Philips 21PT2327/79 Service Manual page 29

Circuit Descriptions, Abbreviation List, and IC Data Sheets
9.3.6 IC301 (LA78040N-E)
IC301 is a vertical deflection output IC.
Its block diagram and pin connection are as follows:
Block Diagram
Pin Configuration
Figure 9-5 Block diagram and pinning of IC301 (LA78040N-E)
1 7
H_17130_031.eps
9.3.7 Q402 (BU4508DZS)
Q402 is a high speed switching, high voltage PNP power
transistor with a built-in damper diode, designed for use in
horizontal deflection circuits.
The pinning is as follows:
PIN CONFIGURATION
PINNING SOT186A
SYMBOL
PIN
1 base
2 collector
3 emitter
case isolated
240407
Figure 9-6 Pinning of Q402 (BU4508DZS)
TC8.1A CA
case
1 2 3
c
b
Rbe
e
DESCRIPTION
H_17130_033.eps
240407
9. EN 31