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DVD PLAYER
Model:
A1211
SERVICE MANUAL
www.akai.ru
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1. CONTENTS
Title Page
1. CONTERTS 1
2. BLOCK DIAGRAM (CABLE CONNECTIONS) 2
3. POWER SUPPLY 3
4. FUNCTIONAL DESCRITPIONS 4
4.1 DVD MPEG board 4
4.2 Front Panel 14
4.3 SMPS 15
4.4 DVD Driver 16
5. DESCRIPTION OF THE INTEGRATED 18
CIRCUITS
5.1 SWPS TRANSFORMER 18
5.2 SWPS CONTROLLER IC (TEA1523P) 19
5.3 SWPS PROGAMMABLE SHUNT RE 21
GULATOR (FAIRCHILD TL 431)
5.4 LINE FILTER(2 x 25mH) 22
6. FAULT TRACING FLOW CHART 23
6.1 POWER SUPPLY 23
6.2 FRONT PANEL 24
6.3 MPEG BOARD 25
7. COMPONENT LIST 26
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2. BLOCK DIAGRAM (CABLE CONNECTIONS)
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1 2 3 4
C6 C7 D4
NC FR102 CE3 R9
470u/10V 470
F2
IN4007 2.2n/AC400V T1
D 1 11 R10 R11 D
C10 470 2.2k 3.8V/0.2A
470p/1KV
F1 JP2
IN4007
R2
47K
RT1 10 F1
D5 FR102 L3 20uH D9 1
NTC10D-11 9.1V F2
12 2
-21V
3
CE4
C2 IN4007 CE6 CE7 -21V 0.1A 4
100u/50V 10u/50V C13 D5V
0.22/275VAC 5 14 5
0.1u/50V
47u/400V
C5
10n/630V
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D1 13 L4 CE9
HER157 D6
IN4007 FR102 20uH
3. POWER SUPPLY
4 L1 3 CE2 10u/50V -12V
C3
C4
22u/50V
HGND 14 100mA
C14
471/275VAC
CE8 C15
8 16 470p/1KV 0.1u/50V
471/275VAC
2 1 100u/25V
R1233 D2 ER102
C1 D7
0.22/275v 15 L5 CE11
HER207
C 9 20uH 220u/25V C
+12V1.2A
VR1 18
S07K275 IC1 FB1 R14
FUSE
104 C24 C17 CE10 1K
15 C18
1 8 471/1KV 1000u/25V 0.1u/50V
VCC DRAN
R5
T630mA220VAC
2 7 D8 L6
GND NC 75K SB360
R7 6.8K 20uH
3 6 D5V
RC SOURCE
C16 680P CE14 1.8A
SW1 4 5 C19 Jp4
REG AUX 470u/10V
102/1KV -12V
R15 1
R8 2.2K R4 R16 2
0.47 22 CE13 270 +12V
2200u/10V 3
CN1 TEA1523 4
D5V
220VAC D5V 5
C23104P 6
HGND HGND
2
1
B C20 C21 B
0.1u/50V 0.1u/50V
CE15
4.7K IC2 10u/25V R33
R6
R18 330
680 R17
PC817 R19 2.2K
1K
C22
R20
1K
104/50V
IC3
TL431C R21 Title
A 2.2K A
Size Number Revision
A4 V1.1
Date: Sheet of 1/1
File: Drawn By
:
1 2 3 4
DVD Service Manual
DVD Service Manual
4. FUNCTIONAL DESCRIPTIONS
4.1 DVD MPEG board
4M FLASH SERIAL
EPROM
CVBS
R
G
B
AUD2
16M SPCA8200A 2- Cntr/LFE
AUD1
CHANNEL Rear L/R
SDRAM AUD0 AUDIO Rear L/R
CODEC
DVD-DSP CD-DSP SPDIF
I/F I/F
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
4
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A.
1 2 3 4 5 6
The front panel I/O.
4.2 Front Panel
D D
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6 5V
5
4 REM
3 CLK
2 STB
1 DATA
C S1 C
1 2
S2
1 2
S3
1 2
REMOTE
R
5V
GND
REM DATA CLK STB
B B
E1
220U/10V
R1 R2 R3
10K 10K 10K
5V
DVD Service Manual
A A
Title
Size Number Revision
B
Date: 26-Jun-2004 Sheet of
File: Drawn By:
1 2 3 4 5 6
1
4
DVD Service Manual
4.2.1 Front Panel Interface
6 Pin, Data Connector Pin Assignments
PIN NAME I/O DESCRIPTION
1 DATA I Front Panel Data input
2 STB O IR sensor interrupt
3 CLK O Front Panel chip select
4 REM I Front Panel clock
5 GND O Front Panel Data output
6 VCC
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.
1
5
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4.3.1 Adopt small l ens: can adopt SONY310 act lens