JVC UX-G33B User manual

SERVICE MANUAL
COPYRIGHT © 2006 Victor Company of Japan, Limited No.MB522
2006/4
MICRO COMPONENT SYSTEM
MB52220064
UX-G33B,UX-G33E,UX-G33EN,
UX-G33EV,UX-G30B,UX-G30E,
UX-G30EN,UX-G30EV
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19
5 TROUBLE SHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20

1-2 (No.MB522)
SPECIFICATION
Design and specifications are subject to change without notice.
Amplifier section Output Power 60 W (30 W + 30 W) at 6Ω(10% THD)
Speakers/Impedance 6Ω- 16Ω
Audio Input AUX LVL 1 500 mV/50 kΩ
AUX LVL 2 250 mV/50 kΩ
AUX LVL 3 125 mV/50 kΩ
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 88 dB
Signal-to-noise ratio 93 dB
Wow and flutter Immeasurable
Speakers Speaker units 10 cm cone ×1 + 1.5 cm dome ×1
Impedance 6Ω
Dimensions (approx.) 140 mm ×231 mm ×195 mm (W/H/D)
Mass (approx.) 1.7 kg each
General Power requirement AC 230 V , 50 Hz
Power consumption 60 W (at operation)
11 W (on standby/display on)
0.95 W (on standby/display off)
Dimensions (approx.) 165 mm ×231 mm ×328 mm (W/H/D)
Mass (approx.) 4.1 kg

(No.MB522)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.MB522)
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.MB522)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 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.
1.7 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 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
Pickup connector Card wire
Short land section

1-6 (No.MB522)
1.9 Important for laser products
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 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
!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
WARNING LABEL
CAUTION : VISIBLE AND / OR INVISIBLE CLASS 1M
LASER RADIATION WHEN OPEN.
DO NOT STARE INTO BEAM OR VIEW
DIRECTLY WITH OPTICAL INSTRUMENTS.
VARNING : SYNLIG OCH / ELLR OSYNLIG LASERSTRALING,
KLASS 1M, NAR DENNA DEL AR OPPNAD.
STIRRA EJ IN I STRALEN OCH BETRAKTA
EJ STRALEN MED OPTISKA INSTRUMENT.
ADVARSEL : SYNLIC OG / ELLER USYNLIG KLASSE
1M-LASERSTRALING VED ABNING.
SE IKKE IND I STRALEN-HELLER IKKE
MED OPTISKE INSTRUMENTER.
AVISO : RADIACION LASER DE CLASE 1M VISIBLE Y/O
INVISIBLE CUANDO ESTA ABIERTO.
NO MIRAR FIJAMENTE EL HAZ NI OBSERVAR
DIRECTAMENTE CON INSTRUMENTAL OPTICO.
ATTENTION : RAYONNEMENT LASER VISIBLE ET / OU INVISIBLE
DE CLASSE 1M UNE FOIS OUVERT.
NE PAS FIXER LE FAISCEAU NI REGARDER
DIRECTEMENT AVEC DES INSTRUMENTS OPTIQUES.
VARO! : AVAT TAESSA OLET ALT TIINA NAKYVALLE JA / TAI
NAKYMAT TOMALLE LUOKAN 1M LASERSATEILYLLE.
ALA KATSO SUORAAN SATEESEEN TAI TARKASTELE
SITA OPTISEN LAIT TEEN LAPI.

(No.MB522)1-7
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.

1-8 (No.MB522)
SECTION 3
DISASSEMBLY
3.1 Main body section
3.1.1 Removing the side cover
(See Figs.1 and 2)
(1) From the rear side of the main body, remove the four
screws Aattaching the side cover. (See Fig.1.)
(2) From the bottom side of the main body, remove the two
screws Battaching the side covers. (See Fig.2.)
(3) Remove the both side covers in the direction of the arrow.
(See Fig.2.)
Fig.1
Fig.2
A A
Side cover
B
B

