SB-895 TS-430S PLL Unlock at High Temperatures (Revision) 9-14-85 This service bulletin supercedes bulletin 891, which concerned low input level to IC-16 as the radio warmed up. This bulletin incorporates information contained in Bulletin 891 plus additional information. PROCEDURE: On the Control Unit (X53-1290-XX) Check transistor Q8. If it is not a 2SC1815Y change it to this type (Serial numbers 408XXXX-509XXXX). For serial numbers before 408XXXX change R29 to 820 ohms and C41 to 100 pF. In addition to the changes listed above check for the following signals: (You must check these at a dial frequency of exactly 14.000.000 MHz) TP-1 6.0v (L18 adjusts) TP-2 70 MHz TP-3 45.3 MHz TP-4 6.35v (L10 adjusts) Time required for this modification is 1 hour or less. CLM (c) 121589TKC