Jvc MX-DK51 Service Manual

SERVICE MANUAL

COMPACT COMPONENT SYSTEM

MB54720066

MX-DK51EE,MX-DK51A,MX-DK51US,

MX-DK51UX,MX-DK51UG,MX-DK51UN

SP-MXDK51C

CA-MXDK51

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

TABLE OF CONTENTS

1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

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

SP-MXDK51F SP-MXDK51WSP-MXDK51FSP-MXDK51S SP-MXDK51S

COPYRIGHT © 2006 Victor Company of Japan, Limited

No.MB547

2006/6

SPECIFICATION

Amplifier section Output Power FRONT SPEAKERS 100 W per channel, min. RMS, driven into 6 Ω at 1 kHz with

no more than 10% total harmonic distortion.

CENTER SPEAKER 50 W per channel, min. RMS, driven into 6 Ω at 1 kHz with

no more than 10% total harmonic distortion.

SURROUND SPEAKERS 50 W per channel, min. RMS, driven into 6 Ω at 1 kHz with

no more than 10% total harmonic distortion.

SUBWOOFER 100 W per channel, min. RMS, driven into 6 Ω at 63 Hz

with no more than 10% total harmonic distortion.

Audio input sensitivity/
Impedance*

VIDEO OUT Color system NTSC/PAL selectable

Speaker Terminals 6 Ω - 16 Ω (Front speakers)

Tuner section FM tuning range 87.50 MHz - 108.00 MHz

AM (MW) tuning range 531 kHz - 1 710 kHz (at 9 kHz)

For Saudi Arabia only 530 kHz - 1 600 kHz (at 10 kHz)

For Russia only 522 kHz - 1 629 kHz

Disc player section Playable disc DVD Video/DVD Audio/CD/VCD/SVCD

Dynamic range 90 dB

Horizontal resolution 500 lines

Wow and flutter Immeasurable

Cassette deck section Frequency response Normal (type I) 50 Hz - 14 000 Hz

Wow and flutter 0.15% (WRMS)

General Power requirement AC 110 V / AC 127 V / AC 220 V / AC 230 V - AC 240 V ,

Power consumption 225 W (at operation)

Dimensions (approx.) 265 mm × 335 mm × 370 mm (W/H/D)

Mass (approx.) 8.4 kg

AUX 400 mV/47 kΩ
MIC 1/2 3.0 mV/50 kΩ

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
(Interlace/Progressive)

(Y) : 1 V(p-p)/75 Ω
(PB/PR) : 0.7 V(p-p)/75 Ω

6 Ω - 16 Ω (Center speaker)
6 Ω - 16 Ω (Surround speakers)
6 Ω - 16 Ω (Subwoofer)

530 kHz - 1 710 kHz (at 10 kHz)

CD-R/-RW/-ROM (CD/VCD/SVCD/MP3/WMA/MPEG-1/
MPEG-2/ASF/JPEG/DivX format)
DVD-R/-RW (DVD Video/DVD Video Recording (VR)/
MP3/WMA/MPEG-1/MPEG-2/ASF/JPEG/DivX format)
+R/+RW (DVD Video format)

(adjustable with the voltage selector), 50 Hz / 60 Hz

22 W (on standby)

*Measured at 1 kHz, with tape recording signal 400 mV

Design and specifications are subject to change without notice.

1-2 (No.MB547)

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.MB547)1-3

1.5 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

1-4 (No.MB547)

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

Please refer to "MX-DK5 (No.MB523)" about this section.

SECTION 3

DISASSEMBLY

Please refer to "MX-DK5 (No.MB523)" about this section.

SECTION 4

ADJUSTMENT

Please refer to "MX-DK5 (No.MB523)" about this section.

SECTION 5

TROUBLESHOOTING

Please refer to "MX-DK5 (No.MB523)" about this section.

(No.MB547)1-5

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

(No.MB547)

Printed in Japan

VPT

PARTS LIST

MX-DK51EE,MX-DK51A,MX-DK51US

MX-DK51UX,MX-DK51UG,MX-DK51UN

* All printed circuit boards and its assemblies are not available as service parts.

