JVC TN2007-1001 User manual

SERVICE MANUAL
COPYRIGHT © 2005 Victor Company of Japan, Limited No.MY003
2005/12
CD MECHANISM
MY003200512
TN2007-1001
Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)
TABLE OF CONTENTS
1 PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19

1-2 (No.MY003)
SECTION 1
PRECAUTIONS
1.1 Safety Precautions
!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.
!Please use enough caution not to see the beam directly or touch it in case of an
adjustment or operation check.

(No.MY003)1-3
1.2 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.
1.2.1 Grounding to prevent damage by static electricity
Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as CD players.
Be careful to use proper grounding in the area where repairs are being performed.
(1) Ground the workbench
Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over it before placing the
traverse unit (optical pickup) on it.
(2) Ground yourself
Use an anti-static wrist strap to release any static electricity built up in your body.
(3) Handling the optical pickup
• In order to maintain quality during transport and before installation, both sides of the laser diode on the replacement optical
pickup are shorted. After replacement, return the shorted parts to their original condition.
(Refer to the text.)
• Do not use a tester to check the condition of the laser diode in the optical pickup. The tester's internal power source can easily
destroy the laser diode.
1.3 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) It is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it.
1.4 Attention when traverse unit is decomposed
*Please refer to "Disassembly method" in the text for the CD pickup unit.
• Apply solder to the short land before the flexible wire is disconnected from the connector on the CD pickup unit.
(If the flexible wire is disconnected without applying solder, the CD pickup may be destroyed by static electricity.)
• In the assembly, be sure to remove solder from the short land after connecting the flexible wire.
1M
(caption)
Anti-static wrist strap
Conductive material
(conductive sheet) or iron plate
Wires Push switch
Pickup
Base board
Pickup
Connector
Flexible wire
Frame CD mechanism
assembly

1-4 (No.MY003)
1.5 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.
REPRODUCTION AND POSITION OF LABELS
!
Please use enough caution not to
see the beam directly or touch it
in case of an adjustment or operation
check.
WARNING LABEL
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)
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)
CLASS 1
LASER PRODUCT

(No.MY003)1-5
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.

1-6 (No.MY003)
SECTION 3
DISASSEMBLY
3.1 CD mechanism assembly
3.1.1 Removing the top cover
(See Figs.1 and 2)
(1) From the both side of the CD mechanism assembly, re-
move the four screws Aattaching the top cover. (See
Fig.1.)
(2) Lift the front side of the top cover and move the top cover
backward to release the two joints a. (See Figs.1 and 2.)
Fig.1
Fig.2
A
A
A
a
Top cover
A
a
Top cover

(No.MY003)1-7
3.1.2 Removing the push switch
(See Figs.3)
(1) From the bottom side of the CD mechanism assembly, re-
move the screw Battaching the push switch.
(2) Take out the push switch from the CD mechanism assem-
bly.
Reference:
Remove the wires from soldered sections bof the push switch
as required.
3.1.3 Removing the base board
(See Figs.3 and 4)
Caution:
Solder the short land cbefore the flexible wire is disconnected
from the connector on the pickup. If the flexible wire is discon-
nected without applying solder, the pickup may be destroyed
by static electricity. (See Fig.3.)
(1) From the bottom side of the CD mechanism assembly, re-
move the screw Cattaching the base board. (See Figs.3
and 4.)
(2) Solder the short land c on the pickup. (See Fig.3.)
(3) Disconnect the flexible wire from the connector on the pick-
up. (See Fig.3.)
(4) Remove the base board from the joints dof the frame in the
direction of the arrow. (See Figs.3 and 4.)
Reference:
Remove the wires from the soldered sections eon the base
board as required. (See Fig.3.)
Caution:
When reattaching the base board, be sure to remove solder
from the short land c after connecting the flexible wire. (See
Fig.3.)
Fig.3
Fig.4
B
b
Wires Push switch
Pickup
e
C
Base board
d
Pickup
c
Connector
Flexible wire
Frame CD mechanism
assembly
C
Base board
Flexible wire
Frame
d

1-8 (No.MY003)
3.1.4 Removing the chassis unit
(See Figs.5 and 6)
• Remove the top cover and base board.
(1) From the top side of the CD mechanism assembly, remove
the front suspension springs and rear suspension springs
attaching the chassis unit to the frame. (See Fig.5.)
(2) Remove the chassis unit from the dampers on the frame in
an upward direction. (See Fig.6.)
Note:
• Pay attention to misuse and loss of each spring. (See Fig.5.)
• When reassembling, make sure that the three shafts on the
underside of the chassis unit are inserted to the dampers
certainly. (See Fig.6.)
Fig.5
Fig.6
Front suspension spring
Rear suspension spring Rear suspension spring
Front suspension spring
Chassis unit
Frame
Chassis unit
Shaft
Shaft
Shaft
Damper R
Damper F
Damper F
Frame

