Gigabyte GA-7VAXP voltage issues

[kc8adu]

Re: Gigabyte GA-7VAXP voltage issues

most of the tuner cards generate 30v + to run the varactor stage.very low current though so no big demands.at least with the common phillips and temic tuners i see.

[arneson]

Re: Gigabyte GA-7VAXP voltage issues

Nothing to do about your bad caps, but,
I see you've moved from 98se to XP.
You're aware that all older tv cards are not compatable?
My old tv cards are all in a box now, had to buy all new.

[gonzo0815]

Re: Gigabyte GA-7VAXP voltage issues

Don`t know about the tuners, i refered to the power consumption of the high frequency converter at the sat dish.
Those needs usually 300 -1A or more @12-18v.

But in any case, i doubt that this will have anything to do with the caps.

[wij the king]

Re: Gigabyte GA-7VAXP voltage issues

thanks to the all of you for replies, i appreciate

gonzo0815 :
--> i have no firewall installed, even winXP one is disabled and under win98 there is no such feature, so it can't be that i think.
--> about amperage i will verify that and see if the DVB card could be faulty
--> for big vrm caps the bord has already 4x3300 uF = 13200 uF, shall i add some caps??
--> there is one thing to note: let's say i've shutdown the machine at 08h00. when i restart it later (for example 19h00) the card is able to tune channels w/o problems, it lasts normally 10-->15mn and then i begin experiencing signal loss (tuning problems). i had to shutdown the machine for more than 20mn to recover from that issue (but it lasts the same time then tuner lock problems reappears!!), any idea about this?
--> i found the datasheet of the DVB card, you'll find it attached, it may help you understanding this issue (unfortunatly not me)
-->PSU could be the problem origin but i'm not sure of it, i switched mine with another from a freind of mine but i had same symptoms, the hic is that his one is older than mine and morover it is an unbranded one (he bought it 15€!!!)

arneson:
the DVB card works fine under win98SE and winXP, and it was manufactured in 2004 so it's not so old i assume...

any other suggestions would be much appreciated...

[hkivan]

Re: Gigabyte GA-7VAXP voltage issues

Many problems arose from power issues.
So,what is the brand of your PSU?
Unamed brand PSUs were quoted with Peak Power or
simply the max. power drawn from wall socket. They are not
the continuous power output to system.

It is recommanded to have the combined power ( +3.3v & +5v )
near 220W for K7 system. Insufficient power may sometimes lead
to system unstable, add-in card non-functional, poor overclock-ability,
random exits from 3D games....etc.

[wij the king]

Re: Gigabyte GA-7VAXP voltage issues

well on the one i have u can read (if i remember well):
______________________________
| +3.3V | +5V | +12V |
|_______ |__________|_________|
| 10A | 20A | 18A |
|_______ |_________ |_________ |
| 190W | 190W |
|__________________|__________|
| 380W Total |
|_____________________________|

i'm sorry but amperage are probably false, but i'm sure that i've seen the two 190W and the 380W under this exact schema, i'll repost tomorrow for exact infos

EDIT : sorry about the graph, wouldn't come out as i drawn it!!!

[gonzo0815]

Re: Gigabyte GA-7VAXP voltage issues

Well, if that are the correct amperage rating, then you have picked a ver very old psu or an ATX 2.0 psu. Both are in no way suited for an 5v powered amd Athlon xp rig. You could be lucky that it even posts. For that kind of systems, you ned at least 25A@3.3v 25 to 30A@5v and a combined wattage on the 5&3.3v of at least 160w, better 180w to 220w if it should last long and reliable. This numbers are only for proven good brand named psu`s.

And pls state the moddel and brand of that unit too.

[wij the king]

Re: Gigabyte GA-7VAXP voltage issues

thanx again gonzo0815, amperage i indicated are probably false but i'm SURE about combined wattage of 3,3 and 5v, it is 190W
for brand i think it is an unbraded one, i see though that there is a big label showin "2N" in red...maybe that's a brand...
for model i'll post tomorrow, thanx for the care
EDIT : do you have any idea about the symptoms i pointed in a previous post, i.e:

--> there is one thing to note: let's say i've shutdown the machine at 08h00. when i restart it later (for example 19h00) the card is able to tune channels w/o problems, it lasts normally 10-->15mn and then i begin experiencing signal loss (tuning problems). i had to shutdown the machine for more than 20mn to recover from that issue (but it lasts the same time then tuner lock problems reappears!!)

