Sanyo M7790K - Page 5

MECHANICAL ADJUSTMENTS Ccontinuea)
3. AMSS Switch
This Switch is turned on by the Cue/Review Switch Lever
when the unit is set in the cue or review mode by pressing
the F.FWD or Rewind button in the playback mode. Then, the
AMSS circuit is functioning.
* Set the unit in the stop mode and check that the
clearance between the switch contacts is 0.2 ~ 0.3mm
with the AMSS Swtich in contact with the Cue/Review
Switch Lever as illustrated.
Screw
AMSS Switch
Cue/Review Switch Lever
Switch Adjustment
Loosen the screws fastening each switch and move the
switches to the specified positions if position adjustments are
required.
After the adjustment, tighten the screws and secure the
switches with paint or glue.
TAKE-UP TORQUE
1. Insert a cassette-type torquemeter (100g-cm) into the
cassette compartment and set the unit in the playback
mode. Then, check that the take-up torque is 30 ~ 65g-cm.
Take-up Torque
30 ~ 65g-cm
Cassette-type Torquemeter
2. If not, replace the Friction Assembly with a new one.
F.FWD AND REWIND TORQUES
1. Insert a cassette-type torquemeter (160g-cm) into the
cassette compartment and measure the fast forward and
rewind torque. Check that each torque is 55 ~ 180g-cm.
—5—
Rewind Torque
2 = 55 ~ 180g-cm
Fast Forward Torque
2. If not, replace the Friction Assembly with a new one.
AMSS SOLENOID ADJUSTMENT
AMSS (Automatic Music Select System) detects a silent space
(unrecorded portion) between each music on a musictape and
automatically plays back a desired music from the start.
The unrecorded portion should last for more than approximately
4 seconds.
It may not operate correctly in the following cases:
When the recorded sound is often interrupted as in a speech
tape.
When the silent space does not last long enough (less than 4
seconds).
When there is an appreciable noise in the silent space
between two adjacent programs.
When the unit is placed on a television set, AMSS may not
operaie correctiy due to adverse effect of the TV signal. In
this case, put the unit away from the television set.
If AMSS Solenoid is not correctly positioned, AMSS Switch does
not function correctly, F.FWD or Rewind button is released while
AMSS is working, or a button may not be locked. In this case,
perform the adjustment as follows:
1. Remove the Mechanism Chassis from the unit by following
its removal instructions.
2. Loosen the screw fastening the Solenoid and adjust the
Solenoid by moving it in the direction of the arrow, so that the
Plunger Lever is tightly attached to the two absorption
surfaces of the Solenoid as illustrated.
Screw
Solenoid
Plunger Lever
No Clearance