JVC CD receiver KDR446 - how to disassemble the mechanism

 Applicable to models: KD-R440J, KD-R440JW, KD-R441E, KD-R441EN, KD-R441EU, KD-R441EY, KD-R442E, KD-R442EN, KD-R442EY, KD-R443E, KD-R443EN, KD-R443EY, KD-R444UI, KD-R445U, KD-R445UN, KD-R446EU, KD-R446U, KD-R446UN, KD-R446UP, KD-R446UT, KD-R447EE, KD-R449E, KD-R449EE, KD-R449UR, KD-R540J, KD-R541E, KD-R541EN, KD-R541EY, KD-R547EE

DETACHABLE PANEL

Power Output: 50 W per channel

Continuous Power Output (RMS): 20 W per channel into 4Ω, 40 Hz to 20 000 Hz at less than 1% total harmonic distortion.

Handling the traverse unit (optical pickup)
(1) Do not subject the traverse unit (optical pickup) to strong shocks, as it is a sensitive, complex unit.
(2) Cut off the shorted part of the flexible cable using nippers, etc. after replacing the optical pickup. For specific details, refer to the replacement procedure in the text. Remove the anti-static pin when replacing the traverse unit. Be careful not to take too long a time when attaching it to the connector.
(3) Handle the flexible cable carefully as it may break when subjected to strong force.
(4) I t is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it.

Identifying the CD Mechanism

This unit is equipped with one of the two CD mechanism types below.
• FLM-HC3-1D
• FLM-HC5-1D
Before sending the mechanism for repair, please check the following and refer to the corresponding materials.

DISASSEMBLY

Main body (Used model: KD-R441E)

Removing the Bottom chassis (See Fig.1)
(1) Disengage the 7 hooks a engaging the Bottom chassis.
(2) Slide the Bottom chassis backward to remove it.

Removing the Front chassis (See Fig.2)
(1) Disengage the 4 hooks b engaging both sides of the Front chassis.

Removing the Electric unit (See Fig.3, 4 and 5)
(1) Remove the 1 screw A attaching the Top chassis. (See Fig.3)

(2) Remove the 2 screws B attaching both sides of the Top chassis. (See Fig.4)

(3) Remove the 2 screws C and 1 clamp attaching the Electric unit. (See Fig.5)

(4) Disconnect the FFC wire connected to connector CN101 of the CD mechanism. (See Fig.6)

Removing the CD mechanism (See Fig.7)

(1) Remove the 2 screws D attaching the CD mechanism.

Removing the Switch unit (See Fig.8)
(1) Remove the Volume knob.
(2) Remove the 4 screws E attaching the Rear cover.
(3) Disengage the 12 hooks c engaging the Rear cover.

CD mechanism assembly section

Removing the Mecha control board
Removing the Mecha control board
(1) Solder the short land on the pickup. (See Fig. 1)

(2) Remove the 8 wires from the Mecha control board. (See Fig.2)

(3) Disconnect the flexible wire from the pickup connected to the connector CN102 on the Mecha control board. (See Fig.3)
(4) Remove the 2 screws A attaching the Mecha control board. (See Fig.3)

Removing the Traverse mechanism (See Fig.4, 5)
(1) Remove the 5 springs from the traverse mechanism. (See Fig.4)

(2) Remove the 3 screws B attaching the bottom frame assembly. (See Fig.5)
(3) Remove the 3 dumpers from the bottom frame assembly. (See Fig.5)

Removing the Pickup (See Fig.6, 7)
(1) Remove the 2 screws C attaching the feed bracket assembly. (See Fig.6)

(2) Remove the shaft from the TM base. (See Fig.7)
(3) Disengage the hook a on the pickup from the TM base. (See Fig.7)

Removing the Spindle motor (See Fig.8. 9)
(1) Remove the HC CL. Spring from the HC CL. base and the TM base, and then lift up the HC CL. base. (See Fig.8)

(2) Remove the HC CL. base from the holes on the TM base. (See Fig.9)

(3) Remove the 2 screws D attaching the spindle motor. (See Fig.10)

Removing the Loading motor
(1) Remove the roller arm assembly from the bottom frame assembly. (See Fig.11)

(2) Remove the 2 screws E attaching the loading motor assembly, and then remove the loading motor assembly in the direction of the arrow. (See Fig.12)