JVC KDAR-270, KDG-220, KDG-227, KDG-321, KDG-323 Service manual
...
SERVICE MANUAL
CD RECEIVER
MA236200512
KD-AR270,KD-G220,KD-G227,KD-G321,
KD-G322,KD-G323,KD-G324,KD-G325,
KD-G326,KD-G327
KD-AR270,KD-G220
Area suffix
J ------------- Northern America
KD-G227,KD-G327
Area suffix
EE -------- Russian Federation
Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)
KD-G321,KD-G322
Area suffix
E ------------- Southern Europe
EX ------------ Northern Europe
EY ------------- Eastern Europe
EU ------------------------- Turkey
KD-G323,KD-G324
Area suffix
UI ---------------------------- India
KD-G325,KD-G326
Area suffix
UT ------------------------- Taiwan
UH ---------------------- Thailand
UN --------------------- Indonesia
U -------------------- Other Areas
TABLE OF CONTENTS
1 PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17
COPYRIGHT © 2005 Victor Company of Japan, Limited
No.MA236
2005/12
SPECIFICATION
KD-AR270/KD-G220
AUDIO AMPLIFIER SECTION
Power Output 18 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 ±10 dB at 100 Hz
Treble ±10 dB at 10 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
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) 65 dB
Frequency Response 40 Hz to 15 000 Hz
Stereo Separation 35 dB
Capture Ratio 1.5 dB
AM Tuner Sensitivity 20 µV
Selectivity 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 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 (32°F to 104°F)
Dimensions
(W × H × D)
Mass (approx.) 1.2 kg (2.6 lbs) (excluding accessories)
Installation Size (approx.) 182 mm × 52 mm × 150 mm (7-3/16" × 2-1/16" × 5-15/16")
Panel Size (approx.) 188 mm × 58 mm × 11 mm (7-7/16" × 2-5/16" × 7/16")
Design and specifications are subject to change without notice.
1-2 (No.MA236)
KD-G227
AUDIO AMPLIFIER SECTION
Maximum Power Output Front 45 W per channel
Rear 45 W per channel
Continuous Power Output
(RMS)
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
Signal-to-Noise Ratio 70 dB
Line-Out Level/Impedance 2.0 V/20 kΩ load (full scale)
Output Impedance 1 kΩ
Frequency Range FM 87.5 MHz to 108.0 MHz
FM Tuner Usable Sensitivity 11.3 dBf (1.0 µV/75 Ω)
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
MP3 Decoding Format MPEG1/2 Audio Layer 3
WMA (Windows Media® Audio) Decoding Format Max. Bit Rate: 192 kbps
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.) 1.2 kg (excluding accessories)
Front 17 W per channel into 4 Ω, 40 Hz to 20 000 Hz at no more than
0.8% total harmonic distortion.
Rear 17 W per channel into 4 Ω, 40 Hz to 20 000 Hz at no more than
0.8% total harmonic distortion.
Treble ±10 dB at 10 kHz
AM 522 kHz to 1 620 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
Capture Ratio 1.5 dB
Selectivity 35 dB
CD PLAYER SECTION
Max. Bit Rate: 320 kbps
GENERAL
Panel Size (approx.) 188 mm × 58 mm × 11 mm
Design and specifications are subject to change without notice.
(No.MA236)1-3
KD-G321/KD-G322
AUDIO AMPLIFIER SECTION
Maximum Power Output Front 50 W per channel
Rear 50 W per channel
Continuous Power Output
(RMS)
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
Signal-to-Noise Ratio 70 dB
Line-Out Level/Impedance 2.5 V/20 kΩ load (full scale)
Output Impedance 1 kΩ
Other terminals Steering wheel remote input
Frequency Range FM 87.5 MHz to 108.0 MHz
FM Tuner Usable Sensitivity 11.3 dBf (1.0 µV/75 Ω)
MW Tuner Sensitivity 20 µV
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 96 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 Max. Bit Rate: 192 kbps
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.) 1.2 kg (excluding accessories)
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.
