3.5.12. Toner Empty Sensor Circuit
This circuit has 4 toner empty detection circuits for cyan, magenta, yellow and black toner cartridges. These circuits are used for
detecting whether the toner is low ( or empty ) or if toner cartridge is installed or not.
<Yellow Toner Empty Detection Circuit>
The ASIC IC14 sends the pulse signal EMPLEDY from pin 202 of IC14 to the transistor Q10. When the signal EMPLEDY is a low
level, the transistor Q10 is turn on, turning on the LED D1504. This signal EMPLEDY is a pulse signal which causes LED D1504
to blink. If the toner is empty, the light from LED D1504 is reflected by the mirror installed on the toner cartridge drive unit, transmits
the yellow toner cartridge frame and reaches the photo transistors Q1504, turning the photo transistor Q1504 on. When the photo
transistor Q1504 is turned on, the voltage signal EMPY (pin 4 of IC7) becomes the reference voltage approxi13.2V or less,
sending the high level toner empty detection signal EMPY from pin 2 of the comparator IC35 to pin 207 of IC14.
When the toner cartridge is installed:
Detection of the toner cartridge, toner low or toner empty is performed when the power is turned on (or toner cartridge cover is
opened & closed).
When the toner is not empty or not low:
The signal EMPY usually is low because the light from D1504 is blocked by the toner in the
toner cartridge. Within the predetermined time, IC14 cannot receives the predetermined high
level pulse number of signal EMPY. As a result, CPU recognizes that the toner cartridge is in
the printer and the toner is enough.
When the toner is empty or low:
The sensor paddle, which rotates when the OPC is rotating, is located in the toner cartridge
(see the following Figure-1). When this sensor paddle is in the light path, the signal EMPY is
low because the light from D1504 is blocked by the sensor paddle. If the toner is empty or low,
IC14 receives the high level pulse number of signal EMPY less than the pulse number of
signal EMPLEDY within a predetermined. As a result, the CPU recognizes that the toner
cartridge is the toner empty or low. Detection of the low (or toner empty) is performed when
the OPC is rotating. If the toner is low (or empty), the user error message “Low Yellow Toner
“(or “TC-Y Toner Empty) is displayed on the LCD display.
When the toner cartridge is not installed:
Detection of the toner cartridge is performed when the power is turned on (or when the toner cartridge cover is opened & closed).
When the toner cartridge is not installed, the signal EMPY usually is high when the signal EMPLEDY is high because the light from
D1504 is not blocked by the toner or sensor paddle (see the following Figure-1). Within a predertermined time, the signals EMPY
and signal EMPLEDY which IC14 receives are the same in pulse number. As a result, the CPU recognizes that the toner cartridge
is not in the printer. The user error message “TC-Y Not Installed” is displayed on the LCD display.
The black, magenta and cyan toner empty detection circuits function in the same manner as the yellow toner empty detection
circuit.
38
DP-CL18
Summary of Contents for Workio DP-CL18
Page 8: ...1 2 15 LCD Board Marked PbF 8 DP CL18 ...
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Page 36: ...36 DP CL18 ...
Page 39: ...39 DP CL18 ...
Page 44: ...3 5 17 Automatic Duplex Unit ADU Detection and ADU Jam Detection Sensor Circuits 44 DP CL18 ...
Page 64: ...64 DP CL18 ...
Page 67: ...67 DP CL18 ...
Page 71: ...4 Troubleshooting 4 1 Initial Troubleshooting Flowchart 71 DP CL18 ...
Page 72: ...4 2 Jam 4 2 1 Print Media Problem 72 DP CL18 ...
Page 73: ...4 2 2 Print Media Skew 73 DP CL18 ...
Page 74: ...4 2 3 Paper Jam at the media tray 74 DP CL18 ...
Page 75: ...4 2 4 Paper Jams at the registration roller 75 DP CL18 ...
Page 76: ...4 2 5 Paper Jams at the 2nd bias transfer roller 76 DP CL18 ...
Page 77: ...4 2 6 Paper Jams at the fuser unit 77 DP CL18 ...
Page 78: ...4 2 7 Multi purpose Tray Jams 78 DP CL18 ...
Page 79: ...4 2 8 Wrong paper length Jams 79 DP CL18 ...
Page 80: ...4 2 9 Paper Jams at the upper optional media tray OPF1 80 DP CL18 ...
Page 81: ...4 2 10 Paper Jams at the lower optional media tray OPF2 81 DP CL18 ...
Page 82: ...4 2 11 Paper Jam at automatic duplex unit ADU 82 DP CL18 ...
Page 83: ...4 2 12 HDD I O Error 83 DP CL18 ...
Page 84: ...4 3 Print Quality 4 3 1 Blank Print 84 DP CL18 ...
Page 85: ...4 3 2 All black Print 85 DP CL18 ...
