HP 9895A Part 2: Epic Controller Board Repair (and a transparent chip surprise)

curiousmarc Oi9qom

We restore more HP 9895A dual 8″ diskette HP-IB drives, but these will be way more challenging. We’ll need a full on logic analyzer assisted repair to debug a really, really nasty fault. It’s a long video, but don’t miss the intermission where Master Ken inspects a transparent silicon-on-sapphire chip! …

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From: Retro Roundup