7.9.5. 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 C112 and R112 and then the signal
is amplified at pin (1) of IC101 and sent to the reception system at 11.6dB.
The transmission signal goes through C571 and R579 and enters IC511-pin (2), where the signal is amplified to about 24.8dB.
Then, it is output from pin (1) of IC101 and transmitted to T101 via C125 and R121. If the side tone circuit is not applied, the
transmission signal will return to the reception amplifier via C112 and R112. When the side tone circuit is active, the signal
output from IC101 pin (1) passes through C125, R123, C122, C115 and R115 and goes into the amplifier IC101 pin (3). This
circuit is used to cancel the transmission return signal.
7.9.6. 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.
2. Circuit Operation
If the line is picked up, C158 is charged by the following path shown below.
Tip (Ring)
→
D107
→
R160
→
D108
→
R161
→
Q110
→
PC103
If a telephone connected in parallel goes into OFF-HOOK status, the base of Q110 becomes low and PC103 turns OFF.
When the line is connected, Q110 and PC103 turn on, then pin (97) of IC505 (MODEM) on the digital board becomes low. On
the other hand, When the line is disconnected, Q110 and PC103 turn off, then the pin (97) of IC505 (MODEM) becomes high.
7.9.7. CPC (Calling Party Control) DETECTION CIRCUIT
1. Function
This circuit detects the signal (cuts the current ) output from the converter when the other party finishes ICM recording and goes
into the ON-HOOK status.
TAD detects this signal and disconnects the line. When the TAD is operating, pin (4) of PC105 becomes a low level.
While detecting the CPC signal, pin (4) of PC105 becomes a high level. When the CPC signal is detected, the TAD operation
stops and the line is disconnected.
148
KX-FP362CX
Содержание KX-FP362CX
Страница 21: ...4 1 2 COMPONENT LOCATIONS 21 KX FP362CX ...
Страница 31: ...5 2 DISASSEMBLY PROCEDURE 5 2 1 HOW TO REMOVE THE PAPER TRAY AND RECORDING PAPER SUPPORT 31 KX FP362CX ...
Страница 32: ...5 2 2 HOW TO REMOVE THE OPERATION PANEL BLOCK 32 KX FP362CX ...
Страница 33: ...5 2 3 HOW TO REMOVE THE OPERATION BOARD AND LCD 33 KX FP362CX ...
Страница 34: ...5 2 4 HOW TO REMOVE THE IMAGE SENSOR CIS 34 KX FP362CX ...
Страница 35: ...5 2 5 HOW TO REMOVE THE THERMAL HEAD 35 KX FP362CX ...
Страница 36: ...5 2 6 HOW TO REMOVE THE PLATEN ROLLER AND BACK COVER 36 KX FP362CX ...
Страница 37: ...5 2 7 HOW TO REMOVE THE PICKUP ROLLER 37 KX FP362CX ...
Страница 38: ...5 2 8 HOW TO REMOVE THE CASSETTE LEVER 38 KX FP362CX ...
Страница 39: ...5 2 9 HOW TO REMOVE THE BOTTOM FRAME 39 KX FP362CX ...
Страница 40: ...5 2 10 HOW TO REMOVE THE DIGITAL ANALOG POWER SUPPLY SENSOR BOARDS AND AC INLET 40 KX FP362CX ...
Страница 41: ...5 2 11 HOW TO REMOVE THE MOTOR BLOCK AND SEPARATION ROLLER 41 KX FP362CX ...
Страница 42: ...5 2 12 HOW TO REMOVE THE GEARS OF MOTOR BLOCK 42 KX FP362CX ...
Страница 43: ...5 3 INSTALLATION POSITION OF THE LEAD WIRES 43 KX FP362CX ...
Страница 55: ...6 5 THE EXAMPLE OF THE PRINTED LIST 6 5 1 USER MODE Note The above values are the default values 55 KX FP362CX ...
