Hi there,
Relative noob here with limited skill, hoping someone can point me in the right direction.
I've recently acquired two Denon DN2000F Mk3 CDJ units. Some of you will be familiar with these I'm sure, classic kit from the early/mid 00s.
Both came to me (from different sources) as 'spares or repair'. In both cases, the initial issues were obvious: loose pulleys on the CD players, and a glass fuse on the main board that has blown as a result of trying to operate the players with said loose pulleys. All easily replaced, and I was hoping they'd be good to go after that.
However, now both units open and close and load discs happily, I'm left with the same issue on both. They steadfastly refuse to spin up or even attempt to read discs. Put a disc in the tray, close it, and where you'd expect there to be the usual CD reading noise, motor spinning round, track number displayed etc - nothing. It's like they don't know the disc is there.
I've tried all the obvious generic things I can think of:
What seems strange is the same issue affecting 2 units (4 players). What I'm hoping is that it's therefore something really obvious that I've done when opening them up to sort the pulleys and fuses. But it beats me what that could be.
Help!
Relative noob here with limited skill, hoping someone can point me in the right direction.
I've recently acquired two Denon DN2000F Mk3 CDJ units. Some of you will be familiar with these I'm sure, classic kit from the early/mid 00s.
Both came to me (from different sources) as 'spares or repair'. In both cases, the initial issues were obvious: loose pulleys on the CD players, and a glass fuse on the main board that has blown as a result of trying to operate the players with said loose pulleys. All easily replaced, and I was hoping they'd be good to go after that.
However, now both units open and close and load discs happily, I'm left with the same issue on both. They steadfastly refuse to spin up or even attempt to read discs. Put a disc in the tray, close it, and where you'd expect there to be the usual CD reading noise, motor spinning round, track number displayed etc - nothing. It's like they don't know the disc is there.
I've tried all the obvious generic things I can think of:
- lenses cleaned
- all moving parts greased
- ribbon cables are fine (swapped with ones from a definitely working unit, just to be sure)
- control units seem to be ok
- no leaky/bulging caps on the main board.
What seems strange is the same issue affecting 2 units (4 players). What I'm hoping is that it's therefore something really obvious that I've done when opening them up to sort the pulleys and fuses. But it beats me what that could be.
Help!
The spindle motor may be of the DC type with brushes and commutator. If these are dirty then the CD spindle motor will not start.
You could try this procedure that has worked for me in the past:
Disconnect both motor wires completely from the circuit board and power the motor directly for a few seconds in each direction from a 9V battery or DC power supply. This will hopefully clean out any contamination from the brushes and commutator.
If this doesn't work then squirt a little contact cleaner into the ventilation holes near the motor connections and repeat.
You could try this procedure that has worked for me in the past:
Disconnect both motor wires completely from the circuit board and power the motor directly for a few seconds in each direction from a 9V battery or DC power supply. This will hopefully clean out any contamination from the brushes and commutator.
If this doesn't work then squirt a little contact cleaner into the ventilation holes near the motor connections and repeat.
Hi again, thanks for the suggestion. I've just had chance to give this a try, motor spinning happily. So I don't think it's that.
Having observed what happened from the inside when I close the drawer, it seems I've got a similar issue to this thread. It just doesn't seem to be sensing when a disc is present. The laser isn't doing anything when the drawer closes, the motor to lift the mechanism up into position to read the disc isn't being triggered. And, as I say, the same issue in 4 different players across two different units. Very odd.
Having observed what happened from the inside when I close the drawer, it seems I've got a similar issue to this thread. It just doesn't seem to be sensing when a disc is present. The laser isn't doing anything when the drawer closes, the motor to lift the mechanism up into position to read the disc isn't being triggered. And, as I say, the same issue in 4 different players across two different units. Very odd.