Videocon Mstar MST719, Mstar MST719DU, Руководство по обслуживанию

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MST719 Service Manual
4
1. Introduction chassis block diagram
MST719 chassis is composed of power management,Tuning circuit, IF Amplifier circuit, TDA9885 is the IF-PLL demodulators,
CVBS and Sound decode,video processing circuit. The MST719DU is the main IC combines the functions of 2D comb filter Decode
and 2De-Interlacing ,µ-controller. ADC and Scaling . Integration one HDMI. TAS5707 is the sound processor and Sound amplifier.
The block diagram as follow:
24C04
HDCP
DVD socket
PI5V330
DVD socket
U19
CVBS
YPbPr
YP
b
P
r
CV
BS
_
O
u
t
CV
BS
CV
BS
Y / C
A
u
di
o R
&
L
Audio R&L
Audio Out AMP
HDMI DAC
CS4344
DV
D R&L
A
u
di
o out
Audio R&L Out
TV Audio
IF
NXP
LCD Panel
Con
n
e
c
t LI
P
S
Power
IR
LED
KEY Board
IR Board
Speaker
2D interlace
2D Combfilter
MSTAR IC
U26
U14
U10
U20
U21
U16
U27
U18
U4
U7 U8
U9
U6
U13
24C32
FLASH
EN25F40
EEPROM
CN21
R
C
455
8
AV2&AV_OUT
Tuner
S-Video YPbPr&AV1
HDMI
VGA
V
G
A_
Au
id
o
H
e
a
dph
one
_
O
u
t
U28
SN74LVC1GX04DCK
X2
X1
CN8
CN10
BG/DK
PAL/SECAM
VGA_AI HP
processor&AMP
Sound
Audio switch
DVD switch
Audio switch
K9656M30
74HC4052D 74HC4052D
MST719DU
K3953M30
CVSB
TDA9885TS
ADC
PCM1808
TAS5707
24C04
2 X 5W
24C04