JVC DK1US Service Manual

SERVICE MANUAL

COMPACT COMPONENT SYSTEM

MB51520066

MX-DK1US,MX-DK1UW,MX-DK1UG,MX-DK1UN,

MX-DK3US,MX-DK3UW,MX-DK3UG,MX-DK3UN,MX-DK15UN

CA-MXDK3 SP-MXDK3FSP-MXDK3F

SP-MXDK1F SP-MXDK1F

Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)

CA-MXDK1

CA-MXDK15SP-MXDK15F SP-MXDK15F

SP-MXDK3W

TABLE OF CONTENTS

1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19

5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21

COPYRIGHT © 2006 Victor Company of Japan, Limited

No.MB515

2006/6

1.8 Important for laser products

1.CLASS 1 LASER PRODUCT

2.CAUTION :

(For U.S.A.) Visible and/or invisible class II laser radiation
when open. Do not stare into beam.
(Others) Visible and/or invisible class 1M laser radiation
when open. Do not view directly with optical instruments.

3.CAUTION : Visible and/or invisible laser radiation when
open and inter lock failed or defeated. Avoid direct
exposure to beam.

4.CAUTION : This laser product uses visible and/or 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 and PRINT

WARNING LABEL and PRINT

1-6 (No.MB515)

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.

(No.MB515)1-7

SECTION 3

DISASSEMBLY

3.1 Main body

3.1.1 Removing the metal cover
(See Fig.1, 2)

(1) Remove the six screws A attaching the metal cover. (See

Fig.1)

(2) Remove the two screws B attaching the metal cover. (See

Fig.2)

L
A

A

K

J

A

A

A

Fig.1

B

Fig.2

1-8 (No.MB515)

3.1.2 Removing the DVD mechanism assembly

(See Fig.3)

(1) Disconnect the card wires from connector CN300

and CN303 of the main board.

(2) Remove the three screws C attaching the DVD mecha-

nism assembly.

, CN301

CN300

CN302

CN301

C

Fig.3

(No.MB515)1-9

3.1.3 Removing the front panel assembly
(See Fig.4 to 7)

(1) Disconnect the connector wires from connector CN103

the transformer board. (See Fig.4)

(2) Disconnect the card wires from connector CN303

and CN307 of the main board. (See Fig.5)

(3) Disconnect the connector wire from connector CN140

the amplifier board. (See Fig.6)

(4) Remove the two screws D attaching the front panel assem-

bly from bottom side of main body. (See Fig.7)

(5) Remove the one screw E attaching the front panel assem-

bly from left side of main body. (See Fig.4)

(6) Remove the one screw F attaching the front panel assem-

bly from right side of main body. (See Fig.5)

(7) Remove the one screw G attaching the earth wire from

switch board to main board. (See Fig.5)

(8) Disengage the hook a and hook b of the both side of the

front panel and then take out the front panel assembly.
(See Fig.4, 5)

3.1.4 Removing the center chassis
(See Fig.1, 5)

(1) Disconnect the connector wire from connector CN330

the main board. (See Fig. 5)

(2) Remove the one screw H attaching the center chassis.

(See Fig. 5)

(3) Remove the two screws J attaching the center chassis.

(See Fig. 1)

, CN306

of

of

of

H

F

CN307

CN306

CN313

b

CN303

CN330

G

Fig.5

CN335

CN309

CN312

CN314

d

CN311

3.1.5 Removing the tuner pack
(See Fig.1, 5)

(1) Disconnect the card wire from connector CN335

main board. (See Fig. 5)

(2) Remove the two screws K attaching the tuner pack. (See

Fig.1)

of the

CN103

E

CN140

Fig.6

c a

1-10 (No.MB515)

Fig.4

D

Fig.7

3.1.6 Removing the rear panel

(See Fig.1, 4, 5, 8 and 9)

(1) Disconnect the parallel wire from connector CN210

sub woofer jack board. (See Fig.8)

(2) Remove the one screw L attaching the rear cover. (See

Fig. 1)

(3) Remove the twelve screws M attaching the rear panel.

