JVC UX-P30 User manual

SERVICE MANUAL
COPYRIGHT © 2003 VICTOR COMPANY OF JAPAN, LIMITED No.MB049
2003/11
MICRO COMPONENT SYSTEM
MB049200311 UX-P30
TABLE OF CONTENTS
1 Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25
CA-UXP30
SLEEP
STANDBY/ON
AUX
FM/AM
TAPE
CD
DISPLAY
REPEATRANDOMPROG
FM MODE
AUTO
PRESET
SOUND
MODE
CD
CANCEL MULTI KEY SET
PTY
/EON
DISPLAY
MODE
RM-SUXP3R REMOTE CONTROL
VOLUME
AHB
V
O
L
U
M
E
MICRO COMPONENT SYSTEM UX-P30
STANDBY
CLOCK TIMER
CD
/
TAPE
FM/AM AUX
+
Ð
PHONES
REV.MODE
AHB PRO
SOUND
REC
CD-R/RW PLAYBACK
SP-UXP30 SP-UXP30
Area Suffix
B --------------------------- U.K.
E ------- Continental Europe
EN --------- Northern Europe

1-2 (No.MB049)
SPECIFICATION
Design and specifications are subject to change without notice.
Amplifier Output Power 44 W (22 W + 22 W) at 4 Ω(MAX.)
40 W (20 W + 20 W) at 4 Ω(10 % THD)
Audio input sensitivity/Impedance (at 1 kHz) AUX : 400 mV/48 kΩ
Speakers/Impedance 4 Ω- 16 Ω
Tuner FM tuning range 87.50 MHz - 108.00 MHz
AM (MW) tuning range 522 kHz - 1 629 kHz
CD player Dynamic range 85 dB
Signal-to-noise ratio 90 dB
Wow and flutter Immeasurable
Cassette deck Frequency response Normal (type I) : 50 Hz - 14 000 Hz
Wow and flutter 0.15 % (WRMS)
Speaker Speaker units Woofer : 8 cm cone ×1
Tweeter : 2 cm cone ×1
Impedance 4 Ω
Dimensions (approx.) 160 mm ×256 mm ×197 mm (W/H/D)
Mass (approx.) 2.1 kg each
General Power requirement AC 230 V, 50 Hz
Power consumption 50 W (at operation)
3.8 W (on standby)
Dimensions (approx.) 505 mm ×256 mm ×294 mm (W/H/D)
Mass (approx.) 8.5 kg

(No.MB049)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 purpos-
es. 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 per-
formed 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 characteris-
tics are often not evident from visual inspection nor can the
protection afforded by them necessarily be obtained by us-
ing replacement components rated for higher voltage, watt-
age, etc. Replacement parts which have these special
safety characteristics are identified in the Parts List of Ser-
vice 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 charac-
teristics 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 reassem-
bling.
(5) Leakage shock hazard testing
After reassembling the product, always perform an isola-
tion check on the exposed metal parts of the product (an-
tenna 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, particular-
ly any exposed metal part having a return path to the
chassis, to a known good earth ground. Any leakage cur-
rent 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, 1,000Ωper volt or more sensitivity
in the following manner. Connect a 1,500Ω10W 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.).
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 pre-
forming 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)
Good earth ground
Place this
probe on
each exposed
metal part.
AC VOLTMETER
(Having 1000
ohms/volts,
or more sensitivity)
0.15 F AC TYPE

