Service manual

Explanation for circuit operation

16V.

5-3) Overheat protection circuit

This circuit operates the latch circuit when the frame temps. of hybrid IC goes over 140

(MIN).

5-4) Overvoltage protection circuit

This circuit operates the latch circuit when Vin terminal voltage goes over 22.5V and protects

the Vin terminal of control circuit from overvoltage. The normal Vin terminal is supplied from

an auxiliary coil of trans and this voltage is proportioned to the output voltage. Thus, this

circuit works when the voltage detection circuit is open and the second overvoltage is output.

3. Deflection

3-1 Outline

This deflection PCB is composed of deflecting part to deflect 47”, 55” CRT Projection TV and

7” CRT, high voltage generator part, dynamic focus part, ABL part and VM part.

3-2 Block diagram