[wij the king]

Re: Gigabyte GA-7VAXP voltage issues

hi everyone
well first here are specification for the two PSU i got:
--> PSU 1:
--> State: not in use
--> Brand : 2N Power supply
--> Model : non specified
--> Maximum wattage: non specified
--> OLP: built in
--> voltages:


--> PSU 2:
--> State : in use
--> Brand : non specified
--> Model : non specified
--> Maximum wattage: 380 W
--> OLP: non specified
--> Voltages :


Please if you have suggestions about these 2 PSU let me know
EDIT : yesterday, with the 380W PSU, i haven't got problems with the DVB card (tuning ok till this morning), nonetheless, i have unplugged 1 HDD, the FDD and my two optical drives (these are 12V components, so i don't know if it helped or not)

[gonzo0815]

Re: Gigabyte GA-7VAXP voltage issues

Cant help me, but unless you post some pic from the internals of your psu i can`t say anything else than that those spec of the psu are IMHO not on the safe side for that kind of system. The 380w unit at least have matematically correct rating, but if i don`t know the brand or the internals i can`t say mutch more. Some (non)brands are to optimistic regarding power output.

In generall, all symptoms you faced with could be caused by a underpowered psu.

For the DVB card, may be there is insufficient cooling on it or the caps are bad. This is very common with some Technisat models at least in Germany. Adding a new cap and or some decent cooling will do the trick. (especially the tuner under the metal lid has to be cooled). But first i would rule out the psu, replacing it with a decent Delta or FSP unit (for the cheap way). At least in Germany some Delta models are avilibale at egay for about 20€.

E.g. the Delta DPS-350PB-2C is rated for 28A@3.3v, 30A@5v and 18@12v.
3.3 & 5v combined wattage is 210w max output for all is 340w.
All caps are capXon brand, therefore it should last several years, Fan is an 12cm.

This decent unit will sell for about 14€ +shipping in Germany and is well suited for any older ATX 1.3 system without the 4pin psu connector.

[hkivan]

Re: Gigabyte GA-7VAXP voltage issues

How old are your PSUs?
Many non-brand PSUs deteriorate faster. They usually have
shorter life span. My delta GPS-420BA-102A has a MTBF of
10 0000 hrs @25C.

You can check your PSUs rails by a DMM, during system start up,
idle & full loading. If it drops below 5% , I suggest you to buy a now one.

The attached pictures are some normal & poor psu internals for
your reference.

[wij the king]

Re: Gigabyte GA-7VAXP voltage issues

Well gonzo0815, i'll try to catch some pics and attach them, the problem is that my 3.3Mpixel Sony DSC is going crazy these days, photos are divided in two, sometimes horizontally, sometimes vertically...go figure....

concerning caps brands inside, they are.....unbranded !!!
on the capacitor u can find only capacitance, maximum voltage and temperatures..idem for other components. i'll try to make some photo to prove that..

concerning DVB card, the technisat skystar2 has only one capacitor, and it is a blue sanyo one in perfect state, the card is also not very aged, i purchased it 13 months ago...maybe you're right about cooling it, the Tuner gets really hot after some use (i've touched it), and as i have a little fan i'll try to fix it on it and see what happens (i really suspect something from heat coz yesterday the DVB ran fine for 10 hours and strangely temps were low (15°) all night --> coincidence or cause--effect???)

for the Delta DPS-350PB-2C, it's unfortunately not available here..in fact in tunisia u cannot find any good quality PSU, unless you buy it in a branded PC (i.e: Hp, IBM, DELL...)...really pathetic don't u agree...
so what i do normally do is buying one of these PSU and then change some caps here and there..
happily i'm going to italy at june 10th, so i'll make some deals there...

hkivan, the one i got is fairly old, purchased in 2005 but manufactured in 2003, for the rails check my specs, you'll see that for 12V i have (in BIOS) 12,49V, for +5V i have 4.50V, and for 3.3V i have 3.04V
so range is nearer to 10% than 5%...but what can i do...even a new one will give me same voltages....damn this country...