1-4 (No.MB049)
1.5 Safety Precautions (U.K only)
(1) This design of this product contains special hardware and many circuits and components specially for safety purposes. For con-
tinued protection, no changes should be made to the original design unless authorized in writing by the manufacturer. Replace-
ment parts must be identical to those used in the original circuits.
(2) Any unauthorised design alterations or additions will void the manufacturer's guarantee; furthermore the manufacturer cannot
accept responsibility for personal injury or property damage resulting therefrom.
(3) Essential safety critical components are identified by ( ) on the Parts List and by shading on the schematics, and must never
be replaced by parts other than those listed in the manual. Please note however that many electrical and mechanical parts in
the product have special safety related characteristics. These characteristics are often not evident from visual inspection. Parts
other than specified by the manufacturer may not have the same safety characteristics as the recommended replacement parts
shown in the Parts List of the Service Manual and 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 re-assembling.
1.5.1 Warning
(1) Service should be performed by qualified personnel only.
(2) This equipment has been designed and manufactured to meet international safety standards.
(3) It is the legal responsibility of the repairer to ensure that these safety standards are maintained.
(4) Repairs must be made in accordance with the relevant safety standards.
(5) It is essential that safety critical components are replaced by approved parts.
(6) If mains voltage selector is provided, check setting for local voltage.
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.MB049)1-5
1.6 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.
1.6.1 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.
1.7 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.
1.8 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 sections before the flexible wire is disconnected from the connector CN101 on the CD servo board.
(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 sections after connecting the flexible wire.
1M
Conductive material
(conductive sheet) or iron palate
(caption)
Anti-static wrist strap
C
D SERVO board CD SERVO board
Soldering pa
rt
CN601
CN60
1
C601
C602 C603 C604
C605 C606
C607
C610
C611
C612
C613
C614
C615
C616
C617
C619 C620
C621
C622
C623
C624
C631
C632
C633
C641 C642
C643
B619
C651 C652
C653
C654
C655
C656
C657
C658
C661
C663
C664 C665
C667 C668
C669
C670
C671
C672
C673
C676
C677
C679
C680
C691
C692
C693
C694
C695
C696
C699
C801
C802
C811
C812
C813
C814
C815
C821 C822
C823
C824
C831
C832
C833
CN601
CN651 CN652
CN801
D831
R648
IC652
IC801
IC802
L831
Q631
Q801
R601
R602
R603 R604
R605 R606 R610 R611
R612 R613 R617
R618 R619
R620
R621
R631
R632
R634 R635
R636
R641 R642 R643
R647
R651 R652
R653
R654
R655 R656
R657 R658 R659
R661
R662
R663 R664
R665
R666
R667
R668
R669
R670
R682
R683
R685
R691
R692
R695 R696
R701
R702
R703
R704
R705
R706
R707
R708
R709
R710
R801 R802
R803 R804
R805 R806
R807 R808 R809
R812
R821
R822
R823
R824
R831
W605
CN606
X651
B604
B616
B614
R813
C816
B613
B615
B610
B612
B617
B618
IC601
R607
B601
B603
B602
B611
B609
B608
B607 B606
B605
D601
D602
R681
C681
R684
MUTE
FLAG
CDDG
BLKCK
/REST
MLD
MDATA
MCLK
CDDG
SUBQ
SQCK
/RST
STAT
FM+
REST
SM-
SM+
D.GND
FM-
1
1
1
1
1
BE
BE
C
31
6
ARF
A.GND
F- T- T+ F+ GND VR LD MD T2 K F1 NC T1 SR F2
115
T02
SCD
SCD
CDDG
13
LM+
OPSW
GND
CLSW
LM-
M.GND
SW10
SW10
CLOSE
OPEN
OPSW
CLSE
CD+B
CD+B
CDL
A.GND
A.GND
CDR
51
116
1
21
41
61
17
16
32
12
24
13

1-6 (No.MB049)
1.9 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 compact disc 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 de
feated. 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 herein may result in
hazardous radiation exposure.
REPRODUCTION AND POSITION OF LABEL 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

(No.MB049)1-7
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.

1-8 (No.MB049)
SECTION 3
DISASSEMBLY
3.1 Main body
3.1.1 Removing the metal cover
(See Fig.1 and 2)
(1) Remove the six screws Aon the back of the body.
(2) Remove the two screws Bon the side of the body.
(3) Pull both sides of the metal cover outward and lift the rear
part of the cover.
Fig.1
Fig.2
3.1.2 Removing the rear cover
(See Fig.3)
• Prior to performing the following procedure, remove the metal
cover.
(1) Remove the two screws Con the back of the body.
Fig.3
A
A
A
A
A
Metal cover
Metal cover
B x2
C
Rear cover
Rear panel
C

(No.MB049)1-9
3.1.3 Removing the tuner board
(See Fig.4 and 5)
• Prior to performing the following procedure, remove the metal
cover.
(1) Disconnect the card wire from connector CN1 on the tuner
board.
(2) Remove the screw Don the right side of the body.
(3) Remove the two screws Eon the rear panel.
Fig.4
Fig.5
DCN1 Tuner board
E
Rear cover
Rear panel

