Sony Sports Watchman FM-45A composite input

As part of this ‘real Pip Boy’ project I’ve started I decided I needed a real CRT for this to work.  The whole point is to have antique technology, not just the look and Sony made portable CRTs of about the right form factor.  I elected to buy one, but the classic Sony Watchman has a long skinny appearance that I never much liked.  I prefer to have something closer to the dimensions of a Pip Boy to start with, so I found what I thought was the compact model.  It says sport in the name and the ratio of case length to width was more what I liked so I bought one for only $20 shipped.  When I got it I found out my mistake: this isn’t the smallest one, it’s the biggest one.  They apparently called it the ‘sport’ because the whole case is waterproof, and as I disassembled it I tend to agree (they did a really good job designing it).  That being said, I now have a heavy plastic box as big as my forearm and bigger than any of my model Pip Boys, that’ll do.

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The problem with getting something that isn’t what everyone else is hacking means that you have to blaze your own trail.  There isn’t a place to find easy instructions to inject composite video into this particular model so I had to figure it out.  Not really.  Someone else found the same chip in a different one and explained where to hook in.  Pin 8 of the QDIP  IC201 is the composite pin and pin 23 s your ground reference on the Sony CX20183.  But at least now all these keywords are in the same place for the next person.

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I still need to tune the CRT, inject audio into the existing amplifier circuit, maybe remove some RF components for space, make sure the radio still works, add a rechargeable lithium pack to run the monitor and pi, and add more sensors/buttons/knobs/lights.  The keyboard is done.

2 Responses to “Sony Sports Watchman FM-45A composite input”

  1. 31337 Says:

    Did you manage to figure out the right pin to inject also the audio?

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