Thread: QQ-Box USB DVB-S Tuner - Unknown Device?

Blacksnake-

You must apply the electrical insulating tape to either the PCB or the USB end plate. Without this the tuner will "FLY".

See post #147.

Originally Posted by 1ADAM12

Blacksnake-

You must apply the electrical insulating tape to either the PCB or the USB end plate. Without this the tuner will "FLY".

See post #147.

OK, thank you again for the help.
I read the post #147, but I sill have some doubt about where place the insulate tape.
I am placing here some picture that I have just took form the QQ-BOX board.
Could you please indicate where should I put it?

Blacksnake do you have the right type of LNB for the satellite you pointed at? I dont have a qqbox yet but you put the electrical take where electricity will touch the case. . . it is a common sense fix, not a technical one that you need to be precise with. Just stop it from short circuiting.

Originally Posted by realbigmike

Blacksnake do you have the right type of LNB for the satellite you pointed at? I dont have a qqbox yet but you put the electrical take where electricity will touch the case. . . it is a common sense fix, not a technical one that you need to be precise with. Just stop it from short circuiting.

As I mentioned, I am able to use my LNB+ dish with a normal decoder(receptor), and it’s work fine, I can get more than 200 channel. It’s a LNB universal for C-KU band no circular. It's work pretty good. The problem is when I use it with the QQ-BOX. With it I cannot get I good quality signal.
I have not use the QQ-BOX before, but I have experience with dishes/ antennas and TV receptor.

Hope this picture helps.

If you can remove the USB end plate by removing the four screws, you can put a strip of tape there instead. The screws on my box had stripped screws so I can't remove it.

blacksnake-

If you can remove the USB side end plate, lay it flat and take a picture with the marked side down, i'll post it with the area the tape goes to.

The
DVB-S USB PCTV Driver

link is back up for download of the driver.

Originally Posted by 1ADAM12

blacksnake-

If you can remove the USB side end plate, lay it flat and take a picture with the marked side down, i'll post it with the area the tape goes to.

Thank you for the tips, I appreciate it!
I understood where tape goes.
Now, could you please let me know what this tape does?
What I need out it?
Thanks

In a receiver that has to operate at high frequencies special care is taken by the design engineer to prevent unwanted oscillation. To this end "Vias" are placed around the PCB. Vias are plated through holes in the circuit board. and tend to kill stray capacitance and inductance elements that would hurt stable operation.

When the manufacturer ground off the end of the circuit board to make it fit in the Version 05 box he degraded the circuit board. The tape insulates and also forms a capacitor that makes the PCB more stable.

New PCB will not have this problem but the manufacturer has to use up the old stock first to save cost.