No.MB547

- Contents -

Exploded view of general assembly and parts list (Block No.M1)

DVD mechanism assembly and parts list (Block No.MJ)

DVD loading base assembly and parts list (Block No.MN)
Electrical parts list (Block No.01~07)
Packing materials and accessories parts list (Block No.M3)

3- 2
3- 6
3- 8
3-10
3-22

3-1

Exploded view of general assembly and parts list

8

47

B

67

Block No.

M

M

1

M

68

15

14

32

7

69

FL board

A

k

68

Switch board

71

79

o

70

72

7

7

p

78

2

6

4

1

30

12

m

3

s

r

25

24

28

5

C

18

n

s

28

3-2

19

10

30

E

r

28

26

21

48

24

25

17

23

9

13

16

22

20

11

31

33

80

51

2

B

b

32

g

34

j

h

81

35

82

55

66

62

64

58

65

59

53

57

52

t

41

29

8

D

C

39

Surround board

Regulator &
amprifier board

75

36

56

61

38

37

e

f

27

F103

87

77

Transformer board

a

k

q

85

F101

86

F102

F104

88

A

E

F001

F003

74

84

49

83

50

40

42

44

73

m

a

t

Bracket board

d

c

Primary board

43

16

76

D

f

e

o

p

q

Main board

b

54

g

h

j

89

d

c

n

46

45

3-3

General Assembly

Block No. [M][1][M][M]



Symbol No. Part No. Part Name Description Local

1 GV10328-015A FRONT PANEL ASSY DK51EE,DK51US,DK51UX,DK51UG,DK51UN
1 GV10328-016A FRONT PANEL ASSY DK51A
2 GV30871-001A POWER BUTTON
3 GV30872-001A EJECT BUTTON
4 GV30873-003A BUTTON A
5 GV30874-007A BUTTON B
6 GV20418-002A FUNCTION BUTTON
7 QYSDSF2608ZA TAP SCREW M2.6 x 8mm(x6)
8 QYSDSF2608ZA TAP SCREW M2.6 x 8mm(x12)
9 GV10319-008A FRONT LENS
10 GV30875-005A VOLUME KNOB
11 GV30894-002A V.ORNAMENT ASSY
12 QYSDSF2608ZA TAP SCREW M2.6 x 8mm(x2)
13 GV40083-004A MIC.KNOB DK51EE,DK51US,DK51UX,DK51UG,DK51UN
14 GV30878-002A TRAY FITTING
15 GV40706-003A FL FILTER
16 GV40246-003A FOOT SPACER (x4)
17 QAL0789-001 ALPS MECHA
18 QUQU12-0706AJ-E FFC WIRE 7pin 6cm
19 GV10321-002A CASS.HOLDER(L)
20 GV10322-002A CASS.HOLDER(R)
21 GV40694-001A DOOR SPRING(L)
22 GV40695-001A DOOR SPRING(R)
23 GV40220-001A LACH (x2)
24 GV40034-001A DAMPER ASSY. (x2)
25 VKY4180-401 CASSETTE SPRING (x4)
26 GV30883-001A PCB BRACKET
27 QYSDSG2606EA TAP SCREW M2.6 x 6mm(x2)
28 QYSBSF3010ZA TAP SCREW M3 x 10mm(x6)
29 GV10320-001A CENTER CHASSIS
30 QYSSSF3010ZA TAP SCREW M3 x 10mm(x2)
31 QYSBSF3010ZA TAP SCREW M3 x 10mm(x3)
32 LV30225-011A SPACER (x2)
33 GV30349-047A SPACER
34 GV30349-067A SPACER
35 QYSBSF3035ZA TAP SCREW M3 x 35mm(x2)
36 GV30882-003A HEAT SINK
37 QYSBSG3016EA TAP SCREW M3 x 16mm(x2)
38 GV40488-001A LEAF SPRING
39 QYSBSG3016EA TAP SCREW M3 x 16mm(x2)
40 QYSBSG3016EA TAP SCREW M3 x 16mm(x2)
41 QYSBSG3010EA TAP SCREW M3 x 10mm
42 QYSBSG3010EA TAP SCREW M3 x 10mm
43 GV10323-001A BOTTOM CHASSIS
44 QYSBSGG3008EA TAP SCREW M3 x 8mm
45 QYSBSGG3008EA TAP SCREW M3 x 8mm
46 QYSBSF3010ZA TAP SCREW M3 x 10mm
47 GV10217-007A/S/ METAL COVER
48 QYSBSG3010ZA TAP SCREW M3 x 10mm(x2)
49 QYSDSTL4008EA TAP SCREW M4 x 8mm(x4)



