165

0005 9 Mar 67

MAG TAPE seems to be giving trouble
3.15/02 -/05 & -/09 all have trouble
reading FAILSAFE types. The MAGTAPE
diagnostics MAGTST and 516/545 test
both have no problems with scratch
tapes. We have not yet tried the
tapes in question on write because we
still hope to get the data back.

The way the system behaves suggests
that possibly the motion control delays
are mildly maladjusted in a way that
shows up only under FAILSAFE's particular
timing.
DOOM
SRR

0500 7 Mar 68

H.V. Has gone again in Q.I.
I suspect to transfomer again.

LOU

0900

Have replaced the red clip lead on the 166
between 1J11-L and 2L8-K (with a green wire).

Have run margins on the 166 using T.S. Main.
Two-thirds of the way thru the tests it was discovered
that the test program changed sometime earlier. The
program was reloaded and the margins were repeated
on Bay 2 of the 166, but not Bay 1. The margins
recorded for Bay 1 are believed to be incorrect, so
they should be repeated next Thursday.