7.16. POWER SUPPLY BOARD SECTION
This power supply board uses the switching regulator method.
PC2
F2
D10-D13,C5
Q1
T1
PC1
IC501
Input
Filter
Circuit
Block
Rectification
and smoothing
Circuit Block
Switching
Circuit
Block
Transformer
Control
Circuit Block
Photo-Coupler
24V Circuit
Block
5V Circuit
Block
3.3V Circuit
Block
AC OUT
AC Output
Circuit Block
Optical Isolator
HTRCTL
24V
PWRDWN
5V
3.3V
GND
F1
[Filter circuit]
The filter circuit eliminates the noise from power supply unit not to leak it outside, and also the circuit prevents an incoming
noise. Varistor Z1 deals with the excessive surge voltage from thunder, etc.
[Rectifier and Smoothing Circuit]
AC voltage is rectified by D10, D11, D12 and D13, and smoothed by C5. Then DC voltage is supplied to the switching circuit.
[Switching Circuit]
This circuit has self-excited Ringing Choke Converter.
This system supplies DC voltage through the following process: The DC voltage provided from the Rectifier and Smoothing
Circuit is converted into RF pulse by switching ON/OFF MOS FET Q1 repeatedly. While Q1 is switched ON, the energy is
charged in the primary of T1, and it will be discharged to the secondary of T1 while Q1 is OFF.
[Switching Control Circuit]
The constant voltage is controlled by the feedback from the 24V output via the photo coupler PC1
The overcurrent protection circuit detects the extension of the ON time caused by heavier output load, and makes the control
circuit prolong the OFF time of Q1. Thus the circuit eliminates the charged energy in the primary of T1. When the output voltage
rises above 24V, the zener diode D104 between 24V output and GND breaks down. The over voltage protection works when
the overload causes the overcurrent protection circuit of the control circuit to be activated.
[24V Circuit]
The output from the transformer T1 is rectified by D101 and smoothed by C101, and then 24V is output.
[5V circuit]
The output from the transformer T1 is rectified by D501 and smoothed by C501, and then the stabilized 5V is output through
the automatic voltage regulator IC501.
[3.3V Circuit]
The 3.3V output from above-mentioned 24V circuit is regulated at the step-down chopper circuit. In this method, the energy is
supplied to the load via L271while MOS FET Q271 is turned ON, and the charged energy in L271 will be supplied to the load
via D271 during the OFF time.
The shunt regulator IC201 detects the 3.3V output and feeds back, and then the constant voltage is controlled.
When the output voltage goes down and Q274 is turned OFF, the short-circuit protection circuit keeps the power OFF until the
power is turned ON again.
[Heater Circuit]
When HTRCTL signal turns “high”, the voltage is supplied to the gate 1 of the triac SCR1 via the photo coupler PC2, which
causes the triac SCR1 to be turned ON. Consequently the heater output is turned ON.
Dummy load method (to quickly check the power supply output)
Refer to POWER SUPPLY BOARD SECTION (P.152).
204
KX-FLM652CX
Содержание KX-FLM652CX
Страница 11: ...3 INSTALLATION 3 1 LOCATION OF CONTROLS 3 1 1 OVERVIEW 11 KX FLM652CX ...
Страница 19: ...To remove the paper tray Pull the paper tray forward in the direction of the arrow 19 KX FLM652CX ...
Страница 24: ...3 4 9 SETTING YOUR LOGO The logo can be your company division or name 24 KX FLM652CX ...
Страница 44: ...5 DISASSEMBLY INSTRUCTIONS 44 KX FLM652CX ...
Страница 47: ...5 3 HOW TO REMOVE THE OPERATION PANEL ASS Y 47 KX FLM652CX ...
Страница 48: ...5 4 HOW TO REMOVE THE PICK UP UNIT 48 KX FLM652CX ...
Страница 49: ...5 5 HOW TO REMOVE THE PICK UP ROLLER 49 KX FLM652CX ...
Страница 50: ...5 6 HOW TO REMOVE THE OPERATION BOARD 50 KX FLM652CX ...
Страница 51: ...5 7 HOW TO REMOVE THE LOWER FRAME 5 8 HOW TO REMOVE THE SEPARATION RUBBER 51 KX FLM652CX ...
Страница 52: ...5 9 HOW TO REMOVE THE TRANSFER ROLLER 52 KX FLM652CX ...
Страница 53: ...5 10 HOW TO REMOVE THE SEPARATION ROLLER 53 KX FLM652CX ...
