JVC MXGA-9-V Service manual
SERVICE MANUAL
COMPACT COMPONENT SYSTEM
MB01120039
MX-GA9V
COMPACT
DIGITAL VIDEO
UX ---------- Saudi Arabia
UN ------------------ Asean
U ------------- Other Areas
COMPACT
DIGITAL AUDIO
Area Suffix
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-36
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-40
COPYRIGHT © 2003 VICTOR COMPANY OF JAPAN, LIMITED
No.MB011
2003/10
SPECIFICATION
Amplifier section
Output Power SUB WOOFERS 88 W per channel, min. RMS, both channels driven into 6 Ω at 63
Hz with no more than 0.9% total harmonic distortion.
MAIN SPEAKERS 28 W per channel, min. RMS, both channels driven into 6 Ω at 1
kHz with no more than 0.9% total harmonic distortion.
Audio input sensitivity/Impedance
(Measured at 1 kHz, with tape
recording signal 300 mV)
Digital output CD OPTICAL DIGITAL OUTPUT
Signal wave length 660 nm
Output level -15 dBm to -12 dBm
Speakers/Impedance SUB WOOFERS 6 Ω - 16 Ω
FM tuning range 87.50 MHz - 108.00 MHz
AM tuning range For Saudi Arabia At 9 kHz intervals : 531 kHz - 1 602 kHz
CD capacity 3 CDs
Dynamic range 85 dB
Signal-to-noise ratio 90 dB
Wow and flutter Immeasurable
Frequency response Normal (type I) 50 Hz - 14 000 Hz
Power requirement AC 110 V / AC 127 V / AC 220 V / AC 230 V - AC 240 V~(adjustable with the voltage selector),
Power consumption 170 W (at operation) 25 W (on standby)
Dimensions (approx.) 265 mm × 335 mm × 401 mm (W/H/D) (10 7/16 in. × 13 1/4 in. × 15 13/16 in.)
Mass (approx.) 10.0 kg (22.1 lbs)
AUX 390 mV/50 kΩ
MIC 1/2 3.0 mV/5 kΩ
MAIN SPEAKERS 6 Ω - 16 Ω
SURROUND SPEAKERS 16 Ω - 32 Ω
Tuner
At 10 kHz intervals : 530 kHz - 1 600 kHz
For other countries At 9 kHz intervals : 531 kHz - 1 710 kHz
At 10 kHz intervals : 530 kHz - 1 710 kHz
CD player
Cassette deck
Wow and flutter 0.15% (WRMS)
General
50 Hz / 60 Hz
1-2 (No.MB011)
SECTION 1
PRECAUTION
1.1 Safety Precautions
(1) This design of th is product contains special hardw are and
many circuits and components specially for safety purposes. For continued protection, no changes should be made
to the original design unless authorized in writing by the
manufacturer. Replacement parts must be identical to
those used in the original circuits. Services should be performed by qualified personnel only.
(2) Alterations of the design or circuitry of the product should
not be made. Any design alterations of the product should
not be made. Any design alterations or additions will void
the manufacturers warranty and will further relieve the
manufacture of responsibility for personal injury or property
damage resulting therefrom.
(3) Many electrical and mechanical parts in the products have
special safety-related characteristics. These characteristics are often not evident from visual inspection nor can the
protection afforded by them necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special
safety characteristics are identified in the Parts List of Service Manual. Electrical components having such features
are identified by shading on the schematics and by ( ) on
the Parts List in the Service Manual. The use of a substitute
replacement which does not have the same safety characteristics as the recommended replacement parts shown in
the Parts List of Service Manual may create shock, fire, or
other hazards.
(4) The leads in the products are routed and dressed with ties,
clamps, tubings, barriers and the like to be separated from
live parts, high temperature parts, moving parts and/or
sharp edges for the prevention of electric shock and fire
hazard. When service is required, the original lead routing
and dress should be observed, and it should be confirmed
that they have been returned to normal, after reassembling.
(5) Leakage shock hazard testing
After reassembling the product, always perform an isolation check on the exposed metal parts of the product (antenna terminals, knobs, metal cabinet, screw heads,
headphone jack, control shafts, etc.) to be sure the product
is safe to operate without danger of electrical shock.Do not
use a line isolation transformer during this check.