1-10 (No.MB049)
3.1.4 Removing the CD mechanism assembly
(See Fig.6 to 8)
• Prior to performing the following procedure, remove the metal
cover and the rear cover.
(1) Disconnect the card wires from connector CN903, CN904
on the main board on the upper side of the body.
(2) Remove the screw Dattaching the tuner board and the CD
mechanism on the right side of the body.
(3) Remove the two screws Fattaching the rear panel and the
CD mechanism on the back of the body.
(4) Move the rear part of the CD mechanism assembly
upwards to disengage the two joints aand release from the
rear panel. Pull the front panel toward the front and move
the rear part of the CD mechanism assembly upwards.
Then pull out the CD mechanism assembly from the front
panel backward.
REFERENCE:
To remove the CD mechanism assembly efficiently,
disconnect the card wireconnecting the tuner board with the
main board in advance.
Fig.6
Fig.7
Fig.8
Front panel assembly CD mechanism assembly
Tuner board
Main board
CN904
Card wires
CN903
Rear panel
D
Front panel assembly
CD mechanism assembly
Tuner board
F
G
G
Rear panel
Joint a
Joint a
G

(No.MB049)1-11
3.1.5 Remove the rear panel
(See Fig.8 to 10)
• Prior to performing the following procedure, remove the metal
cover, rear cover and the CD mechanism assembly.
(1) Remove the five screws Gattaching the rear panel.
(2) Disconnect the card wire from CN902 on the main board.
(3) Disengage the lower two joints bon each side of the rear
panel using a screwdriver and remove the rear panel
backward (The tuner board and the fan will be also
detached.Remove them as needed).
Fig.9
Fig.10
Joint b
Rear panel
Rear panel
Joint b

1-12 (No.MB049)
3.1.6 Removing the main board / heat sink
(See Fig.11 to 13)
• Prior to performing the following procedure, remove the metal
cover, the rear cover, the CD mechanism assembly and the
rear panel.
(1) Disconnect the card wire from connector CN900, CN901
and CN931 on the main board.
(2) Disconnect the wire from CN906 and CN907 respectively.
(3) Remove the two screws Hattaching the main board to the
chassis on the left side ofthe body and disengage the two
joints c.
(4) Remove the two screws Jattaching the heat sink to the
main board.
Fig.11
Fig.12
Fig.13
CN931
CN901
CN900
Main board
CN906
CN907
HH
Joint c
Front panel assembly
Main board
Heat sink
Main board
J

(No.MB049)1-13
3.1.7 Removing the power transformer assembly
(See Fig.14 and 15)
• Prior to performing the following procedure, remove the metal
cover, the rear cover, the CD mechanism assembly and the
rear panel.
(1) Removethecordstopperupwardsontheback of the body.
(2) Disconnect the power cord from connector J1000 on the
board of the power transformer assembly.
(3) Disconnect the wire from connector FW903 on the main
board.
(4) Remove the four screws Kattaching the power transformer
assembly.
Fig.14
Fig.15
J1000
Power cord Cord stopper
Power transformer
assembly
KJ1000
Power transforme
r
assembly
Main board
CN907
K

1-14 (No.MB049)
3.1.8 Removing the front panel assembly
(See Fig.11, 16 and 17)
• Prior to performing the following procedure, remove the metal
cover, the rear cover, the CD mechanism assembly and the
rear panel.
(1) Disconnect the card wire from connector CN900, CN901
and CN931 on the main board (Refer to Fig.11).
(2) Disconnect the wire from connector CN906 and FW903 on
the main board (Refer to Fig.11).
(3) Remove the two screws Lon each lower side of the body.
(4) Release the lower joints don each side of the body using
a screwdriver. Pull out thefront panel assembly toward the
front.
Fig.16
Fig.17
L
Joint d
Front panel assembly
Main board
L
Joint d
Front panel assembly
Power transformer
assembly
Main board
CN931

(No.MB049)1-15
3.1.9 Removing the display board / switch board
(See Fig.18 to 20)
• Prior to performing the following procedure, remove the front
panel assembly.
(1) Pull out the VOLUME knob on the front panel.
(2) Remove the six screws Mattaching the switch board.
Then, open the switch board in the direction of arrow, and
remove the operation button.
(3) Remove the ten screws Nattaching the Display board and
the two screws Pof the LCD holder.
Fig.18
Fig.19
Fig.20
Front panel assembly
VOLUME knob
MM
Switch board
N
NP
N
Display board
Switch board

1-16 (No.MB049)
3.1.10 Removing the cassette mechanism assembly
(See Fig.21 and 22)
• Prior to performing the following procedure, remove the front
panel assembly.
(1) Press the EJCT button on the front panel to open the
cassette door.
(2) Remove the four screws Ron the back of the front panel.
3.1.11 Removing the headphone board
(See Fig.21)
• Prior to performing the following procedure, remove the front
panel assembly.
(1) Remove the screw Qon the back of the front panel.
Fig.21
Fig.22
RR
Display board
Cassette mechanism assembly Headphone board
R
Q
Switch board
Front panel assembly
EJCT button
Cassette door

