39
KX-FT982LS-B / KX-FT984LS-B / KX-FT988LS-B
6.7.5.
Line Amplifier and Side Tone Circuits
1.
Circuit Operation
The reception signal received as output from line transformer T101 is given as input to C108, R109 and IC101(2).
Then it is input to the reception system at an amplifier gain of 2.5 dB from pin (2).
The transmission signal is input from CN101 pin (6), and output to the TEL line through T101. Without a side tone circuit, the
transmission signal would return to the reception amplifier via C113 and R114. Here, the signal output from CN101 pin (6)
passes through C113, R113, R112, C109 and R110, and enters the amplifier IC101 pin (2). This is used to cancel the return
portion of the transmission signal. This is the side tone circuit.
Содержание KX-FT982LS-B
Страница 2: ...2 KX FT982LS B KX FT984LS B KX FT988LS B ...
Страница 12: ...12 KX FT982LS B KX FT984LS B KX FT988LS B 6 Technical Descriptions 6 1 Connection Diagram ...
Страница 14: ...14 KX FT982LS B KX FT984LS B KX FT988LS B 6 2 1 General Block Diagram ...
Страница 22: ...22 KX FT982LS B KX FT984LS B KX FT988LS B 6 4 2 Block Diagram ...
Страница 24: ...24 KX FT982LS B KX FT984LS B KX FT988LS B ...
Страница 72: ...72 KX FT982LS B KX FT984LS B KX FT988LS B Countermeasure ...
Страница 73: ...73 KX FT982LS B KX FT984LS B KX FT988LS B REFERENCE Test Mode P 55 ...
Страница 74: ...74 KX FT982LS B KX FT984LS B KX FT988LS B REFERENCE Test Mode P 55 ...
Страница 75: ...75 KX FT982LS B KX FT984LS B KX FT988LS B REFERENCE Test Mode P 55 ...
Страница 76: ...76 KX FT982LS B KX FT984LS B KX FT988LS B REFERENCE Test Mode P 55 ...
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Страница 79: ...79 KX FT982LS B KX FT984LS B KX FT988LS B REFERENCE Test Mode P 55 ...
Страница 83: ...83 KX FT982LS B KX FT984LS B KX FT988LS B ...
Страница 109: ...109 KX FT982LS B KX FT984LS B KX FT988LS B NG Wave pattern Note Refer to NG Example P 114 ...
Страница 111: ...111 KX FT982LS B KX FT984LS B KX FT988LS B I O and Pin No Diagram ...
Страница 114: ...114 KX FT982LS B KX FT984LS B KX FT988LS B 12 5 6 2 NG Example ...
Страница 116: ...116 KX FT982LS B KX FT984LS B KX FT988LS B ...
Страница 121: ...121 KX FT982LS B KX FT984LS B KX FT988LS B 12 5 9 2 Troubleshooting Flow Chart ...
Страница 127: ...127 KX FT982LS B KX FT984LS B KX FT988LS B 12 5 13 Thermal Head Section Refer to Thermal Head P 23 ...
Страница 128: ...128 KX FT982LS B KX FT984LS B KX FT988LS B 13 Service Fixture Tools ...
Страница 131: ...131 KX FT982LS B KX FT984LS B KX FT988LS B 14 1 2 How to Remove the Cutter Unit KX FT984 KX FT988 only ...
Страница 132: ...132 KX FT982LS B KX FT984LS B KX FT988LS B 14 1 3 How to Remove the Lock Lever and Thermal Head ...
Страница 133: ...133 KX FT982LS B KX FT984LS B KX FT988LS B 14 2 Lower Cabinet Section 14 2 1 How to Remove the Bottom Frame ...
Страница 134: ...134 KX FT982LS B KX FT984LS B KX FT988LS B 14 2 2 How to Remove the P C Boards and Power Cord ...
Страница 136: ...136 KX FT982LS B KX FT984LS B KX FT988LS B 14 3 Operation Panel Section 14 3 1 How to Remove the Operation Panel Block ...
Страница 137: ...137 KX FT982LS B KX FT984LS B KX FT988LS B 14 3 2 How to Remove the Operation Board LCD and Platen Roller ...
Страница 138: ...138 KX FT982LS B KX FT984LS B KX FT988LS B 14 3 3 How to Remove the Separation Rubber Flap ...
Страница 139: ...139 KX FT982LS B KX FT984LS B KX FT988LS B 14 4 Installation Position of the Lead Wires ...
Страница 140: ...140 KX FT982LS B KX FT984LS B KX FT988LS B ...
Страница 148: ...148 KX FT982LS B KX FT984LS B KX FT988LS B 15 2 3 4 Copying REFERENCE Sensor Section P 124 ...
Страница 153: ...153 KX FT982LS B KX FT984LS B KX FT988LS B 16 1 4 Power Supply Board ...
Страница 155: ...155 KX FT982LS B KX FT984LS B KX FT988LS B 16 3 Test Chart 16 3 1 ITU T No 1 Test Chart ...
Страница 156: ...156 KX FT982LS B KX FT984LS B KX FT988LS B 16 3 2 ITU T No 2 Test Chart ...
Страница 157: ...157 KX FT982LS B KX FT984LS B KX FT988LS B MEMO ...
Страница 170: ...170 KX FT982LS B KX FT984LS B KX FT988LS B MEMO ...
Страница 180: ...180 KX FT982LS B KX FT984LS B KX FT988LS B 20 1 1 Operation Panel Section KX FT982 KX FT984 ...
Страница 181: ...181 KX FT982LS B KX FT984LS B KX FT988LS B 20 1 2 Operation Panel Section KX FT988 ...
Страница 182: ...182 KX FT982LS B KX FT984LS B KX FT988LS B 20 1 3 Upper Cabinet Section ...
Страница 183: ...183 KX FT982LS B KX FT984LS B KX FT988LS B 20 1 4 Lower Cabinet Section ...
Страница 184: ...184 KX FT982LS B KX FT984LS B KX FT988LS B 20 1 5 Gear Block Section ...
Страница 185: ...185 KX FT982LS B KX FT984LS B KX FT988LS B 20 1 6 Screws ...
Страница 186: ...186 KX FT982LS B KX FT984LS B KX FT988LS B 20 1 7 Accessories and Packing Materials ...