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Hotrodding the X-Fi: A Layman's Guide (No 56k) - Page 113

post #1681 of 2194
Quote:
Originally Posted by the.oldman View Post
ok trying my second x-fi mod did the opamp cap ers paper put back into comp and windows doesnt see it. the cap is a fk 1000uf 16v blackgate is this enough to power the card? i thought i'd try something diff and yes I reseated the card and tried diff slots my fatality red led is lit so the card is getting power any ideas?
my idea: use punctuation.

also, it's likely you broke a trace under the opamp and/or the cap.
post #1682 of 2194
my idea: use punctuation.


gaming keyboard ..chill thnx will chek trace
post #1683 of 2194
Quote:
Originally Posted by the.oldman View Post
my idea: use punctuation.


gaming keyboard ..chill thnx will chek trace
a keyboard is a damn keyboard.
post #1684 of 2194
I just replaced my front L/R opamp with an LME49860 and now I have no right chanel... Tried resoldering it a few times and hasn't fixed it.. any ideas as to what i did wrong?

edit: removed it and looks like i've pulled 2 pads, genius. I haven't been able to find a pinout of where each leg goes to? pulled the middle 2 on the left hand side when you're looking down at the card with the audio jacks at the top. I can just run wires to where the traces go and it should work right ? does anyone have a pinout diagram?
post #1685 of 2194
Quote:
Originally Posted by bb7_rider View Post
I just replaced my front L/R opamp with an LME49860 and now I have no right chanel... Tried resoldering it a few times and hasn't fixed it.. any ideas as to what i did wrong?

edit: removed it and looks like i've pulled 2 pads, genius. I haven't been able to find a pinout of where each leg goes to? pulled the middle 2 on the left hand side when you're looking down at the card with the audio jacks at the top. I can just run wires to where the traces go and it should work right ? does anyone have a pinout diagram?
use a multimeter set to continuity to find where those traces go.
post #1686 of 2194
Thanks for the tip, although I know how to find out where they go, I don't have a multi meter here (just recently left home and all my tools are still there, 3 hours away, as it is i had to buy a soldering iron, solder, and wick yesterday) not real keen on buying a new multi meter just for this.. anyone already traced them out?
sorry to be a pain and ask, if i had a multi meter here i really would trace them out myself.
post #1687 of 2194
Quote:
Originally Posted by bb7_rider View Post
Thanks for the tip, although I know how to find out where they go, I don't have a multi meter here (just recently left home and all my tools are still there, 3 hours away, as it is i had to buy a soldering iron, solder, and wick yesterday) not real keen on buying a new multi meter just for this.. anyone already traced them out?
sorry to be a pain and ask, if i had a multi meter here i really would trace them out myself.
give me a while and i'll have all 8 traces laid out for ya.
post #1688 of 2194
bb7_rider,

Don't know which X-FI card you have, but here's both SB0460 and SB0550:
- eyeloupe for careful inspection, before and after repair
- clean pad area before and after soldering with plastic safe, isopropyl alcohol or similar
- Kynar 30ga wire recommended (wire-wrap type, available at Radio Shack / Dick Smith, in a pinch)
- careful soldering wires to small SMT parts, which might move while soldering
- clean, small tip, low-wattage (15~20Watt) iron
- others have been successful with "trace repair ink/pen" (prefer wire, for less resistance than PCB repair ink/paint)

Also, look back a few pages for other's experiences/solutions with same problem....

Good Luck!