Treble ±10 dB at 10 kHz
TUNER SECTION
AM (MW) 522 kHz to 1 620 kHz
(LW) 144 kHz to 279 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
Capture Ratio 1.5 dB
Selectivity 35 dB
CD PLAYER SECTION
Max. Bit Rate: 320 kbps
GENERAL
Panel Size (approx.) 188 mm × 58 mm × 11 mm
Design and specifications are subject to change without notice.
1-4 (No.MA236)
KD-G323/KD-G324
AUDIO AMPLIFIER SECTION
Maximum Power Output Front 50 W per channel
Rear 50 W per channel
Continuous Power Output
(RMS)
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
Signal-to-Noise Ratio 70 dB
Line-Out Level/Impedance 2.5 V/20 kΩ load (full scale)
Output Impedance 1 kΩ
Frequency Range FM 87.5 MHz to 108.0 MHz
FM Tuner Usable Sensitivity 11.3 dBf (1.0 µV/75 Ω)
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
MP3 Decoding Format MPEG1/2 Audio Layer 3
WMA (Windows Media® Audio) Decoding Format Max. Bit Rate: 192 kbps
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.) 1.2 kg (excluding accessories)
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.
Treble ±10 dB at 10 kHz
TUNER SECTION
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
Capture Ratio 1.5 dB
Selectivity 35 dB
CD PLAYER SECTION
Max. Bit Rate: 320 kbps
GENERAL
Panel Size (approx.) 188 mm × 58 mm × 11 mm
Design and specifications are subject to change without notice.
(No.MA236)1-5
KD-G325/KD-G326
AUDIO AMPLIFIER SECTION
Maximum Power Output Front 50 W per channel
Rear 50 W per channel
Continuous Power Output
(RMS)
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
Signal-to-Noise Ratio 70 dB
Line-Out Level/Impedance 2.5 V/20 kΩ load (full scale)
Output Impedance 1 kΩ
Frequency Range FM 87.5 MHz to 108.0 MHz
FM Tuner Usable Sensitivity 11.3 dBf (1.0 µV/75 Ω)
AM Tuner Sensitivity 20 µV
Type Compact disc player
Signal Detection System
Number of Channels
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
WMA (Windows Media® Audio) Decoding Format Max. Bit Rate: 192 kbps
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.) 1.2 kg (excluding accessories)
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.
Treble ±10 dB at 10 kHz
TUNER SECTION
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
Capture Ratio 1.5 dB
Selectivity 35 dB
CD PLAYER SECTION
Non-contact optical pickup (semiconductor laser)
2 channels (stereo)
Max. Bit Rate: 320 kbps
GENERAL
Panel Size (approx.) 188 mm × 58 mm × 11 mm
Design and specifications are subject to change without notice.
1-6 (No.MA236)
KD-G327
AUDIO AMPLIFIER SECTION
Maximum Power Output Front 50 W per channel
Rear 50 W per channel
Continuous Power Output
(RMS)
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
Signal-to-Noise Ratio 70 dB
Line-Out Level/Impedance 2.5 V/20 kΩ load (full scale)
Output Impedance 1 kΩ
Frequency Range FM1/FM2 87.5 MHz to 108.0 MHz
FM Tuner Usable Sensitivity 11.3 dBf (1.0 µV/75 Ω)
MW Tuner Sensitivity 20 µV
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 96 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 Max. Bit Rate: 192 kbps
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.) 1.2 kg (excluding accessories)
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.
Treble ±10 dB at 10 kHz
TUNER SECTION
FM3 65.00 MHz to 74.00 MHz
AM (MW) 522 kHz to 1 620 kHz
(LW) 144 kHz to 279 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
Capture Ratio 1.5 dB
Selectivity 35 dB
CD PLAYER SECTION
Max. Bit Rate: 320 kbps
GENERAL
Panel Size (approx.) 188 mm × 58 mm × 11 mm
Design and specifications are subject to change without notice.
