The S1500 / S2000 Protection Circuitry

As noted in the “Guided Tour” section of this manual, the S1500 / S2000 front-

panel Protection LED indicates the activity of the relay speaker connection

circuitry. When the Protection LED is lit, this circuitry is active, and all connected

speakers are muted (provided with 0 volts DC), thus protecting them and

preventing any audible “thump” from occurring.

The following conditions will cause the Protection LED to go on:

•

Initial power-up: For approximately five seconds after initial power-up, the

protection circuitry is activated and the speaker output is muted. If everything is

operating normally, you will hear an audible click at the conclusion of this brief

period, as the protection circuitry is deactivated and the S1500 / S2000 begins

delivering signal to connected speakers (at which point you’ll hear a click). It is

normal for the Protection LED to fade gradually after the amplifier is powered off.

•

Overheating: A temperature sensing device in the S1500 / S2000 will cause

the protection circuitry to be activated (and the Protection LED to go on)

whenever the operating temperature of the unit rises above a safe level. To

guard against this problem, make sure the S1500 / S2000 receives adequate

ventilation on all sides and that both the front and rear panels are unobstructed.

•

Severe overcurrent conditions: This occurs whenever the signal being input to

the S1500 / S2000 rises to a level above 20% THD (Total Harmonic Distortion).

•

Shorted speaker cables: This will occur if, due to faulty wiring, the hot and

ground signals being output by the S1500 / S2000 short one another.

•

Output impedance drops below 2 ohms: This can occur if the S1500 / S2000

is connected to inappropriate speaker systems (see the “Setting Up and Using

Your S1500 / S2000” section on page 5 in this manual for more information).

•

DC voltage detected at speaker output: The most likely cause of this is an

internal failure.

In general, any time the Protection LED lights up (other than during the

approximately five seconds following initial power-up), there is reason to be

concerned. If this occurs, turn the S1500 / S2000 off immediately and carefully

check all wiring and external devices in order to locate and correct the condition

that caused the LED to light up in the first place.

For further assistance, contact your local Samson dealer. If purchased in the

United States, you can call Samson Technical Support (1-800-372-6766)

between 9 AM and 5 PM EST.

WARNING: If the Protection LED fails to go out (and you fail to hear the

accompanying audible click) approximately five seconds after power-up,

turn the S1500 / S2000 off immediately and check all external devices and

wiring for possible shorts or other defects.

PROTECTION

1 2 3 4 5 6 7 8 9 10 11 12

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Table of Contents

IMPORTANT SAFETY INFORMATION

SAVE THESE INSTRUCTIONS

Specifications

Installation Instructions

Operating Controls

Before Operating Hoist

Applying the Load

Moving the Load

Parking the Load

Frequent Inspection

Storage Inspection

Maintenance

Parts List

Assembly Diagram

Limited 90 Day Warranty

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