akira CT-21CBP5CP, Service Manual

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Model no.: .CT-21CBP5CP.doc
version 1.0
33
1.4 Vertical scan output stage circuit
TDA8356/N6 DC-coupled vertical
deflection circuit TDA8356
1) Features
•
Few external components
•
Highly efficient fully DC-coupled vertical output bridge circuit
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Vertical flyback switch
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Guard circuit
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Protection against: Short-circuit of the output pins (7 and 4) Short-circuit of the output
pins to VP.
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Temperature protection
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High EMC immunity because of common mode inputs
•
A guard signal in zoom mode.
2) General Description
The TDA8356 is a power circuit for use in 90, and 110, colour deflection
systems for field frequencies of 50 to 120 Hz. The circuit provides a DC driven
vertical deflection output circuit, operating as a highly efficient class G system.
3) Block Diagram
SYMBOL PIN DESCRIPTION
Idrive(pos) 1 input power-stage (positive); includes II(sb) signal bias
Idrive(neg) 2 input power-stage (negative); includes II(sb) signal bias
VP 3 operating supply voltage
VO(B) 4 output voltage B
GND 5 ground
VFB 6 input flyback supply voltage
VO(A) 7 output voltage A
VO(guard) 8 guard output voltage
VI(fb) 9 input feedback voltage