Hi I have one of the above amplifiers and it randomly jumps the input. I believe this is due to a worn/dirty rotary selector control. So I thought I'd source a replacement part, but have been unable to find one online. I did find one for the PMA535R on ebay, which looks the same (https://www.ebay.co.uk/itm/154325062392) so does anyone know if the PMA535R one would work with my PMA355UK. Also asuming it doesn't would acquiring a remote control and using that to change input channels provide an alternative. If not can anyone recommend a good repair technician in the UK, preferably Bournemouth and surrounds that might be able to clean and fix the switch?
Thanks for the reply huggygood. My school boy French is just about able to follow what is going on in the pist you sent the link to, especially with the pictures. I shall give it a go when I have a spare couple of hours.
Here is one in English
https://audiokarma.org/forums/index...ems-with-input-selector-heres-the-fix.218030/
These were used in a lot of Denon and also Kenwood gear, and failure mode seems to be the same (mucking up of switch contacts, leading to unpredictable switching action). Note that depending on your unit, you may be able to open up the switch for cleaning without desoldering all the pins from the PCB (i.e., leaving the base of the switch mounted to the PCB), as was done in this link.
https://audiokarma.org/forums/index...ems-with-input-selector-heres-the-fix.218030/
These were used in a lot of Denon and also Kenwood gear, and failure mode seems to be the same (mucking up of switch contacts, leading to unpredictable switching action). Note that depending on your unit, you may be able to open up the switch for cleaning without desoldering all the pins from the PCB (i.e., leaving the base of the switch mounted to the PCB), as was done in this link.
Well 14 month's later I managed to find the tine to do the switch clean. Many thanks to northpaw and huggygood for the links, they really helped and I now have an amp where I can change channels. I may even source a remote for it.