Hi all, I've got a Mission PCM7000 that has a clock issue (I think). I know there are some models of Marantz and Philips that share circuitry, what models should I be looking for? Was thinking about using the audio board from the Mission with the drive board from whatever I can get. I still think the PCM7000 is a good sounding machine, or should I just bin it?
Thanks..........
Thanks..........
I have a PCMII somewhere which is from the same time and I believe the main pcb is similar to a Marantz CD56 or Philips CD650. Just Google Philips CD650 on Images and you will see photos of the internals.
But what's wrong with it?
My recollection is that these machines have the servo pcb mounted beneath the laser and it is this part which can have problems. The trouble is (being Philips) there are quite a few variations of servo pcb and main pcb.
But what's wrong with it?
My recollection is that these machines have the servo pcb mounted beneath the laser and it is this part which can have problems. The trouble is (being Philips) there are quite a few variations of servo pcb and main pcb.
I believe the nearest players are Magnavox FD1040, McIntosh MCD7000 and Bang & Olusen CDX.
Almost all symptoms one can get with any of these are caused by cracked/cold solder joints on the upper main board(servo & signal proc), ESPECIALLY & infamously the solder "blobs" that are used to connect the bottom side foil traces to the top side groundplane foil. These are easily found from the top side, and should be resoldered from both top & bottom to assure solid through connection. Even better, stick a piece of wire through each hole(while solder is molten or removed) & then re-solder. Then resolder everything on all boards that looks even slightly suspicious.
About the only other thing slightly common on these is wear on the bottom bearing of the platter motor, which can be adjusted to compensate for material loss.
Almost all symptoms one can get with any of these are caused by cracked/cold solder joints on the upper main board(servo & signal proc), ESPECIALLY & infamously the solder "blobs" that are used to connect the bottom side foil traces to the top side groundplane foil. These are easily found from the top side, and should be resoldered from both top & bottom to assure solid through connection. Even better, stick a piece of wire through each hole(while solder is molten or removed) & then re-solder. Then resolder everything on all boards that looks even slightly suspicious.
About the only other thing slightly common on these is wear on the bottom bearing of the platter motor, which can be adjusted to compensate for material loss.
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