Power On It is important to have the printer's Control Panel functional as soon as possible in the troubleshooting process so that the printer's diagnostics can assist in locating printer errors. Table 7-3. Power On Defects or Blank Display Problem Action 1. Is AC power available at the printer's power receptacle? Verify. See table 1-6, “Electrical Specifications,” on page 9. 2. Is the printer's on/off switch set to on? Push the switch to the on position. 3. Are the printer's fans on? Note: Fan operation is significant since all fans are controlled by the printer's DC Controller PCA. When the printer is in power save mode, the fans are off.
Make sure that the printer is not in power save mode. Press G O . Operational fans indicate: (See figure 7-3 on page 389 to locate the fans.) 1. AC power is present in the printer. 2. DC power supply is functional (both 24V DC and 5V DC are being generated). 3. DC Controller PCA's micro-processor is functional. NO If the fans are NOT working, turn off the printer and remove the printer's Formatter PCA. Disconnect all the printer's paper handling options. Then turn on the printer and check the fans again. If the fans are still not working, perform the following steps: 1. Verify that all fans are connected to the DC Controller PCA according to figure 7-22 on page 497. 2.
Replace the low-voltage DC power supply. See “Low Voltage Power Supply (LVPS)” on page 216 for instructions. 3. Replace the DC Controller PCA. See “PCA, DC Controller” on page 207 for instructions. C4085-91087 Power On 387