(No.MB522)1-9
3.1.2 Removing the top cover
(See Figs.3 and 4)
• Remove the side covers.
(1) From the rear side of the main body, remove the screw C
attaching the top cover. (See Fig.3.)
(2) From the both side of the main body, remove the two
screws Dattaching the top cover. (See Fig.4.)
(3) Remove the top cover in the direction of the arrow. (See
Fig.4.)
3.1.3 Removing the front panel assembly
(See Fig. 4)
• Remove the top cover and side covers.
(1) From the right side of the main body, disconnect the card
wire from the connector CN400 and CN401 on the micon
board.
(2) From the both side of the main body, release the claws aof
the front panel assembly and then remove the front panel
assembly.
3.1.4 Removing the tuner
(See Figs.4 and 5)
• Remove the top cover and side covers.
(1) From the right side of the main body, disconnect the card
wire from the connector CN405 on the micon board. (See
Fig.4.)
(2) Remove the two screws Eattaching the tuner to the rear
panel. (See Fig.5.)
3.1.5 Removing the heat sink
(See Figs.5 and 6)
• Remove the top cover and side covers.
(1) From the rear side of the main body, remove the screw F
attaching the rear cover. (See Fig.5.)
(2) Release the joint sections band remove the rear cover.
(See Fig.6.)
(3) Remove the two screws Gand four screws Hattaching the
heat sink. (See Fig.6.)
(4) Remove the heat sink from the rear panel.
Fig.3
Fig.4
Fig.5
Fig.6
C
Top cover
D
a
Top cover
Micon boardCN400 CN401
CN405
Tuner
Rear cove
r
E
F
Rear panel Heat sink
H
G
b
b
b
b
H

1-10 (No.MB522)
3.1.6 Removing the rear panel
(See Fig.7)
• Remove the top cover, side covers, tuner, rear cover and heat
sink.
(1) From the rear side of the main body, remove the screw J
and two screws Kattaching the rear panel.
(2) From the both side of the main body, release the joint sec-
tions cand remove the rear panel.
3.1.7 Removing the main board
(See Figs.7 and 8)
• Remove the top cover, side covers, rear cover and heat sink.
(1) From the rear side of the main body, remove the two
screws Kattaching the micon board to the rear panel. (See
Fig.7.)
(2) From the right side of the main body, remove the two
screws (Mand M') attaching the micon board to the main
body. (See Fig.8.)
Reference:
When attaching the screw M', attach the earth wire with
it.
(3) Disconnect the card wires from the connectors (CN400,
CN401, CN405, CN406) on the micon board. (See Fig.8.)
(4) Disconnect the connectors (CN402, CN403) on the micon
board from the power amplifier board. (See Fig.8.)
Note:
When removing the micon board, take care not to break
the claw of the connector on it.
(5) Remove the micon board from the main body.
Fig.7
Fig.8
3.1.8 Removing the power amplifier board
(See Fig.9)
• Remove the top cover, side covers, tuner, heat sink, rear panel
and micon board.
(1) From the top side of the main body, remove the screw Nat-
taching the power amplifier board to the main body.
(2) Disconnect the connector CN150 on the power amplifier
board from the trans board.
(3) Remove the power amplifier board from the main body.
Fig.9
Rear panel
J
K
CC
M' M
Micon board
CN400
CN401 CN405
CN406
CN402
CN403
N
Trans board
Power amplifier board
CN150

(No.MB522)1-11
3.1.9 Removing the power supply board and power transformer
(See Figs. 10 and 11)
• Remove the top cover, side covers, tuner, heat sink, rear pan-
el, micon board and power amplifier board.
(1) From the top side of the main body, disconnect the power
cord connector CN900 on the trans board. (See Fig.10.)
(2) Remove the three screws Pattaching the power transform-
er from the main body. (See Fig.10.)
(3) From the left side of the main body, remove the screw Q
and then remove the trans board and power transformer.
(See Fig.11.)
Fig.10
Fig.11
3.1.10 Removing the DVD mechanism assembly
(See Fig. 12)
• Remove the top cover, side covers, front panel assembly, tun-
er, heat sink, rear panel, micon board and power amplifier
board.
From the top side of the main body, remove the screw Rattach-
ing the DVD mechanism assembly and then remove the DVD
mechanism assembly from the bottom chassis.
Fig.12
P
Trans board
Power cord
CN900
Q
Trans board
R
DVD mechanism assmbly

