7.5 W per channel, min. RMS, driven into 6Ω at 1kHz, with no more
than 10% total harmonic distortion
Europe :
5 W per channel, min. RMS, driven into 6Ω at 1kHz, with no more than
10% total harmonic distortion (IEC 268-3)
TerminalsInput Sensitivity/
Impedance (1 kHz)
USB Audiover. 1.1
USB Hostver. 1.1
Compatible deviceMass Storage Class
Compatible fi le systemFAT16, FAT32
Bus power supplyMax. 5V/500 mA
Compatible iPod typesiPod nano 1G/2G/4G
Bus power supplyMax. 5V/500 mA
Speaker terminals6 Ω - 16 Ω
Phones32 Ω - 1 kΩ
CD PlayerDynamic Range85 dB
Signal-To-Noise Ratio85 dB
Wow And FlutterUnmeasurable
TunerTuning RangeFM Tuner87.5 MHz - 108.0 MHz
UnitDimensions260 mm × 75 mm × 185 mm (10-1/4" × 3" × 7-5/16") (W/H/D)
MassApprox. 2.1 kg (4.7 lbs)
Speaker Specifi cations
(each unit)
Power Specifi cationsPower RequirementsNortern america : AC 120 V 60 Hz
TypeFull range bass-refl ex type
Speaker Unit8 cm (3-3/16") cone × 1
Power handling Capacity10 W
Impedance6 Ω
Frequency Range135 Hz - 18 kHz
Sound pressure level83 dB/W · m
Dimensions118 mm × 197 mm × 165 mm (4-11/16" × 7-13/16" × 6-1/2") (W/H/D)
MassApprox. 1.3 kg (2.9 lbs)
Power Consumption35 W (power on mode)
AUX INLEVEL1 500 mV/47 kΩ
LEVEL2 125 mV/47 kΩ
iPod mini
iPod (4th Generation) 20G/40G
iPod photo (4th Generation) 20G/30G/40G/60G
iPod video (5th Generation) 30G/60G
15 mW/ch output into 32 Ω
AM TunerNortern america : 530 kHz - 1 710 kHz
Europe : 522 kHz - 1 629 kHz
Europe : AC 230 V 50 Hz
1.5 W (in Standby mode)
Design and specifi cations are subject to change without notice.
1-2 (No.MB576)
SECTION 1
PRECAUTION
1.1Safety 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
1.2Warning
(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.
1.3Caution
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.
1.4Critical 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.MB576)1-3
1.5Importance administering point on the safety
JK201
CN102
X201
RT901
C144
J112
D103
C125
C118
C120
J111
J110
C111
C112
C106
C108
C107
J113
C110
C109
J115
R105
J116
C133
C136
C128
J131
C103
CN103
C105
J101
J102
C145
C143
C148
J105
J106
Q907
D918
C164
J114
R110
J130
D901
CN910
C903
L102
J117
J120
C131
C134
IC902
J122
J118
J119
C135
C126
C129
C130
C104
C916
R905
IC103
D104
C911
C932
C924
J107
J108
Q912
C923
L101
C127
C918
D903
R904
J103
J104
J137
CN104
IC904
PR903
+
-
D907
L104
D922
CN101
J121
L103
IC903
J124
J132
C901
CN912
CN913
Q903
D904
C919
D902
CN901
CN908
R910
L116
J109
D908
J125
D905
J123
D912
R902
L902
C909
PR904
C914
CN909
L117
JK101
R909
PT901
L118
CN903
J128
RY901
CN907
J127
120V
R923
Q901
CN911
C933
R901
C904
D916
D915
230V
D919
J126
C907
D914
D917
J129
J135
J136
L119
FC903F902
L901
FC904
CN902
Full Fuse Replacement Marking
Graphic symbol mark
(This symbol means fast blow type fuse.)
should be read as follows ;
FUSE CAUTION
FOR CONTINUED PROTECTION AGAINST RISK
OF FIRE, REPLACE ONLY WITH SAME TYPE
AND RATING OF FUSES ;
F902 : 400mA 250VF902 : 400mA 250V
fast blow type / type a fusion rapide
Marquage Pour Le Remplacement
Complet De Fusible
Le symbole graphique (Ce symbole signifie
fusible de type a fusion rapide.)
