JVC KDG-140-J, KDG-240-J, KDG-244-UI, KDG-245-U, KDG-245-UH Service manual
...
SERVICE MANUAL
CD RECEIVER
MA372<Rev.002>20085SERVICE MANUAL
KD-G140J, KD-G240J, KD-G244UI, KD-G245U, KD-G245UN,
KD-G245UT, KD-G245UH, KD-G248UF, KD-G341E,
KD-G341EX, KD-G341EY, KD-G341EU, KD-G342E,
KD-G342EX, KD-G342EY,KD-G342EU, KD-G343E, KD-G343EX,
KD-G343EY, KD-G343EU, KD-G347SEE, KD-G347BEE,
KD-G394UI, KD-G395U, KD-G395UN,KD-G395UT, KD-G395UH,
KD-G396U, KD-G396UN, KD-G396UT, KD-G396UH,
KD-G398UF,KD-G396SUI, KD-G299UR
only for
KD-G140/KD-G240
KD-G394/KD-G395
KD-G396/KD-G398
KD-G299
only for
KD-G240/KD-G341/KD-G342
KD-G343/KD-G347/KD-G394
KD-G395/KD-G396/KD-G398
KD-G299
COPYRIGHT © 2008 Victor Company of Japan, Limited
Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)
Lead free solder used in the board (material : Sn-Cu, melting point : 230 Centigrade)
only for
KD-G347
only for
KD-G140
KD-G240
KD-G299
only for
KD-G341
KD-G342
KD-G343
KD-G347
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25
COPYRIGHT © 2008 Victor Company of Japan, Limited
No.MA372<Rev.002>
2008/5
SPECIFICATION
KD-G140/KD-G240
Audio amplifier section
Power Output 20 W RMS × 4 Channels at 4 Ω and < or = 1% THD+N
Signal to Noise Ratio 80 dBA (reference: 1 W into 4 Ω)
Load Impedance 4 Ω (4 Ω to 8 Ω allowance)
Tone Control Range Bass ±12 dB at 60 Hz
Mid-range ±12 dB at 1 kHz
Treble ±12 dB at 7.5 kHz
Frequency Response 40 Hz to 20 000 Hz
Line-Out Level/Impedance 2.5 V/20 kΩ load (full scale)
Output Impedance 1 kΩ
Subwoofer-Out Level/Impedance 2.5 V/20 kΩ load (full scale)
Tuner section
Frequency Range FM 87.5 MHz to 107.9 MHz (with channel interval set to 100 kHz or 200 kHz)
87.5 MHz to 108.0 MHz (with channel interval set to 50 kHz)
AM 530 kHz to 1 710 kHz (with channel interval set to 10 kHz)
531 kHz to 1 602 kHz (with channel interval set to 9 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)
Frequency Response 40 Hz to 15 000 Hz
Stereo Separation 35 dB
AM Tuner Sensitivity/Selectivity 20 µV/35 dB
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 93 dB
Signal-to-Noise Ratio 98 dB
Wow and Flutter Less than measurable limit
MP3 Decoding Format
(for KD-G240) Max. Bit Rate
WMA (Windows Media®
Audio) Decoding Format
(for KD-G240)
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 (32°F to 104°F)
Dimensions (W × H × D) Installation Size (approx.) 182 mm × 52 mm × 160 mm (7-3/16” × 2-1/16” × 6-5/16”)
Max. Bit Rate 192 kbps
Panel Size (approx.) 188 mm × 58 mm × 5 mm (7-7/16” × 2-5/16” × 1/4”)
Mass (approx.) 1.3 kg (2.9 lbs) (excluding accessories)
65 dB
CD player section
MPEG1/2 Audio Layer 3
320 kbps
General
Design and specifications are subject to change without notice.
