JVC UX-S77 User manual

SERVICE MANUAL
COPYRIGHT © 2004 Victor Company of Japan, Limited No.MB230
2004/5
COMPACT COMPONENT SYSTEM
MB23020045
UX-S77
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-35
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-39
(SP-UXS77) (CA-UXS77) (SP-UXS77)
Area suffix
A ------------------------ Australia
US ------------------------ Singapore
UW ------------ Brazil,Mexico,Peru
UX -------------------- Saudi Arabia
UJ ----------------------- U.S.Military
UN ----------------------------- Asean

1-2 (No.MB230)
SPECIFICATION
Design and specifications are subject to change without notice.
Amplifier section Output Power HIGH 40 W (20 W+ 20 W) at 4 Ω(10% THD)
50 W (25 W+ 25 W) at 4 Ω(10% MAX)
LOW 40 W (20 W+ 20 W) at 4 Ω(10% THD)
50 W (25 W+ 25 W) at 4 Ω(10% MAX)
Analog input AUX Sensitivity/Impedance (at 1 kHz)
400 mV/47 k Ω(at "AUX LEVEL 1")
200 mV/47 k Ω(at "AUX LEVEL 2")
Digital output DVD OPTICAL DIGITAL OUT -21 dBm to -15 dBm (660 nm ±30 nm)
VIDEO OUT Color system NTSC
VIDEO (composite) 1 V(p-p)/75 Ω
S-VIDEO Y (luminance):1 V(p-p)/75 Ω
C (chrominance, burst):0.286 V(p-p)/75 Ω
COMPONENT (Y):1 V(p-p)/75 Ω
(PB/PR):0.7 V(p-p)/75 Ω
Speaker Terminals 4 Ω- 16 Ω
Others AV COMPU LINK ×2 (Ø3.5)
Tuner section FM tuning range 87.5 MHz - 108.0 MHz
AM tuning range 531 kHz - 1 710 kHz (at 9 kHz)
530 kHz - 1 710 kHz (at 10 kHz)
Disc player section Playable disc DVD Video/DVD Audio/CD/VCD/SVCD
CD-R/CD-RW (recorded in Audio CD/Video CD/ Super Video CD/ MP3/ WMA/JPEG
format)
DVD-R/DVD-RW (recorded in video format)
Dynamic range 90 dB
Horizontal resolution 500 lines
Wow and flutter Immeasurable
MP3 recording format MPEG 1/2 Audio Layer 3
Max. Bit rate 320 kbps
Cassette deck section Frequency response Normal (type I): 50 Hz - 14 000 Hz
Wow and flutter 0.15% (WRMS)
General Power requirement AC 110 V / AC 127 V / AC 220 V - AC 230 V,
(adjustable with the voltage selector), 50 Hz/60 Hz
Power consumption 90 W (at operation)
12 W (on standby)
5.3 W (with deactivating the clock indication)
Dimensions (approx.) 175 mm ×237 mm ×375 mm (W/H/D)
Mass (approx.) 7.5 kg
Speakers Type 2-Way Bass-reflex type
Speaker Systems Woofer: 10 cm cone ×1
Power handling capacity Tweeter: 4 cm cone ×1
HIGH: 20 W
LOW: 20 W
Impedance HIGH: 4 Ω
LOW: 4 Ω
Frequency range 56 Hz - 40 000 Hz
Sound pressure level 84 dB/W·m
Dimensions (approx.) 145 mm ×236 mm ×205 mm (W/H/D)
Mass (approx.) 2.3 kg each

(No.MB230)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.MB230)
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
DVD pickup
DVD changer mechanism assembly
Short land sections

(No.MB230)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.MB230)
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.

(No.MB230)1-7
SECTION 3
DISASSEMBLY
3.1 Main body section
3.1.1 Removing the side panels L/R (See Figs.1 to 4)
(1) From the both sides of the main body, remove the four
screws Aattaching the side panels L/R. (See Figs.1 and 2)
(2) From the back side of the main body, remove the two
screws Band two screws Cattaching the side panels L/R
to the rear cover and top cover. (See Fig.3)
(3) From the bottom side of the main body, remove the two
screws Dattaching the side panels L/R. (See Fig.4)
(4) Release the claws aof the side panels L/R in the direction
of the arrow and remove the side panels L/R from the main
body. (See Figs.1 and 2)
Fig.1
Fig.2
Fig.3
Fig.4
Side panel L
Claw aClaw a
A
Side panel R Claw aClaw a
A
Side panel L
Rear cover
Top cover
Side panel R
C
B
C
B
DD
Side panel L Side panel R

