7.4.5. LINE AMPLIFIER AND SIDE TONE CIRCUIT
1. Circuit Operation
The reception signal output from the line transformer T201 is input to pin (2) of IC204 via C232, R236 and then the signal is
amplified at pin (1) of IC204 and sent to the reception system.
The transmission signal goes through C224, R232 and enters IC204-pin (6), where the signal is amplified. Then, it is output
from pin (7) of IC204 and transmitted to T201 via L230, C237, R244, R243. Without a side tone circuit, the transmission signal
will return to the reception amplifier via R236, C232. When the side tone circuit is active, the signal output from IC204 pin (7)
passes through L230, C237, R241, R233, C233, C225, C223, and R229 and goes into the amplifier IC204 pin (3). This circuit
is used to cancel the transmission return signal.
The TX signal is output to the circuit analog the route from the IC204 7 pin
→
L230
→
C237
→
R244
→
R243
→
T201
→
TEL LINE.
However, if balance is lost in the bridge, a voltage occurs between the IC207 6 pin and 5 pin and a side tone results, because
the balance cannot be maintained completely at all frequencies in the audio range some side tone always occur.
7.4.6. LOW PASS FILTER AND NOTCH FILTER
1. Function
This low pass filter and notch filter attenuates the account signal from the commutator to eliminate influence on the conversation
and communication.
2. Circuit Operation
This low pass filter is an eight-order active filter, and the cutoff frequency is approximately 4 kHz.
NOTCH FILTER has filter pole of account signal frequency.
162
KX-FL612CX / KX-FL612CX-S
Содержание KX-FL612CX
Страница 12: ...3 INSTALLATION 3 1 LOCATION OF CONTROLS 3 1 1 OVERVIEW 12 KX FL612CX KX FL612CX S ...
Страница 13: ...3 1 2 CONTROL PANEL 13 KX FL612CX KX FL612CX S ...
Страница 22: ...3 3 9 SETTING YOUR LOGO The logo can be your company division or name 22 KX FL612CX KX FL612CX S ...
Страница 40: ...5 DISASSEMBLY INSTRUCTIONS 40 KX FL612CX KX FL612CX S ...
Страница 43: ...5 3 HOW TO REMOVE THE OPERATION PANEL ASS Y 43 KX FL612CX KX FL612CX S ...
Страница 44: ...5 4 HOW TO REMOVE THE PICK UP UNIT 44 KX FL612CX KX FL612CX S ...
Страница 45: ...5 5 HOW TO REMOVE THE PICK UP ROLLER 45 KX FL612CX KX FL612CX S ...
Страница 46: ...5 6 HOW TO REMOVE THE OPERATION BOARD 46 KX FL612CX KX FL612CX S ...
Страница 47: ...5 7 HOW TO REMOVE THE LOWER FLAME 5 8 HOW TO REMOVE THE SEPARATION RUBBER 47 KX FL612CX KX FL612CX S ...
Страница 48: ...5 9 HOW TO REMOVE THE TRANSFER ROLLER 48 KX FL612CX KX FL612CX S ...
Страница 49: ...5 10 HOW TO REMOVE THE SEPARATION ROLLER 49 KX FL612CX KX FL612CX S ...
Страница 50: ...5 11 HOW TO REMOVE THE BOTTOM PLATE 5 12 HOW TO REMOVE THE ANALOG BOARD 50 KX FL612CX KX FL612CX S ...
Страница 51: ...5 13 HOW TO REMOVE THE HIGH VOLTAGE POWER BOARD 5 14 HOW TO REMOVE THE LASER UNIT 51 KX FL612CX KX FL612CX S ...
Страница 52: ...5 15 HOW TO REMOVE THE FAN UNIT 5 16 HOW TO REMOVE THE LOW VOLTAGE POWER BOARD 52 KX FL612CX KX FL612CX S ...
Страница 53: ...5 17 HOW TO REMOVE THE SOLENOID 5 18 HOW TO REMOVE THE HANDSET HOLDER 53 KX FL612CX KX FL612CX S ...
