43
KX-FP215
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.
6.7.6.
Auto Disconnect Circuit
1.
Function
This circuit is used to detect that the telephone connected in parallel to the same line is OFF-hook while the unit picks up the
line. If this detection circuit is activated when TAM is being delivered, the delivery stops and the circuit is automatically
released.
2.
Circuit Operation
If the line is picked up, C141 is charged by following the path shown below.
D109 (+)
→
R157
→
D107
→
C141
When the electric potential difference between the base and emitter of Q108 becomes less than about 0.3V, Q108 and Q107
and PC104 turn off, then the IC501 pin 22 becomes a high level.
In this condition, if a telephone connected in parallel goes into OFF-hook status, the base of Q108 becomes low.
On the other hand, the emitter of Q108 goes down slowly because the capacitor (C141) is charged. Q108 turns on when the
electric
potential difference between the base and emitter of Q108 becomes more than 0.6 V while being charged.
When Q108 turns on, Q107 and PC104 also turn on, then the IC501 pin 22 becomes a low level.
Содержание KX-FP215
Страница 12: ...12 KX FP215 6 Technical Descriptions 6 1 Connection Diagram ...
Страница 14: ...14 KX FP215 6 2 1 General Block Diagram ...
Страница 16: ...16 KX FP215 6 3 2 Memory Map ...
Страница 25: ...25 KX FP215 6 4 2 Block Diagram ...
Страница 27: ...27 KX FP215 ...
Страница 40: ...40 KX FP215 b Redundancy Compression Process Coding Mode This unit uses one dimensional MH format ...
Страница 66: ...66 KX FP215 11 2 The Example of the Printed List 11 2 1 User Mode Note The above values are the default values ...
Страница 67: ...67 KX FP215 11 2 2 Service Mode Settings Note The above values are the default values ...
Страница 74: ...74 KX FP215 Countermeasure ...
Страница 75: ...75 KX FP215 REFERENCE Test Mode P 58 ...
Страница 76: ...76 KX FP215 REFERENCE Test Mode P 58 ...
Страница 77: ...77 KX FP215 REFERENCE Test Mode P 58 ...
Страница 78: ...78 KX FP215 REFERENCE Test Mode P 58 ...
Страница 79: ...79 KX FP215 ...
Страница 80: ...80 KX FP215 ...
Страница 81: ...81 KX FP215 REFERENCE Test Mode P 58 ...
Страница 85: ...85 KX FP215 ...
Страница 110: ...110 KX FP215 ...
Страница 117: ...117 KX FP215 I O and Pin No Diagram ...
Страница 119: ...119 KX FP215 Other NG example while the power is ON and the LCD displays the following ...
Страница 120: ...120 KX FP215 12 5 5 2 NG Example ...
Страница 124: ...124 KX FP215 Note Check to the SP Phone Rx Tx signal routes Refer to Check Sheet for Signal Route P 121 ...
Страница 126: ...126 KX FP215 12 5 8 2 Troubleshooting Flow Chart ...
Страница 131: ...131 KX FP215 12 5 11 CIS Contact Image Sensor Section REFERENCE 1 Test Mode P 58 Refer to Scanning Block P 28 ...
Страница 132: ...132 KX FP215 12 5 12 Thermal Head Section Note Refer to Thermal Head P 26 ...
Страница 133: ...133 KX FP215 13 Service Fixture Tools ...
Страница 137: ...137 KX FP215 14 3 Disassembly Procedure 14 3 1 How to Remove the Image Sensor CIS ...
Страница 138: ...138 KX FP215 14 3 2 How to Remove the Thermal Head ...
Страница 139: ...139 KX FP215 ...
Страница 140: ...140 KX FP215 14 3 3 How to Remove the Bottom Frame ...
Страница 141: ...141 KX FP215 14 3 4 How to Remove the P C Boards and Speaker ...
Страница 142: ...142 KX FP215 14 3 5 How to Remove the Power Supply Board and AC cord ...
Страница 143: ...143 KX FP215 14 3 6 How to Remove the Gear Block and Separation Roller ...
Страница 144: ...144 KX FP215 14 3 7 How to Remove the Gears Motors and Arms of the Gear Block ...
Страница 145: ...145 KX FP215 ...
Страница 146: ...146 KX FP215 14 3 8 How to Remove the Handset Cradle and Hook Switch Board ...
Страница 147: ...147 KX FP215 14 3 9 How to Remove the Back Cover ...
Страница 148: ...148 KX FP215 14 3 10 How to Remove the Platen Roller and Lock Lever ...
Страница 149: ...149 KX FP215 ...
Страница 150: ...150 KX FP215 14 3 11 How to Remove the Pickup Roller ...
Страница 151: ...151 KX FP215 14 3 12 How to Remove the Operation Panel ...
Страница 152: ...152 KX FP215 14 3 13 How to Remove the Operation Board and LCD ...
Страница 153: ...153 KX FP215 14 3 14 How to Remove the Separation Holder and Exit Roller ...
Страница 154: ...154 KX FP215 14 3 15 Installation Position of the Lead Wires 14 3 15 1 Lower Section ...
Страница 155: ...155 KX FP215 ...
Страница 156: ...156 KX FP215 ...
Страница 157: ...157 KX FP215 14 3 15 2 Operation Panel and Mic Board Section ...
Страница 166: ...166 KX FP215 15 2 3 4 Copying Note See Sensor Locations in Sensors and Switches P 31 REFERENCE Sensor Section P 129 ...
Страница 172: ...172 KX FP215 16 1 4 Power Supply Board 16 1 5 Interface Board ...
Страница 174: ...174 KX FP215 16 3 Test Chart 16 3 1 ITU T No 1 Test chart ...
Страница 175: ...175 KX FP215 16 3 2 ITU T No 2 Test Chart ...
Страница 176: ...176 KX FP215 16 3 3 Test Chart ...
Страница 177: ...177 KX FP215 Memo ...
Страница 198: ...198 KX FP215 20 1 2 Operation Panel Section ...
Страница 199: ...199 KX FP215 20 1 3 Upper Cabinet Section ...
Страница 200: ...200 KX FP215 20 1 4 Back Cover Section ...
Страница 201: ...201 KX FP215 ...
Страница 202: ...202 KX FP215 20 1 5 Lower Cabinet Section ...
Страница 203: ...203 KX FP215 20 1 6 Gear Block Section ...
Страница 204: ...204 KX FP215 20 1 7 Screws ...
Страница 205: ...205 KX FP215 20 1 8 Accessories and Packing Materials ...
Страница 220: ...8 KX FP215 MEMO ...