10. Model : OK55, OK75
Main PCB : EAX67851701
ECO NO : EKNJ400042
Change Details : R5B3, R5B39 : 0RJ4701C678(4.7KΩ, 1005, 5%, 1/16W) → 0RJ4700C678(470Ω, 1005, 5%, 1/16W)
* It should support only the model that produced before 2019.4.8
Page 12
EAX67851701 Main PCB (The Bottom surface)
Check the chip resister value
with Multi tester
After checking R5B3 or R5B39 resister value
-If it is about 4.7KΩ, Change Main board
-If it is about 470Ω,
We don’t need to change Main board
Service Bulletin
Product : Mini / Onebody / Louder
Bulletin # :
PNZ201900013-01
Release Date : 2019.08.22
