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Amron 2820A-4003 Instruction Manual

Chamber communicator
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Instruction Manual
For
Amron International Diving Supply, Inc.
Model 2820A-4003 & 2820A-4003E
Chamber Communicator
S/N
This manual and the information contained herein is provided for use as an operation and
maintenance guide. No license or rights to manufacture, reproduce, or sell either the manual or
articles described herein are given. Amron International Diving Supply, Inc. reserves the right to
change specifications without notice.
Amron International Diving Supply, Inc.
1380 Aspen Way
Vista, California 92081 U.S.A
Phone:(760) 208-6500
Fax (760) 599-3857
Email:
Sales@amronintl.com
Website: www.amronintl.com
Copyright © 2009, Amron International, Inc.
Revised August 2010

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Summary of Contents for Amron 2820A-4003

  • Page 1 This manual and the information contained herein is provided for use as an operation and maintenance guide. No license or rights to manufacture, reproduce, or sell either the manual or articles described herein are given. Amron International Diving Supply, Inc. reserves the right to change specifications without notice.

  • Page 2: Table Of Contents

    TABLE OF CONTENTS CONTENTS SECTION Specifications General Information Description ........................2.1 Description 2820A-4003E .....................2.2 Drawing, Front Panel Controls Model 2820A-4003............2.3 Drawing, Front Panel Controls Model 2820A-4003E ............2.4 Options Warranty and Service Policy Limited Warranty ......................4.1 Service Policy........................4.2 Controls and Connections General .........................5.1 Operator Controls......................5.2...
  • Page 3 Parts Identifier 2832-202....................9.4 Parts Identifier 2324-202....................9.5 Parts Identifier - Front Panel 2820A-4003..............9.6 Parts Identifier - Front Panel 2820A-4003E ..............9.7 Parts Identifier - Rear Chassis 2820A-4003 & 2820A-4003E ........9.8 Mounting Detail 2820A-4003 & 2820A-4003E ............. 9.9 Parts List General ........................10.1 Model 2820A-4003 Chamber Communicator..............10.2 Model 2820A-4003E Chamber Communicator w/ Entertainment .......10.3...
  • Page 4 SPECIFICATIONS SPECIFICATIONS Electrical Input Impedance (each Input) ................250 Ohms Frequency Response ................300 - 10000 Hz Common Mode Rejection................40 dB Minimum Current Drain Maximum Full Volume....................3 A Minimum Quiescent ...................0.250 A Output Impedance....................4 Ohm DC Power Requirements Voltage ............12 VDC Nominal (For Operation on External) - Range......

  • Page 5: General Information

    The Model 2820A-4003 & 2820A-4003E are used in conjunction with a chamber talk back speaker i.e., the Amron Model 3113, 3114, 3115, 3125 or 3126. The Model 2820A-4003E is exactly the same as the 2820A-4003, but also includes a separate entertainment channel, amplifier.

  • Page 6: Description 2820A-4003E

    The entertainment audio output is connected to a separate speaker within the chamber, i.e., the Amron model 3130. Stereo input connections (RCA jacks) are provided on the back panel for connection to the desired audio entertainment source. The audio source can be audio (music) from any source i.e., AM, FM, tape recorder, CD player, TV or other source as desired.
  • Page 7 GENERAL INFORMATION FRONT PANEL CONTROLS MODEL 2820A-4003...
  • Page 8 GENERAL INFORMATION FRONT PANEL CONTROLS MODEL 2820A-4003E...

  • Page 9: Options

    AMRON headset extension with push-to-talk belt module, jacks for headset, and 25 cable. (Use with Model 2460-28 or Model 2401-28 headset). Model 2822-28 Remote Walk-and-Talk (4-Wire Operation) Amron full duplex (4-wire) headset extension, belt module with 25 feet cable. (Use with Model 2460-28 headset) Model 2460-28 Headset Headset with boom microphone and color coded dual banana plugs to mate color coded inputs on Amron communicators and accessory items.
  • Page 10 OPTIONS OPTIONS (Continued) Model 3128 Chamber Wiring Harness (Custom) Decompression chamber wiring harness, one end connects directly to 2820-4003, other end connects to model 3127 junction box. Pre wired, tested and customized to your chamber size requirements. Model 3130 Chamber Entertainment Speaker Decompression chamber entertainment speaker.

  • Page 11: Limited Warranty

    INTERNATIONAL DIVING SUPPLY, Inc.. Literature covering this product, for a period of 90 days from date of shipment. Amron’s obligation under this warranty is limited to the repair of or replacement, at AMRON’S option, of defective material. This warranty shall not cover defects which are the result of misuse, negligence, accident, repair or alterations.

