JVC EX-A1, EX-A5, EX-P1 Service Manual
SERVICE MANUAL
COMPACT COMPONENT SYSTEM
MB34820052
EX-A1,EX-P1,EX-A5
EX-A1
Area suffix
US ------------------------ Singapore
UB ---------------------- Hong Kong
UF ------------------------------ China
UP ----------------------------- Korea
UT ---------------------------- Taiwan
UW ----------- Brazil,Mexico,Peru
(SP-EXA1)
(SP-EXP1)
(CA-EXA1)
(CA-EXP1)
(SP-EXA1)
(SP-EXP1)
UJ ---------------------- U.S.Military
EX-P1
Area suffix
UF ------------------------------ China
UP ----------------------------- Korea
UT ---------------------------- Taiwan
UJ ---------------------- U.S.Military
EX-A5
(CA-EXA5) (SP-EXA5)(SP-EXA5)
EX-A1
Speaker 1-way bass-reflex type
8cm wood cone x1
EX-P1 EX-A5
1-way bass-reflex type
8cm wood cone x1
UT ---------------------------- Taiwan
2-way bass-reflex type
11cm wood cone x1
2cm wood cone x1
Area suffix
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28
COPYRIGHT © 2005 Victor Company of Japan, Limited
No.MB348
2005/2
SPECIFICATION
COMPACT COMPONENT SYSTEM (EX-A1,EX-P1,EX-A5)
General Power source AC 110 - 240 V , 50 Hz/60 Hz (EX-A1, EX-P1)
AC 110 V for Taiwan (EX-A5)
Power consumption 24 W (in operation)
1.1 W (on standby)
Weight 3.0 kg
External dimensions (W × H × D) 232 mm × 100 mm × 269 mm
DVD player Playable discs DVD VIDEO, DVD AUDIO, VCD, Super VCD, CD,
CD-R/RW (CD, VCD, MP3, JPEG format), DVD-R/RW (video format)
Video output Color system NTSC(EX-A1, EX-P1)
NTSC/PAL selectable (EX-A5)
Horizontal resolution 500 lines
Composite × 1 1.0 V (p-p)/75 Ω, synchronization negative
S-video × 1 Y output: 1.0 V (p-p)/75 Ω, synchronization negative
C output: 0.286 V (p-p)/75 Ω
Component × 1 Y output: 1.0 V (p-p)/75 Ω
PB/PR output: 0.7 V (p-p)/75 Ω
Audio output Analog sound output Speakers × 2 60 W (30 W + 30 W) at 4 Ω (10% THD)
Output power (IEC 268-3) Fitting impedance: 4 Ω to 16 Ω
Headphones × 1 11 mW/32 Ω
Fitting impedance 16 Ω to 1 kΩ
Subwoofer × 1 500 mVrms/10 kΩ
Digital sound output Optical × 1 -21 dBm to -15 dBm
Other output AV COMPU LINK × 2 (Ø3.5)
Audio input Sound input AUX × 1
Level 1 250 mV/50 kΩ
Level 2 500 mV/50 kΩ
Tuner FM tuner Receiving frequency 87.50 MHz to 108.00 MHz
Antenna 75Ω- unbalanced type
AM tuner Receiving frequency 531 kHz to 1710 kHz (at 9 kHz interval space)
530 kHz to 1710 kHz (at 10 kHz interval space)
Antenna External antenna jack (loop antenna)
SPEAKER (SP-EXA1/SP-EXP1)
Type 1-way bass-reflex type Magnetically shielded type
Speaker 8cm cone × 1
Power handling capacity 30 W
Impedance 4Ω
Sound pressure level 81 dB/W m (SP-EXA1)
82 dB/W m (SP-EXP1)
Dimension (W × H × D) 120 mm × 161 mm × 239 mm
Weight (1 unit) 1.6 kg (SP-EXA1)
1.9 kg (SP-EXP1)
SPEAKER (SP-EXA5)
Type 2-way bass-reflex type Magnetically shielded type
Speaker Woofer : 10.5 cm wood cone
Tweeter : 2 cm wood cone
Power handling capacity 100 W
Impedance 4Ω
Crossover frequency 3.5 kHz
Sound pressure level 80.5 dB/W m
Dimension (W × H × D) 143 mm × 257 mm × 243 mm
Weight (1 unit) 3.5 kg
Designs and Specifications are subject to change without notice.
1-2 (No.MB348)
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.
(No.MB348)1-3
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.
Short land section
pickup
1-4 (No.MB348)
Card wire
Traverse mechanism assembly
1.8 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
laser radiation when open and
interlock failed or defeated.
AVOID DIRECT EXPOSURE TO
BEAM. (e)
CLASS 1
LASER PRODUCT
ADVARSEL : Synlig og usynlig
laserstråling når maskinen er
åben eller interlocken fejeler.
Undgå direkte eksponering til
stråling. (d)
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)
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)
VARO : Avattaessa ja suojalukitus
ohitettuna tai viallisena olet alttiina
näkyvälle ja näkymättömälle
lasersäteilylle. Vältä säteen
kohdistumista suoraan itseesi. (f)
(No.MB348)1-5
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.
1-6 (No.MB348)
SECTION 3
DISASSEMBLY
3.1 Main body section
3.1.1 Removing the top cover
(See Fig.1)
(1) From the top side of the main body, remove the four screws
A attaching the top cover.
A A
Top cover
Fig.1
A
(No.MB348)1-7
3.1.2 Removing the AL panel L and AL panel R (
A
See Figs.2 to 7.)
• Remove the top cover.
(1) Remove the two screws B, screw C and screw C' attaching
the bridge A. (See Fig.2.)
Reference:
When attaching the screw C' attach the lug wire with it.
(See Fig.2.)
(2) Remove the two screws C attaching the bridge B. (See
Fig.2.)
(3) Remove the two screws C' attaching the bridge C. (See
Fig.2.)
(4) From the back side of the main body, remove the three
screws D attaching the bridge C. (See Fig.3.)
Reference:
When attaching the screws C' attach the lug wires with
it. (See Fig.2.)
(5) From the top side of the main body, remove the two screws
E attaching the AL panel L and AL panel R. (See Fig.4.)
(6) From the bottom side of the main body, remove the three
screws F attaching the wood bar. (See Fig.5.)
(7) Remove the six screws G and two screws H attaching the
AL panel L and AL panel R. (See Fig.6.)
(8) Remove the AL panel L and AL panel R in the direction of
the arrow 2 while extending the back section of the AL panel L and AL panel R in the direction of the arrow 1. (See
Fig.7.)
C'
C
C'
D
Lug wires
Fig.2
Bridge C
BBridge A
Bridge B
C'
C
C
Lug wire
1-8 (No.MB348)
L panel L
Fig.3
AL panel R
E
Fig.4
Wood ba
r
111 111
F
Fig.5
2 2
Fig.7
GG
AL panel LAL panel R
AL panel R
H H
AL panel L
Fig.6
(No.MB348)1-9
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