Hi,
I'm still looking for circuit diagrams but this is just a general query I thought I'd ask the forum.
I'm working on an Alesis MMT-8 sequencer. It is fully functional but I have three LEDs that appear not to be working. When you press one of the buttons marked 'Song' the LED is supposed to light up. Same for 'Edit' and 'Echo' buttons. I thought at first the MMT-8 was faulty, but when you press each of these buttons the unit carries out that action. It echos the midi input, it goes into edit mode and it selects a song. So I thought maybe the LEDs had simply blown, so I opened it all up and checked the leds with a meter on continuity with a buzz. All of the LEDs lit up and buzzed with the meter connected , including these three. Nothing wrong with the LEDs.
I'm baffled that, although pressing the buttons makes the circuit and carries out the action it doesn't light the LED, but the LED is good?
Any initial thoughts anyone?
cheers
Alan
I'm still looking for circuit diagrams but this is just a general query I thought I'd ask the forum.
I'm working on an Alesis MMT-8 sequencer. It is fully functional but I have three LEDs that appear not to be working. When you press one of the buttons marked 'Song' the LED is supposed to light up. Same for 'Edit' and 'Echo' buttons. I thought at first the MMT-8 was faulty, but when you press each of these buttons the unit carries out that action. It echos the midi input, it goes into edit mode and it selects a song. So I thought maybe the LEDs had simply blown, so I opened it all up and checked the leds with a meter on continuity with a buzz. All of the LEDs lit up and buzzed with the meter connected , including these three. Nothing wrong with the LEDs.
I'm baffled that, although pressing the buttons makes the circuit and carries out the action it doesn't light the LED, but the LED is good?
Any initial thoughts anyone?
cheers
Alan