JVC KW-TC410 User manual

SERVICE MANUAL
COPYRIGHT © 2005 Victor Company of Japan, Limited No.MA244
2005/12
CD/CASSETTE RECEIVER
MA244200512
KW-TC410,KW-TC411
Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)
TABLE OF CONTENTS
1 PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16
Area suffix
UN --------------------- Indonesia

1-2 (No.MA244)
SPECIFICATION
Design and specification are subject to change without notice.
AUDIO AMPLIFIER SECTION
Maximum Power Output Front 50 W per channel
Rear 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 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.
Load Impedance 4 Ω(4 Ωto 8 Ωallowance)
Equalizer Control Range Low ±12 dB (60 Hz, 80 Hz, 100 Hz, 120 Hz)
Mid ±12 dB
High ±12 dB (8 kHz, 10 kHz, 12 kHz, 15 kHz)
Frequency Response 40 Hz to 20 000 Hz
Signal-to-Noise Ratio 70 dB
Line-Out Level/Impedance 2.0 V/20 kΩload (full scale)
Output Impedance 1 kΩ
Other terminals CD changer, 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
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 (KW-TC411/KW-TC410 only) MPEG1/2 Audio Layer 3
Max. Bit Rate: 320 kbps
WMA (Windows Media® Audio) Decoding Format (KW-TC411/KW-TC410 only) Max. Bit Rate: 192 kbps
CASSETTE DECK SECTION
Wow and Flutter 0.1 % (WRMS)
Fast-Wind Time 100 sec. (C-60)
Frequency Response 30 Hz to 16 000 Hz (Normal tape)
Signal-to-Noise Ratio
(Normal tape)
Dolby B NR ON 65 dB
Dolby B NR OFF 56 dB
Stereo Separation 40 dB
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.) 178 mm ×100 mm ×158 mm
Set Size (approx.) 178 mm ×100 mm ×177 mm
Mass (approx.) 2.3 kg (excluding accessories)

(No.MA244)1-3
SECTION 1
PRECAUTIONS
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.
!Please use enough caution not to see the beam directly or touch it in case of an
adjustment or operation check.

1-4 (No.MA244)
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.
(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.
1M
(caption)
Anti-static wrist strap
Conductive material
(conductive sheet) or iron plate
Pickup
Short-circuit point
(Soldering)
Flexible wire

(No.MA244)1-5
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.
REPRODUCTION AND POSITION OF LABELS
!
Please use enough caution not to
see the beam directly or touch it
in case of an adjustment or operation
check.
WARNING LABEL
CAUTION : Visible and Invisible
laser radiation when open and
interlock failed or defeated.
AVOID DIRECT EXPOSURE TO
BEAM. (e)
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)
ADVARSEL : Synlig og usynlig
laserstråling når maskinen er
åben eller interlocken fejeler.
Undgå direkte eksponering til
stråling. (d)
CLASS 1
LASER PRODUCT

1-6 (No.MA244)
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
2.1 CD mechanism and cassette mechanism
For the CD mechanism, please refer the mechanism manual TN2001-1013 No.MY001.
For the Cassette mechanism, please refer the mechanism manual CDS-802JE3 No.MY002.

(No.MA244)1-7
SECTION 3
DISASSEMBLY
3.1 Main body section
3.1.1 Removing the front panel assembly
(See Figs.1 and 2)
(1) From the both side of the main body, remove the two
screws Aattaching the front panel assembly. (See Figs.1
and 2.)
(2) Release the four joints aand remove the front panel as-
sembly in the direction of the arrow. (See Figs.1 and 2.)
Fig.1
Fig.2
Front panel assembly
a
A
Front panel assembly
a
A

