JVC KDG-417 Service manual

SERVICE MANUAL

CD RECEIVER

MA20220057

KD-G417

Area suffix

EE -------- Russian Federation

Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)

TABLE OF CONTENTS

1 PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25

5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-26

No.MA202

2005/7

SPECIFICATION

AUDIO AMPLIFIER SECTION

Maximum Power Output Front 50 W per channel

Rear 50 W per channel

Continuous Power Output (RMS) Front 19 W per channel into 4 Ω, 40 Hz to 20 000 Hz at no more

than 0.8% total harmonic distortion.

Rear 19 W per channel into 4 Ω, 40 Hz to 20 000 Hz at no more

than 0.8% total harmonic distortion.

Load Impedance 4 Ω (4 Ω to 8 Ω allowance)

Tone Control Range Bass ±10 dB at 100 Hz

Treble ±10 dB at 10 kHz

Frequency Response 40 Hz to 20 000 Hz

Signal-to-Noise Ratio 70 dB

Line-Out Level/Impedance 2.5 V/20 kΩ load (full scale) Output Impedance 1 kΩ

TUNER SECTION

Frequency Range FM1/FM2 87.5 MHz to 108.0 MHz

FM3 65.00 MHz to 74.00 MHz

AM (MW) 522 kHz to 1 620 kHz

(LW) 144 kHz to 279 kHz

FM Tuner Usable Sensitivity 11.3 dBf (1.0 µV/75 Ω)

50 dB Quieting Sensitivity 16.3 dBf (1.8 µV/75 Ω)

Alternate Channel Selectivity (400 kHz) 65 dB

Frequency Response 40 Hz to 15 000 Hz

Stereo Separation 30 dB

Capture Ratio 1.5 dB

MW Tuner Sensitivity 20 µV

Selectivity 35 dB

LW Tuner Sensitivity 50 µV

CD PLAYER SECTION

Type Compact disc player

Signal Detection System Non-contact optical pickup (semiconductor laser)

Number of Channels 2 channels (stereo)

Frequency Response 5 Hz to 20 000 Hz

Dynamic Range 96 dB

Signal-to-Noise Ratio 98 dB

Wow and Flutter Less than measurable limit

MP3 Decoding Format MPEG1/2 Audio Layer 3

Max. Bit Rate: 320 kbps

WMA (Windows Media Audio) Decoding Format Max. Bit Rate: 192 kbps

GENERAL

Power Requirement Operating Voltage DC 14.4 V (11 V to 16 V allowance)

Grounding System Negative ground

Allowable Operating Temperature 0°C to +40°C Dimensions (W × H × D) Installation Size (approx.) 182 mm × 52 mm × 150 mm

Panel Size (approx.) 188 mm × 58 mm × 11 mm

Mass (approx.) 1.3 kg (excluding accessories)

Design and specifications are subject to change without notice.

1-2 (No.MA202)

SECTION 3

DISASSEMBLY

3.1 Main body section

3.1.1 Removing the front panel assembly (See Fig.1)

(1) Push the detach button in the lower right part of the front

panel assembly and remove the front panel assembly.

3.1.2 Removing the bottom cover (See Fig.2)

(1) Turn the main body up side down. (2) Insert a screwdriver under the joints to release the two

joints a on the left side, two joints b on the right side and joint c on the back side of the main body, then remove the bottom cover from the main body.

Note:

When releasing the joints using a screwdriver, do not damage the main board.

Front panel assembly

Joint a

Detach button

Fig.1

Bottom cover

Joint b

3.1.3 Removing the front chassis assembly (See Fig.3)

• Remove the front panel assembly and bottom cover.

(1) Remove the two screws A on the both sides of the main

body.

(2) Release the two joints d and two joints e on the both sides

of the main body, then remove the front chassis assembly toward the front.

Joint a

Joint c

Fig.2

Joint d Joint e

Joint d

Front chassis assembly

Fig.3

Joint e

Joint b

(No.MA202)1-7

3.1.4 Removing the side panel (See Fig.4)

Reference:

Remove the front panel assembly as required. (1) Remove the screw B and two screws C attaching the side

panel on the left side of the main body.

(2) Remove the side panel from the main body.

3.1.5 Removing the rear bracket (See Fig.5)

• Remove the bottom cover.

(1) Remove the three screws D, one screw E and two screws

F attaching the rear bracket on the back side of the main body.

