JVC HX-GD8 Service Manual
SERVICE MANUAL
COMPACT COMPONENT SYSTEM
MB18820044
HX-GD8
Area suffix
J ----------------------------- U.S.A.
C -------------------------- Canada
CA-HXGD8 SP-HXGD8SP-HXGD8
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-39
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-55
COPYRIGHT © 2004 VICTOR COMPANY OF JAPAN, LIMITED
No.MB188
2004/4
SPECIFICATION
Amplifier section CA-HXGD8
Output Power SUBWOOFERS 195 W per channel, min. RMS, driven into 6 Ω at 63 Hz with no more than 10 % total harmonic
MAIN SPEAKERS 80 W per channel, min. RMS, driven into 6 Ω at 1 kHz with no more than 10 % total harmonic
Audio input sensitivity/impedance (Measured at 1 kHz, with
tape recording signal 300 mV)
Digital output OPTICAL DIGITAL OUTPUT -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
COMPONENT
(interlace/ progressive)
Speaker
Terminals
Others AV COMPU LINK × 2 (Ø 3.5)
Tuner section FM tuning range 87.5 MHz - 108.0 MHz
AM tuning range 530 kHz - 1 710 kHz
Disc player section Playable disc DVD VIDEO/DVD AUDIO
Dynamic range 90 dB
Horizontal resolution 500 lines
Wow and flutter Immeasurable
Cassette deck section Frequency
response
General Power requirement AC 120 V , 60 Hz
Power consumption 265 W/ 325 VA (at operation)
Dimensions (approx.) (W/H/D) 205 mm × 370 mm × 432 mm
Mass (approx.) 11 kg (24.3 lbs)
Type 3-Way 4-Speaker Bass-Reflex Type
Speakers Subwoofer 20 cm (7 7/8 in.)cone × 1
Power handling capacity Subwoofer 195 W
Impedance Subwoofer 6 Ω
Frequency range Subwoofer 30 Hz - 970 Hz
Sound pressure level Subwoofer 83 dB/W·m
Dimensions (approx.) (W/H/D) 240 mm × 457 mm × 407 mm
Mass (approx.) 10 kg (22.1 lbs) each
MAIN SPEAKERS 6 Ω - 16 Ω ()
SUBWOOFERS 6 Ω - 16 Ω ()
Normal (type I) 50 Hz - 14 000 Hz
Wow and flutter 0.15 % (WRMS)
Woofer 13.5 cm (5 3/8in.) cone × 2
Tweeter 5 cm (2 in.) cone × 1
Main speaker 80 W
Main speaker 6 Ω
Main speaker 75 Hz 25 000 Hz
Main speaker 88 dB/W·m
Design and specifications are subject to change without notice.
distortion.
distortion.
AUX:300 mV/47 kΩ
C (chrominance, burst):0.286 V(p-p)/75 Ω
(Y):1 V(p-p)/75 Ω
(P B/PR):0.7 V(p-p)/75 Ω
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)
30 W (on standby)
(8 1/8 in. × 14 5/8 in. × 17 1/16 in.)
Speaker section SP-HXGD8
(9 1/2 in. × 18 in. × 16 1/16 in.)
1-2 (No.MB188)
SECTION 1
PRECAUTION
1.1 Safety Precautions
(1) This design of this product contains special hardware 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 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.).
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 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 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.MB188)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 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.
(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 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.
Short land sections
1-4 (No.MB188)
DVD pickup
DVD changer mechanism assembly
1.8 Importance administering point on the safety
Primary board (Forward side)
F102
F101
8A-125V
8A-125V
1.6A-125V
3.15A-125V
F104
F103
F001
6.3A-125V
Caution: For continued protection against risk of
fire, replace only with same type 6.3 A/125 V for
F001, 8 A/125 V for F101 and F102, 3.15 A/125 V
for F103, 1.6 A/125 V for F104.
This symbol specifies type of fast operating fuse.
