Akai A-1211 Service Manual

DVD PLAYER

Model:

A1211

SERVICE MANUAL

www.akai.ru

1. CONTENTS

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Title

1. CONTERTS

2. BLOCK DIAGRAM (CABLE CONNECTIONS)

3. POWER SUPPLY

4. FUNCTIONAL DESCRITPIONS

4.1 DVD MPEG board

4.2 Front Panel

4.3 SMPS

4.4 DVD Driver

5. DESCRIPTION OF THE INTEGRATED
CIRCUITS

5.1 SWPS TRANSFORMER

5.2 SWPS CONTROLLER IC (TEA1523P)

Page

1

2

3

4

4

14

15

16

18

18

19

5.3 SWPS PROGAMMABLE SHUNT RE
GULATOR (FAIRCHILD TL 431)

5.4 LINE FILTER(2 x 25mH)

6. FAULT TRACING FLOW CHART

6.1 POWER SUPPLY

6.2 FRONT PANEL

6.3 MPEG BOARD

7. COMPONENT LIST

21

22

23

23

24

25

26

１

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2. BLOCK DIAGRAM (CABLE CONNECTIONS)

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3. POWER SUPPLY

D

12345

JP2

F2F1-21V

4321

3.8V/0.2A

F2

R11

2.2k

R9

470

R10

470

D5V

0.1A

F1

-21V

D9

9.1V

C13

0.1u/50V

C

12345

Jp4

-12V

+12V

D5V

1.8A

1.2A

-12V

100mA

C15

0.1u/50V

R14

1K

+12V

C18

0.1u/50V

CE11

220u/25V

R16

B

6

D5V

D5V

270

C21

C20

A

1/1

V1.1

Number RevisionSize

A4

Title

0.1u/50V

0.1u/50V

Date: Sheet of

File: Drawn By:

CE9

10u/50V

CE7

10u/50V

L4

CE3

470u/10V

D4

FR102

T1

NC

C7

C6

20uH

L3

C10

470p/1KV

FR102

D5

11

12

10

1

47K
R2

2.2n/AC400V

IN4007

4

IN4007

RT1

NTC10D-11

D

20uH

D6

FR102

CE6

100u/50V

13

14
5

D1

HER157

10n/630V

C5

CE2

22u/50V

47u/400V

CE

IN4007

IN4007

C4

C3

34

L1

C2

0.22/275VAC

L5

20uH

CE10

1000u/25V

CE8

100u/25V

D7

HER207

C17

471/1KV

C14

470p/1KV

15

18

15

16

14

8

9

FB1

ER102

D2

HGND

471/275VAC

IC1

R1233

471/275VAC

12

C24

104

0.22/275v

C1

VR1

S07K275

FUSE

C

L6

20uH

D8

SB360

R5

75K

6NC7

8

DRAN

SOURCE

VCC1GND2RC3REG

6.8K

R7

T630mA220VAC

CE14

CE13

2200u/10V

470u/10V

R17

2.2K

R15

22

C19

102/1KV

R4

5

AUX

4

R8

C16 680P

SW1

HGND

0.47

TEA1523

104P

2.2K
C23

HGND

1
2

CN1

220VAC

B

330

R33

CE15

10u/25V

IC2

4.7K

R6

C22

R18

R20

680

R19

1K

PC817

R21

2.2K

104/50V

1K

IC3

TL431C

1 2 3 4

A

３

4. FUNCTIONAL DESCRIPTIONS

4.1 DVD MPEG board

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4M FLASH

SERIAL
EPROM

CVBS
R
G

B

16M
SDRAM

SPCA8200A

AUD2

AUD1

AUD0

2­CHANNEL
AUDIO

Cntr/LFE
Rear L/R
Rear L/R

CODEC

DVD-DSP
I/F

CD-DSP
I/F

SPDIF

This board implements the back-end circuitry of a DVD player. It is composed of the following
subsystems:

* Microcontroller which does main control to all other sub-blocks of the system including user
interface, driver interface, audio/video output.
* Vaddis A/V Decoder IC decodes the bitstream coming from the DVD front-end drive, and
Optionally performs audio and video effects.
* Audio Codec

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７

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８

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　９

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１０

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１１

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１２

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4.2 Front Panel

The front panel I/O.

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A.

