_ DEC-O-LOG for TA78

_ DOL, TA78-I-001, TA78 FUSE FEB 86

PROBLEM: Fuse replacement.
         NOTE: Recommended for Depot installation only. 

QUICK CHECK: Second fuse holder mounted in power pack contains
F9 thru F14. 


The DEC on-site labor charge will be the time required to install and 
test the FCO at the current hourly rate.


FCO KIT ORDERING:
EQ-01395-01  FCO, PARTS
FA-04676-01  FCO only


_ DOL, TA78-I002, TA78 CARTRIDGE FEB 86

PROBLEM: None 


QUICK CHECK:  Presence of an external seal placed around the lower 
Cartridge Restraint Air Inlet Hole.


The DEC on-site labor charge will be the time required to install and 
test the FCO at the current hourly rate.


FCO KIT ORDERING:
EQ-01399-01  FCO, PARTS
FA-04684-01  FCO only


_ DOL, TA78-I003, TAPE DRIVE OCT 86

PROBLEM: 1. Data Security Erase (DSE) hangs after TS78 goes
available. 2. Read Reverse Retry fails. 3. Initilization of
blank tapes fails. 

FIELD EFFECTIVITY: Rework all TA78's not at REV 4. 

QUICK CHECK: Issue a "SHOW ROMS" at the ASCII port. ROMS
0 through 4 should be at REV 4. 


FCO KIT ORDERING:
EQ-01419-01  FCO, PARTS
FA-04704-01  FCO only


_ DOL, TA78-I004, Tape Drive, APR 87

PROBLEM: Excessive soft errors while writing tapes in GCR,
and the inability to read tapes written on another tape
drive.     

FIELD EFFECTIVITY: All TA78s not at Rev "H" which do not have
this FCO installed and experiencing problems with GCR Write, tape
interchangeability and other errors.  This FCO implements the
following ECOs:  M8950-SH009, M8950-SH010, TU78-SH034, TU78-SH036,
TU78-SH037.     

QUICK CHECK: Label on the inside of the front door, and the Preamp
module has a shield.

     This revised FCO supersedes Rev. B released 30 July 1987.
     It has been revised to correct errors in the text on pages
     3, 4, 11, 12, 15, 16, 17.     


        
FCO KIT ORDERING:
EQ-01455-01  FCO, PARTS
FA-04741-01  FCO only