Precaution: Pour eviter risques de feux, remplacez
le fusible de surete de F001 comme le meme type
que 6,3 A/125 V, 8 A/125 V pour F101 et F102, et
3,15 A/125 V pour F103, et 1,6 A/125V pour F104.
Ce sont des fusibles suretes qui functionnes rapide.
^
(No.MB188)1-5
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe ADJUSTMENT.
1-6 (No.MB188)
SECTION 3
r
DISASSEMBLY
3.1 Main body section
3.1.1 Removing the metal cover
(See Figs.1 to 3)
(1) From the back side of the main body, remove the six
screws A attaching the metal cover. (See Fig.1.)
(2) From the both sides of the main body, remove the two
screws B attaching the metal cover. (See Figs.2 and 3.)
(3) Remove the metal cover from the main body while lifting
the rear section of the metal cover in the direction of the arrow. (See Figs.2 and 3.)
Metal cover
A
Metal cover
A
A
Fig.1
B
Fig.2
Metal cove
B
Fig.3
(No.MB188)1-7
3.1.2 Removing the front panel assembly
(See Figs.4 to 7)
• Prior to performing the following procedures, remove the metal
cover.
(1) From the right side of the main body, disconnect the card
wires from the connectors (CN43
on the main board. (See Fig.4.)
(2) Disconnect the earth wire from the chassis base. (See
Fig.4.)
(3) From the top side of the main body, disconnect the parallel
wires from the connectors (CN201
board. (See Fig.5.)
Reference:
When reassembling, pass the parallel wire through the
hole a on the plastic chassis before connecting the parallel wire to the connector CN201
(See Fig.5.)
(4) From the left side of the main body, remove the tie band
bundling the wires. (See Fig.16.)
Reference:
After reassembling, bundle the wires with the new tie
band as before. (See Fig.16.)
(5) Disconnect the earth wire from the chassis base. (See
Fig.6.)
(6) From the both sides of the main body, remove the two
screws C attaching the front panel assembly. (See Figs.4
and 6.)
(7) From the bottom side of the main body, remove the three
screws D attaching the front panel assembly. (See Fig.7.)
(8) Release the joints b of the front panel assembly from the
chassis base and remove the front panel assembly in the
direction of the arrow. (See Figs.4, 6 and 7.)
Front panel assembly
Card wires
, CN44, CN802, CN803)
, CN205) on the bridge
on the bridge board.
Main board
CN802
Bridge board
CN201
Parallel wire
Parallel wire
CN205
Parallel wire
a
Plastic chassis
Fig.5
Front panel assembly
C
C
Earth wire
1-8 (No.MB188)
b
Card wires
Fig.4
CN43
CN44
CN803
Chassis base
Tie band
Chassis base
Front panel assembly
D
Fig.6
Fig.7
Earth wire
b
Chassis base
b
b
3.1.3 Removing the tuner
(See Figs.8 and 9)
• Prior to performing the following procedures, remove the metal
cover.
(1) From the right side of the main body, disconnect the card
wire from the connector CN560
Fig.8.)
(2) From the back side of the main body, remove the two
screws E attaching the tuner to the rear panel. (See Fig.9.)
3.1.4 Removing the video board
(See Figs.8 and 9)
• Prior to performing the following procedures, remove the metal
cover.
(1) From the right side of the main body, disconnect the card
wire from the connector CN502
Fig.8.)
(2) From the back side of the main body, remove the two
screws F attaching the video board to the rear panel. (See
Fig.9.)
on the main board. (See
on the main board. (See
Video board
CN502
Tuner
Fig.8
F
Card wires
CN560
Main board
Rear panel
E E
Fig.9
(No.MB188)1-9
3.1.5 Removing the rear panel
r
(See Figs.10 to 12)
• Prior to performing the following procedures, remove the metal
cover.
(1) From the top side of the main body, remove the tie band
bundling the wires. (See Fig.10.)
Reference:
After reassembling, bundle the wires with the new tie
band as before. (See Fig.10.)
(2) Disconnect the wire from the connector CN202
bridge board. (See Fig.10.)
