JVC UX-G1 User manual

SERVICE MANUAL
COPYRIGHT © 2005 Victor Company of Japan, Limited No.MB412
2005/6
MICRO COMPONENT SYSTEM
MB41220056
UX-G1
Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17
CA-UXG1 SP-UXG1SP-UXG1
TIMER SET
RANDOM SLEEP
REPEAT
STANDBY/ON
TIMER
ON/OFF
REMAIN
BEAT CUT
DISPLAY/
CLOCK SET
MUTING SOUND/
BASS
CD
TAPE CD
VOLUME
TUNER/
BAND
FM MODEPROGRAM
REMOTE CONTROL
STANDBY/ON
OPEN
VOLUME
MICRO COMPONENT SYSTEM
CD SYNCHRO RECORDING
Area suffix
US ------------------------ Singapore
UB ---------------------- Hong Kong
UT ---------------------------- Taiwan
UW ----------- Brazil,Mexico,Peru
UY ------------------------ Argentina

1-2 (No.MB412)
SPECIFICATION
Amplifier Section-CA-UXG1
Speaker Section-SP-UXG1
Design and specifications are subject to change without notice.
Output Power (IEC 268-3) 10 W (5 W + 5 W) at 4 Ω(10% THD)
Speakers/Impedance 4 Ω- 16 Ω
Tuner FM tuning range 87.50 MHz-108.00 MHz
AM tuning range AM 9 kHz intervals: 531 kHz-1 710 kHz
AM 10 kHz intervals: 530 kHz-1 710 kHz
CD player Dynamic range 85 dB
Signal-to-noise ratio 85 dB
Wow and flutter Immeasurable
Cassette deck Frequency response Normal (type I) 100 Hz-10 000 Hz
Wow and flutter 0.35 % (WRMS)
General Power requirement AC 110 V-127 V/220 V-240 V adjustable with the voltage selector 50 Hz/60 Hz
Power consumption 22 W (at operation)
4.5 W (on standby)
Dimensions (W/H/D) (approx.) 145 mm ×209 mm ×226 mm
Mass (approx.) 3.0 kg
Type Full range Bass-reflex type
Speakers 10 cm cone ×1
Power handling capacity 5 W
Impedance 4 Ω
Frequency range 100 Hz to 15 kHz
Dimensions (W/H/D) (approx.) 135 mm ×209 mm ×152 mm
Mass (approx.) 1.3 kg each

(No.MB412)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)
1500 10W
0.15 F AC TYPE

1-4 (No.MB412)
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.
(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.
1M
Conductive material
(conductive sheet) or iron palate
(caption)
Anti-static wrist strap
CD pickup board
Short-circuit point
Card wire
CD mechanism board
CN601

(No.MB412)1-5
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.
REPRODUCTION AND POSITION OF LABELS
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)
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)
!
Please use enough caution not to
see the beam directly or touch it
in case of an adjustment or operation
check.
CLASS 1
LASER PRODUCT
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)
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)
WARNING LABEL

1-6 (No.MB412)
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.

(No.MB412)1-7
SECTION 3
DISASSEMBLY
3.1 Main body
3.1.1 Removing the Rear cover assembly
(See Fig.1 to 5)
(1) Remove the two screws A, the two screws Bon the back
of the body.
(2) Remove the four screws Don each side of the body.
(3) Remove the two screws Eon the bottom of the body.
(4) Move the front panel assembly in the direction of the arrow
and remove. Disconnect the wire from connector CN901
on the transformer board and FM-ANT connector CN203
on the main board.
Caution:
When reassembling, set the joint aon the right and left side to
the groove, and move.
Fig.1
Fig.2
Fig.3
Fig.4
Fig.5
A
B
CD mechanism assembl
y
D
Front panel assembly
EFront panel assembly
Rear cover assembly
Joint a
Joint a
Front panel assembly
CD mechanism assembly
Rear cover assembly
CN901
Front panel assembly
Rear cover assembly Transformer board
Main board
CN203
FM-ANT

