HP 2420 Service Manual - Page 14

Timing diagram, HP LaserJet 2400 series, Main assemblies - pickup roller assembly

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Page 14 highlights

Figure 6-28. Figure 6-29. Figure 6-30. Figure 6-31. Figure 6-32. Figure 6-33. Figure 6-34. Figure 6-35. Figure 6-36. Figure 6-37. Figure 6-38. Figure 6-39. Figure 6-40. Figure 6-41. Figure 6-42. Figure 6-43. Figure 6-44. Figure 6-45. Figure 6-46. Figure 6-47. Figure 6-48. Figure 6-49. Figure 6-50. Figure 6-51. Figure 6-52. Figure 6-53. Figure 6-54. Figure 6-55. Figure 6-56. Figure 6-57. Figure 6-58. Figure 6-59. Figure 6-60. Figure 6-61. Figure 7-1. Figure 7-2. Figure 7-3. Figure 7-4. Figure 7-5. Figure 7-6. Figure 7-7. Figure 7-8. Figure 7-9. Figure 7-10. Figure 7-11. Figure 7-12. Figure 7-13. Figure 7-14. Figure 7-15. Figure 8-1. Figure 8-2. Figure 8-3. Figure 8-4. Figure 8-5. Figure 8-6. Removing the right-side handle (2 of 2 107 Removing the ECU (1 of 6 108 Removing the ECU (2 of 6 109 Removing the ECU (3 of 6 110 Removing the ECU (4 of 6 111 Removing the ECU (5 of 6 112 Removing the ECU (6 of 6 113 Removing the access plate 114 Removing the power supply (1 of 5 115 Removing the power supply (2 of 5 116 Removing the power supply (3 of 5 117 Removing the power supply (4 of 5 118 Removing the power supply (5 of 5 119 Removing the gear assembly (1 of 6 120 Removing the gear assembly (2 of 6 121 Removing the gear assembly (3 of 6 122 Reinstalling the gear assembly 123 Removing the tray 1 solenoid 124 Removing the tray 2 solenoid 125 Removing the e-label reader (1 of 2 126 Removing the e-label reader (2 of 2 127 Removing the face-down-roller shaft (1 of 2 128 Removing the face-down-roller shaft (2 of 2 129 Removing the cartridge door (1 of 3 130 Removing the cartridge door (2 of 3 131 Removing the cartridge door (3 of 3 132 Removing the transfer roller 133 Removing the registration assembly (1 of 3 134 Removing the registration assembly (2 of 3 135 Removing the registration assembly (3 of 3 136 Removing the tray 1 pickup roller 137 Removing the tray 2 pickup roller (1 of 2 138 Removing the tray 2 pickup roller (2 of 2 139 Removing the separation pad 140 Basic troubleshooting 143 Sample menu map page 151 Sample configuration page 152 Supplies status page 153 Jetdirect page 168 Main assemblies, HP LaserJet 2400 series 222 Main parts, HP LaserJet 2400 series 223 Sensors and switches, HP LaserJet 2400 series 224 Motors, fans, and solenoids, HP LaserJet 2400 series 225 PCAs, HP LaserJet 2400 series 226 500-Sheet paper feeder, HP LaserJet 2400 series 227 Circuit diagram (1 of 2 228 Circuit diagram (2 of 2 229 ECU wiring...230 Timing diagram, HP LaserJet 2400 series 231 Covers...238 Internal components (1 of 4 240 Internal components (2 of 4 244 Internal components (3 of 4 248 Internal components (4 of 4 250 Tray 2 pickup assembly 254 xii ENWW