1-8 (No.MB230)
3.1.2 Removing the top cover (See Figs.5 to 7)
• Prior to performing the following procedure, remove the side
panels L/R.
(1) From the back side of the main body, remove the screw E
attaching the top cover to the rear cover. (See Fig.5)
(2) From the right side of the main body, disconnect the card
wires from the connectors CN790 and CN791 on the main
board. (See Fig.6)
(3) From the both sides of the main body, remove the two
screws Fattaching the top cover to the front panel assem-
bly. (See Fig.7)
(4) Release the claws band remove the top cover from the
main body in the direction of the arrow. (See Fig.7)
Fig.5
Fig.6
Fig.7
Rear cover
Top cove
r
E
Top Cover Main board
CN791 CN790
FF
Claw bClaw b
G
Claw cClaw c
Front panel assembly
Bottom chassis
Top coverTop cover

(No.MB230)1-9
3.1.3 Removing the front panel assembly (See Figs.7 to 10)
• Prior to performing the following procedures, remove the side
panels L/R and top cover.
(1) From the both sides of the main body, remove the two
screws Gattaching the front panel assembly to the bottom
chassis. (See Fig.7)
(2) From the top side of the main body, remove the screw Hat-
taching the earth wire on the shield case. (See Fig.8)
Reference:
When attaching the screw H, attach the earth wire with
it. (See Fig.8)
(3) From the left side of the main body, disconnect the card
wire from the connector CN700 on the main board. (See
Fig.9)
(4) Disconnect the wire from the connector CN767 on the main
board. (See Fig.9)
(5) From the both and bottom sides of the main body, release
the claws cand dattaching the front panel assembly. (See
Figs.7 and 10)
(6) Remove the front panel assembly from the main body in
the direction of the arrow. (See Fig.10)
Fig.8
Fig.9
Fig.10
Front panel assembly
Shield case Earth wire
H
Main board
WireCN767
CN700
Card wire
Front panel assembly
Front panel assembly
Claw cClaw c
Claw d

1-10 (No.MB230)
3.1.4 Removing the rear cover (See Figs.11 and 12)
• Prior to performing the following procedures, remove the side
panels L/R and top cover.
(1) From the left side of the main body, cut off the tie band at-
taching the barrier. (See Fig.11)
(2) Disconnect the wire from the connector CN760 on the main
board. (See Fig.11)
(3) From the back side of the main body, remove the twelve
screws Jand screw Kattaching the rear cover. (See
Fig.12)
(4) Remove the rear cover from the main body.
Fig.11
Fig.12
3.1.5 Removing the fan (See Fig.13)
• Prior to performing the following procedures, remove the side
panels L/R, top cover and rear panel.
(1) From the inside of the rear cover, remove the two screws L
attaching the fan to the rear cover.
(2) Take out the fan from the rear cover.
Reference:
After attaching the fan, pass the wire through the slots e
and fix the wire with the spacer.
Fig.13
Wire CN760 Main board
Rear cover Barrier
Tie band
Rear cover
K J
J
J
Rear cover
Slots e
Wire
Space
r
Fan
L

(No.MB230)1-11
3.1.6 Removing the tuner (See Figs.14 and 15)
• Prior to performing the following procedures, remove the side
panels L/R and top cover.
(1) From the top side of the main body, disconnect the card
wire from the connector CN766 on the main board. (See
Fig.14)
(2) From the back side of the main body, remove the two
screws Mattaching the tuner to the rear cover. (See Fig.15)
(3) Take out the tuner from the main body.
Reference:
Disconnect the card wire from the connector CN1 on the tuner
as required. (See Fig.14)
Fig.14
Fig.15
3.1.7 Removing the video output board (See Fig.16)
• Prior to performing the following procedures, remove the side
panels L/R, top cover and rear cover.
(1) From the top side of the main body, disconnect the card
wire from the connector CN452 on the video output board.
(2) Disconnect the connector CN451 on the video output
board from the connector CN301 on the power amplifier
board.
Reference:
When attaching the video output board, insert the video output
board in the slot fof the bracket.
Fig.16
Main board
CN766
Card wire
Tuner CN1
Rear cover
Tuner
M
CN452
Video output board
CN451
CN301
Power amplifier board
Video output board
Barcket Slot f