(See Fig. 9)

(4) Disengage the hook c and hook d of the rear panel and

then take out the rear panel. (See Fig.4, 5)

of the

CN210

Fig.8

3.1.7 Removing the main board

(See Fig. 5)

(1) Disconnect the card wire from connector CN312

and CN314 of the main board.

(2) Disengage the connector CN309 and CN311 connect to

primary board and main board and then take out the main
board to upward.

, CN313

MMMM

Fig.9

(No.MB515)1-11

3.1.8 Removing the primary board
(See Fig. 10)

(1) Disconnect the connector wire from connector CN119

the transformer board.

(2) Remove the one screw N attaching the primary board.

3.1.9 Removing the heat sink
(See Fig. 11)

(1) Remove the five screws P attaching the heat sink.

of

CN119

N

Fig.10

3.1.10 Removing the regulator board
(See Fig. 12)

(1) Disconnect the connector CN160

and regulator board.

P

Fig.11

connect to primary board

1-12 (No.MB515)

CN160

Fig.12

3.1.11 Removing the cassette mechanism assembly

(See Fig.13)

(1) Remove the six screws Q attaching the cassette mecha-

nism assembly.

3.1.12 Removing the switch board

(See Fig.14)

(1) Take out the volume knob.
(2) Remove the twelve screws R attaching the switch board.

Q

Q

Fig.13

R

3.1.13 Removing the FL board

(See Fig.15)

(1) Remove the four screws S attaching the FL board.
(2) Remove the two screws T attaching the open/close switch

board.

R

Fig.14

SS

T

Fig.15

(No.MB515)1-13

3.2 DVD mechanism

3.2.1 Removing the traverse mechanism
(See Fig.1 to 6)

(1) Remove the two screws A attaching the tramecha holder

from top side of DVD mechanism assembly. (See Fig.1)

(2) Remove the two screws B attaching the DVD module

board. (See Fig.2)

(3) Remove the four screws C attaching the CB holder and

take out it. (See Fig.3)

(4) Remove the four screws D attaching the traverse mecha-

nism. (See Fig.4)
(5) Solder the solder part of DVD pick up. (See Fig.5)
(6) Disconnect the card wire from CN101

DVD module board. (See Fig. 6)

Caution:

• Solder the short land section on the DVD pickup before dis-

connecting the card wire from the connector on the DVD
pickup. If the card wire is disconnected without attaching sol­ders, the pickup may be destroyed by static electricity.

• When attaching the DVD pickup, be sure to remove solders

from the short land section after connecting the card wire to
the connector on the DVD pickup.

and CN201 on the

A

Clamper base

B

A

DVD mechanism assembly

Fig.1

DVD mechanism assembly

B

1-14 (No.MB515)

DVD module board

Fig.2

DVD module board

Solder short land section

Fig.5

C

C

CC

Fig.3

DVD mechanism assembly

Traverse mechanism assembly

DVD module board

CN101

CN201

Fig.6

DD

Fig.4

(No.MB515)1-15

3.2.2 Removing the pickup assembly
(See Fig.7 to 11)

(1) Remove the two rod springs pressing the guide shaft. (See

Fig.7)

(2) Remove the screw E and F attaching the spring holder.

(See Fig.8)

(3) Remove the read screw from traverse mechanism assem-

bly. (See Fig.9)

Caution:

When remove the lead screw, do not loss the middle

gear. (See Fig.10 and 11)
(4) Remove the bar spring pressing the shaft. (See Fig.10)
(5) Take out the pickup assembly from traverse mechanism

chassis by order. (See Fig.11)

(SHAFT)

(T.TABLE)

HOOK

(BAR SPRING)

Fig.10

ROD SPRING ROD SPRING

Fig.7

Spring holder

Fig.8

order 2

order 3

order 1

Fig.11

EF

Middle gear

1-16 (No.MB515)

Lead screw

Fig.9

3.2.3 Removing the feed motor assembly
(See Fig.12)

(1) Remove the one screw G attaching the feed motor assem-

bly.