1-12 (No.MB522)
3.1.11 Removing the jack board
(See Fig.13)
• Remove the top cover, side covers, front panel assembly, tun-
er, heat sink, rear panel, micon board, power amplifier board
and DVD mechanism assembly.
(1) From the top side of the main body, remove the two screws
Sattaching the jack board on the bottom chassis.
(2) Remove the jack board from the bottom chassis.
Fig.13
3.1.12 Removing the switch board
(See Figs.14 and 15)
• Remove the top cover, side covers and front panel assembly.
(1) From the front side of the front panel assembly, pull out the
volume knob in the direction of the arrow. (See Fig.14.)
(2) From the inside of the front panel assembly, remove the six
screws (Tand T') attaching the switch board. (See Fig.15.)
Reference:
When attaching the screw T', attach the earth wire with it.
(3) Remove the switch board while releasing the claws din the
direction of the arrow. (See Fig.15.)
Fig.14
Fig.15
S
Jack board
Volume knob
Switch board
T
T'
d

(No.MB522)1-13
3.2 CD mechanism assembly
• Remove the CD mechanism assembly from main body.
3.2.1 Removing the CD cover
(See Fig.1)
(1) Remove the two screws Aattaching the CD cover from bot-
tom side of CD mechanism assembly.
(2) Lift up the CD cover from disengage boss aof the CD
mechanism assembly.
(3) Slide the CD cover to direction of the arrow and remove the
CD cover from fixing part of b.
(4) Remove the CD cover.
Fig.1
3.2.2 Removing the tray assembly
(See Fig.2 and 3)
• Remove the CD cover.
(1) Press slide cam and pull out the tray assembly to direction
of the arrow from right side of CD mechanism assembly.
(See Fig.2)
(2) Remove the two screws Battaching the tray assembly
from upper side of CD mechanism. (See Fig.3)
(3) Remove the bussing of the tray assembly from boss cof
the CD mechanism assembly and remove the tray assem-
bly. (See Fig.3)
Fig.2
Fig.3
A
ACD cover
CD mechanism assembly
Boss a
Boss a
Fixing part b
Fixing part b
Tray assembly CD mechanism assembly
Slide cam
Bussing
Boss c
Tray assemblyCD mechanism assembly
Boss c
B

1-14 (No.MB522)
3.2.3 Removing the traverse mechanism assembly
(See Fig.4)
(1) Remove the four screws Cattaching the traverse mecha-
nism assembly from bottom side of CD mechanism assem-
bly.
(2) Disconnect the card wire from connector CN602 of the CD
servo board and then take out the traverse mechanism as-
sembly and CD servo board together.
Reference:
When reattaching the traverse mechanism assembly, the card
wire should through the part d.
Fig.4
CD mechanism assembly
CN602
CD servo board
CC
d
Card wire
Traverse mechanism assembly

(No.MB522)1-15
3.2.4 Removing the CD servo board
(See Fig.5 and 6)
• Remove the traverse mechanism assembly.
(1) Remove the two screws Dattaching the CD servo board
from bottom side of traverse mechanism assembly. (See
Fig.5)
(2) Remove the solder from solder part eof the CD servo
board. (See Fig.5)
(3) Remove the yellow wire from solder part fof the CD servo
board. (See Fig.5)
(4) Remove the white wire from solder part hof the CD servo
board. (See Fig.5)
(5) Remove the CD servo board to upper side, disengage the
hook cto direction of the arrow 1 then turn over the CD ser-
vo board. (See Fig.5)
(6) Solder to short land part jof pickup. (See Fig.6)
(7) Release the lock of connector CN601 to direction of the ar-
row 2 and disengage the card wire. (See Fig.6)
Caution:
• Solder to short land part jof the pickup then disconnect the
card wire from connector CN601 of the CD servo board. If
disconnect the card wire before soldering, pickup is make
sure destroyed by static electricity. (See Fig.6)
• When reattaching the CD servo board, connect the card wire
to connector CN601 and then remove the solder of short
land part jof the pickup.
Fig.5
Fig.6
Traverse mechanism assemblyCD servo board
Yellow wire
White wire
Solder part e
Solder
part f
Solder
part g
DD
Hook h
CN601
Hook h
㧝㧝
Pickup
Short land part j
22
Traverse mechanism assembly
CD servo board
CN601

