8.3.4. RESET CIRCUIT (WATCH DOG TIMER)
The output signal (reset) from pin 4 of the voltage detect IC (IC13) is input to the ASIC (IC10) 114 pin.
1. During a momentary power interruption, a positive reset pulse of 50~70 msec is generated and the system is reset completely.
2. The watch dog timer, built-in the ASIC (IC10), is initialized by the CPU about every 1.5 ms.
When a watch dog error occurs, pin 115 of the ASIC (IC10) becomes low level.
The terminal of the ´WDERR´ signal is connected to the reset line, so the ´WDERR´ signal works as the reset signal.
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KX-FC971CX-S / KX-FGA521CX-S
Summary of Contents for KX-FC971CX-S
Page 29: ...6 2 BASE UNIT 6 2 1 HOW TO REMOVE THE PAPER STACKER 29 KX FC971CX S KX FGA521CX S ...
Page 30: ...6 2 2 HOW TO REMOVE THE OPERATION PANEL BLOCK 30 KX FC971CX S KX FGA521CX S ...
Page 33: ...6 2 5 HOW TO REMOVE THE IMAGE SENSOR CIS AND FEED ROLLER 33 KX FC971CX S KX FGA521CX S ...
Page 34: ...6 2 6 HOW TO REMOVE THE ANTENNA AND CUTTER UNIT 34 KX FC971CX S KX FGA521CX S ...
Page 35: ...6 2 7 HOW TO REMOVE THE LOCK LEVER AND THERMAL HEAD 35 KX FC971CX S KX FGA521CX S ...
Page 36: ...6 2 8 HOW TO REMOVE THE BOTTOM FRAME 36 KX FC971CX S KX FGA521CX S ...
Page 39: ...6 2 12 INSTALLATION POSITION OF THE LEAD WIRES 39 KX FC971CX S KX FGA521CX S ...
Page 41: ...41 KX FC971CX S KX FGA521CX S ...
Page 42: ...42 KX FC971CX S KX FGA521CX S ...
Page 43: ...6 3 2 HOW TO REMOVE THE CORDLESS HANDSET BOARD 43 KX FC971CX S KX FGA521CX S ...
Page 69: ...CROSS REFERENCE DISASSEMBLY INSTRUCTIONS P 27 69 KX FC971CX S KX FGA521CX S ...
Page 80: ...80 KX FC971CX S KX FGA521CX S ...
Page 81: ...CROSS REFERENCE TEST FUNCTIONS P 50 81 KX FC971CX S KX FGA521CX S ...
Page 82: ...CROSS REFERENCE TEST FUNCTIONS P 50 82 KX FC971CX S KX FGA521CX S ...
Page 83: ...CROSS REFERENCE TEST FUNCTIONS P 50 83 KX FC971CX S KX FGA521CX S ...
Page 84: ...CROSS REFERENCE TEST FUNCTIONS P 50 84 KX FC971CX S KX FGA521CX S ...
Page 85: ...85 KX FC971CX S KX FGA521CX S ...
Page 86: ...86 KX FC971CX S KX FGA521CX S ...
Page 87: ...CROSS REFERENCE TEST FUNCTIONS P 50 87 KX FC971CX S KX FGA521CX S ...
Page 91: ...91 KX FC971CX S KX FGA521CX S ...
Page 98: ...7 7 6 3 NG Example 98 KX FC971CX S KX FGA521CX S ...
Page 102: ...7 7 8 2 Troubleshooting Flow Chart 102 KX FC971CX S KX FGA521CX S ...
Page 107: ...7 7 12 THERMAL HEAD SECTION Refer to THERMAL HEAD P 138 107 KX FC971CX S KX FGA521CX S ...
Page 126: ...8 CIRCUIT OPERATIONS 8 1 CONNECTION DIAGRAM 126 KX FC971CX S KX FGA521CX S ...
Page 128: ...Supplies 5V 8V and 24V to the unit 128 KX FC971CX S KX FGA521CX S ...
Page 137: ...8 4 2 BLOCK DIAGRAM 137 KX FC971CX S KX FGA521CX S ...
Page 139: ...139 KX FC971CX S KX FGA521CX S ...
Page 146: ...8 4 6 3 2 SCANNING CROSS REFERENCE SENSOR SECTION P 105 146 KX FC971CX S KX FGA521CX S ...
Page 147: ...8 4 6 3 3 PRINTING Note See SENSORS AND SWITCHES P 149 147 KX FC971CX S KX FGA521CX S ...
Page 148: ...8 4 6 3 4 COPYING CROSS REFERENCE SENSOR SECTION P 105 148 KX FC971CX S KX FGA521CX S ...
Page 162: ...162 KX FC971CX S KX FGA521CX S ...
Page 181: ...9 3 TEST CHART 9 3 1 ITU T No 1 TEST CHART 181 KX FC971CX S KX FGA521CX S ...
Page 182: ...9 3 2 ITU T No 2 TEST CHART 182 KX FC971CX S KX FGA521CX S ...
Page 183: ...10 FIXTURES AND TOOLS 183 KX FC971CX S KX FGA521CX S ...
Page 185: ...11 2 UPPER CABINET SECTION 185 KX FC971CX S KX FGA521CX S ...
Page 186: ...11 3 LOWER CABINET SECTION 186 KX FC971CX S KX FGA521CX S ...
Page 187: ...11 4 MOTOR SECTION 187 KX FC971CX S KX FGA521CX S ...
Page 188: ...11 5 CORDLESS HANDSET SECTION 188 KX FC971CX S KX FGA521CX S ...
Page 189: ...11 6 CHARGER UNIT SECTION 189 KX FC971CX S KX FGA521CX S ...
Page 190: ...11 7 ACTUAL SIZE OF SCREWS 190 KX FC971CX S KX FGA521CX S ...
Page 191: ...12 ACCESSORIES AND PACKING MATERIALS 191 KX FC971CX S KX FGA521CX S ...
Page 192: ...13 ACCESSORIES AND PACKING MATERIALS 13 1 KX FGA521CX 192 KX FC971CX S KX FGA521CX S ...
Page 217: ...17 4 POWER SUPPLY BOARD IC101 KX FC971CX S POWER SUPPLY BOARD KX FC971CX S KX FGA521CX S 217 ...