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CIRCUIT OPERATION THEORY
2. 1 Deflection CKT
2.1.1 The Block Diagram of Deflection
Vertical
Deflection
Output
IC TDA8351
H-SIZE
Compensation
Dynamic
Regulation
Feedback
2.1.2 Autosync Deflection Controller (TDA4854)
Pin 1 is AFC feedback .
Pin XRAY: if V XRAY > threshold (6.25V typical) switches the whole IC into protection mode.
Pin 3,4,5,6,8 for B+ control function block.
Pin 11(EWDRV) is a parabolic waveform used for pincushion correction
Pin 16 generates video claming & blanking pulse.
Pin 18,19 is I2C data.
Pin 21 V-regulation.
The resistor from pin 28 (HREF) to ground determines the maximum oscillator frequency.
The resistor from pin 27 (HBUF) to pin 28 defines the frequency range.
Pin 31 H-regulation.
Pin 32 focus.
Circuit Operation Theory
H-sync
Digital
V-sync
Controller
AutoSync Deflection
Controller
IC TDA4854
Step Up
for B+
Shut down
Circuit
Horizontal
Deflection Output
Circuit
API Confidential
No Copy/Reproduction Allowed
Tilt
Circuit
I2C BUS
G1 & Spot
Killer
Circuit
G1
C h a p t e r 2
Rotation Coil
Dynamic
Focus
2-1
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