STUDIO REPAIR - Lexicon PCM 70 - Topology

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▪ Device:		Lexicon PCM 70
▪ Topic:		Topology
▪ Abstract:		…
▪ Creator:		Image by Nikolaus Riehm
▪ Website:		studiorepair.com
▪ Editor:		Nikolaus Riehm

STUDIO REPAIR » Lexicon » PCM 70 - Multi Effects » Topology

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Lexicon PCM 70 • Topology

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Lexicon PCM 70 - Opened * …

Lexicon PCM 70 - Display * …

Lexicon PCM 70 - Romantic * A quite romantic view of the PCM 70 main board…

Lexicon PCM 70 - Mainboard * Component side of the large PCM 70 mainboard. It consists of two Z80 CPUs accompanied by three specialized Lexicon high speed processors - they do the number crunching for the audio process algorithms.

Lexicon PCM 70 - Mainboard * Solder side of the PCM 70 main printed circuit board.

Lexicon PCM 70 - Display Reverse * A vacuum fluorescent display (VFD)

Lexicon PCM 70 - Topology * …

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Lexicon PCM 70 - Topology - Image by

Lexicon PCM 70 - LexiChips * The two LexiChips inside the PCM 70 - this is the place where Lexicon's algorithms are forged into silicon…

Lexicon PCM 70 - Memory * Memory management unit with 128 kilobytes of dynamic RAM (organized in 64k x 16bit).

Lexicon PCM 70 - Master CPU * Z80 CPU, 6402 UART, RAM

Lexicon PCM 70 - Slave Processor * Z80 CPU accompanied by 16kB static RAM

Lexicon PCM 70 - A/D Converter * …

Lexicon PCM 70 - D/A Converter * Burr Brown PCM53

Lexicon PCM 70 - Analog Circuitry * …

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