FIX Innostor AND PHISON 64PIN Hardware Problem

IN Innostor FAMILY

IN PHISON USB3 64PIN 2251-03-Q ,2251-07-6

HI again
too many people have Innostor flash memory
and so many people emailed to me and have this problem

some ic «eml3020» is crashed and usb is not worked

eml3020 is dc to dc convertor

Innostor like a very old flash havent inside voltage convertor

as we know nand flash used 3.3 volt
but usb voltage is 5 volt

some flash like 2251-50 or other have dc to dc convertor but Innostor used em3020 to create 3.3 volt

— ok

lets test rule

use multi meter
1-is 5 volt fuse safe? ok go to next level
not ok > change fuse

2-Between DP AND DM must multi meter show (900-1700 ohm )
if not show change dp and dm fuse

3-test L1(Fuse)

4-output eml3020 is 3.3 volt?

if not

try find on old flash memory have 5 to 3.3 volt convertor