Pinch Roller Pressure Measurement; Winding Torque Measurement In Each Mode - Akai GX-A5 Service Manual

7-1, PINCH ROLLER PRESSURE MEASUREMENT
250 to 350g-cm
SPRING GAUGE.
CAPSTAN
PINCH ROLLER SPRING
PINCH ROLLER PINCH ROLLER LEVEL
Fig. 7-1
Put in PLAY mode. Push pinch roller arm down
with the spring gauge, push the pinch Roller 1 to 2
mm from the Capstan and release slowly. Read the
spring gauge at the moment the pinch roller touches
the capstan and begins to rotate. Specified contact
pressure measurement of 250 to 350 grm. If there is
no measurement obtained, Adjust or Replace the
pinch Roller spring.
7-2. WINDING TORQUE MEASUREMENT IN EACH MODE
CASSETTE TORQUE METER
Insert a cassette torque meter (AJ-751179) and
measure in each mode. For Fast Forward and Re-
wind, measure at the end of the tape when the tape
has stopped running.
PLAY mode
Take up Torque: 25 to 60 grm-cm
Back tension Torque: 2 to 5 grm-cm
FAST FORWARD, REWIND mode
Take up Torque: 70 to 120 grm-cm
rm SERVICE MANUAL GX-A 5 [Xs
10