JVC UX-G45B User manual

SERVICE MANUAL
COPYRIGHT © 2006 Victor Company of Japan, Limited No.MB533
2006/6
MICRO COMPONENT SYSTEM
MB53320066
UX-G45B,UX-G45E,
UX-G45EN,UX-G45EV
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15
CA-UXG45 SP-UXG45SP-UXG45

1-2 (No.MB533)
SPECIFICATION
Design and specifications are subject to change without notice.
Amplifier section Output Power 80 W per channel, min. RMS, driven into 6 Ωat 1 kHz with no more
than 10% total harmonic distortion. (IEC268-3)
Speakers/Impedance 6 Ω- 16 Ω
Audio Input AUX
(Input sensitivity/Impedance)
LEVEL1 : 150 mV/47 kΩ
LEVEL2 : 500 mV/47 kΩ
USB Ver.1.1
Tuner section FM tuning range 87.50 MHz - 108.00 MHz
AM (MW) tuning range 522 kHz - 1 629 kHz
CD player section Dynamic range 85 dB
Signal-to-noise ratio 85 dB
Wow and flutter Immeasurable
General Power requirement AC 230 V , 50 Hz
Power consumption 145 W (at operation)
20 W (on standby)
0.9 W (standby and on Display off)
Dimensions (approx.) 175 mm ×246 mm ×415 mm (W/H/D)
Mass (approx.) 6.2 kg
Speakers Type 2-way Bass reflex
Speaker units Woofer 12 cm cone ×1
Tweeter 4 cm cone ×1
Impedance 6 Ω
Dimensions (approx.) 145 mm ×246 mm ×212 mm (W/H/D)
Mass (approx.) 2.2 kg each

(No.MB533)1-3
SECTION 1
PRECAUTIONS
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)
1500 10W
0.15 F AC TYPE

1-4 (No.MB533)
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.MB533)1-5
1.6 Important 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.
REPRODUCTION AND POSITION OF LABELS 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 and PRINT

1-6 (No.MB533)
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.

(No.MB533)1-7
SECTION 3
DISASSEMBLY
3.1 Main Body
3.1.1 Removing the side panel
(See Fig.1, 2)
(1) Remove the four screws Aattaching the rear cover. (See
Fig.1)
(2) Remove the six screws Battaching the side panel . (See
Fig.1)
(3) Remove the four screws Cattaching the side panel. (See
Fig.2)
Fig.1
Fig.2
A
BB
AAE
CC

1-8 (No.MB533)
3.1.2 Removing the top cover
(See Fig.1, 3)
(1) Remove the four screws Dattaching the top cover and the
side panel. (See Fig.3)
(2) Remove the one screw Eattaching the top cover. (See
Fig.1)
Caution:
When take out the top cover, raise slowly, take care not to
break the two claws of the front panel.
Fig.3
3.1.3 Removing the power trans board
(See Fig.4)
(1) Remove the two screws Fattaching the power trans board.
(2) Disconnect the connector wire from the connector CN103
of the main board.
(3) Disconnect the connector wires from the connectors
CN901, CN902 of the trans board.
Fig.4
D
D
bb
F
CN901
CN902
CN103
Connector wire a

