Akai A-211 Скачать руководство пользователя страница 16

4.3 SMPS

6 Pin, Data Connector Pin Assignments

PIN

1

2

3

4
5

6

NAME

REM

DATA

CLK

STB

GND

VCC

I/O

I

I

O

O

O

DESCRIPTION
Front Panel Data input

IR sensor interrupt

Front Panel chip select

Front Panel clock
Front Panel Data output

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.

4.2.1 Front Panel Interface

15

DVD Service Manual

Содержание A-211

Страница 1: ...SERVICE MANUAL Model A 1211 www akai ru DVD PLAYER...

Страница 2: ...ESCRITPIONS 4 1 DVD MPEG board 4 2 Front Panel 4 3 SMPS 4 4 DVD Driver 5 1 SWPS TRANSFORMER 5 2 SWPS CONTROLLER IC TEA1523P 5 3 SWPS PROGAMMABLE SHUNT RE GULATOR FAIRCHILD TL 431 5 4 LINE FILTER 2 x 2...

Страница 3: ...2 BLOCK DIAGRAM CABLE CONNECTIONS...

Страница 4: ...2 3 4 L1 FB1 CE14 470u 10V CE9 10u 50V CE8 100u 25V CE7 10u 50V CE11 220u 25V CE3 470u 10V CE6 100u 50V CE10 1000u 25V CE2 22u 50V R10 470 R17 2 2K R21 2 2K R18 680 R19 1K R15 22 R11 2 2k R9 470 R7 6...

Страница 5: ...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 effec...

Страница 6: ......

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Страница 13: ......

Страница 14: ......

Страница 15: ...l A 1 2 3 4 5 6 A B C D 6 5 4 3 2 1 D C B A Title Number Revision Size B Date 26 Jun 2004 Sheet of File Drawn By R2 10K R3 10K R1 10K E1 220U 10V 6 5 4 3 2 1 1 2 S1 1 2 S2 1 2 S3 R GND 5V REMOTE REM 5...

Страница 16: ...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 t...

Страница 17: ...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 Turnove...

Страница 18: ...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 The insulation re...

Страница 19: ...5 3 SWPS CONTROLLER IC TEP1523A...

Страница 20: ...5 3 SWPS CONTROLLER IC TEP1523A...

Страница 21: ...namic 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 Features Description...

Страница 22: ...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 L 1 2 L 3 4 100 20 uH NOTES ELECTRICAL DATA CIRCUIT DIAGRAM LEAKAGE INDUCTANCE 1 4 2 3 5 5 LINE FILTE...

Страница 23: ...nector CHECK Voltages Present REPLACE Ip02 FUSE CHECK MPEG BOARD CHECK MPEG BOARD REPLACE CONNECT CABLE REPLACE POWER PCB YES YES NO NO OK NO OK Voltages Present FUSE Dp02 REPLACE 6 1 POWER SUPPLY 6 F...

Страница 24: ...O PICTURE NO FRONT PANEL DISP POWER BOARD CHECK CHECK REPLACE MAINBOARD CN VOLTAGE IR 5V RECEIVER Cn4 PIN2 RC PRESS NO NO SIGNAL YES SIGNAL DATA PRESS ANY KEY ON RC AND OBSERVE OPEN CLOSE ON RC MPEG2...

Страница 25: ...URE NO AUDIO POWER BOARD CHECK INSERT A CD FOR AUDIO TEST AND PRESS PLAY REPLACE MPEG BOARD CHECK JP4 CHECK CN6 LOADER AUDIO OUTPUT RUNING J3 RGB CVBS RUNING NO NO NO NO YES YES VOLTAGE 5V 12V 6 3 MPE...

Страница 26: ...3 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 B...

Страница 27: ...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 Fi...

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