JVC UXP-550 Service manual
SERVICE MANUAL
MICRO COMPONENT SYSTEM
MB28620047
UX-P550
Area suffix
US ------------------------ Singapore
UB ---------------------- Hong Kong
UW ----------- Brazil,Mexico,Peru
UX -------------------- Saudi Arabia
UJ ---------------------- U.S.Military
UN ----------------------------- Asean
CA-UXP550SP-UXP550 SP-UXP550
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-38
COPYRIGHT © 2004 Victor Company of Japan, Limited
No.MB286
2004/7
SPECIFICATION
Amplifier section Output Power HIGH:40 W (20 W + 20 W) at 4 Ω (10% THD)
LOW:40 W (20 W + 20 W) at 4 Ω (10% THD)
Audio Input AUX:400 mV/50 k Ω
Digital output DVD OPTICAL DIGITAL OUT:-21 dBm to -15 dBm (660 nm ±30 nm)
Video output Color system:NTSC/PAL selectable
VIDEO (composite) 1 V(p-p)/75 Ω
S-VIDEO Y (luminance):1 V(p-p)/75 Ω
C (chrominance, burst):0.286 V(p-p)/75 Ω
COMPONENT (Y):1 V(p-p)/75 Ω
(PB/PR):0.7 V(p-p)/75 Ω
Speakers/Impedance 4 Ω - 16 Ω
Tuner section FM tuning range 87.5 MHz - 108.0 MHz
AM (MW) tuning range 531 kHz - 1 710 kHz (at 9 kHz intervals)
530 kHz - 1 710 kHz (at 10 kHz intervals)
Tape section Frequency response 60 Hz - 14 000 Hz
Wow and flutter 0.15% (WRMS)
Disc player section Playable disc DVD Video/DVD Audio
CD/VCD/SVCD
CD-R/CD-RW (CD/SVCD/VCD/MP3/WMA/JPEG format)
DVD-R/DVD-RW (Video format)
Dynamic range 90 dB
Horizontal resolution 500 lines
Wow and flutter Immeasurable
Speakers Speaker units HIGH 4 cm cone × 1
LOW 10 cm cone × 1
Impedance HIGH 4 Ω
LOW 4 Ω
Dimensions (approx.) 145 mm × 230 mm × 202 mm (W/H/D)
Mass (approx.) 2.2 kg each
General Power requirement AC 110 V/AC 127 V/AC 220 V/ AC 230 V - AC 240 V (adjustable with the
voltage selector) 50 Hz/60 Hz
Power consumption 90 W (at operation) 4.9 W (on standby)
Dimensions (approx.) 170 mm × 230 mm × 311 mm (W/H/D)
Mass (approx.) 5.6 kg
Designs and Specifications are subject to change without notice.
1-2 (No.MB286)
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.MB286)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 section
Connector
Pickup
1-4 (No.MB286)
Card wire
Traverse mechanism assembly
1.8 Important for laser products
!
1.CLASS 1 LASER PRODUCT
2.DANGER : Invisible laser radiation when open and inter
lock failed or defeated. Avoid direct exposure to beam.
3.CAUTION : There are no serviceable parts inside the
Laser Unit. Do not disassemble the Laser Unit. Replace
the complete Laser Unit if it malfunctions.
4.CAUTION : The CD,MD and DVD player uses invisible
laser radiation and is equipped with safety switches which
prevent emission of radiation when the drawer is open and
the safety interlocks have failed or are defeated. It is
dangerous to defeat the safety switches.
5.CAUTION : If safety switches malfunction, the laser is able
to function.
6.CAUTION : Use of controls, adjustments or performance of
procedures other than those specified here in may result in
hazardous radiation exposure.
Please use enough caution not to
see the beam directly or touch it
in case of an adjustment or operation
check.
REPRODUCTION AND POSITION OF LABELS
WARNING LABEL
CAUTION : Visible and Invisible
laser radiation when open and
interlock failed or defeated.
AVOID DIRECT EXPOSURE TO
BEAM. (e)
CLASS 1
LASER PRODUCT
ADVARSEL : Synlig og usynlig
laserstråling når maskinen er
åben eller interlocken fejeler.
Undgå direkte eksponering til
stråling. (d)
CAUTION : Visible and Invisible
laser radiation when open and
interlock failed or defeated.
