Page 1
SERVICE MANUAL
COMPACT COMPONENT SYSTEM
MB16120043
HX-GX7
Area suffix
J ----------------------------- U.S.A.
C -------------------------- Canada
CA-HXGX7 SP-HXGX7SP-HXGX7
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-37
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-41
COPYRIGHT © 2004 VICTOR COMPANY OF JAPAN, LIMITED
No.MB161
2004/3
Page 2
SPECIFICATION
Amplifier section-CA-HXGX7
Output Power
SUBWOOFERS 180 W per channel, min. RMS, driven into 6 Ω at 63 Hz with no more than 10 %total
harmonic distortion.
MAIN SPEAKERS 80 W per channel, min. RMS, driven into 6 Ω at 1 kHz with no more than 10 %total
harmonic distortion.
Audio input sensitivity/impedance (Measured at 1 kHz, with tape recording signal 300 mV)
AUX 300 mV/47 kΩ
Speakers/impedance SUBWOOFERS 6 Ω - 16 Ω
MAIN SPEAKERS 6 Ω - 16 Ω
Tuner
FM tuning range 87.5 MHz - 108.0 MHz
AM tuning range 530 kHz - 1 710 kHz
CD player
CD capacity 5 discs
Dynamic range 87 dB
Signal-to-noise ratio 90 dB
Wow and flutter Immeasurable
MP3 recording format MPEG 1/2 Audio Layer 3
Max. Bit rate 320 kbps
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 245 W/310 VA (at operation) 26 W (on standby)
Dimensions (approx.) 205 mm × 370 mm × 432 mm (W/H/D) (8 1/8 in. × 14 5/8 in. × 17 1/0 16 in.)
Mass (approx.) 10.5 kg (23.2 lbs)
Speaker section-SP-HXGX7
Type 3-Way 4-Speaker Bass-Reflex Type
Speaker Systems Subwoofer 16 cm (6 5/16 in.) cone × 1
Woofer 12 cm (4 3/4 in.) cone × 2
Tweeter 5 cm (2 in.) cone × 1
Power handling capacity Subwoofer 360 (180 + 180) W
Main speaker 160 (80 + 80) W
Impedance Subwoofer 6 Ω
Main speaker 6 Ω
Frequency range Subwoofer 27 Hz - 1000 Hz
Main speaker 70 Hz - 25 000 Hz
Sound pressure level Subwoofer 78 dB/W·m
Main speaker 88 dB/W·m
Dimensions (approx.) 227 mm × 432 mm × 376 mm (W/H/D) (8 15/16 in. × 17 1/16 in. × 14 13/16 in.)
Mass (approx.) 8 kg (17.7 lbs) each
Design and specifications are subject to change without notice.
1-2 (No.MB161)
Page 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 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.MB161)1-3
Page 4
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 round
Card wire
1-4 (No.MB161)
Pickup
Flexible board
Page 5
1.8 Importance administering point on the safety
F102
F101
8A-125V
8A-125V
3.15A-125V
F104
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 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 F104.
Ce sont des fusibles suretes qui functionnes rapide.
^
(No.MB161)1-5
Page 6
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.
1-6 (No.MB161)
Page 7
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
A
Metal cover
A
Fig.1
B
Fig.2
Metal cove
B
Fig.3
(No.MB161)1-7
Page 8
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) Disconnect the earth wire from the chassis base. (See
Fig.6.)
(5) From the both sides of the main body, remove the two
screws C attaching the front panel assembly. (See Figs.4
and 6.)
(6) From the bottom side of the main body, remove the three
screws D attaching the front panel assembly. (See Fig.7.)
(7) 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
Earth wire
b
Card wires
Fig.4
CN43
CN44
CN803
Chassis base
Chassis base
Front panel assembly
D
C
b
Earth wire
Fig.6
b
1-8 (No.MB161)
Fig.7
Chassis base
b
Page 9
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.)
on the main board. (See
CN560
Tuner Main board
Fig.8
Card wires
E
Rear panel
Fig.9
(No.MB161)1-9
Page 10
3.1.4 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, disconnect the wire
from the connector CN202
Fig.10.)
(2) From the back side of the main body, remove the screw F
and two screws G attaching the rear cover. (See Fig.11.)
(3) Release the sections d and remove the rear cover. (See
Fig.11.)
(4) Remove the screw H and eleven screws J attaching the
rear panel. (See Fig.12.)
(5) From the both sides of the main body, release the joints e
attaching the rear panel to the chassis base and remove
the rear panel with the fan. (See Fig.12.)
3.1.5 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, disconnect the wire
from the connector CN202
Fig.10.)
(2) From the back side of the main body, remove the screw F
and two screws G attaching the rear cover. (See Fig.11.)
(3) Remove the two screws K attaching the fan. (See Fig.12.)
(4) Take out the fan from the main body.
on the bridge board. (See
on the bridge board. (See
Bridge board
CN202
Fig.10
G
F
d
Rear panel
J
Fan
J
d
d
Fig.11
Rear cove
J
K
HK
J
1-10 (No.MB161)
J
ee
Fig.12
Page 11
3.1.6 Removing the main board
(See Figs.13 and 14)
• Prior to performing the following procedures, remove the metal
cover and rear panel.
Reference:
Remove the tuner as required.
(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.)
(2) Remove the two screws L attaching the main board. (See
Fig.14.)
(3) 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 f of the
bridge board in the hole of the main board. (See Fig.14.)
• Insert the section g of the main board in the hole of the chassis base before attaching the screws L.
, CN44, CN661, CN802,
on the main board to-
on the
Card wires
Card wires
Bridge board
CN802
CN44
Fig.13
f
Main board
CN803
CN661
CN43
Main board
L
CN217
L
f
CN501
Main board
g
Chassis base
Fig.14
(No.MB161)1-11
Page 12
3.1.7 Removing the main amplifier board/subwoofer amplifier boards
(See Figs.15 to 17)
• Prior to performing the following procedures, remove the metal
cover, 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, disconnect the con-
nectors (CN600
amplifier boards from the connection board in the direction
of the arrow. (See Fig.16.)
(3) From the side of the main amplifier/subwoofer amplifier
boards, remove the tie band bundling the wires. (See
Fig.17.)
Reference:
After reassembling, bundle the wires with the tie band.
(See Fig.17.)
(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.)
, CN700) on the main amplifier/subwoofer
, CN208) on the bridge board.
Bridge board
Wires
CN206CN208
Fig.15
Main amplifier board
Subwoofer amplifier board
Heat sink
Connection board
Tie band
P
Q
CN606 CN700
Fig.16
Wires
M
N
1-12 (No.MB161)
Subwoofer amplifier board
Fig.17
Main amplifier board
Page 13
3.1.8 Removing the connection board
r
(See Fig.18.)
• Prior to performing the following procedure, remove the metal
cover, 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 h and align the projection i of the chassis base to the hole
of the connection board.
