File:Technics RS-B605 Dolby HX Pro circuitry.jpg

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Captions

Captions

Inside the Technics RS-B605 cassette deck (1988-1989 model year)

Summary

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Description
English: Inside the Technics RS-B605 cassette deck (1988-1989 model year).
The Dolby HX Pro is built around the NEC uPC1297 IC (bottom center) which drives two push-pull bias transformers (left and right of the IC). The circuit operated two channels in stereo, although not exactly independently - as specified by Dolby. Curiously, there is no double-D licensing mark on the IC. The third transformer (top, just right of centerline) is for the main output of the erase/bias generator.
Русский: Внутри кассетной деки Technics RS-B605 (1988-1989 годы). Динамическое шумоподавление HX Pro реализовано на ИС NEC uPC1297. Слева и справа от неё - два трансформатора, посредством которых микросхема вливает ток подмагничивания в цепь головки записи. Над ними - трансформатор генератора стирания и подмагничивания, сигнал с которого подаётся на uPC1297.
Date
Source Own work
Author Retired electrician

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current18:25, 1 December 2021Thumbnail for version as of 18:25, 1 December 20212,000 × 2,000 (835 KB)Retired electrician (talk | contribs)Uploaded own work with UploadWizard

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