Страница 56: ...6 5 2 SREVICE MODE SETTINGS Note The above values are the default values 56 KX FP362CX ...
Страница 70: ...70 KX FP362CX ...
Страница 84: ...84 KX FP362CX ...
Страница 85: ...CROSS REFERENCE TEST FUNCTIONS P 49 85 KX FP362CX ...
Страница 86: ...CROSS REFERENCE TEST FUNCTIONS P 49 86 KX FP362CX ...
Страница 87: ...CROSS REFERENCE TEST FUNCTIONS P 49 87 KX FP362CX ...
Страница 88: ...CROSS REFERENCE TEST FUNCTIONS P 49 88 KX FP362CX ...
Страница 89: ...89 KX FP362CX ...
Страница 90: ...90 KX FP362CX ...
Страница 91: ...CROSS REFERENCE TEST FUNCTIONS P 49 91 KX FP362CX ...
Страница 95: ...95 KX FP362CX ...
Страница 99: ...I O and Pin No Diagram 99 KX FP362CX ...
Страница 100: ...6 6 7 1 CHECK THE STATUS OF THE DIGITAL BOARD CROSS REFERENCE NG Wave pattern Refer to NG EXAMPLE P 97 100 KX FP362CX ...
Страница 103: ...6 6 7 3 NG EXAMPLE 103 KX FP362CX ...
Страница 107: ...Note Refer to CHECK SHEET P 104 and TEST FUNCTIONS P 49 107 KX FP362CX ...
Страница 109: ...6 6 10 2 TROUBLESHOOTING FLOW CHART 109 KX FP362CX ...
Страница 115: ...6 6 14 THERMAL HEAD SECTION Refer to THERMAL HEAD P 129 115 KX FP362CX ...
Страница 116: ...7 CIRCUIT OPERATIONS 7 1 CONNECTION DIAGRAM 116 KX FP362CX ...
Страница 118: ...7 2 1 GENERAL BLOCK DIAGRAM 118 KX FP362CX ...
Страница 120: ...7 3 2 MEMORY MAP 120 KX FP362CX ...
Страница 128: ...7 4 2 BLOCK DIAGRAM 128 KX FP362CX ...
Страница 131: ...TIMING CHART i Print Duty 50 or less ii Print Duty more than 50 131 KX FP362CX ...
Страница 143: ...b Redundancy Compression Process Coding Mode This unit uses one dimensional MH format 143 KX FP362CX ...
Страница 150: ...150 KX FP362CX ...
Страница 157: ...8 REFERENCE MATERIAL DATA 8 1 TERMINAL GUIDE OF THE ICs TRANSISTORS AND DIODES 157 KX FP362CX ...
Страница 160: ...8 3 TEST CHART 8 3 1 ITU T No 1 TEST CHART 160 KX FP362CX ...
Страница 161: ...8 3 2 ITU T No 2 TEST CHART 161 KX FP362CX ...
Страница 162: ...9 FIXTURES AND TOOLS 162 KX FP362CX ...
Страница 163: ...10 CABINET MECHANICAL AND ELECTRICAL PARTS LOCATION 10 1 GENERAL SECTION 163 KX FP362CX ...
Страница 164: ...10 2 OPERATION PANEL SECTION 164 KX FP362CX ...
Страница 165: ...10 3 BACK COVER SECTION 165 KX FP362CX ...
Страница 166: ...166 KX FP362CX ...
Страница 167: ...10 4 UPPER CABINET SECTION 167 KX FP362CX ...
Страница 168: ...10 5 LOWER CABINET P C BOARD SECTION CROSS REFERENCE MOTOR SECTION P 169 168 KX FP362CX ...
Страница 169: ...10 6 MOTOR SECTION 10 7 ACTUAL SIZE OF SCREWS 169 KX FP362CX ...
Страница 170: ...11 ACCESSORIES AND PACKING MATERIALS 170 KX FP362CX ...