1-8 (No.MB412)
3.1.2 Removing the Main board
(See Fig.6, 7)
• Prior to performing the following procedure, remove the rear
cover assembly.
(1) Disconnect the wire from all connectors on the main board.
(2) Cut off the band setting the wire.
(3) Remove the two screws Fand release the joint b.
Fig.6
Fig.7
CN801
CN851
CN850
CN370
CN301
CN401
CN402
CN260
Main board
CD mechanism
assembly
Front panel
assembly
F
Main board
CD mechanism
assembly
Front panel assembly
Joint b

(No.MB412)1-9
3.1.3 Removing the CD mechanism assembly and the Switch board
(See Fig.8 to 10)
• Prior to performing the following procedure, remove the rear
cover assembly and the main board.
(1) Cut off the four bands setting the wires.
(2) Disconnect the wire from connector on the CD open switch
and CN603, CN606 on the CD mechanism board.
(3) Remove the two screws Gon the front panel assembly.
(4) Release the joint dof the CD mechanism assembly.
(5) Remove the five screws Hattaching the switch board to the
CD mechanism assembly.
(6) Unsolder the switch board, if necessary.
Fig.8
Fig.9
Fig.10
CD mechanism board
CD mechanism
assembly
Open switch connecter
CN603
CN606
Front panel
assembly
Band
Band
Band
G
G
Joint d
CD mechanism
assembly
Front panel assembly
Open switch connecter
CN603
CN606
H
H
Switch board
CD mechanism
assembly
Front panel
assembly
Solder point

1-10 (No.MB412)
3.1.4 Removing the CD mechanism board, CD mechanism
(See Fig.11 to 14)
• Prior to performing the following procedure, remove the rear
cover assembly, the main board and the CD mechanism as-
sembly.
Caution:
Make sure to solder the short-circuit point on the CD pickup
board before disconnecting the card wire from connector
CN601 on the CD mechanism board and from the CD pickup
board. If you do not follow this instruction, the pickup may be
damaged.
(1) Remove the four screws Jon the CD mechanism assem-
bly.
(2) Disconnect the wire from connector of the CD motor board.
(3) Solder the short-circuit point on the CD pickup board, and
disconnect the wire from the CD pickup board.
Caution:
To reattach the CD mechanism board, connect the card
wire to connector CN601 on the CD mechanism board
and to the CD pickup board, then unsolder the short-cir-
cuit point.
(4) Remove the screw Kattaching the wire on the CD mecha-
nism board.
Caution:
The metal washer and nut come off.
(5) Remove the four screws Lattaching the CD mechanism.
Fig.11
Fig.12
Fig.13
Fig.14
JJ
Switch board
CD mechanism
board
CD mechanism
assembly
Front panel
Connecter
CD motor board
CN601
CD pickup board
Short-circuit point
Card wire
CD mechanism board
CN601
CD mechanism
assembly
CD motor board
connecter
CD mechanism board
Connecter
Nut
K
LL
CD mechanism
assembly CD mechanism

(No.MB412)1-11
3.1.5 Removing the Headphone board
(See Fig.15)
• Prior to performing the following procedure, remove the rear
cover assembly, the main board and the CD mechanism as-
sembly.
(1) Remove the screw Mon the bracket and pull out the head-
phone board.
Fig.15
3.1.6 Removing the LCD board
(See Fig.16)
• Prior to performing the following procedure, remove the rear
cover assembly, the main board and the CD mechanism as-
sembly.
(1) Remove the ten screws Nand the two screws Pon the
Front panel assembly.
Fig.16
3.1.7 Removing the Cassette mechanism
(See Fig.17)
• Prior to performing the following procedure, remove the rear
cover assembly and the main board.
(1) Remove the four screws Qon the front panel assembly and
press the eject button on the front side to remove the cas-
sette mechanism assembly.
Fig.17
M
Head phones
board
Head phones
bracket
CD mechanism
assembly
Switch board
Front panel
assembly LCD board
P
N
N
N
QQ
Cassette mechanism
assembly Front panel
assembly

