Digital Board - Philips DVDR9000H/75 Service Manual

A matrix switch STV6618D [7408] controlled by the Slave
μP via I
C-bus is used for Video I/O switching. All used
2
outputs excluding pin 21 (Y/CVBSOUT-REC) have a 6dB-
amplifi cation and a 75 ohms-driver-stage inside. This IC also
includes several digital outputs, which are used for switching
purposes on the Analog board.
This matrix switch routes the selected inputs to the correct
output lines for TV viewing and further processing in the

Digital board.

The record selector inside the switch selects between the
inputs from Tuner Frontend (VFV), CVBS Scart1 (CVBSIN1),
CVBS Scart2 (CVBSIN2) or D_CVBS from the DENC (on
Digital board). The output signal CVBS_REC together with
the other signals CVBSFIN, YFIN & C_FIN from the Front
and RCB from Scart2 are routed directly to the VIP (on Digital
board) for further processing.
The signals D_CVBS and D_Y are fed through NJM2267M
[7203] (6dB amplifi cation) and D_C via transistors [7410 &
7411] as driver to the rear S-Video output socket and CVBS
cinch socket.
9.4. Basic Engine
The VAD8043 module (also known as D4.3 drive) is dual
format DVD-R/+R and DVD-RW/+RW drive video recorder
with an E-IDE/ATAPI interface.
9.5.1. Record Mode
I2C0
7007
CCIR656
VIP
SAA7118E
CLOCK
7200
1394
PID1394P25
1204
1394
CONNECTOR
Circuit- and IC description
TO / FROM
TO / FROM
D4.3 DRIVE (BE)
HDD
IDE2
7400
CHRYSALIS
PNX7100EH
7812/7813
XIO_1 XIO_0
7807
7201
1394
FLASH
PID1394L40
4M X 16
-5V 3V3 5V 12V
FROM POWER SUPPLY
Figure 9-4 Block Diagram of Chrysalis Board
3139 785 31681
The video recorder engine performs all basic servo tasks.
It reads data from and writes data to the disc and controls
all functions like tray control, start/stop the disc, tracking,
jumping and communicating with the host.
Mechanically, the module consists of a motorized tray
loader that contains the dual laser optical pickup unit and a
PCBA that contains all the electronics needed to control the
drive and interfacing the MPEG encoder/decoder back-end
application.
There is a temperature sensor included in the drive that
prevents malfunction or destruction of the drive in case the
temperature inside the drive gets too high.
9.5. Digital Board
The Digital Board is based on the highly integrated Chrysalis
BGA chip (Ball Grid Array), PNX7100EH and supports 2 IDE
(ATAPI) connection.
The board encodes and multiplexes the analogue video and
digital uncompressed audio (I
MPEG2 stream is formatted for recording by the DVD+RW
engine. In the playback, the board will decode the MPEG2
video into analogue video. In addition, a DV stream can be
received via IEEE 1394 (i-Link), and transformed to MPEG2
format.
7809 7810
I2C
EEPROM
64Kbit
IDE1
I2C 0
I2C 1
SDRAM
4M X 16 x 4
(1) analogue CVBS, YC, RGB/YUV
(2) analogue CVBS, YC, RGB/YUV
9.
S) into an MPEG2 stream. This
2
I2C
EEPROM
64Kbit
1FH VIDEO
(2)
OUT
OPTIONAL
DIG. AUDIO IN
OPT. & COAX
DIG. AUDIO OUT
I2S AUDIO OUT
I2S AUDIO IN
1FH VIDEO IN
EN 195
(1)