50 QZW0033-001 STRAIN RELIEF
51 GV10324-015A REAR PANEL DK51EE
51 GV10324-017A REAR PANEL DK51A
51 GV10324-014A REAR PANEL DK51US,DK51UN
51 GV10324-016A REAR PANEL DK51UX,DK51UG
52 GV10325-001A REAR COVER
53 QYSBSGY3008EA TAP SCREW M3 x 8mm
54 QAU0412-001 TUNER
55 QYSBSGY3008EA TAP SCREW M3 x 8mm(x2)
56 QYSBSGY3008EA TAP SCREW M3 x 8mm(x4)
57 QYSBSGY3008EA TAP SCREW M3 x 8mm DK51EE,DK51US,DK51UX,DK51UG,DK51UN
58 QYSBSGY3008EA TAP SCREW M3 x 8mm(x2)
59 QYSBSGY3008EA TAP SCREW M3 x 8mm
61 QYSBSGY3008EA TAP SCREW M3 x 8mm
62 QYSBSGY3008EA TAP SCREW M3 x 8mm(x2)
64 QYSBSGY3008EA TAP SCREW M3 x 8mm(x2)
65 QYSBSGY3008EA TAP SCREW M3 x 8mm(x2)
66 QYSBSGY3008EA TAP SCREW M3 x 8mm(x2)
67 QYSBSGY3008EA TAP SCREW M3 x 8mm(x6)
68 QYSDSG3006NA TAP SCREW M3 x 6mm(x2)
69 GV30880-001A FL HOLDER A
70 GV30891-001A FL HOLDER B
71 GV30349-048A SPACER (x2)
72 GV40411-001A LED HOLDER

3-4



Symbol No. Part No. Part Name Description Local



73 QMPK200-200-JD POWER CORD(EU) 2m BLACK DK51EE,DK51US,DK51UX,DK51UG,DK51UN



73 QMPG150-244-JC POWER CORD(AST) 2.44m BLACK DK51A



74 QQT0506-001 POWER TRANSF T1
75 QAR0405-001 FAN
76 QUQU12-1116AJ-E FFC WIRE 11pin 16cm
77 QUQU12-1911AJ-E FFC WIRE 19pin 11cm
78 QUQU12-1915BJ-E FFC WIRE 19pin 15cm
79 QUQU12-0915BJ-E FFC WIRE 9pin 15cm
80 QUR110-2522AJ-E FFC WIRE
81 QUR110-1518AJ-E FFC WIRE
82 QUR110-0530BJ-E FFC WIRE



83 QMF51W2-5R0-J8 FUSE F001 5A AC250V



84 QMF51W2-2R5-J8 FUSE F003 2.5A AC250V



85 QMF51W2-6R3-J8 FUSE F101 6.3A AC250V



86 QMF51W2-6R3-J8 FUSE F102 6.3A AC250V



87 QMF51W2-2R0-J8 FUSE F103 2A AC250V



88 QMF51W2-3R15-J8 FUSE F104 3.15A AC250V
89 GV30349-048A SPACER

3-5

DVD mechanism assembly and parts list

Block No.

M

J

M

M

Grease

=JVG-31N
=JVS-1003
=1401C

< Back side >

29

28

25

31

24

FXL-D10-1M

31

30

26

27

31

20

23

30

31

22

18

15

21

16

17

14

10

7.0mm

2

+

0.2mm

-

7

6

9

3

3

1

11

12

13

8

5

4

The parts without symbol number are not service.

