Akai DVR-4035-VSMC Service Manual

DVD/CD/TUNER/AMPLIFIER

PLAYER

Model:

DVR4035VSMC

SERVICE MANUAL

www.akai.ru

DVD/CD/TUNER/AMPLIFIER PLAYER

DV-R4035VSMC

SERVICE MANUAL

Table of contents

Safety information----------------------------3

1． General guide---------------------------3

2． Low zeta potential leaking inspection------3
3． High zeta potential leaking inspection------3

▲ Device avoiding ES (Electric susceptible)

Influence of ESD (Electric Susceptible

Discharge)----3

▲ Electric specification-------------------4
▲ Mechanical diagram---------------- -------8

Mechanical parts list-------------------- 9

Packing and accessories--------------10

▲

Disassemble and assemble-----------11

▲

1． Take out disc from trouble player-------11

2． PCB position------------------------11

▲ Disassemble and assemble parts of the unit----12

8．Control board silk screen diagrqm--- -----------------------33

▲ Attachment 3------------------------------34

▲ Component list

1． Decoder board component list------------------35
2． Amplifier board component list----------------38
3． Control board component list-------------------41

1． Can open the tray by electricity---------12
2． Can not open the tray by electricity-----12
3． Assemble the case-------------------------12

▲ Attachment 1------------------------- 13
▲ Block diagram/Circuit diagram--------13

1． Block diagram--------------------------------14
2． Connecting diagram-------------------------15
3． Decoder board diagram---------------------16
4． Amplifier board diagram-------------------21
5． Control Board diagram---------------------24

▲ Attachment 2-------------------------25

▲ PCB diagram

1． Upper decoder board PCB diagram----26

2． Upper decoder board silk screen diagram-------27
3． Lower decoder board PCB diagram-------------28
4． Amplifier board PCB diagram-------------------29
5． Amplifier board silk screen diagram------------30
6． Upper control board PCB diagram -------------31
7． Lower control board PCB diagram------------32

2

Safety information

General guide

1.Observe the original circuit during maintenance. If short
circuit occurs, change the over-hot or damaged components.

2.Observe all the protective device after maintenance, such
as whether the shielding cover or paper is assembled well.

3.To avoid electric shock, please inspect electricity leakage
after maintenance
Low zeta potential leaking inspection

1.Take out AC cord and connect a piece of wire between two
legs of the outlet.

2.Use Gear R x 10K of the voltmeter to measure the spares
on AC outlet and exposed metallic part with short circuit.
The resistance between screw cap, control shaft should be
unlimited.

of discharge of distortion（ESD）exceeded the

restrained figure, electric shock should be
possibly suffered. Do maintain the unit and
inspect once more before return to the user.

Device avoiding ES influence of ESD.

Some solid semi-conductor devices are easy to be
damaged by static electricity. These devices are generally
called ES device. The typical devices are IC, field effect
component and semi-conductor laser diode.

The following technology helps to abate the danger of
ESD on body before handle any semi-conductor or
semi-conductor component. Or wear the ESD bangle availed
from the market to eliminate the threate n of static electricity
on human body.

2.Put the electronic parts with ES device on the surface of
conductor such as aluminium foil after take them out in order

Electric leakage inspection

To device with
exposed metal parts

AC voltmeter

0.15

uF

1.5KΩ 10W

Cold water pipe

（connecting to
ground）

to protect static electricity from accumulation and explosion.

3.Solder or disassemble ES device through iron connecting
the earth.

4. Utilize device only anti-static electricity to disassemble
soldering tin. Non-anti static electricity device (ESC
protection) will release ES that damage ES device.

5.Do not use chemical volatile releasing static electricity
that leads to damage ES device

Picture1

High zeta potential leakage inspection
.As illustrated 1, Connect Resistor with 1.5K, 10W and
capacitor 0.15 between exposed metallic part and device of
fine connection to the earth (water pipe etc.).

2.Plug-in AC cord directly to AC outlet. Do not inspect with
shield adaptor.

3.Utilize 1000 or more sensitive voltmeter to measure
alternating voltage.

4.Turn back the AC plug-in from AC outlet then iterate the
inspection as above.

5.Inspect the voltage of the resistor between other exposed
metallic parts and the earth with the same way.