• Plug the AC line cord directly into the AC outlet. Using a
"Leakage Current Tester", measure the leakage current
from each exposed metal parts of the cabinet, particularly any exposed metal part having a return path to the
chassis, to a known good earth ground. Any leakage current must not exceed 0.5mA AC (r.m.s.).
• Alternate check method
Plug the AC line cord directly into the AC outlet. Use an
AC voltmeter having, 1,000Ω per volt or more sensitivity
in the following manner. Connect a 1,500Ω 10W resistor
paralleled by a 0.15µF AC-type capacitor between an exposed metal part and a known good earth ground.
Measure the AC voltage across the resistor with the AC
voltmeter.
Move the resistor connection to each exposed metal
part, particularly any exposed metal part having a return
path to the chassis, and measure the AC voltage across
the resistor. Now, reverse the plug in the AC outlet and
repeat each measurement. Voltage measured any must
not exceed 0.75 V AC (r.m.s.). This corresponds to 0.5
mA AC (r.m.s.).
AC VOLTMETER
(Having 1000
ohms/volts,
or more sensitivity)
0.15 F AC TYPE
Place this
probe on
1500 10W
Good earth ground
1.2 Warning
(1) This equipment has been designed and manufactured to
meet international safety standards.
(2) It is the legal resp onsibility 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 compone nts 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 preforming 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)
each exposed
metal part.
(No.MB011)1-3
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 dio de) in devices such as CD players.
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 sh eet) 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.
(caption)
Anti-static wrist strap
1M
Conductive material
(conductive sheet) or iron palate
(3) Handling the optical pickup
• In order to maintain quality during transport and before installation, both sides of the laser diode on the replacement optica l
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 CD pickup unit.
• Apply solder to the short land sections before the flexible wire is disconnected from the connector on the CD servo board. (If the
flexible wire is disconnected without applying solder, the CD 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.
1-4 (No.MB011)
CD changer
mechanism
assembly
CD traverse
unit
Flexible cable
Soldering
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 compact disc 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 de
feated. 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 herein may result in
hazardous radiation exposure.
!
Please use enough caution not to
see the beam directly or touch it
in case of an adjustment or operation
check.
REPRODUCTION AND POSITION OF LABEL and PRINT
WARNING LABEL and PRINT
CLASS 1
LASER PRODUCT
(No.MB011)1-5
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.
1-6 (No.MB011)
SECTION 3
A
A
DISASSEMBLY
3.1 Main body
3.1.1 Removing the metal cover
(See Fig.1 ~ 3)
(1) Remove the six screws A on the back of the body.
(2) Remove the two screws B on both sides of the body.
(3) Remove the metal cover from the body by lifting the rear
part of the cover.
CAUTION:
Do not break the front panel tab fitted to the metal cover.
Metal cover
A
Metal cover
B
Fig.2
Metal cover
Fig.1
B
Fig.3
(No.MB011)1-7
3.1.2 Removing the CD changer mechanism assembly
(See Fig.4 ~ 6)
• Prior to performing the following procedure, remove the metal
cover.
(1) Disconnect the wire from connector CN705 on the amplifier
board.
(2) Remove the plastic rivet attaching the main boa rd to the
front assembly on the right side of the body.
(3) Disconnect the card wire from connector CN661
main board.
(4) Remove the two screws C on the upper si de of the body
and the two screws D on the back of the rear panel.
(5) Pull both the rear panel and the front panel assembly to the
outside, then remove the CD changer mechanism assembly by lifting the rear part of the assembly.
REFERENCE:
At this point, one card wire on the underside of the CD
mechanism assembly is still connected.
(6) Disconnect the card wire from connector CN504
ner side of the main board on the right side of the body. Remove the CD mechanism assembly.
CAUTION:
To prevent damage to the CD fitting, be sure to pull both the
rear panel and the front panel assembly enough to remove the
CD changer mechanism assembly.
