I stole this from another forum sat-industry.net,
Original post by Spooky
just place a 270 ohm resistor between pins 1 and 3
I'm not a techy but do you think this would fix the problem of whitey's in the internal slot.. Fixes goldies etc.
Last edited by Decapper; 26-05-08 at 03:12 PM.
Look Here -> |
Here is the whole post, but they figured it better not to cut the circuts.
Also he is the direct post and replies (did not think I could post this so remove if not allowed mods)Dream BoX card reader fix
I have a fix for the dream box card readers
After many images and several card - figured my box was faulty
So i dug out the oscilloscope
And started looking around
Image was 107.2 emu rdgd and I found the after a reset the emu the clock osc went
From 1.5 MHz to 6.3 MHz the clock at 1.5 MHz level was about 3v pp
Now the problem when it changed 6.3 MHz the level dropped
Down to 1 v p-p this works for some sub cards but not any thing else
This is also a problem for some card programmers to
Solution amplify the clock signal
I have only done this mod to the top card slot as it easier to do
The pin out for the top card slot extention is
1 +5v
2 MLR or reset
3 clocks
4 card switch
5 gnd
6
7data I/O
8 card switch
You need to remove the top card socket and cut the track that
Goes from pin 3 of the extender board to pin 3 of the card slot
Solder a wire on the card socket pin 3
Grab a BC548 and solder the emitter to gnd pin 5
collector to the wire from The card socket pin 3 and a 220 ohm which goes to pin 1 +5v
The base is connected to pin 3 on the extender connector
With this mod the 6.3 MHz level came up to 4vpp and I can read Goldies emerald subs
But for some reason fun cards don’t work but I don’t think it a clock issue
I am going to contact dream media as ask if they have any fixes and will update at a later stage
Nice find. Now who is going to try it first lol
Leroy
XCRUISER HDSR600HD twin sat and terrestrial receiver $OOS *
XCRUISER HDSR385 Avant - sold out$OOS UltraPlus DVB-T and DVB-S2 tuners $49 Remotes $OOS
What, are you meant to put a card in that slot??? I all ways
thought it was for cooling
When you do things right, people won't be sure that you have done anything at all
thats my handy work -it wont fix the whities problem they are one of clock speed not drive level
but you could do this mod then add a crystal drive circuit and it should work. One day i'll draw up the circuit diagram and give it ago
Adobe.
Does not even work for goldies..Unless I have the wrong resistor
CAT. NO. RR0558
Also added this to the cfg line which did not help
SMARTCARD CLOCK FREQUENCY: /dev/sci0 3570000
the card freq is driven internally by the processor -i have tried driving the card with a variable clock -didnt work -the only solution i thing is id some one writes a new driver for the card slot
Well get cracking wilee
Just kidding mate
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