JVC MX-GA8 User manual

SERVICE MANUAL
COPYRIGHT © 2003 VICTOR COMPANY OF JAPAN, LIMITED No.MB080
2004/1
COMPACT COMPONENT SYSTEM
MB080200312 MX-GA8
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24
SP-MXGA8 SP-MXGA8CA-MXGA8
CD 1
DISC CHANGE
DISPLAY
CD
2
CD 3
TUNING
STANDBY
RANDOM
PROGRAM
DUBBING
REC START
/ STOP
CD REC
START
SET
CLOCK
/ TIMER
CANCEL
/ DEMO
SOUND
TURBO
TAPE A/ B
REPEAT
PHONES
TUNING
COMPACT COMPONENT SYSTEM MX-GA8
ROCK
POP
CLASSIC
DANCE
HALL
STADIUM
S
O
U
N
D
M
O
D
E
V
O
L
U
M
E
EJECTEJECT
SUBWOOFER LEVEL
PRESET
STANDBY/ON
BEEP
Area Suffix
JW ------- Mexico,Panama

1-2 (No.MB080)
SPECIFICATION
Design and specifications are subject to change without notice.
Amplifier section Output Power SUBWOOFERS 120 W per channel, min. RMS, driven into 6 Ωat 63 Hz with no more
than 10% total harmonic distortion.
MAIN SPEAKERS 60 W per channel, min. RMS, driven into 4 Ωat 1 kHz with no more
than 10% total harmonic distortion.
Audio input sensitivity/
Impedance
(at 1 kHz, measured at
MAIN SPEAKERS)
AUX 400 mV/50 kΩ
Speakers/Impedance Subwoofers 6 Ω- 16 Ω
Main speakers 4 Ω- 8 Ω
Tuner FM tuning range 87.50 MHz - 108.00 MHz
AM tuning range 530 kHz - 1 710 kHz
CD player CD Capacity 3 CDs
Dynamic range 85 dB
Signal-to-noise ratio 85 dB
Cassette deck Frequency response
Normal (type I) 50 Hz - 14 000 Hz
Wow and flutter 0.15% (WRMS)
General Power requirement AC 120 V , 60 Hz
Power consumption 160 W (at operation)
18 W (on standby)
Dimensions (approx.) 270 mm ×317 mm ×453 mm (W/H/D)
Mass (approx.) 8.8 kg
Speaker section Type 3-way bass-reflex type
Speaker units Subwoofer 13.5 cm cone ×1
Main Woofer 16 cm cone ×1
Tweeter 5 cm cone ×1
Power handling capacity Subwoofer 120 W
Main speaker 60 W
Impedance Subwoofer 6 Ω
Main speaker 4 Ω
Frequency range Subwoofer 30 Hz - 70 Hz
Main speaker 70 Hz - 20 000 Hz
Sound pressure level Subwoofer 73 dB/W·m
Main speaker 86 dB/W·m
Dimensions (approx.) 290 mm ×317 mm ×336 mm (W/H/D)
Mass (approx.) 5.5 kg each

(No.MB080)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.MB080)
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 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 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 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.
1M
Conductive material
(conductive sheet) or iron palate
(caption)
Anti-static wrist strap
Soldering
Card wire
Card wire
Picup unit
connector
Picup unit
connector
CD changer unit
CD changer
mechanism

(No.MB080)1-5
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.

1-6 (No.MB080)
SECTION 3
DISASSEMBLY
3.1 Main body
3.1.1 Removing the metal cover
(See Fig. 1)
(1) Remove the three screws Aattaching the metal cover on
the back of the body.
(2) Remove the six screws Battaching the metal cover on both
sides of the body.
(3) Remove the metal cover from the body by lifting the rear
part of the cover.
ONE POINT
How to eject the CD tray manually (see fig. 2)
Turn the loading pulley gear at the bottom of the CD changer
unit as shown in Fig.2 and draw the CD tray toward the front.
Fig.1
Fig.2
3.1.2 Removing the CD tray fitting
(See Fig. 3)
• Prior to performing the following procedure, eject the CD tray.
(1) After drawing the lower part of the tray fitting toward the
front, remove the five claws. Then, while moving the tray fit-
ting upward, remove it.
Fig.3
Metal cover
A
B
(both sides)
Loading pulley gear
(See <CD changer unit>fig.1)
Joint
Claw
CD tray fitting

