JVC SP-XT9 User manual

SERVICE MANUAL
COPYRIGHT © 2005 Victor Company of Japan, Limited No.MB368
2005/5
COMPACT COMPONENT SYSTEM
MB36820055
DX-T9,DX-T7,DX-T5
Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-51
5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-61
(CA-DXT5) (SP-XST5)(SP-XT5) (SP-XT5)(SP-XST5)(CA-DXT7,CA-DXT9)
DX-T9, DX-T7
Area suffix
A ------------------------ Australia
US ------------------------ Singapore
UW ----------- Brazil,Mexico,Peru
UX -------------------- Saudi Arabia
UG --- Turkey,South Africa,Egypt
UN ----------------------------- Asean
US ------------------------ Singapore
UW ----------- Brazil,Mexico,Peru
UX -------------------- Saudi Arabia
UY ------------------------ Argentina
UG --- Turkey,South Africa,Egypt
UN ----------------------------- Asean
DX-T5
Area suffix
DX-T9
DX-T7
DX-T5
Main body
CA-DXT9
CA-DXT7
CA-DXT5
Front speaker
SP-XT9
SP-XT7
SP-XT5
Subwoofer
SP-WT9
SP-WT7
---
Surround speaker
SP-XST9
SP-XST7
SP-XST5
Center speaker
SP-XCT9
SP-XCT7
SP-XCT5

1-24 (No.MB368)
3.2 DVD changer mechanism assembly section
Remove the DVD changer mechanism assembly from the main body. (See "Removing the DVD changer mechanism assembly".)
3.2.1 Removing the tray assemblies
(See Figs.1 to 5)
(1) From the top side of the main body, remove the two screws
Afrom the top cover and release the two joints aon the
both sides of the DVD changer mechanism assembly. (See
Figs.1 and 2.)
(2) Remove the two rods from the top cover and remove the
top cover from the lifter assembly. (See Figs.1 and 2.)
(3) Remove the open det. lever on the left side of the DVD
changer mechanism assembly. (See Fig.3.)
(4) From the right side of the DVD changer mechanism as-
sembly, draw out the tray assemblies toward the front while
pushing the part bof the side (R) assembly. (See Figs.4
and 5.)
Note:
The tray can be locked if all tray assemblies are at-
tached.
(5) From the topside of the DVD changer mechanism assem-
bly, move the stopper tabs cin the direction of the arrow
and release them. Pull out the tray assemblies from the
DVD changer mechanism assembly. (See Fig. 5.)
Note:
Remove the tray assembly from top tray 5 in order.
Reference:
When reattaching the tray assembly, or when removing the
disc remaining inside, refer to another section "3.3.15 Taking
out the disc in the play mode". Fig.1
Fig.2
Top cover
Lifter assembly
Rods
A
a
a
A
a
Rods Top cover
Lifter assembly
a

(No.MB368)1-25
Fig.3
Fig.4
Fig.5
Open det. leve
r
b
Tray assemblies Side(R) assembly
c
Tray assembly

1-26 (No.MB368)
3.2.2 Removing the DVD servo board
(See Figs.6 to 8)
Caution:
Solder the short land sections don the DVD pickup before dis-
connecting the card wire extending from the DVD pickup. If
you do not follow this instruction, the DVD pickup may be dam-
aged.
(1) From the topside of the DVD changer mechanism assem-
bly, solder the short land sections don the DVD pick up.
(See Fig.6.)
(2) From the bottom side of the DVD changer mechanism as-
sembly, disconnect the card wire from the connectors
(CN201, CN451) on the DVD servo board. (See Fig.7.)
Reference:
When connecting the card wire to the connector CN451,
pass it through the sections eon the DVD traverse
mechanism assembly. (See Fig.7.)
(3) Disconnect the wires from the connectors (CN452, CN453)
on the DVD servo board. (See Fig.7.)
(4) Remove the two screws Battaching the DVD servo board.
(See Fig.7.)
(5) From the reverse side of the DVD servo board, release the
lock of the connector CN101 in the direction of the arrow
and disconnect the card wire. (See Fig.8.)
Caution:
Unsolder the solders from the short land sections dafter reas-
sembling. (See Fig.6.)
3.2.3 Removing the switch board
(See Fig.7)
(1) From the bottom side of the DVD changer mechanism as-
sembly, remove the screw Cattaching the switch board on
the DVD changer mechanism assembly.
(2) Disconnect the wires from the connectors (CN452, CN453)
on the DVD servo board.
(3) Release the wires from the section fand remove the switch
board.
(4) Release the wires from the sections gand remove the
switch board.
Reference:
When reassembling, pass the wires through the sections (f, g)
as before.
Fig.6
Fig.7
Fig.8
DVD pickup
DVD changer mechanism assembly
d
C
DVD changer mechanism assembly
B
B
CN201
eCN453
CN451
Switch board
DVD traverse mechanism assembly
DVD servo board
f
g
CN452
DVD servo board CN101
Lock

