8.4.3. THERMAL HEAD
1. Function
This unit utilizes the state of the art thermal printer technology.
The ink film is chemically processed. The ink film is comprised of two parts: an ink layer and a base film. When the thermalhead
contacts this ink film, it emits heat momentarily, and the ink layer is melted and transferred to the paper. If this continues, letters
and/or diagrams appear, and the original document is reproduced.
2. Circuit Operation
Refer to the block diagram and the timing chart on the following page.
There are 9 driver ICs aligned horizontally on the thermal head and each one of these ICs can drive 192 heat-emitting registers.
This means that one line is at a density of 192×9=1728 dots=(8 dots/mm).
White/Black (white=0, black=1) data in one line increment is synchronized at IC520 pin 39 (NEWTHCLK), and sent from IC520
pin 40 (NEWTHDAT) to the shift register of the ICs. The shift registers of the 9 ICs are connected in series, and upon the shift
of the 1728 dot increment, the shift register becomes filled with data, and a latch pulse is emitted to each IC from IC520 pin 38
(NEWTHLAT).
With this latch pulse, all the contents of the shift registers are latched to the latch registers. Thereafter, through the addition of
strobes from the IC520 pins 44 and 45, only the dot location of black (=1) among latched data activates the driver, and the
current passes to heat the emitting body to cause heat emission.
Here, the two line strobes, NEWSTB1 to NEWSTB2, impress as required for one-line printout.
When the thermal head is not used, the IC501 pin 137 (THON) becomes low, Q501 turns OFF, IC506 turns OFF, and the +24V
power supply for the thermal head driver is not impressed to protect the IC.
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KX-FHD333BR
Содержание KX-FHD333BR
Страница 3: ...1 TRANSLATION LISTS 1 1 LCD MESSAGES 3 KX FHD333BR ...
Страница 4: ...1 2 ERROR CODE 1 3 BUTTON LISTS 4 KX FHD333BR ...
Страница 21: ...5 1 2 COMPONENT LOCATIONS 21 KX FHD333BR ...
Страница 32: ...6 2 DISASSEMBLY PROCEDURE 6 2 1 HOW TO REMOVE THE PAPER TRAY AND RECORDING PAPER SUPPORT 32 KX FHD333BR ...
Страница 33: ...6 2 2 HOW TO REMOVE THE OPERATION PANEL BLOCK 33 KX FHD333BR ...
Страница 34: ...6 2 3 HOW TO REMOVE THE OPERATION BOARD AND LCD 34 KX FHD333BR ...
Страница 35: ...6 2 4 HOW TO REMOVE THE IMAGE SENSOR CIS 35 KX FHD333BR ...
Страница 36: ...6 2 5 HOW TO REMOVE THE THERMAL HEAD 36 KX FHD333BR ...
Страница 37: ...6 2 6 HOW TO REMOVE THE PLATEN ROLLER AND BACK COVER 37 KX FHD333BR ...
Страница 38: ...6 2 7 HOW TO REMOVE THE PICKUP ROLLER 38 KX FHD333BR ...
Страница 39: ...6 2 8 HOW TO REMOVE THE CASSETTE LEVER 39 KX FHD333BR ...
Страница 40: ...6 2 9 HOW TO REMOVE THE BOTTOM FRAME 40 KX FHD333BR ...
Страница 41: ...6 2 10 HOW TO REMOVE THE DIGITAL ANALOG POWER SUPPLY SENSOR BOARDS AND AC INLET 41 KX FHD333BR ...
Страница 42: ...6 2 11 HOW TO REMOVE THE MOTOR BLOCK AND SEPARATION ROLLER 42 KX FHD333BR ...
Страница 43: ...6 2 12 HOW TO REMOVE THE GEARS OF MOTOR BLOCK 43 KX FHD333BR ...
Страница 44: ...6 3 INSTALLATION POSITION OF THE LEAD WIRES 44 KX FHD333BR ...
Страница 57: ...7 5 2 SREVICE MODE SETTINGS Note The above values are the default values 57 KX FHD333BR ...
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Страница 86: ...CROSS REFERENCE TEST FUNCTIONS P 50 86 KX FHD333BR ...
Страница 87: ...CROSS REFERENCE TEST FUNCTIONS P 50 87 KX FHD333BR ...
Страница 88: ...CROSS REFERENCE TEST FUNCTIONS P 50 88 KX FHD333BR ...
Страница 89: ...CROSS REFERENCE TEST FUNCTIONS P 50 89 KX FHD333BR ...
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Страница 92: ...CROSS REFERENCE TEST FUNCTIONS P 50 92 KX FHD333BR ...
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Страница 100: ...I O and Pin No Diagram 100 KX FHD333BR ...
Страница 101: ...7 6 7 1 CHECK THE STATUS OF THE DIGITAL BOARD CROSS REFERENCE NG Wave pattern Refer to NG EXAMPLE P 98 101 KX FHD333BR ...
Страница 104: ...7 6 7 3 NG EXAMPLE 104 KX FHD333BR ...
Страница 109: ...7 6 9 2 TROUBLESHOOTING FLOW CHART 109 KX FHD333BR ...
Страница 115: ...7 6 13 THERMAL HEAD SECTION Refer to THERMAL HEAD P 129 115 KX FHD333BR ...
Страница 116: ...8 CIRCUIT OPERATIONS 8 1 CONNECTION DIAGRAM 116 KX FHD333BR ...
Страница 118: ...8 2 1 GENERAL BLOCK DIAGRAM 118 KX FHD333BR ...
Страница 120: ...8 3 2 MEMORY MAP 120 KX FHD333BR ...
Страница 128: ...8 4 2 BLOCK DIAGRAM 128 KX FHD333BR ...
Страница 131: ...TIMING CHART i Print Duty 50 or less ii Print Duty more than 50 131 KX FHD333BR ...
Страница 143: ...b Redundancy Compression Process Coding Mode This unit uses one dimensional MH format 143 KX FHD333BR ...
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Страница 159: ...9 REFERENCE MATERIAL DATA 9 1 TERMINAL GUIDE OF THE ICs TRANSISTORS AND DIODES 159 KX FHD333BR ...
Страница 162: ...9 3 TEST CHART 9 3 1 ITU T No 1 TEST CHART 162 KX FHD333BR ...
Страница 163: ...9 3 2 ITU T No 2 TEST CHART 163 KX FHD333BR ...
Страница 164: ...10 FIXTURES AND TOOLS 164 KX FHD333BR ...
Страница 165: ...11 CABINET MECHANICAL AND ELECTRICAL PARTS LOCATION 11 1 GENERAL SECTION 165 KX FHD333BR ...
Страница 166: ...11 2 OPERATION PANEL SECTION 166 KX FHD333BR ...
Страница 167: ...11 3 BACK COVER SECTION 167 KX FHD333BR ...
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Страница 169: ...11 4 UPPER CABINET SECTION 169 KX FHD333BR ...
Страница 170: ...11 5 LOWER CABINET P C BOARD SECTION CROSS REFERENCE MOTOR SECTION P 171 170 KX FHD333BR ...
Страница 171: ...11 6 MOTOR SECTION 11 7 ACTUAL SIZE OF SCREWS 171 KX FHD333BR ...
Страница 172: ...12 ACCESSORIES AND PACKING MATERIALS 172 KX FHD333BR ...