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RC-550L/LB
Adjustment of Cassette Mechanism
Auto Stop Mechanism
If the auto stop mechanism
is defective, check as follows.
1. When the solenoid does not suck the plunger:
a. The coil of the solenoid may be opencircuited.
The resistance value of solenoid should be approxi-
mately 50Q.
. The diode (D113) may be open- or shortcircuited.
The transistors (X105~107) may be defective.
. The connecting wires may be opencircuited.
If the solenoid is lack of suction ability, bend the part
A of adjusting arm to the B direction as shown in Fig.
23.
2. When
the
auto
stop
mechanism
does
not
function,
though the solenoid has sucked the plunger.
a. The motor may be lack of torque. If it is, change it.
b. The capstan
belt may
be lack of tension.
If it is,
change it.
c. FF and rewind torque may be extremely high.
If it is, adjust as following the "Adjustment of FF &
Rewind Torque".
d. The auto lever may be deformed. If it is, change it.
eoa0c
Solenoid
Plunger
Flywheel
Fig. 23
Thrust of Flywheel
The clearance between the top of flywheel shaft and the
flywheel bracket should be within 0.2 to 0.4mm. If the
clearance is beyond the limits, adjust the screw for normal
value.
Note:
After adjustment, fix the screw with lock adhesive.
Adjusting Screw
Pause Mechanism
1.
In the playback mode, check to see that the pinch roller
separates from -the capstan shaft and stops turning and
then the reel disk stops turning and the tape stops when
the PAUSE
button has been pressed. Check to see that
the tape restarts and is normally transported when the
PAUSE button is released.
. If the timing of pause mechanism
is out of order: the
takeup
reel disk stops first and then the pinch roller
stops, so that the tape
is projected from the cassette
half.
Adjust the timing by bending the part (C) of pinch arm
lever to the A direction.
. The space between the pinch roller and the capstan shaft
should
be more than 0.5mm.
If it is less than 0.5mm
bend the part (C) to the A direction, and if it is excess
bend the part (C) to B direction.
ra ie
:
a
@
Fig. 25
more than 0.5mm
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