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8. Alignments
Not applicable.
9. Circuit Descriptions, List of Abbreviations, and IC Data Sheets
Index of this chapter:
1. Introduction
2. Loader
3. Mono Board
4. Abbreviations
5. IC Data
Notes:
•
For a good understanding of the following circuit
descriptions, please also check the diagrams in chapter 6
and 7.
9.1
Introduction
The DVD-SD5.31 is the fifth generation DVD Standard Design
Module (ATAPI based) from Philips Video Systems.
The SD5.31 module consists of:
•
Tohei TD_S202 Slot-in loader
•
ALi M5705/SP3721 front-end processor
•
ATAPI bus interconnection between front-end and back-
end
•
LSI Logic ZiVA-5 back-end DVD decoder / host processor
•
Front-end (engine) and back-end software.
9.2
Loader
The Tohei slot-in loader has an optical unit consisting of two
lasers, one for CD with a wavelength of 780 nm, and one for
DVD with a wavelength of 650 nm. The SP3721A front-end
chip (item 7002) controls the data from these lasers, and the
supply to them.
When the user slots in a disc, the block diagram below shows,
how the disc will be detected and pulled in. The +12VSTDBY
source is always present in order to keep the optocoupler
circuit functioning. Upon detection of the incoming disc, the
Front Panel will be interrupted and a "Power wake-up" signal is
send to turn on the Power module to the DVD module. The disc
will then be pulled in and reading begins (actual circuit may
differ slightly from this).
Alignments
SD-5.31SL
+3 V3
+5 VStby
1103
org
1
red
2
light br
+3V3
3
1102
Disc Eject Led
yellow
1
green
2
blue
3
Disc In Led
black
4
Figure 9-1 Loader sensor
9.3
Mono Board
FRONT-END
Laser
Drivers
EDO-DRAM
512 kB
BACK-END
SDRAM
16 MB
Audio
Figure 9-2 SD5.31 Block diagram.
9.3.1
Front-end: the Servo Part
The front-end consists of:
•
The Loader Interface.
•
DVD Front-End Processor.
•
Program Memory.
8.
EN 47
+3V3_stby
+5V_stby
7200
Disc Eject Sensor
44
(OUTSW)
Disc In Sensor
40
( Slot-In-Detect )
ALI
+5 VStby
Disc Down sw
( In Sw )
45
49
47
GPIO_STBY
GPIO_OPEN
CL 36532043_005.eps
150503
Loader
Motor
Loader Interface
Drivers
ALI
FLASH
(Front-End
2 Mb
processor)
ATAPI
ZIVA
FLASH
(Back-End
2 Mb
processor)
Video
Others
Module Interface
CL 36532043_001.eps
conn 1800
pin3
050603
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