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No Fragments Archive 10: Diskmags
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LEDGERS
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LEDG_13.MSA
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CIRCUITS.SKY
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DECODER.DOC
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1985-11-20
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5KB
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105 lines
Slasher of 'SPECIAL FX' brings you
***********************************
* *
* SKY BUSTER *
* *
***********************************
Or ever wondered how to get an everlasting decoder card?.
You do!? Well read on and see how it's done!!
Right the following notes and circuits detail how to modify the SKY external
decoder to disable the re-programming part of the circuit, thus stopping the
" ZAPPING " of the card that makes it invalid. It should be NOTED that this
modification will probably also stop the card from being updated ( should they
ever in their infinite wisdom decide to give us some! ) thus stopping you from
enjoying another WoW!!! Hold me back! super comedy channel or summatt of that
ilk!
Well I'mm sorry to say that at this moment in time I can't even garantee
that the modification actually works ( because our Electronics Wiz is rippin
my decoder apart even as I type this out. I have been assured by a bit of a
Boffin ( who just happened to be Technical Manager of Amstrad Tee! Hee!) that
it does work and I sensed a little bit of bitterness in his voice as he spoke
of his time with Mr Sugar's Empire. So in theory if you have a valid SKY Movies
Plus or Movie/Sport channels card then it should stop valid just as long as SKY
don't issue a whole set of new cards to subscribers or issue an unknown command
to the decoder.
Study the Circuit Diagram 1,( which you'll find on the desktop SKY_CIR1.PI2 )
this shows what you have to do to disable the re-programming part of the
decoder. It involves isolating pins 38, 37, 36, and 35 of the 8252
microprocessor and connecting a zenner diode from J108 to earth/GND. You also
need to solder together a number of components you lift clear of the board and
then connect a new 5 volt feed to them.
Start by taking apart the decoder, turn the front towards you and look at the
bottom left hand side, near to the power supply heat sink. You should then be
able to locate the components shown in the diagram. You first need to lift clear
RP15, DP24, DP25 and DP27 ; RP15 is a resistor, the rest are diodes. You can
either cut the components clear automatically isolates the required pins of the
8252 I.C.
If you decide to de-solder the components then you will need to remove the
main P.C.B. ( Printed Circuit Board ..Ok! MENTOR? ) from the case. This is done
by removing all the screws, about eight in all, then lifting the board clear of
the case. You will also need to remove the earthing screen from under the board
by simply de-soldering the two wires holding it in place.
Next, solder together the lifted ends of the components and connect the
positive side of an IN4001 diode; the other side of the diode is taken to
+5 volt supply at J130. The IN4001 helps protect the 5v line as this connects to
most of the decoders I.C.'s.
The next part of the modification involves connecting a 15 volt zenner diode
from J108 to earth. The current flowing into the zenner needs to be limited, so
you need to replace link J108 with a 1 Watt 47 resistor. This does have the
effect of cooling down the diode, but you will need a fairly large zenner, try
a metal can 10 Watt type. If you can't get hold of a 15 volt diode, you could
fit a 16 volt zenner instead but don't use anything higher than 16 volts. The
negative end of the zenner connects to ground and a convenient point is link
J120. That's it all you need to do now is put together your decoder and check if
it still works. ( and I will MENTOR OK!? )
Disclaimer
~~~~~~~~~
Please NOTE that the details given in this document are for reference and
experimentation only ( Honest Guv! ) and by the way guys you could probably be
breakin the 'Lilly' LAW ( see the postcard for that one JAM )if you watch any
subscription channel, including Filmnet, RTL etc, without first paying the
correct fees. You do this modification at your own risk, and no way can We,Me,
Us, Aunty Flo, Uncle Tom, Cousin Billy or John Major (well perhaps Hmmmn!) be
held responsible for the failure of any decoder or card.
The other PI2 Pictures that accompany this document ( try CIRCUIT.SKY folder )
show the modification for the SKY decoder; NOTE Circuit 2 is for the internal
This modification was supplied by someone who has had this modification done
himself ( support your Local Technical Dept of Amstrad folks! ) who used a 05
card for months without paying any subscriptions. ( SKY_CIR2.PI2 )
If you can't get hold of high Wattage zenner diodes then you could use Circuit
Diagram 3 once again you'll find it in the folder as SKY_CIR3.PI2
Ok! before I end this for God's sake don't mess about with the decoder if you
don't own it ( I mean if you only rent the equipment ) or you could end up
watching free Movies in one of H. M. P's retirement homes ( Prison you prawn!)
Right that's it
I'm outta here
happy viewing.
FROM
' SPECIAL FX '
members who are JAM...ACID...SPIDERMAN...ALCHEMY...MENTOR...
and me SLASHER BOG....
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~