9.2.5. DIGITAL SPEAKERPHONE
The digital speakerphone has different features from the analog speakerphone.
The analog speakerphone switches between Tx or Rx. Either Tx or Rx is able to pass through a telephone line or speaker,
depending on the Tx and Rx signal (voice) level. The higher-level signal (either TX or RX) can pass through the route.
Therefore, you never hear the other party´s voice while you are talking. However, the digital speakerphone allows you to hear
the other party´s voice while you are talking. So both Tx and Rx are active at the same time. There is also a defference in the
troubleshooting procedures between the two types.
At the start of communication, during the initial 2~3 correspondences, the digital speakerphone performs half-duplex operation,
alternating between transmission (Tx) and reception (Rx). Then duplex communication becomes available.
Learning occurs during the initial 2~3 correspondences in order to set the appropriate parameters for duplex communication.
You cannot check the digital speaker phone by the signal route test mentioned in the Analog Board Section because the level
is always changing as stated above.
Therefore, there is a service function for this troubleshooting. In this service mode, you can set the mute to either Tx or Rx. Then
you can check the signal route of the speaker phone Tx or the speaker phone Rx without any disturbances.
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KX-FT907BX-B / KX-FT907BX-W
Summary of Contents for KX-FT907BX-B
Page 25: ...6 DISASSEMBLY INSTRUCTIONS 6 1 HOW TO REMOVE PAPER STACKER 25 KX FT907BX B KX FT907BX W ...
Page 26: ...6 2 HOW TO REMOVE THE OPERATION PANEL BLOCK 26 KX FT907BX B KX FT907BX W ...
Page 27: ...6 3 HOW TO REMOVE THE OPERATION BOARD AND LCD 27 KX FT907BX B KX FT907BX W ...
Page 28: ...6 4 HOW TO REMOVE THE IMAGE SENSOR 28 KX FT907BX B KX FT907BX W ...
Page 29: ...6 5 HOW TO REMOVE THE THERMAL HEAD AND CUTTER UNIT 29 KX FT907BX B KX FT907BX W ...
Page 30: ...6 6 HOW TO REMOVE THE DOCUMENT TRAY 30 KX FT907BX B KX FT907BX W ...
Page 31: ...6 7 HOW TO REMOVE THE BOTTOM FRAME 31 KX FT907BX B KX FT907BX W ...
Page 32: ...6 8 HOW TO REMOVE THE HANDSET CRADLE CABINET AND SPEAKER 32 KX FT907BX B KX FT907BX W ...
Page 34: ...6 10 HOW TO REMOVE THE ROLLERS 34 KX FT907BX B KX FT907BX W ...
Page 35: ...6 11 HOW TO REMOVE THE MOTOR BLOCK 35 KX FT907BX B KX FT907BX W ...
Page 37: ...37 KX FT907BX B KX FT907BX W ...
Page 38: ...6 12 INSTALLATION POSITION OF THE LEAD WIRES 38 KX FT907BX B KX FT907BX W ...
Page 39: ...6 13 INSTALLATION OF THERMAL HEAD 39 KX FT907BX B KX FT907BX W ...
Page 51: ...7 4 6 SERVICE MODE SETTINGS Example of a printed out list 51 KX FT907BX B KX FT907BX W ...
Page 57: ...7 5 4 4 SKEW CROSS REFERENCE DISASSEMBLY INSTRUCTIONS P 25 57 KX FT907BX B KX FT907BX W ...
Page 63: ...7 5 5 1 2 SOMETIMES THERE IS A TRANSMIT PROBLEM 63 KX FT907BX B KX FT907BX W ...
Page 65: ...7 5 5 1 4 THE UNIT CAN COPY BUT CANNOT TRANSMIT RECEIVE 65 KX FT907BX B KX FT907BX W ...
Page 72: ...Countermeasure 72 KX FT907BX B KX FT907BX W ...
Page 73: ...73 KX FT907BX B KX FT907BX W ...
Page 74: ...74 KX FT907BX B KX FT907BX W ...
Page 75: ...75 KX FT907BX B KX FT907BX W ...
Page 76: ...76 KX FT907BX B KX FT907BX W ...
Page 77: ...77 KX FT907BX B KX FT907BX W ...
Page 78: ...78 KX FT907BX B KX FT907BX W ...
Page 79: ...79 KX FT907BX B KX FT907BX W ...
Page 84: ...84 KX FT907BX B KX FT907BX W ...
Page 87: ...87 KX FT907BX B KX FT907BX W ...
Page 90: ...7 5 8 3 NG EXAMPLE 90 KX FT907BX B KX FT907BX W ...
Page 92: ...92 KX FT907BX B KX FT907BX W ...
Page 94: ...Note Inside the digital board Inside the operation board 94 KX FT907BX B KX FT907BX W ...
Page 95: ...7 5 9 2 DEFECTIVE ITS INTEGRATED TELEPHONE SYSTEM SECTION 95 KX FT907BX B KX FT907BX W ...
Page 97: ...2 Troubleshooting Flow Chart 97 KX FT907BX B KX FT907BX W ...
Page 101: ...CROSS REFERENCE TEST FUNCTIONS P 45 101 KX FT907BX B KX FT907BX W ...
Page 103: ...8 CIRCUIT OPERATIONS 8 1 CONNECTION DIAGRAM 103 KX FT907BX B KX FT907BX W ...
Page 105: ...8 2 1 GENERAL BLOCK DIAGRAM 105 KX FT907BX B KX FT907BX W ...
Page 114: ...8 4 2 BLOCK DIAGRAM 114 KX FT907BX B KX FT907BX W ...
Page 116: ...116 KX FT907BX B KX FT907BX W ...
Page 122: ...8 4 6 3 4 COPYING CROSS REFERENCE SENSOR SECTION P 100 122 KX FT907BX B KX FT907BX W ...
Page 138: ...8 10 2 CIRCUIT DIAGRAM 138 KX FT907BX B KX FT907BX W ...
Page 148: ...Refer to ANALOG BOARD SECTION P 93 148 KX FT907BX B KX FT907BX W ...
Page 149: ...9 3 TEST CHART 9 3 1 ITU T No 1 TEST CHART 149 KX FT907BX B KX FT907BX W ...
Page 150: ...9 3 2 ITU T No 2 TEST CHART 150 KX FT907BX B KX FT907BX W ...
Page 151: ...10 FIXTURES AND TOOLS 151 KX FT907BX B KX FT907BX W ...
Page 152: ...11 CABINET MECHANICAL 11 1 OPERATION PANEL SECTION 152 KX FT907BX B KX FT907BX W ...
Page 153: ...11 2 UPPER CABINET SECTION 153 KX FT907BX B KX FT907BX W ...
Page 154: ...11 3 LOWER CABINET CROSS REFERENCE MOTOR SECTION P 155 154 KX FT907BX B KX FT907BX W ...
Page 155: ...11 4 MOTOR SECTION 155 KX FT907BX B KX FT907BX W ...
Page 156: ...11 5 ACTUAL SIZE OF SCREWS 156 KX FT907BX B KX FT907BX W ...
Page 157: ...12 ACCESSORIES AND PACKING MATERIALS 157 KX FT907BX B KX FT907BX W ...
Page 173: ...16 MEMO 173 KX FT907BX B KX FT907BX W ...
Page 180: ...180 KX FT907BX B KX FT907BX W Y M KXFT907BXB KXFT907BXW ...