6. The voltage must not be over than 0.75Vrms at any points
on the resistor. Electric leakage should not be over 0.5mA
when processing high voltage leakage testing through
prevent ed static of keenness（ES）setting is exposedto static

6. Unless preparation for pre-assembling has been made,do
not take out the ES device to be changed from the protective
packings( most of the changed ES devices are packed
together with anti-static electrical foam or similar electric
material, besides, countermeasures for down-lead short
circuit are taken.).

7. Protective material should connect the model or the circuit
component to be assembled in it before taking out the
protective material from the ES device.

Note: do not bear electricity to the model or the circuit, and
pay attention to all the other safety information.

8. When disassembling and replacing the ES device, try to
reduce body movement (Or, the movement of legs, the
friction of fibrous of clothes, or elevating the legs from the
floor will generate static electricity ESD, causing damage to
the ES device.)

3

Electric Specification

MW electric index Model No.: DVP-0601-1
Test condition:

1. Supply voltage: AC230V 50Hz 2. Standard power output: 1W

3.Speaker impedance: 4Ω（FL、FR、SL、SR），8Ω（C），6Ω(SW)

4.Standard modulating: 400Hz 30%

No.

1 Intermediate frequency KHz 450 +/-3
2 Cover with area KHz 522-1620 +/-5

4 Utility delicacy

5 S/N ratio（999 KHz，input 5mV/M） dB 40 30
6 Intermediate Frequency restrain rate（612KHz） dB 45 35
7 Mirror restrain rate（1404KHz） dB 35 30
8 Auto plus control（input 100mV/M） dB 30 20

Distortion

9

degree
10 -6dB bandwidth（20dB S/N） KHz 8 5-10
11 zip （input 5mV/M，IFx1 IFx2） % 3 10

Output
12

power

13 +/-10KHz selectivity （1000KHz 20dB S/N） dB 14 8
14 Frequency respond （-6 dB，input 5mV/M） Hz 40~4K 100~3.15K
15 Modulating AC volume （input 100mV/M） dB 40 35
16 The least noise mV 1 3
17 Sensitivity of station locking dB ≤90

5mV/M input，30％ % 1 3
100mV/M input，80％ % 3 5

Vol ume max W
Distortion degree: 10%，60% modulation
degree，input 5mV/M

Test items

S/N 20dB，612KHz uV/M 600 3000
S/N 20dB，999KHz uV/M 600 3000
S/N 20dB，1395KHz uV/M 600 3000

4

Unit Standard Limit error

W 4.5 3

FM electric index Model No.: DVP-0601-1
Test condition:

1. Supply voltage: AC230V 50Hz 2. Standard output power: 1W

3. Antenna impedance: 75Ω 4. Standard modulating: 1KHz 22.5KHz

5. Speaker impedance: 4Ω（FL、FR、SL、SR），8Ω（C），6Ω(SW)

No.

1 Intermediate frequency MHz 10.7 +/-0.1
2 Cover with area MHz 87.5-108 +/-0.1

3 Utility delicacy

4 S/N ratio （98MHz，input 1mV） dB 50 34
5 -3dB limit delicacy uV 10 20
6 Intermediate Frequency Restrain Rate（90MHz） dB 50 45
7 Mirror Restrain Rate（106MHz） dB 28 22
8 Distortion degree （1mV input） % 0.6 1.5

9 Modulating AC volume（input 5mV） dB 50 40
10 Auto frequency control range（1mV input，-3dB） KHz
11 AM restrain（1mv input，modulate degree 30%） dB 32 26

Power output（distortion degree 10%，60KHz，1mv input）

12
13 Frequency response（-3dB） Hz 40~12.5K 100~8K
14 Noise of minimum volume mV 1 3
15 Sensitivity of station locking dB ≤35
16 Passage separating dB 25 ≥20

Test items Unit Standard Limit Error

S/N 30dB，90MHz dB 22 26
S/N 30dB，98MHz dB 22 26
S/N 30dB，106MHz dB 22 26

W 10

5

DVD electric index Model No.: DVP-0601-1

1：Video section

No. Test item Test point Performance require Unit Remark

1

outp

2 S-Video

3

4
5

ut

rang

e

Y、Cr、Cb/Y、Pr、Pb

R、G、B

Horizontal distinguish

Video

Y

Chroma

C

Color

synchronization

6 Bandwidth (+3/-6dB)

7 Differential phase DP

Lum Non-Linear Distortion

8

≤5 %

9 Differential Gain DG

10

11

C

SNR

Y ≥56

U passage ≥50
V passage ≥50

R R passage ≥50

12

G G passage ≥50
B B passage ≥50

2：Audio section (testing signals：TCD-784)