1-16 (No.MB522)
3.2.5 Removing the pickup
(See Fig.7 to 9)
• Remove the traverse mechanism assembly.
(1) Remove the one screw Eattaching the plate from upper
side of traverse mechanism assembly. (See Fig.7)
(2) Remove the plate from fixing part kthen take out the plate.
(See Fig.7)
(3) Remove the two screws Fattaching the LEAD spring and
then take out the LEAD spring. (See Fig.8)
(4) Take out the feed gear, and then remove the shaft of pick-
up from part mof the traverse mechanism assembly. (See
Fig.8)
(5) Remove the pickup from part nof the traverse mechanism
assembly and then take out pickup with shaft. (See Fig.8)
(6) Release the shaft from pickup. (See Fig.8)
(7) Solder the short land part pof the pickup. (See Fig.9)
(8) Release the lock of the connector to direction of the arrow,
and then disconnect the card wire. (See Fig9)
Caution:
• Solder to short land part pof the pickup then disconnect the
card wire from connector. If disconnect the card wire before
soldering, pickup is make sure destroyed by static electricity.
(See Fig.9)
• When reattaching the pickup, connect the card wire to con-
nector and then remove the solder from short land part p.
(See Fig.9)
3.2.6 Attaching the pickup
(See Fig.7 to 10)
• Please refer the "Removing the pickup".
(1) Connect the card wire to connector of pickup, and then re-
move the solder from short land part pof the pickup. (See
Fig.9)
(2) Attach the shaft to pickup. (See Fig.8)
(3) Fit the pickup to part nof the traverse mechanism and then
attach the end of the shaft to part k. (See Fig.8)
(4) Attach the LEAD spring and feed gear. (See Fig.8)
(5) Attach the plate. (See Fig. 7)
(6) One turn the LEAD gear to direction of the arrow 1 and fully
shift to direction of the arrow 2. (See Fig.10)
Fig.7
Fig.8
Fig.9
Fig.10
Plate
E
Fixing part k
Traverse mechanism assembly
F
Part m
Part m
Pickup
Feed gear Shaft LEAD spring
Pickup Connector Card wire
Short land part p
Traverse mechanism assembly
LEAD gear
Pickup
1
2

(No.MB522)1-17
3.2.7 Removing the feed motor
(See Fig.11 to 13)
• Remove the traverse mechanism.
(1) Remove the yellow wire from solder part qof the CD servo
board from upper side of traverse mechanism. (See Fig.11)
(2) Remove the white wire from solder part rof the CD servo
board. (See Fig.11)
(3) Remove the one screw Gattaching the plate. (See Fig.12)
(4) Disengage the plate from fixing part s and take out the
plate. (See Fig.12)
(5) Remove the feed gear and take out the feed motor. (See
Fig13)
Reference:
When attaching the feed motor, the wire has to through the
part tof the traverse mechanism assembly. (See Fig.13)
Fig.11
Fig.12
Fig.13
Traverse mechanism assemblyCD servo board
Yellow wire
White wire
Soldered part q
Soldered part r
Plate
G
Fixing part s
Traverse mechanism assembly
Traverse mechanism assembly
Feed gear Feed motor part t

1-18 (No.MB522)
3.2.8 Removing the switch board
(See Fig.14)
(1) Disconnect the card wire from CN1 of the switch board
from bottom side of CD mechanism assembly.
(2) Remove the wire from solder part uof the switch board.
(3) Remove the one screw Hattaching the switch board to CD
mechanism assembly.
(4) Lift up the switch board by pushing the hook vof CD mech-
anism assembly and take out it from part w.
Reference:
• After attach the switch board to CD mechanism assembly,
wire hooked to part x.
•Hookuof the CD mechanism assembly, it have to bond
lock.
3.2.9 Removing the motor
(See Fig.14 and 15)
• Remove the tray assembly.
(1) Remove the wire from solder part u of the switch board
from bottom side of CD mechanism assembly.
(2) Remove the belt of motor pulley from upper side of CD
mechanism assembly. (See Fig.15)
Caution:
Belt should not apply grease.
(3) Remove the two screws Jattaching the motor to CD mech-
anism assembly and take out the motor from bottom side
of CD mechanism assembly. (See Fig.15)
Reference:
After motor attached to CD mechanism assembly, wire should
hook to part w. (See Fog.14)
Fig.14
Fig.15
Switch board Wire
Solder
part u
Hook v
Part w
CN1
CD mechanism assembly
HPart w
CD mechanism assembly
J
Belt
Motor pulley

