Hello,
I think my HT/HC doesn't work because at first I put the 4558 in the wrong way in having forgotten to remove power supply in the same time. So quickly a very bad smell came and I found that I have powered this 4558 inverted and unsoldered, (so maybe some pins were connected and other ones not).
Do you think I have fried it?
Guillaume
4558 inserted in the wrong way (fried?) [SOLVED]
AOP generally are fragile. If you have no spare malaysia 4558, you can try with something else, for example a TL072 or JRC4558D.
Ref: 1011512 - 62
TL72CP is ok, itsn't the original component but it'll work this. I'm building a TR8060 with TL072, it doesn't change much.
This must have less difference between malaysia4558 and JRC4558D.
TL72CP is ok, itsn't the original component but it'll work this. I'm building a TR8060 with TL072, it doesn't change much.
This must have less difference between malaysia4558 and JRC4558D.
Merci!
I finally changed the 4558 with a same one from another Yocto kit because the TL072 I ordered doesn't have a similar mark for the good way to insert it and I wanted to be sure. So I put a new 4558 and unfortunately the high tom still doesn't work...
Has someone an idea of which part could have been damaged when I put the 4558 in the wrong way?
Has someone an idea of which part could have been damaged when I put the 4558 in the wrong way?
I only hear the noise part of the sound in the High Tom sound, plus a little click when the Tuning parameter is high.
Also when it is accented, the click sound is higher, and also present even if Tuning parameter is low.
Also when it is accented, the click sound is higher, and also present even if Tuning parameter is low.
I finally succeed to resolve the issue with my high tom.
The desoldering of the 4558 was obviously difficult and many solder points were damaged. I did the continuity tests to be sure that every point was well connected to its track. Unfortunately the point 3 corresponding to ground was not visually on a track and I thought it was not planned to be connected, but it was this one which was deconnected!
The desoldering of the 4558 was obviously difficult and many solder points were damaged. I did the continuity tests to be sure that every point was well connected to its track. Unfortunately the point 3 corresponding to ground was not visually on a track and I thought it was not planned to be connected, but it was this one which was deconnected!