85

2045 3 Feb 68

D Poole replaced "MSI" unit on
stack decoder card in AMP 1
Mag Mod G Formerly J6, now J6

all addresses selected by the switch
now drop bits. Trouble moves with
card.

Tried replacing the "MSI" just replaced
Trouble remained. Checked all
contacts with ohmeter. no
obvious troubles. Observed that
Read current waveform is poor & low

Good [diagram] obseved [diagram]

Tried replacing other "MSI" - Trouble
got worse. Now no location in
that Magnetic module will work.

Had a mild interlude with the
"resetting" but. One symptom:

NON ex men - Reset both AMP's
reset interface. Deposit in

3400031 Both AMPs say

VA and get no data or command (RW etc)
AMP 0 gets MA = 1
Interface says R/W, WA CONT.
Reset Interf & it worked