JVC kd-g285u, kd-g28un, kd-g285ut, kd-g285uh Service Manual
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SERVICE MANUAL
CD RECEIVER
TEL 13942296513 QQ 376315150 892498299
MA24620062
KD-G285U,KD-G285UN,
KD-G285UT,KD-G285UH
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TEL 13942296513 QQ 376315150 892498299
TEL
13942296513
Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
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COPYRIGHT © 2006 Victor Company of Japan, Limited
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No.MA246
2006/2
SPECIFICATION
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Maximum Power Output Front 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
Load Impedance 4 Ω (4 Ω to 8 Ω allowance)
Tone Control Range Bass ±10 dB at 100 Hz
Frequency Response 40 Hz to 20 000 Hz
TEL 13942296513 QQ 376315150 892498299
Signal-to-Noise Ratio 70 dB
Line-Out Level/Impedance 2.0 V/20 kΩ load (full scale)
Output Impedance 1 kΩ
Other Terminals CD changer
Frequency Range FM 87.5 MHz to 108.0 MHz
FM Tuner Usable Sensitivity 11.3 dBf (1.0 µV/75 Ω)
TEL
AM Tuner Sensitivity 20 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 96 dB
Signal-to-Noise Ratio 98 dB
Wow and Flutter Less than measurable limit
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
Mass (approx.) 1.4 kg (excluding accessories)
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Rear 50 W per channel
Rear 19 W per channel into 4 Ω, 40 Hz to 20 000 Hz at no more
Treble ±10 dB at 10 kHz
AM 531 kHz to 1 602 kHz
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
Selectivity 35 dB
Panel Size (approx.) 188 mm × 58 mm × 11 mm
AUDIO AMPLIFIER SECTION
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TUNER SECTION
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CD PLAYER SECTION
GENERAL
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than 0.8% total harmonic distortion.
than 0.8% total harmonic distortion.
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Design and specifications are subject to change without notice.
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SECTION 1
PRECAUTION
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Please refer to "KD-G425 (No.MA245)" about this section.
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TEL 13942296513 QQ 376315150 892498299
SPECIFIC SERVICE INSTRUCTIONS
Please refer to "KD-G425 (No.MA245)" about this section.
TEL
13942296513
For disassembly and adjustment are follow the service manual No.MA245.
For the CD mechanism, please refer the mechanism manual TN2007-1001 (No.MY003).
SECTION 2
SECTION 3
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DISASSEMBLY
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SECTION 4
ADJUSTMENT
Please refer to "KD-G425 (No.MA245)" about this section.
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(No.MA246)1-3
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5.1 16 PIN CORD DIAGRAM
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BK
RD
BL
BL/WH
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YL
NC
NC
NC
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16
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14
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SECTION 5
TROUBLESHOOTING
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BK
RD
BL
WH White
Black
Red
Blue
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GN
VI Violet
GY
YL
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Green
Gray
Yellow
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WH
TEL 13942296513 QQ 376315150 892498299
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GN
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VI
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GY
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16 YL
8 BK
13942296513
7 RD
3 GN
11 GN/BK
2 VI
10 VI/BK
4 WH
WH/BK
12
GN/BK
11
VI/BK
10
GY/BK
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MEMORY
GND
ACC
RL+
RL-
RR+
RR-
FL+
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GND
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1-4 (No.MA246)
RR
FR
FL
RL
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REMOTE
12 WH/BK
1 GY
9 GY/BK
5 BL/WH
6 BL
Rear Right
Front Right
Front Left
Rear Left
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Remote
FL-
FR+
FR-
REMOTE
REMOTE
OUTPUT
ANT
ANT
ACC
GND
MEMORY
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POWER
ANTENNA
Auto Antenna
ACC Line
Ground
Memory Backup Battery+
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TEL 13942296513 QQ 376315150 892498299
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(No.MA246)1-5
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Victor Company of Japan, Limited
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Mobile Entertainment Business Group Mobile Entertainment Category 10-1,1chome,Ohwatari-machi,Maebashi-city,Gumma-ken, 371-8543,Japan
(No.MA246)
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Printed in Japan
VPT
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SCHEMATIC DIAGRAMS
CD RECEIVER
TEL 13942296513 QQ 376315150 892498299
KD-G285U,KD-G285UN
KD-G285UT,KD-G285UH
CD-ROM No.SML200602
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TEL 13942296513 QQ 376315150 892498299
TEL
13942296513
Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)
Contents
Block diagram
Standard schematic diagrams
Printed circuit boards
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COPYRIGHT 2006 Victor Company of Japan, Limited.
