Specifications

CONSTRUCTION
MPEG card to the audio/video input of TV
via jacks J 7 and J 11 respectively. Use
only shielded wires for these connections.
●
Check to ensure that the step-down
transformer provides 12-0-12 volts at
1 ampere of load, before connecting it
to the
MPEG card. Connect it to the MPEG
card via jack J 1.
●
Switch on the TV to audio/video mode
of operation. Adjust the 100-ohm pre-
set connected at the video output of
MPEG card to mid position.
●
Switch on the MPEG card by switching
on 230 volts main supply to the 12-0-
12 volt transformer.
●
If everything works right, ‘Sony Digital
Technology’ will be displayed on the
television. The
TV screen will display
this for about 5 seconds before going
blank. Adjust the 100-ohm preset for
proper level of video signals.
Step 2. Connections to audio
CD
player after confirmation of proper
functioning of
MPEG card during
step1.
●
Open your audio CD player. Do this very
carefully, avoiding any jerks to the au-
dio
CD player, as these may damage the
player beyond repair.
●
Look for the IC number in Table II (on
page 47) that matches with any
IC in
your audio
CD player.
●
After finding the right IC , note its RF
EF
MIN pin number from the Table I.
●
Follow the PCB track which leads away
form
RF EFM in pin of the IC and find
any solder joint (land) on this
PCB track.
Solder a wire (maximum half meter) to
this solder joint carefully. Other end of
this wire should be joined to
RF jack J 2
of the MPEG card.
Caution: Unplug the soldering iron
form the mains before soldering this
wire because any leakage in the sol-
dering iron may damage the audio
CD
player.
●
Another wire should be joined between
the ground of the audio
CD player and
the ground of jack
J 2 of the MPEG card.
●
This finishes the connection of the MPEG
card to the audio CD player.
Step 3. Playing audio and video
CD s.
●
Switch on the power for the audio CD
player and the MPEG card.
●
Put a video CD in the audio CD player
and press its play button to play the
video
CD .
●
After a few seconds the video picture
recorded on the
CD will appear on the
television.
●
The play, pause, eject, rewind, forward,
track numbers, etc buttons present on
the audio
CD can be used to control the
new video
CD player.
Now your audio
CD player is capable
of playing video
CD s as well. You can con-
nect a power amplifier to the
MPEG card
to get a high-quality stereo sound. The
author tested this project on many audio
players including Thompson Diskman and
Kenwood Diskman. A photograph of one
of the scenes in black and white is in-
cluded as Fig. 2. (Please see its coloured
clipping on cover page.)
No special
PCB is required and hence
the same is not included.
The author has perferred to use Sony
Digital Technology Card (against
KD 680 RF -
35 C of C -Cube Technology) because of many
more functions it provides.
Additional accessibility features of this
card (Sony Digital Technology), as shown
in Table I can be invoked by adding two
push-to-on switches between jack 8(J8) and
ground via 1K resistors (Fig 1). These will
enhance the already mentioned functions
and facilities available on this card, even
though it has not been possible to exploit
the card fully due to non-availability of
technical details. I hope these additions
will help the readers get maximum mile-
age from their efforts.
TABLE I
POSSIBLE EXTRA FUNCTIONS
S1 (mode switch) S2 (function switch)
Slow —
Discview —
Pal/NTSC Pal NTSC
Vol+ Volume Up
Vol- Volume Down
Key+ Left volume down
Key- Right volume down
L/R/CH Left, Right, Mute, Stereo
Play/Pause —
and backward scan facility with 9-view
pictures, slow-motion play, volume and
tone control and
R / L (right/left) vocal.
W
ant to convert your audio com-
pact disk player into video com-
pact disk player. Here is a
simple, economical but efficient add-on cir-
cuit design that converts your audio
CD player to video CD player.
Description
Decoder card. The add-on circuit is
based on
VCD decoder card, KD 680 RF -3Sc,
also known as
MPEG card adopting MPEG -
1 (Motion Picture Expert Group) stan-
dard, the international stan-
dard specification for compress-
ing the moving picture and au-
dio, comprising a
DSP (digital
signal processor)
IC chip, CL 860
from C-cube (Fig. 3). The VCD
decoder card features small
size, high reliability, and low
power consumption (current
about 300ma) and real and gay
colours. This decoder card has
two play modes (Ver. 1.0 and
Ver. 2.0) and also the forward
Note: The above mentioned functions can also be accessed
using remote control.
Fig. 3: Layout diagram of MPEG card from c-cube
CONVERSION OF AUDIO CD PLAYER
TO VIDEO CD PLAYER  II
K.N. GHOSH
15