Read Panasonic KX-FT57E Service Manual online
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118
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KX-FT57E
CIRCUIT OPERATIONS
Page
1. Connection Diagram ........................................................................ 119
2. General Block Diagram ........................................................... 120, 121
3. Control Section ........................................................................ 122~127
3-1. Block Diagram ................................................................... 123
3-2. Reset Circuit ..................................................................... 124
3-3. SRAM and RTC Back Up Circuit ...................................... 125
3-4. Supervision circuit for the Thermal Head Temperature .... 126
3-5. LED Array ......................................................................... 127
4. Facsimile Section .................................................................... 127~135
4-1. Image Data Flow during Facsimile Operation ........... 127, 128
4-2. Thermal Head ........................................................... 129, 130
4-3. Read Section .................................................................... 131
4-4. Stepping Motor Drive Circuit ............................................. 132
4-5. Sensors and Switches .............................................. 133~135
5. Digital Speaker Phone Circuit ......................................................... 136
6. MODEM Section ...................................................................... 137~143
6-1. Function .................................................................... 137~142
6-2. MODEM Circuit Operation ................................................ 143
7. Explanation of Analog Section Block Diagram ........................ 144, 145
8. NCU Section ............................................................................ 146~149
9. Analog Gate Array ................................................................... 150, 151
10. Operation Panel ............................................................................ 152
11. LCD COG Type ............................................................................. 153
12. Power Supply Board Switching Section ................................ 154~156
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