(No.MA236)1-7
1.1 Safety Precautions
SECTION 1
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.MA236)
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 CD players.
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 CD pickup unit.
• Apply solder to the short land before the flexible wire is disconnected from the connector on the CD pickup unit.
(If the flexible wire is disconnected without applying solder, the CD pickup may be destroyed by static electricity.)
• In the assembly, be sure to remove solder from the short land after connecting the flexible wire.
Pickup
Wires
Push switch
Base board
Frame
Flexible wire
Connector
CD mechanism
assembly
Pickup
(No.MA236)1-9
1.5 Important for laser products
!
1.CLASS 1 LASER PRODUCT
2.DANGER : Invisible laser radiation when open and inter
lock failed or defeated. Avoid direct exposure to beam.
3.CAUTION : There are no serviceable parts inside the
Laser Unit. Do not disassemble the Laser Unit. Replace
the complete Laser Unit if it malfunctions.
4.CAUTION : The CD,MD and DVD player uses 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
WARNING LABEL
CAUTION : Visible and Invisible
CLASS 1
LASER PRODUCT
laser radiation when open and
interlock failed or defeated.
AVOID DIRECT EXPOSURE TO
BEAM. (e)
ADVARSEL : Synlig og usynlig
laserstråling når maskinen er
åben eller interlocken fejeler.
Undgå direkte eksponering til
stråling. (d)
VARNING : Synlig och
osynling laserstrålning när
den öppnas och spärren är
urkopplad. Betrakta ej
strålen. (s)
VARO : Avattaessa ja suojalukitus
ohitettuna tai viallisena olet alttiina
näkyvälle ja näkymättömälle
lasersäteilylle. Vältä säteen
kohdistumista suoraan itseesi. (f)
1-10 (No.MA236)
2.1 Difference point
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
KD-AR270
KD-G220,KD-G227
Remote ready YES NO YES YES
Steering remote ready NO YES NO NO
Power antenna NO NO YES NO
Telephone Muting NO YES NO YES
2.2 CD mechanism assembly
For CD mechanism, please refer mechanism amnual No. MY003.
KD-G322
KD-G321
KD-G323,KD-G324
KD-G325,KD-G326
KD-G327
(No.MA236)1-11
SECTION 3
DISASSEMBLY
3.1 Main body section
3.1.1 Removing the front panel assembly
(See Fig.11)
(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.
Joint a
Front panel assembly
Fig.1
Bottom cover
Detach button
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 joint d and joint e on the both sides of the main
body, then remove the front chassis assembly toward the
front.
Joint a
Joint c
Joint d
Front chassis assembly
Joint b
Fig.2
A
Joint e
Fig.3
1-12 (No.MA236)
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, three screws E and two
screws F attaching the rear bracket on the back side of the
main body. (For KD-AR270, KD-G220, KD-G227, KDG323, KD-G324, KD-G325, KD-G326, KD-G327)
(2) Remove the four screws D, three screws E and two screws
F attaching the rear bracket on the back side of the main
body. (For KD-G321, KD-G322)
(3) Remove the rear bracket.
F
C
E
C
(For KD-AR270,KD-G220,KD-G227,KD-G323,
B
Side panel
Fig.4
KD-G324,KD-G325,KD-G326,KD-G327 )
Rear bracket
EF
DD
(For KD-G321,KD-G322)
Rear bracket
EFE
F
DD
Fig.5
(No.MA236)1-13
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".)
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.
on the main board from
G
CN501
Main board
G
Rear bracket
Fig.6
H
1-14 (No.MA236)
CD mechanism assembly
Top chassis
H
Fig.7
3.1.8 Removing the switch board
(See Figs.8 to 10)
• Remove the front panel assembly.
(1) Remove the four screws J on the back side of the front pan-
el assembly. (See Fig.8.)
(2) Release the 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.)
