One friend from Head-fi sent me a Toshiba XR-P21 for repair. It’s an vintage portable cd player made around 1988, comes with a power supply base and looks cute. However, it has no response when it is plugged in and pressed play. It’s a challenge for me because the famous three models of XR...

which one you like?                                              

SONY: MODEL     OPT HEAD  RF AMP  SERVER      CPU         DRIVER      DSP        DIGITAL FILTER     DAC       AUDIO AMP D11/12/22    KSS220   CXA1271   CXA1272    CXP5024   MPC1715  CXD1130/CXD1246               CXD1161    BA3570 MEGA BASS+M51568 D101            KSS330   CXA1271   CXA1272  ...

I have researched most of vintage portable cd players made by Sony, Panasonic, Philips, Denon, Aiwa, Citizen, Toshiba and Kenwood. I will replay any technical question about the following models: Sony: D50 D50MKII D55T D100 D150 D250 D350 D303 D555 D99 D90 D3 D2 D2T D66 D34 D33 D121...