Figure 116. Connectors on registration roller assembly . . . . . . 265 Figure 117. Density sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . 266 Figure 118. Paper pick-up assembly . . . . . . . . . . . . . . . . . . . . . 267 Figure 119. Tray 1 pick-up assembly (1 of 2) . . . . . . . . . . . . . . 268 Figure 120. Tray 1 pick-up assembly (2 of 2) . . . . . . . . . . . . . . 269 Figure 121. Rear of printer with cover removed . . . . . . . . . . . . 270 Figure 122. Rear of printer with formatter pan removed . . . . . . 271 Figure 123. Formatter pan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 272 Figure 124. Formatter pan (left side) . . . . . . . . . . . . . . . . . .
. . . 273 Figure 125. Fan 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 274 Figure 126. Fan 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 275 Figure 127. Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 276 Figure 128. Controller board, HP Color LaserJet 8550 MFP printer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 277 Figure 129. Controller board, HP Color LaserJet 8500 printer . 278 Figure 130. ECO board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 279 Figure 131. Cartridge motor. . . . . . . . . . . . . . . . . . . . . . . . . . . . 280 Figure 132. Main motor . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . 281 Figure 133. Carousel motor PCA. . . . . . . . . . . . . . . . . . . . . . . . 282 Figure 134. Fans 1 and 2 housing assemblies . . . . . . . . . . . . . 283 Figure 135. Carousel motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . 284 Figure 136. Lower air duct . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 285 Figure 137. Screws on the delivery drive assembly . . . . . . . . . 286 Figure 138. Access to main gear assembly. . . . . . . . . . . . . . . . 287 Figure 139. Developer/imaging drum bias supply, HP Color LaserJet 8550 printer . . . . . . . . . . . . . . . 288 Figure 140. Developer/imaging drum bias supply . . . . . . . . .
. . 289 Figure 141. Post charger HV module . . . . . . . . . . . . . . . . . . . . 290 Figure 142. High-voltage power supply . . . . . . . . . . . . . . . . . . . 291 Figure 143. Cleaning roller HV module . . . . . . . . . . . . . . . . . . . 292 Figure 144. Main relay PCA. . . . . . . . . . . . . . . . . . . . . . . . . . . . 293 Figure 145. Drum/cartridge drive assembly. . . . . . . . . . . . . . . . 294 Figure 146. Separation discharge high-voltage converter . . . . . 295 Figure 147. Plate over media size sensing PCAs . . . . . . . . . . . 296 Figure 148. Media size sensing PCAs. . . . . . . . . . . . . . . . . . . . 297 Figure 149. Front cover of the 2,000-sheet input unit . . . . . . .
. 299 Figure 150. Back cover removal . . . . . . . . . . . . . . . . . . . . . . . . 300 Figure 151. Left cover removal . . . . . . . . . . . . . . . . . . . . . . . . . 301 Figure 152. Vertical transfer unit . . . . . . . . . . . . . . . . . . . . . . . . 302 Figure 153. Right cover with VTU removed. . . . . . . . . . . . . . . . 304 Figure 154. Tray 4 removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . 305 Figure 155. Paper pick-up assembly . . . . . . . . . . . . . . . . . . . . . 306 Figure 156. Controller PCA . . . . . . . . . . . . . . . . . . . . . . . . . . . . 307 Figure 157. Screw on front LED PCA assembly . . . . . . . . . . . . 308 10 List of Figures EN