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.
150
KX-FP362BX
Содержание KX-FP362BX
Страница 21: ...4 1 2 COMPONENT LOCATIONS 21 KX FP362BX ...
Страница 32: ...5 2 DISASSEMBLY PROCEDURE 5 2 1 HOW TO REMOVE THE PAPER TRAY AND RECORDING PAPER SUPPORT 32 KX FP362BX ...
Страница 33: ...5 2 2 HOW TO REMOVE THE OPERATION PANEL BLOCK 33 KX FP362BX ...
Страница 34: ...5 2 3 HOW TO REMOVE THE OPERATION BOARD AND LCD 34 KX FP362BX ...
Страница 35: ...5 2 4 HOW TO REMOVE THE IMAGE SENSOR CIS 35 KX FP362BX ...
Страница 36: ...5 2 5 HOW TO REMOVE THE THERMAL HEAD 36 KX FP362BX ...
Страница 37: ...5 2 6 HOW TO REMOVE THE PLATEN ROLLER AND BACK COVER 37 KX FP362BX ...
Страница 38: ...5 2 7 HOW TO REMOVE THE PICKUP ROLLER 38 KX FP362BX ...
Страница 39: ...5 2 8 HOW TO REMOVE THE CASSETTE LEVER 39 KX FP362BX ...
Страница 40: ...5 2 9 HOW TO REMOVE THE BOTTOM FRAME 40 KX FP362BX ...
Страница 41: ...5 2 10 HOW TO REMOVE THE DIGITAL ANALOG POWER SUPPLY SENSOR BOARDS AND AC INLET 41 KX FP362BX ...
Страница 42: ...5 2 11 HOW TO REMOVE THE MOTOR BLOCK AND SEPARATION ROLLER 42 KX FP362BX ...
Страница 43: ...5 2 12 HOW TO REMOVE THE GEARS OF MOTOR BLOCK 43 KX FP362BX ...
Страница 44: ...5 3 INSTALLATION POSITION OF THE LEAD WIRES 44 KX FP362BX ...
Страница 56: ...6 5 THE EXAMPLE OF THE PRINTED LIST 6 5 1 USER MODE Note The above values are the default values 56 KX FP362BX ...
Страница 57: ...6 5 2 SREVICE MODE SETTINGS Note The above values are the default values 57 KX FP362BX ...
Страница 71: ...71 KX FP362BX ...
Страница 85: ...85 KX FP362BX ...
Страница 86: ...CROSS REFERENCE TEST FUNCTIONS P 50 86 KX FP362BX ...
Страница 87: ...CROSS REFERENCE TEST FUNCTIONS P 50 87 KX FP362BX ...
Страница 88: ...CROSS REFERENCE TEST FUNCTIONS P 50 88 KX FP362BX ...
Страница 89: ...CROSS REFERENCE TEST FUNCTIONS P 50 89 KX FP362BX ...
Страница 90: ...90 KX FP362BX ...
Страница 91: ...91 KX FP362BX ...
Страница 92: ...CROSS REFERENCE TEST FUNCTIONS P 50 92 KX FP362BX ...
Страница 96: ...96 KX FP362BX ...
Страница 100: ...I O and Pin No Diagram 100 KX FP362BX ...
Страница 101: ...6 6 7 1 CHECK THE STATUS OF THE DIGITAL BOARD CROSS REFERENCE NG Wave pattern Refer to NG EXAMPLE P 98 101 KX FP362BX ...
Страница 104: ...6 6 7 3 NG EXAMPLE 104 KX FP362BX ...
Страница 108: ...Note Refer to CHECK SHEET P 105 and TEST FUNCTIONS P 50 108 KX FP362BX ...
Страница 110: ...6 6 10 2 TROUBLESHOOTING FLOW CHART 110 KX FP362BX ...
Страница 116: ...6 6 14 THERMAL HEAD SECTION Refer to THERMAL HEAD P 131 116 KX FP362BX ...
Страница 117: ...7 CIRCUIT OPERATIONS 7 1 CONNECTION DIAGRAM 117 KX FP362BX ...
Страница 119: ...7 2 1 GENERAL BLOCK DIAGRAM 119 KX FP362BX ...
Страница 121: ...7 3 2 MEMORY MAP 121 KX FP362BX ...
Страница 130: ...7 4 2 BLOCK DIAGRAM 130 KX FP362BX ...
Страница 133: ...TIMING CHART i Print Duty 50 or less ii Print Duty more than 50 133 KX FP362BX ...
Страница 145: ...b Redundancy Compression Process Coding Mode This unit uses one dimensional MH format 145 KX FP362BX ...
Страница 152: ...152 KX FP362BX ...
Страница 159: ...8 REFERENCE MATERIAL DATA 8 1 TERMINAL GUIDE OF THE ICs TRANSISTORS AND DIODES 159 KX FP362BX ...
Страница 162: ...8 3 TEST CHART 8 3 1 ITU T No 1 TEST CHART 162 KX FP362BX ...
Страница 163: ...8 3 2 ITU T No 2 TEST CHART 163 KX FP362BX ...
Страница 164: ...9 FIXTURES AND TOOLS 164 KX FP362BX ...
Страница 165: ...10 CABINET MECHANICAL AND ELECTRICAL PARTS LOCATION 10 1 GENERAL SECTION 165 KX FP362BX ...
Страница 166: ...10 2 OPERATION PANEL SECTION 166 KX FP362BX ...
Страница 167: ...10 3 BACK COVER SECTION 167 KX FP362BX ...
Страница 168: ...168 KX FP362BX ...
Страница 169: ...10 4 UPPER CABINET SECTION 169 KX FP362BX ...
Страница 170: ...10 5 LOWER CABINET P C BOARD SECTION CROSS REFERENCE MOTOR SECTION P 171 170 KX FP362BX ...
Страница 171: ...10 6 MOTOR SECTION 10 7 ACTUAL SIZE OF SCREWS 171 KX FP362BX ...
Страница 172: ...11 ACCESSORIES AND PACKING MATERIALS 172 KX FP362BX ...