02-28-2022, 09:39 AM
Yup, appears after a certain revision they switched to this board that as the Note section in the "5.25 jumpers.pdf" on the site, States the following with the first sentence being the critical one!!!
Note: Jumpers EX, GX, DD and TH have been removed from drive JU-475-5 C08 starting from this drive’s level
03 (March, ’94). To set the disk change mode 2 on this drive (as used on L1 with GO280D, FP1 fw2.4, FP4
fw3.7), solder a 15 Khom resistor at R18. The JU-475-5 C20 drive will no longer be available from March,
1994; instead, you can use drive JU-475-5 C08 by inserting jumper BX.
Since I didn't do my due diligence, I went by all JU-475-5 had a similar board with EX and GX jumpers. Lesson learned...
Note: Jumpers EX, GX, DD and TH have been removed from drive JU-475-5 C08 starting from this drive’s level
03 (March, ’94). To set the disk change mode 2 on this drive (as used on L1 with GO280D, FP1 fw2.4, FP4
fw3.7), solder a 15 Khom resistor at R18. The JU-475-5 C20 drive will no longer be available from March,
1994; instead, you can use drive JU-475-5 C08 by inserting jumper BX.
Since I didn't do my due diligence, I went by all JU-475-5 had a similar board with EX and GX jumpers. Lesson learned...