(No.MB533)1-9
3.1.4 Removing the tuner pack
(See Fig.5, 6)
(1) Remove the two screws Gattaching the tuner pack. (See
Fig.5)
(2) Disconnect the card wire from the connector CN351 of the
main board. (See Fig.6)
3.1.5 Removing the fan
(See Fig.5, 6)
(1) Remove the four screws Hattaching the fan. (See Fig.5)
(2) Disconnect the connector wire from the connector CN141
of the main board. (See Fig.6)
3.1.6 Removing the main board
(See Fig.5, 7)
(1) Remove the two screws Jattaching the main board. (See
Fig.5)
(2) Remove the tow screws Kattaching the main board and
the front board. (See Fig.7)
(3) Disconnect the card wires from the connectors CN401,
CN402 of the main board. (See Fig.7)
(4) Disconnect the card wire from the connector CN403 of the
main board. (See Fig.7)
(5) Disconnect the parallel wire from the connector CN502 of
the main board. (See Fig.7)
(6) Disconnect the connector wires from the connectors
CN101, CN102, CN204, CN361 of the main board. (See
Fig.7)
(7) Remove the five screws Lattaching the main board. (See
Fig.7)
(8) (8) Remove the two screws Mattaching the main board
and CD mechanism cover. (See Fig.7)
Fig.5
Fig.6
Fig.7
G
H
H
H
J
J
S
CN351
CN141
CN402
CN401 CN403
K
CN502
CN102
CN101
CN204
M
L
L
L
CN361

1-10 (No.MB533)
3.1.7 Removing the front panel assembly
(See Fig.3, 4, 8, 9)
(1) Pull out the tow connector wires aon the bottom chassis.
(See Fig.4)
(2) Remove the two screws Nattaching the front panel. (See
Fig.8)
(3) Disconnect the connector wire from the connector CN860
of the CD board. (See Fig.9)
(4) Disengage the four hooks bare remove the front panel as-
sembly. (See Fig.3)
Fig.8
Fig.9
N
CN860
R
BN702
BN703
R
R
CN701

(No.MB533)1-11
3.1.8 Removing the CD mechanism assembly
(See Fig.10 to 12)
(1) Remove the four screws Pattaching the CD mechanism
cover and then remove it. (See Fig.10)
(2) Turn the gear cand then undraw the CD tray. (See Fig.11)
(3) Remove the four screws Qattaching the CD mechanism
assembly. (See Fig.12)
Fig.10
Fig.11
Fig.12
P
c
QQ

1-12 (No.MB533)
3.1.9 Removing the CD board
(See Fig.9)
(1) Remove the three screws Rattaching the CD Board.
(2) Disconnect the connector wires connected to the CD
mechanism assembly from the connectors BN702, B703 of
the CD board.
(3) Disconnect the card wire from the connector CN701 of the
CD board.
3.1.10 Removing the rear panel
(See Fig.5, 13)
(1) Remove the one screw Sattaching the rear panel. (See
Fig.5)
(2) Disengage the two hooks dand remove the rear panel.
(See Fig.13)
Fig.13
3.1.11 Removing the power transformer
(See Fig.14)
(1) Remove the four screws Tattaching the power transform-
er.
Fig.14
d
T
T

(No.MB533)1-13
3.1.12 Removing the VFD board
(See Fig.15, 16)
(1) Take out the volume knob. (See Fig.15)
(2) Remove the four screws Uattaching the VFD board. (See
Fig.16)
3.1.13 Removing the key board
(See Fig.16)
(1) Remove the fourteen screws Vattaching the key board.
3.1.14 Removing the jack board
(See Fig.16)
(1) Remove the four screws Wattaching the jack board.
Fig.15
Fig.16
Volume knob
UU
VV
V
V
V
W

1-14 (No.MB533)
SECTION 4
ADJUSTMENT
This service manual does not describe ADJUSTMENT.

(No.MB533)1-15
SECTION 5
TROUBLESHOOTING
This service manual does not describe TROUBLESHOOTING.

(No.MB533)
Audio/Video Systems Category 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan
Victor Company of Japan, Limited
VPT
Printed in Japan

3-1
PARTS LIST
* All printed circuit boards and its assemblies are not available as service parts.
- Contents -
Exploded view of general assembly and parts list (Block No.M1)
Electrical parts list (Block No.01~04)
Packing materials and accessories parts list (Block No.M3)
UX-G45B,UX-G45E,UX-G45EN,UX-G45EV
3-2
3-5
3-12
MB533

