Panasonic KX-FT25LA, Service Manual

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1 INTRODUCTION 3
1.1. SAFETY PRECAUTIONS 3
1.2. INSULATION RESISTANCE TEST 3
1.3. FOR SERVICE TECHNICIANS 3
1.4. BATTERY CAUTION 3
1.5. AC CAUTION 4
1.6. PERSONAL SAFETY PRECAUTIONS 5
1.7. FEATURES 6
1.8. SPECIFICATIONS 7
1.9. OPTIONAL ACCESSORIES 7
1.10. CCITT No. 1 TEST CHART 8
1.11. LOCATION OF CONTROLS 9
1.12. CONNECTIONS 11
1.13. INSTALLATION 12
1.14. MAINTENANCE ITEMS AND COMPONENT LOCATIONS
15
2 TROUBLESHOOTING GUIDE 19
2.1. TROUBLESHOOTING SUMMARY 19
2.2. USER RECOVERABLE ERRORS 20
2.3. TROUBLESHOOTING DETAILS 22
2.4. PROGRAMMING AND LISTS 79
2.5. TEST FUNCTIONS 86
3 ADJUSTMENTS 88
3.1. ADJUSTING THE FEED PRESSURE 88
4 DISASSEMBLY INSTRUCTIONS 89
5 HOW TO REPLACE THE FLAT PACKAGE IC 100
5.1. PREPARATION 100
5.2. FLAT PACKAGE IC REMOVAL PROCEDURE 100
5.3. FLAT PACKAGE IC INSTALLATION PROCEDURE 101
5.4. BRIDGE MODIFICATION PROCEDURE 101
6 CIRCUIT OPERATIONS 102
6.1. CONNECTION DIAGRAM 102
6.2. GENERAL BLOCK DIAGRAM 103
6.3. CONTROL SECTION 105
6.4. FACSIMILE SECTION 113
6.5. SENSORS AND SWITCHES 123
6.6. MODEM SECTION 126
6.7. Analog Unit Block Diagram 133
6.8. NCU SECTION 134
6.9. ITS (Integrated telephone System) and MONITOR
SECTION 136
6.10. ATAS (Automatic Telephone Answering System)
SECTION 136
6.11. OPERATION PANEL 138
6.12. POWER SUPPLY BOARD SECTION 140
7 FOR THE SCHEMATIC DIAGRAMS 142
8 PRINTED CIRCUIT BOARD 143
8.1. PRINTED CIRCUIT BOARD (DIGITAL BOARD):
COMPONENT VIEW 143
8.2. PRINTED CIRCUIT BOARD (DIGITAL BOARD): BOTTOM
VIEW 144
8.3. PRINTED CIRCUIT BOARD (ANALOG BOARD):
COMPONENT VIEW 145
8.4. PRINTED CIRCUIT BOARD (ANALOG BOARD):
BOTTOM VIEW 146
8.5. PRINTED CIRCUIT BOARD (SWITCHING POWER
SUPPLY) 147
8.6. PRINTED CIRCUIT BOARD (OPERATION BOARD) 148
9 SCHEMATIC DIAGRAM 149
9.1. SCHEMATIC DIAGRAM (DIGITAL CIRCUIT) 149
9.2. SCHEMATIC DIAGRAM (ANALOG CIRCUIT) 150
9.3. SCHEMATIC DIAGRAM (SWITCHING POWER SUPPLY)
151
9.4. SCHEMATIC DIAGRAM (OPERATION CIRCUIT) 152
10 TERMINAL GUIDE OF THE IC
·
S TRANSISTORS AND DIODES
153
11 FIXTURES AND TOOLS 154
12 CABINET, MECHANICAL AND ELECTRICAL PARTS
LOCATION 155
12.1. OPERATION PANEL SECTION 155
12.2. UPPER CABINET SECTION 156
12.3. LOWER CABINET/P.C.B. SECTION 157
12.4. MOTOR SECTION 158
12.5. ACTUAL SIZE OF SCREWS AND WASHER 159
13 ACCESSORIES AND PACKING MATERIALS 160
14 REPLACEMENT PARTS LIST 161
14.1. CABINET AND ELECTRICAL PARTS 161
14.2. DIGITAL BOARD PARTS 162
14.3. ANALOG BOARD PARTS 164
14.4. OPERATION BOARD PARTS 165
14.5. POWER SUPPLY BOARD PARTS 166
14.6. FIXTURES AND TOOLS 167
CONTENTS
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KX-FT25LA