Sanyo M1110 - Adjustments; General Remarks and Equipment; Auto Shut-Off Mechanism Adjustment; Tape Speed Adjustment

ADJUSTMENTS
GENERAL REMARKS
e Before adjustment, wipe the tape contacting surfaces clean
as well as the contacting surfaces of the driving parts with a
_ soft cloth soaked in alcohol.
Trouble may occur because of oil and grease stains.
e Carefully handle the belt because grease easily attaches to
it. Then, check the used rubber parts. If the rubber has dete-
riorated or is scratched, replace the parts with a new one.
EQUIPMENT REQUIRED
@ VIVM -
@ Frequency Counter
e Dummy.Load (80 )
e Test Tapes
* 8kHz Test Tape (Example: TEAC MTT- 111) for Tine
Speed Adjustment
* 8kHz Test Tape (Example: TEAC MTT-113C) for Head
Azimuth Adjustment |
e DC Constant-voltage Regulator
e Alignment Too!
NOTE:
Supply 6V DC to the Ext. Power Jack from the constant-
voitage regulator at the adjustment.
AUTO SHUT-OFF MECHANISM ADJUSTMENT
1. When the unit is set in the playback mode, the Shut-off Lever
reciprocates according to the rotations of the Take- up Idler
and Take-up Reel.
2. Set the unit in the playback mode with the power supply and
slowly turn the Flywheel clockwise until the Shut-off Lever
comes closest to the Spring.
3. Check that the Spring touches the Rewind Arm, and that the
clearance of 0 ~ O.5mm remains between the Shut- off
Lever and Spring as illustrated.
Ed _ |O|
O% | 0 ~ 0.5mm
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Shut-off Lever
Rewind
Arm
;
Spring
“O us
4. If the specified clearance is not obtained, adjust the clear-
ance by bending the Spring.
NOTE:
If the clearance is not adjusted correctly, the following symp-
toms can occur:
A. When the clearance is more than 0.6mm;
* When the Rewind button is released to return the unit
from the review mode to the playback mode, the unit may
shut off automatically.
B. When the Shut-off Lever pushes the Spring while
reciprocating;
* When the tape has reached its ad with the unit in the
playback mode, the unit may not. shut off automatically.
TAPE SPEED ADJUSTMENT
1. Remove the battery compartment lid and connect a frequen-
_cy counter to the earphone jack as illustrated. —
Then, insert a 3kHz test tape (Example: TEAC MTT-111) into
the cassette compartment.
Frequency Counter
3kHz [+ 3%]
Potentiometer (P101) c
for Tape Speed Adjustment
2. While playing back the test tape, adjust the tape speed by
turning the potentiometer (P101) on the P.C.Board until the x
frequency counter reads 3kHz (+ 3%).