Audison LRx 4.5 Service Manual

3. Idling Current Adjustment
1. Before adjusting the idling current, turn the amplifier on and let it play for several minutes. When the heat sink
temperature reaches a range between 30 and 45°C (86 ÷ 113°F) that is the optimal condition to perform the adjustment.
2. Disconnect loads and input signals and open the amplifier bottom cover.
3. Take a digital multimeter and set it in continuous voltage. Then connect probes to the Emitter power transistor
leads as shown in the picture.
4. Take a very small screwdriver and adjust the trimmer till you read 5.0 ÷ 6.0 mVDC on the multimeter.
5. Repeat the same procedure for each channel.
Note: Small variations regarding the values indicated, do not cause working defects.
DIGITAL
MULTIMETER
5.5 mVDC
DIGITAL
MULTIMETER
5.5 mVDC
DIGITAL
MULTIMETER
5.5 mVDC
DIGITAL
MULTIMETER
5.5 mVDC
b c e b c e b c e b c e
b c eb c eb c eb c e
B Channel L A Channel L
B Channel R A Channel R
TECHNICAL NOTES
Rev. A
Part 3 page 3 of 3

Audison LRx 4.5 Specifications

General

Brand	Audison
Model	LRx 4.5
Category	Car Amplifier
Language	English