JVC CD Receiver KD-G417 User manual

SERVICE MANUAL
COPYRIGHT © 2005 Victor Company of Japan, Limited No.MA202
2005/7
CD RECEIVER
MA20220057
KD-G417
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
Area suffix
EE -------- Russian Federation

1-2 (No.MA202)
SPECIFICATION
Design and specifications are subject to change without notice.
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 Ωto 8 Ωallowance)
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 kΩload (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)

(No.MA202)1-7
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.
Fig.1
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 aon the left side, two joints bon the right side and
joint con 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.
Fig.2
3.1.3 Removing the front chassis assembly
(See Fig.3)
• Remove the front panel assembly and bottom cover.
(1) Remove the two screws Aon the both sides of the main
body.
(2) Release the two joints dand two joints eon the both sides
of the main body, then remove the front chassis assembly
toward the front.
Fig.3
Front panel assembly
Detach button
Bottom cover
Joint b
Joint b
Joint c
Joint a
Joint a
Joint d
Front chassis assembly
A
Joint e
Joint d Joint e

1-8 (No.MA202)
3.1.4 Removing the side panel
(See Fig.4)
Reference:
Remove the front panel assembly as required.
(1) Remove the screw Band two screws Cattaching the side
panel on the left side of the main body.
(2) Remove the side panel from the main body.
Fig.4
3.1.5 Removing the rear bracket
(See Fig.5)
• Remove the bottom cover.
(1) Remove the three screws D, one screw Eand two screws
Fattaching 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 Dattaching the rear bracket on
the back side of the main body. (See Fig.5.)
(2) Remove the two screws Gattaching the main board. (See
Fig.6.)
(3) Disconnect the connector CN501 on the main board from
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".)
Fig.5
Fig.6
Side panel
CBC
DD
E
Rear bracket FF
Main board
G
G
CN501
Rear bracket

(No.MA202)1-9
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 Hattaching the CD mechanism
assembly on the top chassis.
(2) Take out the CD mechanism assembly.
Fig.7
3.1.8 Removing the switch board
(See Figs.8 to 10)
• Remove the front panel assembly.
(1) Remove the five screws Jon the back side of the front pan-
el assembly. (See Fig.8.)
(2) Release the twelve joints fand remove the rear cover. (See
Fig.9.)
(3) Release the joint gand 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.
Fig.8
Fig.9
Fig.10
H
H
CD mechanism assembly Top chassis
J
J
J
Joints f
Joints f
Joints fJoints f
Rear cover
Switch board Joint g
Front panel assembly

1-10 (No.MA202)
3.2 CD Mechanism Assembly
3.2.1 Removing the top cover
(See Figs.1 and 2)
(1) Remove the two screws Aon 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.
Fig.1
Fig.2
A
A
A
Joints a
Top cover
Joints a
Top cover

(No.MA202)1-11
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 in-
struction may cause damage of the pickup.
(1) Remove the screw Bfixing 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.
Fig.3
Fig.4
Fig.5
B
Connector board
Pickup
Short-circuit point
Joints b
Wires
Pickup
Short-circuit point
(Soldering)
Flexible wire
B
Flexible wire
Connector board
Frame

1-12 (No.MA202)
3.2.3 Removing the DET switch
(See Figs.6 and 7)
(1) Extend the two tabs cof the feed sw. holder and pull out
the switch.
(2) Unsolder the DET switch wire if necessary.
Fig.6
Fig.7
Connector
board
DET switch
Pickup
DET switch Tab c
Tab c
DET switch wire
Feed sw. holder

(No.MA202)1-13
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 dif-
ferent. 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.
Fig.8
Fig.9
Suspension spring (L)
Suspension spring (L)
Suspension spring (R)
Suspension spring (R)
Chassis unit
Frame
Chassis unit
Frame
Shafts
Shaft
Dampe
r
Damper
Damper

1-14 (No.MA202)
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.
Fig.10
Fig.11
Clamper arm
spring
Chassis rivet
assembly
Joint d
Joint d Clamper assembly
Clamper arm spring
Clamper
assembly
Joint d
Joint d
Chassis rivet assembly