LED's failing on my Herbert.

[MR MARCUS]

When I got my Herbert the ch3 LED wasn't working, but now they are going down at a rate of about one a week. The only LED's that work now are loop, mute annd store. HELP!

 

[duesentrieb]

It is easy to replace them. Push them gently into the chassis, unsolder the leads. Install standard 3.5V blue LEDs. The longer wire is "+". + and - are labelled on the PCB.

 

[steve_k]

How do LED's burn out? Crazy....

 

[duesentrieb]

Blue LEDs are known to have a bigger failure rate than red, yellow or green LEDs.

Actually it was not too easy for the researchers to "create" and manufacture blue LEDs at all. I remember back in the 80s when it was a challenge to think about how to do that . . . (I'm a former reasearch chemist) . . . anyway, they are a bit more sensible then the others . . .

But it could be worse, Peter could have used pink or turkis as a color, even more sensible than blue

 

[Gutmann]

Blue LEDs are known to have a bigger failure rate than red, yellow or green LEDs.

Actually it was not too easy for the researchers to "create" and manufacture blue LEDs at all. I remember back in the 80s when it was a challenge to think about how to do that . . . (I'm a former reasearch chemist) . . . anyway, they are a bit more sensible then the others . . .

But it could be worse, Peter could have used pink or turkis as a color, even more sensible than blue

Pink ones would fit nice to this one:

By the way - was it Lynch?

 

[MR MARCUS]

It is easy to replace them. Push them gently into the chassis, unsolder the leads. Install standard 3.5V blue LEDs. The longer wire is "+". + and - are labelled on the PCB.

Thanks. Exactly the answer I was looking for.

 

[nbarts]

It is easy to replace them. Push them gently into the chassis, unsolder the leads. Install standard 3.5V blue LEDs. The longer wire is "+". + and - are labelled on the PCB.

Thanks. Exactly the answer I was looking for.

Shit man, I have to disagree. For some of the LEDs there is so little space for working, that soldering them is not as easy as it sounds. I'm sure for someone like Olaf it's not a biggie, but it sure wasn't that easy for me. I would advice not cutting the feet of the old LED & solder the new one to those.

 

[shadowfax29]

It is easy to replace them. Push them gently into the chassis, unsolder the leads. Install standard 3.5V blue LEDs. The longer wire is "+". + and - are labelled on the PCB.

Thanks. Exactly the answer I was looking for.

Shit man, I have to disagree. For some of the LEDs there is so little space for working, that soldering them is not as easy as it sounds. I'm sure for someone like Olaf it's not a biggie, but it sure wasn't that easy for me. I would advice not cutting the feet of the old LED & solder the new one to those.

+1 was a bit tricky but not impossible. I did the same as mentioned above of just cutting the upper half of the burnt out LED off then soldering the new one to the legs of the old and that did the trick. Just take your time and you should be fine.

 

[duesentrieb]

Yeah, leave some wire from the old LEDs and solder there the new ones.

 

[Pin]

I have a similar issue with my Herberts LEDs however not the same.

The LEDs are intermittent - especially channel 1 and 2 these sometimes come on and sometimes dont when the channels are selected- im sure it doesnt affect operation but it is fairly bizarre. Any ideas?

 

[nbarts]

My 2 LEDs that stopped working used to malfunction before they went all dead.

 

[Pin]

My 2 LEDs that stopped working used to malfunction before they went all dead.

Mines been like this since the offset so about 5 years of malfunctioning, no sign of them stopping

 

[Halikus]

Actually it was not too easy for the researchers to "create" and manufacture blue LEDs at all. I remember back in the 80s when it was a challenge to think about how to do that . . . (I'm a former reasearch chemist) . . . anyway, they are a bit more sensible then the others . . .

Interesting indeed, researchers are having similar issues creating blue OLED's for next gen screens right now.