(2) Remove the rear bracket.

3.1.6 Removing the main board (See Figs.5 and 6)

• Remove the front panel assembly, bottom cover and side pan-

el.

Reference:

Remove the front chassis assembly as required. (1) Remove the three screws D attaching the rear bracket on

the back side of the main body. (See Fig.5.)

(2) Remove the two screws G attaching the main board. (See

Fig.6.)

(3) Disconnect the connector CN501

the main body and take out the main board with the rear bracket. (See Fig.6.)

Reference:

Remove the rear bracket from the main body as required. (See "3.1.5 Removing the rear bracket".)

on the main board from

Side panel

Rear bracket

CN501

Fig.4

Fig.5

Main board

1-8 (No.MA202)

Rear bracket

Fig.6

3.1.7 Removing the CD mechanism assembly

(See Fig. 7)

• Remove the front panel assembly, bottom cover, side panel,

rear bracket and main board.

Reference:

Remove the front chassis assembly as required. (1) Remove the three screws H attaching the CD mechanism

assembly on the top chassis.

(2) Take out the CD mechanism assembly.

3.1.8 Removing the switch board

(See Figs.8 to 10)

• Remove the front panel assembly.

(1) Remove the five screws J on the back side of the front pan-

el assembly. (See Fig.8.)

(2) Release the twelve joints f and remove the rear cover. (See

Fig.9.)

(3) Release the joint g and take out the switch board from the

front panel assembly. (See Fig.10.)

Note:

When removing the rear cover assembly and switch board, be careful not to lose the spring.

CD mechanism assembly

Rear cover

Top chassis

Fig.7

Fig.8

Joints f

Joints f Joints f

Switch board

Joints f

Fig.9

Front panel assembly

Joint g

Fig.10

(No.MA202)1-9

3.2 CD Mechanism Assembly

3.2.1 Removing the top cover (See Figs.1 and 2)

(1) Remove the two screws A on the both side of the body. (2) Lift the front side of the top cover and move the top cover

backward to release the two joints a.

Top cover

Joints a

Fig.1

Fig.2

Top cover

1-10 (No.MA202)

3.2.2 Removing the connector board

(See Figs.3 to 5)

CAUTION:

Before disconnecting the flexible wire from the pickup, solder the short-circuit point on the pickup. No observance of this instruction may cause damage of the pickup. (1) Remove the screw B fixing the connector board. (2) Solder the short-circuit point on the connector board. (3) Disconnect the flexible wire from the pickup. (4) Move the connector board in the direction of the arrow to

release the two joints b.

(5) Unsolder the wire on the connector board if necessary.

CAUTION:

Unsolder the short-circuit point after reassembling.

Connector board

Flexible wire

Wires

Joints b

Short-circuit point

Fig.3

Short-circuit point

(Soldering)

Pickup

Flexible wire

Frame

Pickup

Fig.4

Connector board

Fig.5

(No.MA202)1-11

3.2.3 Removing the DET switch (See Figs.6 and 7)

(1) Extend the two tabs c of the feed sw. holder and pull out

the switch.

(2) Unsolder the DET switch wire if necessary.

Connector board

DET switch

Pickup

Fig.6

Tab c

DET switch wire

Tab c

Feed sw. holder

Fig.7

1-12 (No.MA202)

3.2.4 Removing the chassis unit

(See Figs.8 and 9)

• Prior to performing the following procedure, remove the top

cover and connector board. (1) Remove the two suspension springs (L) and (R) attaching

the chassis unit to the frame.

CAUTION:

• The shape of the suspension spring (L) and (R) are different. Handle them with care.

• When reassembling, make sure that the three shafts on the underside of the chassis unit are inserted to the dampers certainly.

Suspension spring (R)

Chassis unit

Suspension spring (L)

Frame

Suspension spring (R)

Chassis unit

Shafts

Damper

Suspension spring (L)

Fig.8

Shaft

Dampe

Frame

Fig.9

(No.MA202)1-13

3.2.5 Removing the clamper assembly (See Figs.10 and 11)

• Prior to performing the following procedure, remove the top

cover. (1) Remove the clamper arm spring. (2) Move the clamper assembly in the direction of the arrow to

release the two joints d.

