TEAC AUSTRALIA
TECH MEMO – “TELEVISION”
Date: 29-Sep-1998
File: CTM-805SR-3
MODEL: CTM805SR
Symptom:
Component SE140N (Q905) is being replaced by standard NPN
transistor.
This component is NOT a NPN transistor as shown in the CT-M805SR
circuit diagram. This device is acting as a voltage sensing device (ie.
For B+ voltage) which via the opto-coupler changes the pulse width on
the primary side of the switch-mode supply.
Equivalent Circuit:
Instructions:
Use only the specified component. Use P/N 1300SE140N when ordering.
Regards,
Fabian Lubanovic
Technical Manager
