Sharp MD-DR7 Auvi Silver MDLP Recorder 370 yen Junk or Fixable?

The Sharp MD-DR7 (late 2002), as many of you may know, is one of my favorite Sharp MDLP recorders. It's a great-looking compact recorder and was Sharp's (the world's?) first portable MD recorder with a 1-bit digital amp AKA Sharp's Auvi/Delta Sigma amplifier. To get the maximum benefit you had to use Sharp's included balanced headphones or source your own 3.5mm balanced cable (not common).

I'm a sucker for these quirky Sharps and I won this one on an auction for just 370 yen! It was basically complete except for the charging dock. It came with the remote, AA sidecar, original balanced earphones, and a Sony stereo mic. I had to take a chance on it!

After some quick troubleshooting, the initial issue was clear, but since this is a Sharp, we still need to make sure it plays and records!

Stay tuned until the end, because I have to decide what to do with this thing...

Get the tools you need here:
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Please refer to my blog for more details!

Chapter markers
00:00 - beginning
0:08 - auction listing
0:24 - battery door stuck
1:11 - power testing
1:46 - lots of battery contact cleaning
4:58 - testing - gumstick
7:02 - disassembly - top lid
7:38 - internal cleaning
8:05 - lube
9:57 - reassembly - top lid
11:18 - clean AA sidecar
12:30 - testing - AA sidecar
13:07 - testing - output
14:00 - testing - recording
15:55 - final testing


Blog post:
https://www.technicalinitiative.com/2...

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