AVOID DIRECT EXPOSURE TO
BEAM. (e)
VARNING : Synlig och
osynling laserstrålning när
den öppnas och spärren är
urkopplad. Betrakta ej
strålen. (s)
VARNING : Synlig och
osynling laserstrålning när
den öppnas och spärren är
urkopplad. Betrakta ej
strålen. (s)
VARO : Avattaessa ja suojalukitus
ohitettuna tai viallisena olet alttiina
näkyvälle ja näkymättömälle
lasersäteilylle. Vältä säteen
kohdistumista suoraan itseesi. (f)
ADVARSEL : Synlig og usynlig
laserstråling når maskinen er
åben eller interlocken fejeler.
Undgå direkte eksponering til
stråling. (d)
VARO : Avattaessa ja suojalukitus
ohitettuna tai viallisena olet alttiina
näkyvälle ja näkymättömälle
lasersäteilylle. Vältä säteen
kohdistumista suoraan itseesi. (f)
(No.MB286)1-5
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.
1-6 (No.MB286)
SECTION 3
A
DISASSEMBLY
3.1 Main body section
3.1.1 Removing the side panels L/R
(See Figs.1 to 4)
(1) From the back side of the main body, remove the four
screws A attaching the side panels L/R to the rear panel.
(See Fig.1.)
(2) From the bottom side of the main body, remove the two
screws B attaching the side panels L/R to the bottom chassis. (See Fig.2.)
(3) From the both sides of the main body, release the engage-
ment sections (a, b) of the side panels L/R from the top
cover assembly in the direction of the arrow. (See Figs.3
and 4.)
(4) Remove the side panels L/R toward this side.
Top cover assembly
a
a
a
Side panel R
B
Rear panel
Fig.1
Side panel L
Side panel R
A
Side panel R
Fig.3
Top cover assembly
b
b
b
B
Side panel L
Fig.4
Side panel L
Bottom chassis
Fig.2
(No.MB286)1-7
3.1.2 Removing the front panel assembly
(See Figs.5 to 8)
• Prior to performing the following procedures, remove the side
panels L/R.
(1) From the right side of the main body, push the slide cam
and pull the tray out of the main body in the direction of the
arrow 1. (See Fig.5.)
(2) Remove the tray fitting from the tray in the direction of the
arrow 2. (See Fig.5.)
(3) From the both sides of the main body, remove the two
screws C attaching the front panel assembly. (See Figs.6
and 7.)
(4) Release the two claws c and claws d to draw out the front
panel assembly in the direction of the arrow. (See Figs.6
and 7.)
(5) From the right side of the main body, disconnect the card
wire from the connector CN730
Fig.8.)
(6) Disconnect the wire from the connector CN270
board. (See Fig.8.)
(7) Remove the front panel assembly in the direction of the ar-
row. (See Fig.8.)
Front panel assembly
on the main board. (See
on the main
c
Front panel assembly
Fig.7
C
d
2
1
Tray assembly
Tray fitting
C
Slide cam
Fig.5
c
Card wire
Wire
Front panel assembly
CN270
Fig.8
Main board
CN730
Front panel assembly
1-8 (No.MB286)
d
Fig.6
3.1.3 Removing the top cover assembly
(See Figs.9 to 11)
• Prior to performing the following procedures, remove the side
panels L/R and front panel assembly.
(1) From the back side of the main body, remove the screw D
attaching the top cover assembly to the rear panel. (See
Fig.9.)
(2) From the right side of the main body, disconnect the card
wires from the connectors (CN701
board. (See Fig.10.)
(3) From the left side of the main body, disconnect the card
wire from connector CN601
board. (See Fig.11.)
Reference:
When reassembling, pass the card wire through the section e of the microphone amplifier board before connecting the card wire to the connector CN601
(4) Take out the top cover assembly from the main body.
Top cover assembly
, CN702) on the main
on the microphone amplifier
. (See Fig.11.)
Top cover assembly
Card wires
Rear panel
D
Fig.9
CN702
Main board
Fig.10
Microphone amplifier board
e
CN601
Card wire
Fig.11
CN701
(No.MB286)1-9
3.1.4 Removing the cassette mechanism assembly
(See Fig.12)
• Prior to performing the following procedures, remove the side
panels L/R, front panel assembly and top cover assembly.
(1) From the bottom side of the top cover assembly, discon-
nect the card wires from the connectors (CN33
the head amp. & mechanism control board.