1-12 (No.MB412)
3.1.8 Removing the transformer board
(See Fig.18 to 20)
• Prior to performing the following procedure, remove the rear
cover assembly.
(1) From the rear cover assembly, remove the screw Rattach-
ing the transformer board support.
(2) Remove the transformer board from the rear panel assem-
bly in the direction of the arrow.
(3) From the transformer board, remove the screw Tattaching
the transformer board support.
(4) Remove the tap attaching the transformer board cover.
(5) Unsolder the eight points on the wire on the transformer as-
sembly.
3.1.9 Removing the transformer
(See Fig. 18,21)
• Prior to performing the following procedure, remove the rear
cover assembly and the transformer board.
(1) From the rear cover assembly, remove the four screws U
attaching the transformer.
(2) Remove the two screws Ysetting the power cord.
(3) Remove the two screws A' attaching the voltage selector
on the bottom of the body.
(4) Remove the transformer from the rear panel assembly in
the direction of the arrow.
Fig.18
Fig.19
Fig.20
Fig.21
Transformer
Y
Transformer board
Rear cover assembly
R
U
U
R
Solder point
Solder point
Transformer board
Rear cover assembly
Transformer board support
Voltage selector
Solder point
Solder point
Rear cover assembly
Solder
point
Transformer board cover
Transformer board
Tap
T
A'
Rear cover assembly
Voltage selector

(No.MB412)1-13
3.1.10 Removing the FM-ANT board
(See Fig.22)
• Prior to performing the following procedure, remove the rear
cover assembly.
(1) Remove the screw B' on the rear cover assembly.
(2) Unsolder the FM-ANT wire on the FM-ANT board.
Fig.22
Rear cover assembly
B' FM-ANT board

1-14 (No.MB412)
SECTION 4
ADJUSTMENT
4.1 Measuring instructions required for adjustment
• AM signal generator
• FM signal generator
• Inter medicate frequency sweep generator
• FM stereo signal generator
• Low-frequensy oscillator (osillation frequency 50 Hz - 20 kHz, 0 dB output with 600 Ωimpedance)
• Attenuator (600 Ωimpedance)
• Electoronic voltmeter
• Distortion meter
• Torque gauge (cassette for CTG-N)
• Wow & flutter meter
• Frequency counter meter
4.2 Test tape
• Playback tape
VT712 (tape speed, wow flutter)
VT724 (reference level)
VT703L (head azimuth)
VT738 (frequency responce)
• Recording tape
AC225 (type l)
• Power supply voltage
AC220V - 240V 50Hz
4.3 Measuring instruments
• Radio section
4.4 Amplifier section
• Reference output :
Speaker output 0 dB (1 V) / 4 Ω
Headphone output -10 dB (0.1 V) / 32 Ω
4.5 CD section
• Test disc :
CTS-1000 (JVC)
TCD-731R (A-BEX)
TCD-712R (A-BEX)
TCD-785 (A-BEX)
FM : 1 kHz, 22.5kHz deviation
FM stereo : 1 kHz, 67.5 kHz deviation, pilot signal 7.5 kHz
AM : 1 kHz, 30% modulation
Reference output : 0 dB (1 V) 4 Ω
Headphone output : -10 dB (0.1V) 32 Ω