1-12 (No.MB230)
3.1.8 Removing the main board (See Fig.17)
• Prior to performing the following procedures, remove the side
panels L/R, top cover assembly and rear cover.
Reference:
Remove the tuner as required. (See 3.1.6 "Removing the tuner")
(1) From the right side of the main body, remove the two
screws Nattaching the main board.
(2) Remove the main board to the direction of this side and dis-
connect the connectors CN761 and CN762 on the main
board.
(3) From the forward side of the main board, disconnect the
card wires from the connectors CN700, CN763 and CN764
on the main board.
(4) Disconnect the wire from the connector CN767 on the for-
ward side of the main board.
Fig.17
3.1.9 Removing the power supply board (See Fig.18)
• Prior to performing the following procedures, remove the side
panels L/R, top cover assembly and rear cover.
Reference:
Remove the tuner as required. (See 3.1.6 "Removing the tuner")
(1) From the left side of the main body, remove the two screws
Pattaching the power supply board.
(2) Cut off the tie band bundling the power cord.
(3) Remove the power supply board toward this side and dis-
connect the connector CN902 on the power supply board.
(4) From the forward side of the power supply board, discon-
nect the power cord and wires from the connectors CN901,
CN904, CN905 and CN907 on the power supply board.
Reference:
• When connecting the wires to the connectors CN904 and
CN905 on the power supply board, bundling the wires with
the wire clamps as before.
• After connecting the power cord to the connector CN901 on
the power supply board, bundle the power cord with the new
tie band as before.
Fig.18
Card wire
Main board
Card wire
CN761
N N
CN764
CN762
CN763Card wire
CN767
CN700
Power supply board
Tie band
Power cord P P
CN902
CN907
CN904 CN905
CN905 CN904
Wire clamps
Wires
CN902

(No.MB230)1-13
3.1.10 Removing the power amplifier board (See Fig.19)
• Prior to performing the following procedures, remove the side
panels L/R, top cover assembly, rear cover, tuner, video output
board, main board and power supply board.
(1) From the top side of the main body, disconnect the card
wire from the connector CN303 on the power amplifier
board.
(2) Remove the tie bands and wire holder bundling the wires.
(3) Remove the four screws Qattaching the power amplifier
board on the shield chassis.
Reference:
• When attaching the power amplifier board on the shield
chassis, align the projections gof the shield case in the slots
of the power amplifier board before attaching the power am-
plifier board with the screws Q.
• After attaching the power amplifier board, insert the wires in
the slot hand bundle the wires with the new tie bands and
wire clamp as before. Fig.19
3.1.11 Removing the heat sink (See Figs.20 and 21)
• Prior to performing the following procedures, remove the side
panels L/R, top cover assembly, rear cover, tuner, video output
board, main board, power supply board and power amplifier
board.
(1) From the reverse side of the power amplifier board, bend
the claws iin the direction of the arrow. (See Fig.20)
(2) From the forward side of the power amplifier board, remove
the four screws Rattaching the heat sink to the bracket.
(See Fig.21)
(3) Release the joints jand remove the heat sink in the direc-
tion of the arrow. (See Fig.21)
Fig.20
Fig.21
Tie bands
CN303
Projection g
Shield chassis
Q
Q
Q
Wire
Wire clamp
Wires
Projection g
Slot h
Power amplifier board
Claws i
Power amplifier board
Joint jJoints j
Heat sink
Bracket
Power amplifier board
R

1-14 (No.MB230)
3.1.12 Removing the power transformer (See Fig.22)
• Prior to performing the following procedures, remove the side
panels L/R, top cover assembly, rear cover, tuner, video output
board, main board, power supply board and power amplifier
board.
(1) From the top side of the main body, cut off the tie bands
holding the wire to the support board.
Reference:
After reassembling, hold the wire with the new tie bands
as before.
(2) Remove the four screws Sattaching the power transformer.
Fig.22
S
S
Wire
Tie band
Support board
Tie band
Power transformer

(No.MB230)1-15
3.1.13 Removing the DVD changer mechanism assembly (See Figs.23 to 26)
• Prior to performing the following procedures, remove the side
panels L/R, top cover and front panel assembly.
(1) From the bottom side of the main body, remove the two
screws Tattaching the bracket (F) to the bottom chassis.
(See Fig.23)
Reference:
When attaching the bracket (F), align the projections kof
the bottom chassis in the holes of the bracket (F). (See
Fig.23)
(2) From the front side of the main body, remove the two
screws Uattaching the bracket (F) to the shield case. (See
Fig.23)
Reference:
When attaching the bracket (F), align the projection mof
the shield case in the holes of the bracket (F). (See
Fig.23)
(3) From the top side of the main body, remove the two screws
V attaching the DVD changer mechanism assembly. (See
Fig.24)
Reference:
Align the projections non the bottom chassis in the holes
of the DVD changer mechanism assembly before attach-
ing the screws V. (See Fig.24)
(4) From the right side of the main body, disconnect the card
wires from the connectors CN603 and CN604 on the con-
nect board. (See Fig.25)
(5) Take out the DVD changer mechanism assembly from the
main body in the direction of the arrow. (See Fig.25)
Note:
When take out the DVD changer mechanism assembly,
be careful not to damage the several parts on the con-
nect board.
(6) From the rear side of the DVD changer mechanism assem-
bly, remove the two screws Wattaching the bracket (R).
(See Fig.26)
Fig.23
Fig.24
Fig.25
Fig.26
Projection kProjection k
T
Projection m
Shield case
Bottom chassis
U
Bracket (F)
DVD changer mechanism assembly
Bottom chassis
V
Projection n
VProjection n
DVD changer mechanism assembly
Card wires
CN603
Connect board
CN604
WBracket (R)
DVD changer mechanism assembly

