JVC TH-C5 Service Manual
SERVICE MANUAL
DVD DIGITAL THEATER SYSTEM
MB36220054
TH-C5
TH-C5
Area suffix
J ---------------------------- U.S.A.
C ------------------------- Canada
(SP-THC5C) (SP-THC5S)
(SP-THC5F)(SP-THC5F)
(XV-THC5)
(SP-PWC5)
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-37
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-42
COPYRIGHT © 2005 Victor Company of Japan, Limited
No.MB362
2005/4
SPECIFICATION
Center unit
Audio section Total Harmonic Distortion 0.02%*1
Digital input*2 DIGITAL IN(DBS):-21 dBm to -15 dBm(OPTICAL:660 nm ±30 nm)
Video section Video System NTSC
Horizontal Resolution 500 lines
Signal-to-Noise Ratio 64 dB
Video output level Composite:1.0 V(p-p)/75Ω
S-video-Y:1.0 V(p-p)/75 Ω
S-video-C:0.286 V(p-p)/75 Ω
Component-Y:1.0 V(p-p)/75 Ω
Component-PB/PR:0.7 V(p-p)/75 Ω
Video input sensitivity/Impedance (VCR IN) Composite:1.0 V(p-p)/75 Ω
S-video-Y:1.0 V(p-p)/75 Ω
S-video-C:0.286 V(p-p)/75 Ω
Tuner section Tuning Range FM:87.5 MHz to 108.0 MHz
AM:530 kHz to 1 710 kHz
General Power Requirements AC 120 V, 60 Hz
Power Consumption 16 W (at operation)
1.3 W (in standby mode)
Dimensions (W×H×D) 400 mm × 85 mm × 399 mm
(15-3/4 inches × 3-3/8 inches ×15-3/4 inches)
Mass 4.2 kg (9.3 lbs)
*1: This value is measured at System cord CONNECTOR for reference.
*2: Corresponding to Linear PCM, Dolby Digital, and DTS DigitalSurround (with sampling frequency -32 kHz, 44.1 kHz, 48 kHz)
Subwoofer (SP-PWC5)
Amplifier section Front/Center/Surround 167 W per channel, RMS at 3 Ω at 1kHz, with 10 % total harmonic distortion.
Subwoofer 167 W, RMS at 3 Ω at 100 Hz, with 10 % total harmonic distortion.
Speaker section Speaker unit 25 cm (9-7/8 inches) Bass-reflex
Power Handling Capacity 170 W
Impedance 3Ω
Frequency Range 25 Hz to 200 Hz
General Power Requirements AC 120 V , 60 Hz
Power Consumption 160 W (at operation)
0 W (in standby mode)
Dimensions (W × H × D) 264 mm × 481 mm ×459 mm
(10-7/16 inches × 18-15/16 inches × 18-1/8 inches)
Mass 16.5 kg (37 lbs)
1-2 (No.MB362)
Satellite Speakers (SP-XTHC5)
Front speakers (SP-THC5F) Speaker unit 5.5 cm (2-3/16 inches) × 2
Bass-reflex, Magnetically Shielded
Power Handling Capacity 170 W
Impedance 3Ω
Frequency Range 95 Hz to 20 kHz
Dimensions (W × H ×D) 230 mm × 1 103.5 mm × 285 mm
(9-1/16 inches × 43-1/2 inches × 11-5/16 inches)
Mass: 3.5 kg (7.8 lbs) each
Center speaker (SP-THC5C) Speaker unit 5.5 cm (2-3/16 inches) × 2
Bass-reflex, Magnetically Shielded
Power Handling Capacity 170 W
Impedance 3Ω
Frequency Range 90 Hz to 20 kHz
Dimensions (W × H × D) 320 mm × 75 mm × 92 mm
(12-5/8 inches × 3 inches × 3-5/8 inches)
Mass 0.90 kg (2.0 lbs)
Surround speakers (SP-THC5S) Speaker unit 8.0 cm (3-3/16 inches)
Bass-reflex
Power Handling Capacity 170 W
Impedance 3Ω
Frequency Range 80 Hz to 20 kHz
Dimensions (W × H × D) 111.5 mm × 148 mm × 106.5 mm
(4-7/16 inches × 5-7/8 inches ×4-1/4 inches)
Mass 0.44 kg (0.97 lbs) each
Designs & specifications are subject to change without notice.
