HP LaserJet Pro 400 Service Manual - Page 25

Figure 2-5 Rollers ...124 Figure 2-6 PCAs ...125 Figure 2-7 Optional 250-sheet cassette 126 Figure 2-8 Timing diagram ...127 Figure 2-9 Circuit diagram ...128 Figure 2-10 CPU diagram ...129 Figure 2-11 ASIC diagram ...130 Figure 2-12 HVT/Toner EMP diagram 131 Figure 2-13 Driver PCA diagram ...132 Figure 2-14 Duplexer PCA diagram ...133 Figure 2-15 FSR diagram ...134 Figure 2-16 Control-panel test ...175 Figure 2-17 Control-panel test ...211 Figure 3-1 Scanner and document feeder main assemblies 250 Figure 3-2 External panels and covers 252 Figure 3-3 Internal assemblies (1 of 7 254 Figure 3-4 Internal assemblies (2 of 2 256 Figure 3-5 Internal assemblies (3 of 7 258 Figure 3-6 Internal assemblies (4 of 7 260 Figure 3-7 Internal assemblies (5 of 7 262 Figure 3-8 Internal assemblies (simplex models 264 Figure 3-9 Internal assemblies (duplex models 266 Figure 3-10 PCAs ...268 Figure 3-11 250-sheet paper feeder (optional Tray 3 270 ENWW xxiii