J
J
Fig.8
Joints f
Rear cover
Joints f Joints f
Switch board
Joints f
Fig.9
Joint
Front panel assembly
g
J
Fig.10
(No.MA236)1-15
SECTION 4
ADJUSTMENT
4.1 Adjustment method
Test instruments required for adjustment
(1) Digital oscilloscope (100MHz)
(2) Electric voltmeter
(3) Digital tester
(4) Tracking offset meter
(5) Test Disc JVC :CTS-1000
(6) Extension cable for check
EXTSH002-22P × 1
Standard volume position
Balance and Bass &Treble volume : lndication"0"
Loudness : OFF
How to connect the extension cable for adjusting
Caution:
Be sure to attach the heat sink and rear bracket onto the power amplifier IC and regulator IC respectively, before supply the power.
If voltage is applied without attaching these parts, the power amplifier IC and regulator IC will be destroyed by heat.
Standard measuring conditions
Power supply voltage DC14.4V(10.5 to 16V)
Load impedance 20KΩ(2 Speakers connection)
Output Level Line out 2.0V (Vol. MAX)
Dummy load
Exclusive dummy load should be used for AM,and FM. For FM
dummy load,there is a loss of 6dB between SSG output and
antenna input.The loss of 6dB need not be considered since
direct reading of figures are applied in this working standard.
1-16 (No.MA236)
Heat sink
Extension cable
EXTSH002-22P
Rear bracket
5.1 Feed section
SECTION 5
TROUBLESHOOTING
5.2 Focus section
Is 4V present at both
sides of the feed motor?
NO
Is the voltage output at
pin 4 and pin 5 of IC501?
NO
Is the voltage input at pin
28 of IC501?
NO
Is the voltage output at
pin 7 of IC521?
NO
Is the power supply
present at pin 37,
pin 49, pin 53, pin 56
and pin 72 of IC521?
NO
Check the connections
of CD8V power supply.
YES
Check the feed motor.
Check the connections
YES
between the feed motor
and IC501.
Is the power supply
YES YES
present at pin 3, pin 12
and pin 21 of IC501?
NO
Check the connections
of CD8V power supply.
Check the connections
YES
between IC501 and
IC521.
YES
Check IC521.
Check IC501.
When the lens is
moving:
4V
Does the S-search
waveform appear at
IC501 pins 8 and 9?
NO
Is the voltage input at pin
15 of IC501?
NO
Is the voltage output at
pin 13 of IC521?
NO
Is the power supply
present at pin 37,
pin 49, pin 53, pin 56
and pin 72 of IC521?
NO
YES
Check the pickup and
its connections.
Is the power supply
YES
present at pin 3, pin 12
and pin 21 of IC501?
Check the connections
of CD8V power supply.
Check the connections
YES
between IC501 and
IC521.
YES
Check IC521.
YES
Check IC501.
NO
Check the connections
of CD8V power supply.
(No.MA236)1-17
5.3 Spindle section
Is the disk rotated?
NO
Is the voltage output at
pin 6 and pin 7 of IC501?
NO
Is the voltage input at pin
17 of IC501?
NO
Is the voltage output at
pin 5 of IC521?
NO
Is the power supply
present at pin 37,
pin 49, pin 53, pin 56
and pin 72 of IC521?
NO
YES
Does the RF signal appear
at pin 39 of IC521?
YES
Check the spindle motor
and its wiring.
Is the power supply
YES
present at pin 3, pin 12
and pin 21 of IC501?
Check the connections
of CD8V power supply.
Check the connections
YES
between IC501 and
IC521.
YES
Check IC521.
NO
YES
Is the RF waveform at
pin 39 of IC521 distorted?
Check the circuits in
the vicinity of IC521
or the pickup.
YES
NONO
Check IC501.
YES
Proceed to the Tracking
section
Check the connections
of CD8V power supply.
5.4 Tracking section
When the disc is rotated
at first:
Approx. 1.2V
Is the tracking error
signal output at pin 26
of IC521?
NO
Check the pickup and
its connections.
