Where to buy remote control device for technics SA-DX850

SOURCE: remote control

I have heard the phillips makes one... Philips Pronto TS-1000

SOURCE: Problem with Technics SA-DX850

SA-DX750 (sister Model to SA-DX850). Showing error code F70, after a few minutes running. Checking the power rails revealed +5VA and +5VD, on the Digital Circuit Board 'A', dropping to about 2V, when fault occured. F5, T1A, on the Sub-Transformer Circuit 'M', was subject to occasional blowing. The problem was traced to an intermittent break, in the printed circuit board conductor, in the vicinity of Q1702 (+5VD regulator) collector, on the Digital Circuit Board 'A'.. Repairing this cured the problem. Note that removing F5 (above), or disconnecting CN702, CN1000A or CN904B, on the Digital Circuit board 'A', also causes this error code to be displayed. Failure of the audio output ICs, IC651 & IC801, is apparently the usual reason for this error code being dsiplayed, but it is worth checking the power rails viz. +/- 25V (Fuses F3 & F4, T6.3A, on Sub-Transformer Circuit 'M') +/- 55V, +/- 14V etc.

SOURCE: what is the model no. original remote control for

Dear Sir,
The original remote control model number for your equipment is
EUR647132. But this item is no longer available.You can find a substitute which will work effectively for your equipment(having the same features) are: EUR646489 and EUR646496 These remote can be purchased from panasonic.newremotecontrol.com I think this may solve your problem.
Regards, Chandrachur