You will nearly always find one of two types of horizontal output transistors
in TVs and monitors:
|NotTaR of Television Sets : Horizontal output transistor pinouts
1994-2007, Samuel M. Goldwasser. All Rights Reserved. Reproduction of this document in whole or in part is permitted if both of the following conditions are satisfied: 1. This notice is included in its entirety at the beginning. 2. There is no charge except to cover the costs of copying.
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Metal can - TO3 package:
/ O \ View from bottom (pin side)
/ o o \
( B E ) B = Base, E = Emitter, C = Collector
\ O / C The metal case is the Collector.
Plastic tab - TO3Pn (n = several suffixes) package:
| O | View from front (label side)
| | B = Base, E = Emitter, C = Collector
| | | If there is an exposed metal tab, this is the
| | | Collector as well.
B C E
Some other transistor types use the same pinout (TO66 for metal can, TO218
and TO220 for plastic tab) but not all. However, for horizontal output
transistors, these pinouts shouuld be valid.
Note that those with a built in damper diode may read around 50 ohms between
B and E (near 0 on the diode test range) - this is normal as long as the
resistance is not really low like under 10 ohms.
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