(2) Remove the four screws E and csrew F attaching the cas-
sette mechanism assembly and take out the cassette
mechanism assembly from the top cover assembly.
3.1.5 Removing the microphone amplifier board
(See Fig.12)
• Prior to performing the following procedures, remove the side
panels L/R, front panel assembly and top cover assembly.
(1) From the bottom side of the top cover assembly, remove
the two screws G attaching the echo board and remove the
echo board.
(2) Take out the microphone amplifier board from the top cover
assembly.
, CN34) on
Card wires
Top cover assembly
E
F
Microphone amplifier board
Echo board
G
3.1.6 Removing the rear panel
(See Fig.13)
• Prior to performing the following procedures, remove the side
panels L/R.
(1) From the back side of the main body, remove the fourteen
screws H attaching the rear panel.
(2) Release the engagement sections f and remove the rear
panel.
E
CN34
Head amp. & mechanism control board
CN33
Cassette mechanism assembly
Fig.12
E
H
1-10 (No.MB286)
H
H
f
Rear panel
Fig.13
f
3.1.7 Removing the tuner
(See Fig.14)
• Prior to performing the following procedures, remove the side
panels L/R and rear panel.
Disconnect the card wire from the connector CN1
3.1.8 Removing the video board
(See Fig.15)
• Prior to performing the following procedures, remove the side
panels L/R and rear panel.
(1) From the forward side of the video board, disconnect the
card wires from connectors (CN300
(2) Disconnect the wire to the connector CN301 on the video
board.
Reference:
After connecting the wire to the connector CN301
wire holder as before.
, CN302).
on the tuner.
, fix it with the
Card wire
CN1
Tuner
Fig.14
CN300
CN301
3.1.9 Removing the fan
(See Figs.15 and 16)
• Prior to performing the following procedures, remove the side
panels L/R, front panel assembly, top cover assembly and rear
panel.
(1) From the forward side of the video board, disconnect the
wire from connector CN301
Reference:
After connecting the wire to the connector CN301
with the wire holder as before.
(2) From the back side of the main body, remove the two
screws J attaching the fan to the fan bracket B. (See
Fig.16.)
Reference:
When removing the fan with the fan bracket B, remove
the two screws K attaching the fan bracket B to the heat
sink B. (See Fig.16.)
(3) Take out the fan from the main body.
. (See Fig.15.)
, fix it
CN302
Fan bracket B
Video board
Fig.15
Heat sink B
K
Fan bracket B
J
J
Fan
Fig.16
(No.MB286)1-11
3.1.10 Removing the main board
(See Fig.17)
• Prior to performing the following procedures, remove the side
panels L/R, front panel assembly, top cover assembly, tuner
and rear panel.
(1) From the right side of the main body, remove the wire loca-
ter.
Reference:
After attaching the main board, attach the wire locater as
before.
(2) Remove the two screws L attaching the main board.
(3) Remove the main board toward this side and disconnect
the connector CN200
(4) From the forward side of the main board, disconnect the
card wires from the connectors (CN210
).
CN720
on the main board.
, CN220, CN710,
CN210
CN200
CN720
Wire locater
Main board
CN710
3.1.11 Removing the power supply board
(See Fig.18)
• Prior to performing the following procedures, remove the side
panel L and rear panel.
(1) From the left side of the main body, remove the two screws
M attaching the power supply board.
(2) Remove the power supply board toward this side and dis-
connect the connector CN104
(3) From the forward side of the power supply board, discon-
nect the wires from the connectors (CN101
CN103, CN105).
Reference:
When attaching the power supply board, insert the section g of
the power supply board in the hole of the bottom chassis before attaching the two screws M.
on the power supply board.
, CN102,
CN102
CN101
M
CN105
g
CN103
L
Card wire
Fig.17
M
L
CN220
Power supply board
CN104
1-12 (No.MB286)
Fig.18
3.1.12 Removing the power amplifier board
(See Fig.19)
• Prior to performing the following procedures, remove the side
panels L/R, front panel assembly, top cover assembly, rear
panel, tuner, video board, main board and power supply board.
(1) From the top side of the main body, disconnect the card
wire from the connector CN404
board.
(2) Remove the four screws N attaching the power amplifier
board.
(3) Lift the power amplifier board and remove it from the en-
gagement sections (h, i) of the shield case.
3.1.13 Removing the heat sink B and heat sink
(See Figs.20 and 21)
• Prior to performing the following procedure, remove the side
panels L/R, front panel assembly, top cover assembly, rear
panel and fan.
