HP Latex 3000 Printer - Manual (Page 210)

2. Clean the platen area around the sensor thoroughly with a clean cloth dampened with isopropyl alcohol.
NOTE: If you are in an area (such as California) that regulates VOC cleaning and maintenance fluids,
instead of isopropyl alcohol use a VOC-certified cleaner such as a properly diluted Simple Green All-
Purpose Cleaner.
3. Wipe the sensor window with one of the cotton swabs provided in the Printer Cleaning Kit, slightly
dampened (not soaked) with isopropyl alcohol, to remove dried ink. If the sensor window is heavily
coated with dry ink, you may need to apply some pressure while wiping, helping the cotton to absorb
the ink.
4. Continue cleaning with fresh swabs until the cotton stays clean and the sensor window looks clean.
TIP: When reflecting ambient light, a clean sensor window shows a blue-colored reflection that
should extend uniformly across its whole surface. You can see this reflection by moving closer and
slightly changing your angle of view.
Finish off cleaning the substrate-advance sensor
1. Wait 3 or 4 minutes, so that the alcohol can evaporate completely.
2. Close the front door.
3. Ensure that all windows, covers, and doors are closed and remain in their original position.
4. Move the carriage beam back to its normal position (this takes about 2 minutes).
5. Run a diagnostic test to check that the sensor is now working correctly.
204 Chapter 8 Hardware maintenance ENWW