HP 2820 Service Manual - Page 431

face-up output door. See rear output door factory defaults, restoring 318 faded print 265 fans diagrams 79 error messages 255 removing 223 fax billing (metering) tone filters 110 data path 109 device location, resetting 303 downstream current detection 109 error codes 308 error messages 246, 249 flash memory storage 111 hook state 109 hook switch control 109 jams, troubleshooting 289 line current control 110 modem, models including 2 operations 107 page storage 110 receiving, troubleshooting 285, 308 reports, printing 307 reports, troubleshooting 290 ring detect 110 safety isolation 108 safety protection circuitry 108 sending, troubleshooting 287, 312 specifications 21 Fax Settings tab, HP Toolbox 57 Fax tab, HP Toolbox 54 fax-quality test 117 FCC requirements 33 features 2, 4 feed system engine control system 76 operations 81 feed system, paper ADF operations 105 feed-drive shaft, removing 205 feeding problems, troubleshooting 273 Finnish laser statement 39 firmware code recovering or updating 330 Fit to Page error message 248 flash memory, fax 111 flatbed scanner cleaning 64 loading 50 fonts, included 4 form sensor, ADF 106 formatter fax subsystem 108 part numbers 335 removing 182 formatter cage, removing 180 fraud hotline 70 front frame assembly, diagrams and part numbers 350 fuser control circuit 76 diagram 91 diagrams and part numbers 376 error messages 253 life expectancy 62 operations 98 replacing 133 wrap sensor, removing 219 fuser motor diagrams 81 removing 222 fusing delivery paper sensor (PS1) 81, 84 G gear assembly, replacing 192 gear-train motor (DCM701) 83 glass, cleaning 64 glossy paper 25 gray background, troubleshooting 266 grayscale printing, troubleshooting 271 H half self-test 296 heating element test 296 heavy media 23, 25 help, drivers 15 high-voltage power supply locating 76 removing 226 hook state 109 hook switch control 110 HP Customer Care Online 334 HP Document Viewer 17 HP fraud hotline 70 HP Image Zone 17 HP Technical Training 334 HP Toolbox Copy Settings tab 57 Device Settings 56 Documentation tab 55 Fax Settings tab 57 Fax tab 54 HP Toolbox links 58 Network Settings tab 57 opening 53 operating systems supported 13 Other links 58 Print Settings tab 57 Scan to tab 55 Status tab 54 System Settings tab 56 Troubleshooting tab 55 humidity specifications device environment 20 paper, storing 26 I I/O cover, removing 158 IBM OS/2 support 13 IC CS-03 requirements 34 image formation developing stage 95 engine control system 76 fusing stage 98 laser beam operations 94 primary charging stage 94 separation stage 97 stages 93 system components 91 transfer stage 96 image quality cleaning page, printing 65 copy, troubleshooting 280 print, troubleshooting 263, 264 scans, troubleshooting 276, 277 specifications 4 Image Zone 17 ENWW Index 419