JVC KD-G331E User manual

SERVICE MANUAL
COPYRIGHT © 2006 Victor Company of Japan, Limited No.MA287
2006/12
CD RECEIVER
MA287200612SERVICE MANUAL
KD-G331E, KD-G331EX, KD-G331EY,
KD-G331EU, KD-G332E, KD-G332EX,
KD-G332EY, KD-G332EU, KD-G333E,
KD-G333EX, KD-G333EY, KD-G333EU,
KD-G334UI, KD-G335U, KD-G335UN,
KD-G335UT, KD-G335UH, KD-G337BEE,
KD-G337SEE, KD-G338UF
COPYRIGHT © 2006 Victor Company of Japan, Limited
For the CD mechanism, please refer mechanism manual FLM-CD1-1 (No.MY006).
Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
(for KD-G331)
Only KD-G335
(for KD-G332)
(for KD-G333)
(for KD-G337)

1-2 (No.MA287)
SPECIFICATION
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 Ωto 8 Ωallowance)
Tone Control Range Bass ±12 dB at 100 Hz(For KD-G331,332,333,337)
Treble ±12 dB at 10 kHz(For KD-G331,332,333,337)
Bass ±12 dB at 60 Hz(For KD-G335,334,338)
Middle ±12 dB at 1 kHz(For KD-G335,334,338)
Treble ±12 dB at 7.5 kHz(For KD-G335,334,338)
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
Other Terminals Steering wheel remote input (For KD-G331,332,333)
Subwoofer-Out Level/Impedance 2.0 V/20 kΩload (full scale For KD-G335)
2.5V/20kΩload (full scale For KD-G334,338)
TUNER SECTION
Frequency Range FM 87.5 MHz to 108.0 MHz(For KD-G331,332,333,334,335,338)
FM1/FM2 87.5 MHz to 108.0 MHz(For KD-G337)
FM3 65.00 MHz to 74.00 MHZ(For KD-G337)
AM (MW) 522 kHz to 1 620 kHz(For KD-G331,332,333,337)
AM (LW) 144 kHz to 279 kHz(For KD-G331,332,333,337)
AM 531 kHz to 1 602 kHz(For KD-G334,335,338)
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
MW Tuner Sensitivity/Selectivity 20 µV/35 dB(For KD-G331,332,333,337)
LW Tuner Sensitivity 50 µV(For KD-G331,332,333,337)
AM Tuner Sensitivity/Selectivity 20 µV/35 dB(For KD-G334,335,338)
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

(No.MA287)1-3
Design and specifications are subject to change without notice.
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 182 mm ×52 mm ×150 mm(For KD-G331,332,333,337)
182 mm ×52 mm ×158 mm(For KD-G334,335,338)
Panel Size 187 mm ×58 mm ×13 mm
Mass 1.4 kg (
excluding accessories For KD-G331,332,333,337 )
1.3 kg (excluding accessories For KD-G334,335,338)

1-4 (No.MA287)
SECTION 1
PRECAUTION
1.1 Safety 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.

(No.MA287)1-5
1.2 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.
REPRODUCTION AND POSITION OF LABELS and PRINT
!Please use enough caution not to
see the beam directly or touch it
in case of an adjustment or operation
check.
WARNING LABEL and PRINT

1-6 (No.MA287)
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.

(No.MA287)1-7
SECTION 3
DISASSEMBLY
3.1 Main body
3.1.1 Removing the Bottom cover
(See Fig.1)
(1) Disengage the five hooks aengaged bottom cover.
Fig.1
3.1.2 Removing the Front chassis
(See Fig.2)
(1) Remove the two screws A(both side of Front chassis) at-
taching the Front chassis.
(2) Disengage the two hooks b(both side of Front chassis) en-
gaged Front chassis.
Fig.2
3.1.3 Removing the Heat sink
(See Fig.3)
(1) Remove the two screws Band one screw Cattaching the
Heat sink.
Fig.3
Hook a
Hook a
A
Hook b
BBC

1-8 (No.MA287)
3.1.4 Removing the Rear bracket
(See Fig.4)
(1) Remove the one screw Dattaching the Remote cable.
(2) Remove the one screw Eattaching the LINE OUT jack.
(3) Remove the two screws Fattaching the Connector jack.
(4) Remove the one screw Gattaching the Antenna jack.
(5) Remove the one screw Hattaching the IC bracket.
(6) Remove the three screws Jattaching the Rear bracket.
Fig.4
3.1.5 Removing the Main board assembly
(See Fig.5)
(1) Remove the two screws Kattaching the Main board as-
sembly.
(2) Disconnect the connector CN501 connected to CD board
assembly.
Fig.5
3.1.6 Removing the CD mechanism assembly
(See Fig.6)
(1) Remove the three screws Lattaching the CD mechanism
assembly.
Fig.6
DJJFF
EH JG
KK
CN501
LL
L

(No.MA287)1-9
3.2 Front panel assembly
3.2.1 Removing the Rear cover
(See Fig.7)
(1) Remove the Volume knob from Front panel assembly.
(2) Remove the five screws Mattaching the Rear cover.
(3) Disengage the fourteen hooks cengaged Front panel.
CAUTION:
When remove the Rear cover, Detach knob and spring are
easy to come off, do not lost them.
Fig.7
3.2.2 Removing the Switch board assembly
(See Fig.8)
(1) Disengage the illumination lens from front panel and then
take out the Switch board assembly.
Fig.8
3.3 CD mechanism assembly
For CD mechanism, please refer mechanism manual FLM-CD1-1 (No.MY006).
M
MM
MM
Hook cHook c
Hook cHook cHook cHook c
Illumination lens

1-10 (No.MA287)
SECTION 4
ADJUSTMENT
4.1 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
EXTCD001-26P ×1
4.2 Standard volume position
Balance and Bass & Treble volume : Indication "0"
Loudness : OFF
4.3 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 an-
tenna input. The loss of 6dB need not be considered since direct
reading of figures are applied in this working standard.
4.4 Standard measuring conditions
Power supply voltage : DC14.4V(10.5 - 16V)
Load impedance : 20KΩ(2 Speakers connection)
Output Level : Line out 2.0V (Vol. MAX)
4.5 How to connect the extension cable for adjustment
CAUTION :
Be sure to attach the heat sink and rear bracket onto the
power amplifier and regulator respectively, before supply the
power.
If voltage is applied without attaching those parts, the power
amplifier IC and regulator IC will be destroyed by heat.
Heat sink
Rear bracket
EXTCD001-26P
Extension cable