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KX-G8300
2) Trigger Circuit
Circuit Operation:
3) DC-DC Converter
Circuit Operation:
This circuit generates the DC high voltages (300V) for the modulator and the DC power supply for the
hearter of magnetron.
It consists of the switching regulator control IC circuit (IC801), switching circuit
(Q804), transformer (T802), and rectifier circuit (D811 ~ D813).
The 300V output DC voltage of the rectifier circuit is sent to thé modulator circuit via the charging choke
(L810).
The DC power for the magnetron heater passes through the choke coil (L805) and secondary windings of
the pulse transformer (T801), and is used to heat up the magnetron heater.
Dsio
Teo2
De!
Eso7,
Heater (6.3V)
Leos
Cc
+
+
822 I]
Wy
Dsi3
= Leog
C823
*
+
Cee4 YL
C825 11
Rai
Q.22/1W
Ceog
+12V
-12V
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