95
KX-MB2230JT/ KX-MB2270JT/ KX-MB2515JT/ KX-MB2545JT/ KX-MB2575JT/ DP-MB310JT
6.19. Power Supply Board Section
The power supply board circuit generates 24Vdc and 12Vdc at normal mode.
It also supplies AC voltage to the halogen heat lamp in the fuser unit.
The power supply board uses the switching regulator method, and it has a power save function.
[Input Circuit]
The input current goes into the input rectifier circuit through the filter circuit.
The filter circuit decreases the noise voltage and the noise electric field strength.
[Rectifier Circuit]
The input circuit is rectified by D10 and charge C5 to make DC voltage.
Then it supplies power to the converter circuit.
[Kick-on Voltage Circuit]
Bias is applied to the Q1 gate via this circuit when the AC power is turned on and Q1 begins operating.
[Control Circuit and Error Detecting Circuit 1]
The control circuit detects the voltage that increased in an error detect circuit 1 and controls it to become the predetermined out-
put voltage.
This is shown as follows.
When the output voltage of the 24V circuit or 12V circuit increases, the current of the photo coupler PC1 increases, the pulse
width of the output control IC becomes narrower and the ON period of Q1 becomes shorter.
[Power Saving Function]
Output voltage is changed by PWRDWN signal.
[Over Current Protection (O.C.P)]
The highest drain current of Q1 is limited by a over current circuit. The 24V or 12V output is limited by this circuit.
[Over Voltage Protection (O.V.P)/ Error Detecting Circuit 2]
If the 24V or 12V output increases because the error detecting circuit 1 or control circuit is broken, control circuit will recognize
this signal and output becomes 0V.
Dummy load method (to quickly check the power supply output).
Refer to
Condition
PWRDWN
24Vout
12Vout
Normal
Open
24V
12V
Power Save
Low (0V)
12-20V
7V
Summary of Contents for KX-MB2230JT
Page 65: ...65 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT ...
Page 135: ...135 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT ...
Page 136: ...136 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT KX MB2270 ...
Page 137: ...137 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT ...
Page 138: ...138 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT KX MB2575 ...
Page 139: ...139 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT ...
Page 140: ...140 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT ...
Page 141: ...141 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT DP MB310JT ...
Page 142: ...142 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT ...
Page 143: ...143 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT ...
Page 144: ...144 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT KX MB2515 ...
Page 145: ...145 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT ...
Page 146: ...146 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT KX MB2545 ...
Page 147: ...147 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT ...
Page 153: ...153 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT KX MB2270 ...
Page 154: ...154 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT KX MB2575 ...
Page 155: ...155 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT DP MB310JT ...
Page 156: ...156 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT KX MB2515 ...
Page 194: ...194 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT 12 3 7 3 Skew ...
Page 200: ...200 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT 12 3 8 2 Skew ADF ...
Page 212: ...212 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT ...
Page 214: ...214 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT ...
Page 219: ...219 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT ...
Page 220: ...220 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT ...
Page 234: ...234 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT 12 3 15 2 FB Motor ...
Page 241: ...241 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT 2 CHG GRID ...
Page 242: ...242 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT 3 TRA ...
Page 243: ...243 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT 3 DEV DC ...
Page 244: ...244 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT TRA ...
Page 247: ...247 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT ...
Page 274: ...274 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT ...
Page 287: ...287 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT ...
Page 293: ...293 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT ...
Page 294: ...294 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT ...
Page 295: ...295 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT ...
Page 296: ...296 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT ...
Page 325: ...325 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT 15 6 1 NG Example ...
Page 342: ...342 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT Memo ...
Page 356: ...356 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT Memo ...
Page 370: ...370 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT Memo ...
Page 384: ...384 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT Memo ...
Page 398: ...398 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT Memo ...
Page 437: ...437 KX MB2230JT KX MB2270JT KX MB2515JT KX MB2545JT KX MB2575JT DP MB310JT Memo ...