R
Connection board
h
i
3.1.9 Removing the bridge board
(See Figs.19 and 20)
• Prior to performing the following procedures, remove the metal
cover, rear panel and main board.
(1) From the top side of the main body, disconnect the wires
from the connectors (CN206
bridge board. (See Fig.19.)
Reference:
After connecting the wire to the connector CN214
wire with the wire holder. (See Fig.19.)
(2) Disconnect the parallel wires from the connectors (CN201,
, CN213) on the bridge board. (See Fig.19.)
CN205
(3) Remove the two screws S attaching the bridge board on
the 5CD changer mechanism assembly. (See Fig.20.)
(4) Bend the claw j 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 (k,m)
in the hole of the bridge board. (See Fig.20.)
• When reassembling, pass the wires through the sections (n,
p) of the plastic chassis. (See Fig.19.)
, CN208, CN214) on the
, fix the
Chassis base
Wires
CN206
CN208
Fig.18
Bridge board
CN205
CN213CN201
Fig.19
mk
S
R
n
Bridge board
Parallel wire
CN214
p
Wire holder
S
j
Fig.20
5CD change
mechanism
assembly
(No.MB161)1-13
Page 14
3.1.10 Removing the 5CD changer mechanism assembly
(See Figs.21 and 23)
• Prior to performing the following procedures, remove the metal
cover, rear panel, main board and bridge board.
(1) From the both sides of the main body, remove the two
screws T attaching the 5CD changer mechanism assembly
to the front panel assembly. (See Figs.21 and 22.)
(2) Take out the 5CD changer mechanism assembly from the
main body.
Reference:
When attaching the 5CD changer mechanism assembly,
pass the wires through the sections (n, p) of the plastic
chassis. (See Fig.22.)
(3) From the both and top sides of the 5CD changer mecha-
nism assembly, remove the two screws U and screw V attaching the main chassis. (See Fig.23.)
(4) From the top side of the 5CD changer mechanism assem-
bly, remove the three screws W and screw X attaching the
5CD changer mechanism assembly on the plastic chassis.
Reference:
• When reassembling, align the projections (q,r,s) of the plastic chassis to the holes of the 5CD changer mechanism assembly before attaching the screws W and X. (See Fig.23.)
• Align the projections t of the plastic chassis to the holes of
the main chassis before attaching the screw V. (See Fig.23.)
Front panel assembly
5CD changer mechanism assembly
T
Fig.21
Front panel assembly
5CD changer mechanism assembly
Wires
n
5CD changer
mechanism assembly
W
Main chassis
W
s
W
Fig.22
U
U
Fig.23
T
p
Plastic chassis
t
V
t
r
q
W
Earth wire
X
1-14 (No.MB161)
Page 15
3.1.11 Removing the primary board
Y
Y
(See Figs.19,21,22,24 and 25)
• Prior to performing the following procedures, remove the metal
cover, rear panel and main board.
(1) From the top side of the main body, disconnect the wires
from the connectors (CN206
bridge board. (See Fig.19.)
Reference:
After connecting the wire to the connector CN214
wire with the wire holder. (See Fig.19.)
(2) Disconnect the parallel wires from the connectors (CN201
CN205, CN213) on the bridge board. (See Fig.19.)
(3) From the both sides of the main body, remove the two
screws T attaching the 5CD 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
5CD changer mechanism assembly.
(4) Take out the 5CD changer mechanism assembly with the
bridge board from the main body.
Reference:
When attaching the 5CD changer mechanism assembly,
pass the wires through the sections (m, n) of the 5CD
changer mechanism assembly. (See Fig.22.)
(5) From the top and left sides of the main body, remove the
four screws Y and screw Z attaching the primary board on
the chassis base. (See Figs.24 and 25.)
(6) From the forward side of the primary board, disconnect the
power cord from the connector CN200
, CN208, CN214) on the
, fix the
. (See Fig.25.)
Primary board
,
Chassis base
Fig.24
Primary board
CN200
3.1.12 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 (u, v) 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 AA attaching the FL board.
Reference:
When attaching the FL board, align the projections w of the
front panel assembly in the holes of the FL board before attaching the screws AA.
on the
Z
Front panel assembly
w
u
Parallel wire
AA
Card wire
Chassis basePower cord
Fig.25
FL board
CN902
Fig.26
AA
Parallel wire
w
AAAA
v
(No.MB161)1-15
Page 16
3.1.13 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 AB attaching the switch board.
(2) Take out the switch board and remove the soldered section
x on the switch board to remove the parallel wire.
Reference:
When attaching the switch board, align the projections y in the
holes of the switch board before attaching the screws AB.
3.1.14 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 AC attaching the standby LED board.
(2) Take out the standby LED board and remove the soldered
section z on the standby LED board to remove the parallel
wire.
Reference:
When attaching the standby LED board, align the projections
aa in the holes of the standby LED board before attaching the
screws AC.
3.1.15 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) Remove the nut attaching the encoder board. (See Fig.28.)
(3) From the inside of the front panel assembly, disconnect the
card wire from the connector CN902
Fig.26.)
(4) Remove the four screws AA, three screws AB and two
screws AC attaching the each board. (See Figs.26 and 27.)
(5) Take out the FL board with the switch and standby LED
boards.
Reference:
It is not necessary to remove the parallel wires.
(6) Remove the ten screws AD attaching the encoder board.
(See Fig.29.)
Reference:
When attaching the encoder board, align the projections ab of
the front panel assembly in the holes of the encoder board before attaching the screws AD. (See Fig.29.)
on the FL board. (See
Front panel assembly
AB
y
y
AB
y
AB
y
Parallel wires
Switch board
Front panel assembly Knobs
Standby LED board
Fig.27
Fig.28
AD
AD
ab
AD
Fig.29
aa
Encoder boardFront panel assembly
AC
aa
AC
z
Nut
ab
AD
1-16 (No.MB161)
Page 17
3.1.16 Removing the microphone board
r
(See Fig.30)
• Prior to performing the following procedure, remove the metal
cover and front panel assembly.
(1) From the inside of the front panel assembly, remove the six
screws AE and screw AE’ attaching the microphone board.
Reference:
• When attaching the microphone board, align the projections
ac of the front panel assembly in the holes of the microphone
board before attaching the screws AE and AE’.
• When attaching the screw AE', attach it with the wire holder.
3.1.17 Removing the headphone board
(See Fig.31)
• 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
screw AF attaching the headphone board.
(2) Remove the wire holder fixing the wire and take out the
headphone board.
Reference:
After attaching the headphone board, fix the wire with the wire
holder.
3.1.18 Removing the cassette mechanism assembly
(See Fig.31)
• Prior to performing the following procedure, remove the metal
cover and front panel assembly.
(1) From the inside of the front panel assembly, remove the
two screws AG and two screws AH attaching the cassette
mechanism assembly.
Reference:
When attaching the cassette mechanism assembly, align the
projections (ad,ae) in the holes of the cassette mechanism assembly.