(No.MB362)1-3
SECTION 1
PRECAUTION
1.1 Safety Precautions
(1) This design of this product contains special hardware and
many circuits and components specially for safety purposes. For continued protection, no changes should be made
to the original design unless authorized in writing by the
manufacturer. Replacement parts must be identical to
those used in the original circuits. Services should be performed by qualified personnel only.
(2) Alterations of the design or circuitry of the product should
not be made. Any design alterations of the product should
not be made. Any design alterations or additions will void
the manufacturers warranty and will further relieve the
manufacture of responsibility for personal injury or property
damage resulting therefrom.
(3) Many electrical and mechanical parts in the products have
special safety-related characteristics. These characteristics are often not evident from visual inspection nor can the
protection afforded by them necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special
safety characteristics are identified in the Parts List of Service Manual. Electrical components having such features
are identified by shading on the schematics and by ( ) on
the Parts List in the Service Manual. The use of a substitute
replacement which does not have the same safety characteristics as the recommended replacement parts shown in
the Parts List of Service Manual may create shock, fire, or
other hazards.
(4) The leads in the products are routed and dressed with ties,
clamps, tubings, barriers and the like to be separated from
live parts, high temperature parts, moving parts and/or
sharp edges for the prevention of electric shock and fire
hazard. When service is required, the original lead routing
and dress should be observed, and it should be confirmed
that they have been returned to normal, after reassembling.
(5) Leakage shock hazard testing
After reassembling the product, always perform an isolation check on the exposed metal parts of the product (antenna terminals, knobs, metal cabinet, screw heads,
headphone jack, control shafts, etc.) to be sure the product
is safe to operate without danger of electrical shock.Do not
use a line isolation transformer during this check.
• Plug the AC line cord directly into the AC outlet. Using a
"Leakage Current Tester", measure the leakage current
from each exposed metal parts of the cabinet, particularly any exposed metal part having a return path to the
chassis, to a known good earth ground. Any leakage current must not exceed 0.5mA AC (r.m.s.).
• Alternate check method
Plug the AC line cord directly into the AC outlet. Use an
AC voltmeter having, 1,000Ω per volt or more sensitivity
in the following manner. Connect a 1,500Ω 10W resistor
paralleled by a 0.15µF AC-type capacitor between an ex-
posed metal part and a known good earth ground.
Measure the AC voltage across the resistor with the AC
voltmeter.
Move the resistor connection to each exposed metal
part, particularly any exposed metal part having a return
path to the chassis, and measure the AC voltage across
the resistor. Now, reverse the plug in the AC outlet and
repeat each measurement. Voltage measured any must
not exceed 0.75 V AC (r.m.s.). This corresponds to 0.5
mA AC (r.m.s.).
AC VOLTMETER
(Having 1000
ohms/volts,
or more sensitivity)
0.15 F AC TYPE
Place this
probe on
1500 10W
Good earth ground
1.2 Warning
(1) This equipment has been designed and manufactured to
meet international safety standards.
(2) It is the legal responsibility of the repairer to ensure that
these safety standards are maintained.
(3) Repairs must be made in accordance with the relevant
safety standards.
(4) It is essential that safety critical components are replaced
by approved parts.
(5) If mains voltage selector is provided, check setting for local
voltage.
1.3 Caution
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.
1.4 Critical parts for safety
In regard with component parts appearing on the silk-screen
printed side (parts side) of the PWB diagrams, the parts that are
printed over with black such as the resistor ( ), diode ( )
and ICP ( ) or identified by the " " mark nearby are critical
for safety. When replacing them, be sure to use the parts of the
same type and rating as specified by the manufacturer.
(This regulation dose not Except the J and C version)
each exposed
metal part.
1-4 (No.MB362)
1.5 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.
1.5.1 Grounding to prevent damage by static electricity
Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as 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 palate
(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.
1.6 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) I t is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it.
1.7 Attention when traverse unit is decomposed
*Please refer to "Disassembly method" in the text for the pickup unit.
• Apply solder to the short land sections before the flexible wire is disconnected from the connecto on the servo board. (If the flexible
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 sections after connecting the flexible wire.
DVD pickup
DVD changer mechanism assembly
(No.MB362)1-5
1.8 Importance administering point on the safety
Power supply board
(Center unit)
Mother board
(Subwoofer)
1-6 (No.MB362)
Caution: For continued protection against risk of fire,
replace only with same type 1.6 A/125 V for F901,
8A/125V for F101,10 A/125 V for F153 and F154.
This symbol specifies the type of fast operating fuse.
