Panasonic SG-5090 - Page 7

MECHANICAL ADJUSTMENT OF CASSETTE TAPE DECK
PRESSURE ROLLER ADJUSTMENT
1. Switch set to PLAY. (Do not insert cassette.)
2. Hook gauge to arm of pressure roller.
Pressure Roller
Capstan
. Pull pressure roller away from the capstan in the
direction of arrow 1 with spring gauge and slowly
permit the pressure roller to return toward capstan
inthe direction of arrow 2.
. Measure tension at time when pressure roller
makes contact with capstan (or when pressure
roller starts rotating.)
. The standard tension of pressure roller should be
250 ~ 380g.
. If pressure is not within these limits;
Clean the rubber roller and capstan with a soft cloth
moistened with alcohol or replace pressure spring.
TAKE-UP TORQUE ADJUSTMENT
f&ONM- *
Test Tape: QZZSRK-CT (Take-up Torque Meter)
. Insert test tape.
. Rewind the tape to its starting point.
. Switch set to PLAY.
. Read ‘®” mark of indicator on take-up side.
Indicator
CASSETTE
TORQUE METER
QZZSRK-CT
Torque Scale
5. Repeat PLAY-STOP several times and read the
average tension.
6. The standard take-up tension should be 30 ~ 70
g.cm. If take-up tension is not within these limits;
a) Clean main belt, take-up reel and all parts
which contact them with a cotton swab
moistened with alcohol, and/or
b) Switch set to “OFF”, remove main belt and
make sure that take-up reel and take-up clutch
are rotating smoothly.
c) Change take-up clutch tension by turning the
friction spring under reel table, and/or
d) Replace take-up clutch.
Friction Spring
Take-up Clutch Assembly
MOTOR PULLEY ADJUSTMENT
When replacing the motor, adjust the clearance
between motor and motor pulley as in figure below.
$¢-5090/(m)