Fostex G24S Service Manual page 12

4.2.3. Pinch Roller Pressure
Pinch roller pressure is supplied by PINCH ROLLER SPRING © and SOLENOID, C
1) First, loosen two screws A and B to secure that the SOLENOID, C @ is at free position.
2) Turn on the power of G24S and secure the left or right tension (shut off) arm in ON posi ­
tion (tension arm raised) without loading a tape on the transport.
3) Attach a suitable spring scale to the pinch roller shaft with a loop of twine, (shown in
Fig. 4.3)
4) Put the G24S in the PLAY mode, and positioning the scale as illustrated in Fig. 4.3, slowly
draw it in direction opposite the capstan until the pinch roller stops rotating.
5) The spring scale should indicate 2.5 ~ 3.0kg (5.5 ~ 6.6 lbs).
6) If the reading is off specification, loosen the screw C and move the BRACKET, SPRING
(3) in direction of arrow shown in Fig. 4.4.
7) Turn off the power of G24S and rotate the CA ASSY, LOADING @ by hand until the
CA ASSY, LOADING (4) and AR ASSY, JOINT, GA © reach the point within the
arrow marked area as shown in Fig. 4.4.
8) At this condition, adjust the position of SOLENOID, C @ so that there is no gap X
produced between the RUBBER @ and SOLENOID, C@.
Then, holding both SOLENOID CORE© and SOLENOID, C@and push the SOLENOID
CORE © slightly to the arrow direction to eliminate the further play of the SOLENOID
CORE © maintaining the engagement of CA ASSY, LOADING @ and AR ASSY,
JOINT GA© and then tighten the two screws A and B.