(No.MY003)1-9
3.1.5 Removing the clamper assembly
(See Figs.7 and 8)
• Remove the top cover.
Move the clamper assembly in the direction of the arrow to re-
lease the joints ffrom the chassis unit.
Fig.7
Fig.8
ff
Clamper assembly
Chassis unit
f
f
Clamper assembly
Chassis unit

1-10 (No.MY003)
3.1.6 Removing the loading/feed motor assembly
(See Fig.9)
• Remove the top cover, base board and chassis unit.
From the bottom side of the chassis unit, remove the screw D
and take out the loading/feed motor assembly in the direction of
the arrow.
Reference:
Remove the wires from the soldered sections gof the loading/
feed motor assembly as required.
Fig.9
D
Loading/feed
motor
assembly
g
Loading/feed motor assembly
Chassis unit

(No.MY003)1-11
3.1.7 Removing the pickup
(See Figs.10 to 12)
• Remove the top cover, base board and chassis unit.
(1) From the bottom side of the chassis unit, remove the screw
Eattaching the pu. shaft holder B and pull the pu. shaft out
of the pu. shaft holder A. (See Fig.10.)
(2) Remove the screw Fattaching the pu. shaft holder A. (See
Fig.10.)
(3) Take out the pickup with pu. shaft holder A and feed screw
assembly from the chassis unit. (See Fig.11.)
(4) Remove the section hof the pu. shaft holder A in the direc-
tion of the arrow. (See Fig.11.)
(5) Remove the feed screw assembly from the section jof the
pickup in the direction of the arrow. (See Fig.11.)
(6) Remove the screw Gattaching the feed screw holder to the
pickup. (See Fig.12.)
Reference:
Remove the feed nut spring from the feed screw holder
as required. (See Fig.12.)
(7) Release the claw kin the direction of the arrow to remove
the feed sub holder. (See Fig.12.)
3.1.8 Reattaching the pickup
(See Figs.10 to 13)
(1) Reattach the feed sub holder to the pickup. (See Fig.12.)
(2) Reattach the feed screw holder to the pickup using the
screw G. (See Fig.12.)
(3) Reattach the feed screw assembly and pu. shaft holder A
to the pickup as before. (See Fig.11.)
(4) Set the section mof the pickup to the rail of the chassis unit
at first and attach the pickup to the chassis unit with the
screw Fas before. (See Figs.10 and 13.)
(5) Attach the pu. shaft to the pickup as before. (See Fig.10.)
(6) Attach the pu. shaft holder B to the chassis unit with the
screw Eas before. (See Fig.10.)
Fig.10
Fig.11
Fig.12
Fig.13
Pu. shaft holder A
Chassis unit
Pu. shaft
Pickup
Pu. shaft holder B
E
F
Pickup
Feed screw assembly
Pu. shaft holder A
h
j
k
Pickup
Feed screw holder
Feed sub holder
GFeed screw
holder
Feed nut
spring
F
Chassis unit
Pickup
m
Rail

1-12 (No.MY003)
3.1.9 Removing the trigger arm
(See Fig.14)
• Remove the top cover, base board, chassis unit and clamper
assembly.
(1) From the top side of the chassis unit, remove the trigger
arm spring from the sections (n, p).
(2) From the bottom side of the chassis unit, release the claws
qof the trigger arm base in the direction of the arrow to re-
move them from the sections rof the chassis unit to the
other side.
Note:
When releasing the claws q, take care not to break them.
(3) From the top side of the chassis unit, move the select arm
R and select lock arm in the direction of the arrow to re-
move the trigger arm base from the section sin the direc-
tion of the arrow.
(4) Remove the trigger arm from the section t.
Fig.14
3.1.10 Removing the top plate assembly
(See Fig.15)
• Remove the top cover, base board, chassis unit, clamper as-
sembly and trigger arm.
(1) Remove the screw Hattaching the top plate assembly.
(2) Move the top plate assembly in the direction of the arrow to
release the joints (u, v).
Reference:
Remove the wires from the soldered sections wof the top plate
assembly as required.
Note:
When reassembling, solder the wires as before.
Fig.15
Chassis unit q
r
Trigger arm base Trigger arm
p
t
n
Trigger arm
spring
s
Select lock arm
Select arm R
Chassis unit
H
w
Wire(Red)
Top plate assembly
Wire(White)
Wire(Brown)
u
v