Страница 54: ...5 11 HOW TO REMOVE THE BOTTOM PLATE 5 12 HOW TO REMOVE THE ANALOG BOARD 54 KX FLM652CX ...
Страница 55: ...5 13 HOW TO REMOVE THE HIGH VOLTAGE POWER BOARD 5 14 HOW TO REMOVE THE LASER UNIT 55 KX FLM652CX ...
Страница 56: ...5 15 HOW TO REMOVE THE FAN UNIT 5 16 HOW TO REMOVE THE LOW VOLTAGE POWER BOARD 56 KX FLM652CX ...
Страница 57: ...5 17 HOW TO REMOVE THE SOLENOID 5 18 HOW TO REMOVE THE HANDSET HOLDER 57 KX FLM652CX ...
Страница 58: ...5 19 HOW TO REMOVE THE MAIN MOTOR 58 KX FLM652CX ...
Страница 59: ...5 20 HOW TO REMOVE THE FUSER UNIT 59 KX FLM652CX ...
Страница 60: ...5 21 HOW TO REMOVE THE CIS 60 KX FLM652CX ...
Страница 61: ...5 22 NOTE FOR ASSEMBLING 5 22 1 FCC DIGITAL BOARD 5 22 2 DOCUMENT STACKER 5 22 3 THERMOSTAT 61 KX FLM652CX ...
Страница 62: ...5 23 INSTALLATION POSITION OF THE LEAD 62 KX FLM652CX ...
Страница 98: ...6 6 7 3 DARK OR WHITE HORIZONTAL LINE CROSS REFERENCE HIGH VOLTAGE SECTION P 148 98 KX FLM652CX ...
Страница 99: ...6 6 7 4 DIRTY OR HALF DARKNESS BACKGROUND CROSS REFERENCE HIGH VOLTAGE SECTION P 148 99 KX FLM652CX ...
Страница 100: ...6 6 7 5 BLACK PRINT CROSS REFERENCE HIGH VOLTAGE SECTION P 148 LSU SECTION P 145 100 KX FLM652CX ...
Страница 101: ...6 6 7 6 LIGHT PRINT CROSS REFERENCE HIGH VOLTAGE SECTION P 148 101 KX FLM652CX ...
Страница 102: ...6 6 7 7 BLACK DENSITY IS LIGHT OR UNEVEN CROSS REFERENCE HIGH VOLTAGE SECTION P 148 102 KX FLM652CX ...
Страница 103: ...6 6 7 8 BLANK PRINT 6 6 7 9 BLACK OR WHITE POINT 103 KX FLM652CX ...
Страница 104: ...6 6 8 RECORDING PAPER FEED 6 6 8 1 MULTIPLE FEED 6 6 8 2 THE RECORDING PAPER IS WAVED OR WRINKLED 104 KX FLM652CX ...
Страница 105: ...6 6 8 3 SKEW 105 KX FLM652CX ...
Страница 106: ...6 6 8 4 THE RECORDING PAPER DOES NOT FEED CROSS REFERENCE SENSOR SECTION P 140 MOTOR SECTION P 143 106 KX FLM652CX ...
Страница 109: ...6 6 8 6 BACK SIDE OF THE RECORDING PAPER IS DIRTY CROSS REFERENCE HIGH VOLTAGE SECTION P 148 109 KX FLM652CX ...
Страница 111: ...CROSS REFERENCE MOTOR SECTION P 143 111 KX FLM652CX ...
Страница 112: ...6 6 9 2 SKEW ADF 112 KX FLM652CX ...
Страница 114: ...6 6 9 5 THE RECEIVED OR COPIED DATA IS EXPANDED 114 KX FLM652CX ...
Страница 115: ...6 6 9 6 BLACK OR WHITE VERTICAL LINE IS COPIED 115 KX FLM652CX ...
Страница 116: ...6 6 9 7 AN ABNORMAL IMAGE IS COPIED CROSS REFERENCE CIS Contact Image Sensor SECTION P 146 116 KX FLM652CX ...
Страница 125: ...125 KX FLM652CX ...
Страница 128: ...CROSS REFERENCE TEST FUNCTIONS P 69 128 KX FLM652CX ...
Страница 129: ...CROSS REFERENCE TEST FUNCTIONS P 69 129 KX FLM652CX ...
Страница 130: ...CROSS REFERENCE TEST FUNCTIONS P 69 130 KX FLM652CX ...
Страница 131: ...CROSS REFERENCE TEST FUNCTIONS P 69 131 KX FLM652CX ...
Страница 132: ...132 KX FLM652CX ...
Страница 133: ...133 KX FLM652CX ...