Replace IC521 or repair
YES
the malfunction
connection point
1-18 (No.MA236)
5.5 Signal processing section
5.5.1 Signal processing section
(For KD-AR270,KD-G220,KD-G227,KD-G323,KD-G324,KD-G325 and KD-G326)
Is the sound output from
both channels (L, R)?
YES
Normal
NO
No sound from either
YES
channel.
NO
Compare the L-ch and
R-ch to locate the
defective point.
5.5.2 Signal processing section
(For KD-G321,KD-G322 and KD-G327)
Is the sound output from
YES
both channels (L, R)?
NO
No sound from either
YES
channel.
NO
Compare the L-ch and
R-ch to locate the
defective point.
Is 9V present at pin 24
of IC161?
NO
Is 9V present at pin 13
of IC901?
NO
Check IC901 and its
peripheral circuits.
Normal
Is 9V present at pin 32
of IC171?
Is the audio signal
(including sampling
YES
output components)
output to pins 1 and 7 of
IC581 during playback?
Check IC581 and its
peripheral circuits.
Check the connections
YES
between pin 24 of IC161
and pin 13 of IC901.
Is the audio signal
(including sampling
YES
output components)
output to pins 1 and 7 of
IC581 during playback?
Check IC581 and its
peripheral circuits.
NO
NO
Is the audio signal output
YES
at pin 18 and pin 19 of
IC161 during playback?
Check IC161 and its
peripheral circuits.
Is the audio signal output
YES
at pin 18 and pin 19 of
IC171 during playback?
Check IC171 and its
peripheral circuits.
NO
YES
Check the power
amplifier IC301.
NO
NO
Is 9V present at pin 13
of IC901?
NO
Check IC901 and its
peripheral circuits.
Check the connections
YES
between pin 32 of IC171
and pin 13 of IC901.
YES
Check the power
amplifier IC301.
(No.MA236)1-19
5.6 Maintenance of laser pickup
(1) Cleaning the pick up lens
Before you replace the pick up, please try to clean the lens
with a alcohol soaked cotton swab.
(2) Life of the laser diode
When the life of the laser diode has expired, the following
symptoms will appear.
• The level of RF output (EFM output: amplitude of eye
pattern) will be low.
5.7 Replacement of laser pickup
Turn of the power switch and, disconnect the
power cord.
Replace the pickup with a normal one. (Refer
to "Removing the pickup unit" on the previous page.)
Is RF output
1.3 0.4Vp-p?
NO
Replace it.
YES
OK
(3) Semi-fixed resistor on the APC PC board
The semi-fixed resistor on the APC printed circuit board
which is attached to the pickup is used to adjust the laser
power.Since this adjustment should be performed to match
the characteristics of the whole optical block, do not touch
the semi-fixed resistor.
If the laser power is lower than the specified value, the laser diode is almost worn out, and the laser pickup should
be replaced. If the semi-fixed resistor is adjusted while the
pickup is functioning normally, the laser pickup may be
damaged due to excessive current.
Plug the power cord in, and turn the power on.
At this time, check that the laser emits for about
seconds and the objective lens moves up and down.
Note: Do not observe the laser beam directly.
Play a disc.
Check the eye-pattern at
RF test point or
ARF test point.
Finish.