(1) From the front side of the main body, remove the three
screws P attaching the heat sink B to the heat sink. (See
Fig.20.)
(2) From the back side of the main body, remove the three
screws Q attaching the heat sink to the power amplifier
board. (See Fig.21.)
(3) From the top side of the main body, remove the two screws
R attaching the heat sink to the power amplifier board. (See
Fig.21.)
Reference:
Remove the tuner and video board as required.(See Figs.14
and 15.)
on the power amplifier
Shield case
h
Heat sink B
N
Fig.19
Power amplifier board
N
i
CN404
Card wire
Heat sink
P
Fig.20
R R
Power amplifier board
Heat sink
Q
Fig.21
(No.MB286)1-13
3.1.14 Removing the DVD mechanism assembly
(See Figs.22 and 23)
• Prior to performing the following procedures, remove the side
panels L/R, front panel assembly, top cover assembly, rear
panel, tuner, video board, main board and power supply board.
(1) From the top side of the main body, remove the four screws
S attaching the shield case to the bottom chassis. (See
Fig.22.)
Reference:
When attaching the shield case on the bottom chassis,
align the projections (j, k, m, n) of the bottom chassis in
the holes of the shield case. (See Fig.22.)
(2) Take out the shield case with the power amplifier board
from the bottom chassis.
(3) Remove the three screws T attaching the DVD mechanism
assembly to the bottom chassis. (See Fig.23.)
S
Shield case
k
Bottom chassis
S
j
m
Power amplifier board
Fig.22
DVD mechanism assembly
Bottom chassis
n
S
T
T
1-14 (No.MB286)
Fig.23
3.1.15 Removing the power transformer
(See Figs.24 and 25)
• Prior to performing the following procedures, remove the side
panels L/R, front panel assembly, top cover assembly, rear
panel, fan and main board.
(1) From the forward side of the power supply board, discon-
nect the wires from the connectors (CN102
CN105). (See Fig.24.)
Reference:
Remove the tuner, video board and the power supply
board as required. (See Figs.14, 15 and 18.)
(2) From the top side of the main body, remove the four screws
U attaching the power transformer. (See Fig.25.)
, CN103,
CN102
CN103
CN105
Power transformer Bottom chassis
Power supply board
Fig.24
U
U
U
Fig.25
(No.MB286)1-15
3.1.16 Removing the FL board
(See Fig.26)
• Prior to performing the following procedures, remove the side
panels L/R and front panel assembly.
(1) From the inside of the front panel assembly, remove the
three screws V and screw V’ attaching the FL board.
Reference:
When attaching the screw V’, attach the wire holder with
it and fix the wire with the wire holder as before.
(2) Take out the FL board from the front panel assembly and
disconnect the card wire from the connector CN751
FL board.
Reference:
When attaching the FL board, align the projections p of
the front panel assembly in the holes of the FL board.
on the
CN751
Card
wire
Wire
V
p
FL board
Wire holder
V
p
V
V'
Front panel assembly
Fig.26
1-16 (No.MB286)
3.1.17 Removing the switch board
(See Figs.27 and 28)
• Prior to performing the following procedures, remove the side
panels L/R and front panel assembly.
(1) From the front side of the front panel assembly, pull out the
volume knob in to the direction of the arrow. (See Fig.27.)
(2) From the inside of the front panel assembly, remove the
ten screws W attaching the switch board. (See Fig.28.)
(3) Take out the switch board from the front panel assembly
and disconnect the card wire from the connector CN760
the switch board. (See Fig.28.)
Reference:
• When removing the switch board, remove the wire holder as
required. (See Fig.26.)
• When attaching the switch board, align the projections q of
the front panel assembly in the holes of the switch board.
(See Fig.28.)
on
Front panel assembly
Microphone
volume knob
Fig.27
Card wire
CN760
W
Switch board
Wire holder
q
Fig.28
W
q
W
(No.MB286)1-17
3.1.18 Removing the headphone jack board
(See Fig.29)
• Prior to performing the following procedure, remove the side
panels L/R and front panel assembly.
(1) From the inside of the front panel assembly, remove the
screw X attaching the headphone jack board.
(2) Take out the headphone jack board from the front panel as-
sembly.
Reference:
After attaching the headphone jack board, fix the wire with the
spacer and wire holder as before.
