Tinkering CD Players & Digital Audio
This CD 100 is still not working after severeal repair attempts by others , If i could have a look. First check LM317 for +5 volt gets very hot. LM337 for -18 volts gets...
Problem Found , bad Capicitors and the LM337 for -18 Volt was Faulty, it was only -12 with ripple causing the hum Audio without distortion : Playing audio...
Bought a defective second-hand CD 303 myself 😉 Nice Dust pattern Weird problems ?! Found a broken trace 😉 , no -12volt on LM324
CD 100 repair repaired , Problem : Clicking, Skipping, Interruptions, etc. No Audio Some nicotine Sub. 29515 88 bis ?? Early version CD 100/00 servo processor MAB8420 C006 and a Mercury Time Counter...
Philips CD 880J , Slipping sound when spindle motor starts , causing TOC reading failure no light emitting strips , like CD880 Early version of CD 880 board Firmware P 201 TDA1541A...
Smooth Lock-In of Servo Control When Switched On An apparatus for playing optical discs is described, in which for a smoother locking-in of the focus servo control the focussing error signal is initially derived...
Apparatus for enabling an autotrack circuit of an optical disc reading apparatus during the positioning of a read beam Description The invention relates to an apparatus for reading a disc-shaped record carrier in which...
CD 303 , won’t play discs , interconnect board Already added cinch chassis connectors There has been done a lot of resoldering already Won’t read discs, output Reed-relais...
CD 204 Tracking Problems and Skipping Audio , asked to repair and refubisched this player Okay , What happend here…?? Found the root cause screaming servo 🙂 and the tracking...