Microphone board
AE AE AE
ac
Front panel assembly
Front panel assembly
AG
ae
AG
ac
ac
Wire holde
AE'AE
Wire
Fig.30
Cassette mechanism assembly
Wire holder
ad
AH
Wire
AF
Headphone board
AH
Fig.31
(No.MB161)1-17
Page 18
3.2 CD changer mechanism
r
3.2.1 Removing the tray assembly
(See Fig.1 ~ 5)
(1) Remove the two screws A from the top cover and release
the two joints a on both sides of the body.
(2) Remove the top cover with the two rods attached to the top
cover and lifter assembly respectively.
(3) Remove the open det lever on the left side of the body.
(4) Push part b of the slide (R) assembly on the right side of
the body to unlock the tray assembly. Draw out the trays to-
ward the front.
Attention:
The tray can be locked if all tray assemblies are attached.
(5) From top of the body, move the stopper tab c in the direc-
tion of the arrow and release. Pull out the tray assemblies
from the body.
Caution:
Remove the tray assembly from top tray 5 in order.
Attention:
When reattaching the sub tray of the tray assembly, or when
removing the CD remaining inside, refer to another section.
Top cover
Open det leve
Fig.3
c
A
a
Lifter assembly
a
Rod
Fig.1
Top cover
A
a
Tray assembly
(Tray 5)
b
Fig.4
Rod
Lifter assembly
1-18 (No.MB161)
a
Fig.2
Fig.5
Page 19
3.2.2 Removing the servo control board
(See Fig.6 ~ 9)
Caution:
Solder the short-circuit point on the pickup before disconnecting the card wire extending from the pickup. If you do not follow
this instruction, the pickup may be damaged.
(1) Disconnect the card wire from connector CN251
wire from connector CN252
vo control board on the bottom of the body. Disconnect the
wire from joint d.
(2) Solder the short round point on the flexible board of the pick
up.
(3) Remove the four screws B and turn the servo control board
as shown in the figure.
(4) Disconnect the card wire from connector CN601
servo control board.Caution: Unsolder the short-circuit
point after reassembling.
Caution:
When reassembling, twist the wires to be connected to connector CN252
3.2.3 Removing the switch board
(See Fig.9)
(1) Disconnect the wires from connector CN252
on the servo control board.
(2) Remove the screw C attaching the switch board.
(3) Release the wires from the slot e of the switch board.
Caution:
When reassembling, let the wires through the slot e of the
switch board and twist them twice.
and CN253 twice.
Servo control board
, CN253 and CN602 on the ser-
and each
on the
and CN253
B
Card wire
Short round
Flexible board
Pickup
Fig.7
Card wire
CN601
CN602
d
B
Fig.6
CN253
CN252
B
CN251
Switch board
Servo control board
Fig.8
Servo control board
CN253
e
CN252
Switch board
C
Fig.9
(No.MB161)1-19
Page 20
3.2.4 Removing the motor board
(See Fig.10 , 11)
• Prior to performing the following procedure, remove the servo
control board.
(1) Turn over the body and remove the two screws D. Move
the CD module bkt. in the direction of the arrow to release
two joints f.
(2) Unsolder the four soldered parts on the motor of the motor
board.
Caution:
If removing the motor board with the motor, you should
remove the screws attaching the motor from top of the
body(Refer to another section).
(3) Remove the two screws E attaching the motor board.
(4) Remove the spacer fixing the motor board and tray switch
board, and disconnect connector CN2
(5) Disconnect the card wire from connector CN1
board.
Caution:
When reconnecting the card wire, let the card wire through the
slot g of the motor board and attach it to the bottom of the body
using a double tape.
on the motor board.
on the motor
f
f
CD Module
braket
DD
Fig.10
Spacer
Soldering point
CN2
CN1
g
E
E
Motor
Double
face tape
Card wire
Fig.11
1-20 (No.MB161)
Page 21
3.2.5 Removing the CD tramecha assembly
(See Fig.12)
• Prior to performing the following procedure, remove the servo
control board.
(1) Turn over the body and remove the three screws F attach-
ing the tramecha.
F
F
F
CD Tramecha assembly
Fig.12
(No.MB161)1-21
Page 22
3.2.6 Removing the pickup
(See Fig.13 , 14)
• Prior to performing the following procedure, remove the servo
control board and CD tramecha assembly.
(1) From top of the CD tramecha assembly, turn the cam gear
in the direction of the arrow to move the pickup assembly
outward.
(2) Push down the stopper h in the direction of the arrow and
pull out the shaft.
(3) Release the joint i of the pickup assembly and mecha
base.
(4) Remove the screw G attaching the CD rack. Release the
four tabs j at the bottom of the CD rack.
Mecha base
h
Stopper
i
Pickup assembly
Shaft
Cam gear
ShaftShaft
Stopper
Fig.13
CD lack
G
Pickup
j
j
1-22 (No.MB161)
j
Fig.14
Page 23
3.2.7 Removing the side (L)/ tray switch board
(See Fig.15 ~ 17)
• Prior to performing the following procedure, remove the tray
assembly.
(1) Remove the two screws H attaching the side (L) on top of
the body.
(2) From the side of the body, remove the spacer fixing the tray
switch board and motor board. Disconnect connector CN3
on the tray switch board and detach the side (L) upward.
(3) Remove the screw J attaching the tray switch board.
(4) Push the joint tab k of the side (L) in the direction of the ar-
row and remove the tray switch board outward, then re-
lease joint l.
H
Side (L)
H
Fig.15
H
H
CN3
Spacer
Side (L)
Fig.16
k
Side (L)
Tray switch board
Fig.17
l
J
(No.MB161)1-23
Page 24
3.2.8 Removing the side (R) assembly
(See Fig.18 ~ 22)
• Prior to performing the following procedure, remove the tray
assembly.
(1) Push and release the two tabs m of the gear cover through
the two notches inside the side (R) assembly. Remove the
gear cover outward.
(2) Remove the spring attached to part n of the hook on the
right side of the body.
(3) From top of the body, turn the 1 gear clockwise to move the
elevator cam rearward.Move the two slots o and joint p of
the elevator cam as shown in Fig.21 and remove the elevator cam outward.
(4) Remove the three screws K and detach the side (R) up-
ward.
Caution:
When reattaching the side (R) assembly, make sure to fit the
shaft (part q) into the slot of the select lever.
Side (R) assembly
m
Fig.20
K
Side (R)
assembly
K
Side (R) assembly
K
Fig.18
q
Spring
n
Elevator cam
o
o
p
Fig.21
K
Side (R) assembly
1 gear
Gear cover
1-24 (No.MB161)
Sprihg
K
n
Fig.22
Elevator com
Fig.19
Page 25
3.2.9 Removing the lifter assembly
(See Fig.23 ~ 27)
• Prior to performing the following procedure, remove the tray
assembly and side (L)/ side (R) assembly.
(1) From top of the body, turn the 1 gear clockwise to move the
lifter assembly upward as shown in Fig.24.