1-8 (No.MA244)
3.1.2 Removing the heat sink
(See Figs.3 and 4)
(1) From the back side of the main body, remove the six
screws Battaching the heat sink. (See Fig.3.)
(2) Remove the heat sink from the main body.
Note:
• Before attaching the heat sink, attach the cooling rubbers on
the power amplifier IC. (See Fig.4)
• When attaching the heat sink, set the projections bon the
rear bracket in the holes of the heat sink. (See Fig.3.)
3.1.3 Removing the rear bracket
(See Fig.4)
• Remove the heat sink.
(1) From the back side of the main body, remove the six
screws C, two screws Dand screw Eattaching the rear
bracket.
(2) Remove the rear bracket from the main body.
Fig.3
Fig.4
3.1.4 Removing the bottom chassis assembly
(See Fig.5)
• Remove the front panel assembly, heat sink and rear bracket.
(1) From the bottom side of the main body, remove the four
screws Fattaching the bottom chassis assembly.
(2) Take out the bottom chassis assembly from the main body.
Reference:
When attaching the bottom chassis assembly, set the projec-
tions cof the main body in the holes of the bottom chassis as-
sembly.
Fig.5
B
B
B
bb
Rear bracket Heat sink
CD
C
E
C
C
Rear bracket
Cooling rubbers
Power amplifier IC
Bottom chassis assembly
c
FF

(No.MA244)1-9
3.1.5 Removing the cassette mechanism control board
(See Fig.6)
• Remove the front panel assembly, heat sink, rear bracket and
bottom chassis assembly.
(1) From the inside of the bottom chassis assembly, discon-
nect the card wire from the connector CN403 on the cas-
sette mechanism control board.
(2) Disconnect the wire from the connector CN402 on the cas-
sette mechanism control board.
(3) Remove the three screws Gattaching the cassette mech-
anism control board.
(4) Take out the cassette mechanism control board from the
bottom chassis assembly.
Reference:
• When attaching the cassette mechanism control board, set
the projections dof the bottom chassis assembly in the
holes of the cassette mechanism control board.
• After attaching the cassette mechanism control board, fix
the wire with the wire clamp as before.
Fig.6
3.1.6 Removing the cassette mechanism assembly
(See Fig.7)
• Remove the front panel assembly, heat sink, rear bracket and
bottom chassis assembly.
(1) From the inside of the bottom chassis assembly, discon-
nect the card wire from the connector CN403 on the cas-
sette mechanism control board.
(2) Disconnect the wire from the connector CN402 on the cas-
sette mechanism control board.
(3) Remove the four screws Hattaching the cassette mecha-
nism assembly.
Reference:
After attaching the cassette mechanism control board, fix the
wire with the wire clamp as before.
Fig.7
G
G
d
d
d
CN403CN402
Wire clamp
Cassette mechanism control board
Bottom chassis assembly
CN403
CN402
Wire clamp
Cassette mechanism control board
Bottom chassis assembly
H
H
HCassette mechanism assembly

1-10 (No.MA244)
3.1.7 Removing the func board
(See Fig.8)
• Remove the front panel assembly, heat sink, rear bracket and
bottom chassis assembly.
(1) From the bottom side of the main body, disconnect the wire
from the connector CN321 on the func board.
(2) Remove the screw Jand take out the func board from the
main body.
3.1.8 Removing the middle chassis assembly
(See Fig.8)
• Remove the front panel assembly, heat sink, rear bracket and
bottom chassis assembly.
(1) From the bottom side of the main body, remove the four
screws Kattaching the middle chassis assembly.
(2) Disconnect the connector CN705 of the main board on the
middle chassis assembly from the CD mechanism assem-
bly in an upward direction.
Fig.8
3.1.9 Removing the main board
(See Fig.9)
• Remove the front panel assembly, heat sink, rear bracket, bot-
tom chassis assembly and middle chassis assembly.
(1) From the top side of the middle chassis assembly, discon-
nect the wire from the connector CN323 on the main board.
(2) Remove the four screws Mattaching the main board on the
middle chassis.
(3) Remove the main board from the middle chassis.
Reference:
When attaching the main board, set the projections eof the
middle chassis in the holes of the main board.
Fig.9
Main board
Func board
CN705
CN321
Middle chassis assembly
KK
J
Main board
Middle chassis
ee
M
M
M
CN323