User manual PIONEER DT-550

[. . . ] Operating this unit Head unit 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. Always keep the volume low enough to hear outside sounds. If the battery is disconnected or discharged, any preset memory will be erased. [. . . ] SLA (source level adjustment) SLA (Source Level Adjustment) lets you adjust the volume level of each source to prevent radical changes in volume when switching between sources. Settings are based on the FM volume level, which remains unchanged. The AM/MW/SW volume level can also be adjusted with this function. When selecting FM as the source, you cannot switch to SLA. AM STEP (AM tuning step)/MW STEP (MW tuning step) DT-550 and DT-550G: AM STEP DT-550SW: MW STEP The AM/MW tuning step can be switched between 9 kHz, the preset step, and 10 kHz. When using the tuner in North, Central or South America, reset the tuning step from 9 kHz (531 kHz to 1 602 kHz allowable) to 10 kHz (530 kHz to 1 640 kHz allowable). AUX (auxiliary input) Activate this setting when using an auxiliary device connected to this unit. 1 Press S (SRC/OFF) and hold until the unit turns off. After selecting, perform the following procedures to set the initial setting. FM STEP (FM tuning step) The FM tuning step employed by seek tuning can be switched between 100 kHz, the preset step, and 50 kHz. Tune in the stations with manual tuning or use seek tuning again. Also, never connect it to the power terminal of the auto antenna. Doing so may result in battery drain or a malfunction. Use speakers over 50 W (output value) and between 4 W to 8 W (impedance value). Do not use 1 W to 3 W speakers for this unit. When installing this unit or power amp (sold separately), make sure to connect the ground wire first. Ensure that the ground wire is properly connected to metal parts of the car's body. The ground wire of the power amp and the one of this unit or any other device must be connected to the car separately with different screws. If the screw for the ground wire loosens or falls out, it could result in fire, generation of smoke or malfunction. Metal parts of car's body # AUX cannot be selected unless the auxiliary setting is turned on. When installing this unit in a vehicle without an ACC (accessory) position on the ignition switch, failure to connect the red cable to the terminal that detects operation of the ignition key may result in battery drain. Use this unit with a 12-volt battery and negative grounding only. [. . . ] firmly secure the USB storage device when driving. Do not let the USB storage device fall onto the floor, where it may become jammed under the brake or accelerator pedal. Depending on the USB storage device, the following problems may occur. The device may generate noise in the radio. [. . . ]