3-6

DVD mechanism



Symbol No. Part No. Part Name Description Local

1 LV22234-001A TM.CHASSIS
2 LV22235-001A SPINDLE BASE
3 QYSDST2005ZA TAP SCREW M2 x 5mm(x2)
4 LV36555-001A G.S.HOLDER
5 QYSDST2005ZA TAP SCREW M2 x 5mm
6 LV44041-002A GUIDE SHAFT
7 LV44479-001A BAR SPRING
8 LV22236-001A FEED HOLDER
9 QAR0165-001 FEED MOTOR
10 LV30225-0X5A SPACER
11 LV36557-001A F.M.GEAR
12 QYSPSPT2030MA SCREW M2 x 3mm
13 QYSDST2005ZA TAP SCREW M2 x 5mm
14 QAL0786-002 P.UP
15 LV22237-001A RACK ARM
16 LV36560-001A RACK ARM SPRING
17 QYSPSFU1740ZA TAP SCREW M1.7 x 4mm(x2)
18 QUQK05-2415AC-E FFC WIRE 24pin 15cm
20 LV44041-002A GUIDE SHAFT
21 LV36559-001A L.S.GEAR
22 LV41517-003A LEAD SCREW
23 LV36558-001A MIDDLE GEAR
24 LV36556-001A SPRING HOLDER
25 LV44623-001A COMP.SPRING
26 QYSDST2005ZA TAP SCREW M2 x 5mm
27 QYSDST2616MA TAP SCREW M2.6 x 16mm
28 QAR0386-001 S.MOTOR
29 QYSPSPU1775ZA SCREW M1.7 x 7.5mm(x3)
30 LV44042-001A ROD SPRING (x2)
31 LV44046-001A ADJUST SCREW (x4)

Block No. [M][J][M][M]

3-7

DVD loading base assembly and parts list

Grease

JVS-1003
JVG-450

20

19

18

16

h

FMU-MB4-21M

27

14

M

N

M

Block No.

M

2

3

13

15

h

< Back side >

25

24

16

17

j

1

10

11

9

0.10mm

4

7

8

6

7.75mm

Backside

26

5

j

A

B

26

DVD module board

25

25

25

c

12

DVD loading switch board

g

e

f

3-8

23

22

23

A

22

B

k

d

22

21

f

c

23

d

e

The parts without symbol number are not service.

DVD loading base



Symbol No. Part No. Part Name Description Local

1 LV11065-004A LOADER SUB ASSY
2 E407140-001SS C.D ROLLER
3 E407149-001SS RUBBER TUBE
4 LV10979-002A TRAY
5 LV35499-001A SHAFT GUIDE
6 LV44022-001A SHAFT
7 QYSSSF2008ZA TAP SCREW M2 x 8mm
8 QYSDSF2008ZA TAP SCREW M2 x 8mm(x2)
9 QAR0197-001 MOTOR
9 or QAR0280-001 LOADING MOTOR
10 LV43844-002A MOTOR PULLEY
11 QYSPSPU1730ZA SCREW M1.7 x 3mm(x2)
12 QYSDSF2008ZA TAP SCREW M2 x 8mm
13 LV43974-001A BELT
14 LV21852-003A CLAMPER BASE
15 QYSDSF2008ZA TAP SCREW M2 x 8mm(x2)
16 LV41741-004A SPECIAL SCREW
17 LV35056-002A DVD CLAMPER
18 LV42930-003A P.C.MAGNET
18 or LV41118-003A MAGNET
19 LV43848-001A YOKE
20 LE40906-002A SPECIAL SCREW
21 ----------------- SINGLE DVD TRAM
22 LV44043-001A INSULATOR (x4)
23 LV44044-001A SPECIAL SCREW (x4)
24 LV11212-002A CB HOLDER
25 QYSBSF2608ZA TAP SCREW M2.6 x 8mm(x4)
26 LV44209-001A WASHER SCREW (x2)
27 LV44603-001A LASER CATION

Block No. [M][N][M][M]

3-9