  • Page 12: General

    Before using the AMCOM II chamber communications system, you should familiarize yourself with its operating controls and connections. Improper use of controls and connections may deprive the user of the full benefit of this communication system. Reference: Figure 1 & 2 Front Panel model 2820A-4003 and 2820A-4003E. OPERATOR CONTROLS Power Switch Turns unit on/off, applies power to the unit from internal rechargeable batteries or from external source.
  • Page 13 CONTROLS & CONNECTIONS OPERATOR CONNECTIONS (Continued) P.T.T. (input) Push To Talk (input) Is a dual banana jack connection for remote keying of push to talk single contact closure, close to talk to the chamber, open to listen to the chamber. Banana jacks are color coded yellow.
  • Page 14 CONTROLS & CONNECTIONS OPERATOR CONNECTIONS (Continued) Entertainment Controls, Model 2820A-4003E Only Volume - Adjusts the volume level of the entertainment audio within the chamber and is located with the inner lock group of controls. Rear Panel Connections MS Connector - Electrical connections to chamber, inner and outer lock audio signals, entertainment channel output (2820A-4003E only) and power connections for operation from a 12 VDC source.
  • Page 15 CONTROLS & CONNECTIONS 2820A-4003 PUSH TO TALK MICROPHONE...
  • Page 16 CONTROLS & CONNECTIONS 2820A-4003 HEADSET CONNECTION...
  • Page 17 CONTROLS & CONNECTIONS SCHEMATIC CONNECTION MODEL 2820A-4003 TO CHAMBER...

  • Page 18: Installation & Operation

    The push to talk microphone has two dual banana plugs. Insert the yellow banana plug into the yellow jacks, (push to talk jacks on front of 2820A-4003). Insert the black dual banana plug into the black jacks, (jacks labeled headset on the front of the 2820A-4003). A microphone holder is provided on the front panel to facilitate storage of the microphone when not being used.

  • Page 19: Initial Set

    This permits a three party conversation similar to that of a telephone. You may find it necessary to turn off the 2820A-4003 speaker while the operator is using a headset. A feedback condition can occur while using a headset (headset microphone is receiving the sound from the speaker causing the feedback) it will depend upon two factors, the volume level and the distance between the headset and the speaker.

  • Page 20: Description Of Operator Controls

    INSTALLATION & OPERATION DESCRIPTION OF OPERATOR CONTROLS Power On - Off - this switch controls power to the unit. This switch does not disable the battery charging circuit. The battery condition indicator should come on when this switch is in the ON position.

  • Page 21: Theory Of Operation

    THEORY OF OPERATION AMPLIFIER CARD 2832-202 Refer to the functional block diagram (figure 6) and schematics (figure 7 and 8) while reading this section. INPUT AMPLIFIER CIRCUIT - U1, U2 and U3, are differential input amplifiers, which accept dynamic microphone and Pre-Amplifier Microphone, level signals (0.1 to 50mV) and amplify them. Signals common to both inputs are rejected.

  • Page 22: Battery Charger Card, 2324-202

    THEORY OF OPERATION BATTERY CHARGER CARD, 2324-202 The 2324-202 converts the AC power to a regulated DC voltage to operate the unit and charges the batteries. The charger card consists of Primary and Secondary Circuits, these two separated circuits are connected together through step down transformer. The step down transformer is a split bobbin design with a high insulation level that prevents dangerous leakage currents passing from the primary to secondary winding.

  • Page 23: Functional Block Diagram - Model 2820A-4003

    THEORY OF OPERATION FUNCTIONAL BLOCK DIAGRAM – MODEL 2820A-4003(E)

  • Page 24: Maintenance

    3. Talk from the inner lock with a headset, turn speaker off if there is a switch on the inner lock speaker. You should hear yourself talk. This verifies inner lock operation. Use Amron Model 2460-31R headset.

  • Page 25: Problems And Their Possible Causes

    MAINTENANCE TROUBLE SHOOTING (Continued) Operator Circuit Check (Continued) 4. If you do not hear yourself talk, verify the lock switch is on and the volume controls are set properly. This type of problem could have two causes, a problem between the inner lock jack and the communicator (i.e., a loose connection, broken wire, or a shorted circuit) or a problem within the unit itself.
  • Page 26 (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 is 7.0 amp/hr; the quiescent current of the 2820-4003 is approx. 0.250 amps.

  • Page 27: Drawings

    DRAWINGS & SCHEMATICS GENERAL The following drawings illustrate the electrical and mechanical details of the lock communication unit. The corresponding parts lists for each drawing are detailed in the parts lists section. 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.

