Instruction Manual - DECA | Diving Equipment Company of America

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MAINTENANCE PROBLEMS AND THEIR POSSIBLE CAUSES (Continued) 8.4 Low Battery Indication The Model 2830A/24 is designed as an A.C. Powered unit, with a backup battery to operate the unit in the event A.C. power is lost. If the unit has lost A.C. power and the rechargeable backup battery voltage is low, charge battery for a minimum of 24 hours to fully charge battery. Battery will charge anytime the unit is plugged into the AC line, make sure the AC power circuit being used is not switched off at night. The preferred method to charge the battery is with power switch off. The charger circuit is designed to maintain the battery at full charge during normal operation, and power can be left on without damage to the battery. The battery voltage can be checked by measuring across the yellow push-to-talk jacks. Turn the unit on. If the unit is plugged into the AC line, the measurement will be the output of the battery charger. To measure the battery voltage, disconnect the unit from the AC line. The voltage at full charge, with the charger on, should be between 13.0 and 14.0 volts. With the charger off, a fully charged battery should be between 11.75 and 12.5 volts. The battery voltage of a discharged battery (rechargeable) is 10.0 volts; the battery should not be operated below this point, as permanent damage will occur. The rechargeable batteries used in the Amron communicators are a gel cell design. The battery capacity for the 2830A/24 is 7 amp/hr; the quiescent current of the standard unit is approximately 0.50 amps. This would provide a theoretical operating time of 13 hours. During usage the current requirement will increase depending upon the volume level setting, the number of divers connected, and how often the push to talk function is used. The gel cell battery has an expected life of 3 years or 300 charge discharge cycles. WARNING: Should it become necessary to change the 12V battery, be sure to connect the RED wire to the Positive terminal and the BLACK wire to the Negative terminal. A momentary reversal of polarity will destroy the electronics of unit. There is a fuse F3 in the charger card secondary circuit located next to J2. When reversing internal battery terminals, this fuse will blow to protect the electronic circuits and wiring from being damaged. F3 fuse is replaceable with 3.15A-250V Slow Blow Micro Fuse. 35
DRAWINGS DRAWINGS & SCHEMATICS 9.1 General The following drawings illustrate the electrical and mechanical details of the AMCOM III Diver Communications. The corresponding parts lists for each drawing are detailed in the parts lists section, or are included as part of the drawing. Revisions As drawings are updated, information about changes is incorporated into a revision sheet. This revision sheet appears in the manual immediately after the drawings. It lists the drawing number, reference designator of the part or parts involved, a description of the revision, and the effective serial number of the change. With this information the technician can determine the correct drawing for the current version, and any previous version, of the unit covered by this manual. If the revision is applicable for all versions of the unit, it is not included in the revision notice, as the change applies to all units. 36
Page 1 and 2: User Manual For Amron International
Page 3 and 4: TABLE OF CONTENTS Theory of Operati
Page 5 and 6: GENERAL INFORMATION GENERAL INFORMA
Page 7 and 8: OPTIONS OPTIONS 3.1 Model /26 Heliu
Page 9 and 10: CONTROLS & CONNECTIONS CONTROLS AND
Page 11 and 12: CONTROLS & CONNECTIONS DIVER CONNEC
Page 13 and 14: CONTROLS & CONNECTIONS OPTIONS (con
Page 15 and 16: CONTROLS & CONNECTIONS DRAWING, SIM
Page 17 and 18: CONTROLS & CONNECTIONS DRAWING, OPE
Page 19 and 20: INSTALLATION & OPERATION BATTERY CO
Page 21 and 22: INSTALLATION & OPERATION VOLUME CON
Page 23 and 24: INSTALLATION & OPERATION OTHER TEND
Page 25 and 26: INSTALLATION & OPERATION OPTIONS (C
Page 27 and 28: INSTALLATION & OPERATION SIMULCOM -
Page 29 and 30: INSTALLATION & OPERATION SIMULCOM -
Page 31 and 32: THEORY OF OPERATION AUDIO VOLUME CO
Page 33 and 34: THEORY OF OPERATION FUNCTIONAL BLOC
Page 35 and 36: MAINTENANCE COMPREHENSIVE 2-WIRE &
Page 37: MAINTENANCE PROBLEMS AND THEIR POSS
Page 41 and 42: DRAWINGS SCHEMATIC 2830A/24-MS 9.3
Page 43 and 44: DRAWINGS SCHEMATIC OPTION 2828-FDW
Page 45 and 46: DRAWINGS PARTS IDENTIFIER, 2324-202
Page 47 and 48: DRAWINGS PARTS IDENTIFIER, FRONT PA
Page 49 and 50: PARTS LIST GENERAL 10.1 The followi
Page 51 and 52: PARTS LIST AMCOM III MODEL 2830A/24
Page 57 and 58: PARTS LIST 2830A-400M FRONT PANEL A

Instruction Manual - DECA | Diving Equipment Company of America

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