I have a Soundstream T1.6000DL that someone had damaged rather significantly by dead shorting the speaker terminals, all the while using a 'fuse' made of tin foil. The entire power supply transistor set was destroyed, as well as half of the output transistors (all were replaced nonetheless). The board around the 647 and 667 transistors was also pretty significantly burned, I replaced the damaged section with epoxy.
The amp will power on, and draw .2A of current. The included waveform is found on the non-DC voltage legs of the IRFP260N transistors. It will occasionally 'pulse' and draw .4A of current, with a momentary perfectly square high amplitude wave on the aforementioned legs. I figure something on the driver board is damaged; I also hear a 'tick' coming from the general area. I decided to look under the heatsinks soldered on the board over these chips (pictured here) for damage, and I found I cannot read the ICs (U1 and U18). Tried smearing them with thermal paste to help make the etching more readable, but still no real avail. Whether this is factory defacing or damage, I cannot say for sure, but I suspect more that it is from damage -- the 'fading' waveform pictured also appears to either come from (or at the least go through) these ICs.
I'm hoping one of you with a bit more knowledge and experience may be able to identify these (I know it's a long shot from what IS readable), and maybe shed a bit of insight here. Thank you for any assistance you can provide!
The amp will power on, and draw .2A of current. The included waveform is found on the non-DC voltage legs of the IRFP260N transistors. It will occasionally 'pulse' and draw .4A of current, with a momentary perfectly square high amplitude wave on the aforementioned legs. I figure something on the driver board is damaged; I also hear a 'tick' coming from the general area. I decided to look under the heatsinks soldered on the board over these chips (pictured here) for damage, and I found I cannot read the ICs (U1 and U18). Tried smearing them with thermal paste to help make the etching more readable, but still no real avail. Whether this is factory defacing or damage, I cannot say for sure, but I suspect more that it is from damage -- the 'fading' waveform pictured also appears to either come from (or at the least go through) these ICs.
I'm hoping one of you with a bit more knowledge and experience may be able to identify these (I know it's a long shot from what IS readable), and maybe shed a bit of insight here. Thank you for any assistance you can provide!
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I contacted Soundstream directly, regarding this part. After much, and I do mean much struggle, I got ahold of someone that could help me and got them to cough up the part number. It is IR21844S for U1 and U18. I no longer need help at the moment, just updating this in the off chance anyone else may encounter this post in the future.
That's a good question. Sorry for such a late response. I just came back to say I got a whole new driver board. They forgot to deface the IC's for the (search term friendly keywords here) Drive Amp PCB-(B)A01 driver board. So, for any others that might have had the same question I did, the IC list on this board is as follows:
U1 : IR21844S
U12 : TL072C
U13 : LM293
U16 : LM311
U18 : IR21844S
They wouldn't give up U16's ID when I messaged them, so this is for anyone else that might have this trouble.
Also, now I have 'some sort of' audio out, but just a 'chirping' noise. It now draws about 1.1A. Going to dig further before I outsource this problem further.
U1 : IR21844S
U12 : TL072C
U13 : LM293
U16 : LM311
U18 : IR21844S
They wouldn't give up U16's ID when I messaged them, so this is for anyone else that might have this trouble.
Also, now I have 'some sort of' audio out, but just a 'chirping' noise. It now draws about 1.1A. Going to dig further before I outsource this problem further.
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