19
This is a circuit using temperature characteristics of PH101, and when power is turned on,
high voltage is applied momentarily and current flows. At this time, heat is generated and
temperature rises. With rising temperature, as much as resistance increases and after about
20 seconds, current stops flowing and this circuit stops operating.
6-8
Horizontal/Vertical Processor Section
IC301 (TDA9102C) oscillates with embedded OSC, outputs vertical and horizontal frequency
in free running, and even though SYNC is not supplied from outside, it can operate.
IC301 supplies 12V voltage to Pin 20 to drive it.
With Pin 1 and Pin 2, in free running, horizontal oscillation frequency is determined and
with R313 and C309, free running frequency is determined.
Pin 3 compares and matches SYNC phase input from outside and phase of embedded OSC,
and it performs mainly with R315, C307, C308, R314 and R312, and adjusts DC level with
VR301.
Pin 4, input terminal of horizontal SYNC, is compatible with TTL and always triggers
negative.
KORTEK Corporation
KT-XX03NA