(2) From top of the body, turn the 2 gear clockwise to move the
hook toward the front until it stops.
(3) Move the hook stopper in the direction of the arrow while
pushing the tab r of the hook stopper to unlock it. Release
four joints s to detach from the rack holder.
Release the rod from part t.
(4) Turn the 1 gear clockwise again to move the lifter assembly
upward.
(5) Remove the lifter assembly from the body upward at posi-
tion u where the four pins on the right and left sides of the
lifter assembly fit to the notches of the v.
Move the lifter assembly toward the front and release from
the hook.
2 gear
1 gear
Hook
t
s
Rod
s
s
r
s
Hook stopper
Fig.25
Lifter assembly
1 gear
u u
Hook stopper
Hook
2 gear
Fig.23
1 gear
Lifter
assembly
Lifter assembly
v
Lifter assembly
Fig.26
u
u
Hook stopper
Hook
Fig.24
v
Fig.27
(No.MB161)1-25
Page 26
3.2.10 Removing the rack holder assembly/ sensor assembly
(See Fig.28 ~ 33)
• Prior to performing the following procedure, remove the tray
assembly, side (L)/ side (R) assembly, lifter assembly.
Attention:
If the slide gear of the body places at joint w of the rack holder
assembly, turn the 1 gear counterclockwise to move the slide
gear toward the front. Remove the rack holder assembly.
(1) Remove the three screws J attaching the rack holder as-
sembly. Release joint w from the notch.
Caution:
When reattaching the rack holder assembly, do not nip
the wire x extending from the sensor assembly.
(2) Remove the two screws M attaching the sensor assembly.
(3) Move the sensor assembly in the direction of the arrow to
release from the slot at joint y.
(4) Remove the spring attached to the bottom of the sensor as-
sembly from the boss z on the sensor slider.
(5) Remove the screw N and O attaching the sensor board and
SV resister respectively.If necessary, unsolder the sensor
board.
Caution:
When reattaching the SV resister, attach the sensor slider to
the sensor bracket and fit the lever on the bottom of the SV resister into slot a’ of the sensor slider.
Caution:
When reattaching the rack holder assembly, turn the 1 gear
clockwise to move the slide gear and slide lever inside the
body rearward.
• Let the wire extending from the sensor assembly through notch
x to the bottom of the body.
• Fit pin c’of the slide lever into hole b’ of the sensor slider on
the bottom of the sensor assembly while attaching the spring
to the boss z of the sensor slider.
• Engage joint y of the sensor assembly to the notch of the body.
Rack holder
assembly
Rack holder
assembly
L
w
L
1 gear
x
L
Fig.28
Rack holder
assembly
1-26 (No.MB161)
w
w
Fig.29
Page 27
x
O
Soldering
SV resister
N
Sensor board
point
M
z
M
Sensor slider
y
a'
Fig.30
b'
Sensor assembly
Spring
Spring
a'
Slide gear
Sensor braket
Sensor slider
Fig.32
M
Sensor assembly
M
y
b'
z
z
Fig.31
c'
Spring
Fig.33
Slide lever
(No.MB161)1-27
Page 28
3.2.11 Removing the motor
r
(See Fig.34 ,35)
• Prior to performing the following procedure, remove the servo
control board and top cover.
Attention:
You need not to remove the tray assembly, and in such case,
move it.
(1) Remove the two belts on top of the body.
(2) Remove the four screws N attaching the motor.
(3) Remove the motor board from the bottom of the body.
(Refer to the section “Removing the motor board”.)
Attention:
When removing the motor board with the motor, you need not
to unsolder four soldered parts.
Caution:
When reattaching the motor, turn the side where the label
should be put to the front side.
Motor
Moto
NN
Belt
Fig.34
Label
Belt
Fig.35
1-28 (No.MB161)
Page 29
3.2.12 Taking out the CD in play mode
r
(See Fig.36 ~ 39)
Attention:
Refer to “Removing the tray assembly”.
(1) Remove the top cover upward.
(2) Unlock the tray assembly and draw out the tray assembly
toward the front.
(3) From top of the body, turn the 1 gear clockwise to move the
lifter assembly upward.
(4) From top of the body, turn the 2 gear clockwise to move the
sub tray remaining inside the lifter assembly toward the
front, then pull out.
(5) Take out the CD on the sub tray.
(6) After clearing away the CD, insert the sub tray into the main
tray.
Caution:
When reattaching the sub tray, move the tray stopper on
the bottom of the main tray in the direction of the arrow
to lock the sub tray certainly.
(7) Push the tray assembly toward the body and reattach.
Tray assembly
Tray assembly
Tray stopper
Sub tray
Fig.37
Main tray
2 gear
1 gear
Sub tray
Sub tray
Fig.38
Fig.36
Tray stoppe
Fig.39
(No.MB161)1-29
Page 30
3.3 Cassette mechanism assembly
3.3.1 Removing the Play/Record & Clear head
(See Fig.1~3)
(1) While moving the trigger arm on the right side of the head
mount in the direction of the arrow, turn the flywheel R
counterclockwise until the head mount comes ahead and
clicks.
(2) The head turns counterclockwise as you turn the flywheel
R counterclockwise (See Fig.2 and 3).
(3) Disconnect the flexible wire from connector CN31
head amplifier & mechanism control board.
(4) Remove the spring from the back of the head.
(5) Loosen the azimuth screw for reversing attaching the head.
(6) Remove the head on the front side of the head mount.
on the
Cassette mechanism assembly
Fig.1
Head
Fly wheelR
Trigger armHead mount
Flexible wire
Fly wheel R
Fig.2
Azimuth screw
Head
for reversing
Spring
CN31
Head amplifer & mecha control board
Fig.3
1-30 (No.MB161)
Page 31
3.3.2 Removing the head amplifier & mechanism control board
(See Fig.4)
(1) Turn over the cassette mechanism assembly and remove
the three screws A attaching the head amplifier & mechanism control board.
(2) Disconnect the flexible wire from connector CN31
head amplifier & mechanism control board.
(3) Disconnect connector CN32
anism control board from connector CN1
board.REFERENCE: If necessary, unsolder the 4-pin wire
soldered to the main motor.
3.3.3 Removing the main motor
(See Fig.4~7)
(1) Remove the two screws B .
(2) Half raise the motor and remove the capstan belt from the
motor pulley.
ATTENTION:
Be careful to keep the capstan belt from grease. When reassembling, refer to Fig.6 and 7 for attaching the capstan belt.
Head amplifier & mecha control board
of the head amplifier & mech-
on the reel pulse
on the
Main motor assembly
Capstan belt
Fig.5
Main motor assembly
CN31
Flexible wire
A
AA
Fig.4
CN32
4pin wire
B
Main motor assembly
Motor pulley
Capstan belt
Fig.6
Main motor assembly
Fly wheel
Capstan belt
Motor pulley
Fig.7
(No.MB161)1-31
Page 32
3.3.4 Removing the flywheel
(See Fig.8, 9)
• Prior to performing the following procedure, remove the head
amplifier & mechanism control board and the main motor assembly.