(3) From the back side of the main body, remove the two
screws G and screw H attaching the rear cover. (See
Fig.11.)
(4) Release the sections c and remove the rear cover. (See
Fig.11.)
(5) Remove the sixteen screws J attaching the rear panel.
(See Fig.12.)
(6) From the both sides of the main body, release the joints d
attaching the rear panel to the chassis base and remove
the rear panel with the fan. (See Fig.12.)
on the
Tie band
Bridge board
CN202
Wires
3.1.6 Removing the fan
(See Figs.10 to 12)
• Prior to performing the following procedures, remove the metal
cover.
(1) From the top side of the main body, remove the tie band
bundling the wires. (See Fig.10.)
Reference:
After reassembling, bundle the wires with the new tie
band as before. (See Fig.10.)
(2) Disconnect the wire from the connector CN202
bridge board. (See Fig.10.)
(3) From the back side of the main body, remove the two
screws G and screw H attaching the rear cover. (See
Fig.11.)
(4) Remove the two screws K attaching the fan. (See Fig.12.)
(5) Take out the fan from the main body.
on the
H
c
Rear panel
J
Fig.10
G
c
c
Fig.11
Rear cove
J
Fan
1-10 (No.MB188)
KK
J
J
dd
J
Fig.12
3.1.7 Removing the main board
(See Figs.13 and 14)
• Prior to performing the following procedures, remove the metal
cover, tuner, video board and rear panel.
(1) From the right side of the main body, disconnect the card
wires from the connectors (CN43
, CN803) on the main board. (See Fig.13.)
CN802
(2) Disconnect the parallel wires from the connector CN715 on
the forward side of the main board. (See Fig.13.)
(3) Remove the two screws L attaching the main board. (See
Fig.14.)
(4) Disconnect the connector CN217
ward this side and disconnect the connector CN501
main board in the direction of the arrow. (See Fig.14.)
Reference:
• When attaching the main board, insert the sections e of the
bridge board in the hole of the main board. (See Fig.14.)
• Insert the section f of the main board in the hole of the chassis base before attaching the screws L.
, CN44, CN110, CN111,
on the main board to-
on the
Card wires
CN802
CN110
Main board
CN803
CN715
CN111
Card wires
Bridge board
L
CN44
Fig.13
e
f
Fig.14
CN43
Main board
L
CN217
e
CN501
Main board
Chassis base
(No.MB188)1-11
3.1.8 Removing the main amplifier board/subwoofer amplifier boards
(See Figs.15 to 17)
• Prior to performing the following procedures, remove the metal
cover, tuner, video board, rear panel and main board.
(1) From the top side of the main body, disconnect the wires
from the connector (CN206
(See Fig.15.)
(2) From the back side of the main body, remove the tie band
bundling the wires. (See Fig.16.)
Reference:
After reassembling, bundle the wires with the new tie
band as before. (See Fig.16.)
(3) Disconnect the connectors (CN600
amplifier/subwoofer amplifier boards from the connection
board in the direction of the arrow. (See Fig.16.)
(4) Remove the two screws M and screw N attaching the main
amplifier board. (See Fig.17.)
(5) Removing the two screws P and screw Q attaching the
subwoofer amplifier board. (See Fig.17.)
, CN208) on the bridge board.
, CN700) on the main
Wires
Main amplifier board
Tie band
Bridge board
CN206CN208
Fig.15
Subwoofer amplifier board
Wires
Heat sink
CN600 CN700
Connection board
Fig.16
P
Q
Subwoofer amplifier board
Fig.17
M
N
Main amplifier board
1-12 (No.MB188)
3.1.9 Removing the connection board
r
(See Fig.18.)
• Prior to performing the following procedure, remove the metal
cover, tuner, video board, rear panel, main board and main
amplifier/subwoofer amplifier boards.
(1) From the top side of the main body, remove the two screws
R attaching the connection board on the chassis base.
Reference:
When reassembling, attach the connection board to the section g and align the projection h of the chassis base to the hole
of the connection board.