Page 86: ...4 3 3 Missing Primary Color 86 DP CL18 ...
Page 87: ...4 3 4 Light Print 87 DP CL18 ...
Page 88: ...4 3 5 Repeated spots or lines on print in line with each other 88 DP CL18 ...
Page 89: ...4 3 6 Dark Vertical Line in Print 89 DP CL18 ...
Page 90: ...4 3 7 White horizontal line or band in all the color of a print 90 DP CL18 ...
Page 91: ...4 3 8 Mis transfer missing portions of toner 91 DP CL18 ...
Page 92: ...4 3 9 Dirty Background 92 DP CL18 ...
Page 93: ...4 3 10 Partial Primary Color Dots 4 3 11 Dark Irregular Streaks in Print 93 DP CL18 ...
Page 94: ...4 3 12 Primary Color Irregular Streaks 94 DP CL18 ...
Page 95: ...4 3 13 Ghosting 95 DP CL18 ...
Page 96: ...4 3 14 Unfused or Partially Fused Printing 96 DP CL18 ...
Page 97: ...4 3 15 Image is skewed on the paper 97 DP CL18 ...
Page 98: ...4 3 16 Stains on Back of Print 98 DP CL18 ...
Page 99: ...4 3 17 No Printing on Edge of Print 99 DP CL18 ...
Page 100: ...4 3 18 Image is not centered on the print when it should be 100 DP CL18 ...
Page 101: ...4 4 Printer Error Call Service 4 4 1 Printer Error 10 101 DP CL18 ...
Page 102: ...4 4 2 Printer Error 11 102 DP CL18 ...
Page 103: ...4 4 3 Printer Error 20 103 DP CL18 ...
Page 104: ...4 4 4 Printer Error 24 104 DP CL18 ...
Page 105: ...4 4 5 Printer Error 35 105 DP CL18 ...
Page 106: ...4 4 6 Printer Error 36 106 DP CL18 ...
Page 107: ...4 4 7 Printer Error 37 and Printer Error 38 107 DP CL18 ...
Page 108: ...4 4 8 Printer Error 40 and Printer Error 43 108 DP CL18 ...
Page 109: ...4 4 9 Printer Error 41 109 DP CL18 ...
Page 110: ...4 4 10 Printer Error 45 110 DP CL18 ...
Page 111: ...4 4 11 Printer Error 46 111 DP CL18 ...
Page 112: ...4 4 12 Printer Error 47 112 DP CL18 ...
Page 113: ...4 4 13 Printer Error 48 113 DP CL18 ...
Page 114: ...4 4 14 Printer Error 50 114 DP CL18 ...
Page 115: ...4 4 15 Printer Error 53 115 DP CL18 ...
Page 116: ...4 4 16 Printer Error 54 116 DP CL18 ...
Page 117: ...4 4 17 Printer Error 56 117 DP CL18 ...
Page 118: ...4 4 18 Printer Error 65 118 DP CL18 ...
Page 119: ...4 4 19 Printer Error 66 119 DP CL18 ...
Page 120: ...4 4 20 Printer Error 70 120 DP CL18 ...
Page 121: ...4 4 21 Printer Error 72 121 DP CL18 ...
Page 122: ...4 4 22 Printer Error 73 122 DP CL18 ...
Page 123: ...4 4 23 Printer Error 80 123 DP CL18 ...
Page 124: ...4 4 24 Printer Error 81 124 DP CL18 ...
Page 125: ...4 4 25 Printer Error 82 125 DP CL18 ...
Page 126: ...4 4 26 Printer Error 83 126 DP CL18 ...
Page 127: ...4 4 27 Printer Error 84 127 DP CL18 ...
Page 128: ...4 4 28 Printer Error 90 128 DP CL18 ...
Page 129: ...4 4 29 Printer Error 91 Printer Error 92 and Printer Error 96 129 DP CL18 ...
Page 130: ...4 4 30 Printer Error 93 94 130 DP CL18 ...
Page 131: ...4 4 31 Printer Error 95 131 DP CL18 ...
Page 132: ...4 4 32 Printer Error 98 132 DP CL18 ...
Page 133: ...4 5 No Message 133 DP CL18 ...
Page 134: ...4 6 No Printing 4 6 1 Using Parallel Interface 134 DP CL18 ...
Page 135: ...4 6 2 Using USB Interface 135 DP CL18 ...
Page 136: ...4 6 3 Using Network Interface 136 DP CL18 ...
Page 137: ...4 6 4 No LCD Message 137 DP CL18 ...
Page 138: ...138 DP CL18 ...
Page 139: ...5 Schematic Diagram and Component Reference Guide 139 DP CL18 ...
Page 140: ...140 DP CL18 ...
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Page 184: ...6 Replacement Parts List 6 1 Printer Main Control Board 184 DP CL18 ...