41
KX-FP207FX-S/FP218FX-S
6.7.5.
Line Amplifier and Side Tone Circuit
1.
Circuit Operation
The reception signal output from the line transformer T101 is input to pin (2) of IC101 via C110 and R109 and then the signal
is amplified at pin (2) of IC101 and sent to the reception system at 0dB.
The transmission signal is output from CN101 (6) and transmitted to T101 via R120 and R119. If the side tone circuit is not
applied, the transmission signal will return to the reception amplifier via C110 and R109. When the side tone circuit is active,
the signal output from IC101 pin (1) passes through R114, R113, C113 and R112 and goes into the amplifier IC101 pin (3).
This circuit is used to cancel the transmission return signal.
Summary of Contents for KX-FP207FX-S
Page 10: ...10 KX FP207FX S FP218FX S 6 Technical Descriptions 6 1 Connection Diagram ...
Page 12: ...12 KX FP207FX S FP218FX S 6 2 1 General Block Diagram ...
Page 14: ...14 KX FP207FX S FP218FX S 6 3 2 Memory Map ...
Page 23: ...23 KX FP207FX S FP218FX S 6 4 2 Block Diagram ...
Page 25: ...25 KX FP207FX S FP218FX S ...
Page 44: ...44 KX FP207FX S FP218FX S 2 Signal path Refer to Check Sheet for Signal Route P 123 ...
Page 68: ...68 KX FP207FX S FP218FX S 11 2 1 2 KX FP218FX S Note The above values are the default values ...
Page 76: ...76 KX FP207FX S FP218FX S Countermeasure ...
Page 77: ...77 KX FP207FX S FP218FX S REFERENCE Test Mode P 58 ...
Page 78: ...78 KX FP207FX S FP218FX S REFERENCE Test Mode P 58 ...
Page 79: ...79 KX FP207FX S FP218FX S REFERENCE Test Mode P 58 ...
Page 80: ...80 KX FP207FX S FP218FX S REFERENCE Test Mode P 58 ...
Page 81: ...81 KX FP207FX S FP218FX S ...
Page 82: ...82 KX FP207FX S FP218FX S ...
Page 83: ...83 KX FP207FX S FP218FX S REFERENCE Test Mode P 58 ...
Page 87: ...87 KX FP207FX S FP218FX S ...
Page 112: ...112 KX FP207FX S FP218FX S ...
Page 119: ...119 KX FP207FX S FP218FX S I O and Pin No Diagram ...
Page 122: ...122 KX FP207FX S FP218FX S 12 5 5 2 NG Example ...
Page 124: ...124 KX FP207FX S FP218FX S ...
Page 129: ...129 KX FP207FX S FP218FX S 12 5 8 2 Troubleshooting Flow Chart ...
Page 135: ...135 KX FP207FX S FP218FX S 12 5 12 Thermal Head Section Note Refer to Thermal Head P 24 ...
Page 136: ...136 KX FP207FX S FP218FX S 13 Service Fixture Tools ...
Page 141: ...141 KX FP207FX S FP218FX S 14 3 2 How to Remove the Thermal Head ...
Page 142: ...142 KX FP207FX S FP218FX S ...
Page 143: ...143 KX FP207FX S FP218FX S 14 3 3 How to Remove the Bottom Frame ...
Page 144: ...144 KX FP207FX S FP218FX S 14 3 4 How to Remove the P C Boards and Speaker ...
Page 145: ...145 KX FP207FX S FP218FX S 14 3 5 How to Remove the Power Supply Board and AC cord ...
Page 146: ...146 KX FP207FX S FP218FX S 14 3 6 How to Remove the Gear Block and Separation Roller ...
Page 147: ...147 KX FP207FX S FP218FX S 14 3 7 How to Remove the Gears Motors and Arms of the Gear Block ...
Page 148: ...148 KX FP207FX S FP218FX S ...
Page 149: ...149 KX FP207FX S FP218FX S 14 3 8 How to Remove the Handset Cradle and Hook Switch Board ...
Page 150: ...150 KX FP207FX S FP218FX S 14 3 9 How to Remove the Back Cover ...
Page 151: ...151 KX FP207FX S FP218FX S 14 3 10 How to Remove the Platen Roller and Lock Lever ...
Page 152: ...152 KX FP207FX S FP218FX S ...
Page 153: ...153 KX FP207FX S FP218FX S 14 3 11 How to Remove the Pickup Roller ...
Page 154: ...154 KX FP207FX S FP218FX S 14 3 12 How to Remove the Operation Panel ...
Page 156: ...156 KX FP207FX S FP218FX S 14 3 13 2 KX FP218FX ...
Page 157: ...157 KX FP207FX S FP218FX S 14 3 14 How to Remove the Separation Holder and Exit Roller ...
Page 159: ...159 KX FP207FX S FP218FX S ...
Page 160: ...160 KX FP207FX S FP218FX S ...
Page 161: ...161 KX FP207FX S FP218FX S 14 3 15 2 Operation Panel Section KX FP207 ...
Page 162: ...162 KX FP207FX S FP218FX S 14 3 15 3 Operation Panel and Mic Board Section KX FP218 ...
Page 177: ...177 KX FP207FX S FP218FX S 16 1 4 Power Supply Board 16 1 5 Interface Board ...
Page 180: ...180 KX FP207FX S FP218FX S 16 3 Test Chart 16 3 1 ITU T No 1 Test chart ...
Page 181: ...181 KX FP207FX S FP218FX S 16 3 2 ITU T No 2 Test Chart ...
Page 182: ...182 KX FP207FX S FP218FX S 16 3 3 Test Chart ...
Page 201: ...201 KX FP207FX S FP218FX S MEMO ...
Page 212: ...212 KX FP207FX S FP218FX S 20 1 2 Operation Panel Section ...
Page 213: ...213 KX FP207FX S FP218FX S 20 1 3 Upper Cabinet Section ...
Page 214: ...214 KX FP207FX S FP218FX S 20 1 4 Back Cover Section ...
Page 215: ...215 KX FP207FX S FP218FX S ...
Page 216: ...216 KX FP207FX S FP218FX S 20 1 5 Lower Cabinet Section ...
Page 217: ...217 KX FP207FX S FP218FX S 20 1 6 Gear Block Section ...
Page 218: ...218 KX FP207FX S FP218FX S ...
Page 219: ...219 KX FP207FX S FP218FX S 20 1 7 Screws ...
Page 220: ...220 KX FP207FX S FP218FX S 20 1 8 Accessories and Packing Materials ...
Page 232: ...232 KX FP207FX S FP218FX S Y F KXFP207FX S KXFP218FX S ...