1-2 (No.MA372<Rev.002>)
KD-G244/KD-G245/KD-G248/KD-G394/KD-G395/KD-G396/KD-G398
Audio amplifier section
Maximum Power Output: Front/Rear 50 W per channel
Continuous Power Output (RMS): Front/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 ±12 dB at 60 Hz
Mid-range ±12 dB at 1 kHz
Treble ±12 dB at 7.5 kHz
Frequency Response 40 Hz to 20 000 Hz
Signal-to-Noise Ratio 70 dB
Line-Out Level/Impedance (for KD-G395/KD-G396/KD-G398) 2.5 V/20 kΩ load (full scale)
Output Impedance (for KD-G395/KD-G396/KD-G398) 1 kΩ
Other Terminal (except for KD-G248/KD-G398) AUX (auxiliary) input jack
Tuner section
Frequency Range FM 87.5 MHz to 108.0 MHz
AM 531 kHz to 1 602 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)
Frequency Response 40 Hz to 15 000 Hz
Stereo Separation (for KD-G244/KD-G394) 35 dB
AM Tuner Sensitivity/Selectivity 20 µV/35 dB
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 93 dB
Signal-to-Noise Ratio 98 dB
Wow and Flutter Less than measurable limit
MP3 Decoding Format (MPEG1/
2 Audio Layer 3) (for KD-G395/
KD-G396/KD-G398)
WMA (Windows Media® Audio)
Decoding Format (for KD-G395/
KD-G396/KD-G398)
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 × 160 mm
Max. Bit Rate 320 kbps
Max. Bit Rate 192 kbps
Panel Size (approx.) 188 mm × 58 mm × 5 mm
Mass (approx.) 1.3 kg (excluding accessories)
65 dB
(for others) 30 dB
CD player section
General
Design and specifications are subject to change without notice.
(No.MA372<Rev.002>)1-3
KD-G341/KD-G342/KD-G343
Audio amplifier section
Maximum Power Output: Front/Rear 50 W per channel
Continuous Power Output (RMS): Front/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 ±12 dB at 100 Hz
Treble ±12 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
Other Terminal AUX (auxiliary) input jack
Tuner section
Frequency Range FM 87.5 MHz to 108.0 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)
Frequency Response 40 Hz to 15 000 Hz
Stereo Separation 30 dB
MW Tuner Sensitivity/Selectivity 20 µV/35 dB
LW Tuner Sensitivity 50 µV
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 93 dB
Signal-to-Noise Ratio 98 dB
Wow and Flutter Less than measurable limit
MP3 Decoding Format
(MPEG1/2 Audio Layer 3)
WMA (Windows Media®
Audio) Decoding Format
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 × 160 mm
Max. Bit Rate 320 kbps
Max. Bit Rate 192 kbps
Panel Size (approx.) 188 mm × 58 mm × 13 mm
Mass (approx.) 1.3 kg (excluding accessories)
65 dB
CD player section
General
Design and specifications are subject to change without notice.
1-4 (No.MA372<Rev.002>)
KD-G347
Audio amplifier section
Maximum Power Output: Front/Rear 50 W per channel
Continuous Power Output (RMS): Front/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 ±12 dB at 100 Hz
Treble ±12 dB at 10 kHz
Frequency Response 40 Hz to 20 000 Hz
Signal-to-Noise Ratio 70 dB
Other Terminal AUX (auxiliary) input jack
Tuner section
Frequency Range FM1/2 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)
Frequency Response 40 Hz to 15 000 Hz
Stereo Separation 30 dB
MW Tuner Sensitivity/Selectivity 20 µV/35 dB
LW Tuner Sensitivity 50 µV
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 93 dB
Signal-to-Noise Ratio 98 dB
Wow and Flutter Less than measurable limit
MP3 Decoding Format
(MPEG1/2 Audio Layer 3)
WMA (Windows Media®
Audio) Decoding Format
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 × 160 mm
Max. Bit Rate 320 kbps
Max. Bit Rate 192 kbps
Panel Size (approx.) 188 mm × 58 mm × 13 mm
Mass (approx.) 1.3 kg (excluding accessories)
65 dB
CD player section
General
Design and specifications are subject to change without notice.
(No.MA372<Rev.002>)1-5
KD-G396
AUDIO AMPLIFIER SECTION
Maximum Power Output Front/Rear 50 W per channel
Continuous Power Output
(RMS)
Front/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 ±12 dB at 60 Hz
Mid-range ±12 dB at 1 kHz
Treble ±12 dB at 7.5 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
Other Terminal AUX (auxiliary) input jack
TUNER SECTION
Frequency Range FM 87.5 MHz to 108.0 MHz
AM 531 kHz to 1 602 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
AM Tuner Sensitivity/Selectivity 20 µV/35 dB
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 93 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)
(approx.)
Installation Size 178 mm × 50 mm × 160 mm
Panel Size 178 mm × 50 mm × 17 mm
Mass 1.3 kg (excluding accessories)
Design and specifications are subject to change without notice.
