No DVB-S2 signal DM800 Clone

[southpaw]

Hi All , i have just set up my 1m motorised dish with dm800 clone , (bl 75 and rev k tuner).
When setting up i have now realised my setup isnt getting a signal at all on dvb-s2 channels ,no signal , tune failed and strange noise from tuner on hd channels (definately not fan noise) dvb-s works fine ,even on nabilo sat-finder when selecting dvb-s2 in sub menu signal drops to 0.
Can anybody advise if doing C1 , Q1 , Q2 , and Q3 change will fix this issue as its driving me crazy , i have tried 20db inline booster and no change ,

Anyone have any experiance of this fault and know of a fix , any advice appreciated :top:

[dctyper]

that is the correct fix for that problem

dc

[bubbles69]

It does sound like the tuner has gone are you scanning and the bar is moving faster than normal and finding 0 channels, also 20db in line amp is no good for dm800 you need a slope 13-18db

[southpaw]

Thanks DCT , will post results after upgrade

[southpaw]

doesnt seem to move faster than normal bubbles ,
yes , when scanning with DVB-S2 selected , returns zero channels

[southpaw]

can anybody test on satfinder within Nabilo image , does your signal drop to zero when changing from DVB-S1 to DVB-S2 ,
not getting signal on mine , however now getting some signal when on hd channels , are all hd channels DVB-S2 ?

Thanks in advance

[bubbles69]

Your tuner sounds dead to me m8..

[karthik77243]

hai everybody i am new user in this feild i have honda city vtex when we start car its radiator$condunser fan work but when ac on its not work.i check ecm on other car its same so its ecm fault pls help me its urgent

[blueflash234]

i have the same problem when i use the dvd s option i can pick up a lock on a satellite but when i change to dvd s2 i do not pick up anything what is the c1,q1, q3 fix thanks

[southpaw]

i have the same problem when i use the dvd s option i can pick up a lock on a satellite but when i change to dvd s2 i do not pick up anything what is the c1,q1, q3 fix thanks

Hi Mate , i eventually fixed this issue by changing c1 capacitor only , and purchased a booster ,

are you any good with a soldering iron
what rev is your tuner

[southpaw]

hai everybody i am new user in this feild i have honda city vtex when we start car its radiator$condunser fan work but when ac on its not work.i check ecm on other car its same so its ecm fault pls help me its urgent

what image you using lol

[deffc0n]

What is rev is tuner ?

[blueflash234]

i have no idea what rev is my tuner where would i find that information, niablo blackhole v12 bootloader 72, can u take a picture of the board and point out the c1 capacitor ,where would i get a new capacitor cheers mate for the reply:cheers:

[southpaw]

you would have to remove the tuner from dm , rev is printed on the underside , j or k ,

i used these caps too replace
16V 1000uF 105?C electrolytic radial Capacitor X 5pcs on eBay (end time 05-May-10 13:01:06 BST) (http://cgi.ebay.co.uk/16V-1000uF-105-C-electrolytic-radial-Capacitor-X-5pcs-/180503141280?cmd=ViewItem&pt=UK_BOI_Electrical_Components_Supplies_ET&hash=item2a06d35ba0)

[southpaw]

blueflash , pm sent to ya

[deffc0n]

Replace new Q1/Q2/Q3 :)

[karthik77243]

what image you using lolididnt understand what image u want

[karthik77243]

what image you using lol
what component in my ecm box is damage or short pls help

[karthik77243]

which component in ecm is damage or short pls help

[southpaw]

which component in ecm is damage or short pls help

sorry Karthik , this is a satellite tv forum , not a car repair forum , ecm your refering to is totally differant to the one i am , best of look , hope you get it sorted :top:

[bluebottle]

Hi I have this problem to, but sometimes if I go to a free HD channel which I can see no problem say bbc1 hd then switch to another HD channel it sees it ok. It dosent always work though. I think I need to mod my tuner. Does anyone know wheather this should be a warranty repair it is a clone but bought from a reputable supplier in December?

