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3.5.5. Accumulator Drive Circuit
This circuit consists of 2 solenoid drive circuits (accumulator cam switching solenoid, Mono/Color Changer solenoid), accumulator
belt position detection (circuit consist of the accumulator cam home position sensor) and solenoid drive short detection circuit. The
accumulator cam switching solenoid, Mono/Color changer solenoid and accumulator cam home position sensor are located on the
accumulator tension unit. The accumulator cam switching solenoid is used for controlling STR bias roller position, FTR bias roller
position and accumulator belt tension. The Mono/Color changer solenoid is used for selecting the FTR bias rollers. At the
monochrome printing mode, the signal MONOSOL (pin 169 of IC14) is a low and the Mono/Color changer solenoid is not active.
At the color printing mode, the signal MONOSOL becomes a high, turning on the Mono/Color changer solenoid. As a result, the
FTR rollers for black, cyan, magenta and yellow are activated by the mechanism (linked the Mono/Color changer solenoid
operation) in the accumulator tension unit. The short detection circuit is for detecting whether the solenoid drive circuit is shorted
or not. If this circuit is shorted, the signal NFAILDR (pin173 of IC14) becomes a low level. IC14 receives this signal, and detects
that the solenoid drive circuits for the accumulator cam switching and mono/color changer solenoids are shorted. The error
message “Printer Error 47" is displayed on the LCD display.
There are 4 status positions for the accumulator tension unit for controlling the printing process.
·
Home Position
·
Accumulator Belt Cleaning Position :
The cleaning of the accumulator belt is done.
·
Toner Transferring Position :
The FTR bias roller(s) is (are) contacted with the accumulator belt for transferring the toner to the accumulator belt.
·
FTR Roller Release Position :
The FTR bias roller(s) is (are) released from the accumulator belt.
The following Figure-1 indicates the home position status of the accumulator tension unit. When the accumulator tension unit is at
the home position, the hook of cam ratchet is engaged with the Detent (A). The accumulator cam home position sensor tab
intersects into the accumulator cam home position sensor as shown in the Figure-1.
Shifting from Home Position to Accumulator Belt Cleaning Position :
When the printing process is started, the signal ITSOL (pin 168 of IC14) becomes a high for the proper time set by the software
programing, turning on the accumulator cam switching solenoid. As a result, the accumulator cam switching solenoid is energized,
releasing the hook of cam ratchet from the Detent (A) on the cam ratchet. After this, the cam ratchet wheel rotates in the arrow (1)
by the rotation from the BK motor. After the proper time, the signal ITSOL is changed from the high to the low, turning of the
accumulator cam switching solenoid. And, the hook of cam ratchet engages with the Detent (B). When the hook of cam ratchet
engages with the Detent (B), the rotation of cam ratchet wheel is stopped by the mechanical clutch device in the accumulator
tension unit. The accumulator Belt Cleaning Position status indicates this status. While shifting from the home position to
accumulator belt cleaning position, the accumulator belt is taken up the slack in the accumulator belt by the mechanism (linked the
cam ratchet wheel operation) in the accumulator tension unit. Besides, the sensor tab also rotates in the arrow (2) direction and the
signal ITHOME1 (pin 183 of IC14) changes from the high to the low. If the signal ITHOME1 does not change within the time set
by software programing, the error message “Printer Error 24” is displayed on the LCD display. At the accumulator belt cleaning
position, the sensor tab is located as shown in the Figure-2.
Shifting from Accumulator Belt Cleaning Position to Toner Transferring Position :
After cleaning the accumulator belt at the accumulator belt cleaning position, the signal ITSOL (pin 168 of IC14) becomes a high
for the proper time set by the software programing, turning on the accumulator cam switching solenoid. After this, the accumulator
tension unit shifts to the Toner Transferring Position in the same manner as the above “Shifting from Home Position to accumulator
Belt Cleaning Position”. While shifting to “Toner Transferring Position”, the first transfer roller (FTR) and second transfer roller
(STR) are contacted with the accumulator belt by the mechanism (linked the cam ratchet wheel operation) in the accumulator
tension unit. At the Toner Transferring Position, the sensor tab is located as shown in the Figure-2. If the signal ITHOME1 does not
change within the proper time while this shifting, the error message “Printer Error 24” is displayed on the LCD display.
After transferring the toner for the last page to the accumulator belt, the signal ITSOL changes the high to the low and the status
of the accumulator tension unit is shifted to “FTR Roller Release Position”.
Shifting from Toner Transferring Position to FTR Roller Release Position :
The status of accumulator tension unit is shifted to the FTR Roller Release Position in the same manner as the above “Shifting from
26
DP-CL18
Summary of Contents for Workio DP-CL18
Page 8: ...1 2 15 LCD Board Marked PbF 8 DP CL18 ...
Page 12: ...DP CL18 12 ...
Page 21: ...21 DP CL18 ...
Page 23: ...23 DP CL18 ...
Page 28: ...28 DP CL18 ...
Page 30: ...30 DP CL18 ...
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 ...
Page 172: ...DP CL18 172 ...
Page 184: ...6 Replacement Parts List 6 1 Printer Main Control Board 184 DP CL18 ...