CD changer mechanism assembly
Front panel assembly
on the
on the in-
Front panel assembly
C
Main board
CN661
CN504
Fig.5
CD changer mechanism assembly
Plastic rivet
Main board
CN661
CN504
C
CD changer
mechanism assembly
Rear panel
Rear panel
D
Rear panel
Amplifier board
CN705
Fig.4
3.1.3 Removing the fan
(See Fig.7)
• Prior to performing the following procedure, remove the metal
cover and the CD changer mechanism assembly.
(1) Turn over the CD changer mechanism assembly and re-
move the two screws E attaching the fan.
Front panel assembly
E
Fig.6
Fan
E
1-8 (No.MB011)
CD changer mechanism assembly
Fig.7
3.1.4 Removing the front panel assembly
A
(Bottom)
(See Fig.8 ~ 11)
• Prior to performing the following procedure, remove the metal
cover and CD changer mechanism assembly.
(1) Disconnect the card wires from connector CN870
and CN315 on the main board respectively.
(2) Remove the wire clamp and disconnect the wire from con-
nector CN703
(3) Disconnect the wire from connector CN220
former board.
(4) Remove the four screws F on the bottom of the body.
(5) Release the two joints a on the lower right and left sides of
the body using a screwdriver, and remove the front panel
assembly toward the front.
on the amplifier board.
, CN871
on the trans-
(Bottom)
(Bottom)
F
mplifier board
CN703
Transformer board
Wire clamp
CN220
Fig.8
Main board
CN870
CN871
CN315
Front panel
assembly
Fig.9
Front panel assembly
Fig.10
Joint a
Fig.11
Joint a
Front panel assembly
3.1.5 Removing the tuner board
(See Fig.12)
• Prior to performing the following procedure, remove the metal
cover.
(1) Disconnect the card wire from connector CN1
board on the right side of the body.
(2) Remove the plastic rivet fixing the tuner board.
(3) Remove the two screws G on the back of the body.
on the tuner
Plastic rivet
CN1
Tuner board
Rear panel
G
Fig.12
(No.MB011)1-9
3.1.6 Removing the rear cover / rear panel
(See Fig.13 ~ 16)
• Prior to performing the following procedure, remove the metal
cover and the CD changer mechanism assembly.
(1) Remove the screw H attaching the rear cover on the back
of the body.
(2) Push each tab of the four joints b in the direction of the ar-
row and release.
(3) Remove the sixteen screws G attaching the rear panel.
(4) Disengage the joints c on each lower side of the rear panel
using a screwdriver and remove the rear panel backward.
Joint b
G
G
Rear cover
H
Fig.13
Rear panel
Joint b
Rear panel
G
G
Fig.14
Rear panel
Fig.15
G
G
Joint c
1-10 (No.MB011)
Joint c
Rear panel
Fig.16
3.1.7 Removing the main board
A
(See Fig.17 ~ 19)
• Prior to performing the following procedure, remove the metal
cover, the CD changer mechanism assembly, the rear panel
and the antenna board.
(1) Disconnect the card wires from connector CN870
and CN315 on the main board.
(2) Disconnect the wires from connector CN704 and CN706
on the amplifier board.
(3) Disconnect the wire from connector CN710
board.
(4) Remove the screw I attaching the main board on the right
side ofthe body.
(5) Disconnect connector CN211
board from the regulator board.
3.1.8 Removing the speaker board
(See Fig.19)
• Prior to performing the following procedure, remove the metal
cover, the CD changer mechanism assembly and the rear panel.
REFERENCE:
It is not necessary to remove the main board.
(1) Disconnect connector CN217
the regulator board.
(2) Disconnect the wire from connector CN710
board.
and CN212 on the main
on the speaker board from
, CN871
on the speaker
on the speaker
CN315
CN871
mplifier board
CN704
CN706
Speaker board
CN710
Front panel assembly
Main board
CN870
Fig.17
Front panel assembly
Main board
Regulator board
Regulator board
Fig.18
Fig.19
I
CN212
Speaker board
CN217
CN211
CN710
(No.MB011)1-11
3.1.9 Removing the power board
(See Fig.20)
• Prior to performing the following procedure, remove the metal
cover, the CD changer mechanism assembly and the rear panel.
(1) Remove a wire clamp on the power board.