(1) From the front side of the cassette mechanism, remove the
slit washers attaching the capstan shaft L and R. Pull out
the flywheels backward.
Fly wheel R Fly wheel L
Fig.8
Fly wheel R
Capstan shaft R Capstan shaft L
Slit washer
Fig.9
3.3.5 Removing the reel pulse board and solenoid
(See Fig.10)
• Prior to performing the following procedure, remove the head amplifier & mechanism control board.
(1) Remove the screw C.
(2) Release the tab a, b, c, d and e retaining the reel pulse board.
(3) Release the tab f and g attaching the solenoid on the reel pulse board.
(4) The reel pulse board and the solenoid come off.
Fly wheel L
a
Solenoid
g
f
bc
d
Reel pulse board
C
e
Fig.10
1-32 (No.MB161)
Page 33
3.3.6 Reattaching the Play/ Record & Clear head
r
r
(See Fig.11~13)
(1) Reattaching the head mount assembly.
a) Change front of the direction cover of the head
mount assembly to the left (Turn the head forward).
b) Fit the bosses O', P', Q', U' and V' on the head mount
assembly to the holes P and V, the slots O, U and Q
of the mechanism sub assembly (See Fig.11 to 13).
CAUTION:
To remove the head mount assembly, turn the direction
cover to the left to disengage the gear. If the gear can not
be disengaged easily, push up the boss Q' slightly and
raise the rear side of the head mounts slightly to return
the direction lever to the reversing side.
(2) Tighten the azimuth screw for reversing.
(3) Reattach the spring from the back of the Play/ Record &
Clear head.
(4) Connect the flexible wire to connector CN31
amplifier & mechanism control board.
on the head
U' Q'
Head mount assembly
Head mount assembly
O'
Fig.11
P'
P'
V'
V'
Direction cove
Spring
Flexible wire
V
O
P
Q
Head
Direction cove
U
Fig.12
Azimuth screw for reversing
Head mount
CN31
Fig.13
Head amplifier &
mechanism control board
(No.MB161)1-33
Page 34
3.4 Speaker section
3.4.1 Removing the side panel assembly
(See Fig.1)
(1) From the side of the speaker main body, remove the seven
screws A and screw B attaching the side panel assembly .
A
A
B
3.4.2 Removing the subwoofer
(See Fig.2)
• Prior to performing the following procedures, remove the side
panel assembly.
(1) Remove the four screws C attaching the subwoofer.
(2) From the back side of the subwoofer, disconnect the red
and black wires from the terminal.
A
Side panel assembly
Fig.1
Subwoofer
CC
Terminal
Red wire
Fig.2
Black wire
1-34 (No.MB161)
Page 35
3.4.3 Removing the front panel assembly
(See Figs.3 and 4)
• Prior to performing the following procedures, remove the side
panel assembly.
(1) Remove the four screws D attaching the front panel as-
sembly. (See Fig.3.)
(2) Release the two joints a. (See Fig.3.)
Caution:
When removing the front panel assembly from the
speaker main body, do not break or damage them that
are glued at the joints a. (See Fig.3.)
(3) From the inside of the front panel assembly, disconnect the
yellow and black wires from the two terminals on the tweeter. (See Fig.3.)
3.4.4 Removing the tweeter
(See Fig.4)
• Prior to performing the following procedure, remove the side
panel and front panel assemblies.
(1) From the inside of the front panel assembly, remove the
two screws E attaching the tweeter.
Front panel assembly
D
a
D
Fig.3
Front panel assembly
E
a
Tweeter
Black wire
E
Yellow wire
Terminals
Fig.4
(No.MB161)1-35
Page 36
3.4.5 Removing the top woofer
(See Fig.5)
• Prior to performing the following procedures, remove the side
panel and front panel assemblies.
(1) Remove the four screws F attaching the top woofer.
(2) From the back side of the top woofer, disconnect the red
and black wires from the terminal.
Top woofer
FF
Terminal
3.4.6 Removing the bottom woofer
(See Fig.6)
• Prior to performing the following procedures, remove the side
panel and front panel assemblies.
(1) Remove the four screws G attaching the bottom woofer.
(2) From the back side of the bottom woofer, disconnect the
black, red and blue wires from the terminal respectively.
Black wire
Black wire
Red wire
Fig.5
Bottom woofer
GG
Terminal
Black wire
Blue wire
Red wire
Fig.6
1-36 (No.MB161)
Page 37
SECTION 4
ADJUSTMENT
4.1 Measurement Instruments Required for Adjustment
(1) Low frequency oscillator
This oscillator should have a capacity to output 0dBs to
600Ω at an oscillation frequency of 50Hz-20kHz.
(2) Attenuator impedance : 600Ω
(3) Electronic voltmeter
(4) Distortion meter
(5) Frequency counter
(6) Wow & flutter meter
(7) Test tape
VT703L : Head azimuth
VT712 : Tape speed and running unevenness (3kHz)
VT724 : Reference level (1kHz)
(8) Blank tape
TYPE l : AC-225
TYPE ll : AC-514
(9) Torque gauge : For play and back tension
FWD(TW2111A), REV(TW2121a) and FF/REW(TW2231A)
(10) Test disc: CTS-1000
4.2 Measurement conditons
Power supply voltage AC 120V ~, 60Hz
Reference output Speaker : 0.775V/4Ω
Headphone : 0.077V/32Ω
Reference frequency and input level 1kHz, AUX : -8dBs
Measurement output terminal at Speaker J3002
Load resistance 4Ω
4.2.1 Radio Input signal
AM frequency 400Hz
AM modulation 30%
FM frequency 400Hz
FM frequency deviation 22.5kHz
4.2.2 Tuner section
Voltage applied to tuner +B : DC5.7V
VT : DC 12V
Reference measurement output 26.1mV(0.28V)/3Ω
Input positions AM : Standard loop antenna
FM : TP1 (hot) and TP2 (GND)
4.2.3 Standard measurement position of volume
Function switch to Tape
Beat cut switch to Cut
Super Bass/Active hyper Bass to OFF
Bass Treble to Center
Adjustment of main volume to reference output VOL : 0.775V
Precautions for measurement
(1) Apply 30pF and 33kΩ to the IF sweeper output side and
0.082µ F and 100kΩ in series to the sweeper input side.
(2) The IF sweeper output level should be made as low as
possible within the adjustable range.
(3) Since the IF sweeper is a fixed device, there is no need
to adjust this sweeper.
(4) Since a ceramic oscillator is used, there is no need to
perform any MIX adjustment.
(5) Since a fixed coil is used, there is no need to adjust the
FM tracking.
(6) The input and output earth systems are separated. In
case of simultaneously measuring the voltage in both of
the input and output systems with an electronic voltmeter
for two channels, therefore, the earth should be connected particularly carefully.
(7) In the case of BTL connection amp., the minus terminal
of speaker is not for earthing. Therefore, be sure not to
connect any other earth terminal to this terminal. This
system is of an BTL system.
