Horizontal Drive And Power Supply Output - Mitsubishi DPLUS 74SB -BKA Service Manual

4. Horizontal drive and power supply output

VCC
R1
T1
Q2
Circuit Diagram
Description of the circuit:
1) R1, T1 and Q2 compose the horizontal driving circuit, and transistor Q1 generates a horizontal output
through the driving signal.
IB1 = I
I = 3I
B2
di/dt = 3.3 A/
2) Resistor R2 corrects the current IB1, resistor R3 works as a damping resistor and leak resistor and
diode D2 works as a discharging device and polar body.
As long as transistor Q1 is OFF, the discharge is accelerated and the storage time (Tstg) is short-
ened.
3) H-OUT circuit wavefor
R2
D2
R3
/ Q1h
CPMAX feMIN
B1
US
DR
CT
Q1 D1
CS
7-33
+
C2
B+