3-2
Exploded view of general assembly and parts list
Block No. MM
M
1
Main boa
r
VFD board
Power Trans board
Key board
Jack board
a
18
40
15
11
40
17
18
42
3
2
32
34
40
40
44
5
6
7
8
12
1
14
16
41
14
27
27
54
45
36
20
9
10
1
4
35
35
13
40 31
38
48
53

3-3
M
Main board
CD board
The parts without symbol number are not service.
a
18
18
1
8
30
34
3
2
2
34
51
46
18
24
25
49
18
23
32
45 26
22
39
38
35
27
37
55
35
52
28
18
47
31
52
21
43
33
31
50
18
52
48

3-4
General Assembly
Block No. [M][1][M][M]
 Symbol No. Part No. Part Name Description Local
1 BIKT000606 SCREW (x2)
2 BI3021970101V1 RUBBER FOOT (x4)
3 BIKT000626 SCREW 3xL8(x2)
4 BI1084880101X1 FRONT PANEL
5 BI2031140101X1 CD DOOR SPRING
6 BI372080501BTP SCREW 2.0x5.0(x4)
7 BI1084220101X1 CD BAFFLE
8 BI1084870101X1 CD DOOR
9 BI1080800101V1 VOLUME KNOB ABS-T700 94HB
10 BI1084200101X1 VOLUME RING
11 BI1084230101X1 ILLUMI LENS
12 BI1084210201X1 DISPLAY LENS
13 BI2031160102X1 SIDE PANEL-L
14 BIKT000625P11 SCREW 3xL10(x2)
15 BI1084260101X1 LED HOLDER
16 BI1084250101X1 VFD HOLDER
17 BI2031130101X1 SENSOR HOLDER
18 BIRM000606S3X1 SCREW 3xL6(x21)
20 BI1084240101X1 TOP COVER
21 BI2400261V FAN
22 BIZ25096402VX TUNER PACK TFCG1EA914A
23 BI1084270102X1 TRANS COVER
24 BIPMW001101S SCREW +4-8R X0102282(x4)
25 BI2031090202X1 REAR PANEL T=0.8mm
 26 BI211011146001 POWER TRANS PT902
27 BIRT000608B1W SCREW 3xL8(x4)
28 BI2031150102X1 SIDE PANEL-R
30 BIBT000614B3X1 SCREW 3xL14(x2)
31 BIBT000635S2X1 SCREW 3XL35(x2)
32 BIBT000649 SCREW BT 3X12(x3)
33 BI2031370101X1 BOTTM CHASSIS T=1.0mm
34 BI372130064BTS SCREW 3xL6(x4)
35 BIRT000606S3 SCREW RT 3X8 M(x6)
36 BI2031390101X1 CD MECH HOLDER F T=1.0mm
37 BI2031400101X1 CD MECH HOLDER B T=1.0mm
38 BI1085930101X1 PLASTIC CUSHION (x3)
39 BI671UXG45020 MECHANICAL ASSY
40 BIBT000408S3X1 SCREW 2.6XL8mm(x26)
41 BI1084890101X1 BUTTON
42 BIBT000630S2X1 SCREW 3XL30(x2)
43 BI2031380101X1 CD MECH COVER T=0.8mm
44 BI1084910101X1 PCB BRACKET (x2)
45 BIWPT000601P31 SCREW 3XL8(x2)
46 BI3000271 FIBRE WASHER 3.2x8x0.8(x2)
47 BI2031530101X1 HEAT SINK
48 BI2031520101X1 HEAT SINK BKT
49 BI2029330101X2 BKT
50 BI2029350101W1 HEATSINK BKT B
51 BI372060803RTB SCREW 3xL8(x4)
52 BIRT000610B3X2 SCREW 3X10(x8)
53 BI251011010000 CD MECHANISM
 54 BI403081 FUSE 1.25A 250V F901
 55 BI1401441V POWER CORD G45B
 55 BI1401352X POWER CORD G45E,G45EN,G45EV