(No.MB080)1-7
3.1.3 Removing the CD changer unit
(See Fig. 4 to 7)
• Prior to performing the following procedure, remove the metal
cover and CD tray fitting.
(1) Remove the card wire attached to CD changer unit on the
adhesion tape.
(2) Disconnect the card wire from the connector CW105 on the
CD board.
(3) Disconnect the harness from the connector CW104 on the
main board.
(4) Remove the two screws Cattaching the CD changer unit to
the rear panel.
(5) Remove the two screws Dattaching the CD changer unit to
both sides of the front panel assembly.
(6) Draw the CD changer unit upward from behind while pull-
ing the rear panel outward.
Fig.4
Fig.5
Fig.6
Fig.7
CD changer unit
Card wire
A
dhesion tape
CW104
CD board
CD changer unit
Main board
CW105
Rear panel
C
D
(both sides)
Rear panel
CD changer unit
Front panel
assembly

1-8 (No.MB080)
3.1.4 Removing the front panel assembly
(See Fig. 8 to 10)
• Prior to performing the following procedure, remove the metal
cover and CD changer unit.
(1) Disconnect the card wire from the connector CW101 on the
main board.
(2) Disconnect the harness from the connector CW108,
CW109 and CW110 on the main board.
(3) Remove the screw Efixiing the lug wire.
(4) Remove the two screws Fattaching the front panel assem-
bly to both sides of the body.
(5) Remove the screw Gattaching the main board to the front
panel assembly.
(6) Remove the screw Hattaching the front panel assembly to
bottom of the body.
(7) Release the two joints1 and two joints2, and detach the
front panel assembly toward the front.
Fig.8
Fig.9
Fig.10
Main board
Amp. board
CW101
CW109
CW110
CW108
ACW1
ACW2
Front panel
assembly
Joint1
(both sides)
F
(both sides)
E (fixing the lug wire)
Joint1
(both sides)
F
(both sides)
Front panel
assembly
G
Main board
H
Joint2

(No.MB080)1-9
3.1.5 Removing the heat sink & amp. Board
(See Fig. 8, 11 and 12)
• Prior to performing the following procedure, remove the metal
cover and CD changer unit.
(1) Disconnect the card wire from the connector ACW1 and
the harness from the connector ACW2 on the amp. board.
(2) Remove the four screws Iattaching the heat sink cover to
the rear panel. Remove the heat sink cover.
(3) Remove the four screws Jattaching the heat sink and two
screws Kattaching the speaker terminal to the rear panel.
(4) After moving the heat sink upward, remove the claws. Then
pull out the heat sink & amp. board inward.
3.1.6 Removing the tuner board
(See Fig. 12 and 13)
• Prior to performing the following procedure, remove the metal
cover.
(1) Disconnect the card wire from the connector CON01 on the
tuner board.
(2) Remove the two screws Lattaching the tuner board to the
rear panel.
3.1.7 Removing the rear panel
(See Fig. 12)
• Prior to performing the following procedure, remove the metal
cover, CD changer unit, heat sink & amp. board and tuner
board.
(1) Remove the screw Mand three screws Nattaching the rear
panel.
Fig.11
Fig.12
Fig.13
Rear panel
Heat sink
cover
I
I
Speaker
terminal
K
L
M
Rear panel
Heat sink
Claws
N
J
J
Main board
Tuner board
CON01
Rear panel

