denon udm3

[anon]

The info in this thread about the blown PR003 and how to bypass it has saved my UD-M3 from the skip and for that I am very pleased!

Longer story is that after neglecting this stereo for several years with it's dodgy volume control I decided to have a go at fixing it. The volume encoder was soon repaired by removing the grease from the internal encoder tracks and an initial test of the unit, inc. the CD, proved all was well. However, the following day it refused to play or eject. That brought me to this thread and I was able to confirm a high impedance across PR003 and a low impedance across PR004. I then soldered a 500mA 20mm fuse across the PR003 pins using insulated wires to position it to the side of the CD mechanism - I reasoned that if it blew straight away then there must be another fault, otherwise it should last for the longer term and making it externally accessible wasn't justified.

Many thanks to all of the previous posts over the last decade and a half!

[Mrjazzitup]

I have the same issue. The PR003 and PR004 components show continuity when using a DMM. They also are reading a small resistance across the leads. CD tray won't open or close. Laser head seems to be trying to find a track to play once hitting eject button once or twice but that's it. Everything else in the unit works just fine. Haven't tested out of a manually inserted CD would play if I hit play.

Any ideas?

[u56u5u]

gwregwg