Toshiba CF35E50, Technical Training Manual

Page: 91 / 139

91
4-1-3. Later Half of Flyback Period
All energy in the coil has been transferred to the resonant
capacitors at the center of the flyback period, and the voltage
shows the maximum value. However, during next half of the
flyback period, the energy of the resonat capacitor is
discharged as a reverse current through respective coil.
When the discharge has been completed, VA and VB becomes
zero, and the deflection current in reverse direction becomes
the maximum. 4-1-4. First Half of Scanning Period
When the flyback period completes, the damper diode DD
and the modulation diode DM turn on, and the Iy and Im
proportionally decrease from the maximum value to zero.
The H. OUT transistor is turned on just preceding at the
center of the scanning period, and repeats the steps 4-1-1
through 4-1-4 stated above.
Fig. 12-13
Fig. 12-15
Fig. 12-14
Fig. 12-16
I
P1
I
P2
C
1
C
2
V
A
L.O.P.T
I
Y
I
Y2
L
DY
I
P
C
S
V
B
V
B
L
M
I
DC
C
3
I
M
C
SM
I
Y1
Iy
V
A
0
0
0
0
I
DC
I
M
V
B
0
C
1
C
2
0
C
3
C
1
: I
Y1
+I
P1
C
2
: I
Y2
+I
P2
C
3
: I
P2
-
I
y1
-
I
M.
D
D
V
A
FBT
I
Y
L
DY
C
S
V
B
V
B
L
M
I
M
C
SM
I
M
D
M
Voltage & current waveform in H period.
I
Y
V
A
0
0
0
0
I
DC
I
M
V
B