(8) For connecting a dummy resistor when measuring the
output, use the wire with a greater code size.
(9) Whenever any mixed tape is used, use the band pass fil-
ter (DV-12).
(No.MB161)1-37
Page 38
4.3 Cassette mechanism adjustment
Head azinuth
adjustment screw
(Forward side)
Mecha control board
Motor speed
VR37
Head azinuth
adjustment screw
(Reverse side)
Head azinuth
adjustment screw
(Forward side)
R/P head, Erase head
Head azinuth
adjustment screw
(Reverse side)
CN31
BIAS adjust
VR31
C308
R327
VR31
R313
Q302
R315
C316
C319
R314
C121
C221
L301
SW1
C314
R104
Q305
C313
PP300
D340
C310
R121
R221
R310
C107
L303
R102
R303
R335
R353
R108
C113
R304
Q343
R339
R302
C301
C103
C207
R110
Q342
C304
R208
C105
C205
R301
SW2
C106
R306
R101
C104
D1
R106
Q344
CN34
R105
C306
C102
R344
R205
Q345
R345
C307
R336
C340
R346
C206
R107
R206
W1
Q346
VR37
R210
R305
C300
C341
C110
R109
R372
Q372
C120
C371
P1
CN33
IC32
R116
C109
CN31
Q371
C101
R371
C374
C220
Q375
R376
R216
C376
C202
C201
R201
C204
W1
D375
R204
C213
C342
Q376
R375
R207
C209
IC1
FW100
CN32
R338
R337
R202
CN1
C203
C210
R340
C331
R342
R347
Q347
SW6
R343
SW5
R341
IC33
1-38 (No.MB161)
Page 39
4.3.1 Mechanism section
Item Condition Measurement method Ref. value
Head azimuth Test tape
:VT703L (8kHz)
Output terminal
:Speaker out
Tape speed Test tap
:VT712 (3kHz)
Output terminal
:Speaker out or Headphone out
Item Condition Measurement method Ref. value
Tape speed
diviation at FWD/
REV
Wow & Flutter Test tape
Test tape
: VT712 (3kHz)
Output terminal
:Speaker out or Headphone out
: VT712 (3kHz)
Output terminal
:Speaker out or Headphone out
(1) Playback the test tape VT703L (8kHz).
(2) Adjust to maximum output level by azi-
muth adjustment screw for forward side
and reverse side.
(3) This adjustment is adjust by adjustment
screw of forward side and adjustment
screw of reverse side.
Playback the test tape VT712 (3kHz) at end of
forward side,adjust to 2,940~3,90Hz indication
of frequency counter by VR37.
Playback the test tape VT712 (3kHz) at end of
forward and reverse, tape speed deviation
should be less than 6.0Hz.
Playback the test tape VT712 (3kHz) at start of
forward and reverse, Wow & Flutter are should
be less than 0.25%(WRMS).
Adjustment
position
Maximum output Only adjust
at changed
head
2,940 ~ 3,090Hz VR37
Adjustment
position
Leass than
6.0Hz
Less than 0.25%
(WRMS)
VR31
(No.MB161)1-39
Page 40
4.3.2 Electrical adjustment
Item Condition Measurement method Ref. value
Recording BIAS
adjustment
R/P playback
frequency
response
4.3.3 Electrical response confirmation
Item Condition Measurement method Ref. value
Recording bias
current
Erase current (reference value)
• Forward or Reverse
• Test tape
: AC-514 TYPE ll
: AC-225 TYPE l
• Output termina
Recording head
• Reference frequency
: 1kHz / 10kHz
(Reference: -20dB)
• Test tape
: AC-514 TYPE ll
• Input terminal
: OSC IN
• Forward or Reverse
• Test tape
: TYPE ll (AC-514)
• Measurement terminal
: BIAS test point on printed
circuit board
• Forward or Reverse
• Rec condition
Test tape
: AC-514 TYPE ll
: AC-225 TYPE l
• Measurement terminal
Both side of Erase head
(1) Set the test tape(AC-514 TYPE ll and
AC-225 TYPE l), then make REC/
PAUSE condition.
(2) Connect 100Ω to recording head by se-
ries, then connect to VTVM for measurement the current.
(3) After setting, start the recording by re-
lease the PAUSE, in this time bias current adjust to next fig. by VR31
and VR32
4.0 µA (TYPE ll) and 4.20 µA (TYPE l).
(1) Set the test tape (AC-514 TYPE ), then
make REC/PAUSE condition.
(2) Release the PAUSE, then start recording
the 1kHz and 10kHz of reference frequency from oscillator.
(3) Playback the recorded position, 1kHz
and 10kHz output deviation should -1dB
2dB to readjust by VR31
VR32 for Rch.
(1) Change BIAS1 and 2, confirm the fre-
quency should be change.
(2) Set the test tape (AC-514 TYPE ll), then
make REC/PAUSE condition.
(3) Confirm the frequency should 100Hz ±
6kHz at BIAS test point on printed circuit
board.
(1) Set the test tape (AC-514 TYPE ll and
AC-225 TYPE l), then make REC/
PAUSE condition.
(2) Release the PAUSE to REC condition,
connect 1W to ERASE head by series,
then confirm the erase current at both
side of erase head.
for Rch.
for Lch
for Lch and
AC-225
: 4.20µA
AC-514
: 4.0µA
Output deviation
1kHz/10kHz
: -1dB ± 2dB
100 kHz ± 6 kHz
TYPE ll
: 120 mA
TYPE l
: 75 mA
Adjustment
position
VR31
VR31
Adjustment
position
1-40 (No.MB161)
Page 41
TROUBLESHOOTING
5.1 Flow of functional operation untill TOC read
Power ON
Play Key
SECTION 5
Slider turns REST
SW ON.
Automatic tuning
of TE offset
Check Point
Confirm that the voltage at the pin5
of CN801 is "H"\"L"\"H".
Tracking error waveform at TOC reading
Approx.3sec
Tracking
servo
off states
Automatic measurement
of TE amplitude and
automatic tuning of
TE balance
VREF
pin 25 of
IC601(TE)
Approx
1.8V
Disc states
to rotate
Tracking
servo
on states
Disc to be
braked to stop
TOC reading
finishes
500mv/div
2ms/div
Fig.1
Laser ON
Detection of disc
Automatic tuning of
Focus offset
Automatic measurement of
Focus S-curve amplitude
Disc is rotated
Focus servo ON
(Tracking servo ON)
Automatic measurement of
Tracking error amplitude
Automatic tuning of
Tracking error balance
Check that the voltage at the
pin40 of IC651 is + 5V?
Confirm that the Focus error
S-cuve signal at the pin28 of
IC651 is approx.2Vp-p
Confirm that the signal from
pin24 IC651 is 0V as a
accelerated pulse during
approx.400ms.