R
Connection board
g
h
3.1.10 Removing the bridge board
(See Figs.19 and 20)
• Prior to performing the following procedures, remove the metal
cover, tuner, video board, rear panel and main board.
(1) From the top side of the main body, release the wire holder
bundling the wire. (See Fig.19.)
(2) Disconnect the wires from the connectors (CN206
) on the bridge board. (See Fig.19.)
CN214
Reference:
After connecting the wire to the connector CN214
wire with the wire holder. (See Fig.19.)
(3) Disconnect the parallel wires from the connectors (CN201
CN205, CN213) on the bridge board. (See Fig.19.)
(4) Release the wire holder holding the card wire. (See
Fig.19.)
(5) Remove the spacer fixing the wire on the bridge board.
(See Fig.19.)
(6) Remove the two screws S attaching the bridge board on
the 5DVD changer mechanism assembly. (See Fig.20.)
(7) Bend the claw i in the direction of the arrow and remove the
bridge board in an upward direction. (See Fig.20.)
Reference:
• When attaching the bridge board, align the projections (j, k)
in the hole of the bridge board. (See Fig.20.)
• When reassembling, pass the wires through the sections
(m, n) of the plastic chassis. (See Fig.19.)
, CN208,
, fix the
Chassis base
Bridge board
Wire
Wires
CN208
,
CN206
j
Spacer
CN213CN201
k
R
Fig.18
Wire holder
Card wire
m
Fig.19
Bridge board
S
Parallel wire
CN205
CN214
n
Wire holder
S
i
Fig.20
5DVD change
mechanism
assembly
(No.MB188)1-13
3.1.11 Removing the 5DVD changer mechanism assembly
(See Figs.21 to 23)
• Prior to performing the following procedures, remove the metal
cover, tuner, video board, rear panel, main board and bridge
board.
(1) From the both sides of the main body, remove the two
screws T attaching the 5DVD changer mechanism assembly to the front panel assembly. (See Figs.21 and 22.)
(2) From the left side of the main body, remove the tie band
bundling the wire and parallel wires. (See Fig.22.)
Reference:
After reassembling, bundle the wire and parallel wires
with the new tie band as before. (See Fig.22.)
(3) Take out the 5DVD changer mechanism assembly from the
main body.
Reference:
When attaching the 5CD changer mechanism assembly,
pass the wires through the sections (m, n) of the plastic
chassis. (See Fig.22.)
(4) From the both and top sides of the 5DVD changer mecha-
nism assembly, remove the two screws U and screw U' attaching the main chassis. (See Fig.23.)
Reference:
• Align the projections s of the plastic chassis to the
holes of the main chassis before attaching the screw
U'. (See Fig.23.)
• When attaching the screw U', attach the earth wire
with it. (See Fig.23.)
(5) Take out the main chassis.
(6) From the top side of the 5DVD changer mechanism as-
sembly, remove the three screws V and screw V' attaching
the 5DVD changer mechanism assembly on the plastic
chassis.
Reference:
• When reassembling, align the projections (p, q, r) of the
plastic chassis to the holes of the 5DVD changer mechanism
assembly before attaching the screws V and V'. (See
Fig.23.)
• When attaching the screw V', attach the earth wire with it.
(See Fig.23.)
Front panel assembly
5DVD changer mechanism assembly
T
5DVD changer
mechanism assembly
m
Fig.21
Front panel assembly
Tie band
Wires
T
n
Fig.22
1-14 (No.MB188)
5DVD changer
mechanism assembly
V
Main chassis
V
r
V
U
U
Fig.23
p
V
Plastic chassis
s
U'
s
Earth wire
V'
q
3.1.12 Removing the primary board
Y
(See Figs.19, 21, 22, 24 and 25)
• Prior to performing the following procedures, remove the metal
cover, tuner, video board, rear panel and main board.
(1) From the top side of the main body, release the wire holder
bundling the wire. (See Fig.19.)
(2) Disconnect the wires from the connectors (CN206
CN214) on the bridge board. (See Fig.19.)
