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Power Transistor Circuit

POWER TRANSISTOR CIRCUIT

CIRCUIT DESCRIPTION

The air conditioning control assembly controls the blower speed by varying the voltage at terminal BLW which applies the base current to the power transistor.

The air conditioning control assembly also monitors the power transistor collector voltage at terminal VM, to control blower air volume precisely.

DIAGNOSTIC CHART

WIRING DIAGRAM

Step 1:

Step 2:

INSPECTION PROCEDURE