Rotary Switch, Cam Relay Gear, Change Gear Assembly, Timing Belt - Sony DCR-TRV725E Service Manual

4-16. Rotary Switch, Cam Relay Gear, Change Gear Assembly, Timing Belt

Before replacing the timing belt, remove the guide rail T2 and capstan motor. (Refer to 4-4.)
1. Removal procedure
1) Remove the LS chassis block assembly. (Refer to 4-10.)
2) Remove the guide lock plate (T), pinch pressure assembly and
eject arm. (Refer to 4-15.)
3) Remove the cam relay gear 1.
4) Remove the timing belt 2.
Remove the HLW cut (0.98 × 3 × 0.25) 3 and change gear
5)
assembly 4.
6) Remove the four solderings 5 and remove the FP-299 flexible
wiring board 6.
7) Push up the dowel of the rotary switch 7 from the bottom of
the mechanism chassis assembly and remove the rotary switch
in the direction of the arrow.
Clearance must exist between
the claw of the rotary switch and
the belt.
3 HLW cut
(0.98 × 3 × 0.25)
Belt must be completely
free from twist or stain
when it is installed
5 Remove the
four solderings
Bend here at right angles.
6 FP-299 flexible
board
Align the holes.
7 Remove the rotary switch
in the direction of the arrow.
4 Change gear
assembly
Fig. 4-16.
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2. Attachment procedure
1) Insert the dowel of the rotary switch 7 into the hole on the
mechanism chassis assembly and attach the rotary switch
clockwise.
2) Align the FP-299 flexible wiring board 6 with the reference
hole on the mechanism chassis and solder the flexible wiring
board to the rotary switch 7 (at four locations).
Attach the change gear assembly 4 with the HLC cut (0.98 ×
3)
3 × 0.25)3.
4) Attach the timing belt 2.
Note: There must be a clearance between the rotary switch 7 and
timing belt 2.
5) Attach the cam relay gear 1.
The in-phase markings of the rotary switch 7, cam relay gear
(2) and cam relay gear (1) must be aligned.
6) Attach the guide lock plate (T), pinch pressure assembly and
eject arm. (Refer to 4-15.)
7) Attach the LS chassis block assembly to the mechanical chassis.
(Refer to 4-10.)
8) Clean the shaft of the capstan motor. (Refer to 2-2.)
Attachment direction
The ribs must be facing upward.
Dowel
1 Cam relay gear (2)
SETTING THE GEAR POSITION
Hole of mechanism chassis
Rotary switch
2 Timing
belt
When attaching it, coat the hatched
Cam relay gear (2)
Cam relay
gear (1)
Cam relay gear (1)
portion with grease.