hello,I have problem with philips cd930,dont work servo,in display no info but it light,buttons dont work.I think that servo have no voltage .laser read disk.
I need service manual or need help.thanks.
I need service manual or need help.thanks.
problem is in display board,I have other philips cd930 and conect, display board for it no result,replace some trasistors no result,
buttons dont work, display show "...............................",with remote controler player work ok.display no.
buttons dont work, display show "...............................",with remote controler player work ok.display no.
Hi,
I've worked on a CD940 a bit, but only on the main board. I don;t have any schematics for the display (mainly because I think this is the main bit they change to differentiate between models).
can you trace the voltages going into the display board and see if there are any anomalies?
When you used the display from a different CDP, did you use its ribbon cable, or the ribbon cable from the faulty player?
Not being familiar with the board, that's what I'd do first.
Cheers,
Phil
I've worked on a CD940 a bit, but only on the main board. I don;t have any schematics for the display (mainly because I think this is the main bit they change to differentiate between models).
can you trace the voltages going into the display board and see if there are any anomalies?
When you used the display from a different CDP, did you use its ribbon cable, or the ribbon cable from the faulty player?
Not being familiar with the board, that's what I'd do first.
Cheers,
Phil
I conect other display board in this philips cd and it is ok,problem in display board,I replace all transistors but no result.I find different voltages (for two boards) on some resistors,but I dont know what to do,bad display board procesor?but remote control work.I dont know this procesor is for buttons and remote or no,I can replace him,it is toshiba ,I have it. help me.thanks.
Yes, it is a VFD, or vacuum tube display.
It is quite plausible that the display module is broken, but the rest of the circuitry is still fine (including IR).
I assume the keys on the front panel also work?
Cheers,
Phil
It is quite plausible that the display module is broken, but the rest of the circuitry is still fine (including IR).
I assume the keys on the front panel also work?
Cheers,
Phil
I replace all keys,I think that procesor is bad or it havent signal or voltage,I think to change procesor,but I waiting for service manual,perhaps proc is good.I think that problem in proc,because buttons dont work,procesor have voltage because show".............".
Processors can of course fail, but I'd be surprised. Unless there is a firmware issue, a processor will either work or no at all. Considering the IR is working (unless that isn't serviced by the processor) I think the processor is okay.
thanks.this problem began when I "play" with transformator,when cd was power on ,was bad contact in transformators socket,it is for display power(display no work) supply,when I conenct contact began this problem.display has power supply "......................",but something happening in display board.
Oh dear. Playing with the mains on is never a good idea.
Sounds like you've done some damage.
I don't quite know what to recommend. Double checking voltages is a good start, which I believe you've done.
The VFD itself may well be requiring a higher voltage, maybe 18v, whereas the rest of the circuit should be 5 or 3.3v.
Is the display completely dead? Or does it just display "......", as you quoted ?
Or, maybe find another CD930/940/950 for the front panel. Maybe there's a faulty one on Ebay or something? Most likely the transport would go first, leaving the rest in good condition, of which you could use the front panel.
Sounds like you've done some damage.
I don't quite know what to recommend. Double checking voltages is a good start, which I believe you've done.
The VFD itself may well be requiring a higher voltage, maybe 18v, whereas the rest of the circuit should be 5 or 3.3v.
Is the display completely dead? Or does it just display "......", as you quoted ?
Or, maybe find another CD930/940/950 for the front panel. Maybe there's a faulty one on Ebay or something? Most likely the transport would go first, leaving the rest in good condition, of which you could use the front panel.
display no dead switch "................." ,problem no display,another cd I? No its no intresting,I have three players and this i want to upgrade.I think that I will find problem,thanks.
Its okay,cd930 work,I get service manual and no find VFTD voltage on display proc out,replace proc and its ok. thanks for all.
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