1-16 (No.MB230)
3.1.14 Removing the connector board (See Fig.27)
• Prior to performing the following procedures, remove the side
panels L/R, top cover, front panel assembly and DVD changer
mechanism assembly.
(1) From the bottom side of the DVD changer mechanism as-
sembly, remove the two screws Xattaching the connector
board.
(2) Disconnect the card wire from the connector CN501 and
CN503 on the DVD servo board.
Fig.27
3.1.15 Removing the cassette mechanism assembly (See Fig.28)
• Prior to performing the following procedures, remove the side
panels L/R and top cover.
(1) From the reverse side of the top cover, remove the screws
Yattaching the dummy board.
(2) Take out dummy board.
(3) Remove the four screws Zattaching the cassette mecha-
nism assembly, and take out the cassette mechanism as-
sembly.
Reference:
After attaching the cassette mechanism assembly, fix the card
wires with the dummy board.
Fig.28
Connector board
CN503 CN501
DVD changer assembly
DVD servo board
X
Z
Cassette mechanism assembly
Dummy board
Z
Y

(No.MB230)1-17
3.1.16 Removing the FL board (See Fig.29)
• Prior to performing the following procedures, remove the side
panels L/R, top cover and front panel assembly.
(1) From the inside of the front panel assembly, remove the
five screws AA attaching the FL board.
(2) Take out the FL board from the front panel assembly and
remove the solders from the soldered section pto remove
the parallel wire.
Reference:
When attaching the FL board, align the projection qof the front
panel assembly in the hole of the FL board.
3.1.17 Removing the headphone jack board (See Fig.29)
• Prior to performing the following procedures, remove the side
panels L/R, top cover and front panel assembly.
(1) From the inside of the front panel assembly, remove the
screw AB and screw AB' attaching the headphone jack
board.
(2) Take out the headphone jack board with the wires.
Reference:
• When attaching the wires, attach the washer board with the
screw AB'.
• After attaching the headphone jack board, fix the wires with
the spacer. Fig.29
3.1.18 Removing the switch board (See Figs.30 and 31)
• Prior to performing the following procedures, remove the side
panels L/R, top cover, front panel assembly and FL board.
(1) From the front side of the front panel assembly, pull out the
volume knob. (See Fig.30)
(2) From the inside of the front panel assembly, remove the
five screws AC attaching the switch board. (See Fig.31)
(3) Release the claws rin the direction of the arrow and re-
move the switch board from the joints sof the front panel
assembly. (See Fig.31)
(4) Take out the switch board from the front panel assembly.
Reference:
• Remove the parallel wire from the soldered section ton the
switch board as required. (See Fig.31)
• When attaching the switch board, align the projection uof
the front panel assembly in the hole of the switch board.
(See Fig.31)
Fig.30
Fig.31
AA AA
AA
AB'
AB
FL board
Front panel assembly
Projection q
Solder
section p
Parallel wire
Washer board
Spacer
Headphone jack board
Front panel assembly
Volume knob
Front panel assembly
Parallel wire
AC
AC AC
Projection u
Claws r
Joints s
Claw r
Solder
section t
Switch board

