Pioneer DVR-7000 Service Manual page 24

DVR-7000
3.2.3 Main Newly Developed Features
3.2.3.1 Pickup
In addition to DVD-R/RW recording and DVD-ROM playback, the
newly developed pickup can play back CD media. The laser diodes
are provided separately for DVD and CD, but one lens is used for
both.
Fig. 3 Pickup
3.2.3.2 LSI for Process of Recording Signals
The conventional structure of 3 chips and a discrete circuit has been
integrated into 2 chips, realizing performance stabilization and cost
reduction.
Fig. 4 A2-Chip R3-Chip
3.2.3.3 Video Decoder LSI
A video decoder LSI for high-quality conversion of analog video
signals to digital signals has been newly developed. By mounting a
10-bit/27-MHz video ADC, higher accuracy and better stabilized
reproduction of luminance and color have been realized.
RECORDER DRIVE
MAIN
IC109 PM0025AF
RECORDER DRIVE
MAIN
IC602 PE5131A
Fig. 5 George
3.2.3.4 MPEG Video Encoder LSI
A new MPEG video encoder LSI, which enables recording in 3/4-
D1 and 2/3-D1 resolutions in addition to conventional full-D1 and
1/2-D1 resolutions available with the conventional MPEG-2
encoders, has been developed. This offers more options of resolutions
suited to length of recording, and enables higher picture quality even
with longer recording. It also reduces load on the host CPU by
substituting multiplexed processing of video and audio data for it,
and contributes to cost reduction by assuming the DV codec function.
3.2.3.5 Graphics Engine LSI
An LSI for graphics processing, such as full-resolution GUI and the
reduced-size-moving-picture-capture function, has been newly
developed for easier operation and an easy-to-understand user
interface. This can dramatically improve UI expression. This LSI
also has high-quality picture features, such as frame TBC (Time
Base Corrector) and 3DNR (Digital Noise Reduction).
Fig. 4 Vaikilt
3.2.3.6 Drive Interface LSI
Conventionally, SCSI was employed as a drive interface, and was
controlled by a dedicated LSI and CPU. Transfer of data was
managed by the host CPU.
Now, ATAPI has been employed as the drive interface, and a new
LSI has been developed. By transferring management of data transfer
to the LSI, drive-control functions have been converged to the LSI,
thus reducing load on the host CPU and contributing to cost
reduction.
MAIN Assy
IC8008 PD0272A
MAIN Assy
IC4006 PD6342A
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