System Description
6–39
In the actual circuit, the fixed output voltages are obtained by changing the winding ratio of transformer T101.
In this converter circuit, the output voltages are stabilized by controlling the duty cycle of the ON and OFF
timing of the transistor. In this power supply, the bias winding is built into the transformer. The power supply
has three outputs, +24 VDC, –12 VDC and +5 VDC. The +24 VDC output is protected by the Error Detection
Circuit, and the +5 VDC and –12 VDC outputs are protected by the circuitry inside of the voltage regulator
IC.
Control Circuit and Error Detection Circuit
The control circuit amplifies the output of the duty cycle according to the error voltage detected by the Error
Detection Circuit, and drives the main transistor Q102. The method used to change the duty cycle is to
change the ON time period. When the output voltage of the +24 VDC circuit rises, the current of photocoupler
PC101 increases, the output pulse width of the control circuit decreases and the ON time period of Q102
decreases. This control circuit decides the minimum OFF time period by itself. When the oscillation
frequency becomes higher and the OFF time period becomes minimum, the OFF time period remains
unchanged and only the ON time period decreases. This way, there is a upper limit of the oscillation
frequency and the duty cycle is expanded.
Over Current Limiter
The +24 VDC output is limited by Ton MAX Limiter (ON time period of transistor Q102) which is part of the
control circuit. The +5 VDC and –12 VDC outputs have over current limiters provided inside the voltage
regulator.
Содержание PANAFAX DF-1100
Страница 1: ...DF 1100 Facsimile ORDER NO MGCS980901C0 H13 Standard Version ...
Страница 8: ...vi Notes ...
Страница 9: ...7 Chapter 1 General Description ...
Страница 17: ...General Description 1 9 External View ...
Страница 18: ...Panasonic DF 1100 1 10 Control Panel ...
Страница 22: ...Panasonic DF 1100 1 14 Notes ...
Страница 23: ...Chapter 2 Disassembly Instruction ...
Страница 55: ...Disassembly Instruction 2 33 2 16 Screw Identification Template ...
Страница 56: ...Panasonic DF 1100 2 34 Notes ...
Страница 57: ...Chapter 3 Maintenance Adjustments and Check Points ...
Страница 64: ...Panasonic DF 1100 3 8 3 7 General Circuit Diagram 3 7 1 Fax Circuit ...
Страница 65: ...Maintenance Adjustments and Checkpoints 3 9 3 7 2 Printer Circuit ...
Страница 66: ...Panasonic DF 1100 3 10 3 7 3 Option Cassette Circuit ...
Страница 92: ...Panasonic DF 1100 3 36 3 10 LCE PCB CN20 CN21 CN25 1 15 TEL LINE ...
Страница 99: ...Maintenance Adjustments and Checkpoints 3 43 3 12 PNS1 PCB CN39 11 1 ...
Страница 113: ...Chapter 4 Troubleshooting ...
Страница 166: ...Panasonic DF 1100 4 54 Notes ...
Страница 167: ...Chapter 5 Test Modes ...
Страница 192: ...Panasonic DF 1100 5 26 Fuser Error Detection ...
Страница 196: ...Panasonic DF 1100 5 30 Notes ...
Страница 197: ...Chapter 6 System Description ...
Страница 236: ...Panasonic DF 1100 6 40 Notes ...
Страница 237: ...Chapter 7 Exploded View Parts List ...
Страница 244: ...Panasonic DF 1100 7 8 Notes ...
Страница 250: ...Panasonic DF 1100 7 14 Notes ...
Страница 254: ...Panasonic DF 1100 7 18 Notes ...
Страница 258: ...Panasonic DF 1100 7 22 Notes ...
Страница 264: ...Panasonic DF 1100 7 28 Notes ...
Страница 274: ...Panasonic DF 1100 7 38 Notes ...
Страница 275: ...Chapter 8 Installation ...
Страница 276: ...Panasonic DF 1100 8 2 Notes ...
Страница 291: ...Chapter 9 Options and Supplies ...
Страница 296: ...Panasonic DF 1100 9 6 Notes ...
Страница 297: ...Chapter 10 Schematic Diagram ...
Страница 298: ...Panasonic DF 1100 10 2 ...
Страница 299: ...Schematic Diagram 10 3 ...
Страница 300: ...Panasonic DF 1100 10 4 ...
Страница 301: ...Schematic Diagram 10 5 ...
Страница 302: ...Panasonic DF 1100 10 6 ...
Страница 303: ...Schematic Diagram 10 7 ...
Страница 304: ...Panasonic DF 1100 10 8 ...
Страница 305: ...Schematic Diagram 10 9 ...
Страница 306: ...Panasonic DF 1100 10 10 ...
Страница 307: ...Schematic Diagram 10 11 ...
Страница 308: ...Panasonic DF 1100 10 12 ...
Страница 309: ...Schematic Diagram 10 13 ...
Страница 310: ...Panasonic DF 1100 10 14 ...
Страница 311: ...Schematic Diagram 10 15 ...
Страница 312: ...Panasonic DF 1100 10 16 ...
Страница 313: ...Schematic Diagram 10 17 ...
Страница 314: ...Panasonic DF 1100 10 18 ...
Страница 315: ...Schematic Diagram 10 19 ...
Страница 316: ...Panasonic DF 1100 10 20 ...
Страница 317: ...Schematic Diagram 10 21 ...
Страница 318: ...Panasonic DF 1100 10 22 ...
Страница 319: ...Schematic Diagram 10 23 ...
Страница 320: ...Panasonic DF 1100 10 24 ...
Страница 321: ...Schematic Diagram 10 25 ...
Страница 322: ...Panasonic DF 1100 10 26 ...
Страница 323: ...Schematic Diagram 10 27 ...
Страница 324: ...Panasonic DF 1100 10 28 ...
Страница 325: ...Schematic Diagram 10 29 ...
Страница 326: ...Panasonic DF 1100 10 30 ...
Страница 327: ...Schematic Diagram 10 31 ...
Страница 328: ...Panasonic DF 1100 10 32 ...
Страница 329: ...Schematic Diagram 10 33 ...
Страница 330: ...Panasonic DF 1100 10 34 LVPS 100V ...
Страница 331: ...Schematic Diagram 10 35 LVPS 200V ...
Страница 332: ...Panasonic DF 1100 10 36 Note ...
Страница 333: ...Printed in Japan DZZSM064 ...