^
doit etre interprete comme suit ;
PRECAUTIONS SUR LES FUSIBLES
POUR UNE PROTECTION CONTINUE CONTRE
DES RISQUES D'INCENDIE, REMPLACER
SEULEMENT PAR UN FUSIBLE DU MEME TYPE ;
1-4 (No.MB576)
1.6Important 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.
!
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 and PRINT
WARNING LABEL and PRINT
(No.MB576)1-5
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.
1-6 (No.MB576)
SECTION 3
DISASSEMBLY
3.1Main body
3.1.1 Removing the Top cabinet assembly
(See Fig.1, 2)
(1) Remove the six screws A attaching the Top cabinet as-
sembly. (See Fig.1)
(2) Disconnect the connector wires from Function board as-
sembly connected to connector CN505
board assembly and disconnect the connector wire from
Door motor board assembly connected to connector
of the CD servo board assembly. (See Fig.2)
CN507
of the CD servo
A
A
Fig.1
CN507
CN505
Fig.2
Function Board
(No.MB576)1-7
3.1.2 Removing the CD mechanism assembly
(See Fig.3, 4)
(1) Disconnect the connector wire from Traverse mechanism
assembly connected to connector CN401 of the CD servo
board assembly. (See Fig.4)
(2) Solder the solder point the flexible wire of the pickup, and
disconnect the flexible wire from the pickup connected to
connector CN402
Fig.4, 3)
CAUTION:
Do not disconnect the flexible wire before soldering, if not soldering pickup be damaged by static electricity.
of the CD servo board assembly. (See
CN402
Fig.3
Solder point
CN401
Fig.4
1-8 (No.MB576)
3.1.3 Removing the CD servo board assembly
(See Fig.5, 6)
(1) Disconnect the card wire from Tuner pack connected to
connector CN504
Fig.5)
(2) Disconnect the card wires from Main board assembly con-
nected to connector CN501
board assembly. (See Fig.5)
(3) Disconnect the connector wire from USB board assembly
connected to connector CN506
sembly. (See Fig.5)
(4) Disconnect the connector wire from Main board assembly
connected to connector CN510
sembly. (See Fig.5)
(5) Disconnect the connector wire from iPod jack board as-
sembly connected to connector CN508
board assembly. (See Fig.5)
(6) Disconnect the connector wire from FL board assembly
connected to connector CN503
sembly. (See Fig.5)
(7) Remove the on screw B attaching the grand wire from CD
servo board attached to Main board assembly. (See Fig.6)
of the CD servo board assembly. (See
and CN502 of the CD servo
of the CD servo board as-
of the CD servo board as-
of the CD servo
of the CD servo board as-
CN504CN501
CN508CN510
Fig.5
CN502
CN506
CN503
B
Fig.6
(No.MB576)1-9
3.1.4 Removing the Center cabinet assembly
(See Fig.7 to 9)
(1) Remove the four screws C attaching the cover. (See Fig.7)
(2) Remove the two screws D attaching the Tuner pack. (See
Fig.7)
(3) Remove the two screws E attaching the speaker jack. (See
Fig.7)
(4) Remove the one screw F attaching the Center cabinet.
(See Fig.8)
(5) Disengage the eight hooks a engaged Center cabinet as-
sembly. (See Fig.9)
F
E
C
CD
E
Fig.7
Fig.8
a
aa
Fig.9
1-10 (No.MB576)
3.1.5 Removing the Power transformer
(See Fig.10)
(1) Disconnect the connector wires from Power transformer
connected to connector CN907
Main board assembly.
(2) Remove the four screws G attaching the Power transform-
er.
, CN908 and CN909 of the
G
CN909
3.1.6 Removing the Main board assembly
(See Fig.11)
(1) Disconnect the connector wires from Front input board as-
sembly board connected to connector CN103
of the Main board assembly.
