High Performance Amplifier (150-1109) Operation Faxback Doc. # 19600 Using the FM Trap If the TV picture contains wavy or herringbone-patterned dark line, slide FM TRAP to IN to reduce or eliminate this interference. If you have the amplifier connected to an FM receiver and a TV, set FM TRAP to OUT when you listen to FM. NOTE: If FM TRAP has no effect on the picture, the interference might be from a source other than FM. You might need additional traps. Using the Gain Control If your TV receives too strong a signal, the picture tears and becomes distorted. To prevent this, use a small flathead screwdriver to rotate GAIN to provide the maximum signal amplification without overload. Rotate GAIN to MAX for weak or distant stations. Rotate GAIN toward MIN for strong or nearby stations. Automatic Protection Circuit The amplifier contains circuitry to guard against damage caused by a short anywhere in the cable from the amplifier to the receiving unit. A short between the amplifier and the power supply causes the power supply to shut down automatically, turning off the power indicator and amplifier. If you suspect a short, follow these steps to correct it. 1. Unplug the power cord and disconnect the coaxial cable you suspect is shorted. 2. Wait 10 minutes for the power supply to reset. During this time, repair or replace the cable. 3. With the cable disconnected, plug in the power cord. 4. If the power indicator lights, unplug the power supply, re-connect the cable, and plug in the power cord again. The power indicator should light again. If the power indicator still does not light, take the unit to your local Radio Shack store for assistance. (CS 11/27/95)