6.3.3. ROM (IC2)
This 128 KB ROM (OTPROM or MASKROM) has 32 KB of common area and bank area (BK4~BK15).
The capacity of each bank is 8 KB.
The addresses of the common area are from 0000H to 7FFFH, and addresses 8000H to 9FFFH are for the bank area.
6.3.4. RAM (IC3)
This 32 KB RAM has 8 KB of common area and bank area (BK0, BK1).
The capacity of each bank is 12 KB.
The addresses of the common area are from D000H to EFFFH, and addresses A000H to CFFFH are for the bank area.
6.3.5. Reset Circuit
The output from pin 1 of the Reset IC (IC4) resets the gate array (IC1).
1. During a power surge, a positive reset pulse of 175 msec or more is generated and the system is reset completely.
This is done to prevent partial resetting and system runaway during a power fluctuation.
2. When pin 1 of IC4 becomes low, it will prohibit the RAM (IC3) from changing data.
The RAM (IC3) will go into the backup mode, when it is backed up by a lithium battery.
3. The watch dog timer, built-in the gate array (IC1), is initialized about every 1.5 ms.
When a watch dog error occurs, pin 18 of the gate array (IC1) becomes low.
The terminal of the WDERR signal is connected to the reset line so the WDERR signal works as the reset signal.
105
KX-FT21RS
Содержание KX-FT21RS
Страница 8: ...1 10 CCITT No 1 TEST CHART 8 KX FT21RS ...
Страница 9: ...1 11 LOCATION OF CONTROLS 1 11 1 OVERVIEW 1 11 2 CONTROL PANEL 9 KX FT21RS ...
Страница 15: ...1 14 2 1 MAINTENANCE LIST 1 14 2 2 MAINTENANCE CYCLE 15 KX FT21RS ...
Страница 22: ...2 3 3 Simple Check List 22 KX FT21RS ...
Страница 23: ...2 3 4 TROUBLESHOOTING ITEMS TABLE 23 KX FT21RS ...
Страница 24: ...2 3 4 1 ADF Auto Document Feed Section 1 No document feed 24 KX FT21RS ...
Страница 25: ...2 Paper JAM 25 KX FT21RS ...
Страница 27: ...4 Skew 27 KX FT21RS ...
Страница 28: ...5 Image is distorted When printing 28 KX FT21RS ...
Страница 29: ...6 Black or white vertical lines appear 7 Skewed receiving image 29 KX FT21RS ...
Страница 31: ...31 KX FT21RS ...
Страница 33: ...2 3 4 2 1 Defective facsimile section 1 Transmit problem 33 KX FT21RS ...
Страница 34: ...2 Sometimes there is a transmit problem 34 KX FT21RS ...
Страница 36: ...4 The unit can copy but cannot transmit receive 36 KX FT21RS ...
Страница 40: ...7 How to output the Journal Report 40 KX FT21RS ...
Страница 42: ...Countermeasure 42 KX FT21RS ...
Страница 43: ...43 KX FT21RS ...
Страница 44: ...44 KX FT21RS ...
Страница 45: ...45 KX FT21RS ...
Страница 46: ...46 KX FT21RS ...
Страница 47: ...47 KX FT21RS ...
Страница 48: ...48 KX FT21RS ...
Страница 49: ...49 KX FT21RS ...
Страница 51: ...1 Entering the remote programming mode and changing service codes 51 KX FT21RS ...
Страница 57: ...Normal Wave Patterns 57 KX FT21RS ...
Страница 60: ...60 KX FT21RS ...
Страница 61: ...NG Example 61 KX FT21RS ...
Страница 64: ...1 Defective ITS Integrated Telephone System Section 64 KX FT21RS ...
Страница 66: ...2 Troubleshooting Flow Chart 66 KX FT21RS ...
Страница 67: ...67 KX FT21RS ...
Страница 69: ...2 3 4 6 Operation Board Section 1 No key operation 2 No LCD indication 69 KX FT21RS ...
Страница 71: ...2 3 4 8 Read Section Refer to 6 4 4 SCANNING BLOCK 71 KX FT21RS ...
Страница 72: ...72 KX FT21RS ...
Страница 73: ...2 3 4 9 Thermal Head Section Refer to 6 4 3 THERMAL HEAD 73 KX FT21RS ...
Страница 78: ...2 4 6 OTHER 78 KX FT21RS ...
Страница 79: ...2 5 TEST FUNCTIONS 79 KX FT21RS ...
Страница 82: ...2 6 1 PRINTOUT EXAMPLE 82 KX FT21RS ...
Страница 84: ...4 DISASSEMBLY INSTRUCTIONS 84 KX FT21RS ...
Страница 85: ...85 KX FT21RS ...
Страница 86: ...86 KX FT21RS ...
Страница 87: ...87 KX FT21RS ...
Страница 88: ...88 KX FT21RS ...
Страница 89: ...89 KX FT21RS ...
Страница 90: ...90 KX FT21RS ...
Страница 91: ...91 KX FT21RS ...
Страница 92: ...92 KX FT21RS ...
Страница 93: ...93 KX FT21RS ...
Страница 94: ...94 KX FT21RS ...
Страница 96: ...5 3 FLAT PACKAGE IC INSTALLATION PROCEDURE 5 4 BRIDGE MODIFICATION PROCEDURE 96 KX FT21RS ...
Страница 112: ...112 KX FT21RS ...
Страница 117: ...6 4 6 3 2 Scanning 6 4 6 3 3 Printing Note See 6 5 SENSERS AND SWITCHES 117 KX FT21RS ...
Страница 118: ...6 4 6 3 4 Copying 118 KX FT21RS ...
Страница 127: ...b Redundancy Compression Process Coding Mode This unit uses one dimensional MH format 127 KX FT21RS ...
Страница 151: ...10 TERMINAL GUIDE OF THE IC S TRANSISTORS AND DIODES 151 KX FT21RS ...
Страница 152: ...11 FIXTURES AND TOOLS 152 KX FT21RS ...
Страница 153: ...12 CABINET MECHANICAL AND ELECTRICAL PARTS LOCATION 12 1 OPERATION PANEL SECTION 153 KX FT21RS ...
Страница 154: ...12 2 UPPER CABINET SECTION 154 KX FT21RS ...
Страница 155: ...12 3 LOWER CABINET P C B SECTION 155 KX FT21RS ...
Страница 157: ...12 5 ACTUAL SIZE OF SCREWS AND WASHER 157 KX FT21RS ...
Страница 158: ...13 ACCESSORIES AND PACKING MATERIALS 158 KX FT21RS ...