1-10 (No.MB080)
3.1.8 Removing the main board
(See Fig. 14)
• Prior to performing the following procedure, remove the metal
cover, CD changer unit and rear panel.
(1) Disconnect the card wire from the connector CW101 and
the harness from the connector CW108, CW109 and
CW110 on the main board.
(2) Disconnect the harness from the connector PCW1 on the
fuse board.
(3) Remove the screw Gattaching the main board to the front
panel assembly. (See Fig.9)
(4) Remove the two screws Oattaching the heat sink to the
bottom chassis.
3.1.9 Removing the power cord
(See Fig. 14)
• Prior to performing the following procedure, remove the metal
cover, CD changer unit and rear panel.
(1) Disconnect the power cord from the connector PW101 on
the power supply board and pull up the power cord stopper
upward. Fig.14
3.1.10 Removing the power ICs
(See Fig. 15 and 16)
• Prior to performing the following procedure, remove the metal
cover, CD changer unit and heat sink & amp. board.
(1) Unsolder the power ICs solder points.
(2) Remove the four screws Pattaching the power ICs to the
heat sink.
Fig.15
Fig.16
3.1.11 Removing the power transformer
(See Fig. 17)
• Prior to performing the following procedure, remove the metal
cover, CD changer unit and heat sink & amp. board.
(1) Disconnect the power cord from the connector PW101 on
the power supply board.
(2) Disconnect the harness from the connector PCW1 on the
fuse board.
(3) Remove the four screws Qattaching thepower transformer
on the bottom chassis.
Fig.17
Power supply
board
Fuse board
Power cord
Bottom chassis
Power cord
stopper
O
Heat sink
CW101
CW109
PW101
CW110
PCW1
Main board
CW108
Heat sink
Power ICs solder point
Amp. board
(reverse side)
Heat sink
Amp. board
P
Power supply
board
Fuse board
Q
PW101
Power transformer
PCW1
Bottom
chassis

(No.MB080)1-11
3.2 Front panel assembly
• Prior to performing the following procedure, remove the front
panel assembly.
3.2.1 Removing the CD switch board
(See Fig. 1)
(1) Disconnect the card wire from the connector UCW03 on
the CD switch board.
(2) Remove the four screws Aattaching the CD switch board.
3.2.2 Removing the front board
(See Fig. 1 and 2)
(1) Pull out the sound mode knob, volume knob, and preset
knob from the front side of front panel assembly.
(2) Disconnect the card wire from the connector UCW02 on
the front board and the connector on the mecha. board.
(3) Remove the fourteen screws Battaching the front board.
(4) Disconnect the card wire from the connector UCW01 on
the front board. Fig.1
Fig.2
3.2.3 Removing the headphone jack board
(See Fig. 3)
• Prior to performing the following procedure remove the front
board.
(1) You can pull out the headphone jack board.
3.2.4 Removing the cassette mechanism assembly
(See Fig. 3)
(1) Disconnect the card wire from the connector on the mecha.
board.
(2) Remove the six screws Cattaching the cassette mecha-
nism assembly.
Fig.3
A
B
B
CD switch board
Front board
UCW03
Connector
UCW01
UCW02
Mecha.
board
Sound mode knob
Volume knob
Preset knob
Connector
Headphone
jack board
Mecha.
board
Cassette mechanism
assembly
C
C
C
(fixing the lug wire)

1-12 (No.MB080)
3.3 CD changer unit
• Prior to performing the following procedure, remove the CD
changer unit.
3.3.1 Removing the CD tray
(See Fig. 1 and 2)
(1) Turn the black loading pulley gear on the under side of the
CD changer unit in the direction of the arrow and draw the
CD tray toward the front until it stops.
(2) Disconnect the card wire from connector CW103 on the CD
board.
(3) Push down the two tray stoppers marked a and pull out the
CD tray.
Fig.1
Fig.2
3.3.2 Reinstall the CD tray
(See Fig. 3 and 4)
(1) Align the gear-cam with the gear-tray as shown fig.3, then
mount the CD tray.
(2) When assembling the CD tray, take extreme care not en-
gage with gear - synchro.
Fig.3
Fig.4
Loading pulley
gear
CW103
CD tray
CD board
CD tray
CW103
(on the CD board)
a
(Tray stopper)
a (Tray stopper)
Gear-convert
Gear-convert
Gear-cam
Gear-tray
Gear-tray
Gear-tray
Gear-cam
timing point
Gear-synchro
CD tray