(No.MB049)1-17
3.2 Cassette mechanism assembly
3.2.1 Removing the Play/Record & Clear head
(See Fig.1~3)
(1) While moving the trigger arm on the right side of the head
mount in the direction of the arrow, turn the flywheel R
counterclockwise until the head mount comes ahead and
clicks.
(2) The head turns counterclockwise as you turn the flywheel
R counterclockwise (See Fig.2 and 3).
(3) Disconnect the flexible wire from connector CN31 on the
head amplifier & mechanism control board.
(4) Remove the spring from the back of the head.
(5) Loosen the azimuth screw for reversing attaching the head.
(6) Remove the head on the front side of the head mount.
Fig.1
Fig.2
Fig.3
Cassette mechanism assembly Fly wheelR
Trigger armHead mount
Head
Fly wheel R
Azimuth screw
for reversing
Flexible wire Spring
CN31
Head amplifer & mecha control board
Head

1-18 (No.MB049)
3.2.2 Removing the head amplifier & mechanism control board
(See Fig.4)
(1) Turn over the cassette mechanism assembly and remove
the three screws Aattaching the head amplifier & mecha-
nism control board.
(2) Disconnect the flexible wire from connector CN31 on the
head amplifier & mechanism control board.
(3) Disconnect connector CN32 of the head amplifier & mech-
anism control board from connector CN1 on the reel pulse
board.REFERENCE: If necessary, unsolder the 4-pin wire
soldered to the main motor.
3.2.3 Removing the main motor
(See Fig.4~7)
(1) Remove the two screws B.
(2) Half raise the motor and remove the capstan belt from the
motor pulley.
ATTENTION:
Be careful to keep the capstan belt from grease. When reas-
sembling, refer to Fig.6 and 7 for attaching the capstan belt.
Fig.4
Fig.5
Fig.6
Fig.7
Head amplifier & mecha control board
AA
AB
CN31
CN32
4pin wire
Flexible wire
Main motor assembly
Main motor assembly
Capstan belt
Main motor assembly
Capstan belt
Motor pulley
Main motor assembly
Capstan belt
Fly wheel
Motor pulley

(No.MB049)1-19
3.2.4 Removing the flywheel
(See Fig.8, 9)
• Prior to performing the following procedure, remove the head
amplifier & mechanism control board and the main motor as-
sembly.
(1) From the front side of the cassette mechanism, remove the
slit washers attaching the capstan shaft Land R. Pull out
the flywheels backward.
Fig.8
Fig.9
3.2.5 Removing the reel pulse board and solenoid
(See Fig.10)
• Prior to performing the following procedure, remove the head amplifier & mechanism control board.
(1) Remove the screw C.
(2) Release the tab a, b, c, dand eretaining the reel pulse board.
(3) Release the tab fand gattaching the solenoid on the reel pulse board.
(4) The reel pulse board and the solenoid come off.
Fig.10
Fly wheel R Fly wheel L
Capstan shaft R Capstan shaft L
Fly wheel R
Slit washer
Fly wheel L
a
fg
bc d
e
C
Reel pulse board
Solenoid

1-20 (No.MB049)
3.2.6 Reattaching the Play/ Record & Clear head
(See Fig.11~13)
(1) Reattaching the head mount assembly.
a) Change front of the direction cover of the head
mount assembly to the left (Turn the head forward).
b) Fit the bosses O', P', Q', U' and V' on the head mount
assembly to the holes Pand V, the slots O, Uand Q
of the mechanism sub assembly (See Fig.11 to 13).
CAUTION:
To remove the head mount assembly, turn the direction
cover to the left to disengage the gear. If the gear can not
be disengaged easily, push up the boss Q' slightly and
raise the rear side of the head mounts slightly to return
the direction lever to the reversing side.
(2) Tighten the azimuth screw for reversing.
(3) Reattach the spring from the back of the Play/ Record &
Clear head.
(4) Connect the flexible wire to connector CN31 on the head
amplifier & mechanism control board. Fig.11
Fig.12
Fig.13
P' V'
O'
P' V'
U' Q'
Direction cove
r
Head mount assembly
Direction cove
r
Head mount assembly
O
U
VPQ
Azimuth screw for reversing
Head mount
Spring
Flexible wire
Head amplifier &
mechanism control board
CN31
Head