Kenwood KVT-910DVD Service Manual page 43

6) The pixel data forwarded to the Video Encoder is converted to composite and RGB signals of NTSO or
PAL formalt and transmitted to the liquid crystal panel and image output circuit.
The audio data (SDATA, LRCLK, BCLK, Audio CLK) forwarded to Audio DAC is converted to 2-
channel L-R signal and output form RCA connector.
2-2 Movements at the time of Replaying CD
1) The DVD mechanism forwards the data read from the CD to MPEG Decoder via the CD-DA interface.
2) In CD mode, the MPEG Decorder will be in the bypass mode and forwards the input data to Audio DAC
without doing any thing to it.
3) The Audio data (SDATA, LRCLK, BCLK, Audio CLK) forwarded to the Audio DAC is converted to 2-
channel L-R signal and output from the RCA connector.
At the same time, the input audio data is converted to SPDIF by the DIT (Digital Interface Transmitter),
which is built into Audio DAC, and is output to MPEG Decoder.
The SPDIF data input by the MPEG Decoder is, again, output from the MPEG Decoder at the same
time as playbacking of the DVD, without being worked on.
M_SDATA
M_BCLK
M_LRCLK
PLL
384fs
TC9246F
2-3 CPU peripheral circuit movement
The CPU conducts control over the DVD Video System as a whole. The program is stored in the flash
memory and the DRAM is used as the program work area. The CPU mainly controls the LSI control such
as MPEG Decoder, Video Encoder, Audio DAC, etc, and the like and also controls communication with
the Host CPU, and DVD Mechanism.
In communication with the Host CPU, simple serial communication is used and communications on
system control commands and DVD and CD related communications such as Playback Control (Remote
Control Code) are conducted.
The communication with DVD mechanisms is conduced by using local interface mainly for disc
information and analysis of playback information instructed by the host CPU on DVD and CD, and for the
communication of DVD mechanism control information.
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KVT-910DVD/920DVD/930DVD/
CIRCUIT DESCRIPTION
L64021
SDATA
BCLK
LRCLK
Audio CLK
Digital Audio DATA
Digital Audio Out
fig.7
940DVD/960DVD
AK4353
Audio
DAC
Optical Output
L ch
R ch
45