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Amron 2820A-4003, Instruction Manual, Page: 1 / 40

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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:  

[email protected]

 

Website: www.amronintl.com 

 

Copyright © 2009, Amron International, Inc.  

Revised August 2010 

Summary of Contents for 2820A-4003

Page 1: ...nse 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: ...ral 5 1 Operator Controls 5 2 Operator Connections 5 3 Drawing Operator Connections P T T Microphone 5 4 Drawing Operator Connections Headset 5 5 Drawing Chamber Connections 5 6 Installation Operation...

Page 3: ...003 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 10 General 10 1 Model 2820A 4003 Cha...

Page 4: ...External Range 9 Volts Min 18 Volts Maximum Battery Current 3 Amps Peak Sensitivity input 16 mVRMS Output Power Peak 4 Ohm Load 12 Vdc 20 Watts Audio Battery Backup Life 20 Hours Operating Voltage 115...

Page 5: ...ype system The operator monitors the chamber conversations via a talkback speaker mounted on the front panel of the unit The operator can talk to the occupants by using the hand held microphone or by...

Page 6: ...l 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 The 2820A 4003E has a sep...

Page 7: ...GENERAL INFORMATION FRONT PANEL CONTROLS MODEL 2820A 4003 2 3 4...

Page 8: ...GENERAL INFORMATION FRONT PANEL CONTROLS MODEL 2820A 4003E 2 4 5...

Page 9: ...cone three foot SJO cord Model 3115 Chamber Comm Box Decompression chamber communication box Same as Model 3113 also has a speaker ON OFF switch Model 3125 Chamber Combo Box Decompression chamber comb...

Page 10: ...er Decompression chamber entertainment speaker Speaker is 15 watt 8 inch music quality mylar impregnated cloth cone Includes 6 each headset jacks for mini phone plugs Model 2460 31R Headset Headset wi...

Page 11: ...r alterations SERVICE POLICY 4 2 AMRON INTERNATIONAL encourages owners of equipment to call 760 208 6500 for assistance if problems are encountered Every effort will be made to assist in solving your...

Page 12: ...ating in full duplex 4 wire mode In the full duplex mode this switch allows the operator to interrupt all locks with a priority message Volume Controls Controls the volume for the operator adjusts the...

Page 13: ...ting time left from the time the light began to blink 3 A steady red light indicates battery voltage below reliable operating level First function to fail will be communications to the chamber PTT in...

Page 14: ...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 Ent...

Page 15: ...CONTROLS CONNECTIONS 2820A 4003 PUSH TO TALK MICROPHONE 5 4 12...

Page 16: ...CONTROLS CONNECTIONS 2820A 4003 HEADSET CONNECTION 5 5 13...

Page 17: ...CONTROLS CONNECTIONS SCHEMATIC CONNECTION MODEL 2820A 4003 TO CHAMBER 5 6 14...

Page 18: ...ct to either jack Unit is now ready for test functionally test unit as described par 6 4 Install unit into panel cutout and fasten with four brass thumbscrews provided PUSH TO TALK MICROPHONE CONNECTI...

Page 19: ...volume level to the chamber This adjustment should be made to optimize the volume levels during initial installation Confirm that the inner lock on off switch works properly When off all communicatio...

Page 20: ...tion On steady light when unit is on indicates battery is in good charge state Blink blinking light indicates battery level is approaching a low level approximately 3 hours of operating time left Off...

Page 21: ...or operator through relays K1 K2 K3 and K4 PRE AMP MIC DETECTION U5 is voltage comparator IC This circuit detects the microphone resistance and if necessary attenuates the diver signal using Q7 Q8 and...

Page 22: ...replacing the fuse and returning the unit to the field The Secondary Circuit receives low voltage 20V AC from transformer secondary winding then regulates the voltage at 14V DC It automatically reduce...

Page 23: ...THEORY OF OPERATION FUNCTIONAL BLOCK DIAGRAM MODEL 2820A 4003 E 7 4 20...

Page 24: ...d to do a functional check of your communicator using a headset Quick full duplex check this brief procedure checks communicator functions in the simulcom mode set all volume controls at mid scale and...

Page 25: ...K2 on 2820 200E or with the speaker in the inner lock 9 Talk to the outer lock with someone inside to check loudspeaker volume levels Use push to talk function Use same trouble shooting procedure as...

Page 26: ...ry voltage 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 vo...

Page 27: ...s revision sheet appears in the manual immediately after the drawings It lists the drawing number reference designator of the part or parts involved and a description of the revision and the effective...

Page 28: ...DRAWINGS SCHEMATICS SCHEMATIC 2820A 4003 9 2 25...

Page 29: ...DRAWINGS SCHEMATICS SCHEMATIC 2820A 4003E 9 3 26...

Page 30: ...DRAWINGS SCHEMATICS PARTS IDENTIFIER 2832 202 9 4 27...

Page 31: ...DRAWINGS SCHEMATICS PARTS IDENTIFIER 2324 202 9 5 28...

Page 32: ...DRAWINGS SCHEMATICS PARTS IDENTIFIER FRONT PANEL 2820A 4003 9 6 29...

Page 33: ...DRAWINGS SCHEMATICS PARTS IDENTIFIER FRONT PANEL 2820A 4003E 9 7 30...

Page 34: ...DRAWINGS SCHEMATICS PARTS IDENTIFIER REAR CHASSIS 2820A 4003 2820A 4003E 9 8 31...

Page 35: ...DRAWINGS SCHEMATICS MOUNTING DETAIL 2820A 4003 2820A 4003E 9 9 32...

Page 36: ...new part is the recommended replacement part for all units the old part is not listed in the revision listing To Order Replacement Parts Contact Amron international Diving Supply Inc 1380 Aspen Way Vi...

Page 37: ...FWF WASHER FLAT FIBER NO 8 10 2890 05 BATTERY 12VDC SLIDE TERM GEL 11 8 32X3 4KTSB SCREW KNURLED THUMB BRASS 12 2820A 4003 MANUAL OPERATIONS MANUAL 13 MS 3106A 20 27S MS CONN CABLE 4 PIN F 14 MS 3057...

Page 38: ...R S S 9 8FWF WASHER FLAT FIBER NO 8 10 2890 05 BATTERY 12VDC SLIDE TERM GEL 11 8 32X3 4KTSB SCREW KNURLED THUMB BRASS 12 2820A 4003 MANUAL OPERATIONS MANUAL 13 MS 3106A 20 27S MS CONN CABLE 14 PIN F 1...

Page 39: ...0X1 25HSBHC SCREW 1 4 20 X 1 25IN S S 20 1 4FWSS WASHER FLAT 1 4 304 S S 21 M 2786 NUT A B POTS 2820A 4003E 400M FRONT PANEL ASSEMBLY ENTERTAINMENT 10 5 Reference Part Number Description 1 2820A 4003E...

Page 40: ...MBLY 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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