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KX-FP365CX / KX-FM388CX
[Surge Absorber Circuit]
This circuit is for absorbing surge voltage generated by the transformer.
[Control Circuit and Detecting Circuit]
The control circuit amplifies the output with increased voltage detected in the error detecting circuit. Then it drives the main tran-
sistor.
In this power supply, the duty ratio is defined by changing the ON period of the main transistor.
This is shown as follows.
When the output voltage of the 24V circuit increases, the current of the photo coupler PC101 increases, the pulse width of the
output control IC becomes narrower and the ON period of Q101 becomes shorter.
[Over Current Limiter (O.C.L)]
The highest drain current (Q101) is limited by a limiter circuit (IC101) of 24V. The 24V output is limited by this circuit.
[Over Voltage Circuit]
If the 24V output increases because the error detecting circuit or control circuit is broken, IC101 will recognize this signal and
output becomes 0V.
Dummy load method (to quickly check the power supply output)
Refer to
Summary of Contents for KX-FM388CX
Page 12: ...12 KX FP365CX KX FM388CX 6 Technical Descriptions 6 1 Connection Diagram ...
Page 14: ...14 KX FP365CX KX FM388CX 6 2 1 General Block Diagram ...
Page 16: ...16 KX FP365CX KX FM388CX 6 3 2 Memory Map ...
Page 25: ...25 KX FP365CX KX FM388CX 6 4 2 Block Diagram ...
Page 27: ...27 KX FP365CX KX FM388CX ...
Page 78: ...78 KX FP365CX KX FM388CX Countermeasure ...
Page 79: ...79 KX FP365CX KX FM388CX REFERENCE Test Mode P 63 ...
Page 80: ...80 KX FP365CX KX FM388CX REFERENCE Test Mode P 63 ...
Page 81: ...81 KX FP365CX KX FM388CX REFERENCE Test Mode P 63 ...
Page 82: ...82 KX FP365CX KX FM388CX REFERENCE Test Mode P 63 ...
Page 83: ...83 KX FP365CX KX FM388CX ...
Page 84: ...84 KX FP365CX KX FM388CX ...
Page 85: ...85 KX FP365CX KX FM388CX REFERENCE Test Mode P 63 ...
Page 89: ...89 KX FP365CX KX FM388CX ...
Page 114: ...114 KX FP365CX KX FM388CX ...
Page 121: ...121 KX FP365CX KX FM388CX I O and Pin No Diagram ...
Page 124: ...124 KX FP365CX KX FM388CX 12 5 5 2 NG Example ...
Page 130: ...130 KX FP365CX KX FM388CX 12 5 8 2 Troubleshooting Flow Chart ...
Page 136: ...136 KX FP365CX KX FM388CX 12 5 12 Thermal Head Section Note Refer to Thermal Head P 26 ...
Page 139: ...139 KX FP365CX KX FM388CX 13 Service Fixture Tools ...
Page 142: ...142 KX FP365CX KX FM388CX 14 1 2 How to Remove the Thermal Head ...
Page 144: ...144 KX FP365CX KX FM388CX 14 2 2 How to Remove the Pickup Roller ...
Page 145: ...145 KX FP365CX KX FM388CX 14 2 3 How to Remove the Paper Exit Roller and Cassette Lever ...
Page 146: ...146 KX FP365CX KX FM388CX 14 3 Lower Cabinet Section 14 3 1 How to Remove the Bottom Frame ...
Page 147: ...147 KX FP365CX KX FM388CX 14 3 2 How to Remove the Digital Analog Interface and Sensor Boards ...
Page 148: ...149 KX FP365CX KX FM388CX 14 3 4 How to Remove the Gear Block and Separation Roller ...
Page 149: ...148 KX FP365CX KX FM388CX 14 3 3 How to Remove the Power Supply Board and AC cord ...
Page 150: ...150 KX FP365CX KX FM388CX 14 3 5 How to Remove the Component parts of Gear Block ...
Page 153: ...153 KX FP365CX KX FM388CX 14 4 3 How to Remove the Separation Rubber ...
Page 154: ...154 KX FP365CX KX FM388CX 14 5 Installation Position of the Lead Wires ...
Page 155: ...155 KX FP365CX KX FM388CX ...
Page 168: ...168 KX FP365CX KX FM388CX 16 1 4 Power Supply Board 16 1 5 Interface Board ...
Page 170: ...170 KX FP365CX KX FM388CX 16 3 Test Chart 16 3 1 ITU T No 1 Test chart ...
Page 171: ...171 KX FP365CX KX FM388CX 16 3 2 ITU T No 2 Test Chart ...
Page 172: ...172 KX FP365CX KX FM388CX 16 3 3 Test Chart ...
Page 173: ...173 KX FP365CX KX FM388CX Memo ...
Page 194: ...194 KX FP365CX KX FM388CX 20 1 2 Operation Cover Section ...
Page 195: ...195 KX FP365CX KX FM388CX 20 1 3 Back Cover Section ...
Page 196: ...196 KX FP365CX KX FM388CX ...
Page 197: ...197 KX FP365CX KX FM388CX 20 1 4 Upper Cabinet Section ...
Page 198: ...198 KX FP365CX KX FM388CX 20 1 5 Lower Cabinet Section ...
Page 199: ...199 KX FP365CX KX FM388CX 20 1 6 Gear Block Section 20 1 7 Screws ...
Page 200: ...200 KX FP365CX KX FM388CX 20 1 8 Accessories and Packing Materials ...