Страница 134: ...CROSS REFERENCE TEST FUNCTIONS P 69 134 KX FLM652CX ...
Страница 143: ...6 6 13 6 MOTOR SECTION 6 6 13 6 1 ENGINE MOTOR 143 KX FLM652CX ...
Страница 144: ...6 6 13 6 2 ADF MOTOR 144 KX FLM652CX ...
Страница 145: ...6 6 13 7 LSU SECTION CROSS REFERENCE LSU Laser Scanning Unit SECTION P 183 145 KX FLM652CX ...
Страница 146: ...6 6 14 CIS Contact Image Sensor SECTION CROSS REFERENCE TEST FUNCTIONS P 69 146 KX FLM652CX ...
Страница 148: ...6 6 16 HIGH VOLTAGE SECTION 148 KX FLM652CX ...
Страница 149: ...149 KX FLM652CX ...
Страница 150: ...150 KX FLM652CX ...
Страница 153: ...6 6 17 2 TROUBLESHOOTING FLOW CHART 153 KX FLM652CX ...
Страница 154: ...154 KX FLM652CX ...
Страница 155: ...7 CIRCUIT OPERATIONS 7 1 CONNECTION DIAGRAM 155 KX FLM652CX ...
Страница 177: ...7 7 1 2 ENGINE MOTOR DRIVE CIRCUIT 177 KX FLM652CX ...
Страница 183: ...7 10 LSU Laser Scanning Unit SECTION 183 KX FLM652CX ...
Страница 184: ...184 KX FLM652CX ...
Страница 191: ...191 KX FLM652CX ...
Страница 213: ...8 1 11 Timing Chart Initializing Long 213 KX FLM652CX ...
Страница 214: ...8 1 12 Timing Chart when the registration sensor is turned OFF then ON during initializing 214 KX FLM652CX ...
Страница 215: ...8 2 TERMINAL GUIDE OF THE ICs TRANSISTORS AND DIODES 8 2 1 DIGITAL BOARD 215 KX FLM652CX ...
Страница 216: ...8 2 2 ANALOG BOARD 8 2 3 OPERATION BOARD 8 2 4 MOTOR DRIVER BOARD 216 KX FLM652CX ...
Страница 217: ...8 2 5 HIGH VOLTAGE POWER BOARD 217 KX FLM652CX ...
Страница 218: ...8 2 6 LOW VOLTAGE POWER BOARD 8 2 7 DRUN AND TONER SENSOR BOARD PARTS 218 KX FLM652CX ...
Страница 221: ...8 4 1 NG EXAMPLE 221 KX FLM652CX ...
Страница 227: ...227 KX FLM652CX ...
Страница 228: ...8 6 TEST CHART 8 6 1 ITU T No 1 TEST CHART 228 KX FLM652CX ...
Страница 229: ...8 6 2 ITU T No 2 TEST CHART 229 KX FLM652CX ...
Страница 230: ...9 FIXTURES AND TOOLS 230 KX FLM652CX ...
Страница 231: ...10 CABINET MECHANICAL AND ELECTRICAL PARTS LOCATION 10 1 GENERAL SECTION 231 KX FLM652CX ...
Страница 232: ...10 2 OPERATION COVER SECTION 1 232 KX FLM652CX ...
Страница 233: ...10 3 OPERATION COVER SECTION 2 233 KX FLM652CX ...
Страница 234: ...10 4 OPERATION COVER SECTION 3 234 KX FLM652CX ...
Страница 235: ...10 5 PICK UP SECTION 235 KX FLM652CX ...
Страница 236: ...10 6 FUSER SECTION 236 KX FLM652CX ...
Страница 237: ...10 7 UPPER MAIN CABINET SECTION 237 KX FLM652CX ...
Страница 238: ...10 8 LOWER MAIN CABINET SECTION 1 238 KX FLM652CX ...
Страница 239: ...10 9 LOWER MAIN CABINET SECTION 2 239 KX FLM652CX ...
Страница 240: ...10 10 LOWER MAIN CABINET SECTION 3 240 KX FLM652CX ...
Страница 241: ...10 11 ACTUAL SIZE OF SCREWS AND WASHER 241 KX FLM652CX ...
Страница 242: ...11 ACCESSORIES AND PACKING MATERIALS 242 KX FLM652CX ...
Страница 261: ...261 KX FLM652CX ...
Страница 270: ...15 8 MEMO 270 KX FLM652CX ...
Страница 278: ...278 KX FLM652CX ...
Страница 286: ...286 KX FLM652CX K N KXFLM652CX ...