(No.MB522)1-19
SECTION 4
ADJUSTMENT
4.1 Test mode
Step Special key function Keys Description
1 Cold start
Clock fast forward
Volume change
Version display
FL display test
Safety info display
(remocon)
A.STANDBY + SET + DISPLAY
1. Restore factory setting at next AC Power ON.
Volume level: 12
First source at Power ON: CD
Sound Turbo: Enable
AHB Pro: Disable
FM Preset Channel: restore to factory setting
Clock/ Timer: Clear
Dimmer: restore to factory setting
2. FL display: COLD during key pressed.
2 (remocon)
A.STANDBY + SET + FM MODE/ PLAY MODE
1. Clock minute fast increase by 1 every seconds.
(Clock starts from 0:00 if not preset)
2. Pressed again to stop clock fast running.
3. During:
Power Standby: OK
Power ON: OK
ECO mode: OK
Safety trigger: OK
3 (remocon)
A.STANDBY + SET + SOUND TURBO
1. Volume level changes from 40 > 21 > Vol MIN > 40
2. During:
Power Standby: OK (unit will turn ON)
Power ON: OK
ECO mode: OK
Safety trigger: OK
1. All FL segments will blink at 500ms interval.
2. During:
Power Standby: OK
Power ON: OK
ECO mode (Pressing DIMMER key at Power Standby): NG
Safety trigger: NG
3. Press any key (except SOUND TURBO) on the unit or
CANCEL key (remocon) will exit test mode."
4
5
(remocon)
A.STANDBY + SET + AHB PRO
(remocon)
A.STANDBY + SET + BASS/TREBLE
1. Display ROM version for 5 seconds.
2. Example: 37R06107
Digit 1 and 2: ROM version = 37
Digit 3 and 4: ROM Correction version = 0
Digit 5: ROM issue year = 2006
Digit 6: ROM issue month = January
(1: Jan, 2: Feb, 3: Mar, 4: Apr, 5: May, 6: June,
7: July, 8: Aug, 9: Sept, A: Oct, B: Nov, C: Dec)
Digit 7 and 8: ROM issue day = 7
3. During:
Power Standby: NG
Power ON: OK
ECO mode: NG
Safety trigger: NG
6 (Unit)
SOUND TURBO + STOP
1. Safety Information display. During safety trigger,
safety info is display for 2 sec and return to ECO mode.
2. Safety Information display:
NO SAFTY: No Safety triggered.
SFTY- VH: Power IC NG
SFTY-REG: Power Regulator NG
SFTY-ALP: tape module NG
SFTY- CD: CD module NG
SFTY-PRT: Power AMP Protector NG
3. During:
Power Standby: OK
Power ON: NG
ECO mode: OK (FL turns ON for 2sec then turns OFF)
Safety trigger: OK (FL turns ON for 2sec then turns OFF)
4. For version 36, there is no backup of safety information.
It shows only current safety condition.
5. For version 37, last safety information is backup.

1-20 (No.MB522)
SECTION 5
TROUBLE SHOOTING
5.1 Maintenance of laser pickup (CD)
(1) Cleaning the pick up lens
Before you replace the pick up, please try to clean the lens
with a alcohol soaked cotton swab.
(2) Life of the laser diode
When the life of the laser diode has expired, the following
symptoms will appear.
• The level of RF output (EFM output : ampli tude of eye
pattern) will below.
(3) Semi-fixed resistor on the APC PC board
The semi-fixed resistor on the APC printed circuit board
which is attached to the pickup is used to adjust the laser
power. Since this adjustment should be performed to
match the characteristics of the whole optical block, do not
touch the semi-fixed resistor.
If the laser power is lower than the specified value, the la-
ser diode is almost worn out, and the laser pickup should
be replaced.
If the semi-fixed resistor is adjusted while the pickup is
functioning normally, the laser pickup may be damaged
due to excessive current.
5.2 Replacement of laser pickup (CD)
Is the level of
RFOUT under
1.25V 0.22Vp-p? Replace it.
NO
YES
O.K
Turn off the power switch and, disconnect the
power cord from the ac outlet.
Replace the pickup with a normal one.(Refer
to "Pickup Removal" on the previous page)
Plug the power cord in, and turn the power on.
At this time, check that the laser emits for
about 3seconds and the objective lens moves
up and down.
Note: Do not observe the laser beam directly.
Play a disc.
Check the eye-pattern at TP1.
Finish.