Service manual

Model no.:CT-21CBS5CPH.doc

version 1.0

4. VERTICAL SCAN OUTPUT STAGE CIRCUIT

LA78040/LA78041

Both LA78040/LA78041 are vertical scan output stage power amplifiers.

But there is a little bit difference between the two amplifiers, that is,

LA78040 has supply voltage of 24V and output current of 1.8AP-P while

LA78041 has supply voltage of 30V and output current of 2.2AP-P.

LA78040/LA78041 (N602)

Vertical Deflection Output Circuit

1) Features

Low power dissipation due to

built-in pump-up circuit Vertical

output circuit Thermal protection

circuit built in Excellent

crossover characteristics DC

coupling possible

2) Block Diagram

Fig. 13 Block Diagram