No. Test item

Audio output level

1

Amplitude/Frequency response

2

Test point Performance require

1.8+0.2/-0.8 Vrms DVD(LPCM)、CD

3 S/N ratio

4

Distortion THD

5 Dynamic range

0.02 %

6 Separate degree

Passage imbalance

7

Coaxial output range

8

Optical output wavelength (λp)

9

0.5±20%
660±30

3：Other characteristics

No. Test it em Test point

Performance require

1 Disc reading time

Remote control distance

2

Supply voltage input

3

Consume power

4

Storing temperature -20℃～+55℃

5

Image signal system NTSC/PAL

6

7

Free falling

Disc format

8

230V(－10%/＋10%)

Suitable for request of GB/T2423.8-1995

1）DVD Player： 12cm single face，single layer；12cm single face，double layer；8cm single face ,single

layer；8cm single face，double layer；（2）CD disc：12cm disc，8cm disc.

1.0±0.2

0.7±0.14

0.88±0.176

0.3±0.06

0.7+/-0.14

0.7+/-0.14

≥500 Line

≥5.5

≤2

≤2

±2

≥85

90
65

≤1.5

10～20

≥5

110

Vp-p

Vp-p

Vp-p

Vp-p

Vp-p

Vp-p

MHz

degree

100KHz 0dB

75Ω load
75Ω load

%

dB

dB

dB

dB

dB

dB

75Ω load
75Ω load
75Ω load
75Ω load
75Ω load
75Ω load
75Ω load

Unit Remark

dB

dB

DVD(LPCM)20Hz~20KHz

JIS-A (20KHz LPF)

1KHz JIS-A

dB

dB

dB

Vp-p

nm

1KHz JIS-A
1KHz JIS-A

DVD(LPCM)、CD

75Ω±1% load

Unit Remark

S

m

W

Normal working

50Hz

4：Test condition

1. Environment condition: normal temperature, normal voltage.

2. Supply voltage：AC230V 50Hz。

6

Amplifier board electric index Model No.：DVP-0601-1

No. Test item Unit Typical Limit Test condition

Power supply
1 Voltage input VAC 230±10%
2 Rated output voltage & current +5V 1.3A +5V 1.5A

+12V 150mA +12V 200mA

-12V 50mA -12V 100mA
+22V 3.5A +25V 3.5A
~3.7V 100mA ~3.7V 120mA

-24V 50mA -24V 50mA
3 Output power W 110 Voltage input AC230±10%V
4 +5 wavelength output mV <50
4 Power modulating (+5V point) % 5 Voltage input AC230±10%V
6 Load modulating (+5V point) % 5 Current 10mA-1.5A
7 Standby power W ≤10

Amplifier section
1 Working voltage V +22 +26 Rated load
2 Static current mA 180 300
3 Rated load (FR/FL/SR/SL)
4 Rated load (C/SW)

Rated output power (FR/FL/SR/SL)

5

Maximum output power

6

(FR/FL/SR/SL)
7 Rated output power (C) W 15
8 Maximum output power (C) W ≧20 ≧25
9 Rated output power (SW) W 25

10 Maximum output power (SW) W ≧30 ≧35

Band distortion (FR/FL/SR/SL/C)

11

12 Band distortion (SW) % 0.25 Rated load; PO=1W;f=100Hz
13 Channel output mix dB 55
14 Channel output mix dB 55
15 S/N dB ＞75 JIS-A

Amplitude/Frequency response L/R/C/SL/SR

16

Amplitude/Frequency response SW

17

1 Circuit level output V
2 Circuit S/N rate output dB 90 85
3 Circuit level input V
4 Circuit impedance input Ω 10K±10%

Ω
Ω

W 12.5

W ≧16 ≧18

% 0.25 Rated load; PO=1W;f=1KHz

dB +/-2 +/-3 50Hz~20KHz
dB +/-2 +/-3 20Hz~200Hz

Audio input, output

1.5±20%

RMS

1.5±0.5

RMS

4
8

THD=10% RL=4Ω
Maximum volume RL=4Ω
THD=10% RL=8Ω

Maximum volume RL=8Ω

THD=10% RL=6Ω
Maximum volume RL=6Ω

f=1KHz
f=10KHz

Test condition

1. Test condition：Normal temperature，Normal voltage

2. Supply voltage：AC230V 50Hz。

7

Mechanical diagram

44

44

36

44

38
37

19

45

44

24

22

48

32

48

28

42

3

8

7

9

10

13

11

15

16

4

23

22

25

3

4

31

42

5

14

6

17

45

43

20

43

47

35

43

42

1

42

12

39

41

34

40

26

45

23

25

2

18

47

44

44

46

45

24

30

44

29

21

46

21

45

43

43

43

47

46

21

46

27

45

47

21

45

47

33

8

Mechanical

parts list　

Material No.

