EN 191
3139 785 31681
9.
Circuit- and IC description
9.2. Front Board (Panel – D Key)
9.2.1. General
This board consists of the following parts:
•
Frontend (Audio & Video)
•
Keypad registration
9.2.2. Frontend (Audio & Video)
The Frontend connector on AV_Input board[1001] allows for
Audio and Video Connector to connect to Audio
and video sources for recording using the Basic Engine or
HDD.
The Front Left board [1002] and Front Right board[1003]
allows for keypad registration when users depresses
any of the button and the key is sent to Analog board via
Connector 1911 to Microprocessor for controlling the
various function on the recorder.
9.3. Analog
Board
9.3.1. General
The Analog board consists of the following parts:
•
Slave
μ
P
•
Fan Control
•
Simple Power Supply
•
Tuner
Frontend
•
Audio
ADC/DAC
9.3.2.
μ
P (IC 7108 : TMP87PM74AFG)
The
slave
μ
P which run on a 5V supply and is responsible for
the
following
functions:
•
Interface with the Chrysalis chip on the Digital Board via
I
2
C interface, where it functions in the slave-mode
•
Evaluation of the keyboard matrix (network of resistors)
on the Front board via pin 32 and 33.
•
Decoding the remote control commands from the infra-red
receiver on the Front board via pin 22.
•
Activation and control of the FTD display on the Front
board (with the help of 7103 as driver) via I
2
C bus
•
Timer Wake-up activation
•
Fan control via transistors 7103 and 7104
It runs on two clock frequencies namely:
•
8MHz for normal operation
•
32.768KHz for the real time clock
9.3.3. Timer Wake-up activation
During the Standby mode, the slave
μ
P provides a wakeup
call (STBY-line switches to high) to the PSU Board switching
on the Digital Board.
9.3.4. Simple Power Supply
The main power supply for this set is generated in the PSU
board. Within the Analog board only the 5V, 3V3SW and
8VSTBY lines are generated.
Below are the supply lines from the Simple Power supply on
the
Analog
board:
•
3V3SW
to DAC_ADC and CU
•
3V3STBY to
CU
•
5V
to IOV, CU, PROG, MSP, DIGIO and FV
•
5NSTBY
to IOA, PROG, DAC_ADC and Front board
•
5VSTBY
to IOA, IOV, FV, CU, DAC_ADC and Front
Board
•
8VSTBY to
MSP
•
12VSTBY
to CU, IOV, DAC_ADC and Front Board
•
33VSTBY to
FV
•
VGNSTBY to CU and Front Board
Standby
modes:
In Standby mode the STBY control line is low, switching off
the 3V3D, 5VD, 5ND and 12VE supply and thus reducing the
power
consumption.
9.3.5. Tuner Frontend [1700 : TMQZ2-439A]
It has a RF IN for antenna connection and RF OUT which
provides a RF loop through for connection to the TV.
The Frontend ( Tuner & IF-demodulator ) is controlled by
I
2
C (SCL_5V- and SDA_5V-) lines coming from the
μ
P [7108].
Complete video processing is done in this unit and the video
output (CVBS) is taken out from the [VIDOUT] pin 17 via
a transistor [7100] as VFV-line to the Video I/O circuitry. The
audio-IF component SIF1 is taken out from the [SIFOUT]
pin 7 for the demodulation by the Multi-sound processor
(MSP).
9.3.6. Audio
demodulator
The sound demodulation is done by the MSP3415 [7600],
which is also fully controlled via I
2
C bus by the Slave
μ
P. The
audio signals are available at pin 26 and pin 27 and fed as
AFER- & AFEL- line to the audio I/O for further processing.
Содержание DVDR9000H/10
Страница 135: ...EN 135 3139 785 31681 6 Block Diagrams Waveforms Wiring Diagram Waveforms of HDMI Board F111 P H_SYNC F112 P V_SYNC ...
Страница 186: ...EN 186 3139 785 31681 7 Circuit Diagrams and PWB Layouts DTTM Top Component View 123_4406_132_1 pdf 2004 04 28 ...
Страница 187: ...EN 187 3139 785 31681 DTTM Bottom Component View 7 Circuit Diagrams and PWB Layouts 123_4406_132_2 pdf 2004 04 28 ...
Страница 188: ...EN 188 3139 785 31681 7 Circuit Diagrams and PWB Layouts Notes ...
Страница 205: ...EN 205 3139 785 31681 9 Circuit and IC description IC7203 NJM2267M Dual Video 6dB Amplifier BLOCK DIAGRAM Figure 9 14 ...
Страница 209: ...EN 209 3139 785 31681 9 Circuit and IC description IC TMP87PM74ZFG Microprocessor PIN CONFIGURATION Figure 9 18 ...