PIONEER CX680
Service Manual

CX-680

Detection arm

- Clamp operation
When the rack lever in contact with the detection lever is driven by the loading motor, the rack lever engages with the gear to move the clamp UP lever, mechanical lock arm, and mechanical lock lever toward the directions indicated with arrows in Fig. 22. The clamper arm, that was lifted by the clamp UP lever, comes down to clamp disc. The clamp UP lever and mechanical lock lever L move the loading arm apart from the disc. When the mechanical lock lever has moved to a specified position, the system turns the clamp switch to ON to stop the loading motor.
Mechanical lock lever L Detection lever Rack lever Clamp UP lever Loading motor Mechanical lock arm Clamp switch Mechanical lock lever R

Fig. 22

- Mechanical locking
During ejection, two mechanical lock levers slide into the teeth of the frame to resist the mechanical spring and push down the front of floating (chassis) unit. Thus, the system detects the height of disc insertion. During playback, the floating unit is released when the mechanical lock levers move and disengage from the frame teeth.

- Ejection
Disc is ejected by the loading motor rotating in the inverse direction from loading to activate mechanical locking, release clamping, and press the roller. The system stops the loading motor when both phototransistors P2 and P3 in the rear of the rubber roller detect. (Voltage : L)

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