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1st March 2010, 11:08 AM
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#1 |
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diyAudio Member
Join Date: Mar 2010
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CD-Pro2LF, problems with display
Hi everyone!
I assembled a kit with display of this type display pcb for CD-Pro2LF. The problem is that display is not turning on while the laser pick up is working well and fully contrlolled via handset. Power supply for display is -21V, -18,5V and +5V via LM317 and LM337 regulators. The strange detail is that negative voltage is the same (-21V) on two input contacts while supply is -18 and -21V. When negative voltage is off, on contacts is +5V. Display controller diagramm is attached Please help with advises. I am more experienced with tube designs) |
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