Precaution: Pour la protection continue contre les
risques d'incendie, remplacer uniquement par le
^
meme type: fusible 1.6 A/125 V pour le F901,
8A/125V pour le F101,10 A/125 V pour le F153 et F154.
Ce symbole specifie le type de fusible a action rapide.
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.
(No.MB362)1-7
SECTION 3
r
DISASSEMBLY
3.1 Main body section
3.1.1 Removing the metal cover
(See Figs. 1 to 4)
(1) From the both sides of the main body, remove the four
screws A attaching the metal cover. (See Figs. 1 and 2.)
(2) From the back side of the main body, remove the three
screws B attaching the metal cover. (See Fig. 3.)
(3) Lift the rear section of the metal cover in the direction of the
arrow while extending the lower sections of the metal cover, release the seven claws a using a longer screwdriver
from the inside as required. (See Fig. 4.)
Note:
Do not damage any parts and boards inside the main body
when releasing the claws a using a longer screwdriver.
Metal cover
A
Fig.1
Metal cover
B
A
Fig.2
Metal cove
Fig.3
Metal cover
Claws aClaws a
1-8 (No.MB362)
Fig.4
3.1.2 Removing the front panel assembly
(See Figs. 5 and 6)
• Prior to performing the following procedures, remove the metal
cover.
(1) From the top side of the main body, disconnect the parallel
wires from the connectors (CN456
board. (See Fig. 5.)
(2) Disconnect the card wires from the connectors (CN450
) on the main board. (See Fig. 5.)
CN460
(3) Remove the screw C attaching the earth wires to the main
board. (See Fig. 5.)
Reference:
When attaching the screw C, attach the earth wires with
it. (See Fig. 5.)
(4) From the bottom side of the main body, remove the three
screws D attaching the front panel assembly. (See Fig. 6.)
(5) From the both and bottom sides of the main body, remove
the front panel assembly in the direction of the arrow while
releasing the joints b and c. (See Fig. 6.)
, CN457) on the main
,
Front panel assembly
Main board
Card wire
CN457
CN450
CN456
Parallel wires
C
Earth
wires
CN460
Card wire
Front panel assembly
Fig.5
Joint c Joint bJoint b
D
Fig.6
(No.MB362)1-9
3.1.3 Removing the DVD changer mechanism assembly
(See Fig. 7)
• Prior to performing the following procedures, remove metal
cover and front panel assembly.
(1) From the top side of the main body, remove the screw E at-
taching the wire protection board to the main board.
(2) Take out the wire protection board, and disconnect the
card wires from the connectors (CN401
main board.
Reference:
When attaching the wire protection board, attach the
wire protection board after connecting the card wires to
the connectors (CN401
(3) Remove the four screws F attaching the DVD changer
mechanism assembly on the bottom chassis.
(4) Take out the DVD changer mechanism assembly in the up-
ward direction.
Reference:
When attaching the DVD changer mechanism assembly, align
the holes of the DVD changer mechanism assembly to the projections d on the bottom chassis.
3.1.4 Removing the rear panel
(See Fig. 8)
• Prior to performing the following procedures, remove the metal
cover.
(1) From the back side of the main body, remove the screw G
and eleven screws H attaching the rear panel.
to CN403) on the main board.
to CN403) on the
F
DVD changer mechanism assembly
Projections d
Wire protection board
F
G
F
E
Fig.7
CN402
Card wires
CN401
Bottom
chassis
CN403
Main
board
H
H
Rear panel
Fig.8
1-10 (No.MB362)
3.1.5 Removing the audio & digital input board
(See Figs. 9 and 10)
• Prior to performing the following procedures, remove the metal
cover.
(1) From the top side of the main body, disconnect the card
wires from the connectors (CN411
board. (See Fig. 9.)
(2) Remove the screw J attaching the earth wires to the main
board. (See Fig. 9.)
Reference:
When attaching the screw J, attach the earth wires with
it. (See Fig. 9.)
(3) From the back side of the main body, remove the screw K
and two screws L attaching the audio & digital input board
to the rear panel. (See Fig. 10.)
(4) Move the audio & digital input board in the direction of the
arrow, and release the claw e of bracket board. (See Fig.
9.)
(5) Take out the audio & digital input board from the main
body.
3.1.6 Removing the tuner
(See Figs. 9 and 10)
• Prior to performing the following procedures, remove the metal
cover.