1-6 (No.MA372<Rev.002>)
KD-G299
Audio amplifier section
Power Output 20 W RMS × 4 Channels at 4 Ω and < or = 1% THD+N
Signal to Noise Ratio 80 dBA (reference: 1 W into 4 Ω)
Load Impedance 4 Ω (4 Ω to 8 Ω allowance)
Tone Control Range Bass ±12 dB at 60 Hz
Mid-range ±12 dB at 1 kHz
Treble ±12 dB at 7.5 kHz
Frequency Response 40 Hz to 20 000 Hz
Line-Out Level/Impedance 2.5 V/20 kΩ load (full scale)
Output Impedance 1 kΩ
Subwoofer-Out Level/Impedance 2.5 V/20 kΩ load (full scale)
Tuner section
Frequency Range FM 87.5 MHz to 107.9 MHz (with channel interval set to 100 kHz or 200 kHz)
87.5 MHz to 108.0 MHz (with channel interval set to 50 kHz)
AM 530 kHz to 1 710 kHz (with channel interval set to 10 kHz)
531 kHz to 1 602 kHz (with channel interval set to 9 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)
Frequency Response 40 Hz to 15 000 Hz
Stereo Separation 35 dB
AM Tuner Sensitivity/Selectivity 20 µV/35 dB
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 93 dB
Signal-to-Noise Ratio 98 dB
Wow and Flutter Less than measurable limit
MP3 Decoding Format
Max. Bit Rate
WMA (Windows Media®
Audio) Decoding Format
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 (32°F to 104°F)
Dimensions (W × H × D) Installation Size (approx.) 182 mm × 52 mm × 160 mm (7-3/16” × 2-1/16” × 6-5/16”)
Max. Bit Rate 192 kbps
Panel Size (approx.) 188 mm × 58 mm × 5 mm (7-7/16” × 2-5/16” × 1/4”)
Mass (approx.) 1.3 kg (2.9 lbs) (excluding accessories)
65 dB
CD player section
MPEG1/2 Audio Layer 3
320 kbps
General
Design and specifications are subject to change without notice.
(No.MA372<Rev.002>)1-7
1.1 Safety Precautions
SECTION 1
PRECAUTION
!
!
Burrs formed during molding may be left over on some parts of the chassis. Therefore,
pay attention to such burrs in the case of preforming repair of this system.
Please use enough caution not to see the beam directly or touch it in case of an
adjustment or operation check.
1-8 (No.MA372<Rev.002>)
1.2 Preventing static electricity
Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laser
diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs.
1.2.1 Grounding to prevent damage by static electricity
Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as laser products.
Be careful to use proper grounding in the area where repairs are being performed.
(1) Ground the workbench
Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over it before placing the
traverse unit (optical pickup) on it.
(2) Ground yourself
Use an anti-static wrist strap to release any static electricity built up in your body.
(caption)
Anti-static wrist strap
1M
Conductive material
(conductive sheet) or iron plate
(3) Handling the optical pickup
• In order to maintain quality during transport and before installation, both sides of the laser diode on the replacement optical
pickup are shorted. After replacement, return the shorted parts to their original condition.
(Refer to the text.)
• Do not use a tester to check the condition of the laser diode in the optical pickup. The tester's internal power source can easily
destroy the laser diode.
1.3 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) It is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it.
1.4 Attention when traverse unit is decomposed
*Please refer to "Disassembly method" in the text for the pickup unit.
• Apply solder to the short land before the card wire is disconnected from the connector on the pickup unit.
(If the card wire is disconnected without applying solder, the pickup may be destroyed by static electricity.)
• In the assembly, be sure to remove solder from the short land after connecting the card wire.
Mechanism control board
CN102
Flexible wire
Short land section
Pickup
(No.MA372<Rev.002>)1-9
1.5 Important for laser products
1.CLASS 1 LASER PRODUCT
2.CAUTION :
(For U.S.A.) Visible and/or invisible class II laser radiation
when open. Do not stare into beam.
(Others) Visible and/or invisible class 1M laser radiation
when open. Do not view directly with optical instruments.
3.CAUTION : Visible and/or invisible laser radiation when
open and inter lock failed or defeated. Avoid direct
exposure to beam.
4.CAUTION : This laser product uses visible and/or invisible
laser radiation and is equipped with safety switches which
prevent emission of radiation when the drawer is open and
the safety interlocks have failed or are defeated. It is
dangerous to defeat the safety switches.
5.CAUTION : If safety switches malfunction, the laser is able
to function.
6.CAUTION : Use of controls, adjustments or performance of
procedures other than those specified here in may result in
hazardous radiation exposure.
!
Please use enough caution not to
see the beam directly or touch it
in case of an adjustment or operation
check.
REPRODUCTION AND POSITION OF LABELS and PRINT
WARNING LABEL and PRINT
1-10 (No.MA372<Rev.002>)
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