Wire
Wire holder
X
Headphone jack board
Spacer
Fig.29
1-18 (No.MB286)
3.2 DVD mechanism section
• Prior to performing the following procedures, remove the DVD mechanism assembly from the main body.
(See "3.1.14 Removing the DVD mechanism assembly".)
3.2.1 Removing the tray assembly
(See Figs.1 to 3)
(1) From the right side of the DVD mechanism assembly, push
the slide cam and pull the tray assembly out of the DVD
mechanism assembly in the direction of the arrow. (See
Fig.1.)
(2) From the top side of the DVD mechanism assembly, re-
move the two screws A attaching the leaf spring to the
bushing and remove the leaf spring. (See Fig.2.)
(3) Remove the bushing of the tray assembly from the projec-
tion a on the DVD mechanism assembly and move the tray
assembly in the direction of the arrow. (See Fig.3.)
(4) Remove the claw b of the tray assembly from the DVD
mechanism assembly and take out the tray assembly. (See
Fig.3.)
Tray assembly
Slide cam
Leaf spring
DVD mechanism assembly
Fig.1
Bushing
A
DVD mechanism assembly
Fig.2
Projection a
Claw b
DVD mechanism assembly
Fig.3
Bushing
Tray assembly
(No.MB286)1-19
3.2.2 Removing the traverse mechanism assembly
(See Figs.4)
(1) From the bottom side of the DVD mechanism assembly, re-
move the three screws B and screw B’ attaching the
traverse mechanism assembly and take out the DVD
traverse mechanism assembly with the DVD servo board.
Reference:
When attaching the screw B’, attach the washer with it.
B'
Washer
DVD mechanism assembly
B'
3.2.3 Removing the DVD servo board
(See Figs.5 and 6)
• Prior to performing the following procedures, remove the
traverse mechanism assembly.
(1) From the side of the traverse mechanism assembly, solder
the short land sections c on the pickup. (See Fig.5.)
(2) From the bottom side of the traverse mechanism assem-
bly, release the lock of the connector CN101
servo board in the direction of the arrow 1 and disconnect
the card wire. (See Fig.6.)
Caution:
• Solder the short land sections c on the pickup before
disconnecting the card wire from the connector CN101
on the DVD servo board. If the card wire is disconnected without attaching solder, the pickup may be destroyed by static electricity. (See Figs.5 and 6.)
• When attaching the DVD servo board, be sure to remove solders from the short land sections c after connecting the card wire to the connector CN101
DVD servo board. (See Figs.5 and 6.)
(3) Disconnect the card wire from the connector CN201
DVD servo board. (See Fig.6.)
(4) Remove the two screws C attaching the DVD servo board.
(See Fig.6.)
(5) Remove the DVD servo board from the engagement sec-
tion d in an upward and remove the engagement section f
in the direction 3 while removing the engagement section e
in the direction of the arrow 2. (See Fig.6.)
on the DVD
on the
on the
B
Traverse mechanism assembly
Fig.4
Short land section c
Traverse mechanism assembly
Fig.5
CN101
C
Card wire
d
1
2
Card wire
1
B
DVD servo board
Pickup
CN201
C
f
3
1-20 (No.MB286)
e
DVD servo board
Traverse mechanism assembly
Fig.6
3.2.4 Removing the pickup
(See Figs.5,7 to 9)
• Prior to performing the following procedures, remove the
traverse mechanism assembly.
(1) From the side of the traverse mechanism assembly, solder
the short land sections c on the pickup. (See Fig.5.)
(2) Release the lock of the connector on the pickup in the di-
rection of the arrow and disconnect the card wire. (See
Fig.7.)
Caution:
• Solder the short land sections c on the pickup before
disconnecting the card wire from the connector on the
pickup. If the card wire is disconnected without attaching solder, the pickup may be destroyed by static electricity. (See Figs.5 and 7.)
• When attaching the pickup, be sure to remove solders
from the short land sections c after connecting the
card wire to the connector on the pickup. (See Figs.5
and 7.)
(3) Remove the screw D attaching the plate and thrust spring.
(See Fig.7.)
(4) Remove the engagement section g attaching the plate to
the feed holder and remove the plate with the thrust spring.
(See Fig.7.)
(5) Remove the shaft of the pickup from the section h on the
traverse mechanism assembly and remove the shaft from
the section i while moving it in the direction of the arrow.
(See Fig.8.)
(6) Remove the pickup from the section j of the traverse mech-
anism assembly and take out the pickup with the shaft.
