Philips pm3232 - Page 33

75
3.1.
8.3.
Illumination
circuit
The
graticule
of
the
c.r.t. can be
illuminated by
means
of bulbs LA1
and LA2.
The
intensity
can be
varied
with
the
aid of
ILLUM
potentiometer R8
which
controls the
collector
current
(which is the
current
through the
bulbs)
of transistor
TS802. The
illumination
circuit
is not short-circuit
proof.