Have you contacted these:
Denon Factory Service by PanurgyOEM
701 Ford Road (South Dock)
Rockaway, NJ 07866-2053
Denon Factory Service by PanurgyOEM
701 Ford Road (South Dock)
Rockaway, NJ 07866-2053
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.
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.
9 responses Add your response
Dear @vern: You can contacty Denon here looking for its advice: http://denon.custhelp.com/app/answers/detail/a_id/103/related/1 or: www.denon.jp where I found out these phone numbers: 0570-666-112 and 050-3388-6801 Fax: 0443301367. Btw, great TT. ! ! R. |
Hi, Thank you so much for taking the time to help out! Peter, I think you may be right about the relay. I note that there is also a 7400 IC in the circuit...could it be possible that this is not working correctly? Question - would the relay work at all if it is faulty, or does its ability to engage diminish over time? Once again, thank you for taking the time to help, Best Wishes, Paul. |
Well I ended up with a DP100M my self and it had the same power on issue as originally discussed in this thread. Mainly for reference in case someone else is searching this topical add to this what the actual issue is. When pressing the power on/off button which is a momentary switch it switches the mains 100V voltage through a diode a 8K2 resistor and a 1uf 250V Electrolytic cap to the input of an optocoupler which out put toggles a 74LS00 NAND gate. The failing component is the 1uF capacitor - i replaced it with a 1.5uF polypropylene cap (this is what i had on hand and the circuit now works as intended. Part is designated as C14 on the printed Circuit board
Happy Listening every one
Peter
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