(1) From the top side of the main body, disconnect the card
wire from the connector CN1
(2) From the back side of the main body, remove the two
screws M attaching the tuner to the rear panel. (See Fig.
10.)
(3) Take out the tuner from the main body.
3.1.7 Removing the power supply board
(See Figs. 9 and 10)
• Prior to performing the following procedures, remove the metal
cover.
(1) From the top side of the main body, disconnect the parallel
wires from the connectors (CN404
board. (See Fig. 9.)
(2) Remove the three screws N attaching the power supply
board. (See Fig. 9.)
(3) From the back side of the main body, remove the screw P
attaching the power supply board to the rear panel. (See
Fig. 10.)
(4) Take out the power supply board from the main body.
Reference:
Remove the rear panel as required. (See "3.1.4 Removing the
rear panel")
, CN412) on the main
on the tuner. (See Fig. 9.)
to CN407) on the main
Main board
Card wires
Earth
wire
CN412
CN411
J
Bracket
board
Craw e
CN407
CN406
CN1
Card wire
Audio & digital input board
KP
CN405
Tuner
ML
N
Power supply board
N
CN404
Parallel wires
Fig.9
Rear panel
Fig.10
(No.MB362)1-11
3.1.8 Removing the main board
(See Fig. 11)
• Prior to performing the following procedures, remove the metal
cover, rear panel, audio & digital input board and tuner.
(1) From the top side of the main body, remove the screw Q
attaching the bracket board and take the bracket board.
(2) Remove the screw R and screw R' attaching the main
board on the bottom chassis.
Reference:
When attaching the screw R', attach the wire protection
board with it.
(3) Take out the wire protection board, and disconnect the
card wires from the connectors (CN401
main board.
Reference:
When attaching the wire protection board, attach the
wire protection board after connecting the card wires to
the connectors (CN401
(4) Disconnect the card wires from the connectors (CN450 and
) on the main board.
CN460
(5) Disconnect the parallel wires from the connectors (CN404
to CN407, CN456 and CN457) on the main board.
(6) Take out the main board from the main body.
to CN403) on the main board.
to CN403) on the
CN460
Bracket
board
Q
R
CN450
CN456
CN457
Wire protection board
CN402CN401
R'
CN406
CN403
Main board
CN407
CN404
Fig.11
CN405
Bottom chassis
1-12 (No.MB362)
3.2 Front panel assembly section
• Prior to performing the following procedures, remove the front panel assembly from the main body. (See "Removing the front panel
assembly")
3.2.1 Removing the phone jack board
(See Fig. 1)
(1) From the inside of the front panel assembly, remove the
screw A attaching the phone jack board.
(2) Take out the phone jack board from the front panel assem-
bly.
3.2.2 Removing the bracket board
(See Fig. 1)
(1) From the inside of the front panel assembly, remove the
two screws B attaching the bracket board.
Reference:
When attaching the connect board, align the projections
of the bracket board to the slots a and b of the front panel
assembly.
(2) Take out the bracket board from the front panel assembly.
3.2.3 Removing the operation board
(See Fig. 2)
• Prior to performing the following procedures, remove the
bracket board.
(1) From the inside of the front panel assembly, remove the
three screws C attaching the operation board.
Reference:
When attaching the operation board, align the projections c of the front panel assembly to the holes of the operation board.
(2) Take out the operation board.
3.2.4 Removing the power key board
(See Fig. 2)
• Prior to performing the following procedures, remove the
bracket board.
(1) From the inside of the front panel assembly, remove the
two screws D attaching the power key board.
(2) Take out the power key board and remove the solder from
the soldered point d to remove the parallel wire.
Headphone board
A
Projections c
Operation board
Slot b
Slot a
BB
Bracket board
Fig.1
Solder section d
Fig.2
Front panel assembly
DC
Power key board
Front panel assembly
(No.MB362)1-13
3.2.5 Removing the front board
e
(See Figs. 3 and 4)
• Prior to performing the following procedures, remove the
phone jack board, bracket board and operation board.
(1) From the front side of the front panel assembly, pull out the
volume knob in the direction of the arrow. (See Fig. 3.)
(2) From the inside of the front panel assembly, remove the six
screws E attaching the front board. (See Fig. 4.)
(3) Take out the front board and remove the solder from the
soldered point e to remove the parallel wire. (See Fig. 4.)
Front panel assembly
Volume knob
Fig.3
E
Front board
Front panel ass
Solder section e
Fig.4
1-14 (No.MB362)
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