Picture of signal lines for U2 opamp, SB0460:
X-FI-MOD-099c - eSnips, share anything

Picture of signal lines for U7 opamp, SB0550:
X-FI-MOD-117-U7-paths - eSnips, share anything

Both SB0460 and SB0550
Pin #4 (-V) and pin #8 (+V) power pins can be connected to #4 and #8 of opamp below Line-Out, if required

Trace Repair Ink/Pen, Silver based:
INTERTRONICS Trace Technologies Silver Ink Conductive Pen for PCB Repair
post #1689 of 2194
Thankyou so so much, pretty sure mines the 0460, I'm at work right now though so can't check. Hopefully I can fix it when I get home tonight!
post #1690 of 2194
ran a wire from every leg along the associated pathway and i still only have left channel, replaced the opamp, still nothing. maybe i killed one of the tiny SMD resistors with too much heat. don't know what to try now. think i'm in the market for a new soundcard..
post #1691 of 2194
Quote:
Originally Posted by bb7_rider View Post
ran a wire from every leg along the associated pathway and i still only have left channel, replaced the opamp, still nothing. maybe i killed one of the tiny SMD resistors with too much heat. don't know what to try now. think i'm in the market for a new soundcard..
if you want, you can send it to me and i could try to fix it for you.
post #1692 of 2194
thanks for the offer but international postage x2 would cost more than the card is worth ! i'll have another look of it when i'm at home and actually have tools and my lamp with the manifying lense in the middle so i can see what the hell i'm doing !

ordered an auzen prelude today, from an online store that said they had stock, rang later to confirm and got told they have no stock. no apology or anything, didnt even offer to refund the extra i paid for express post cause i clearly wanted it quickly. Bastards.
post #1693 of 2194

Capacitor type confusion

Hi, newbie here...after i read a lot of thread, i getting confuse on cap type and its usage...few question below, hope someone can help me.

1. what Germanium done was 'bypassed' powersupply cap with metalized cap? why he only 'bypassed' and not just replace the stock and solder with metalized cap?

2. What is metalized cap, polarized cap and non polarized cap? How to differentiate? What are those cap usage?

I don't care whether someone either give the explaination here or just give me the appropriate link only...thanks..
post #1694 of 2194
To know a little more about caps, start reading there:
Identifying bad caps - Identifying Bad Capacitors & Related Symptoms - CapsMod Forum - Powered by Discuz!

Bypassing is done to help things out. It is (in general) always better to use two caps in parallel that one. Their capacity increase, but mainly if you use two different ones, you filter best the incomming noise from voltage that go thru the whole mainboard. I would say that a ceramics SMD cap do the same job, tough.
C46, C74, C75 and C172 - all benefit from adding a 10uF 16V X7R SMD ceramic cap in parallel to them. Maybe even the C72, but I have to measure if this is input or output one. If this is a output from the 79L05, then no, as it will trigger oscilations.

Metalized capacitor is the very first (and possibly finest) design of capacitor. Two very thin metal sheets are separated by dielectricum. It is either folded to roll like this:
http://www.germes-online.com/direct/...Capacitors.jpg

or be in the form of box:
http://img.alibaba.com/photo/2004173...r_class_X2.jpg

Reasons to use these caps are their excelently low noise and great filtering abilities. They are great for audio, too. The catch is that they are VERY BIG and even big, the capacity is usually kinda low. They can go to very high voltages, tough then the size increase too much...

Polarized capacitor is capacitor, where the polarization does matter. To metalized cap it does not matter, if the +V is on this pin or on the other. In electrolyte or tantalum dip caps this does matter and capacitor is damaged and even destroyed by overpolarization. A nice example of how I made the mistake and overpolarize a Panasonic FM cap:


Polarized caps offer much higher capacitance and reasonably good audio specifications. They can be made optimized for many purposes, from low-ESR ones to filter the voltage well, to audio ones for audio decoupling - like Rubycon Black Gate C series or Elna RFS.

Non polarized or bipolar caps are made so they did not care about polarity of the voltage, witch is necessary is some cases. A good example of audio grade bipolar caps are Rubycon Black Gate N or NX series:
http://img369.imageshack.us/img369/1700/bg001rl1.jpg
post #1695 of 2194

@trodas

All the caps in X-FI is polarized cap rite? can swap the polarized cap with non-polarized cap or not?
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