Hello, this is not the ordinary problem with CDR's that stop reading one day recordable discs or TOC does not pass etc.
The unit was 100% operating (with it's limitations to regognize only Audio recordable discs of low speed - max 16X)
I just wantred to give it a refresh and replace some capacitors on the main board which is provided as compact with the mechanism.
I replaced some old, general use Nichicons with Sanyo Os con SP and Sanyo SEPC/ similar values -Voltage.
Dissaster!! When re assebled again, all mechanical functions work properly ( read , play, TOC, identify empty CDR's ...but no music on the output and the headphones even at playback of ready burned cd discs, either from analog source. The VU also where not moving , indicating signal upsence. I thought of missconection the PCB plags and dissasembled once again to check solder points of recup and anything other strange. It happens sometimes and almost always I find the end.
After focusing on the solder side of the board I noticed that I had not cut enough the feets of one capacitor, and that damn thing had made holes to the protection sleeve downeeth to the solder PCB side, where it is mounted to the bottom chassis. Probably was shorted there, and I fixed the lenght , check every other point , check power supply , found oK with all voltages at appropriate values, reassembled and Woww.
Audio out came back both while playback of ready burned discs, as also by analog input at recording mode. TOC as always passed for new empty discs . The only problem was that audio level was muted. For recorded or commercial CD's the VU could reach top -30db. Exactly the same when in recording mode, while monitoring the analog input source. The VU readings were in accordance with the level at the headphones that I was hearing , as also to the drive capability the line input of the next amplifier.
I run the self diagnosis tull and after 1 minute flashing "busy" the screen said "passed" which is the normal.
I gave it one more dissasembling to clear the lens, to short all capacitors , both on the board and the power supply, measuring then 0V or a couple of mV on their legs .
Reassembled again to and tried the digital input source. Oughh. What a dissapointment..
Again passes TOC, reads everything and identifies CD recordable but goes crazy with the functions now. The usual problem of muting signal level remains, but now appears serious operating dissruption (by flashing VU's , system stall and all those unbelevable issues)
Playback is not a problem. Goes flawleslly (max -30db level). But while at recording mode and after succesfully passes TOC , hit REC , VUs work , then stall (like old windows blue screen) time counter is stalling too, music keeps audible from input source through headphones , but system is stalled. Tray does not open, stop button doesn't respond. Every function button is freeze. The only oprion is to Power off. When power on the above repeat. I run again
the Self diagnosis , after 20 seconds flasing "busy" , now apears "errror "(??) Not the desired "passed" , neither the reasonable described in manual "service" . It seem to be a control PSU problem..
I would apreciate your advices. If still any.....
regards
Andreas
The unit was 100% operating (with it's limitations to regognize only Audio recordable discs of low speed - max 16X)
I just wantred to give it a refresh and replace some capacitors on the main board which is provided as compact with the mechanism.
I replaced some old, general use Nichicons with Sanyo Os con SP and Sanyo SEPC/ similar values -Voltage.
Dissaster!! When re assebled again, all mechanical functions work properly ( read , play, TOC, identify empty CDR's ...but no music on the output and the headphones even at playback of ready burned cd discs, either from analog source. The VU also where not moving , indicating signal upsence. I thought of missconection the PCB plags and dissasembled once again to check solder points of recup and anything other strange. It happens sometimes and almost always I find the end.
After focusing on the solder side of the board I noticed that I had not cut enough the feets of one capacitor, and that damn thing had made holes to the protection sleeve downeeth to the solder PCB side, where it is mounted to the bottom chassis. Probably was shorted there, and I fixed the lenght , check every other point , check power supply , found oK with all voltages at appropriate values, reassembled and Woww.
Audio out came back both while playback of ready burned discs, as also by analog input at recording mode. TOC as always passed for new empty discs . The only problem was that audio level was muted. For recorded or commercial CD's the VU could reach top -30db. Exactly the same when in recording mode, while monitoring the analog input source. The VU readings were in accordance with the level at the headphones that I was hearing , as also to the drive capability the line input of the next amplifier.
I run the self diagnosis tull and after 1 minute flashing "busy" the screen said "passed" which is the normal.
I gave it one more dissasembling to clear the lens, to short all capacitors , both on the board and the power supply, measuring then 0V or a couple of mV on their legs .
Reassembled again to and tried the digital input source. Oughh. What a dissapointment..
Again passes TOC, reads everything and identifies CD recordable but goes crazy with the functions now. The usual problem of muting signal level remains, but now appears serious operating dissruption (by flashing VU's , system stall and all those unbelevable issues)
Playback is not a problem. Goes flawleslly (max -30db level). But while at recording mode and after succesfully passes TOC , hit REC , VUs work , then stall (like old windows blue screen) time counter is stalling too, music keeps audible from input source through headphones , but system is stalled. Tray does not open, stop button doesn't respond. Every function button is freeze. The only oprion is to Power off. When power on the above repeat. I run again
the Self diagnosis , after 20 seconds flasing "busy" , now apears "errror "(??) Not the desired "passed" , neither the reasonable described in manual "service" . It seem to be a control PSU problem..
I would apreciate your advices. If still any.....
regards
Andreas
You could also post that question on Forum.mfbfreaks.com in the section "Compact disc". It's a Dutch site, don't forget to register first, but many people are willing to answer questions in English.
I'm very sorry for you, and my reply is of no help, but this again proves the old adagio:
do not fix it if it is not broken.
do not fix it if it is not broken.
Were you anti-statted when working on it?
I would look at supplies first. Are they all clean and what they're supposed to be?
P.
I would look at supplies first. Are they all clean and what they're supposed to be?
P.
Thank you all for your replies. The major problem is that Philips have not published the schgematic diagram of the main PCB, which considers as unique part number along with the drive mechanism....
So as, going blind with this.
Hmm,
I seem to remember when I worked for a Philips ASC that all CD Recorders (and Marantz ones as well) had to go back to the manufacturer for repair.
You may be on a hiding to nothing with this machine Andy.
P.
I seem to remember when I worked for a Philips ASC that all CD Recorders (and Marantz ones as well) had to go back to the manufacturer for repair.
You may be on a hiding to nothing with this machine Andy.
P.
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