_ DEC-O-LOG for MS630-BB _ DOL, MS630-BB-R001, MS630-BB Memory Module APR 86 PROBLEM: System crashes of the type "Machine Check 80, 81, 82 or 83." FIELD EFFECTIVITY: Retrofit CPU module M7606-AH and/or memory modules M7607-AH, M7608-AH/-BH, present in MicroVAX II and VAXStation II systems running Ultrix 32m and UNIX derivatives; MicroVAX II and VAXStation II systems running MicroVMS ONLY AS SYMPTOMS OCCUR. This FCO implements ECO M7608-ML003. QUICK CHECK: Presence of M7606-AH variant CPU module and/or memory module(s) M7607/M7607-AH/-BH variant. This revised FCO supersedes the original release dated 14 April 1986. It has been revised to correct a documentation error in Table 1 on page 5 of the FCO document. FCO KIT ORDERING: EQ-01359-02 FCO, PARTS FA-04640-02 FCO only