
Roland U-220 v1.02
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1MB (128K x 8-bit) UV EPROM

Original v1.01 Roland factory EPROM at location IC#8 was P/N: HN27C101G-20 (200ns Access)

Burned a new v1.02 EPROM using P/N: HN27C101AG-10 (100ns Access)
   (Purchased from vendor UTSource on eBay - https://www.ebay.com/str/utsourcestore)

The UV erase time I used prior to burning was 15 minutes


