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Summary of Contents for KB-112

Page 1: ...KB 112 Speaker Station INSTRUCTION and SERVICE MANUAL I i jliClear Com IFIintercom Systems 945 Camelia St Berkeley California 94710 510 527 6666 Clear Com 810027 8 15 88 REV C...

Page 2: ...II Installation 3 III Operation 4 IV Parts Listing 7 V Technical Theory of Operation 7 VI Specifications 9 Illustrations Figure 1 KB 112 Mounting Dimensions 2 Figure 2 Portable Unit Connection 2 Figu...

Page 3: ...e control the auxiliary audio source The station KB 112 speaker and or mic can be accepts an unbalanced line level activated by all other Clear Com singal from audio gear such as mic stations on the s...

Page 4: ...EOX 0 5 4 6 5 KB 12 qoup MOUNVT PIG DIMENSIONVS Figure 2 Portable Box Connection I 11 Rm ov ohire heade PC 0 i IG P PC l w M CNIG DIMNSI BOck Fin re 2 PnrableBox nne tn INTERCOM I 1 p ofpp backing r...

Page 5: ...has cut outs on each side for hanging it in any Pin 1 Chassis Ground position from the wall a con Pin 2 Program Input sole or where desired or no connection Pin 3 Intercom Audio Use standard two cond...

Page 6: ...the stations that are communicating on Call button ALTERNATE OPERATING MODES At the factory Clear Com sets the KB 112 for the NORMAL operating mode To pre set the KB 112 for Remote Page Remote Listen...

Page 7: ...ght intercom channel press this and speaker button As long as you press it the mic is on and the red LED above it lights up indicating that Distance from Mouth to Mic other operators can hear you A fo...

Page 8: ...audio source in addi ble to input program to the KB tion to the intercom audio Simply 112 Connect the hot lead from feed an unbalanced line level sig your source to terminal 2 on the nal to the KB 11...

Page 9: ...Box 240010 Rubber foot 1 2 square 8 P Box 810027 Instruction Manual 1 V THEORY OF REMOTE STATION OPERATION Refer to the KB 112 Schematic last dB loss in audio level page when reading this section for...

Page 10: ...edback button S2 turns on transistor Q6 loop of IC1 1 thus turning on the applying about 11 volts to the mic pre amp intercom line A receive call sig nal entering a KB 112 is detected By changing the...

Page 11: ...emote con Mic Type electret trol 200 ma short circuit Voltage Range 12 32v 28v nominal SPEAKER AMPLIFIEU Line Level I dB max Speaker Type 3 round 16 ohm Signal Voltage 11VDC on audio line Power Output...

Page 12: ...0 _ J__I 7 4 _ s 0 0 t XJ7G i l t ti0 X C 4 111 X ri t2 U t Hl z J rt a 9 e r r _ _ J 1 Nf L_ E C3 2 C o Fl sll M WSWE...

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