Overall Block
Key Components
The unit is made up of: the Power Supply, the
Front Panel, the Basic Engine, the Digital Board,
the Analog Board, and the Digital Input/Output
Board. Refer to Figure 15.
Block Diagram Descriptions
Power Supply
The Power Supply is a SMPS using Hot Ground
on the primary side of the transformer. There is
no MAINS power switch. It is operating when AC
is applied. It supplies power to: the Analog
Board, the Digital Board, and the Basic Engine.
Front Panel Display
This module contains a microcomputer that dou-
bles as a fluorescent display driver. It receives
the IR inputs and the keyboard inputs. It commu-
nicates the user input from the Keyboard and IR
Receiver via the I
2
C Bus to the Microcomputer
on the Analog Board.
Basic Engine (BE)
This consists of the Mechanism and Servo con-
trol PCB. The Mechanism is essentially the same
as a DVD with the exception of the Optical
Pickup Unit, OPU. The OPU has a duel direction
signal path, one for the write signal and one for
the play signal. The OPU has three ICs mounted
on it for processing laser signals. These include:
the Laser Drive IC or LADIC, the Dvd
Recordable Optical Preprocessor IC or DROPPI,
and the Non Volital RAM or NVRAM to store its
electro-mechanical settings.
The Servo controls the Mechanism. It handles
the HF signal to and from the OPU. It uses a
Microcomputer to control all aspects of the Servo
operation. This includes: tray operation, spindle
speed, focus, HF preprocessing, and radial posi-
tioning of the Light Pen.
Digital PCB
This module performs many functions. It inter-
faces between the Basic Engine and the rest of
the unit.
During record, it encodes analog video into a
recordable digital data stream. The Analog to
Digital Converter is in a Video Input Processor,
VIP, that supplies the MPEG2 Encoder. The
Empress is the MPEG2 encoder. It supplies the
data to the VSM, Versatile Stream Manager. The
VSM is the gateway to the BE.
During playback, the MPEG2 Decoder receives
its input directly from the BE. It decodes the data
stream into analog Video. The analog Video is
sent to the Analog Board and Digital Video is
provided to the Line Doubler. The Line Doubler
receives 11 bit digital YUV. The Line Doubler
produces progressive scan digital Y, Cr, Cb that
goes to the Digital to Analog Encoder. D_R,
D_G, and D_B are sent to the Analog Board. The
MPEG2 Decoder sends Digital Audio to the
Analog Board to be processed.
Analog PCB
This module contains all the A/V inputs and out-
puts including a Tuner. There is no RF modula-
tor. The RF output to the TV is merely a Loop-
thru for the Antenna or Cable signals. Source
selection and output type are controlled by a
microcomputer. The microcomputer controls
many functions throughout the unit including:
user input, input/output selection, the Tuner, the
DAC, and ADC functions of the Audio. It also
controls the Fans.
DIVIO PCB
The Digital Input Module provides IEEE 1394
translation to the DVD recorder. It separates the
Digital Video and Audio. The Digital Audio is
decoded and sent as Analog Audio to the Analog
Board. Digital Video (DV) is supplied to the
Video Input Processor on the Digital Board.
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