(2) Disconnect the wire from connector CN218
CN250 on the power board.
(3) Disconnect connector CN213
regulator board.
3.1.10 Removing the amplifier board / voltage board / heat sink
(See Fig.21, 22)
• Prior to performing the following procedure, remove the metal
cover, the CD changer mechanism assembly and the rear panel.
(1) Disconnect the wires from connector CN703
CN706 on the amplifier board respectively.
(2) Remove the two wire clamps attaching the wire to the am-
plifier board and the voltage board.
(3) Disconnect connector CN215
CN216 on the voltage board from the regulator board (The
heat sink will be detached at once).
(4) Remove the four screws J attaching the amplifier board to
the heat sink.
(5) Remove the two screws K, the board bracket and the volt-
age board.
REFERENCE:
It is not necessary to remove the power board.
on the power board from the
on the amplifier board and
, CN219 and
, CN704 and
Power board
CN219
CN250
CN213
Amplifier board
Wire clamp
Voltage board
CN218
Wire clamp
Fig.20
Wire clamp
CN704
CN706
CN703
Regulator board
Heat sink
Voltage board
K
CN216
CN215
Fig.21
Amplifier board
J
J
Fig.22
1-12 (No.MB011)
3.1.11 Removing the power transformer assembly
(See Fig.23, 24)
• Prior to performing the following procedure, remove the metal
cover, the CD changer mechanism assembly and the rear panel.
(1) Disconnect the wires from connector CN218
on the power board.
(2) Disconnect the wire from connector CN204 on the regula-
tor board.
(3) Release the wire from the stopper on the regulator bo ard.
(4) Remove the four screws L attaching the transformer as-
sembly.
and CN219
CN219
Power board
Regulator board
CN204
CN218
Power transformer assembly
Fig.23
Stopper
LL
Power transformer
assembly
Fig.24
Regulator board
CN204
(No.MB011)1-13
3.1.12 Removing the regulator board
(See Fig.25)
• Prior to performing the following procedure, remove metal cov-
er, CD changer mechanism assembly, rear panel, antenna
board, main board, amplifier board, voltage board, power
board and speaker board.
(1) Disconnect the wire from conne ctor CN204
tor board.
(2) Release the wire from the stopper on the regulator board.
(3) Remove the two screws M attaching the reglator board.
on the regula-
Stopper
M
M
3.1.13 Removing the power cord
(See Fig.26)
• Prior to performing the following procedure, remove the metal
cover, the CD changer mechanism assembly and the rear panel.
(1) Disconnect the wire from connector CN250
board.
(2) Remove the wire clamp from the power board.
(3) Move the power cord stopper upward and pull out it from
the base chassis.
on the power
Power transformer assembly
Power board
CN250
Power cord stopper
Base chassis
Regulator board
CN204
Fig.25
Wire clamp
Fig.26
1-14 (No.MB011)
3.2 Front panel assembly
• Prior to performing the following procedure, remove the metal
cover, the CD changer mechanism assembly and the front
panel assembly.
3.2.1 Removing the cassette mechanism assembly
(See Fig.27)
(1) Disconnect the card wire from connector CN306
head amplifier & mechanism control board.
(2) Remove the seven screws N attaching the cassette mech-
anism assembly.
on the
Head amplifier
& mechanismcontrol board
CN306
N
N
Cassette mechanism
assembly
N
N
Fig.27
(No.MB011)1-15
3.2.2 Removing the display system control board
(See Fig.28 ~ 30)
(1) Remove the four screws O attaching the stay bracket.
(2) Disconnect the card wires from connector CN316 and
CN880 on the display system control board.
(3) Remove the seven screws P attaching the display system
control board.
(4) If necessary, disconnect the wire from connector CN911
the front side of the display system control board and unsolder FW915.
3.2.3 Removing the CD eject board
(See Fig.30, 31)
(1) Remove the three screws Q attaching the CD eject board.
(2) If necessary, unsolder FW91 5 on the CD eject board.
on
Display system control board
P
FW915
(Solding)
P
P
O
Stay bracket
Fig.28
CN316
P
P
CN880
Fig.29
CN911
Display system control board
Fig.30
CD eject board
FW915
(Solding)
Q
Q
Display system control board
CD eject board
FW915
FW915
1-16 (No.MB011)
Fig.31
3.2.4 Removing the preset / tuning switch board
(See Fig.32, 33)
• Prior to performing the following procedure, remove the dis-
play system control board.
