160

148

0140 5 Jan 68

TTY2 Drops characters on input
when cold. Also garbels

A --> @
D -> nothing

SRR

1230 5 Jan 68

Took machine at 1020 to re-solder
6205's + 6615's.

Investiagted low signal level on
IOB reset. Found that there was
just low signal explained by 15 Ω
resistance of co-ax center conductor
and 100 Ω terminator. Found that
the loading was sufficient for things
to work without terminator. Removed
terminator. The other pulse lines
and terminated signals in the IOB
should be checked when the computer
is up again.

SRR

14:20 5 Jan 68

Looked at DP while computer was down
found R141 in scanner not working right - replaces
some problem so looked some more. Found no
+10 on entire DP. Shut off + stopped since no
data on power supplies.

NSN