B

R3

STB

CLK

DATA

5V

GND

R

REM

10K

R2

10K

R1

10K

5V

E1

220U/10V

CLK

STB

DATA

1

C

S3

1 2S11 2S21 2

REMOTE

D

654321

5V

REM

65432

A

Number RevisionSize

B

Title

Date: 26-Jun-2004 Sheetof

File: DrawnBy:

1 2 3 4 5 6

D

C

B

A

１４

4.2.1 Front Panel Interface

6 Pin, Data Connector Pin Assignments

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PIN

1
2
3
4
5
6

NAME
DATA
STB
CLK
REM
GND
VCC

I/O
I

O
O

I
O

DESCRIPTION
Front Panel Data input

IR sensor interrupt
Front Panel chip select

Front Panel clock
Front Panel Data output

4.3 SMPS

The mains power(220VAC) fed from N1 is filtered through C1, L1, C2 and L2 then rectified by D1, D2, D3 and D4
and generates an output at 300VDC. This 300VDC fed to T1 (pin2, pin4) which connects to TEA1523P(pin2), then
TEA1523P will automatically generate a 50KHz square waveform, this 50KHz square waveform controls the
ON/OFF between TEA1523P pin2 and the ground. In normal condition, T1 primary (between pin2 and pin4) will
create a 50KHz square waveform which is controlled by TEA1523P, this signal then fed to T1 and generates 2
different potential voltages of 12V and 5V between pin17, pin14 and pin16, pin14 respectively. The 12VDC and
5VDC then rectified by D7, D8, D9 and then filtered by L3, L4, L5, C9, C10 and C11. The feedback voltage is
controlled by Ic3 TL431 and IC2 PC817. When the output voltage is higher than 5V, the voltage at TL431(2.5V) is
compared with R10 and send out a signal to 5L0380R, the output square waveform then will change to adjust the
output voltage, this acts as a voltage stabilizer.

１５

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4.3.1 Adopt small lens: £ºcan adopt

4.4

4.4.1 Drive cell:adopt RF-300CA-11450 electricity machine

Electric specification

SONY310 .

act lens

4.2 Electricity machine work voltage is 3V-5.9V

4.3 General work voltage is 3.3V-5V

4.4 Unilateralism(com or go) move time:<1.5S(add 5V voltage)

4.5 In 5 C-10 C work current is <120mA

4.5 Testing condition

5.1 Position: level placed

5.2 environment: temperature 22+2 C
Humidity 50+5%

5.3 Turnover storehouse voltage:5V+0.5V

5.4 Standard DVD lens testing frock

5.5 Standard DVD testing dish

１６

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5. DESCRIPTION OF THE INTEGRATED CIRCUITS

5.1 SMPS TRANSFORMER

1. GENERAL INFORMATION

Main Voltage Operations:

Main Drop-out Voltage:

Mains STart-up Voltage:

Operating Frequency:

2. ELECTRICAL CHARACTERISTICS

2.1 STATIC CHARACTERISTICS

WINDING

Primary Inductance

1. Primary Leakage inductance (Pin 2-4) L1.5mH

2.2 WITHSTANDING VOLTAGE

The transformer shall sithstanding a voltage of 4 Kvms for 1 minute and 1 mA between
primary and seconday winding and also 2 Kvms for 1 minute and 1 mA between primary
winding with core and secondary winding with core.

PIN. NO
2-4

90Vac - 265 Vac

Max. 90 Vac

Max. 90 Vac

60 KHz

INDUCTANCE

1.5mH 10%

DESCRIPTION
<0.50W

2.3 INSULATION RESISTANCE

The insulation resistance shall be ore than 500M between primary and seconday
windings when the applied voltage 300 Vdc for 1 minute

2.4 ELECTRICAL CHARACTERISTICS

1. Before taking measurement Pp01 will be to give 5.0Vdc on 5.0Vdc line at Minimum
setting of controls and a mains voltage 220 Vac.

