41
KX-FT981LA-B / KX-FT987LA-B
6.8.
ITS (Integrated Telephone System) and Monitor Section
6.8.1.
General
The general ITS operation is performed by the modem IC5. The alarm tone, the key tone, the calling tone and the beep are output
from the ASIC IC1 (digital board).
6.8.2.
Telephone Monitor (KX-FT981 only)
1.
Function
This is the function when you are not holding the handset and can hear the caller’s voice from the line.
2.
Signal path
Refer to
Check Sheet for Signal Route
(P.114)
6.8.3.
Speakerphone Circuit (KX-FT987 only)
1.
Function
The circuit controls the automatic switching of the transmitted and received signals, to and from the telephone line, when the
unit is used in the hands-free mode.
2.
Circuit Operation
The speakerphone can only provide duplex.
3.
Signal path
Refer to
Check Sheet for Signal Route
(P.114)
6.8.4.
Handset Circuit
1.
Function
This circuit controls the conversation over the handset, i.e. the transmitted and received voices to and from the handset.
2.
Signal path
Refer to
Check Sheet for Signal Route
(P.114)
6.8.5.
Monitor Circuit for Each Signals
1.
Function
This circuit monitors various tones, such as
1
DTMF tone,
2
Alarm/Beep/Key tone/Bell
3
Dummy ring back tone.
2.
Signal path
Refer to
Check Sheet for Signal Route
(P.114)
6.9.
TAM Interface Section (KX-FT981 only)
1.
Function
When TAM is connected to this unit, the unit receives documents for FAX calls or the external TAM records a voice message
automatically.
2.
Circuit Operation
The TAM INTERFACE circuit consists of a CNG signal from the other party’s detection circuit, VOX detection circuit (to judge
sound/no-sound) and RLY101 (to separate EXT. TAM).
a.
CNG/VOX signal detection circuit
The CNG signal from the other party’s FAX is detected in MODEM IC5 (digital board).
b.
Remote receiving
This is the parallel connected DTMF signal for the TEL mode between a and b. When the other party is a FAX, the unit
changes to FAX receiving.
3.
Signal path
Refer to
Check Sheet for Signal Route
(P.114)
Содержание KX-FT981LA-B
Страница 11: ...11 KX FT981LA B KX FT987LA B 6 Technical Descriptions 6 1 Connection Diagram ...
Страница 13: ...13 KX FT981LA B KX FT987LA B 6 2 1 General Block Diagram ...
Страница 21: ...21 KX FT981LA B KX FT987LA B 6 4 2 Block Diagram ...
Страница 23: ...23 KX FT981LA B KX FT987LA B ...
Страница 63: ...63 KX FT981LA B KX FT987LA B 11 2 2 User Mode KX FT987 ...
Страница 71: ...71 KX FT981LA B KX FT987LA B Countermeasure ...
Страница 72: ...72 KX FT981LA B KX FT987LA B REFERENCE Test Mode P 54 ...
Страница 73: ...73 KX FT981LA B KX FT987LA B REFERENCE Test Mode P 54 ...
Страница 74: ...74 KX FT981LA B KX FT987LA B REFERENCE Test Mode P 54 ...
Страница 75: ...75 KX FT981LA B KX FT987LA B REFERENCE Test Mode P 54 ...
Страница 76: ...76 KX FT981LA B KX FT987LA B ...
Страница 77: ...77 KX FT981LA B KX FT987LA B ...
Страница 78: ...78 KX FT981LA B KX FT987LA B REFERENCE Test Mode P 54 ...
Страница 82: ...82 KX FT981LA B KX FT987LA B ...
Страница 108: ...108 KX FT981LA B KX FT987LA B NG Wave pattern Note Refer to NG Example P 113 ...
Страница 110: ...110 KX FT981LA B KX FT987LA B I O and Pin No Diagram ...
Страница 113: ...113 KX FT981LA B KX FT987LA B 12 5 6 2 NG Example ...
Страница 115: ...115 KX FT981LA B KX FT987LA B ...
Страница 120: ...120 KX FT981LA B KX FT987LA B 12 5 9 2 Troubleshooting Flow Chart ...
Страница 126: ...126 KX FT981LA B KX FT987LA B 12 5 13 Thermal Head Section Refer to Thermal Head P 22 ...
Страница 127: ...127 KX FT981LA B KX FT987LA B 13 Service Fixture Tools ...
Страница 129: ...129 KX FT981LA B KX FT987LA B 14 1 Upper Cabinet Section 14 1 1 How to Remove the Image Sensor CIS and Feed Roller ...
Страница 130: ...130 KX FT981LA B KX FT987LA B 14 1 2 How to Remove the Cutter Unit KX FT987 only ...
Страница 131: ...131 KX FT981LA B KX FT987LA B 14 1 3 How to Remove the Lock Lever and Thermal Head ...
Страница 132: ...132 KX FT981LA B KX FT987LA B 14 2 Lower Cabinet Section 14 2 1 How to Remove the Bottom Frame ...
Страница 133: ...133 KX FT981LA B KX FT987LA B 14 2 2 How to Remove the P C Boards and Power Cord ...
Страница 135: ...135 KX FT981LA B KX FT987LA B 14 3 Operation Panel Section 14 3 1 How to Remove the Operation Panel Block ...
Страница 136: ...136 KX FT981LA B KX FT987LA B 14 3 2 How to Remove the Operation Board LCD and Platen Roller ...
Страница 137: ...137 KX FT981LA B KX FT987LA B 14 3 3 How to Remove the Separation Rubber Flap ...
Страница 138: ...138 KX FT981LA B KX FT987LA B 14 4 Installation Position of the Lead Wires ...
Страница 139: ...139 KX FT981LA B KX FT987LA B ...
Страница 147: ...147 KX FT981LA B KX FT987LA B 15 2 3 4 Copying REFERENCE Sensor Section P 123 ...
Страница 152: ...152 KX FT981LA B KX FT987LA B 16 1 4 Power Supply Board ...
Страница 154: ...154 KX FT981LA B KX FT987LA B 16 3 Test Chart 16 3 1 ITU T No 1 Test Chart ...
Страница 155: ...155 KX FT981LA B KX FT987LA B 16 3 2 ITU T No 2 Test Chart ...
Страница 168: ...168 KX FT981LA B KX FT987LA B MEMO ...
Страница 177: ...177 KX FT981LA B KX FT987LA B 20 Exploded View and Replacement Parts List 20 1 Cabinet and Mechanical Parts Location ...
Страница 178: ...178 KX FT981LA B KX FT987LA B 20 1 1 Operation Panel Section KX FT981 ...
Страница 179: ...179 KX FT981LA B KX FT987LA B 20 1 2 Operation Panel Section KX FT987 ...
Страница 180: ...180 KX FT981LA B KX FT987LA B 20 1 3 Upper Cabinet Section ...
Страница 181: ...181 KX FT981LA B KX FT987LA B 20 1 4 Lower Cabinet Section ...
Страница 182: ...182 KX FT981LA B KX FT987LA B 20 1 5 Gear Block Section ...
Страница 183: ...183 KX FT981LA B KX FT987LA B 20 1 6 Screws ...
Страница 184: ...184 KX FT981LA B KX FT987LA B 20 1 7 Accessories and Packing Materials ...
Страница 192: ...192 KX FT981LA B KX FT987LA B K N KXFT981LAB KXFT987LAB ...