1-20 (No.MA236)
5.8 16 PIN CORD DIAGRAM (for AR270,G220)
8
7
6
5
4
3
2
1
BK
RD
NC
BL/WH
WH
GN
VI
GY
YL
NC
NC
NC
WH/BK
GN/BK
VI/BK
GY/BK
16 YL
8 BK
7 RD
3 GN
11 GN/BK
2 VI
10 VI/BK
4 WH
16
15
14
13
12
11
10
9
MEMORY
GND
ACC
RL+
RL-
RR+
RR-
FL+
BK
RD
BL
Black
Red
Blue
WH White
GN
VI
GY
YL
Green
Violet
Gray
Yellow
GND
12 WH/BK
1 GY
9 GY/BK
5 BL/WH
Rear Right
RR
FL
Front Right
Front Left
Rear Left
FR
RL
FL-
FR+
FR-
REMOTE
REMOTE OUT
REMOTE
ACC
MEMORY
GND
Remote out
ACC Line
Memory Backup Battery+
Ground
(No.MA236)1-21
5.9 16 PIN CORD DIAGRAM (for G227)
8
7
6
5
4
3
2
1
BK
RD
NC
BL/WH
WH
GN
VI
GY
7 RD
16 YL
8 BK
5 BL/WH
3 GN
11 GN/BK
2 VI
10 VI/BK
YL
NC
NC
NC
WH/BK
GN/BK
VI/BK
GY/BK
16
15
14
13
12
11
10
9
MEMORY
REMOTE
ACC
GND
RL+
RL-
RR+
RR-
BK
RD
BL
Black
Red
Blue
WH White
GN
VI
GY
YL
Green
Violet
Gray
Yellow
RD
1
3
5
7
NC
NC
BL/WH
RD
RD 7
YL 4
NC
2
4
YL
NC
6
8
BK
8
5
7
8
1
2
4 WH
12 WH/BK
1 GY
9 GY/BK
RR
FR
FL
RL
Rear Right
Front Right
Front Left
Rear Left
FL+
FL-
FR+
FR-
REMOTE
ACC
MEMORY
GND
Remote out
ACC Line
Memory Backup Battery+
Ground
5
6
3
4
VI
1
GY
WH
GN
GY/BK
WH/BK
GN/BK
3
5
7
VI/BK
2
4
6
8
1-22 (No.MA236)
5.10 16 PIN CORD DIAGRAM (for G323,G324,G325,G326)
BK
8
YL
16
7
6
5
4
3
2
1
RD
BL
BL/WH
WH
GN
VI
GY
16 YL
8 BK
7 RD
3 GN
11 GN/BK
2 VI
NC
15
14
NC
NC
13
WH/BK
12
GN/BK
11
10
VI/BK
GY/BK
9
MEMORY
GND
ACC
RL+
RL-
RR+
BK
RD
BL
Black
Red
Blue
WH White
GN
Green
VI Violet
GY
YL
Gray
Yellow
GND
RR
FR
FL
RL
REMOTE
10 VI/BK
4 WH
12 WH/BK
1 GY
9 GY/BK
5 BL/WH
6 BL
Rear Right
Front Right
Front Left
Rear Left
Remote
RR-
FL+
FL-
FR+
FR-
REMOTE
ANT
ANT
ACC
GND
MEMORY
REMOTE
OUTPUT
ONLY
POWER
ANTENNA
Auto Antenna
ACC Line
Ground
Memory Backup Battery+
(No.MA236)1-23
5.11 16PIN CORD DIAGRAM (for G321,G322,G327)
8
7
6
5
BK
RD
NC
BL/WH
YL
NC
NC
BR
16
15
14
13
BK
RD
BL
WH
4
WH
GN
3
2
VI
1
GY
WH/BK
GN/BK
VI/BK
GY/BK
12
11
10
BR
9
Black
Red
Blue
White
Brown
GN
VI
GY
YL
Green
Violet
Gray
Yellow
BR
NC
1
NC
3
BL/WH
5
RD
7
YL
NC
BK
2
4
6
8
RR
FR
FL
RL
7 RD
16 YL
8 BK
5 BL/WH
13 BR
3 GN
11 GN/BK
2 VI
10 VI/BK
4 WH
12 WH/BK
1 GY
9 GY/BK
Rear Right
Front Right
Front Left
Rear Left
ACC
TEL
GND
MEMORY
RD
ACC Line
Telephone Muting
Ground
Memory Backup Battery+
RD 7
YL 4
8
5
2
7
8
1
2
5
6
3
4
VI/BK
VI
1
GY
3
WH
5
GN
7
GY/BK
WH/BK
GN/BK
2
4
6
8
REMOTE
ILL
1-24 (No.MA236)
Remote
Illuminations Control
ANT
Auto Antenna
(No.MA236)1-25
Victor Company of Japan, Limited
Mobile Entertainment Business Group Mobile Entertainment Category 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan
