Toshiba 28YT56, Service Manual

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2.2.3 DEFLECTION & DISPLAY BLOCK
2.2.3.1 Horizontal Deflection
Deflection block consist of following main parts,
Horizontal driver transistor (Q601),
Horizontal driver (TR600),
HOT (Horizontal Output Transistor) (Q600),
FBT (TR601),
E/W transistor (Q602),
E/W coil (L601),
E/W injection Coil (Bridge Coil) (L602),
Linearity Coil (L603),
Flyback Capacitors (C608, C607),
S-correction capacitor (C615 ve C613),
Modulated S-correction capacitor (C611),
Hdrive signal is buffered and applied to line driver transistor by a capacitor.
Line driver produces necessary base currents, parallel diode to base series resistor speeds up the
reverse base current.
UOC3 has soft-start and soft-stop features to have more safe operation. There are two base current
adjustment resistors on the circuit. Collector current differs according to CRT sizes .
Tube dependent components are choosen to fit best picture performance by keeping;
11,5 usec. Flyback time,
Max. 1300V. collector voltage (peak-detect mode measurement)
Max. 500V. at the diode modulator cathode (D605).
Max. 20V. (peak-detect mode measurement) at the E/W transistor drain.
Max. 200V video B+ voltage.