(1) Pull out the preset knob on the front panel.
(2) Remove the four screws R attaching the preset / tuning
switch board.
(3) If necessary, unsolder FW901 on the preset / tuning switch
board.
3.2.5 Removing the operation switch board
(See Fig.33, 34)
• Prior to performing the following procedure, remove the dis-
play system control board and the preset / tuning switch board.
(1) Pull out the volume knob on the front panel and remove the
nut. Pull out the surround mode knob, the mic level knob
and the surround woofer level knob toward the front.
(2) Remove the twelve screws S attaching the operation
switch board.
(3) Release each tab of the seven joints d retaining the opera-
tion switch board.
Preset / tuning switch board
R
R
Fig.32
Preset knob
Surround mode knob
Surround woofer
level knob
Joint d
Joint d
Volume knob
S
S
S
Joint d
Joint d
Nut
Fig.33
Fig.34
Mic level knob
S
Operation
switch board
SSS
Joint d
(No.MB011)1-17
3.3 CD Changer Mechanism
A
• Remove the CD changer mechanism assembly.
3.3.1 Removing the CD Servo control board
(See Fig.1)
(1) From bottom side the CD changer mechanism assem-
bly,remove the four screws A retaining the CD servo control board.
(2) Absorb the four soldered po sitions a of the right and left
motors with a soldering absorber.
(3) Pull out the ea rth wire on the CD cha nger mechanism as-
sembly.
(4) Disconnect the connector CN854
board.
(5) Disconnect the card wire CN601
on the CD servo control board.
on the CD servo control
and the connector CN801
A
a
CN854
CN651
CD servo control board
CN801
CN151
CN601
a
AA
Fig.1
1-18 (No.MB011)
3.3.2 Removing the CD tray assembly
(See Fig.2~9)
(1) Remove the CD servo control board.
(2) Remove the screw B retaining the lod stopper.
(3) From the T.bracket section b and clamper base section c ,
remove both of the edges fixing the rod.
(4) Remove the three screws C retaining the T.bracket.
(5) Remove the screw D retaining the clamper assembly.
(6) From the left side face of the chassis assembly, remove the
one screw E retaining both of the return spring and lock le-
ver.
(7) By removing the pawl at the se ction d fixing the return
spring, dismount the return spring.
(8) Remove the three lock levers.
(9) Check whether the lifter unit stopper has be en caught into
the hole at the section e of CD tray assembly as shown in
Fig.5.
(10) Make sure that the driver unit elevator is positioned as
shown in Fig.6 from to the second or fifth hole on the left
side face of the CD changer mechanism assembly.
CAUTION:
In case the driver unit elevator is not at above position,
set the elevator to the position as shown in Fig.7 by manually turning the pulley gear as shown in Fig.8.
(11) Manually turn the motor pul ley in the clockwise direction
until the lifter unit stopper is lowered from the section e of
CD tray assembly.
(12) Pull out all of the thre e stages of CD tray assembly in the
arrow direction f until these stages stop.
(13) At the position where the CD tray assembly has stopped,
pull out the CD tray assembly while pressing the two pawls
g and g' on the back side of CD tray assembly. In this
case, it is easy to pull out the assembly when it is pulled out
first from the stage CD tray assembly.
C
Clamper assembly
T.Braket
C
B
Lod stopper
(C/J version only)
C
D
Fig.3
d
Return spring
Clamper base
Lock lever
Fig.4
Stopper
E
b
Rod
c
T.Braket
Fig.2
e
CD tray
assembly
Fig.5
(No.MB011)1-19
f
Chassis assembly
r
A
Refer to Fig.7
Pawl
g
Fig.6
Drive unit of elevato
Fig.7
CD tray assembly
Pulley gear
Motor pulley
Fig.8
CD
3
CD
2
CD
1
CD tray assembly
3.3.3 Removing the CD loading mechanism assembly
(See Fig.10)
(1) While turning the cams R1 and R2 assembly in the arrow
direction h ,align the shaft i of the CD loading mechanism
assembly to the position shown in Fig.10.