(No.MA236)
Printed in Japan
VPT
SCHEMATIC DIAGRAMS
CD RECEIVER
KD-AR270,KD-G220,KD-G227
KD-G321,KD-G322,KD-G323
KD-G324,KD-G325,KD-G326
KD-AR270,KD-G220
KD-G327
CD-ROM No.SML200512
Area suffix
J ------------- Northern America
KD-G227,KD-G327
Area suffix
EE -------- Russian Federation
KD-G321,KD-G322
Area suffix
E ------------- Southern Europe
EX ------------ Northern Europe
EY ------------- Eastern Europe
EU ------------------------- Turkey
UI ---------------------------- India
UT ------------------------- Taiwan
Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)
UH ---------------------- Thailand
UN --------------------- Indonesia
U -------------------- Other Areas
Contents
Block diagram (For KD-AR270,KD-G220,KD-G227,KD-G323,KD-G324,KD-G325,KD-G326)
Standard schematic diagrams (For KD-AR270,KD-G220,KD-G323,KD-G324,KD-G325,KD-G326)
Standard schematic diagrams (For KD-G227))
Block diagram (For KD-G321,KD-G322,KD-G327)
Standard schematic diagrams (For KD-G321,KD-G322)
Standard schematic diagrams (For KD-G327)
Printed circuit boards
COPYRIGHT 2005 Victor Company of Japan, Limited.
KD-G323,KD-G324
Area suffix
KD-G325,KD-G326
Area suffix
2-1
2-3
2-11
2-19
2-21
2-29
2-37 to 39
No.MA236SCH
2005/12
Safety 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.
Difference point
Remote ready
Steering remote ready
Power antenna
Telephone Muting
KD-AR270
KD-G220,KD-G227
YES
NO
NO
NO
KD-G321
KD-G322
NO
YES
NO NO
YES YES
KD-G323,KD-G324
KD-G325,KD-G326
NO
YES
NO
KD-G327
YESYES
NO
< MEMO >
M
Block diagram
3
VF1, VF2, VT1
PICK UP
FOCUS &
TRACKING
COIL
VT2, LD, MD
TRACKING+,
TRACKINGFOCUS+,
FOCUS-
(For KD-AR270,KD-G220,KD-G227,KD-G323,KD-G324,KD-G325,KD-G
Main amplifier & CD servo control section
CN502
CN502
IC501
BTL
DRIVER
TRP
FOP
SPOUT
TRVP
IC521
NRST,NPWDOWN
STAT,MLD,IRQ
MDATA,MCLK
DSP
L
LOAD&FEED
FEED+
FEED-
MOTOR
POSITION SET
PSW
SWITCH
SPINDLE
SPINDLE+
SPINDLE-
MOTOR
SW1, SW2
SW1, SW2
LCD & Key control section
IC681
REMOCON
IC661
LCD DRIVER
COM1
COM2
COM3
S1 to S52
LCD1
LCD DISPLAY
REMOCON
LCDCLK
LCDDA
LCDCE
D630 to D649
D652,D653
LIGHTING
DISPLAY
CN001
S601 to S616
KEY MATRIX
KEY0
KEY1
KEY2
ENC1
ENC2
JS686
ENCODER
CJ601
CN501
CN701
KEY0
KEY1
KEY2
LCDCLK
LCDDA
LCDCE
ENC1
ENC2
REMOCON
CN503
CN503
SPINDLE+
SPINDLEFEED+
FEEDTRACKING+
TRACKINGFOCUS+
FOCUS-
SW1, SW2, PSW
VF1, VF2
VT1, VT2
MD, LD
VREF
OUTL
OUTR
IC581
CD L.P.F.
2-1
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