Re: Soundblaster AWE32 CT3670 One Channel problem
Posted on Yesterday, 17:03
Whoops, yes, C146, right above the left side of speaker amp.
Re: Soundblaster AWE32 CT3670 One Channel problem
Posted on Yesterday, 07:39
C416 passes right channel to the speaker amp, it looks pretty crusty and probably is the culprit. You can also check L5 for continuity as it also is in line with right channel to speaker output. The capacitor has 0.33µF capacitance, voltage rating should be anything higher than 12V. I'm not sure …
Re: Soundblaster AWE32 CT3670 One Channel problem
Posted on 2021-02-28, 14:52
It looks like several capacitors have leaked on the card so a recap is in order, and that should fix all the problems the card is exhibiting.
Re: CHiLL XL enclosure
Posted on 2021-02-27, 17:40
A leg would be a nice idea. I'm not aware of anything bigger, this is supposed to be the max size.
Re: Fried MB
Posted on 2021-02-27, 16:37
I missed that inductor completely, yeah, there's definitely a short down the line somewhere...
Re: Fried MB
Posted on 2021-02-27, 16:22
Sometimes transistors and other silcon shorts and dies like so. It looks like the switching transistor of some voltage regulator gave up. Assuming no other problems, replacing the transistor and the close by capacitor will make things work again.
Re: Video Card prices
Posted on 2021-02-27, 14:45
Yeah, one of Bitcoin's big things was that it has finite amount of them, there will be a point when all of them get mined. In theory lowest value for them is the cost of energy used to mine them.
Re: Looking for a reference design schematic for a rare chip
Posted on 2021-02-26, 04:06
The short answer is that this info will never come / doesn't exist. Longer answer is that when you know how the 286 and 386 buses work, the datasheet of that chip provides enough info to build the thing you're after. Most of it made sense when I went though the datasheet and there shouldn't be too …
Re: Cursed 16-bit ISA super-IO controller cards, or just me?
Posted on 2021-02-26, 03:47
That board needs a lot of work before it can work properly with any card. All the corroded parts need to be removed, cleaned or replaced altogether. There's probably bad vias and other things too that must be repaired. Some photos of both sides of the board near the battery will be helpful in …
Re: Original Hardware: PCI clock measuring device.
Posted on 2021-02-25, 11:20
These look nice ~
Re: Custom made, 50ns, FPM, Simm 30, memory modules with parity.
Posted on 2021-02-25, 03:45
While the addressing scheme looks like there is the exact same amount of CAS pages, the internal organization is different. It is very common for 1M x 1 chips to be internally organized the same as a 256K x 4 chip, where two address bits (often the highest row and column bit) are used to select …
Re: Who could repair a Yamaha DB50XG daughterboard ?
Posted on 2021-02-24, 15:34
I have repaired one DB50XG which was silent. It turned out to be a defective DAC chip on that particular card.
Re: Custom made, 50ns, FPM, Simm 30, memory modules with parity.
Posted on 2021-02-24, 02:34
How are there problems ? There's exact same amount of CAS pages and thus refresh cycles between the two organizations. If anything, 8/9 chip sticks propose challenges due to increased loading on the bus due to way more capacitance per signal which will bring rise and fall times down...
Re: Video Card prices
Posted on 2021-02-20, 05:09
nvidia announced special crypto mining chip, perhaps it will get the miners off GPUs and things can stabilize, but who knows when it hits the markets and what impact it'll have...
Re: Creative ISA Sound Card Floating Op-Amps Running Log/List
Posted on 2021-02-19, 09:12
A low grade opamp will exhibit phase reversal on its output when the input goes out of range but it isn't gonna cause damage or anything. It is a major annoyance with things that actually do something in the signal parth, since the effect is similar to digital overflow and produces loud cracking …
Re: Orpheus Soundcard: a new DOS soundcard with SPDIF/OPL3/MPU support
Posted on 2021-02-19, 00:25
That ADPCM is probably just WSS ADPCM that all WSS codecs support in addition to couple raw PCM formats.
Re: What if - other sound chips and synths that could have been made into PC sound cards
Posted on 2021-02-18, 19:11
Actual wavetable idea (that Namco chip, TurboGrafx16/PC Engine, Apple IIGS, some arcade boards) should have found its way to PC, even if it meant only a ROM bank without RAM, it could have still provided some great possibilities with cost between FM chips and proper samplers/ROMplers. There were …
Re: Creative ISA Sound Card Floating Op-Amps Running Log/List
Posted on 2021-02-16, 12:15
It isn't strictly necessary to connect things to a ground or some other midscale point, the point is to stop the opamp from misbehaving and connecting an input to some rail will put it into steady state where it will be stabilized and incapable of starting any problems. There may be slightly higher …
Re: Creative ISA Sound Card Floating Op-Amps Running Log/List
Posted on 2021-02-16, 00:37
In those quad opamps you can do it by shorting the two outer pins (output and negative input) and then the remaining pin (positive input) with middle one (power rail). This creates a buffer connected to one of the voltage rails, and this would stop it from oscillating or doing some other strange …
Re: Creative ISA Sound Card Floating Op-Amps Running Log/List
Posted on 2021-02-15, 23:42
CT3620 has floating opamps in at least one spot : Filename IMG_9973.jpg File size 32.77 KiB Views 465 views I no longer have the card as it got sent to new owner today...
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