HP Color LaserJet 8500 Service Manual - Page 380

Table 41. Numbered printer messages (continued) (54.2 CAROUSEL ERROR CYCLE POWER, continued) 8 Check electrical continuity between connector J642-1 (PYMC) and J642-2 (PBK) on the subrelay PCA when the door switch (SW673) is turned on. If there is no electrical continuity, replace the toner cartridge cover switch in the subrelay PCA. 9 Check electrical continuity between connector J642-1 (PYMC) and J648-1 (+24 VAR) on the main relay PCA when the door switch (SW642) is turned on. If there is no electrical continuity, replace the main relay PCA. 10 Measure the voltage across connector J648-1 (+24 VAR) and J648-3 (GND) on the main relay PCA after the printer is turned on. If the voltage is not 24 V, replace the main relay PCA. 11 Reconnect connectors J704 and J706 on the carousel motor PCA, and connector J220 on the controller board. 12 Reconnect connector J43 on the carousel position sensor, relay connector J42 and connector J207 on the controller board. 13 Measure the voltage across connector J220A6 (RLSROT) and J220-B5 (GND) on the controller board after the printer is turned on. If the voltage changes to about 3.5 V from 0 V, replace the carousel motor PCA. 14 Replace the carousel motor (M1). 15 Replace the controller board. 54.00.03 (event log message) See DUPLEX ERROR CHECK DUPLEXER in table 42 on page 397. 54.3 CALIBRATION WARNING PRESS Event log message: 54.00.03 GO TO CONTINUE Description: The process marks in the density sensing pattern are corrupted (see chapter 5 for more information). Action: 1 Press GO. 2 Print a configuration page and troubleshoot as an image-quality problem. 3 Check the transfer guide for cracks and replace the transfer guide as needed. 378 Chapter 7 - Troubleshooting EN