(See fig.8.)
(7) From the bottom side of the pickup, remove the two screws
E attaching the SW actuator and LEAD spring. (See Fig.9.)
(8) Pull the shaft out of the pickup. (See Fig.9.)
Plate
D
Card wire
Feed holder
h
Shaft
Thrust spring
g
Connector
Fig.7
Traverse mechanism assembly
Pickup
i
Pickup
Shaft
j
Fig.8
Pickup
SW actuator
LEAD spring
E
Fig.9
(No.MB286)1-21
3.2.5 Attaching the pickup
(See Figs.5,7 to 10)
• See "3.2.4 Removing the pickup".
(1) Attach the shaft, SW actuator and LEAD spring to the pick-
up. (See Fig.9.)
(2) Align the pickup to the section j of the traverse mechanism
assembly first, and set the both ends of the shaft of the
pickup in the sections g and i of the traverse mechanism
assembly. (See Fig.8.)
(3) Attach the plate and thrust spring. (See Fig.7.)
(4) Remove solders from the short land sections c after con-
necting the card wire to the connector on the pickup. (See
Figs.5 and 7.)
(5) Turn the feed gear M in the direction of the arrow 1 to move
the pickup in the direction of the arrow 2. (See Fig.10.)
3.2.6 Removing the feed motor
(See Figs.7,11 and 12)
• Prior to performing the following procedures, remove the
traverse mechanism assembly.
(1) From the top side of the traverse mechanism assembly, re-
move the screw D attaching the plate and thrust spring.
(See Fig.7.)
(2) Remove the engagement section g attaching the plate to
the feed holder and remove the plate with the thrust spring.
(See Fig.7.)
(3) Remove the wires from the soldered section k on the spin-
dle motor board. (See Fig.11.)
Reference:
When attaching the feed motor, pass the wire through
the section m on the spindle base. (See Fig.11.)
(4) Remove the feed holder, feed motor, lead screw, feed gear
E and feed gear M at the same time after removing the two
screws F attaching the feed holder. (See Fig.11.)
(5) From the side of the feed holder, remove the two screws G
attaching the feed motor. (See Fig.12.)
Feed gear M
1
Feed gear M
Feed gear E
F
F
Feed holder
2
Fig.10
Feed motor
Spindle base
Spindle motor board
Fig.11
Pickup
Lead screw
Wires
Feed holder
m
k
1-22 (No.MB286)
G
Fig.12
3.2.7 Removing the spindle motor board
(See Figs.11 and 13)
• Prior to performing the following procedures, remove the
traverse mechanism assembly and DVD servo board.
(1) From the top side of the traverse mechanism assembly, re-
move the wires from the soldered section k on the spindle
motor board. (See Fig.11.)
(2) From the bottom side of the traverse mechanism assem-
bly, remove the three screws H attaching the spindle motor
board. (See Fig.13.)
3.2.8 Removing the switch board
(See Fig.14.)
(1) From the bottom side of the DVD mechanism assembly, re-
move the wires from the soldered section n on the switch
board.
(2) Lift the switch board while pressing the claw p of the DVD
mechanism assembly in the direction of the arrow and remove it from the section q.
Reference:
• Put the wires on the section r after attaching the switch
board to the DVD mechanism assembly.
• Fix the claw p on the DVD mechanism assembly with bonds
after attaching the switch board.
3.2.9 Removing the motor
(See Figs.14 and 15)
• Prior to performing the following procedures, remove the tray
assembly.
(1) From the bottom side of the DVD mechanism assembly, re-
move the wires from the soldered section n on the switch
board. (See Fig.14.)
(2) From the top side of the DVD mechanism assembly, re-
move the belt from the motor pulley. (See Fig.15.)
Note:
Take care not to attach grease on the belt.
(3) Remove the two screws J attaching the motor to the DVD
mechanism assembly and take out the motor from the bottom side of the DVD mechanism assembly. (See Fig.15.)
Reference:
Put the wires on the section r after attaching the motor to
the DVD mechanism assembly. (See Fig.14.)
H
Switch board
Soldered
section n
q
r
DVD mechanism assembly
J
Traverse mechanism assembly
Fig.13
Wires
Claw p
DVD mechanism assembly
Fig.14
Belt
Fig.15
Motor pulley
(No.MB286)1-23
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
1-24 (No.MB286)
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.MB286)1-25
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