(No.MB412)1-15
4.6 Cassette amplifier section
4.7 Tuner section
Item Measuring condition Check and adjustment procedure Standard value Adjusting part
Head azimuth
adjustment
Tape speed
and
wow/flutter
check and
adjustment
PB frequency
responce
check
Bias frequency
check
REC and PB
frequency
responce
adjustment
Head azimuth
adjusting screw
(to be used only
after head re-
placement)
Tape speed :
motor semifixed
resistor
check only
L203
Output level :
within +/-2dB
of maximum
output level
2940 to 3090 Hz
within 0.38%
(unweighted)
deviation between
1 kHz and 8 kHz :
0 (+3 to -6) dB.
Level difference
between REC and
PB : within 0
(+3 to 6) dB
Phase defference
L and R channels:
minimum
1.Plyback the test tape VT703.
2.Adjust the head azimuth adjusting screw
so that the phase difference between the
R and L channels is minimized at an
output level that is within +/- 2dB of the
maximum output level.
After this adjustment, lock the head
azimuth adjusting screw with screw
sealant to cover more than a half of the
screw head.
3.When the head azimuth is maladjusted,
correct it with the head azimuth adjusting
screw.
1.Plyback the test tape VT712 by the end
of position.
2.Connect a frequency counter and check
that it reads between 2940 and 3090 Hz.
If not, adjust the frequenct with the motor
semifixed resistor.
3.Check that the wow / flutter is 0.38%
(unweighted).
Playback the test tape VT738 while confir-
ming that deviation between the 1 kHz
signal and 8 kHz signal should be
0 (+3 to -6) dB.
Set the TUNER or CD function and with
TAPE to record. Check to see if the
frequency at the measuring point (R335 or
R336) is 60 kHz +/-1 kHz if not adjust T360
until the frequency counter indicates
60 kHz +/- 1 kHz.
At TUNER, set the BAND to the FM
position, and record the reference 1 kHz
signal and 8 kHz signal altemately
repeatedly. While playing back the
recorded signal differ from that of the 1 kHz
signal by within 0 (+3 to 6) dB.
Test tape : VT703
Signal output terminal :
PHONES
(with 32 ohm load)
Test tape : VT712
Signal output terminal :
PHONES
(with 32 ohm load)
Test tape : VT738
Signal output terminal :
PHONES
(with 32 ohm load)
Test tape : normal
Signal output terminal :
Casssette R/P head
Test tape : AC225
Signal input : FM 22.5
dev, 60dBu with
emphasis
Signal output terminal :
PHONES
(with 32 ohm load)
Item Measuring condition Check and adjustment procedure Standard value Adjusting part
AM IF
adjustment
AM tracking
adjustment
Tuner 114 kHz
filter the waves
adjustment
T203
T201
T204
R245
TC201
1.Set the intermediate frequency sweep
generator to AM 450 kHz.
2.Adjust the T203 from maximum and
center output.
1.Set the TUNER at 522 kHz adjust T201
until the test pin of R245 voltage at
1.55 V +/- 0.1 V.
2.Set the TUNER at 1629 kHz, check the
pin of R245 voltage at 8.4 V +/- 6V.
3.Set the TUNER ang S/G at 612 kHz,
adjust T202 for maximum output.
4.Set the TUNER and S/G at 1404 kHz,
adjust T201 for maximum output.
5.Repwat the above step 3 and 4.
1.Set the unit in standby mode. Input 114
kHz signal to IC101 pin 19.
2.Adjust the T204 for output voltage
minimum.
Signal input : Loop
antenna
Signal output : IC201
pin 18
Signal input : Loop
antenna
Signal output : PHONES
(with 32 ohm load)
Signal input : IC101
pin 19
Signal output : IC101
pin 18

1-16 (No.MB412)
4.8 Location of adjusting parts
Cassette mechanism section
CASSETTE
MOTOR
Tape speed adj.
+-
Main board assembly
(BIAS FREQUENCY)
T201
(AM OSC)
T360
(AM RF)
(AM RF)
(AM IF)
(AM VT)
R245
TC201
T203
T204
(114 kHz)
T202

(No.MB412)1-17
SECTION 5
TROUBLESHOOTING
This service manual does not describe TROUBLESHOOTING.

(No.MB412)
AV & MULTIMEDIA COMPANY AUDIO/VIDEO SYSTEMS CATEGORY 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan
Victor Company of Japan, Limited
VPT
Printed in Japan

SCHEMATIC DIAGRAMS
UX-G1
Contents
Wiring diagrams  
Block diagram
Standard schematic diagrams
Printed circuit boards
2-1
2-5
2-6
2-12 to 14
CD-ROM No.SML200506
MICRO COMPONENT SYSTEM
No.MB412SCH
2005/6
COPYRIGHT 2005 Victor Company of Japan, Limited.
Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)
CA-UXG1 SP-UXG1SP-UXG1
TIMER SET
RANDOM SLEEP
REPEAT
STANDBY/ON
TIMER
ON/OFF
REMAIN
BEAT CUT
DISPLAY/
CLOCK SET
MUTING
SOUND/
BASS
CD
TAPE CD
VOLUME
TUNER/
BAND
FM MODEPROGRAM
REMOTE CONTROL
STANDBY/ON
OPEN
VOLUME
MICRO COMPONENT SYSTEM
CD SYNCHRO RECORDING
Area suffix
US ------------------------ Singapore
UB ---------------------- Hong Kong
UT ---------------------------- Taiwan
UW ----------- Brazil,Mexico,Peru
UY ------------------------ Argentina

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.