Just decided to use my H&C again after being stored away for about 12 months. First the whole thing was blank - no display, no sound. I changed the the power supply from the one that was supplied and the display lit up. I thought that had solved my problem, I can no longer get any sound out of it. It is totally silent. I have tried changing the cables, still no sound when I connect the guitar direct to the amp, bypassing the H&C unit, I get a signal, so cables,guitar and amp are all ok. It has been stored away in its original box and packaging and only used a handful of times and is in absolutely brand new condition. Does anyone else have this problem and if so how did you overcome it ?
The unit is now OK. I contacted the manufacturer and a very nice young Lady called Lin asked me to return it back to them. She phoned me to tell me that the power supply that I had with the unit was faulty and the one that I had used as a replacement was of a different polarity, that was why the LCD lit up but the box wouldn't operate. They have supplied me with a new power unit and it now works perfectly. I had to pay £25 for the postage and the power unit which seemed reasonable.
Hi....the echo works off 12 volts AC as far as I am aware....so there is no polarity.....sounds like your 12v AC PSU packed up and you tried a DC PSU which wouldn’t work and didn’t cause any damage........👍
This behavior is very common with gear like that. Also the quadraverbs (except Q20) and the magicstomp behave like that. It's because only the 5V DC (needed for the digital part) are directly connected to the 12V AC (via a rectifier). The -12V DC and +12V DC for the analog processing are coupled by capacitors to the 12V AC comming from the power supply so they are missing if you use a 12V DC supply. As a consequence, the digital part works but the analog part gives no sound at all!
Nothing dangerous, but confusing, if you do not know about the background ...