My mcd 204 still doesn't recognize discs after having changed the laser pickup today
I guess it is the board that controls the laser, as suggested by the importer's technician by phone.
Board would cost me a lot if bought from importer's warehouse, so I ask myself if there are other sources for this as it is a chinese product, or if there is something to try to repair it.
I guess it is the board that controls the laser, as suggested by the importer's technician by phone.
Board would cost me a lot if bought from importer's warehouse, so I ask myself if there are other sources for this as it is a chinese product, or if there is something to try to repair it.
An externally hosted image should be here but it was not working when we last tested it.
Does the laser diode light ? and does it try and focus ?
Always worth checking supplies. Does the lens move severely in any one direction at power on ? which might suggest a coil drive amplifier problem.
Could be a tough one to crack unless you get lucky. I'm assuming there is no static link to remove on the new pickup.
Always worth checking supplies. Does the lens move severely in any one direction at power on ? which might suggest a coil drive amplifier problem.
Could be a tough one to crack unless you get lucky. I'm assuming there is no static link to remove on the new pickup.
I installed the new pickup being statically discharged (feet touching steel).
I cleaned the soldering ball using a statically discharged iron (touched steel) and no remains of teh ball are visible, circuit is apaprent.
The diode lightens up (observed at a safe angle, the red laser can be seen well through the cd structure).
Cd is received, spins twice but the result is a no cd in tray writing on display.
Ty
No easy answers to this one I'm afraid. When I mentioned 'static link' I was referring to a shorting link across the laser, the fact it lights means this pickup would not have had that anyway.
Unless you can find something obvious on the main PCB (faulty regulator or transistor) then it unfortunately looks like you would have to do as the technician suggests and obtain a board.
Unless you can find something obvious on the main PCB (faulty regulator or transistor) then it unfortunately looks like you would have to do as the technician suggests and obtain a board.
ok, ty. It is a very musical sounding player, dac section gives a realistic analogue like feeling, so it is worth repairing.
tecnician told me that many of such boards resulted to be faulty, he was sure it wasn't pickup.
I wonder if I could try to use it as a pure dac but I lack knowledge to find signal path etc.
For sure will try to see if some component is faulty
It sounds like the manufacturer is aware of some stock fault from what you say, something more involved than just a discrete part.
Its very rare for the VLSi chips (the big ones 🙂) to have stock defects but I suppose it could happen. The one at the lower right looks like a drive amplifier (motors and pickup coils maybe). If that ran hot then it could be a suspect.
It looks like you will have to take the techs advice on this one though 🙁
Its very rare for the VLSi chips (the big ones 🙂) to have stock defects but I suppose it could happen. The one at the lower right looks like a drive amplifier (motors and pickup coils maybe). If that ran hot then it could be a suspect.
It looks like you will have to take the techs advice on this one though 🙁
Spot on, he told me so: "the boards of 204 fail here, we have had many .." this put me off since it is not very serious to put on the market faulty stuff without extending guarantee to that particular part.
They should at least make such parts available at a reasonable cost
ty
......and yet he didn't say what the failed part was.
It is annoying when this happens... and you hope the manufacturers acknowledge the issue by having a plan to fix the affected items free of charge.
I don't know how old these are but perhaps you have consumer laws that might help were you to pursue it.
It is annoying when this happens... and you hope the manufacturers acknowledge the issue by having a plan to fix the affected items free of charge.
I don't know how old these are but perhaps you have consumer laws that might help were you to pursue it.
Hello, I have an Advance Acoustic MCD-204 CD player. His problem is that when he presses the POWER button he no longer enters the start sequence, display is dead (does not display anything) and does not take any command (PLAY, NEXT/PREVIOUS, EJECT, etc). The lamps inside become incandescent which makes me think that the audio part is powered but the control and display part does not work. Do you have any idea what the problem is? Thanks!