Vertical Scan Output Stage Circuit - Toshiba 21E88 Service Manual

SERVICE MANUAL
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 1.8A while LA78041 has supply voltage of 30V and
P-P
output current of 2.2A .
P-P
LA78040 /LA78041
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
Fig. 20
Package Type: TO-220-7H
2). Block Diagram
Fig.21
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