(2) Remove the feed motor wires from solder part of spindle

motor board.

Splder part

3.2.4 Removing the spindle motor assembly
(See Fig.13)

(1) Remove the two screws H attaching the spindle motor from

spindle motor board.

Middle gear

Lead screw

Fig.12

H

Spindle motor

Fig.13

G

(No.MB515)1-17

3.2.5 Removing the tray assembly
(See Fig.14 & 15)

(1) Remove the two screws J attaching the clamper base.

(See Fig.14)

(2) Remove the one screw K attaching the shaft guide from

bottom side. (See Fig.14)

(3) Remove the two screws L attaching the shaft guide from

top side. (See Fig.15)

Caution:

When attach the tray assembly, boss of loading sub assembly
should attach to guide of bottom side at tray assembly. (See
Fig.15)

J

order 1

order 2

clamper base

L

K

Fig.15

[bottom side]

Fig.14

1-18 (No.MB515)

SECTION 4

ADJUSTMENT

4.1 ATTENTION IN SERVICE OF DVD SECTION

(1) When pickup, Flash ROM ,DVD module board were changed, initialize EEPROM by all means.
(2) When full initialization was excuted, excute learning with a DVD test disc by all means.

Test disc : VT-501, VT-502
Learning method : It is adjusted automatically by normal playback of a DVD disc.

4.2 TEST MODE

In DVD test mode, initialization processing, the version of a microcomputer, a front end check, JITTA, and a laser current value
are indicated.

Step Operation Function Remarks

1 The AC code is pulled

out, The STOP and
PLAY key of a main unit
are pushed simultaneously.

The AC code is inserted

2 Version display

with the state of 1.

Push the PAUSE key of a

1

main unit.
NORMAL initialization

Push the STOP+POWER+

2

10 key of a remote control
for a long time.
FULL initialization

Push the STOP+POWER+

3

9 key of remote control.

It is made POWER ON in test
mode, and VERSION is displayed
on FL.

* segment of FL is RDS on at the
time of the completion of
initialization.

* segment of FL is COLT START
on at the time of the completion
of initialization.

Display the version of a micom
on FL.

FL display

12345678

TEST J C #

TJC#

TJC#

aa . cc

bbb

__ _

DVD

_

ee ee

.

dd 5sec

**

**

**

temporary
5sec

temporary

The version code is as the
following.
0x01: JC 0x02: 1U 0x03: D
0x04: E 0x05: 2U 0x06: 3U
0x07: UB 0x08: UT 0x09: 4U
0x0a: UY 0x0b: EE 0x0c: UF

Region code display
0x00: 0(Free) 0x01: 1 0x02: 2
0x04: 3 0x08: 4 0x10: 5 0x20: 6
0x40: 7 0x80: 8
"X" is indicated at the time as the
one except for the above.
The study state and an
initialization state from a back
end are displayed on the 10th
and 11th figure of FL display.
0xFF : Blank display
The study state(The 10th figure)
0x03: DVD Study un-completing,
CD Study un-completing. ("3")
0x02: DVD Study completing,
CD Study un-completing. ("2")
0x01: DVD Study un-completing,
CD Study completing. ("1")
0x00: DVD Study completing,
CD Study completing. ("0")
The initialization state
(The 11th figure)
0x03: FULL initialization end
("3")
0x00: NORMAL initialization end
("0")
0xFF: Initialization un-ending.
("Blank")

aa: Reserve(blank),
bbb: syscom version, ->017
cc: syscom model->_1/_3/51
dd:syscom destination

->U1/U2/U3/U4/EE
eeee: DVD backend version

->0271
syscon destination->U1:US/A
U2:UN U3:UG/UX
U4:UW/UY EE:EE

(No.MB515)1-19

Step Operation Function Remarks

4 Push the MENU key of

remote control.