(2) Remove the three screws H attaching the FL board assem-
bly with USB jack board assembly.
(3) Remove the two screws J attaching the iPod jack board as-
sembly.
(4) Remove the two screws K attaching the Front input board
assembly.
(5) Remove the one screw L attaching the grand wires from FL
board assembly with USB jack board assembly.
(6) Remove the one screws M and one screw N attaching the
Main board assembly.
and CN104
L
G
MN
CN907CN908
Fig.10
CN104CN103
K
K
H
Fig.11
J
(No.MB576)1-11
3.1.7 Removing the Function board assembly
(See Fig.12, 13)
(1) Remove the two screws P attaching the fan. (See Fig.12)
(2) Remove the nine screws Q attaching the Function board
assembly. (See Fig.13)
P
P
Fig.12
Q
Q
Fig.13
1-12 (No.MB576)
3.1.8 Removing the Door motor assembly
(See Fig.14, 15)
(1) Remove the one screw R attaching the Door motor assem-
bly. (See Fig.14)
(2) Remove the four screws S attaching the Door motor as-
sembly. (See Fig.15)
R
Fig.14
S
S
Fig.15
(No.MB576)1-13
SECTION 4
ADJUSTMENT
This service manual does not describe ADJUSTMENT.
1-14 (No.MB576)
SECTION 5
TROUBLESHOOTING
This service manual does not describe TROUBLESHOOTING.
(No.MB576)1-15
Victor Company of Japan, Limited
Audio/Video Systems Category 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan
(No.MB576)
Printed in Japan
VPT
SCHEMATIC DIAGRAMS
MICRO COMPONENT SYSTEM
UX-EP25J,UX-EP25C
UX-EP25E,UX-EP25EN
CD-ROM No.SML2006010
Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)
Contents
Block diagrams
Standard schematic diagrams
Printed circuit boards
COPYRIGHT 2006 Victor Company of Japan, Limited.
CA-UXEP25
SP-UXEP25SP-UXEP25
2-1
2-3
2-11 to 14
No.MB576SCH
2006/10
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.
< MEMO >
5
C
O
3
H
Block diagram
TUNER Pack
IC101
JK302
AUX JK
JK501
iPod JK
JK201
PC USB
JK
U512
FILTER
IC201
DECODE
FUNC
SW+VOL+EQ
U510
ANALOG SW
U508
D/A CONVERT
CD MECHANISM
U402
MOTOR DRIVER
U505
FLASH ROM
U504
SDRAM
U401
CD RF
MP3/WMA DEC
U511
DOOR
MOTOR
U
TC
JK
USB
2-1
IC102
H/P OUT
+EQ
T
AHB_PRO
IC103
POWER
AMP
SP_L
8ohm
SP_R
8ohm
REMOCON
U501
TCC760
ECODER/ENCODER
JK303
SB HOST
U502
EEPROM
KEY
U509
EXTEND IC
VFD1
VFD
P_CON
P-CD
P_TU
P_MUTE
TU_CL
TU_CE
TU_DI
2-2
Standard schematic diagrams
4
4
2
0
1
Primary & Amplifier section
CN101
FFC - 1.25 - 9P
AGND
1
T - 9V
2
DGND
3
SAFETY
4
MOTOR - GND
5
DGND
6
+ 7.5 V
7
M - 5V
8
MGND
9
TO MCU PCB
L101
L103
L104
M16
M14
AUX - R
M - R
+
+
M1
M22
FB
M2
M23
M3
M2
FB
M5
M7
FB
M8
C125
+
2.2 / 50
R105
10
D103
1SS133
4.7 / 50
C109
+
USBA - R
M12
AHB
M9
AHB
OFF
AHBH:L:
ON
R110
+
C118
100 / 16
0.068 (M)
2.2K
C103
C119
C133
2.2 / 50
1
R - IN3
R - IN4
28
0.1
C105
2.2 / 50
2
R - IN2
L - OUT
27
R118
8.2 K
Q101
2SC3052F
M18
TUN - R
+
C107
2.2 / 50
3
R - IN1
R - OUT
26
C128
0.068 (M)
R119
M19
+
C108
4
L - IN1
IC101
AGND
25
4.7K
R120
1K
M17
TUN - L
+
C106
2.2 / 50
5
L - IN2
VS
24
R121
M15
AUX - L
M - L
+
C104
2.2 / 50
2.2 / 50
6
L - IN3
TDA 744 0D
CREF
23
+
C120
10 /16
C129
0.68 (M)
C130
+
100 / 16
1K
M13
+
C110
7
L - IN4
SDA
22
R116
USBA - L
2.2 / 50
8
SCL
21
C168
220K
+
C111
9
IN - L
MUXOUTL
D - GND
20
100P
R117
2.2 / 50
10
MUXOUTR
TRE - R
19
5600P
C121
R122
2.2K
0
C112
+
11
IN - R
TRE - L
18
C122
5600P
2.2 / 50
12
BIN - R
N.C.