Confirm the waveform of
the Tracking error signal.
at the pin 25 of IC601 (R604)
(See fig-1)
Automatic tuning of
Focus error balance
Automatic tuning of
Focus error gain
Automatic tuning of
Tracking error gain
TOC reading
Play a disc
Confirm the eye-pattern
at the lead of TP1
(No.MB161)1-41
Page 42
5.2 Maintenance of laser pickup (CD)
(1) Cleaning the pick up lens
Before you replace the pick up, please try to clean the lens
with a alcohol soaked cotton swab.
(2) Life of the laser diode
When the life of the laser diode has expired, the following
symptoms will appear.
• The level of RF output (EFM output : ampli tude of eye
pattern) will below.
5.3 Replacement of laser pickup (CD)
Turn off the power switch and, disconnect the
power cord from the AC outlet.
Replace the pickup with a normal one. (Refer to
"Removing the CD pickup" on the previous page)
Is RF output
1.25 0.22Vp-p?
NO
Replace it.
YES
O.K
(3) Semi-fixed resistor on the APC PC board
The semi-fixed resistor on the APC printed circuit board
which is attached to the pickup is used to adjust the laser
power. Since this adjustment should be performed to
match the characteristics of the whole optical block, do not
touch the semi-fixed resistor.
If the laser power is lower than the specified value, the laser diode is almost worn out, and the laser pickup should
be replaced.
If the semi-fixed resistor is adjusted while the pickup is
functioning normally, the laser pickup may be damaged
due to excessive current.
Plug the power cord in, and turn the power on.
At this time, check that the laser emits for
about 3 seconds and the objective lens moves
up and down.
Note: Do not observe the laser beam directly.
Play a disc.
Check the eye-pattern at TP1.
Finish.
1-42 (No.MB161)
Page 43
5.4 Service mode
5.4.1 Confirming contents
(1) System micon reset
(2) System micon cold start
(3) FL display check
(4) Micon version check
5.4.2 Confirming methods
1. System micon reset
When CD mechanism stuck, this may solve the problem without removing/inserting power cord.
Press the
and buttons on the main unit
simultaneously.
STANDBY/ON, CANCEL
System micon is initialized.
2. System micon cold start
This function clears all user setting, and return to initial setting.
Daily timer, REC timer
Tuner preset
SEA preset
Last condition (Source, Volume)
While pressing both the CANCEL and
buttons on the main unit, insert the
power cord in an outlet
Operating method using a remote controller
Press the VOLUME UP, STOP and STANDBY/ON buttons
twice on the remote controller at standby.
This unit returns to initial setting.
3. FL display check
This enables all FL segment light up.
Press the VOLUME DOWN, STOP and
STANDBY/ON buttons on the remote
controller at standby.
All of the FL displays light up.
(No.MB161)1-43
Page 44
4. Micon version check
You can confirm Micon version and destination.
Insert the power cord in an outlet, and
press the STANDBY/ON button on the
main unit or remote controller.
Press the FADE MUTING, STOP and
STANDBY/ON buttons on the remote
controller.
System micon version is indicated on
the FL display.
Press the FADE MUTING, STOP and
STANDBY/ON buttons on the remote
controller.
CD mechanism micon version is indicated
on the FL display.
Press the FADE MUTING, STOP and
STANDBY/ON buttons on the remote
controller.
Model number is indicated
on the FL display.
Press the FADE MUTING, STOP and
STANDBY/ON buttons on the remote
controller.
Destination is indicated on the FL display.
1-44 (No.MB161)
Page 45
5.4.3 Indicating check for FL display
No. Function FL display Note
1 SOURCE
C
D
1
2.
1
2:
3
2:
N
8.
4
3
4
0
2
0
0
: PRESET NUMBER
: PRESET NUMBER
CD
MP3
TAPE
AUX
AM
FM
1
2.
1
2
2.
1
T
AXP
E
A
U
A
M
F
M
I
1
6
1
0
2 TUNER
PRESET MEMOERY
PRESET MEMOERY
PRESET MEMOERY
3 TAPE
PLAY
REVERSE
FF/REW
MUSIC SCAN
REC
CD REC
CD REC STOP
4 VOLME
UP/DOWN
MAX
MIN
RHYTHM AX
ON
OFF
SUBWOOFER
LEVEL CHANGE
LEVEL CHANGE
LEVEL CHANGE
LEVEL CHANGE
AT LEVEL 0
AT LEVEL 2
SOUND MODE
DANCE
HALL
STADIUM
ROCK
POP
CLASSIC
USER1
USER2
USER3
OFF
TTU
N
E
R
F
M
U
N
E
R
A
M
S
E
T
P
1R2
S
T
O
E
D
T
A
P
E
T
A
P
E
R
E
V
E
R
E
T
A
P
E
T
A
P
E
T
A
P
E
C
D
R
ESC
V
O
L
U
M
E
3
0
V
O
L
U
M
E
M
A
V
O
L
U
M
E
M
R
H
Y
T
H
M
A
X
O
N
O
F
F
S
U
B
W
O
O
F
E
R
S.
W
O
O
F
E
R
S.
W
O
O
F
E
R
S.
W
O
O
F
E
R
M
I
N
L
E
V
E
M
A
X
L
E
V
E
D
A
N
C
E
H
A
L
L
S
T
A
D
I
U
M
R
O
C
K
P
O
P
C
L
A
S
S
I
C
U
S
E
R
1
U
S
E
R
2
U
S
E
R
3
O
F
F
TEMPORARY
TEMPORARY
BLINKING
BLINKING
TEMPORARY
TEMPORARY
"CD REC FINISHED" SCROLL
TEMPORARY
X
TEMPORARY
I
N
TEMPORARY
TEMPORARY
TEMPORARY
TEMPORARY
0
TEMPORARY
1
TEMPORARY
2
TEMPORARY
L
TEMPORARY
L
TEMPORARY
TEMPORARY
TEMPORARY
TEMPORARY
TEMPORARY
TEMPORARY
TEMPORARY
TEMPORARY
TEMPORARY
TEMPORARY
TEMPORARY
(No.MB161)1-45
Page 46
No. FL display
Function Note
4 TONE SETTING
S
E
A
TONE MEMORY
TONE MEMORY
TONE MEMORY
TONE MEMORY
TONE MEMORY
B
A
T
U
M
C
S
S
R
E
S
E
R
E
M
O
KARAOKE
K
A
R
A
KARAOKE ON
KARAOKE OFF
O
O
F
F
MIC MIX
M
I
C
MIC MIX
MIC OFF
M
I
M
C
O
ECHO
E
C
H
ECHO
ECHO OFF
E
C
O
H
O
KEY CONTROL
K
E
Y
C
KEYCON
O
5 SLEEP
S
L
E
E
SLEEP 10 120
P
CLOCK
ADJUST
SET
SET
M
A
M
C
1
2:
1
2.
