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Taramp 10k and 15k
Taramp 10k and 15k
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Old 27th April 2019, 01:20 AM   #1
garnerm is offline garnerm  United States
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Default Taramp 10k and 15k

I am currently working on 2 Taramps one is a HD10000 2ohm and the other is HD 15000 1 ohm. Both have dead output sections but the power supply survived fine.

Both go into protect even with all of the output mosfets off so I'm going assume it has a bad drive circuit. On the 15k HD I took IC1 and IC2 off and it no longer goes into protect so I think they are the drive ICs but I can't find a data sheet or them for sale on mouser or anything. The part number on top is S18244BB. So here are my questions. Are these the drive ICs or am I crazy? And where can I get some new ones or what is a good replacement?

By the way the 10k has the same 2 chips in the same spot.
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Old 27th April 2019, 01:55 AM   #2
Perry Babin is offline Perry Babin  United States
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If you don't get an answer, post high quality photos of the markings on the ICs and another of the surrounding area. It may help in identification.
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Anyone who purchased the repair tutorial, email me (babin_perry@yahoo.com) if you want to download the latest version.
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Old 27th April 2019, 02:06 AM   #3
jkrokenberger is online now jkrokenberger  United States
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From what I have gathered is that Taramp's has great customer service and will sell the parts to you if you call them and tell them what you are working on and what you need.
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Old 27th April 2019, 03:53 AM   #4
Perry Babin is offline Perry Babin  United States
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If you get any useful information from Taramp, please post it here. Someone else may have the same problem.
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Anyone who purchased the repair tutorial, email me (babin_perry@yahoo.com) if you want to download the latest version.
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Old 27th April 2019, 06:18 PM   #5
garnerm is offline garnerm  United States
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Attached are the requested photos. I attached the photos of the 10k the 15k HD looks exactly the same on the output section the only difference was the fets.



The 15k pulls about 2 amps which seems a little high for just idling with no output fet and no driver IC on it. but nothing is getting hot. maybe that is just because its turning 12v dc into 150 on the rails lol. I would hate to shock myself with this one.
Attached Images
File Type: jpg 2019-04-27-134852.jpg (38.4 KB, 153 views)
File Type: jpg IMG_20190427_133958.jpg (640.3 KB, 148 views)
File Type: jpg IMG_20190427_134019.jpg (639.8 KB, 144 views)
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Old 28th April 2019, 02:43 PM   #6
yoppi is offline yoppi
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hello


The SI8244BB is a driver of igbt transistors. The pre-driver is tl712.
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Old 28th April 2019, 03:00 PM   #7
garnerm is offline garnerm  United States
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When I remove the S18244BB it stops going into protect so I am guessing they are at fault.

The TL712c I was able to find the datasheet on. Before I start probing it with the scope what ground point should I use? The main ground or the RCA ground. Sorry for the noob question this is just my first amplifier to get this in depth on it.

Btw thank you so much haha. I've been reading that as a 1 this whole time which is why I couldn't find it's si8244bb

Last edited by garnerm; 28th April 2019 at 03:06 PM.
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Old 28th April 2019, 05:17 PM   #8
yoppi is offline yoppi
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The amplifier must be fully assembled so that it does not enter protection. Normally when the igbt is shorted, it is necessary to replace SI8244BB and check the zener 15v that are not shorted. install the new transistores igbt and turn on.
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Old 30th April 2019, 02:33 AM   #9
garnerm is offline garnerm  United States
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Just updating where I'm at right now with it. On the 10k it does have 3 bad 15v zener diodes so I will get more when I order the mosfets for these boards. The 15k all the diodes tested out fine.
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Old 8th May 2019, 02:15 AM   #10
garnerm is offline garnerm  United States
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Just a quick update on the amplifiers. The 10k I replaced the bad zener diodes with melf 1w 15 volt, put the new fets(same as came off) and new drive ICs on it. Works good. Not seeing any issues. The 15k did the same with it and the low side fets run hot even on the heatsink. I am letting it cool back down and then I will get a reading of the drive waves. It's doing it on both sides of the amp but only on the low side.
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