2. Before taking a measurement, DVD set should be working at least 5 minutes on
Normal condition

１８

5.3 SWPS CONTROLLER IC (TEP1523A)

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１９

5.3 SWPS CONTROLLER IC (TEP1523A)

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２０

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5.4 SMPS PROGRAMMABLE SHUNT REGULATOR
(FAIRCHILD TL 431)

Features

* Programmable output voltage to 36volts
* Low dynamic output impedance 0.20 typical
* Sink current capability of 1.0 to 100mA
* Equivalent full-range temperature
coefficient

of 50 ppm ℃　typical

* Temperature compensated for operation
over full rated operating temperature range
* Low output noise voltage
* Fast turn-on response

TO-92

１

1. Ref 2. Arode 3. Cathode

REFERENCE

Description

The TL 431/TL 431A are three-terminal
adjustable regulator series with a guaranteed
thermal stability over applicable temperature
ranges. The output voltage may be set to any
value between VREF (approximately 2.5
volts) and 36 volts with two external resistors.
These devices have a gypical dynamic
output impedanceof 2.0W Active oupput
circuity provides a very sharp turn-on
characteristic making these devices excel
lent replacement for zener diodes in many
applications

CATHODE

REFERENCE(R)

Absolute maximum ratings

Parameter
Cathode voltage
Cathode current Range (Continuous)
Reference Input Current Range
Power dissipation

D,Z Sffix Package
N Suffix Package

Operating Temperature Range
Storage Temperature Range

Recommended Operating conditions

Parameter
Cathode voltage
Cathode Current

2.5 Vref

Symbol
VKA
IKA
IREF

PD

TOPR
TSTG

Symbol
VKA
IKA

ANODE
CATHODE(K)

ANODE(A)

Value
37

-100 ~ +150

0.05 ~ +10

770
1000

-25 ~ +85

-65 ~ +150

Value ValueValue

- 36VREF

- 1001.0

Unit
V
MAI
MA

MW
MW

℃
℃

Unit
V
MA

２１

5.5 LINE FILTER (2 X 25mH)

ELECTRICAL DATA

Inductance: L1-2=L3-4-30mH - 15% - +20%
Resistance: R 1-2 = R 3-4 = 1.0 ohm (max)
Rated current: Irms = 0.50 A
(F= 1 Khz V= 1 Vms)

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CIRCUIT DIAGRAM

1 4

LEAKAGE INDUCTANCE

L 1-2 = L 3-4 100+/- 20%uH NOTES

2 3

２２

6. FAULT TRACING FLOW CHART

6.1 POWER SUPPLY

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NO PICTURE

CHECK

MPEG BOARD

Voltages Present?

YES

CHECK
MPEG BOARD

YES

REPLACE
CONNECT
CABLE

CHECK JP4

Connector

Voltages Present?

NO

NO

CHECK

FUSE

OK

Dp02

REPLACE Ip02,

OK

REPLACE

POWER PCB

NO

REPLACE

FUSE

２３

6.2 FRONT PANEL

NO PICTURE

NO FRONT
PANEL DISP

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CHECK

CN VOLTAGE

YES

MAINBOARD

Cn4 PIN2: RC

DATA

PRESS ANY KEY

ON RC AND

OBSERVE

SIGNAL

PRESS

"OPEN/CLOSE"

ON RC

(5V)

NO

NO SIGNAL

POWER
BOARD
CHECK

REPLACE

IR

RECEIVER

REPLACE

MPEG2

MAINBOARD

２４

6.3 MPEG BOARD

NO PICTURE NO AUDIO

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CHECK

JP4

VOLTAGE(5V,12V)?

YES

LOADER

RUNING?

YES

J3(RGB&CVBS
RUNING?)

