User manual PIONEER DT-540

[. . . ] Check the connections of the power supply and speakers if the fuse of the separately sold battery wire or the amplifier fuse blows. Determine and resolve the cause, then replace the fuse with identical equivalent. Do not allow this unit to come into contact with liquids. Also, damage to this unit, smoke, and overheating could result from contact with liquids. [. . . ] This eliminates high range frequency and outputs low range frequency. 1 Power indicator The power indicator lights up to indicate power ON. 2 BFC (beat frequency control) switch Located front side the unit. If beats are audible while listening to AM broadcasts via car stereo, change the BFC switch using a small flathead screwdriver. If output remains low, even when the car stereo volume is turned up, turn controls to lower level. If distortion occurs when the car stereo volume is turned up, turn these controls to higher level. Protective function included to prevent malfunction of the unit and/or speakers due to excessive output, improper use or improper connection. , this function cuts off the output for a few seconds as a normal function, but output is restored when the volume of the head unit is turned down. A cut in sound output may indicate improper setting of the gain control. To ensure continuous sound output with the head unit at a high volume, set amplifier gain control to a level appropriate for the preout maximum output level of the head unit, so that volume can remain unchanged and to control excess output. Despite correct volume and gain settings, the unit sound still cuts out periodically. Do not connect both the RCA input and the speaker input at the same time. The use of a special red battery and ground wire RD-223, available separately, is recommended. If the battery wire is not securely fixed to the terminal using the terminal screws, there is a risk of overheating, malfunction and injury, including minor burns. After completing all other amplifier connections, finally connect the battery wire terminal of the amplifier to the positive (+) battery terminal. Fix the wires securely with the terminal screws. Fix the speaker wires securely with the terminal screws. 1 Expose the end of the speaker wires using nippers or a cutter by about 10 mm and twist. To ensure proper installation, use the supplied parts in the manner specified. If any parts other than those supplied are used, they may damage internal parts of the amplifier, or become loose causing the amplifier to shut down. Do not install in: -- Places where it could injure the driver or passengers if the vehicle stops suddenly. -- Places where it may interfere with the driver, such as on the floor in front of the driver's seat. [. . . ] When drilling to install the amplifier, always confirm no parts are behind the panel and protect all cables and important equipment (e. After installing the amplifier, confirm that the spare tire, jack and tools can be easily removed. Example of installation on the floor mat or chassis 1 Place the amplifier in the desired installation location. Insert the supplied tapping screws (4 mm × 18 mm) into the screw holes and push on the screws with a screwdriver so they make an imprint where the installation holes are to be located. [. . . ]