(No.MY003)1-13
3.1.11 Removing the mode switch
(See Fig.16)
• Remove the top cover, base board, chassis unit, clamper as-
sembly, trigger arm and top plate assembly.
(1) From the top side of the top plate assembly, remove the
link gear spring from the sections xof the link gear L and
link gear R.
(2) Remove the link gear L in an upward direction while releas-
ing the claws yof the link gear L in the direction of the ar-
row.
(3) Move the mode switch in the direction of the arrow 1 to re-
move the sections zof the top plate assembly.
(4) Move the mode switch in the direction of the arrow 2 and
remove the mode switch from the sections (aa, ab).
Note:
When reattaching the link gear L, attach it after aligning the
hole ac of the link gear L to the hole ac of the link gear R.
Reference:
When reassembling, reverse the above removing procedure.
Fig.16
1
2
Link gear L
Link gear R
Top plate assembly
Link gear spring
Mode switch
xy
y
ab
aa
ac ac
Link
gear R Link gear L
z

1-14 (No.MY003)
3.1.12 Removing the select arm R and select lock arm
(See Figs.17 and 18)
• Remove the top cover, base board, chassis unit, clamper as-
sembly, trigger arm and top plate assembly.
(1) From the top side of the top plate assembly, remove the
link gear spring from the sections ad of the link gear L and
link gear R. (See Fig.17.)
(2) Remove the link gear R in an upward direction while releas-
ing the claws ae of the link gear R in the direction of the ar-
row. (See Fig.17.)
(3) Move the select arm R in the direction of the arrow 1 to re-
move the sections af of the top plate assembly. (See
Fig.17.)
(4) Move the select arm R in the direction of the arrow 2 and
remove the select arm R from the sections ag. (See
Fig.17.)
(5) From the bottom side of the top plate assembly, remove
the select lock arm spring from the section ah. (See
Fig.18.)
(6) From the top side of the top plate assembly, remove the
section aj of the select lock arm from the top plate assem-
bly at first and remove the sections (ak, am) of the select
lock arm from the top plate assembly. (See Fig.18.)
Note:
• When removing the select lock arm spring, be careful not to
lose it. (See Fig 18.)
• When reattaching the link gear R, attach it after aligning the
hole an of the link gear R to the hole an of the link gear L.
(See Fig.17.)
Reference:
When reassembling, reverse the above removing procedure.
Fig.17
Fig.18
1
2
Link gear L
Link gear R
Top plate assembly
Link gear spring
ad
ae
ae
an an
Link
gear R Link gear L
ag
af
Select arm R
aj
ak
Select lock arm
Top plate assembly
am
ah
Select lock
arm spring

(No.MY003)1-15
3.1.13 Removing the loading roller assembly
(See Figs.19 to 21)
• Remove the top cover, base board, chassis unit, clamper as-
sembly and top plate assembly.
(1) From the left side of the chassis unit, remove the screw J
attaching the lock arm assembly. (See Fig.19.)
(2) Remove the projection ap of the lock arm assembly from
the joint aq while opening the cam plate R in the direction
of the arrow. (See Fig.19.)
(3) Remove the lock arm assembly from the projection ar of
the chassis unit. (See Fig.19.)
(4) Remove the projection as of the lock arm assembly from
the joint at of the cam plate L assembly. (See Fig.19.)
(5) From the right side of the lock arm assembly, remove the
loading roller spring L from the section au. (See Fig.20.)
(6) From the top side of the lock arm assembly, remove the
loading roller spring R in the direction of the arrow and re-
move the loading roller assembly. (See Fig.20.)
(7) Remove the roller guide R, HL washer and roller guide L
from the both ends of the loading roller assembly. (See
Fig.21.)
Fig.19
Fig.20
Fig.21
aq
ap
at
as
ar
Cam plate L assembly
Cam plate R
Chassis unit
Lock arm assembly
J
au
Loading roller
spring L
Loading roller assembly Loading roller spring R
Lock arm assembly
Roller guide L Roller guide R
HL washer
Loading roller assembly