Reference:
After connecting the wire to the connector CN214
wire with the wire holder. (See Fig.19.)
(3) Disconnect the parallel wires from the connectors (CN201
, CN213) on the bridge board. (See Fig.19.)
CN205
(4) Release the wire holder holding the card wire. (See
Fig.19.)
(5) Remove the spacer fixing the wire on the bridge board.
(See Fig.19.)
(6) From the both sides of the main body, remove the two
screws T attaching the 5DVD changer mechanism assembly to the front panel assembly. (See Figs.21 and 22.)
Reference:
It is not necessary to remove the bridge board from the
5DVD changer mechanism assembly.
(7) Take out the 5DVD changer mechanism assembly with the
bridge board from the main body.
Reference:
When attaching the 5DVD changer mechanism assembly, pass the wires through the sections (m, n) of the
5DVD changer mechanism assembly. (See Fig.22.)
(8) From the top and left sides of the main body, remove the
four screws W and screw X attaching the primary board on
the chassis base. (See Figs.24 and 25.)
(9) From the forward side of the primary board, disconnect the
power cord from the connector CN200
. (See Fig.25.)
, CN208,
, fix the
Primary board
,
W
Chassis base
Fig.24
Primary board
CN200
Chassis basePower cord
W
X
Fig.25
3.1.13 Removing the FL board
(See Fig.26)
• Prior to performing the following procedures, remove the metal
cover and front panel assembly.
(1) From the inside of the front panel assembly, remove the
soldered sections (t, u) on the FL board to remove the parallel wires.
(2) Disconnect the card wire from the connector CN902
FL board.
(3) Remove the four screws Y attaching the FL board.
Reference:
When attaching the FL board, align the projections v of the
front panel assembly in the holes of the FL board before attaching the screws Y.
on the
Front panel assembly
v
Y
Y
t
Card wire
Parallel wire
CN902
Fig.26
FL board
Y
Parallel wire
v
u
(No.MB188)1-15
3.1.14 Removing the switch board
(See Fig.27)
• Prior to performing the following procedures, remove the metal
cover and front panel assembly.
(1) From the inside of the front panel assembly, remove the
three screws Z attaching the switch board.
(2) Take out the switch board and remove the soldered section
w on the switch board to remove the parallel wire.
Reference:
When attaching the switch board, align the projections x in the
holes of the switch board before attaching the screws Z.
3.1.15 Removing the standby LED board
(See Fig.27)
• Prior to performing the following procedures, remove the metal
cover and front panel assembly.
(1) From the inside of the front panel assembly, remove the
two screws AA attaching the standby LED board.
(2) Take out the standby LED board and remove the soldered
section y on the standby LED board to remove the parallel
wire.
Reference:
When attaching the standby LED board, align the projections
z in the holes of the standby LED board before attaching the
screws AA.
Z
x
Z
x
Z
w
Parallel wires
Switch board
Front panel assembly
x
Fig.27
z
Standby LED board
AA
z
AA
y
1-16 (No.MB188)
3.1.16 Removing the encoder board
(See Figs.26 to 29)
• Prior to performing the following procedures, remove the metal
cover and front panel assembly.
(1) From the outside of the front panel assembly, pull out the
knobs toward this side. (See Fig.28.)
(2) From the inside of the front panel assembly, disconnect the
card wire from the connector CN902
Fig.26.)
(3) Remove the four screws Y, three screws Z and two screws
AA attaching the each board. (See Figs.26 and 27.)
(4) Take out the FL board with the switch and standby LED
boards.
Reference:
It is not necessary to remove the parallel wires.
(5) Remove the eight screws AB attaching the encoder board.
(See Fig.29.)
Reference:
When attaching the encoder board, align the projections aa of
the front panel assembly in the holes of the encoder board before attaching the screws AB. (See Fig.29.)
on the FL board. (See
Volume knob
Sound mode knob
Preset knob
Front panel assembly
Fig.28
Encoder boardFront panel assembly
AB
AB
aa
aa
AB
AB
Fig.29
(No.MB188)1-17
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