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Most of the following tests are concerned with components to outside circuitry, so improper voltages on these pins, if ex-
connected to ICl. If, at any point, there is a performance ternal pads are good. suggest
replacement
of
the IC:PINS 2,
problem and all external components check good, recheck 3,4,6,8,13,17.18,19,20.
the
DC
voltages
on
IC1
The following pins are all AC coupled
IIA. AUDIO PLAYBACK
I I B
AUDIO RECORD