sirius5e

Hi all i am now on my second Dm 800 clone (1 for Vermin 1 for satellite) and have an interesting scenario.
The tuner in both box'es was unable to display an Hd signal of any sorts , it sat at 0% and so like others on here i bought an in line signal amplifier off flea bay.
This made no difference , still no hd signal , even though i have a 1.2 metre Channel master dish with a feedhorn and c120 . 3 lnb.

I tried again today to see if it would benefit from a slight dish movement but it still said 0% signal.

I left the box on BBC HD and went out.
When i came home an hour or so later the video was clearing and showing 99% signal on the box , whats happened ???

rawsy

could the tuners have dry joints perhaps.

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b1gd4v3

Seems like a likely scenario to me!

r44f4rman

Many clone users have this issue - HD channels won't work until the tuner warms up. There is a long discussion on this on 8a8f8. Some suggest to replace the capacitor C1 on the tuner board (one guy reported that he made 4 boxes to work after this fix). I ordered C1 (1000uF 6.3V) and should be getting it on monday. I will let you know if it helped.

BTW - this issue concerns ONLY DVB-S2 channels, DVB-S HD channels like BBC HD work fine.

EDIT: just tested the tuner after replacing C1 capacitor (1000uF 6.3V PANASONIC EEEFK0J102AP from Farnell) and HD channels are now working even if the tuner is cold. sirius5e - try this fix.

stef73

can someone pls help me setup this dm800hd c clone cos its driving bonkers lol im not an idiot but i just dont get what im doing wrong its got gemini 4.40 on it straight from supplier in hk any ideas guys pm me pls

fta101

My issue is that all DVB S2 channels it tunes to causes the dreambox to reboot..

As you say BBC HD is fine.

So you think the cap may help me???

r44f4rman

There are two general issues with DVB-S2 channels on clones. First one was experienced by me and described above. The second type of issues seems to ba ffecting you - a full freeze and/or reboot. As I mentioned in other thread 8a8f8 has a thread regarding this with soultion provided. I'm PMing you the link

FatLadZ

the S2/HD channel bug with my latest SIM2.01 & REV K Tuner fix

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Stolen from another source

I also did run into the S2/HD channel bug with my latest SIM2.01 machines. Both clones came with fan and tuner Rev. K.

It was impossible to get HD channel working neiter by automatic nor by manual scan.

BUT good news! I've just fixed two faulty Rev. K tuners!
To be honest I only followed a hint I got, I don't know the root cause but the fix is working with me!

For faulty Rev. K tuner remove capacitor C1 and insert a 1000UF (16V) capacitor at the marked points (details you'll find in the pictures)!

Of course without any warranty, but as mentioned mine are working now ...

Happy soldering and best regards


http://www.fatladz.com/revkfix.jpg

FatLadZ

oops forgot to mention the U400 chip also gets knocked off the board when a fan has been fitted on the heatsink

chercheur

Dammed...my U400 went on the floor too...