1-18 (No.MB230)
3.2 DVD changer mechanism assembly section
3.2.1 Removing the tray assemblies
(See Figs.1 to 5)
(1) From the top side of the main body, remove the two screws
Afrom the top cover and release the two joints aon the
both sides of the DVD changer mechanism assembly. (See
Figs.1 and 2.)
(2) Remove the two rods from the top cover and remove the
top cover from the lifter assembly. (See Figs.1 and 2.)
(3) Remove the open det. lever on the left side of the DVD
changer mechanism assembly. (See Fig.3.)
(4) From the right side of the DVD changer mechanism as-
sembly, draw out the tray assemblies toward the front while
pushing the part bof the side (R) assembly. (See Figs.4
and 5.)
Note:
The tray can be locked if all tray assemblies are at-
tached.
(5) From the topside of the DVD changer mechanism assem-
bly, move the stopper tabs cin the direction of the arrow
and release them. Pull out the tray assemblies from the
DVD changer mechanism assembly. (See Fig. 5.)
Note:
Remove the tray assembly from top tray 5 in order.
Reference:
When reattaching the tray assembly, or when removing the
disc remaining inside, refer to another section"3.2.15 Taking
out the disc in the play mode".
Fig.1
Fig.2
Fig.3
Fig.4
Fig.5
Top cove
r
Lifter assembly
Rods
A
a
a
A
aRods
Top cove
r
Lifter assembly
a
Open det. leve
r
b
Tray assemblies Side(R) assembly
c
Tray assembly

(No.MB230)1-19
3.2.2 Removing the DVD servo board
(See Figs.6 to 8)
Caution:
Solder the short land sections don the DVD pickup before dis-
connecting the card wire extending from the DVD pickup. If
you do not follow this instruction, the DVD pickup may be dam-
aged.
(1) From the topside of the DVD changer mechanism assem-
bly, solder the short land sections don the DVD pick up.
(See Fig.6.)
(2) From the bottom side of the DVD changer mechanism as-
sembly, disconnect the card wire from the connectors
(CN201, CN451) on the DVD servo board. (See Fig.7.)
(3) Disconnect the wires from the connectors (CN452, CN453)
on the DVD servo board. (See Fig.7.)
(4) Remove the screw Battaching the earth wire. (See Fig.7.)
Reference:
After attaching the earth wire, fix it with the spacer as be-
fore. (See Fig.7.)
(5) Remove the two screws Cattaching the DVD servo board.
(See Fig.7.)
(6) From the reverse side of the DVD servo board, release the
lock of the connector CN101 in the direction of the arrow
and disconnect the card wire. (See Fig.8.)
Caution:
Unsolder the solders from the short land sections dafter reas-
sembling. (See Fig.6.)
3.2.3 Removing the switch board
(See Fig.7)
• Prior to performing the following procedures, remove the DVD
servo board.
(1) From the bottom side of the DVD changer mechanism as-
sembly, remove the screw Dattaching the switch board to
the DVD changer mechanism assembly.
(2) Loosen the screw Eattaching the DVD traverse mecha-
nism assembly and take out the switch board while lifting
the section eof the DVD traverse mechanism assembly.
(3) Release the wires from the slots fof the switch board.
Reference:
When reassembling, pass the wire through the section gof the
DVD traverse mechanism assembly.
Fig.6
Fig.7
Fig.8
DVD pickup
DVD changer mechanism assembly
Short land sections d
D
DVD changer mechanism assembly
DVD servo board Card wire
E
C
B
C
CN451
CN452 CN453
Card wire
Wires
Switch board
e
DVD traverse mechanism assembly
CN201
g
f
Earth wire
DVD servo board
Lock
Card wire
CN101

1-20 (No.MB230)
3.2.4 Removing the motor board
(See Figs.9 and 10)
(1) From the top side of the DVD changer mechanism assem-
bly, remove the two belts from the motor pulleys. (See
Fig.9.)
Note:
Take care not to attach grease on the belt.
(2) Remove the four screws Fattaching the motors to the load-
er assembly. (See Fig.9.)
(3) From the bottom side of the DVD changer mechanism as-
sembly, remove the two screws G. (See Fig.10.)
(4) Disconnect the connector CN2 on the motor board from the
tray switch board and remove the motor board. (See
Fig.10.)
(5) Disconnect the card wire from the connector CN1 on the
motor board. (See Fig.10.)
Note:
When connecting the card wire, let the card wire through the
slots gof the motor board. (See Fig.10.)
Reference:
You need not to remove the tray assemblies, and in such case,
move it.
3.2.5 Removing the motor
(See Fig. 10)
• Prior to performing the following procedures, remove the motor
board.
(1) From the reverse side of the motor board, unsolder the four
soldered sections hon the motor board.
(2) From the forward side of the motor board, remove the mo-
tors.
Note:
When reattaching the motor, turn the side where the label
should be put to the front side.
Fig.9
Fig.10
Motor Motor
Motor pulleys Loader assembly
Belt
Belt
F
F
G
g
CN2
Card wire
Motors
Soldered sections h
CN1
G
Motor board
DVD changer mechanism assembly
Tray switch
board
Label
Motors
Motor board