5 Push the MENU key of

remote control.

Push 1 key (of 10KEY) of

1

remote control.

Switch on the all-points light of
FL and LED.

Display the check mode of a
frontend on FL.

Starting of DISC & normal play
(Play from the started position)

FL display

12345678

HE KCC

HE KCC

Push 2 key (of 10KEY) of

2

remote control.

Push 3 key (of 10KEY) of

3

remote control.

Push 4 key (of 10KEY) of

4

remote control.

Push 5 key (of 10KEY) of

5

remote control.

Push 6 key (of 10KEY) of

6

remote control.

Push 7 key (of 10KEY) of

7

remote control.

Push 8 key (of 10KEY) of

8

remote control.

Push 9 key (of 10KEY) of

9

remote control.

Push 10 key (of 10KEY) of

10

remote control.

Push 0 key (of 10KEY) of

11

remote control.

Push +10 key (of 10KEY)

12

of remote control.

Push STOP key (of 10KEY)

13

of remote control.

Push OPEN/CLOSE key

14

(of 10KEY) of remote control.

Push PLAY key (of 10KEY)

15

of remote control.

Push the MENU key of

6

remote control.

Push the POWER key of
a main unit.

Existence of WOBBLE
0: WOBBLE_NO_CHECK
(Un-checking.)
1: WOBBLE_PRESS_MEDIA
(Press)
2: WOBBLE_MINUS_MEDIA
(DVD-R/-RW Media)
3: WOBBLE_PLUS_MEDIA
(DVD+R/+RW Media)

With no assignment

CD_LD lighting & laser current
display

DVD_LD lighting & laser current
display

DVD_SL x 1 JITTA measurement
mode

The contents of a backup memory
(0x00-0x46) display (BWD)

The contents of a backup memory
(0x00-0x46) display (FWD)

Temperature sensor value
(AD value) display

DVD-DL (Parallel , opposite),
DVD-SL
Search & JITTA measurement to
a predetermined position

MONITOR output change
1: SRV_MONI_CIRC
2: SRV_MONI_SERVO
3-5: SRV_MONI_ANALOG
6-7: SRV_MONI_DRC
8-11: SRV_MONI_SERVO_JIG
12: SRV_MONI_DEFAULT

Initialization of the contents of a
backup memory

Disk stop, LD-OFF

Tray open/close

Play disc

Return to STEP2.

Cancel test mode. It cancels, even if it does by all

HE KCC

CHECK

CHECK

*1 Fundamentally ,the mode carries out a toggle by pushing the MENU key.

********

********

********

********

********

********

********

********

********

********

********

Arg2-3: 0
Arg4-5: WOBBLE detection result

Arg2-3: Laser current value
(a BACKUP value, actual
measurement)
Arg4-5: 0

Arg2-3: Laser current value
(a BACKUP value, actual
measurement)
Arg4-5: 0

Arg2-3: Laser current value
(a BACKUP value, actual
measurement)
Arg4-5: actual measurement

Arg2-3: Backup memory address
(0x00-0x46)
Arg4-5: The contents of a backup
memory

Arg2-3: Backup memory address
(0x00-0x46)
Arg4-5: The contents of a backup
memory

Arg2-3: 0
Arg4-5: Temperature sensor value

Arg2-3: 0x00-0x06
(The measurement position in
VT501)
Arg4-5: JITTA value

Arg2-3: 0x00-0x0C
Arg4-5: 0

Arg2-3: Laser current value
(a BACKUP value, actual
measurement)
Arg4-5: JITTA value

STEP.

1-20 (No.MB515)

SECTION 5

TROUBLESHOOTING

This service manual does not describe TROUBLESHOOTING.

(No.MB515)1-21

Victor Company of Japan, Limited
Audio/Video Systems Category 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan

(No.MB515)

Printed in Japan

VPT