Denon DP-100M Power Issue

Hi,

I was wondering if anyone here knew how I could get hold of a circuit schematic/service manual for the Denon DP-100M. I think that owing to the relatively small production run, these do not appear to be readily available from the usual manuals outlets.

I have a power issue with my turntable. It has a 'latch' system for power up/off, in that you press the switch one and the deck powers up, pressing it again sends a signal to power the deck down. On first press, a relay engages to keep the deck powered. However, mine will not 'latch' - it can take multiple presses before it does finally stay switched on, which worries me that I may damage the deck if I am having to press the on/off switch so many times. 

Has anyone here experienced this sort of issue with this or any other turntable in the Denon range? I have checked the switch, and it appears to be working fine.

Can anyone help, please? Other than the switch issue, the deck is working fine.

Thanks in advance,

Paul.