Need help with dead Trigger iO

[matlevo12]

Hello to you all !

First post here, since it's the first time I need help with an Alesis product
I just "bought" a Trigger iO module (meaning it came with a clamp and baseplate that i needed for my samplepad, and the supposedly worrect power adapter). The guy said it just stopped working one day.
The thing is... the power adapter he gave me with it is a standard 9V... DC ! The Trigger iO accepts only 9V AC or usb power, I'm guessing he plugged it with it and it stopped, but he just won't answer my messages now, nevermind

Since I'm not new at trying to fix stuff (including simple electronic stuff like testing or changing electronic parts) I'm trying to bring it back to life.

Here are the things I know, for now :
- I don't have a 9V AC adapter right now, I ordered one and I'll get it in a few days hopefully
- it won't turn on using the USB cable and it isn't recognized by my computer
- nothing looks burnt or cooked on the inside
- the solders look very good, nothing looks like it moves (i checked with a mignifying glass and lots of light)
- I tested the first diodes next to the power adapter socket (I took them off the pcb) and they're ok
- the only strange ting I noticed if a 50kohm resistor that looks like it's been soldered by someone and didn't came out of the factory like that. It's a clean solder between two surface mounted capacitors (C59 and C61, on the 3/HIHAT and 4/RIDE "column")

Does anybody know a bit about this ? Any schematics available ?
Any help would be sincererely appriciated.

I'm sorry if my english is a little clumsy (bonjour !) and if I didn't find the info I'm asking for on the forum (I did look for it and searched but I could have missed something).

Thanks a lot !

[matlevo12]

Hello

I contacted the alesis customer support and they sent me the Trigger io service manuals, here they are attached to this message.
Btw if an admin could tadd them to the "sticky" post, maybe people could find them more easily.

One problem though, the manuals don't say what I'm supposed to measure on the test points... and that's weird.

Anyway, I still haven't received the good adapter (I receive the wrong one actuelly...), si I still can't test anything but if someone has a clue for me, that'd be nice !

[matlevo12]

Alesis Trigger io Service manual part 1/3

[matlevo12]

Alesis Trigger io Service manual part 2/3

[matlevo12]

Alesis Trigger io Service manual part 3/3

Had to split the file, it wouldn't load otherwise.

In the meantime I took out the stawoway resostir, and tested a few easy test points (ones with clear coltage or mass) and found a weird voltage coming from a chip, which tunred out to be overheating a lot (U9, a C8051F345 chip), so I ordered it. I'll be back with the results (if anyone's interested !).

[damusic]

Thanks a lot matlevo12 for uploading alesis trigger io service manual, it helped me in solving my problems

[snxizer]

weird voltage coming from a chip, which tunred out to be overheating a lot (U9, a C8051F345 chip), so I ordered it. I'll be back with the results (if anyone's interested !).

Hi! I know the topic is so old, but were there any results after replacing U9? It's an MCU so just replacing it would not have led to anything... So i'm interested, did you also get the firmware for the MCU from the Alesis customer support or not? Mine has several problems so i would be appreciated if there was any firmware. Thanks a lot for the service manuals though!

[Chaser]

weird voltage coming from a chip, which tunred out to be overheating a lot (U9, a C8051F345 chip), so I ordered it. I'll be back with the results (if anyone's interested !).

Hi! I know the topic is so old, but were there any results after replacing U9? It's an MCU so just replacing it would not have led to anything... So i'm interested, did you also get the firmware for the MCU from the Alesis customer support or not? Mine has several problems so i would be appreciated if there was any firmware. Thanks a lot for the service manuals though!

Welcome to the Forum !..

I don't know if you'll get a response as the OP didn't follow up.
Alesis is known for Not handing out Firmware or "Intellectual Property" for their products..only updates for the installed Firmware.
Alesis had never released a Firmware Update for the TriggerIO...the last update of any kind was a SysEx update for settings for use with BFD Lite (BFDv1.5-BFDv2.0) in 2009.
Since then the TriggerIO has been discontinued and Licensing is now with ddrum/DDTi which has had Firmware updates..however NOT Compatible with the TriggerI/O
Example: the DM10 2.0 was Licensed to Pearl for the REDBox...basically the same Hardware however the Firmware is setup for Licensed use.

Alesis Trigger I/O vs ddrum DDTi (New Generation)