5.5.3.
READ POSITION (PS2)
When a document is brought to the read position, the shelter plate passes the sensor light, the photo transistor becomes ON, and
the input signal of the CN2-5 pin (Operation) becomes a low level. When there is no document at the read position, the shelter plate
closes the sensor light, the photo transistor becomes OFF, and the input signal of the CN2-5 pin (Operation) becomes a high level.
(When checking this sensor, CN1-8 pin, 2pin becomes low level).
Operation Board
Photo transistor
Signal (CN2-5 Pin)
Out of the Read Position
OFF
High level
At the Read Position
ON
Low level
5.5.4. DOCUMENT SENSOR (PS1)
When a document is set, the shelter plate closes the sensor light, the photo transistor becomes OFF, and the input signal of the
CN2-5 pin (Operation) becomes a high level. When there is no document, the shelter plate passes the sensor light, the photo
transistor becomes ON, and the input signal of the CN2-5 pin (Operation) becomes a low level.
(When checking this sensor, the CN1-8 pin, 3pin becomes a low level.)
Operation Board
Photo transistor
Signal (CN2-5 Pin)
No document
ON
Low level
Set document
OFF
High level
120
KX-FT72BR-G
Summary of Contents for KX-FT72BR-G
Page 3: ...1 1 LCD MESSAGE 1 INTRODUCTION 3 KX FT72BR G ...
Page 8: ...1 11 TEST CHART 1 11 1 ITU T NO 1 TEST CHART 8 KX FT72BR G ...
Page 9: ...1 11 2 CCITT NO 2 TEST CHART 9 KX FT72BR G ...
Page 10: ...1 12 LOCATION OF CONTROLS 1 12 1 OVERVIEW 10 KX FT72BR G ...
Page 29: ...2 3 4 3 MULTIPLE FEED CROSS REFERENCE DISASSEMBLY INSTRUCTIONS P 84 29 KX FT72BR G ...
Page 30: ...2 3 4 4 SKEW CROSS REFERENCE DISASSEMBLY INSTRUCTIONS P 84 30 KX FT72BR G ...
Page 34: ...CROSS REFERENCE DISASSEMBLY INSTRUCTIONS P 84 34 KX FT72BR G ...
Page 39: ...2 3 5 1 4 THE UNIT CAN COPY BUT CANNOT TRANSMIT RECEIVE 39 KX FT72BR G ...
Page 45: ...45 KX FT72BR G ...
Page 46: ...CROSS REFERENCE TEST FUNCTIONS P 82 46 KX FT72BR G ...
Page 47: ...CROSS REFERENCE TEST FUNCTIONS P 82 47 KX FT72BR G ...
Page 48: ...48 KX FT72BR G ...
Page 49: ...CROSS REFERENCE TEST FUNCTIONS P 82 CROSS REFERENCE TEST FUNCTIONS P 82 49 KX FT72BR G ...
Page 50: ...50 KX FT72BR G ...
Page 51: ...51 KX FT72BR G ...
Page 52: ...CROSS REFERENCE TEST FUNCTIONS P 82 52 KX FT72BR G ...
Page 58: ...58 KX FT72BR G ...
Page 59: ...Normal Wave Patterns 59 KX FT72BR G ...
Page 61: ...CROSS REFERENCE NG EXAMPLE P 63 CHECK THE STATUS OF THE DIGITAL BOARD P 64 61 KX FT72BR G ...
Page 62: ...CROSS REFERENCE CHECK THE STATUS OF THE DIGITAL BOARD P 64 62 KX FT72BR G ...
Page 63: ...2 3 6 2 NG EXAMPLE 63 KX FT72BR G ...
Page 66: ...2 3 7 2 DEFECTIVE ITS INTEGRATED TELEPHONE SYSTEM SECTION 66 KX FT72BR G ...
Page 68: ...2 Troubleshooting Flow Chart 68 KX FT72BR G ...
Page 69: ...69 KX FT72BR G ...
Page 73: ...2 3 11 READ SECTION Refer to SCANNING BLOCK P 112 73 KX FT72BR G ...
Page 79: ...2 4 5 SERVICE MODE SETTINGS Example of a printed out list 79 KX FT72BR G ...
Page 85: ...3 2 HOW TO REMOVE THE OPERATION BLOCK 85 KX FT72BR G ...
Page 86: ...3 3 HOW TO REMOVE THE OPERATION BOARD AND LCD 86 KX FT72BR G ...
Page 87: ...3 4 HOW TO REMOVE THE BOTTOM FRAME AND ANALOG BOARD 87 KX FT72BR G ...
Page 88: ...3 5 HOW TO REMOVE THE DIGITAL POWER SUPPLY BOARD AND AC INLET 88 KX FT72BR G ...
Page 89: ...3 6 HOW TO REMOVE THE MOTOR BLOCK AND SEPARATION ROLLER 89 KX FT72BR G ...
Page 90: ...3 7 HOW TO REMOVE THE MOTOR AND GEARS OF MOTOR BLOCK 90 KX FT72BR G ...
Page 91: ...3 8 HOW TO REMOVE THE IMAGE SENSOR CIS 91 KX FT72BR G ...
Page 92: ...3 9 HOW TO REMOVE THE DOCUMENT FEED ROLLER 92 KX FT72BR G ...
Page 93: ...3 10 HOW TO REMOVE THE THERMAL HEAD 93 KX FT72BR G ...
Page 94: ...3 11 INSTALLATION POSITION OF THE LEAD WIRES 94 KX FT72BR G ...
Page 96: ...4 3 FLAT PACKAGE IC INSTALLATION PROCEDURE 4 4 BRIDGE MODIFICATION PROCEDURE 96 KX FT72BR G ...
Page 97: ...5 CIRCUIT OPERATIONS 5 1 CONNECTION DIAGRAM 97 KX FT72BR G ...
Page 99: ...5 2 1 General Block Diagram 99 KX FT72BR G ...
Page 109: ...5 4 2 BLOCK DIAGRAM 109 KX FT72BR G ...
Page 111: ...111 KX FT72BR G ...
Page 117: ...5 4 6 3 4 COPYING CROSS REFERENCE SENSOR SECTION P 72 117 KX FT72BR G ...
Page 132: ...5 10 1 CIRCUIT DIAGRAM 132 KX FT72BR G ...
Page 135: ...5 12 POWER SUPPLY BOARD SECTION 135 KX FT72BR G ...
Page 137: ...6 TERMINAL GUIDE OF THE ICs TRANSISTORS AND DIODES 137 KX FT72BR G ...
Page 138: ...7 FIXTURES AND TOOLS 138 KX FT72BR G ...
Page 140: ...8 2 UPPER CABINET SECTION 140 KX FT72BR G ...
Page 141: ...8 3 LOWER CABINET P C B SECTION CROSS REFFERENCE MOTOR SECTION P 142 141 KX FT72BR G ...
Page 142: ...8 4 MOTOR SECTION 142 KX FT72BR G ...
Page 143: ...8 5 ACTUAL SIZE OF SCREWS 143 KX FT72BR G ...
Page 144: ...9 ACCESSORIES AND PACKING MATERIALS 144 KX FT72BR G ...
Page 163: ...163 KX FT72BR G Y M KXFT72BRG ...