17
IC102 - A
3
+
2
-
R123
2.2 K
4
C113
C114
13
BOUT - R
N.C.
16
BA4558F
1
0.1
0.1
C115
R106
14
BIN - L
BOUT - L
15
0.1
5.6 K
M[1:26 ]
C116
C131
+
4.7 / 50
0.1
FF C / FP C
R107
5.6 K
R124
100 K
R166
220 K
R126
10K
CN102
P=1.00 mm
12 P
1
USB A - DEC
M10
M24
M11
M10
SCL
SDA
VER
R158 / R160
C163
R137
2
3
SCL
SCL
M6
M19
TUN- L
C101
C160
1SS355
1 / 10
1.2K
4
5
SDA
MUTE
POWER - ON
M11
M20
M18
M16
M- R
TUN- R
10K
R104
100 P
R160
1.2K
1000P
B / E / EN / EV
5.1K
D105
D106
C143
2.2U / 50V
C140
1800P
TO MCU PCB
8
6
7
9
10
AHB
M -R
M -L
ST BY
AGND
FB
FB
FB
L110
L108
L109
M21
R102
100 P
R158
1000P
1SS355
4. 7K
R103
10K
1.2K
J / C
1.2K
4. 7K
R101
C162
10 / 10
M1
C161
10 / 10
M9
M17
C102
C159
M -L
+
11
TUN- R
FB
L111
4. 7K
R159
DTC11
R168
2SC305
12
FB
L112
4. 7K
R157
Q913
680 K
Q10
TUN- L
TO AUX PCB
CN911
CON- 2.5 - 3P
1
2
3
CN913
CON- 2.5 - 2P
1
2
TO iPod PCB
CN912
CON- 2.5 - 2P
1
2
TO USB PCB
CN901
CON- 2.0 - 4P
1
2
3
4
TO VFD PCB
5V
GND
VFL - GND
VFL
FIL1
FIL2
M8
MCU-GND
M7
MCU- 5V
+ 7.5V
M5
M6
POW -ON
E
C
B
M22
C937
AGND
M1
USB - 5V
USB - GND
DGND
M2
MOTOR - GND
M3
R904
2.2
T - 9V
0.1
J902
C915
R905
2.2
R14
IN
R911
22 K
4A / 125V
R912
22 K
J904
CN908
CN909
IC904
78L08
1
2
7
6
5
4
3
2
1
R167
OUT
GND
2
1K
1K
R14
1K
1
+
C932
47 / 16
Q912
D913
MC2838
1
2
7
6
5
4
3
2
1
IC102 - B
0
C933
C906
+
5
6
R132
2.2 K
R923
330
220 / 10
0.1
+
-
C934
BA4558F
8
0.1
+
C907
7
4700 / 25
R114
R116
220 K
C169
Q911
2SC3052F
D919
C905
1000 / 16
+
5.1V
C914
2.2K
R131
100P
8.2V
0.1
4.7 / 50
R128
R903
C920
0.1
4.7K
10K
1K
R902
+
C909
C134
0.068 (M)
C135
100 / 16
R130
D912
4.7 K
100 / 16
+
1K
1SS133
+
C904
D902
R111
10
0
L102
C117
D922
0.1
C908
L902
FB
+
C901
+
0.1
C916
33 / 50
0.1
1SS133
220 / 10
J901
C917
D903
100 / 16
C126
+
C903
C902
KTC3205
0.01
33V
+
4.7 K
R113
1
470 / 16
IC903
1
OUT
0.1
Q903
C918
7805
+
R112
4.7 K
IC902
7809
OUT
33 / 50
+
