Tatung V23CLTT, Руководство по обслуживанию

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24
B. CV (Y Pb Pr )
：
Entering from P50 signal, then enters Pin#43
、
48
、
54 of AD9883-110 passed by
the matching impedance resister and capacitance. It converts to RGB signal of
YUV by I006 and passes to Port B of I019 by six row-resister RP08 ~ RP12.
Then output to panel.
C. Audio
：
The rest of Audio source all connect Audio Processor ( I044
：
MSP3440 ) to
each left and right voice channels. Controlled by MCU (I012) and selected
through I044, just output one source to Audio Power Amp (I010
：
LA4232) to
Speaker.
(3) MCU
Microcontroller
Refer to circuit diagrams Sheet 5 of 11.
The microcontroller I012 (SyncMOS SM59246) or Topro TP2808 is running with the
clock based on 14.318 MHz by X003.
C127 and R096 constitute a reset circuit. It properly the necessary active high reset
signal for I012 (Microcontroller) to operator properly. This reset signal is result that is
fed into I012 (Pin#10) to provide the necessary system reset for the proper operation
of I012.
The signal IR- DAT (Pin#15 of I012) is used for Infrared Receiver. If the IR Received
some signal
，
I012 will send interrupt signal by Pin #2
、
3 (MSDA
、
MSCL) to control
any chip.
The signal designated AD0 ~ AD7 (Pin36 ~ 43 of I012) are data signal used for
transferring data between I012 and I019.
The signal TXD and RXD ( Pin#13
、
11 of I012 ) are used for debugging during
firmware.
I013 (24LC16B) provides necessary non-volatile storage for system operating
variables and parameters. It is controlled by I012 via MSDA and MSCL signal, witch
pulled-up to +5V voltage with R092 and R093 (10K
Ω).
(4) Panel interface
Refer to circuit diagrams Sheet 6 of PWB-0610.
The signals of panel interface are all from I019 to the LCD Panel.
The signal FPVCC (Pin#96 of I019) and MMTB3904 (Q003) control the +5V power
to the LCD Panel.
The signals FPBACK and DVD0 (Pin#95
、
62 of I019 ) are used for the control of
backlight’s On / Off state and Panel luminance.
The signals SHFCLK
、
PDE
、
PVYSNC
、
PHSYC come from Pin#90 ~ 94 of I019, and
then fed into P005. These four signals are used for panel image display controls.