Sanyo LCD-22XR9DZ, Service Manual

Page: 16 / 43

4
、
PC/YPbPr
signal flow
PC/YPbPr
video signal inputted into main chip
MSD209
to be processed by
modules of “
A/D
transform, digital video process and
OSD
addition”, then
LVDS
signal is outputted to drive
LCD
panel.
PC/YPbPr
audio signal is processed by circuits of “voltage divided,
impedance matching and alternating-current coupling”, then inputted into main
chip
MSD209
directly for acoustic process and volume control, afterwards the
audio signal is inputted into left and right sound tracks of earphone amplifier
BH3547F
directly to be amplified, now the audio signal is divided into two, one is
outputted to earphone jack directly, the other is inputted into audio power
amplifier
TDA7266SA
(
AB
type) to be amplified and then outputted to speakers.
5
、
HDMI
signal flow
HDMI
video signal inputted into main chip
MSD209
to be processed by
modules of “digital video process and
OSD
addition”, then
LVDS
signal is
outputted to drive
LCD
panel.
HDMI
audio signal is decoded into
Dolby AC-3
signal or
MPEG
multi-sound-
track digital audio signal by inner decoder of main chip
MSD209
, then one is
outputted through
SPDIF
directly; after the process of “sub-transform and
DAC
”,
the other is outputted as analog audio signal with double-sound-track (
stereo
),
the analog audio signal is inputted into the rear part of main chip
MSD209
for
acoustic process and volume control, then inputted into left and right sound
tracks of earphone amplifier
BH3547F
respectively to be amplified, now the
audio signal is divided into two, one is outputted to earphone jack directly, the
other is inputted into audio power amplifier
TDA7266SA
(
AB
type) to be
amplified and then outputted to speakers.
6
、
Brief instruction on unit functions
MPEG-2 MP@HL 、 H.264 Main and High profile up to Leve4.0 Decoding
MPEG
、
Dolby Digital
（
AC-3
）、
AAC Digital Audio Decoding
3D comb filter
L
ow consumed power in standby mode
（
≤ 1W
）
Audio power amplifier (AB type) with HI-FI acoustic output
High quality transformation from interleaved scanning to line-by-line scanning
Realizing real integrative functions
- build integration
- integrative TUNER
（
integrating analog with digital
）
- integrative searching-program function
- integrative OSD interface
Main parts of the unit
：
22
inch
CPT LCD panel
（
1366X768
）
Main chip ： MStar MSD209FG-LF
Demodulating chip
：
Intel CE6353
TUNER
：
N
utune
FQD1116ME/IV
DDR ： SAMSUNG K4T51163QC-HCF7
Audio power amplifier (AB type)
：
ST TDA7266SA