91

Feb. 6, 1968

We apparently have two bad balun boards. One
(dated 2/5/68) says "SECT 4 Loses." The other (dated 2/6/68)
says "SECTION 13 loses." I checked all of the diodes, balun
transofmers, and termination resistors on both boards. The
board labeled "SECTION 4 LOSES" had an open eyelet on
pin 1 (which connects to Sect. 4). This has been resold
and tested with a meter. It still must be tested
on the machine. I couldn't find anything wrong with the
board labeled "SECTION 13 loses"; but I noticed that its
contacts have not been erased. We'll have to find out
what "SECTION 13 loses" means before we can look further for the
trouble.

J. Gleason

1630 6 FEB 68

ALL DATAPHONES & TWX interaces
don't work on REMOTE → COMPUTE
TWX [originals?] get to output of 4504
but not into the 630 line scanner
Local TTY's still work.

?

SRR

1700 6 Feb 68

Replaced [Y?] sink driver in
AMP 1 Mag Module G JG. It had not
been touched since Sat night. The
final version of the bug was that no
locations in MAG MOD G didn't
[shook?] Deposit of all 1's gave
back almost all zero's. Current
[?]forms looked fine.

SRR