NO

NO

NO

POWER
BOARD
CHECK

REPLACE
MPEG
BOARD

NO

INSERT A CD FOR

AUDIO TEST AND

PRESS PLAY

CHECK CN6

AUDIO OUTPUT

２５

7. COMPONENT LIST

ＣＡＢＬＥ

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ＳＷＰＳ

ＰＯＳ　ＮＯ ＴＥＬＲＡ　ＣＯＤＥ ＤＥＳＣＲＩＰＴＩＯＮ

C1 104K M 275V~X2 335 5 MKP

C2 104K M 275V~X2 335 5 MKP

C3

C4

C5

C6

C7 Cap.,50V 473,10%

C8

C9 Ceramic Cap.,63v 104,10%

CA1

CE4 Elec. Cap.,400V-47UF,M,18X27mm

CE2 Elec. Cap.,50V-22UF,M,5X11.5mm

CE6 Elec. Cap.,35V-220UF,M,8X11.5mm

CE11 Elec. Cap.,35V-220UF,M,8X11.5mm

CE10

CE13 Elec. Cap.,10V-2200UF,M,10X20mm

CE14 Elec. Cap.,16V-220UF,M,6.3X11mm

CE15 Elec. Cap.,10V-100UF,M,5X11mm

BR1 Rectifier Diode,1N4007,DO-41

BR2 Rectifier Diode,1N4007,DO-41

BR3 Rectifier Diode,1N4007,DO-41

BR4 Rectifier Diode,1N4007,DO-41

D1 Rectifier Diode,HER105,DO-41

D2 Switch Fr102

D3 Rectifier Diode,FR102,DO-27

D4 Rectifier Diode,FR104,DO-27

D5 Rectifier Diode,FR104,DO-27

D6 Rectifier Diode,FR157,DO-41

D7 Rectifier Diode,SR360,DO-41

D8 Zener Diode,9.1V

FHB FB, 3.5mm*4.7mm*0.8mm

FUSE Fuse,T1AL250V,5*20mm,Glass

IC-1 IC,TEA1523P DIP8

IC-2 IC,PC817B

IC-3 IC,TL431C,TO-92

J-1 Jumper,Diameter=0.6mm,L=10mm

J-2 Jumper,Diameter=0.6mm,L=5mm

J-3 Jumper,Diameter=0.6mm,L=7.5mm

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6Pin,2.0mmPitch to 6Pin,2.0mmPitch VH,180mm,UL2468

26AWG

5Pin,2.0mmPitch to 5Pin,2.0mmPitch PH,150mm,UL2468

26AWG

6Pin,2.54mmPitch to 6Pin,2.54mmPitch VH,250mm,UL2468

26AWG

5Pin,2.54mmPitch,VH to MPEG Power Socket,280mm,UL1007

20AWG

Power Cable,180m,VDE

AV Cable,1.5m

Ceramic Cap.,

Ceramic Cap.,

Ceramic Cap.,1KV 103M 10%

Ceramic Cap.,1KV-101,K

Ceramic

Ceramic Cap.,63V 104,10%

Ceramic Cap.,

Elec. Cap.,25V-1000UF,M,10X20mm

471K M 275V~X1,Y1 335

471K M 275V~X1,Y1 335

222 M 400V~X1,Y1 335

,DO-41

２６

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L-1 Filter,ET20

L-2 Filter,SG01183

L-3

L-4

L-5

Cn1 Conn.,2Pin,VH,3.96mm,S

Cn2 Conn.,2Pin,VH,3.96mm,S

C0N1 Conn.,5Pin,2.54mm,S

CON2 Conn.,6Pin,2.54mm,S

N4 Conn.,4Pin,2.54mm,S

PCB PCB,POW389L

R1 Carbon Film Res.,2W-56K,J

R2 Carbon Film Res.,1/4W-22E,J

R3 Carbon Film Res.,1/4W-330E,J

R4 Carbon Film Res.,1/4W-1K,J

R5 Carbon Film Res.,1/4W-1M,J

R6 Carbon Film Res.,1/4W-10K,J

R7 Carbon Film Res.,1/4W-10K,J

R8 Carbon Film Res.,1/4W-10K,J

R9 Carbon Film Res.,1/4W-1E,J

R10

TR-1 NTC 10D-11

T1 Transformer,KB-464-3089

Radial Choke Inductor,15uH 10%

Radial Choke Inductor,15uH 10%

Radial Choke Inductor,15uH 10%

Carbon Film Res.,1/4W-680E,J

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ＦＲＯＮＴＰＡＮＥＬ

ＰＯＳ　ＮＯ ＴＥＬＲＡ　ＣＯＤＥ ＤＥＳＣＲＩＰＴＩＯＮ

CD1

RD1

RD2

RD3

REM01 Remote Receiver,GPIUM271RK

SW1

SW2

SW3

Elec. Cap.,220uF-10V,5*7mm,CD11,M

Carbon Film Res.,1/8W,10K,J

Carbon Film Res.,1/8W,10K,J

Carbon Film Res.,1/8W,10K,J

Tact Switch,6*6*5mm

Tact Switch,6*6*5mm

Tact Switch,6*6*5mm

２７