Panasonic KX-TG1843ALS, Service Manual

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1 ABOUT LEAD FREE SOLDER (PbF: Pb free) 4
1.1. Suggested PbF Solder 4
1.2. How to recognize that Pb Free solder is used 5
2 FOR SERVICE TECHNICIANS 5
3 CAUTION 5
4 OPERATING INSTRUCTIONS 6
4.1. Battery 6
4.2. Location ofControls 8
4.3. Connections 9
4.4. Guide to Settings 10
4.5. For Service Hint 11
5 DISASSEMBLY INSTRUCTIONS 12
5.1. Base Unit 12
5.2. Handset 13
5.3. Charger Unit 14
6 HOW TO REPLACE THE HANDSET LCD 15
7 TROUBLESHOOTING FLOWCHART 16
7.1. Check Power 17
7.2. Check Battery Charge 18
7.3. Check Link 19
7.4. Check Handset Transmission 23
7.5. Check Handset Reception 23
7.6. Check Caller ID 23
7.7. Check Base Speakerphone Transmission 23
7.8. Check Base Speakerphone Reception 23
7.9. Bell Reception 24
7.10. Check TAM Operation 24
8 TROUBLESHOOTING BY SYMPTOM (BASE UNIT AND
CHARGER UNIT) 25
8.1. Check Point (Base Unit) 25
8.2. The Setting Method ofJIG (Base Unit) 30
8.3. Adjustment Standard (Base Unit) 32
8.4. Check Point (Charger Unit) 33
8.5. Adjustment Standard (Charger Unit) 33
9 TROUBLESHOOTING BY SYMPTOM (HANDSET) 34
9.1. Check Point (Handset) 34
9.2. Troubleshooting for Speakerphone (Handset) 37
9.3. The Setting Method ofJIG (Handset) 38
9.4. Adjustment Standard (Handset) 40
10 THINGS TO DO AFTER REPLACING IC 41
10.1. Base Unit 41
10.2. Handset 41
11 RFSPECIFICATION 42
11.1. Base Unit 42
11.2. Handset 42
12 HOW TO CHECK THE SPEAKER OR RECEIVER 43
13 FREQUENCY TABLE (MHz) 43
14 BLOCK DIAGRAM (BASE UNIT) 44
15 CIRCUIT OPERATION (BASE UNIT) 45
15.1. Outline 45
15.2. Power Supply Circuit 46
15.3. Telephone Line Interface 47
15.4. Transmitter/Receiver 47
16 BLOCK DIAGRAM (HANDSET) 48
17 CIRCUIT OPERATION (HANDSET) 49
17.1. Outline 49
17.2. Power Supply Circuit/Reset Circuit 49
17.3. Charge Circuit 49
17.4. Battery Low/Power Down Detector 49
17.5. Speakerphone 49
18 CIRCUIT OPERATION (CHARGER UNIT) 50
18.1. Power Supply Circuit 50
19 SIGNAL ROUTE 51
20 CPU DATA (BASE UNIT) 53
20.1. IC4 (BBIC) 53
21 CPU DATA (HANDSET) 56
21.1. IC1 (BBIC) 56
22 ENGINEERING MODE 58
22.1. Base Unit 58
22.2. Handset 61
23 HOW TO REPLACE THE FLAT PACKAGE IC 63
23.1. PREPARATION 63
23.2. FLAT PACKAGE IC REMOVAL PROCEDURE 63
23.3. FLAT PACKAGE IC INSTALLATION PROCEDURE 64
Note:
Because CONTENTS 4 is the extract from the Operating Instructions of this model, it is subject to change without notice. You can
download and refer to the original Operating Instructions on TSN Server for further information.
CONTENTS
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KX-TG1843ALS / KX-TGA122AZS / KX-TGA121AZS