_ DEC-O-LOG for TK50 _ DOL, TK50-R001, TK50 Tape Cartridges OCT 85 IN-PLANT EFFECTIVITY: AUG 85 FIELD EFFECTIVITY: Replace all TK50 Tape Cartridges (P/N 30-20515-01) between Serial Numbers xxx17 xxxx to xxx30 xxxx without a "B" stamped on the bottom. These are DEFECTIVE Cartridges. All Tape Cartridges (P/N 30-20515-01) between Serial Numbers xxx17 xxxx to xxx30 xxxx with a "B" rework stamped on the bottom, and the Cartridges outside the range xxx17 xxxx to xxx30 xxxx are not defective. PROBLEM: The Cartridge leader leaves debris on the read/write head, which results in data errors. QUICK CHECK: If this FCO has been installed, all new Cartridges will have a black leader. The DEC on-site labor charge will be the time required to install and test the FCO at the then current hourly rate. FCO KIT ORDERING: EQ-01372-01: FCO, PARTS FA-04655-01: FCO only _ DOL, TK50-I002, TAPE DRIVE JUL 87 PROBLEM: Intermittent load/unload problems; drive hangs due to operator errors; inability to recover from operator induced failures. FIELD EFFECTIVITY: All TK50 Tape Drives below Revision E1. Drive Revision is on a label attached to the rear of the drive. QUICK CHECK: Installed drive is Revision E1 or above. FCO KIT ORDERING: EQ-01475-01 FCO, PARTS FA-04764-01 FCO only