6-12 Phaser 8400/8500/8550 Color Printer
Disabling Jet Substitution Mode (8400)
After the printhead is replaced, disable Jet Substitution Mode to restore normal
operation. Using the hidden Jet Substitution Mode Menu, select Jet Select.
1. On the Control Panel, select Troubleshooting, and then press the OK button.
2. Select Print Quality Problems, and then press the OK button.
3. Press and hold the Up Arrow button, and then press the Back button.
4. Select Turn Jet Substitution Mode Off, and then press the OK button.
5. Print the Eliminate Light Stripes test page to verify that Service Mode is disabled
for all jets.
Disabling Jet Substitution Mode (8500/8550)
After the printhead is replaced, disable Jet Substitution Mode to restore normal
operation. To deselect Jet Substitution Mode:
1. On the Control Panel, scroll to Troubleshooting, then press the OK button.
2. Select Print Quality Problems, and then press the OK button.
3. Select Eliminate Light Stripes, and then press the OK button.
4. Select Turn Jet Substitution Mode Off, and then press the OK button.
5. Print the Eliminate Light Stripes test page to verify that Service Mode is disabled
for all jets.
Resetting NVRAM
Resetting NVRAM returns all the Image Processor Board NVRAM-stored
parameters to their factory default values. The print counts and the Adobe firmware
serial number are not affected by this reset. You can reset the PostScript NVRAM
using the Service Tools Menu or the Service Diagnostics Menu.
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