[southpaw]

Hi I have this problem to, but sometimes if I go to a free HD channel which I can see no problem say bbc1 hd then switch to another HD channel it sees it ok. It dosent always work though. I think I need to mod my tuner. Does anyone know wheather this should be a warranty repair it is a clone but bought from a reputable supplier in December?

never thought of that mate (warranty) , might be worth sending an email , failing that the C1 cap change is pretty straight forward , never tried the q1 q2 q3 as didnt need to and didn`t fancy it as there bloody tiny , your December box is probably rev k tuner , same as mine therefore c1 change should fix it ,
i am doing one at the weekend , so could take some detailed pics for you if you wish

[bluebottle]

never thought of that mate (warranty) , might be worth sending an email , failing that the C1 cap change is pretty straight forward , never tried the q1 q2 q3 as didnt need to and didn`t fancy it as there bloody tiny , your December box is probably rev k tuner , same as mine therefore c1 change should fix it ,
i am doing one at the weekend , so could take some detailed pics for you if you wish

Thanks Southpaw, I am pretty handy with a soldering iron so I will give it a go, I will check with the warranty first though. The picture in this thread looks clear enough but it wouldnt hurt to have more, Cheers.

[bluebottle]

No responce back from the supplier (which I am surprised about) so it looks like I will mod it myself. I have been looking on Fleabay for a capacitor I can get 6 for around ?2.00. Southpaw how big should they be? Just check though and mines a rev J? I will have a google for J repairs but if anyone has info pictures please post.

[southpaw]

dont worry about size mate , the spec of the cap is the important detail ,
pm sent mate

[bluebottle]

dont worry about size mate , the spec of the cap is the important detail ,
pm sent mate

Thanks southpaw I have replied. I have found a mod for the J it only requires an extra capacitor so its worth a shot I will keep you posted once I buy one and try it. :)

[bluebottle]

Thanks southpaw I have replied. I have found a mod for the J it only requires an extra capacitor so its worth a shot I will keep you posted once I buy one and try it. :)

It worked, I now get all HD channels I go on! The only difference is I fitted a 1000uF 16v not a 680uF as the picture showed.

[o71g]

Do you have the link for this J mod, I could do with it as for some reason my cap has fallen off???

:banghead:

[bluebottle]

Do you have the link for this J mod, I could do with it as for some reason my cap has fallen off???

:banghead:

Here you go

DM800 Easy tuner mod (REVJ).pdf (http://www.mediafire.com/?ujwhwt2noez)

I hope this is alright to post, I have read the rules so it should be ok ?

[o71g]

Bluebottle

Thankyou, it makes it so much easier to understand when you can see pictures.

Is it normal for the componets on the tuner to touch the heat sink on the cpu (clone box not original). I think that is why one of the cap has dropped of my board. I have a Rev J board.

[bluebottle]

Bluebottle

Thankyou, it makes it so much easier to understand when you can see pictures.

Is it normal for the componets on the tuner to touch the heat sink on the cpu (clone box not original). I think that is why one of the cap has dropped of my board. I have a Rev J board.

Mine dosnt touch as far as I know, there is a foam block supporting it as well.

[o71g]

I also have the foam block but the heat sink just slightly touches one of the caps, well it did until I removed the tuner cos it wasn't sitting right.
Now it come off, to top it all off my soldering iron has died.

Guess it's down to maplins to purchase a new one.

Cheers for the reply mate.

[champions_ltd]

I have the same prob with an original rev.K tuner, is it fixed with the exchange of the 1000u cap, also for originals?

[southpaw]

Hi Champ , welcome to the forum btw , removing C1 cap , and soldering 1000 uf 16v as per pic , cured my tuner , rev k

[mmd005]

i hope it will work with me because am facing same issue too

[docent777]

I have the same issue with my dm800 clone from chine, when i change to DVB-S2 i get 0 channels. Any idea how to fix tuner?

[emilioti]

maybe new list?

[bribonanzo]

all is OK thanks

[topalovic]

i have the same problem can somebody help me

[spooky1998]

Same problem here too :(

[riadhrom]

Same problem here too :banghead:

[sunlit3]

I have the same problem .. can I get the picture of mod

[hees]

hope that am on the right place i have a headache cuz of this hd issue

[momo3613]

you would have to remove the tuner from dm , rev is printed on the underside , j or k ,

i used these caps too replace
16V 1000uF 105?C electrolytic radial Capacitor X 5pcs on eBay (end time 05-May-10 13:01:06 BST) (http://cgi.ebay.co.uk/16V-1000uF-105-C-electrolytic-radial-Capacitor-X-5pcs-/180503141280?cmd=ViewItem&pt=UK_BOI_Electrical_Components_Supplies_ET&hash=item2a06d35ba0)

I WILL TRY
I HAVE A REV K ON MY DM
DO I HAVE TO CHANGE IT WITH THE SAME CAPACITY?