INTRODUCTION:
Denon's DP-30L is a great turntable, good entry level, well designed and engineered.
Nice heavy beastie - weighs around 10Kg, good solid platter
Drive drive motor is made to last, one of the largest and best made that I have seen - built like a battleship
The DP-30L features a good solid speed control (feedback loop compared with a reference signal)
Auto lift without using any gears, this works very nicely
No clumsy gear systems around the tonearm which might restrict free movement of the arm - end of record detection is via a photo interrupter system.
From an engineering viewpoint, very sensibly laid out - easy to work on
My DP-30L was one of our turntables in our audio production facilities, sitting alongside Linn Sondek LP12's, Technics SP-10's and others.
This Denon DP-30L did its job well (one of our studios specialised in audio archival work) but it has seen better days cosmetically, the tonearm was accidently destroyed by a clumsy staff member and the turntable body had "graffitti issues" so I am parting out the major parts I think might be useful to someone.
Prior to advertising these various sub-sections, the turntable has been powered up today one more time and I checked the most important aspects - motor noise, speed control, end of record detection and the tonearm lift system. Not only functional checks but voltages and control signals where applicable.
EVERYTHING was functioning exactly as it should.
While dissassembling, sometimes I have had to desolder the connecting wires, I have included photographs which should help with re-assembly or servicing
I can also supply a good service manual for this turntable, in pdf format.
You could build up a complete DP-30L with these sub-systems I am offering, the only parts needed are the heavy white/cream body, metal plate underneath the platter and the black base underneath.
All mounting screws for each sub-section are supplied along with the electronics
Denon Direct Drive Turntable
Model: DP-30L
Part number: 3918423006
Magnetic Detection Head
Critical component for correct speed control. This head reads the signal from the rotating platter and this signal is compared to an internal reference signal and speed adjustments are automatically made accordingly.
If this component fails or is poorly adjusted, correct stable speed is not possible
In excellent condition both cosmetically and electronically
Complete with 2x mounting screws
Desoldered from the main board wiring, connects to points 1 & 2 on the main board - it is not polarity sensitive however the connections are very clearly shown in the service manual.
Fully tested when the turntable had its "final spin" - no problems at all, I checked the waveform at the output of IC1 at both speeds, no issues at all
Since removal from the turntable, this detection head (with hardware) is now stored in a sealed plastic bag
