Model: IC-275 Bulletin: B1004 Subject: Prevention of PLL unlock at 174 MHz 1. Remove and replace the following components on the PLL Board Original New Part Value Value R130 120 Ohm 270 Ohm R131 47 Ohm 18 Ohm R132 120 Ohm 270 Ohm C42 60 pf 50V 30 pf 50V C47 43 pf 50V 62 pf 50V