Machines and Accessories No. 99-08=20
Date: June 25, 1999
Subject: C-1 Machine Amplifier Boards
__Problem:__ Capacitor C8 (.0082=E6F) on the amplifier board is
a =F120 percent capacitor located in the frequency response
circuit of integrated circuit U2. Some capacitors may be at the=20
low end of the 20 percent range. This situation=20
can prevent the board from meeting the required frequency
response specifications. Broad tolerance C8s may be found in
parts previously supplied by NLS to the field. This component
is a large yellow ceramic disk capacitor. Labeling on the
component varies.
__Solution:__NLS has begun purchasing and is currently
stocking capacitor C8s in the =F15 percent tolerance range. =20
All existing stocks of the =F120 percent capacitors should be replaced=20
with the =F15 percent capacitors. Please contact the EMMC for ordering=20
information.
__Comments:__ Replacing the broad-tolerance component with a
narrow-tolerance capacitor should reduce repair-time activity
and recidivism on these boards.
For further information contact:=20
Kevin L. Buck
Equipment and Materials Maintenance =20
Coordinator
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