(No.MB080)1-13
3.3.3 Removing the sensor board
(See Fig. 5)
• Prior to performing the following procedure, remove the CD
tray.
(1) Remove the screw Aattaching the sensor board on the CD
tray.
(2) Remove the sensor board releasing the two tabs a.
(3) Disconnect the harness from the connector CW1 on the
sensor board.
Fig.5
3.3.4 Removing the turn tray motor
(See Fig. 6 and 7)
• Prior to performing the following procedure, remove the CD
tray and sensor board.
(1) Remove the screw Battaching the turn tray. Detach the
turn tray from the base tray.
(2) Pull outward the tab battaching the turn tray motor on the
base tray and detach the turn tray motor.
Fig.6
Fig.7
Tab a
Sensor board
CW1
A
Turn tray
Base tray
B
Tab b
Turn tray moto
r

1-14 (No.MB080)
3.3.5 Removing the belt, the CD board and the switch
board
(See Fig. 8 and 9)
• Prior to performing the following procedure, remove the CD
tray.
(1) Detach the belt from the pulley on the upper side of the CD
changer unit (Do not stain the belt with grease).
(2) Disconnect the card wire from the pickup unit connector on
the under side of the CD changer unit.
Attention :
Solder is put up before the card wire is removed from the
pick-up unit connector on the CD mechanism assembly.
(When the card wire is removed without putting up sol-
der, the CD pick-up unit assembly might destroy.)
(3) Disconnect the motor wire harness from connector on the
CD board.
(4) Remove the screw Cattaching the switch board and re-
lease the two tabs eattaching the switch board outward
and detach the switch board.
(5) Remove the two screws Dattaching the CD board. First re-
lease the two tabs fand two tabs gattaching the motor,
then release the CD board.
∗If the tabs fand g are hard to release, it is recommendable
to unsolder the two soldered parts on the motor terminal of
the CD board.
Fig.8
Fig.9
Belt
CD changer unit
Soldering
Card wire
Picup unit
connector
D
CD board
Tabs g
Tabs f
Soldered parts
Motor
Switch board
CW3
C
Tabs e
CD mechanism board
motor connecter
Pickup unit connector

(No.MB080)1-15
3.3.6 Removing the CD mechanism holder assembly
(mechanism included)
(See Fig. 10 to 13)
(1) Disconnect the harness from connector on the CD mecha-
nism board in the CD mechanism assembly on the under
side of the CD changer unit. Disconnect the card wire from
the pickup unit connector.
Attention :
Solder is put up before the card wire is removed from the
pick-up unit connector on the CD mechanism assembly.
(Refer to Fig.9) (When the card wire is removed without
putting up solder, the CD pick-up unit assembly might
destroy.)
(2) Remove the screw Eattaching the shaft on the right side of
the CD mechanism holder assembly. Pull outward the
stopper fixing the shaft on the left side and remove the CD
mechanism holder assembly from behind in the direction of
the arrow y.
(3) Turn the CD mechanism holder assembly half around the
lift up slide shaft hof the CD mechanism holder assembly
until the turn table is reversed, and pull out the CD mecha-
nism holder assembly.
Fig.10
Fig.11
Fig.12
Fig.13
Motor connecter
CD mechanism holder assembly
CD changer unit
Pickup unit connector
E
CD mechanism holder assembly
Stopper
CD mechanism holder assembly
Lift up slide shaft n
y
Lift up slide shaft
CD mechanism holder assembly

