Panasonic KX-FT21BX Service Manual page 29

CIRCUIT OPERATIONS
Connection Diagram ....................................................................................................................... 109
General Block Diagram .......................................................................................................... 110~111
Control Section ....................................................................................................................... 112~120
Facsimile Section ................................................................................................................... 120~132
MODEM Section .................................................................................................................... 133~140
NCU Section .......................................................................................................................... 141~142
ITS and Monitor Section ................................................................................................................. 143
EXT. TEL ................................................................................................................................. 144~145
Operation Panel ...................................................................................................................... 146~147
Power Supply Switching Board Section ................................................................................. 148~151
PRINTED CIRCUIT BOARD (DIGITAL BOARD) ............................................................................. 153~156
SCHEMATIC DIAGRAM (DIGITAL CIRCUIT) ......................................................................................... 157
SCHEMATIC DIAGRAM (ANALOG CIRCUIT) ........................................................................................ 158
PRINTED CIRCUIT BOARD (ANALOG BOARD) ............................................................................ 159~160
PRINTED CIRCUIT BOARD (SWITCHING POWER SUPPLY) .............................................................. 161
SCHEMATIC DIAGRAM (SWITCHING POWER SUPPLY) .................................................................... 162
PRINTED CIRCUIT BOARD (OPERATION BOARD) ............................................................................. 163
SCHEMATIC DIAGRAM (OPERATION CIRCUIT) .................................................................................. 164
TERMINAL GUIDE OF THE IC'S TRANSISTORS AND DIODES ........................................................... 165
FIXTURES AND TOOLS ........................................................................................................................ 166
CABINET, MECHANICAL AND ELECTRICAL PARTS LOCATION ................................................ 167~171
ACCESSORIES AND PACKING MATERIALS ........................................................................................ 172
REPLACEMENT PARTS LIST ........................................................................................................ 173~179
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KX-FT21LA