Product Support Manual ACR/EM-1A, ACR/EM-1D™ Portable Safety Megaphone FAA PMA Approved under A3-06-1402Product No. 2204, 2208 Y1-03-0014 Rev. AC (25-60-01) The technical data in this document (or file) is controlled for export under the Export Administration Regulations (EAR), 15 CFR Parts 730-774, ECCN: EAR99. Violations of these laws may be subject to fines and penalties under the Export Administration Act. ACR Electronics, Inc.
REV DESCRIPTION DATE APVD. L Format changes, add ACR/EM-1D content. 9/8/98 T. Martin M Update parts list to reflect design changes. 5/20/99 T. Martin N Update and make corrections to parts list. 7/13/99 T. Martin P Update to assign 4-digit product codes to parts list. 12/8/99 L. Subrattee R Add FAA approval info to front cover. 4/27/04 T. Martin U Update to add revision table and updated formatting. 2/7/08 T. Martin V Updated for rebranding 4/3/09 T.
Table of Contents SECTION 1 – DESCRIPTION 4 1.1 Options Matrix 4 SECTION 2 – OPERATION 4 2.1 Battery Monitor 4 SECTION 3 – Maintenance 5 3.1 Cleaning 5 3.2 Battery Replacement 5 SECTION 4 – testing, TROUBLESHOOTING & Repair 5 4.1 Testing 5 4.2 Repair 6 SECTION 5 – DISASSEMBLY & assembly 6 5.1 Disassembly 6 5.2 Assembly 7 SECTION 6 – TECHNICAL DATA 7 SECTION 7 - Parts List 8 appendix - Warranty, Useful Life, Notices 10 1. Limited Warranty 10 2.
SECTION 1 – DESCRIPTION The ACR/EM-1A or ACR/EM-1D is a battery operated solid state megaphone specifically developed for use in enclosed areas such as in the interior of an aircraft or ship cabin. It has been designed to minimize regenerative acoustic feedback that results in whistling and other oscillations of this nature. It has a 90° sound projection angle to direct the sound to persons in its immediate vicinity, as well as in the rear sections of any aircraft.
SPEAKER ASSEM BLY VISU AL BATTER Y C H EC K LED VO LU M E C O N TR O L AU D IO AM PLIFIER SIR EN C IR CU IT & BATTERY M O N ITO R M EG APH O N E SUB-ASSEMBLY M ICR O PH O N E ASSEMBLY - + + N.O . * ALARM PLUG PIN N.C . HANDLE SW ITCH + BATTERY PAC K - (6 x AA) FIGURE 1 BLOCK DIAGRAM ACR/EM-1A, ACR/EM-1D PORTABLE SAFETY MEGAPHONE SECTION 3 – Maintenance 3.1 Cleaning External surfaces of the megaphone may be cleaned with a soft cloth, dampened in a solution of mild household detergent.
2. 3. 4. 5. Remove the pin that activates the siren. If the alarm is of normal amplitude and sound character, the amplifier and siren circuitry are functioning properly. If the amplification is low, check the batteries and then the amplifier. If the sound character is abnormal, check the batteries and then the siren circuitry. (ACR/EM-1A only) If no sound is heard, remove the microphone and mouthpiece assembly and the batteries. Check that both the microphone and battery contacts are clean.
Inspect unit for any evidence of damaged parts, loose mountings or broken leads, and dirty electrical contacts. 5.2 Assembly 1. 2. 3. 4. 5. 6. 7. Attach Horn (17) and Speaker Assembly (6) to Megaphone Subassembly (9). Ensure alignment with location pins. Pass speaker wires through the provided slot. Plug speaker connector into the “out” header on PCB. Push entire assembly gently into the housing (14), until it stops. Turn clockwise 45° and push all the way in. Turn counterclockwise 45° and align holes.
SECTION 7 - Parts List 12 8 7 17 6 16 4 10 5 15 3 9 2 1 14 13 11 FIGURE 2 ACR/ EM-1A, ACR/EM-1D PORTABLE SAFETY MEGAPHONE ILLUSTRATED PARTS LIST Replaceable parts are illustrated in Figure 2 (shown above) and listed in the table (shown on page 9). Part numbers shown in the “Part Number” column may be ordered from ACR unless another manufacturer’s name is given in parentheses in the “Description” column. In this case, replacement parts can be obtained directly from the original manufacturer.
ITEM QTY NOMENCLATURE ORDER SPARE PARTS ACR/EM-1A S/N < 9000 ACR/EM-1A ACR/EM-1D S/N ≥ 9000 ALL S/N 1 1 Microphone & Mouthpiece Assy 9211 9211 9211 2 1 Socket Setscrew Kit 9416 9416 9416 3 6 Battery AA Alkaline Commercial Commercial Commercial 4 1 Knob, control 9022 9022.1 9022.
appendix - Warranty, Notices A.1 Limited Warranty This product is warranted against factory defects in material and workmanship for a period of 1 (one) year* from date of purchase or receipt as a gift. During the warranty period ACR Electronics, Inc. will repair or, at its option, replace the unit at no cost to you for labor, materials and return transportation from ACR. For further assistance, please contact our Technical Service Department at ACR Electronics, Inc.
