Anonymous Coward wrote:For anybody curious to know, I found the pinout for that damn test point connector on the early creative labs cards. It's the bi […]
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For anybody curious to know, I found the pinout for that damn test point connector on the early creative labs cards. It's the big one located just in front of the IO ports (usually as AUDIO PWD)
From top to bottom:
1 MIC GND
2 MIC GND
3 MIC IN
4 SPK GND
5 SPKR Speaker Output - Right Chan
6 SPKL Speaker Output - Left Chan
7 SPKRL Left Speaker return
8 SPKRR Right Speaker return
The jumper next to it (usually labelled RSPK_EN) is connected to to pins 5 and 8 on the AUDIO PWD connector (so that you can jumper those two pins together).
http://support.dell.com/support/edocs/dta/SBPRO/00000009.htm
I was hoping this jumper block might hold the key to disabling the internal amp, but sadly no.
Oh man I was looking for this information!
I have a Soundblaster Pro 2.0 OEM (CT1680) and couldn't find information on jumpers. Most are obvious (IRQ, address, DMA) but I always wondered about these pins just behind the jacks...
Question for you!
If you remove these two jumpers that seem to feed the signal back into the card, does this get you the signal before the volume dial? So if you dial the volume dial, it has no effect? That would be a good solution in case your volume dial is on the way out...
I have a SB 1.5 and the dial need some wiggeling to get it going 😁
Or are these pins simply an easy way to hook up test equipment for creative tech guys...
If you are still looking for a solution how to get a non amplified signal I had a look at the SB 1.5, 2.0 and Pro cards and they all use a TEA2025B Stereo amplifier chip.
You can get the datasheet from here: http://www.datasheetcatalog.org/datasheet/stm … ronics/1523.pdf
It looks like you just need to grab the signals going in from pin 7 and 10. And tehre are plenty of areas to get ground, even on the chip itself on various pins.
You really just need to solder 3 wires on the back of the card and you are done. It looks like a peace of cake to be honest, and I will for sure give it a go. I have big plans for doing recordings and if I can get a good signal from every card, pre amplified it would make my life a lot easier , especially on the really old cards with busted volume dials!
I will likely just use a IC test clip rather than soldering. Don't really like soldering on vintage stuff 😁