100 / 16
C127
2
GND
2
R906
0.1
C170
GND
IN
IN
470
3
3
2SC3052F
+
C919
Q902
33 / 50
R127R129
8.2 K
Q102
2SC3052F
Q901
KTA1273
330
R901
0.1
C921
C138
+
C911
D914
1N4001
D917
1N4001
D915
1N4001
D916
1N4001
+
C136
0.1
D905
1N4001
4700 / 25
D904
1N4003
R165
220 K
R135
10K
4.7 U / 50
R133
R133
100 K
GBU6J
C912
0.1
C928
D908
C927
33
+
0.1
1
R910
R139
2
0.1
1 / 4W
3
1.2K
J903
AC
AC
C910
C142
0.1
PR904
1800P
4
-
C929
0.1
2.5A / 125V
+
2.2U / 50V
PR903
0.1
C913
0.1
C930
AC - AMP1
AC - AMP2
CON - 2.5P - 7P
AC - SYS1
AC - SYS2
AC - VFL1
AC - VFL2
AC - FIL1
FIL - GND
AC -FIL2
C144
3
CON - 2.5 - 2P
2-3
10
TUN- L
1K
1K
Q909
DTC114TK
2SC3052F
MUTE
M20
R169
C923
R913
2.2 K
4.7 K
+
12
11
10
9
8
7
6
5
4
CN103
CON- 2.0 - 4P
1
FB
FB
L114
L113
1K
R153
R154
2K
AGND
AUX-R
M14
M1
M23
M20
C164
SAFETY
MUTE
D918
1SS133
1.5 K
R920
R922
680
470 / 16
10K
C922
R914
230 V
MAIN TRANS
TO AUX PCB
4
3
2
FB
L115
R204
R202
1K
R155
56K
56K
C201
1200P
USBA-R
M12
R916
22K
R144
C124
4.7 K
D104
1SS133
1 / 10
1200P
M1
2
C202
AGND
RT901
R919
C924
R156
2K
AUX-L
M15
+
100 / 16
R921
10K
R915
1K
Q905
0.33
2SC3052F
11
FUSE
2
120 V
3
NC
M13
M21
STBY
Q906
DTA114YK
IC103
LA4636
2.2K
R152
10K
390
+
2200 / 10
CN907
CON - 8 - 2P
R201
4. 7K
R203
4. 7K
USBA-L
+
C145
C925
1
2
10K
4700P
C203
R205
M24
USBA-DEC
DC
1
C146C147
330U / 25V
560P 560P
R917
1K
Q914
DTC114TK
D907
DB102
0.1
2
IC201
4700P
C204
R - IN
1
+
R207
1K
R208
1K
10K
R206
R226
PRE GND
3
R918
3
2
R907
4.7K
10K
L202
0
330
R209
L - IN
4
5
C936
0.01U
AC
4
-
AC
4700P
R908
C205
C207
18
R210
STBY
C926
4.7 K
FB
10 / 6.3
0.022
330
R211
MUTE
6
+
C148
Q907
KAT1273
L203
C206
C208
18
R212
VCC
7
47 / 16
5
6
7
8
9
PCM2704DB
FB
10 / 6.3
100
R228
0.022
R229
L + OUT
8
0.1
C151
2.2
R146
PT901
PT- SUB
R909
33
Q904
2SC3052F
100
9
PRIMARY
Parts are safety assurance parts.
When replacing those parts make
sure to use the specified one.