  • Page 28: Schematic 2820A-4003

    DRAWINGS & SCHEMATICS SCHEMATIC 2820A-4003...

  • Page 29: Schematic 2820A-4003E

    DRAWINGS & SCHEMATICS SCHEMATIC 2820A-4003E...

  • Page 30: Parts Identifier 2832-202

    DRAWINGS & SCHEMATICS PARTS IDENTIFIER 2832-202...

  • Page 31: Parts Identifier 2324-202

    DRAWINGS & SCHEMATICS PARTS IDENTIFIER 2324-202...

  • Page 32: Parts Identifier - Front Panel 2820A-4003

    DRAWINGS & SCHEMATICS PARTS IDENTIFIER – FRONT PANEL 2820A-4003...

  • Page 33: Parts Identifier - Front Panel 2820A-4003E

    DRAWINGS & SCHEMATICS PARTS IDENTIFIER – FRONT PANEL 2820A-4003E...

  • Page 34: Parts Identifier - Rear Chassis 2820A-4003 & 2820A-4003E

    DRAWINGS & SCHEMATICS PARTS IDENTIFIER – REAR CHASSIS 2820A-4003 & 2820A-4003E...

  • Page 35: Mounting Detail 2820A-4003 & 2820A-4003E

    DRAWINGS & SCHEMATICS MOUNTING DETAIL 2820A-4003 & 2820A-4003E...

  • Page 36: Parts List

    To Order Replacement Parts Contact: Amron international Diving Supply, Inc. 1380 Aspen Way, Vista, California, 92081 U.S.A. Telephone: (760) 208-6500 Fax: (760) 599-3857 Email: sales@amronintl.com...

  • Page 37: Model 2820A-4003 Chamber Communicator

    10.2 Reference Part Number Description 1 ........2832-202-05.......P.C CARD ASSEMBLY 2 ........2820A-4003-400 ......FRONT PANEL ASSEMBLY WIRED 3 ........2820A-4003-500C......CHASSIS ASSEMBLY 4 ........2405-28 ........MICROPHONE PUSH TO TALK 5 ........2-520194-2.........SLIDE TERM. (18/22).032 X .187 6 ........8-32X3/8SSPHP ......SCREW 8-32X 3/8IN SS PH PHILL 7 ........8-32X1/4SSPHP ......SCREW 8-32X1/4IN SS PH PHILL 8 ........8ISW...........WASHER NO 8 INTERNAL STAR S/S...

  • Page 38: Model 2820A-4003E Chamber Communicator W/ Entertainment

    Part Number Description 1 ........2832-202-06.......P.C CARD ASSEMBLY 2........2820A-4003E-400 ......FRONT PANEL ASSEMBLY WIRED 3 ........2820A-4003-500C......CHASSIS ASSEMBLY 4 ........2405-28 ........MICROPHONE PUSH TO TALK 5 ........2-520194-2.........SLIDE TERM. (18/22).032 X .187 6 ........8-32X3/8SSPHP ......SCREW 8-32X 3/8IN SS PH PHILL 7 ........8-32X1/4SSPHP ......SCREW 8-32X1/4IN SS PH PHILL 8 ........8ISW...........WASHER NO 8 INTERNAL STAR S/S...

  • Page 39: 2820A-4003-400M Front Panel Assembly

    2820A-4003-400M FRONT PANEL ASSEMBLY 10.4 Reference Part Number Description 1........2820A-4003-001 ......FRONT PANEL 2820A-4003 3........SA818.........SPEAKER 8 OHM 15 WATT 4........1498-103 ........JACK BANANA BLACK 5........1498-102 ........JACK BANANA RED 6........1498-107 ........JACK BANANA YELLOW 7........ME161-2003.......JACK PHONO W/NYL WSHRS NKL/BLK 8.

  • Page 40: 2820A-4003-500C Chassis Assembly

    10 ........8-32X5/8SSPHP ......SCREW 8-32 5/8IN S/S PH PHIL 11 ........8NUTSSL ........NUT LOCKING 8-32 S/S 12 ........MFCCA-1/2 ........SPONGE1/2CC ADH BLK 42INX70IN 13 ........2823-6002 ........CHARGER CHASSIS ASSEMBLY 14 ........GEE62F-C0........GROMMET EDGING BLACK 15 ........2324-J1-9.0 ........HARNESS 9” POWER ENTRY 2820A-4003-FS FIELD SPARES KIT, 2820A-4003 10.7 Reference Part Number Description Quantity 1 ........SW-201 ........SWITCH TOGGLE ON/OFF DPDT...

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