Страница 54: ...5 19 HOW TO REMOVE THE MAIN MOTOR 54 KX FL612CX KX FL612CX S ...
Страница 55: ...5 20 HOW TO REMOVE THE FUSER UNIT 55 KX FL612CX KX FL612CX S ...
Страница 56: ...5 21 HOW TO REMOVE THE CIS 56 KX FL612CX KX FL612CX S ...
Страница 58: ...5 23 INSTALLATION POSITION OF THE LEAD 58 KX FL612CX KX FL612CX S ...
Страница 90: ...6 5 7 3 DARK OR WHITE HORIZONTAL LINE CROSS REFERENCE HIGH VOLTAGE SECTION P 140 90 KX FL612CX KX FL612CX S ...
Страница 92: ...6 5 7 5 BLACK PRINT CROSS REFERENCE HIGH VOLTAGE SECTION P 140 LSU SECTION P 137 92 KX FL612CX KX FL612CX S ...
Страница 93: ...6 5 7 6 LIGHT PRINT CROSS REFERENCE HIGH VOLTAGE SECTION P 140 93 KX FL612CX KX FL612CX S ...
Страница 94: ...6 5 7 7 BLACK DENSITY IS LIGHT OR UNEVEN CROSS REFERENCE HIGH VOLTAGE SECTION P 140 94 KX FL612CX KX FL612CX S ...
Страница 95: ...6 5 7 8 BLANK PRINT 6 5 7 9 BLACK OR WHITE POINT 95 KX FL612CX KX FL612CX S ...
Страница 97: ...6 5 8 3 SKEW 97 KX FL612CX KX FL612CX S ...
Страница 103: ...CROSS REFERENCE MOTOR SECTION P 135 103 KX FL612CX KX FL612CX S ...
Страница 104: ...6 5 9 2 SKEW ADF 104 KX FL612CX KX FL612CX S ...
Страница 106: ...6 5 9 5 THE RECEIVED OR COPIED DATA IS EXPANDED 106 KX FL612CX KX FL612CX S ...
Страница 107: ...6 5 9 6 BLACK OR WHITE VERTICAL LINE IS COPIED 107 KX FL612CX KX FL612CX S ...
Страница 108: ...6 5 9 7 AN ABNORMAL IMAGE IS COPIED CROSS REFERENCE CIS Contact Image Sensor SECTION P 138 108 KX FL612CX KX FL612CX S ...
Страница 117: ...117 KX FL612CX KX FL612CX S ...
Страница 119: ...Note If the problem remains see the following Countermeasure flow chart 119 KX FL612CX KX FL612CX S ...
Страница 120: ...CROSS REFERENCE TEST FUNCTIONS P 64 120 KX FL612CX KX FL612CX S ...
Страница 121: ...CROSS REFERENCE TEST FUNCTIONS P 64 121 KX FL612CX KX FL612CX S ...
Страница 122: ...CROSS REFERENCE TEST FUNCTIONS P 64 122 KX FL612CX KX FL612CX S ...
Страница 123: ...CROSS REFERENCE TEST FUNCTIONS P 64 123 KX FL612CX KX FL612CX S ...
Страница 124: ...124 KX FL612CX KX FL612CX S ...
Страница 125: ...125 KX FL612CX KX FL612CX S ...
Страница 126: ...CROSS REFERENCE TEST FUNCTIONS P 64 126 KX FL612CX KX FL612CX S ...
Страница 135: ...6 5 13 6 MOTOR SECTION 6 5 13 6 1 ENGINE MOTOR 135 KX FL612CX KX FL612CX S ...
Страница 136: ...6 5 13 6 2 ADF MOTOR 136 KX FL612CX KX FL612CX S ...
Страница 137: ...6 5 13 7 LSU SECTION CROSS REFERENCE LSU Laser Scanning Unit SECTION P 173 137 KX FL612CX KX FL612CX S ...
Страница 138: ...6 5 14 CIS Contact Image Sensor SECTION CROSS REFERENCE TEST FUNCTIONS P 64 138 KX FL612CX KX FL612CX S ...