No.

Name

Panel(with card reader)

decoration board

Power button
Volume button

Function button(up)
Function button(down)

Lens
Lens-A
Lens-B
Lens-C

Lens-D
Lens-E

Lens-F
Lens-G

Lens-H
Lens-I

Mother board
Back board
Top cover
Top cover holder

PCB holder（hight 7.0mm）
PCB holder（height 11.0mm）

Front feet

Rear feet
Front feet mat

Rear feet mat
Pick up CMS-S71SG6

Power switch PS4E-A-040
Decoder board
Amplifier board

Control board

Card reader board

ALPS tuner TFCF1E800A
Transformer 230V/110W/VDE

bolt H6.0×38.0mm
nut M6×4.8mm
mat φ6.0×13×1.0mm
Spring mat φ6.0×2.0mm

Fix piece for transformer φ65×6.5×1.2mm

rubber mat φ65× 7.0×1.3mm

rubber mat φ80× 7.0×1.3mm

Screw ST3X6KTT
Screw ST3X8PA
Screw ST3×6PWTT
Screw ST3×8PWTT
Screw ST3×12PWTT

Screw ST3×6PTT

Screw ST3×16PTT

Nickel　

Nickel　

Nickel　

Nickel　

Nickel　
Nickel　
Nickel

QTY

Remark

2

Pannel/Mother board

unit feet、loader/mother board

Amplifier board, decoder board/mother board

Mother board/rear board,tuner

Card reader board/mother board

9

Packing and accessories

1.Disassemble

1

2

6

2.Material list

No.

1
2
3

4
5
6

Material No.

A1-060120-11

O7-060120-L0

O7-060120-R1

O7-060160-S2
A3-060120-01

O6-060127-12

4

4

Name

Remote control

Poly foam（left）

Poly foam（right）

Speaker poly foam

SPP-0301-0 type speaker

Gift box (unit+speaker)

QTY

1
1
1
2
1
1

3

5

10

Disassemble and assemble

The unit comprises mechanical and electric part
including:front panel, base panel, top panel,
back panel and loader, AV output board,decoder,etc.

Take out disc from trouble player

If you can not take out disc even press OPEN/CLOSE
key,please pull power cord from the socket and follow
as below:1. Wring 8 screws out then pull left and
right side to take away top panel that rear part is

upper(illustrated

A)

Gear

Graph C Rotate white gear

2.Wring 6 screws out connected base panel with bottom
board then wrest 4 screws connected loader with bottom
board (illustrated B)

Graph A Dispart cabinet

Graph D Take out disc

PCB position

All PCB assemblies locate as illustrated H

card reader board

AV output board

front control board

Graph B Dispart front panel and loader

decoder board

Volume zeta board

3.Take out front panel and loader carefully, there is one
white plastic gear under the loader.Rotate the gear as

illustrated C to stretch DVD tray and door (illustrated D),

you may take disc out carefully.

Graph H PCB boards location

11

Disassemble and assemble parts list

1.Take out top panel
See as illustrated A

2.Take out front panel

Able to open the disc tray by electricity

2.1 Operate after completely take out top panel

2.2 Press OPEN/CLOSE button to open disc tray

Be careful not to damage disc when take it out if it is in the tray.

2.3 Press OPEN/CLOSE button to close tray then pull
out power plug.

Take out PCB board on front panel and cords connected with

2.4

other circuit board.Wring out 5 screws connected front panel and
bottom panel,untie two catches on left and right side of the panel
then take out front panel.(See illustrated E)

catch

catch

catch

catch

Graph E Location of catch on front panel

Unable to open the disc tray by electricity

Unable to open disc tray when press OPEN/CLOSE button

2.1 Take out disc as illustrated A,B,C,D.

2.2 Take out front panel

Assemble the case

Assemble the case by reversing disassembly.

After maintenance,switching on power on the condition
that assembly and connection have no mistake then loader
and electric circuit return to original place automatically.
The unit works normally.

12