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Figure 6-28.
Removing the right-side handle (2 of 2)
.........................................................
107
Figure 6-29.
Removing the ECU (1 of 6)
............................................................................
108
Figure 6-30.
Removing the ECU (2 of 6)
............................................................................
109
Figure 6-31.
Removing the ECU (3 of 6)
............................................................................
110
Figure 6-32.
Removing the ECU (4 of 6)
............................................................................
111
Figure 6-33.
Removing the ECU (5 of 6)
............................................................................
112
Figure 6-34.
Removing the ECU (6 of 6)
............................................................................
113
Figure 6-35.
Removing the access plate
............................................................................
114
Figure 6-36.
Removing the power supply (1 of 5)
..............................................................
115
Figure 6-37.
Removing the power supply (2 of 5)
..............................................................
116
Figure 6-38.
Removing the power supply (3 of 5)
..............................................................
117
Figure 6-39.
Removing the power supply (4 of 5)
..............................................................
118
Figure 6-40.
Removing the power supply (5 of 5)
..............................................................
119
Figure 6-41.
Removing the gear assembly (1 of 6)
............................................................
120
Figure 6-42.
Removing the gear assembly (2 of 6)
............................................................
121
Figure 6-43.
Removing the gear assembly (3 of 6)
............................................................
122
Figure 6-44.
Reinstalling the gear assembly
......................................................................
123
Figure 6-45.
Removing the tray 1 solenoid
........................................................................
124
Figure 6-46.
Removing the tray 2 solenoid
........................................................................
125
Figure 6-47.
Removing the e-label reader (1 of 2)
.............................................................
126
Figure 6-48.
Removing the e-label reader (2 of 2)
.............................................................
127
Figure 6-49.
Removing the face-down-roller shaft (1 of 2)
.................................................
128
Figure 6-50.
Removing the face-down-roller shaft (2 of 2)
.................................................
129
Figure 6-51.
Removing the cartridge door (1 of 3)
.............................................................
130
Figure 6-52.
Removing the cartridge door (2 of 3)
.............................................................
131
Figure 6-53.
Removing the cartridge door (3 of 3)
.............................................................
132
Figure 6-54.
Removing the transfer roller
...........................................................................
133
Figure 6-55.
Removing the registration assembly (1 of 3)
.................................................
134
Figure 6-56.
Removing the registration assembly (2 of 3)
.................................................
135
Figure 6-57.
Removing the registration assembly (3 of 3)
.................................................
136
Figure 6-58.
Removing the tray 1 pickup roller
..................................................................
137
Figure 6-59.
Removing the tray 2 pickup roller (1 of 2)
......................................................
138
Figure 6-60.
Removing the tray 2 pickup roller (2 of 2)
......................................................
139
Figure 6-61.
Removing the separation pad
........................................................................
140
Figure 7-1.
Basic troubleshooting
.....................................................................................
143
Figure 7-2.
Sample menu map page
................................................................................
151
Figure 7-3.
Sample configuration page
............................................................................
152
Figure 7-4.
Supplies status page
......................................................................................
153
Figure 7-5.
Jetdirect page
.................................................................................................
168
Figure 7-6.
Main assemblies, HP LaserJet 2400 series
...................................................
222
Figure 7-7.
Main parts, HP LaserJet 2400 series
.............................................................
223
Figure 7-8.
Sensors and switches, HP LaserJet 2400 series
..........................................
224
Figure 7-9.
Motors, fans, and solenoids, HP LaserJet 2400 series
.................................
225
Figure 7-10.
PCAs, HP LaserJet 2400 series
....................................................................
226
Figure 7-11.
500-Sheet paper feeder, HP LaserJet 2400 series
.......................................
227
Figure 7-12.
Circuit diagram (1 of 2)
...................................................................................
228
Figure 7-13.
Circuit diagram (2 of 2)
...................................................................................
229
Figure 7-14.
ECU wiring
.....................................................................................................
230
Figure 7-15.
Timing diagram, HP LaserJet 2400 series
.....................................................
231
Figure 8-1.
Covers
............................................................................................................
238
Figure 8-2.
Internal components (1 of 4)
..........................................................................
240
Figure 8-3.
Internal components (2 of 4)
..........................................................................
244
Figure 8-4.
Internal components (3 of 4)
..........................................................................
248
Figure 8-5.
Internal components (4 of 4)
..........................................................................
250
Figure 8-6.
Tray 2 pickup assembly
.................................................................................
254
xii
ENWW