L
O
C
K
A
DAILY TIMER
D
A
I
L
Y
SELECT
SET
SET
SET
SET
SET
SET
SET
SET
O
N
O
N
O
F
F
O
F
F
1
A
T
U
T
U
1
1
V
O
L
T
A
M
A
M
S
E
T
A
M
A
M
S
E
T
C
D
T
A
P
U
X
N
E
R
N
E
R
S
E
T
C
D
S
E
T
C
D
S
E
T
U
M
E
S
E
T
O
N
0
0
1
R
Y
K
E
RANGE: -3 0 +3
RANGE: -3 0 +3
NUMBER BLINKING
TEMPORARY
TEMPORARY
TEMPORARY
I
X
F
F
TEMPORARY
RANGE: 1 3
O
FTF
N
RANGE: -6 0 +6
RANGE: 10/20/30/60/120
0
0
0
0
O
K
I
M
E
1
2:
0
1
2:
0
1
2:
0
1
2:
0
1
E
I
N
F
M
A
M
1
1
HOUR BLINKING
MINUTE BLINKING
R
0
HOUR BLINKING
0
MINUTE BLINKING
0
HOUR BLINKING
0
MINUTE BLINKING
BLINKING (ALL)
BLINKING
BLINKING
BLINKING
BLINKING
BLINKING DISC
BLINKING TRACK
--/5/10/15
O
K
1-46 (No.MB161)
Page 47
No. FL display
Function Note
5 REC TIMER
R
E
C
SELECT
SET
SET
SET
SET
SET
SET
O
N
O
N
O
F
F
O
F
F
T
U
T
U
F
M
3
T
A
M
A
M
S
E
T
A
M
A
M
S
E
T
N
E
R
N
E
R
S
E
T
0
1
S
E
T
6 TEST (ROM) by Remocon
S
Y
S
"B332"
M
V
CUOLN
O
D
E
R
E
7 CD STATUS
O
P
OPEN
CLOSE
NO DISC
DISC CHANGE
TOC READING
ROM CORRECTION
N
O
D
R
U
E
C
L
O
D
I
I
S
C
E
A
D
P
G
R
(SYSCON)
S
Y
S
C
O
ROM CR. OK
ROM CR. NG
S
Y
S
N
C
O
N
I
M
E
R
1
2:
0
0
HOUR BLINKING
1
2:
0
0
MINUTE BLINKING
1
2:
0
0
HOUR BLINKING
1
2:
0
0
MINUTE BLINKING
F
M
A
M
0
8.
0
O
K
BLINKING
BLINKING
0
BLINKING
ROM correction +3 CHARACTORS
4 CHARACTORS (including ROM CORR)
J / E / A / US / UW / UX
N
S
E
S
C
2
I
N
G
A
D
E
O
E
R
SOURCE CD and CURRENT ONLY
SOURCE CD and CURRENT ONLY
1
SOURCE CD and CURRENT ONLY
SOURCE CD and CURRENT ONLY
SOURCE CD and CURRENT ONLY
SOURCE CD and CURRENT ONLY
K
SOURCE CD and CURRENT ONLY
R
SOURCE CD and CURRENT ONLY
8CD
STOP
PLAY
PAUSE
SEARCH
+10KEY INPUT
9 MP3
STOP
STOP
STOP
STOP
PLAY
PLAY
PLAY
PLAY
PLAY
PAUSE
SEARCH
C
C
C
C
C
GG0
D
D
D
D
D
1.
1.
112.
1.
1.
1.
.
83:
3:
3:
:
3:
4
5
DISPLAY TOTAL TIME
4
5
4
5
TIME BLINKING
4
5
GROUP FILE NAME SCROLL
1
T
00001
G BLINKING
TRACK FILE NAME SCROLL
0
1
T
1
T BLINKING
TRACK FILE NAME SCROLL
TRACK "SONG TITLE" SCROLL
TRACK "PERFORMER" SCROLL
TRACK "ALBUM TITLE" SCROLL
2
3.
2
3.
3:3:445
5
TIME BLINKING
TRACK FILE NAME SCROLL
(No.MB161)1-47
Page 48
No. FL display
Function Note
10 PROGRAM
C
D
P
R
PROGRAM MODE
DISC INPUT (Disc# key)
TRACK INPUT
STOP
D
1
D
1
D
1
O
1
1
2
3
1
2
3
PLAY
FULL MEMORY
C
D
F
U
11 RANDOM
RANDOM MODE
SEARCH
CCD
D
RRAANNDDOOM
PLAY
12 REPEAT
REPEAT 1 track
REPEAT 1 disc
REPEAT ALL
D
C
D
C
D
1.
1.
1.
C
13 PROGRESSIVE
INTERLACE
IPNRTOEGRRLEASCSE
PROGRESSIVE
14 DEMO
D
E
M
O
DEMO START
W
E
C
D
I
S
D
I
S
M
P
D
I
S
D
I
S
C
D
I
S
D
I
S
C
D
I
S
D
I
S
C
D
I
S
D
I
S
T
U
T
U
A
A
D
S
T
S
L
C
O
T
O
J
V
D
P
C
1
C
3
P
C
2
C
D
P
C
3
C
D
P
C
4
C
D
P
C
5
C
N
E
R
N
E
R
T
A
P
U
X
U
X
A
N
C
H
A
L
A
D
I
G
P
P
P
LRL
T
M
C
L
P
L
P
L
P
L
P
L
P
E
I
E
L
U
3:
3:
3:
A
E
A
L
A
L
A
L
A
L
A
L
F
A
N
M
AM
1
1
M
4
5
4
5
4
5
IV
R
T
Y
A
Y
Y
A
Y
Y
A
Y
Y
A
Y
Y
A
Y
M
M
DISC#, TRACK# Blink
10key or SEARCH Jog input
DEPEND ON DISC TYPE
TEMPORARY
: MOVING
DEPEND ON DISC TYPE
CD/MP3 case
ANY case
ANY case
TEMPORARY
TEMPORARY
1-48 (No.MB161)
Page 49
No. FL display
Function Note
14
DEMO OFF
BEEP
BEEP ON
BEEP OFF
TRAY LOCK
LOCK
UNLOCK
R
O
C
K
P
O
P
C
L
A
S
S
I
C
U
S
E
R
1
U
S
E
R
2
U
S
E
R
3
S.
W
O
O
F
E
R
1
S.
W
O
O
F
E
R
2
M
A
X
L
E
V
E
L
S.
W
O
O
F
E
R
1
S.
W
O
O
F
E
R
0
M
I
N
L
E
V
E
L
P
H
Y
T
H
M
A
X
O
N
D
E
M
O
O
F
F
B
E
E
P
O
N
B
E
E
P
O
F
F
L
O
C
K
E
D
U
N
L
O
C
K
E
D
AM STEP CHANGE
9 kHz
10 kHz
A
M
A
M
9
K
1
0
K
(No.MB161)1-49
Page 50
VICTOR COMPANY OF JAPAN, LIMITED
AV & MULTIMEDIA COMPANY AUDIO/VIDEO SYSTEMS CATEGORY 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan
(No.MB161)
Printed in Japan
WPC
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