KX-TG2401B, KX-TG2401S

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Service manual used with:

KX-TG2401B, KX-TG2401S


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1 LOCATION OF CONTROLS 4
1.1. Base Unit 4
1.2. Handset 5
2 SETTINGS 6
2.1. Connections 6
2.2. Adding Another Phone 7
2.3. STANDARD BATTERY LIFE 8
2.4. Selecting the Dialing Mode 10
3 OPERATION 11
3.1. Making Calls 11
3.2. Answering Calls 12
3.3. Flash Button 13
3.4. Speed Dialer 13
3.5. One-Touch Dialer 14
4 DISASSEMBLY INSTRUCTIONS 15
5 ASSEMBLY INSTRUCTIONS 17
5.1. Replace the RF unit 17
6 TROUBLESHOOTING GUIDE 18
6.1. Check EEPROM 19
6.2. Check Power 19
6.3. Check Battery Charge 20
6.4. Check Link 21
6.5. Check the RF Unit 22
6.6. Check Handset Transmission 25
6.7. Check Handset Reception 25
7 TEST MODE AND ADJUSTMENT 26
7.1. Test Mode Flow Chart for Base Unit 26
7.2. Test Mode Flow Chart for Handset 27
7.3. Adjustment Battery Low Detector Voltage 28
7.4. Base Unit Reference Drawing 29
7.5. Handset Reference Drawing 30
7.6. Frequency Table 31
8 DESCRIPTION 32
8.1. Frequency 32
8.2. Time Division Duplex (TDD) operation 32
8.3. Spread Spectrum 33
8.4. Signal Flowchart in the Whole System 34
8.5. EXPLANATION OF DSP DATA COMMUNICATION 35
9 BLOCK DIAGRAM (Base Unit) 36
10 CIRCUIT OPERATION (Base Unit) 37
10.1. Power Supply Circuit 37
10.2. Reset Circuit 38
10.3. Charge Circuit 39
10.4. Telephone Line Interface 40
10.5. DSP (Digital Speech/Signal Processing) Circuit 41
10.6. Signal Route 42
11 BLOCK DIAGRAM (Handset) 43
12 CIRCUIT OPERATION (Handset) 44
12.1. Construction 44
12.2. Power Supply Circuit 44
12.3. Reset Circuit 45
12.4. Charge Circuit 45
12.5. Ringer Circuit 45
12.6. Sending Signal 45
12.7. Reception Signal Circuit 45
13 DSP DATA (Base Unit) 46
13.1. IC501 46
14 DSP DATA (Handset) 47
14.1. IC201 47
15 EXPLANATION OF IC TERMINALS (RF Unit) 48
15.1. IC101 48
16 HOW TO REPLACE FLAT PACKAGE IC 49
16.1. Preparation 49
16.2. Procedure 49
16.3. Modification Procedure of Bridge 49
17 CABINET AND ELECTRICAL PARTS (Base Unit) 50



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