21
KX-FP701LA
6.3.7.
RTC Backup Circuit
1.
Function
This unit has a lithium battery (BAT401) which works for Real Time Clock IC (RTC: inside IC1).
The RTC continues to work, backed up by a lithium battery even when the power switch is OFF.
The user parameters for autodial numbers, the system setup data and others are in the FLASH MEMORY (IC6).
2.
RTC Inside (IC1) Backup Circuit Operation
When the power switch is turned ON, power is supplied through Q7 to the RTC (inside IC1). At this time, the voltage at pin 14
of the IC1 is +2.5V. When the power switch is turned OFF, the BAT401 supplies power to RTC through D407 and Q505. The
voltage at pin 14 of IC1 is about +2.2V. When the power switch is OFF and the voltage of +3.3V decreases, pin 14 of RTC
(IC1) becomes roughly the same voltage as the battery voltage. RTC goes into the backup mode, in which the power con-
sumption is lower.
Summary of Contents for KX-FP701LA
Page 9: ...9 KX FP701LA 4 General Introduction 4 1 Error Message 4 1 1 Display 4 1 2 Report ...
Page 11: ...11 KX FP701LA 6 Technical Descriptions 6 1 Connection Diagram ...
Page 13: ...13 KX FP701LA 6 2 1 General Block Diagram ...
Page 15: ...15 KX FP701LA 6 3 2 Memory Map ...
Page 24: ...24 KX FP701LA 6 4 2 Block Diagram ...
Page 26: ...26 KX FP701LA ...
Page 68: ...68 KX FP701LA 11 2 2 Service Mode Settings Note The above values are the default values ...
Page 75: ...75 KX FP701LA Countermeasure ...
Page 76: ...76 KX FP701LA REFERENCE 10Test Mode P 60 ...
Page 77: ...77 KX FP701LA REFERENCE 10Test Mode P 60 ...
Page 78: ...78 KX FP701LA REFERENCE 10Test Mode P 60 ...
Page 79: ...79 KX FP701LA REFERENCE 10Test Mode P 60 ...
Page 80: ...80 KX FP701LA ...
Page 81: ...81 KX FP701LA ...
Page 82: ...82 KX FP701LA REFERENCE 10Test Mode P 60 ...
Page 86: ...86 KX FP701LA ...
Page 111: ...111 KX FP701LA ...
Page 118: ...118 KX FP701LA I O and Pin No Diagram ...
Page 120: ...120 KX FP701LA Other NG example while the power is ON and the LCD displays the following ...
Page 121: ...121 KX FP701LA 12 5 5 2 NG Example ...
Page 125: ...125 KX FP701LA 12 5 7 2 Troubleshooting Flow Chart ...
Page 129: ...129 KX FP701LA 12 5 9 5 Check the HOOK Switch SW101 ...
Page 131: ...131 KX FP701LA 12 5 11 Thermal Head Section Note Refer to 6 4 3 Thermal Head P 25 ...
Page 132: ...132 KX FP701LA 13 Service Fixture Tools ...
Page 136: ...136 KX FP701LA 14 2 2 HOW TO REMOVE THE OPERATION PANEL BLOCK ...
Page 137: ...137 KX FP701LA 14 2 3 HOW TO REMOVE THE OPERATION BOARD AND LCD ...
Page 138: ...138 KX FP701LA 14 2 4 HOW TO REMOVE THE SEPARATION HOLDER AND EXIT ROLLER ...
Page 139: ...139 KX FP701LA 14 2 5 HOW TO REMOVE THE IMAGE SENSOR CIS ...
Page 140: ...140 KX FP701LA 14 2 6 HOW TO REMOVE THE THERMAL HEAD ...
Page 141: ...141 KX FP701LA 14 2 7 HOW TO REMOVE THE PLATEN ROLLER AND BACK COVER ...
Page 142: ...142 KX FP701LA 14 2 8 HOW TO REMOVE THE PICKUP ROLLER ...
Page 143: ...143 KX FP701LA 14 2 9 HOW TO REMOVE THE CASSETTE LEVER ...
Page 144: ...144 KX FP701LA 14 2 10 HOW TO REMOVE THE BOTTOM FRAME ...
Page 145: ...145 KX FP701LA 14 2 11 HOW TO REMOVE THE DIGITAL ANALOG SENSOR BOARDS ...
Page 146: ...146 KX FP701LA 14 2 12 HOW TO REMOVE THE POWER SUPPLY BOARD AND AC CORD ...
Page 147: ...147 KX FP701LA 14 2 13 HOW TO REMOVE THE MOTOR BLOCK AND SEPARATION ROLLER ...
Page 148: ...148 KX FP701LA 14 2 14 HOW TO REMOVE THE GEARS OF MOTOR BLOCK ...
Page 149: ...149 KX FP701LA 14 2 15 INSTALLATION POSITION OF THE LEAD WIRES ...
Page 163: ...163 KX FP701LA 16 1 4 Power Supply Board 16 1 5 Interface Board ...
Page 166: ...166 KX FP701LA 16 3 Test Chart 16 3 1 ITU T No 1 Test chart ...
Page 167: ...167 KX FP701LA 16 3 2 ITU T No 2 Test Chart ...
Page 168: ...168 KX FP701LA 16 3 3 Test Chart ...
Page 169: ...169 KX FP701LA MEMO ...
Page 180: ...180 KX FP701LA MEMO ...
Page 188: ...188 KX FP701LA MEMO ...
Page 194: ...194 KX FP701LA 20 1 2 Operation Panel Section ...
Page 195: ...195 KX FP701LA 20 1 3 Back Cover Section ...
Page 196: ...196 KX FP701LA ...
Page 197: ...197 KX FP701LA 20 1 4 Upper Cabinet Section ...
Page 198: ...198 KX FP701LA 20 1 5 Lower Cabinet Section ...
Page 199: ...199 KX FP701LA 20 1 6 Gear Block Section ...
Page 200: ...200 KX FP701LA 20 1 7 Screws ...
Page 201: ...201 KX FP701LA 20 1 8 Accessories and Packing Materials ...