Mitsubishi Electric C-6479 Series Manual page 31

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3.7 VE~~ICAL DEF~CTION. CIRCUIT
--
~he ver~ical deflec~ion cir=uits consist of the IC40l,
(contains
~~e
vertical oscillator and vertical =river),
vertical output stage and vertical centering cir=uit.
15~ t$-~
i :
~~c
Ii '-
x _-P---:R=ox~1 ----r~~1
~
ru:
r-
'I
H-OSC
ICS03 HAll414
V-DR~~
i
v-osc
1 2 3 4 '
'S'--6'-~
'-"
~-~
Fig. 3-6 Block Diagram of ICS03
The vertical sync pulse is applied to pin #8 of IC40l,
and oscillator sawtooth wave generated in ~~e IC401 is
compared
wi~~
the feed back deflection current wave
developed across R4l0 ~~d R411.- Height control, VR401
adjusts
~~e wavefo~
of the feed
~ack
voltage.
The output voltage from IC401, pin #2 is applied to
the base of driver Q492.
The vertical output amplifier Q491 and Q492 operates
Class B push-pull. When scanning the upper half of
the screen, deflection yoke current flows
~~rough
+80V, Q491 and C411. When scanning the lower half
of the screen, the yoke current reverse flowing
through C4ll and Q492.
3-15
.-
...........
:
.