[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
transistor.
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 2.3.3.6. Power Supply Board Section.
191
KX-FP121AL / KX-FM131AL
Summary of Contents for KX-FP121AL
Page 3: ...15 8 FIXTURES AND TOOLS 231 3 KX FP121AL KX FM131AL ...
Page 9: ...1 11 ITU T No 1 Test Chart 9 KX FP121AL KX FM131AL ...
Page 11: ...1 12 2 CONTROL PANEL 11 KX FP121AL KX FM131AL ...
Page 13: ...1 13 1 Connecting to a computer KX FM131 ONLY 13 KX FP121AL KX FM131AL ...
Page 21: ...1 14 12 REPLACING THE FILM CARTRIDGE 21 KX FP121AL KX FM131AL ...
Page 22: ...22 KX FP121AL KX FM131AL ...
Page 29: ...Note The explanations given in the are for servicemen only 29 KX FP121AL KX FM131AL ...
Page 33: ...2 3 3 TROUBLESHOOTING ITEMS TABLE 33 KX FP121AL KX FM131AL ...
Page 34: ...2 3 3 1 Simple Check List 34 KX FP121AL KX FM131AL ...
Page 36: ...2 Document JAM 36 KX FP121AL KX FM131AL ...
Page 40: ...6 Paper JAM 7 Multiple feed and skew 40 KX FP121AL KX FM131AL ...
Page 43: ...Fig C 12 A blank page is received 43 KX FP121AL KX FM131AL ...
Page 47: ...2 3 3 3 1 Defective facsimile section 1 Transmit problem 47 KX FP121AL KX FM131AL ...
Page 55: ...55 KX FP121AL KX FM131AL ...
Page 56: ...56 KX FP121AL KX FM131AL ...
Page 57: ...57 KX FP121AL KX FM131AL ...
Page 58: ...58 KX FP121AL KX FM131AL ...
Page 59: ...59 KX FP121AL KX FM131AL ...
Page 60: ...60 KX FP121AL KX FM131AL ...
Page 61: ...61 KX FP121AL KX FM131AL ...
Page 62: ...62 KX FP121AL KX FM131AL ...
Page 70: ...I O and Pin No Diagram 70 KX FP121AL KX FM131AL ...
Page 72: ...72 KX FP121AL KX FM131AL ...
Page 74: ...NG Example 74 KX FP121AL KX FM131AL ...
Page 75: ...2 3 3 4 2 Check the Status of the Digital Board 75 KX FP121AL KX FM131AL ...
Page 76: ...2 3 3 4 3 RS 232C serial communication KX FM131 only 76 KX FP121AL KX FM131AL ...
Page 77: ...77 KX FP121AL KX FM131AL ...
Page 80: ...Note Inside the digital board 80 KX FP121AL KX FM131AL ...
Page 83: ...Refer to 2 3 3 5 Analog Board Section 83 KX FP121AL KX FM131AL ...
Page 85: ...2 Troubleshooting Flow Chart 85 KX FP121AL KX FM131AL ...
Page 91: ...91 KX FP121AL KX FM131AL ...
Page 92: ...2 3 3 10 Thermal Head Section Refer to 6 4 3 THERMAL HEAD 92 KX FP121AL KX FM131AL ...
Page 93: ...2 3 3 11 PANA LINK 93 KX FP121AL KX FM131AL ...
Page 94: ...94 KX FP121AL KX FM131AL ...
Page 95: ...95 KX FP121AL KX FM131AL ...
Page 96: ...96 KX FP121AL KX FM131AL ...
Page 97: ...97 KX FP121AL KX FM131AL ...
Page 100: ...100 KX FP121AL KX FM131AL ...
Page 114: ...2 4 7 3 PRINTOUT EXAMPLE 114 KX FP121AL KX FM131AL ...
Page 115: ...115 KX FP121AL KX FM131AL ...
Page 118: ...2 5 3 PRINT TEST PATTERN 1 Platen roller Reference pattern 118 KX FP121AL KX FM131AL ...
Page 119: ...2 Left margin Top margin Reference pattern 119 KX FP121AL KX FM131AL ...
Page 120: ...3 Thermal head 1 dot Reference pattern 120 KX FP121AL KX FM131AL ...
Page 143: ...6 3 2 MEMORY MAP 143 KX FP121AL KX FM131AL ...
Page 155: ...155 KX FP121AL KX FM131AL ...
Page 165: ...6 4 6 3 2 Transmitting documents 6 4 6 3 3 Receiving FAX 165 KX FP121AL KX FM131AL ...
Page 166: ...6 4 6 3 4 Copying 166 KX FP121AL KX FM131AL ...
Page 184: ...184 KX FP121AL KX FM131AL ...
Page 190: ...190 KX FP121AL KX FM131AL ...
Page 204: ...9 6 MEMO KX FP121AL KX FM131AL 204 ...
Page 205: ...10 TERMINAL GUIDE OF THE IC S TRANSISTORS AND DIODES 205 KX FP121AL KX FM131AL ...
Page 206: ...11 FIXTURES AND TOOLS 206 KX FP121AL KX FM131AL ...
Page 208: ...12 2 UPPER CABINET SECTION 208 KX FP121AL KX FM131AL ...
Page 209: ...12 2 1 PICK UP BASE SECTION 209 KX FP121AL KX FM131AL ...
Page 210: ...12 3 LOWER CABINET P C B SECTION 210 KX FP121AL KX FM131AL ...
Page 211: ...12 4 MOTOR SECTION 211 KX FP121AL KX FM131AL ...
Page 212: ...12 5 ACTUAL SIZE OF SCREWS AND WASHER 212 KX FP121AL KX FM131AL ...
Page 213: ...13 ACCESSORIES AND PACKING MATERIALS 213 KX FP121AL KX FM131AL ...