(No.MB368)1-27
3.2.4 Removing the motor board
(See Figs.9 and 10)
(1) From the top side of the DVD changer mechanism assem-
bly, remove the two belts from the motor pulleys. (See
Fig.9.)
Note:
Take care not to attach grease on the belt.
(2) Remove the two screws Dattaching the motors to the load-
er assembly. (See Fig.9.)
(3) From the bottom side of the DVD changer mechanism as-
sembly, remove the two screws E. (See Fig.10.)
(4) Disconnect the connector CN2 on the motor board from the
tray switch board and remove the motor board. (See
Fig.10.)
(5) Disconnect the card wire from the connector CN1 on the
forward side of the motor board. (See Fig.10.)
Note:
When connecting the card wire, let the card wire through the
slots hof the motor board. (See Fig.10.)
Reference:
You need not to remove the tray assemblies, and in such case,
move it.
3.2.5 Removing the motor
(See Fig. 10)
• Remove the motor board.
(1) From the reverse side of the motor board, unsolder the four
soldered sections ion the motor board.
(2) From the forward side of the motor board, remove the mo-
tors.
Fig.9
Fig.10
Motor Motor
Motor pulleys Loader assembly
Belt
Belt
D
D
E
h
CN2
Motors
i
CN1
E
Motor board
DVD changer mechanism assembly
Tray switch
board
Motors
Motor board

1-28 (No.MB368)
3.2.6 Removing the DVD traverse mechanism assembly
(See Fig.11)
• Remove the tray assemblies and DVD servo board.
(1) From the bottom side of the DVD changer mechanism as-
sembly, remove the three screws Fattaching the DVD
traverse mechanism assembly.
(2) Remove the wires from the section j.
(3) Take out the DVD traverse mechanism assembly from the
DVD changer mechanism assembly.
Fig.11
F
F
j
F
DVD changer mechanism assembly
DVD traverse mechanism assembly

(No.MB368)1-29
3.2.7 Removing the DVD pickup
(See Figs.12 to 14)
• Remove the tray assemblies, DVD servo board and DVD
traverse mechanism assembly.
(1) From the top side of the DVD traverse mechanism assem-
bly, release the lock of the connector on the DVD pickup
and disconnect the card wire in the direction of the arrow.
(See Fig.12.)
(2) Turn the screw shaft gear in the direction of the arrow 1 to
move the DVD pickup in the direction of the arrow 2. (See
Fig.12.)
(3) Remove the screw Gattaching the feed bracket and re-
move the feed bracket from the sections k. (See Fig.12.)
(4) Release the claw mof the thrust spring in the direction of
the arrow and remove the thrust spring. (See Fig.12.)
(5) Remove the guide shaft from the sections (n, p) on the
C.TM chassis. (See Fig.13.)
(6) Remove the section qof the DVD pickup. (See Fig.13.)
(7) Remove the two screws Hattaching the rack arm spring
and rack arm. (See Fig.14.)
(8) Pull the guide shaft from the DVD pickup in the direction of
the arrow. (See Fig.14.)
3.2.8 Attaching the DVD pickup
(See Figs.12 to 14)
(1) Attach the guide shaft to the DVD pickup and attach the
rack arm spring and rack arm with the screws H. (See
Fig.14.)
(2) Attach the section qof the DVD pickup to the C.TM chassis
first and attach the guide shaft to the sections (n, p). (See
Fig.13.)
Reference:
When attaching the guide shaft to the section p, attach it
under the rod spring. (See Fig.13.)
(3) Attach the thrust spring and feed bracket with the screw G.
(See Fig.12.)
(4) Turn the screw shaft gear in the direction of the arrow 1 to
move the DVD pickup in the direction of the arrow 2. (See
Fig.15.)
(5) Connect the card wire to the connector on the DVD pickup.
(See Fig.15.)
Fig.12
Fig.13
2
1
Thrust spring
Thrust spring
DVD pickup
Connector
Screw shaft gear
G
DVD traverse mechanism assembly
k
m
Feed bracket
DVD pickup
Guide shaft
C.TM chassis
n
p
Rod spring
q

1-30 (No.MB368)
Fig.14
Fig.15
DVD pickup
Rack arm
Rack arm spring
H
Guide shaft
2
2
2
1
Screw shaft gear
DVD pickup
Connector

(No.MB368)1-31
3.2.9 Removing the spindle motor board
(See Figs.16 and 17)
• Remove the tray assemblies, DVD servo board and DVD
traverse mechanism assembly.
(1) From the top side of the DVD traverse mechanism assem-
bly, remove the wires from the soldered sections ron the
spindle motor board. (See Fig.16.)
(2) From the bottom side of the DVD traverse mechanism as-
sembly, remove the three screws Jattaching the spindle
motor board. (See Fig.17.)
Reference:
When attaching the spindle motor board, let the card wire
through the hole son the C.TM chassis. (See Fig.17.)
Fig.16
Fig.17
r
Spindle motor board
DVD traverse mechanism assembly
J
C.TM chassis
DVD traverse mechanism assembly
s

1-32 (No.MB368)
3.2.10 Removing the feed motor
(See Figs.18 and 19)
• Remove the tray assemblies and DVD traverse mechanism
assembly.
(1) From the top side of the DVD traverse mechanism assem-
bly, remove the screw Kattaching the feed bracket and re-
move the feed bracket from the sections t. (See Fig.18.)
(2) Release the claw uof the thrust spring in the direction of
the arrow and remove the thrust spring. (See Fig.18.)
(3) Remove the screw shaft from the section vand remove it
in the direction of the arrow. (See Fig.19.)
(4) Remove the middle gear. (See Fig.19.)
(5) Remove the screw Lattaching the feed motor to the C.TM
chassis. (See Fig.19.)
(6) Remove the wires from the soldered sections won the
spindle motor board. (See Fig.19.)
(7) Take out the feed motor from the motor base.
Reference:
After attaching the feed motor, pass the wires through the sec-
tions xon the C.TM chassis as before. (See Fig.19.)
Fig.18
Fig.19
Thrust spring
Thrust spring
K
t
u
Feed bracket
Spindle motor board
Screw shaft
Middle gear
C.TM chassis
v
x
w
L