9-15
2. HIGH VOLTAGE CIRCUIT
2-1 Outline
This circuit also employs chopper regulator to keep high
voltage constant in spite of frequency change.
But FBT itself is basically the same as that of TV set, and
employs the Harmonic Non-Resonate System.
Operational theory and configulation are the same as those of
regulator which is described in Deflection Circuit above.
Therefore, the explanation is omitted here.
Error amp consists of pins 1 to 3 of ope. amp IC407. Pins 5
to 7 are the buffer amp to detect high voltage from FBT. High
voltage can be adjusted by rotating variable resistor R451.
C406 is used to adjust amount of ripple element of high
voltage to detect.
Fig. 19
.
CHOPPER REGULATOR
FOR HV CONTROL
QH24
To Next Page
Loading...
