
If there is no aperture between the
Check and replace.
satisfactory performance even when it is worn down to
0.5mm.
Note: Adjustment of brake on the takeup reel base side
is done by spring (9). This adjustment should be done
only after checking the points mentioned under 1 and 2.
There should be an opening of 1-2mm between lever (10)
and lever (7).
When the brake fails to apply properly if the rewinding
reel base is turned anti-clockwise, spring (4) must be
adjusted.
Note: Since the brake on the rewinding or supply reel
base is closely related with takeup reel side’s brake, check
the points mentioned under 1 and 2 also.
Adjustment of Pinch Roller Position
At ‘stop’ position, the pinch roller lever should be as
shown in figure 2, Since the movement of this pinch roller
lever (14) has much influence on the opening angle of pad,
utmost caution should be paid in making adjustment. To
adjust, control the adjusting nut (15).
Adjust the length of functioning bar (17) which links
playback button lever (16) and pinch roller lever (14).
After making the adjustment, remove the capstan sleeve, so
that the tape speed will become 4.75 cm/sec., and press the
playback button. There must be an aperture of 0.5-lmm
between pinch roller lever (14) and adjusting nut (15) at
this time.
To control the pressure of pinch roller, adjust spring (18).
For adjustment of pinch roller, refer the following para-
graphs.
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Adwst the aut
so thot these Iwo lines
ae porollel,
fig. 2
At d75emiec
In Normal Forwarding
(1)
(2)
In normal forwarding, it is most important that the record-
ing tape is transported at precise speed without slipping.
To insure this, the tape recorder is pre-adjusted. In case of
trouble, refer the following:
Adjustment of pressure of Pinch roller
The cause of slipping of the recording tape between the
capstan and the pinch roller may be traced to weak pressure
of the pinch roller.
The presure of the pinch roller should be 350+50g at 4.75
cm/sec. To determine the pressure, use spring gauge and
pull the pinch roller shaft, and gauge the pressure of the
pinch roller when it stops to rotate. In making this check,
do not load the recording tape.
Adjustment of back tension
To prevent wobbling or slackening of recording tape at
normal forwarding, tension is applied to the recording tape
This is
and adjustment is made
by applying slight brake to the supply recl base.
done by back tention lever (19),
by spring (20).
© Supply rect bese
Felt)
_> Back tension lever (29)
5: 7gr
Tession gouge
*Put the mechanism in FWD, place the reel on the left side
spindle and measure the end of thread with tension gauge
The strength at the
instant when the reel rotates in anti-clockwise direction is
by pulling in the direction of arrow.
determined as back tension.