Страница 140: ...6 5 16 HIGH VOLTAGE SECTION 140 KX FL612CX KX FL612CX S ...
Страница 141: ...141 KX FL612CX KX FL612CX S ...
Страница 142: ...142 KX FL612CX KX FL612CX S ...
Страница 145: ...6 5 17 2 TROUBLESHOOTING FLOW CHART 145 KX FL612CX KX FL612CX S ...
Страница 147: ...7 CIRCUIT OPERATIONS 7 1 CONNECTION DIAGRAM 147 KX FL612CX KX FL612CX S ...
Страница 149: ...149 KX FL612CX KX FL612CX S ...
Страница 167: ...7 7 1 2 ENGINE MOTOR DRIVE CIRCUIT 167 KX FL612CX KX FL612CX S ...
Страница 173: ...7 10 LSU Laser Scanning Unit SECTION 173 KX FL612CX KX FL612CX S ...
Страница 174: ...174 KX FL612CX KX FL612CX S ...
Страница 181: ...181 KX FL612CX KX FL612CX S ...
Страница 202: ...8 1 8 TIMING CHART When Printing Two Sheets of Paper BASIC 202 KX FL612CX KX FL612CX S ...
Страница 203: ...8 1 9 Timing Chart Initializing Long 203 KX FL612CX KX FL612CX S ...
Страница 204: ...8 1 10 Timing Chart when the registration sensor is turned OFF then ON during initializing 204 KX FL612CX KX FL612CX S ...
Страница 205: ...8 2 TERMINAL GUIDE OF THE ICs TRANSISTORS AND DIODES 205 KX FL612CX KX FL612CX S ...
Страница 209: ...8 4 1 NG EXAMPLE 209 KX FL612CX KX FL612CX S ...
Страница 215: ...215 KX FL612CX KX FL612CX S ...
Страница 216: ...8 6 TEST CHART 8 6 1 ORIGINAL TEST CHART 216 KX FL612CX KX FL612CX S ...
Страница 217: ...8 6 2 ITU T No 1 TEST CHART 217 KX FL612CX KX FL612CX S ...
Страница 218: ...8 6 3 ITU T No 2 TEST CHART 218 KX FL612CX KX FL612CX S ...
Страница 219: ...9 FIXTURES AND TOOLS 219 KX FL612CX KX FL612CX S ...
Страница 220: ...10 CABINET MECHANICAL AND ELECTRICAL PARTS LOCATION 10 1 GENERAL SECTION 220 KX FL612CX KX FL612CX S ...
Страница 221: ...10 2 OPERATION COVER SECTION 1 221 KX FL612CX KX FL612CX S ...
Страница 222: ...10 3 OPERATION COVER SECTION 2 222 KX FL612CX KX FL612CX S ...
Страница 223: ...10 4 OPERATION COVER SECTION 3 223 KX FL612CX KX FL612CX S ...
Страница 224: ...10 5 PICK UP SECTION 224 KX FL612CX KX FL612CX S ...
Страница 225: ...10 6 FUSER SECTION 225 KX FL612CX KX FL612CX S ...
Страница 226: ...10 7 UPPER MAIN CABINET SECTION 226 KX FL612CX KX FL612CX S ...
Страница 227: ...10 8 LOWER MAIN CABINET SECTION 1 227 KX FL612CX KX FL612CX S ...
Страница 228: ...10 9 LOWER MAIN CABINET SECTION 2 228 KX FL612CX KX FL612CX S ...
Страница 229: ...10 10 LOWER CABINET SECTION 3 229 KX FL612CX KX FL612CX S ...
Страница 230: ...10 11 ACTUAL SIZE OF SCREWS AND WASHER 230 KX FL612CX KX FL612CX S ...
Страница 231: ...11 ACCESSORIES AND PACKING MATERIALS 231 KX FL612CX KX FL612CX S ...
Страница 243: ...Memo 243 KX FL612CX KX FL612CX S ...
Страница 266: ...266 KX FL612CX KX FL612CX S HI Q KXFL612CX KXFL612CXS ...