1-16 (No.MY003)
3.1.14 Removing the loading gear 1, loading gear 2, loading gear 3 and feed gear 1
(See Fig.22)
• Remove the top cover, base board and chassis unit.
(1) From the bottom side of the chassis unit, pull out the load-
ing gear 1.
(2) Take out the loading gear 2.
(3) Pull out the loading gear 3.
(4) Pull out the feed gear 1.
3.1.15 Removing the loading gear 4, loading gear 5 and
loading gear 6
(See Fig.22)
• Remove the top cover, base board and chassis unit.
(1) From the bottom side of the chassis unit, remove the screw
Kattaching the loading gear bracket.
(2) Take out the loading gear bracket and remove the loading
gear 5 and loading gear 6 from the loading gear bracket.
(3) Pull out the loading gear 4.
3.1.16 Removing the change gear 2, change gear 3A and
change gear 3B
(See Figs.22 and 23)
• Remove the top cover, base board and chassis unit.
(1) From the bottom side of the chassis unit, pull out the load-
ing gear 1. (See Fig.22.)
(2) Pull out the change gear 2. (See Fig.22.)
(3) Pull out the change arm. (See Fig.22.)
(4) Move the change gear plate rivet assembly in the direction
of the arrow 2 to remove the section av of the change gear
plate rivet assembly from the chassis unit while moving the
change lock lever in the direction of the arrow 1. (See
Fig.23.)
(5) Pull out the change gear 3A and change gear 3B from the
change gear plate rivet assembly. (See Fig.23.)
Fig.22
Fig.23
3.1.17 Removing the cam plate L assembly
(See Fig.24)
• Remove the top cover, base board, chassis unit, clamper as-
sembly, top plate assembly and loading roller assembly.
(1) From the left side of the chassis unit, slide the cam plate L
assembly in the direction of the arrow.
(2) Remove the cam plate L assembly from the slots aw of the
chassis unit.
Fig.24
K
Loading gear 4
Loading gear 1
Loading gear 2
Feed gear 1
Feed gear 2
Loading gear 3
Loading gear bracket
Change arm
Chassis unit
Loading gear 6
Loading gear
bracket Loading
gear 5
2
1
Change gear plate rivet assembly
Change gear 3A
Change gear 3B
Chassis unit
Change lock lever
av
Change gear plate
rivet assembly
Change
gear 3A
Change gear 3B
Chassis unit
Cam plate L assembly
aw
aw

(No.MY003)1-17
3.1.18 Removing the cam plate R
(See Fig.25)
• Remove the top cover, base board, chassis unit, clamper as-
sembly, top plate assembly and loading roller assembly.
From the right side of the chassis unit, remove the cam plate R
from the slots ax of the chassis unit.
Reference:
When a slide hook rivet assembly and a trigger rack spring
have come off from the chassis unit, attach them before at-
taching the cam plate R.
3.1.19 Removing the trigger rack plate
(See Figs.25 and 26)
• Remove the top cover, base board, chassis unit, clamper as-
sembly, top plate assembly, loading roller assembly and cam
plate R.
(1) Remove the slide hook rivet assembly and trigger rack
spring from the chassis unit. (See Fig.25.)
(2) From the bottom side of the chassis unit, pull out the load-
ing gear 1. (See Fig.26.)
(3) Remove the trigger control spring from the sections (ay,
az). (See Fig.26.)
(4) Take out the trigger rack plate from the chassis unit. (See
Fig.26.)
Reference:
When attaching the trigger rack plate, insert the projection a'
of the chassis unit in the slot b' on the bottom side of the trigger
rack plate as before. (See Fig.26.)
Fig.25
Fig.26
Chassis unit
Slide hook rivet assembly
Trigger rack spring
Cam plate R
ax
ax
b'
a'
Trigger
rack plate
az
Trigger control spring
ay
Trigger rack plate
Loading gear 1
Chassis unit

1-18 (No.MY003)
3.1.20 Removing the spindle motor assembly
(See Figs.27 and 28)
• Remove the top cover, base board, chassis unit and clamper
assembly.
(1) From the top side of the chassis unit, turn the turn table
from side to side and remove the two screws Mattaching
the spindle motor assembly through the hole of the turn ta-
ble. (See Fig.27.)
(2) From the bottom side of the chassis unit, turn the change
gear 2 in the direction of the arrow 2 while pulling the trigger
arm in the direction of the arrow 1 and let the pickup move
in the direction of the arrow 3. (See Fig.28.)
(3) Slide the spindle motor assembly in the direction of the ar-
row and take out it in an upward direction from the chassis
unit. (See Fig.28.)
Reference:
Remove the wires from the soldered sections c' on the base
board and remove them from the sections (d', e') on the chas-
sis unit as required. Fig.27
Fig.28
MTurn table
Chassis unit
Wire(black) d' e'
Wire(red)
Spindle motor assembly
Change gear 2
Trigger arm
Chassis unit
Pickup
Base board
c' 2
1
3

(No.MY003)1-19
SECTION 4
ADJUSTMENT
This service manual does not describe ADJUSTMENT.
SECTION 5
TROUBLESHOOTING
This service manual does not describe TROUBLESHOOTING.

(No.MY003)
Mobile Entertainment Business Group Mobile Entertainment Category 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan
Victor Company of Japan, Limited
VPT
Printed in Japan