1-16 (No.MB080)
3.4 CD mechanism section
• Removing the CD mechanism holder from the CD chager unit.
(Refer to "Removing the CD mechanism holder assembly" )
3.4.1 Removing the pickup unit
(See Fig. 1)
(1) Removing the cut washer on the feed gear sleeve and pull
out the feed gear.
(2) Remove the two screws Afixing the pickup shaft.
(3) Removing the pickup unit.
3.4.2 Removing the motor board
(See Fig. 2)
(1) Unsolder the motor terminal on the motor board.
(2) Remove the moter board.
3.4.3 Removing the feed motor
(See Fig. 1)
(1) Remove the two motor fixing screws at Band removing the
feed motor.
3.4.4 Removing the spindle motor
• The spindle motor cannot be removed as a single unit.
• When removing the spindle motor, change the chasis and turn-
table together as aunit.
Fig.1
Fig.2
Cut washer
A
A
B
Shaft
Feed Gear
Shutter
Pickup unit
Unsolder
Motor board Unsolder Feed motor
Spindle motor

(No.MB080)1-17
3.5 Cassette mechanism section
• Prior to performing the following procedure, remove the cas-
sette mechanism assembly.
3.5.1 Removing the R/P head.
(See Fig. 1 and 2)
(1) Remove the screw Aon the right side of the R/P head.
(2) Remove the screw Bon the left side of the R/P head.
3.5.2 Remove the erase head.
(See Fig. 1)
(1) Remove the screw Cfixing the erase head.
Fig.1
Fig.2
3.5.3 Remove the pinch roller.
(See Fig. 3)
(1) Pull out the pinch roller stopper.
(2) Pull out the pinch roller.
Fig.3
R/P Head
E. Head
Pinch rolle
r
ABC
R/P Head
Spring
A
B
Pinch roller
Pinch roller
stopper

1-18 (No.MB080)
3.5.4 Removing the motor
(See Fig. 4 to 6)
(1) Slide the plastic cover in the direction of the arrow, and re-
move the three claws. Then remove the plastic cover.
(2) Remove the two screws Dfixing the motor. Be careful to
grease's splash when the drive belt comes off.
(3) Unsolder the motor terminal.
3.5.5 Removing the mechanism board
(See Fig. 5)
(1) Unsolder the four solder parts aand the four solder parts b.
(2) Remove the two screws Eattaching the mecha. board.
Fig.4
Fig.5
Fig.6
3.5.6 Removing the flywheel
(See Fig. 7 and 9)
(1) Remove the cut-washer at c from the capstan shaft, then
remove the flywheel.
When reassembling the flywheel, be sure to use new
washers as they cannot be reused.
Fig.7
Fig.8
Fig.9
Plastic cove
r
Claw
D
Drive belt
Drive belt
Motor
Motor
terminal
Mecha. board
E E
Solder
part
a
Solder
part
a
Solder
part
b
Drive belt
Drive belt
Moto
r
Capstan
washer
FR belt
Flywheel
c
FR belt
Washer
Sleeve

(No.MB080)1-19
3.6 Speaker section
• It is exchange in a unit.
Please do not decompose as much as possible.
3.6.1 Removing the side panel
(See Fig. 1)
(1) Remove the five screws Aattaching the side panel and re-
move the side panel.
Fig.1
3.6.2 Removing the side speaker
(See Fig. 2 and 3)
• Prior to performing the following procedure, remove the side
panel.
(1) Remove the four screws Battaching the side speaker.
(2) Pull out the side speaker and remove the speaker cord
from the speaker terminal.
Fig.2
Fig.3
Side panel
A
A
A
Side speaker
B
Side speaker
Speaker terminal

1-20 (No.MB080)
SECTION 4
ADJUSTMENT
4.1 Alignment and Adjustments
4.1.1 Tuner
* Adjustment Location of Tuner PCB
Fig 1-4 OSC Voltage
AM(MW) OSC
Adjustment
Output 1~7.0 0.5V
Received FREQ.
Adjustment
point
522~1611 KHz
MO
AM(MW) RF
Adjustment
ITEAM
594 KHz
MA
Maximum
Output(Fig1-4)
FM DET
AA
SVR1
AM IF
MO
MA
MAIN
PCB
VT GND TESTER