JVC KDG-140-J, KDG-240-J, KDG-244-UI, KDG-245-U, KDG-245-UH Service manual

SERVICE MANUAL

CD RECEIVER

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

only for

KD-G347 only for KD-G341

KD-G342

KD-G343 KD-G347

only for KD-G140 KD-G240 KD-G299

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)

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		65 dB
				(400 kHz)
				Frequency Response		40 Hz to 15 000 Hz
				Stereo Separation		35 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
(for KD-G240)				Max. Bit Rate
						320 kbps
WMA (Windows Media®			Max. Bit Rate			192 kbps
Audio)	Decoding Format
(for KD-G240)
						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 (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”)
				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)

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	65 dB
	(400 kHz)
	Frequency Response	40 Hz to 15 000 Hz
	Stereo Separation	(for KD-G244/KD-G394) 35 dB
		(for others) 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/	Max. Bit Rate	320 kbps
2 Audio Layer 3) (for KD-G395/
KD-G396/KD-G398)
WMA (Windows Media® Audio)	Max. Bit Rate	192 kbps
Decoding Format (for KD-G395/
KD-G396/KD-G398)
	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 ×	160 mm
	Panel Size (approx.)	188 mm ×	58 mm ×	5 mm
	Mass (approx.)	1.3 kg (excluding accessories)

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	65 dB
			(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
			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	Max. Bit Rate	320 kbps
(MPEG1/2 Audio Layer 3)
WMA	(Windows	Media®	Max. Bit Rate	192 kbps
Audio) Decoding Format
				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 ×	160 mm
			Panel Size (approx.)	188 mm ×	58 mm ×	13 mm
			Mass (approx.)	1.3 kg (excluding accessories)

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	65 dB
			(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
			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	Max. Bit Rate	320 kbps
(MPEG1/2 Audio Layer 3)
WMA	(Windows	Media®	Max. Bit Rate	192 kbps
Audio) Decoding Format
				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 ×	160 mm
			Panel Size (approx.)	188 mm ×	58 mm ×	13 mm
			Mass (approx.)	1.3 kg (excluding accessories)

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	Front/Rear	19 W per channel into 4 Ω 40 Hz to 20 000 Hz at no more than 0.8%
	(RMS)		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)	Installation Size	178 mm ×	50 mm ×	160 mm
	(approx.)
		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		65 dB
		(400 kHz)
		Frequency Response		40 Hz to 15 000 Hz
		Stereo Separation		35 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		Max. Bit Rate		MPEG1/2 Audio Layer 3
				320 kbps
WMA (Windows Media®	Max. Bit Rate			192 kbps
Audio) Decoding Format
				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 (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”)
		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)

Design and specifications are subject to change without notice.

(No.MA372<Rev.002>)1-7

SECTION 1

PRECAUTION

1.1Safety Precautions

! 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>)

1.2Preventing 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.

1.2.1Grounding 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.

1.3Handling 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.

1.4Attention 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

Short land section

CN102

Flexible wire	Pickup

(No.MA372<Rev.002>)1-9

1.5Important 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>)