(2) Remove the four screws F retaining the CD loading mech-
anism assembly.
Pawl g, g'
Fig.9
Cams R1, R2 assembly
rrow
h
i
F
F
1-20 (No.MB011)
F
CD loading mechanism assembly
Fig.10
F
3.3.4 Removing the CD traverse mechanism
j
(See Fig.11 and 12)
(1) For dismounting only the CD traverse mechanism without
removing the CD loading mechanism assembly, align the
shaft j of the CD loading mechanism assembly to the position shown Fig.11 while turning the cam R1 and R2 assembly in the arrow direction k .
(2) By raising the CD loading mechanism assembly in the ar-
row direction l , remove the assembly from the lifter unit.
Cam R1, R2 assembly
Fig.11
Arrow
k
CD traverse mechanism
3.3.5 Removing the CD pick unit
(See Fig.13)
(1) Move the cam gear in the arrow direction m . Then, the CD
pickup unit will be moved in the arrow dire cti o n n .
(2) According to the above step, shift the CD pickup unit to the
center position.
(3) While pressing the stopper retaining the shaft in the arrow
direction o , pull out the shaft in the arrow direction p .
(4) After dismounting the shaft from the CD pickup unit, re-
move the CD pickup unit.
Lifter unit
Fig.12
CD Pickup unit
n
m
Arrow
l
CD loading
mechanism
Shaft
Cam gear
Shaft
o
Stopper Stopper
Shaft
p
Fig.13
(No.MB011)1-21
3.3.6 Removing the try select switch board
r
(See Fig.14)
(1) Remove the two screws G retaining the tra y select sw itch
board.
(2) Disconnect the tray select switch board from connector
on the CD servo control board.
CN854
Chassis assembly
Tray select
switch board
CN854
CN851
CD servo
control board
3.3.7 Removing the cam unit
(See Fig.15 ~17)
• Remove the CD loading mechanism assembly.
(1) While turning the cam gear q , align the Paul r position of
the drive unit to the notch position on the cam gear q .
(2) Pull out the drive unit and cylinder gear .
(3) While turning the cam gear q , align the Paul s position
of the select lever to the notch position on the cam gear q .
(4) Remove the four screws H retaining the cam unit(cam
gear q and cams R1/R2 assembly).
Drive unit
Cam gear q
r
Fig.14
Drive unit
Cylinder gea
CN804
G
1-22 (No.MB011)
Fig.15
Cam gear q
s
H
Fig.16
Cams R1, R2 assembly
Cam unit
H
Select lever
Fig.17
3.3.8 Removing the actuator motor and belt
r
(See Fig.18~21)
(1) Remove the two screws I retaining the gear bracket.
(2) While pressing the pawl t fixing the gear bracket in the ar-
row direction, remove the gear bracket.
(3) From the notch u section on the chassis assembly fixing
the edge of gear bracket, remove and take out the gear
bracket.
(4) Remove the belts respectively from the right and left actu-
ator motor pulleys and pulley gears.
(5) After turning over the chassis asse mbly, remove the actu-
ator motor while spreading the four pawls v fixing the right
and left actuator motors in the arrow direction.
ATTENTION:
When the chassis assembly is turned over under the conditions wherein the gear bracket and belt have been removed,
then the pulley gear as well as the gear, etc. constituting the
gear unit can possibly be separated to pieces. In such a case,
assemble these parts by referring to the assembly and configuration diagram in Fig. 21.
Gear bracket
Pulley gear
Belt
Motor pulley
Chassis assembly
u
Gear bracket
Fig.19
Actuator motor
v
v
Fig.20
Pulley gear
Belt
Motor pulley
I
Pawl
t
I
Fig.18
Assembly and Configuration Diagram
Pulley gear
Pulley gear
Gear B
Gear C
Select gear
Gross gear L
Fig.21
Gear B
Cylinder gea
Gross gear U
Gear C
(No.MB011)1-23
3.3.9 Removing the cams R1/R2 assembly and cam gear q
(See Fig.22)
(1) Remove the slit washer fixing the cams R1 and R2 assem-
bly.
