Sony DSR-300 Service Manual page 204

4-22. REPLACEMENT OF PINCH
ARM ASSEMBLY
Reel table position: Standard cassette position
Mode: Unthreading end
Removal
1. Remove one screw shown in the figure, and
remove the prism holder and prism.
2. Check that the S reel table and T reel table are at
the standard cassette position, and remove the
two screws shown in the figure, and remove the
TG-1/TG-8 base assembly.
Note: When removing the TG-1/TG-8 base
assembly, hold the base instead of the
guide.
3. Remove the stopper washer, and remove the
pinch arm assembly and torsion coil spring
(pinch).
Attachment
4. Set the new pinch arm assembly between the
cassette reference pin and TG-7 arm assembly,
and attach to the unit with the torsion coil spring
(pinch) using the stopper washer.
Note: When attaching, never touch the
pinch roller.
5. Attach the parts removed in the reverse order of
steps 1 to 3.
6. Rotate the No. 1 gear in the clockwise and
counterclockwise direction, and check that the
pinch arm moves smoothly.
7. Perform TG-1/TG-8 tape guide height check/
adjustment. (Refer to Section 4-37.)
8. Perform tape path check. (Refer to Section 5-3.)
9. Perform tracking adjustment.
(Refer to Sections 5-4 to 5-7.)
4-30
Prism holder
Screw
Prism
Pinch roller
Pinch arm assembly
No. 1 gear
Torsion coil spring
(Pinch)
Cassette
Mode slider
reference pin
TG-1/TG-8 base assembly
Screw
Stopper washer
Long hole
TG-7 arm
assembly
DSR-300/P(E)/V1