Hello,
I've bought a faulty Philips cd304 to try to repair, but no luck so far.
The player starts up but won't read discs. Usually, the laser swing arm moves to the innermost position, tries to focus, the laser emits light, but the turntable motor doesn't move.
Sometimes when I turn it up the display just lights up all the lights and sometimes the swingarm moves to the out position and the motor spins, without any disc.
I've soldered the wire through all griplets, changed all the 33mF electrolytics on laser board and servo board, cleaned and lubed spindle and swingarm bearings, checked all the voltages from the power supply, tried adjusting the turntable height, the usual stuff I've found information about, still nothing.
I'm not sure what to do next, I didn't touch the power supply board because the voltages were ok, but maybe I should replace all the caps there?
Anyway, I'm new at repairing cd players and trying to learn, any suggestion on what to look for next would be greatly appreciated.
I've bought a faulty Philips cd304 to try to repair, but no luck so far.
The player starts up but won't read discs. Usually, the laser swing arm moves to the innermost position, tries to focus, the laser emits light, but the turntable motor doesn't move.
Sometimes when I turn it up the display just lights up all the lights and sometimes the swingarm moves to the out position and the motor spins, without any disc.
I've soldered the wire through all griplets, changed all the 33mF electrolytics on laser board and servo board, cleaned and lubed spindle and swingarm bearings, checked all the voltages from the power supply, tried adjusting the turntable height, the usual stuff I've found information about, still nothing.
I'm not sure what to do next, I didn't touch the power supply board because the voltages were ok, but maybe I should replace all the caps there?
Anyway, I'm new at repairing cd players and trying to learn, any suggestion on what to look for next would be greatly appreciated.
Hi Pano, thanks. Well, that's what happens when you bully cool knowlegable people out of forums.
Guess I'll have to do it the old fashion way, with beer, trial and error. And keep it monologue.
Guess I'll have to do it the old fashion way, with beer, trial and error. And keep it monologue.
Yes I did. There was also a broken potentiometer which I repaired.
I didn't replace the 47uF bipolar cap on servo board, not sure if I can find the right value.
I didn't replace the 47uF bipolar cap on servo board, not sure if I can find the right value.
Regarding the spindle motor, replace the 56nF in the feedback loop with 100nF. Pretty sure this isn't the only problem here but it shoud at least help you further down the road.
Replace that 68u cap in the display assembly as well:
Check the HF cable from the CD board to the Decoder board (2 ping shielded cable).
Have you checked the solid aluminium electrolytics to not touch the ground plane?
Do you know nanocamps great homepage? use google translate...
https://nanocamp.de/?bugs-cd104-cd304
Replace that 68u cap in the display assembly as well:
Check the HF cable from the CD board to the Decoder board (2 ping shielded cable).
Have you checked the solid aluminium electrolytics to not touch the ground plane?
Do you know nanocamps great homepage? use google translate...
https://nanocamp.de/?bugs-cd104-cd304
Thanks,
The service manual I've got (in german) looks different:
Are those 33nF here (2216,2218)?
I've cleaned all the cable connections, I will check the HF cable again.
Yes, I've soldered those caps 1 mm higher, though I wonder if I might have damaged them with heat, it took some wrestle to get them up.
Yes, I've studied that site.
Some of my other concerns might be the angle of the radial motor, since it seems like someone has been messsing with those two screws. And power supply caps, people usually replace them first?
The service manual I've got (in german) looks different:
Are those 33nF here (2216,2218)?
I've cleaned all the cable connections, I will check the HF cable again.
Yes, I've soldered those caps 1 mm higher, though I wonder if I might have damaged them with heat, it took some wrestle to get them up.
Yes, I've studied that site.
Some of my other concerns might be the angle of the radial motor, since it seems like someone has been messsing with those two screws. And power supply caps, people usually replace them first?
If I'm not mistaken, the 304 has either the CDM-0 or the CDM-1 drive. Perhaps worth going through service manuals: https://drive.google.com/drive/folders/1BH3zEVeWraXb4EWzgRPRdnN3uBWIj9SS?usp=sharing
Thanks borchee, those are much better resolution than what I had.
I can now see that weissi was refereing to the smd caps on motor board, I was looking at servo board.
I think 304 used only CDM-1.
I can now see that weissi was refereing to the smd caps on motor board, I was looking at servo board.
I think 304 used only CDM-1.
Can you post some pictures what did you change. I repaired 2x304, 304mk2, 104, and some other philips bang and olufsen ... manly capacitors, grimlets, bad connector conntacts, tantalum problems...
Go trought this steps maybe you missed some caps and some more things
https://nanocamp.de/12-revision/philips-cd304-revision-manual.pdf
and cdm-1
https://dindiki.com/?cdm1-laser-service
Go trought this steps maybe you missed some caps and some more things
https://nanocamp.de/12-revision/philips-cd304-revision-manual.pdf
and cdm-1
https://dindiki.com/?cdm1-laser-service
Ok, there's a written note that says 'motor not starting fit 100nf across pins 1+2 and 6+7 on ic 6081', as weissi said. Would wima mkt 100nf/63v work here?
should I remove the original smd ones?
@huggygood beautiful.
@androa76 the lighting's not great here, but here you go, as I said, I replaced all 33uF on laser and servo board with panasonic fc, and also one 47uF on servo board with big rubicon 200v, as I had that.
should I remove the original smd ones?
@huggygood beautiful.
@androa76 the lighting's not great here, but here you go, as I said, I replaced all 33uF on laser and servo board with panasonic fc, and also one 47uF on servo board with big rubicon 200v, as I had that.
Attachments
@androa76 Didn't know that, thanks.
@everyone I have been given enough information, I have a lot to do, will post my findings.
@Mister Audio I don't like anything new that costs less than $2.6 million, and to have that money I would have to work and not have time to listen to loud rock'n'roll music from frets.
@everyone I have been given enough information, I have a lot to do, will post my findings.
@Mister Audio I don't like anything new that costs less than $2.6 million, and to have that money I would have to work and not have time to listen to loud rock'n'roll music from frets.