Clamper arm spring

Joint d

Clamper assembly

Fig.10

Clamper arm spring

Chassis rivet assembly

Joint d

Clamper assembly

Chassis rivet assembly

Fig.11

Joint d

1-14 (No.MA202)

3.2.6 Removing the loading / feed motor assembly

(See Figs.12 and 13)

• Prior to performing the following procedure, remove the top

cover, connector board and chassis unit. (1) Remove the screw C and move the loading / feed motor

assembly in the direction of the arrow to remove it from the chassis rivet assembly.

(2) Disconnect the wire from the loading / feed motor assembly

if necessary.

CAUTION:

When reassembling, connect the wire from the loading / feed motor assembly to the flame as shown in Fig.12.

Loading / feed motor assembly

Fig.12

Loading / feed motor assembly

Fig.13

(No.MA202)1-15

3.2.7 Removing the pickup unit (See Figs.14 to 18)

• Prior to performing the following procedure, remove the top

cover, connector board and chassis unit. (1) Remove the screw D and pull out the pu. shaft holder from

the pu. shaft. (2) Remove the screw E attaching the feed sw. holder. (3) Move the part e of the pickup unit upward with the pu. shaft

and the feed sw. holder, then release the joint f of the feed

sw. holder in the direction of the arrow. The joint g of the

pickup unit and the feed rack is released, and the feed sw.

holder comes off. (4) Remove the pu. shaft from the pickup unit. (5) Remove the screw F attaching the feed rack to the pickup

unit.

3.2.8 Reattaching the pickup unit (See Figs.14 to 17)

(1) Reattach the feed rack to the pickup unit using the screw F. (2) Reattach the feed sw. holder to the feed rack while setting

the joint g to the slot of the feed rack and setting the part f of the feed rack to the switch of the feed sw. holder correctly.

(3) As the feed sw. holder is temporarily attached to the pickup

unit, set to the gear of the joint g and to the bending part of the chassis (joint h) at a time.

CAUTION:

Make sure that the part i on the underside of the feed rack is certainly inserted to the slot j of the change lock

lever. (4) Reattach the feed sw. holder using the screw E. (5) Reattach the pu. shaft to the pickup unit. Reattach the pu.

shaft holder to the pu. shaft using the screw D.

Feed sw. holder

Joint f

Joint g

Feed sw. holder

Part e

Feed rack

Part i

Pickup unit

Slot j

Fig.15

Pu. shaft

Pickup unit

Joint f

Joint h

Fig.16

Feed rack

Pickup unit

Feed sw. holder

Pu. shaft holder

Pu. shaft

Pu. shaft holder

1-16 (No.MA202)

Pickup unit

Fig.14

Part e

Joint g

Feed rack

Fig.17

Pickup unit

Joint g

Joint f

Feed sw. holder

Fig.18

3.2.9 Removing the trigger arm

(See Figs.19 and 20)

• Prior to performing the following procedure, remove the top cover, connector board and clamper unit. (1) Turn the trigger arm in the direction of the arrow to release

the joint k and pull out upward.

CAUTION:

When reassembling, insert the part m and n of the trigger arm into the part p and q at the slot of the chassis rivet assembly respectively and join the joint k at a time.

Chassis rivet assembly

Trigger arm

Chassis rivet assembly

Joint k

Trigger arm

Fig.19

Part p

Part q

Part m

Part n

3.2.10 Removing the top plate assembly

(See Fig.21)

• Prior to performing the following procedure, remove the top cover, connector board, chassis unit, and clamper assembly. (1) Remove the screw H. (2) Move the top plate assembly in the direction of the arrow to

release the two joints r.

(3) Unsolder the wire marked s if necessary.

Fig.20

Top plate assembly

Joints

Fig.21

(No.MA202)1-17

3.2.11 Removing the mode sw. / select lock arm (See Figs.22 and 23)

• Prior to performing the following procedure, remove the top

plate assembly. (1) Bring up the mode sw. to release from the link plate (joint t)

and turn in the direction of the arrow to release the joint u. (2) Unsolder the wire of the mode sw. marked s if necessary. (3) Turn the select lock arm in the direction of the arrow to re-

lease the two joints v. (4) The select lock arm spring comes off the select lock arm at

the same time.

Top plate

Link plate

Joint u

Joint t

Fig.22

Select lock arm

Mode sw.

Select lock arm

Top plate

Hook w

Select lock arm spring

Link plate

Joints v

Fig.23

1-18 (No.MA202)

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