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No.MA246SCH
2006/2
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Safety precaution
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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.
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Block diagram
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TEL 13942296513 QQ 376315150 892498299
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PICK UP
FOCUS &
TRACKING
COIL
LOAD&FEED
MOTOR
POSITION SET
SWITCH
SPINDLE
MOTOR
T
E
L
SW1, SW2
LCD & Key control section
D630
POWER LED
S601 to S618
KEY MATRIX
IC661
LCD DRIVER
COM1 to COM3
S1 to S52
LCD1
LCD DISPLAY
3
VF1,VF2,VT1,VT2,LD,MD,VREF
TRACKING+,TRACKINGFOCUS+,FOCUS-
FEED+
FEED-
PSW
SPINDLE+
SPINDLE-
1
SW1, SW2
ACC5V
KEY0
KEY1
KEY2
LCD.CL
LCD.DA
LCD.CE
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9
D631 to D648
D650,D651
LIGHTING
DISPLAY
ILL_10V
IC681
REMOCON
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4
D652,D653
Q670,Q671
DETACH
DIMMEROUT
REMOCON
2
DIMMER
DIMMER
CONT.
JS686
ENCODER
2
ENC1
ENC2
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9
CJ601
CN501
6
CN701
1
CD mechanism control section
5
KEY0 to 2
LCD.SCK
LCD.SO
LCD.CE
REMOCON
ENC1,ENC2
DETACH
DIMMEROUT
ILL_10V
5
SPINDLE+
1
SPINDLEFEED+
FEEDTRACKING+
TRACKINGFOCUS+
FOCUS-
IC561
BTL
DRIVER
3
TRV
TVD
ECM
ECS
FOD
KICK
TRD
1
VF1,VF2
VT1,VT2
MD,LD
IC501
RF AMP
FBAL
TBAL
FE
TE
RFENV
VDET
OFTR
RFDET
BDO
LDON
ARF
IC521
DSP&DAC
5
OUTL
OUTR
0
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IC581
CD L.P.F.
ANT
SW1
SW2
PSW
CD.RESET
STATUS
SUBQ
SQCK
TLOCK
FLOCK
CD.SENSE
MLD
MD ATA
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MCLK
LM
MSW
Main amplifier section
CJ1
3
TU1
FM/AM
TUNER
SSM
EO
IFC
IFC.CONT
FM.OSC
S.METER
FM/AM
SEEK/STOP
SD/ST
MONO
IC701
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CPU
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TU_L
TU_R
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JBUS.SI
JBUS.SO
JBUS.IO
JBUS.SCK
JBUS.INT
JBUS.SI
MUTE
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Q781
Q782
MUTING
SDA
SCL
5
CD.LCH
CD.RCH
2
IC161
E.VOLUME
5
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MUTE.CONT
Q301
OUTLF,OUTRF
OUTLR,OUTRR
0
P.SAVE2
ANT REMOTE
9
Q341, Q351
LRO
RRO
MUTE
P.ICSTBY
P.ICOFFSET
EACH BLOCK
8
SW5V,ACC5V
VDD.CD8V
AUDIO9V,ILL_10V
REGULATOR
LINE OUT
MUTING
IC301
POWER
AMP.
9
IC901
IC801
JVC BUS
2
ACC
SCK
8
4
LRO
RRO
9
LF+,LFRF+,RFLR+,LRRR+,RR-
CH.L
CH.R
2
CJ321
8
CN901
J801
9
LINE OUT
REAR
9
2
SPK
BATTERY
CHANGER
CONTROL
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