(2) By removing the two pawls w fixing the cam R1, separate
R2 from R1.
(3) Remove the slit washer fixing the cam gear q .
(4) Pull out the cam gear q from the C.G. base assembly.
3.3.10 Removing the C.G. base assembly
(See Fig.22 and 23)
(1) Remove the three screws J retaining the C.G. ba se as-
sembly.
CAUTION:
To reassemble the cylinder gear, etc.with the cam unit (cam
gear and cans R1/R2 assembly), gear unit and drive unit, align
the position of the pawl x on the drive unit to that of the notch
on the cam gear q . Then, make sure that the gear unit is engaged by turning the cam gear q .
Slit washer
Cam gear q
J
Slit washer
Cam R2
Pawl
w
Cam R1
Cam switch board
C.G. base assembly
Pawl
w
Notch
Pawl
x
Cylinder
gear
Drive unit
Fig.22
Cam gear q
Cam R1, R2 assembly
Gear unit
Gear bracket
Fig.23
1-24 (No.MB011)
3.3.11 Removing the Pickup unit
(See Fig.24 and 25)
(1) Turn the cam gear in the direction of the arro w to move the
pickup unit toward the center.
(2) Extend the guide shaft stopper in the direction of the arrow,
move the guide shaft and pull out as shown in the figure.
(3) Pull out the pickup unit from the joint a.
CAUTION:
When reassenbling, attch the pickup unit to the chassis
base firmly at the joint a.
(4) Release the four joint b on the back on the pi ckup unit to
remove the CD rack.
Joint a
Pickup unit
Pickup unit
Chassis base
Guide shaft
Cam gear
Guide shaft stopper
Guide shaft
Joint b
Guide shaft
Guide shaft stopper
Fig.24
Pickup unit
Joint b
Joint b CD rack
Fig.25
(No.MB011)1-25
3.3.12 Removing the CD mechanism board
(See Fig.26)
(1) On the back of the CD mechanism assembly, unsolder the
four soldering c attaching the CD mechanism board, the
spindle motor and the feed motor.
(2) Removing the screw A.
3.3.13 Removing the Spindle motor/Feed motor
(See Fig.27)
• Prior to performing the following procedure,remove the CD
mechanism board.
(1) Form the top side of the CD mechanism assembly, remove
the two screws B and two screws C attaching the spindle
motor and the feed motor respsctively.
Soldering c
Spindle motor
Soldering c
Spindle motor
CD mechanism board
A
Feed motor
Fig.26
B
Feed motor
Fig.27
C
1-26 (No.MB011)
3.4 Cassette mechanism assembly
3.4.1 Removing the R/P & E head
(See Fig. 1 to Fig. 3)
(1) While shifting the trigger arms seen on the right side of the
head mount in the arrow direction, turn the flywheel ( R ) in
counterclockwise direction until the head mount has gone
out with a click (See Fig. 1).
(2) When the flywheel (R) is rotated in counterclockwise
direction, the playback / recording & eraser head will be
turned in counterclockwise direction from the position in
Fig. 2 to that in Fig. 3.
(3) At this position, disconnect the flexible board (outgoing
from the playback / recording & eraser head) from the
connector CN31
control board.
(4) Remove the flexible board from the chassis base.
(5) Remove the spring a from behind the playback / recording
& eraser head.
(6) Loosen the reversing azimuth screw retaining the playback
/ recording & eraser head.
(7) Take out the playback / recording & eraser head from the
front of the head mount.
(8) The playback / recording & eraser head should also be
removed similarly to steps 1 to 7 above.
on the head amplifier & mechanism
Head mount
Flexible board
Cassette mechanism
Fig.1
Playback head
Fly
wheel R
Trigger arm
(A mechanism side)
Spring a
Trigger arm
CN301
Head amp. & Mechanism
control board
R/P E head
Spring a
CN302
FPC holder
Flywheel R
(A mechanism side)
Fig.2
Reverse
Azimuth screw
Head mount
Flexible board
Head amp. & mechanism
control board
(B mechanism side)
Fig.3
(No.MB011)1-27
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