_ DEC-O-LOG for KA410-AA

_ DOL, KA410-AA-I001, MVAX 2000 Data Sync. Loss, OCT 89

PROBLEM: MicroVAX 2000 systems which utilize the SLU (DZ) ports in
applications which require data transmission on multiple lines at high
speeds may experience the loss of data synchronization with the result
being seen on a terminal or console as garbled characters.  The system
will require a power cycle reboot to correct the sisuation and return
use of the terminal and/or console.  Reducing the baud rate has
lessened the frequency at which the problem may occur.

FIELD EFFECTIVITY: MicroVAX 2000 Systems experiencing the symptoms
described in the Problem section.

QUICK CHECK: Step 1 - Check the version of the YEDRIVER.EXE file by
doing  ANALYZE/RMS. The CREATION DATE must be 21-MAR-1988 or later.
Any revision prior  to this must be updated. **Important**Proceed to
the next step if this step  has not corrected the problem. Step 2 -
MicroVAX 2000 CPU module  (p/n 70-24268-01) at revision F1 or higher. 
There should be a sticker on the  non-component side of the module
depicting the 70 class number and the module  revision. The revision
of the T1034 should be K3, K4 or K5.                


FCO KIT ORDERING:
EQ-01556-01 FCO, Parts
FA-04866-01 FA Document