User manual AUDIOVOX MS160

[. . . ] The re-set circuitry is provided to protect the microprocessor circuitry and should only be activated under the following circumstance: If there is a malfunction of the switches on the unit or the CD player, pressing the RESET button may clear the system and return to normal MOD BUTTON Pressing this button to cyclically change function Radio-CD-Aux-Radio START BUTTON (M1) Pressing this button during CD play will set the unit to play from beginning of track 1. SCAN BUTTON (M2) To "Intro" each song on the disc for 10 seconds, press the " INTRO" button. To turn off this feature, press the " Intro" button again. The indicator in the display will be off. [. . . ] LO/DX KEY * This key is valid in radio mode and toggles LO/DX output and 'LOC' display. Local : LO/DX output=High, 'LOC' on Dx (initial) : LO/DX output = Low, 'LOC' off 2 APPLICATION NOTES This note will discuss DC Power sources and how they relate to 12 volt products. General Specifications Our general specification for the voltage range of operation is 10 to 16 volts DC . Voltage The voltage of a fully charged battery ( engine not running ) is approximately 12. 5 VDC. Once a load (items being powered represent the "load" ) is applied , the voltage will drop. How much the voltage is reduced will depend on the following: 1. Current draw (amount of amperage) The higher the draw the greater the voltage will drop. The size and length of the conductor (wire) supplying power. Converters Many boats incorporate convertors as a source for 12VDC when connected to shore power (110-120 VAC). Some converters put out a very clean DC supply where others may have a considerable amount of AC ripple noise under maximum load. The AC ripple noise is filtered by the boat battery when connected into the circuit , but when the battery is disconnected the amount of AC ripple noise can create major problems for audio products. Noise may result and the line fuse may fail Ignition systems Unwanted noise generated from ignition systems used to be a big problem. However, with more sophisticated filtering circuits designed into audio/video products, these problems are not as wide spread Changes in wire harnessing also has contributed to the decline of application problems. Use the same ground point for all related products. This will greatly reduce the potential for unwanted noise. WIRING DIAGRAM (Figure 2) CONNECTIONS UNIT OPTIONAL CD CHANGER (ACC56M) ANTENNA AUX INPUT CONNECTOR BLUE POWER ANT RED B+ FUSE (ACC) BLACK GROUND (-) GREEN W/BLACK WHITE WHITE W/BLACK FRONT LEFT SPEAKER GREEN REAR LEFT SPEAKER VIOLET W/BLACK GREY GREY W/BLACK FRONT RIGHT SPEAKER VIOLET REAR RIGHT SPEAKER SPECIFICATIONS Size: Operating Voltage: Output Power: Output Impedance: Tuning Range: Sensitivity: 7"(W) x 2" (H) x 6 1/8"(D) 178mm x 50mm x 166mm 12VDC, Negative Ground 4x25 W Max. Stereo Power Compatible with 4 or 8 ohm speaker. (AM) 530-1710KHz (FM) 87. 5-107. 9MHz (AM) less than 25uV (FM) less than 5uV More than 23 dB 50-10000Hz Your MS160 radio is designed to control an optional 10 Disc CD changer ( Model ACC56M ) . If you are interested in purchasing this CD changer, please visit your local marine dealer . Professional installation of the CD changer is recommended. 6 FM Stereo Separation: Frequency Response: 3 TROUBLESHOOTING CHART AM/FM RADIOS Symptom No Power APPLICATION NOTES AM/FM RECEPTION Some boats have more than one AM/FM radio. The best way to insure good reception is to supply a separate antenna for each radio. Other options available to supply adequate AM/FM reception to these radios are listed below, along with some general information in regards to radio reception. "Y"ADAPTORS The "Y" adaptors used to connect one antenna to two radios will compromise both AM and FM reception. [. . . ] All this is necessary in order to maintain a good signal, especially AM. FM RECEPTION FM reception can be received with a very limited antenna and strong local FM stations can be received without an antenna , depending on the circumstances. CONCLUSION: AM/FM reception is subject to the choice of an antenna and it's application. There can also be a variety of methods used to supply signal to both primary and secondary radios , but AM performance is the ultimate "test" Cause No 12VDC Possible Solution Check circuit fuse at source Check in-line fuse on power lead Power lead disconnected Ground connection disconnected Circuit fuse at source In-line memory lead fuse Check continuity of speaker leads to ground Check for proper speaker wiring Note: Radios have a sticker on them explaining wiring color code. [. . . ]