Specifications

Technician’s Guide 2-43
2.4 ADJUSTMENTS AND MAINTENANCE
Section 2.4 describes adjustment and maintenance procedures for the PA/4000. If you
need an adjustment or maintenance procedure for a component not covered in this
section, call Diagraph Service at 1-800-526-2531.
2.4.1 PRINTHEAD
WARNING: Turn OFF the PA/4000 and unplug the unit from the outlet before
cleaning the Printhead.
The Printhead can become dirty from normal operation. Clean the printhead
(approx. every 2000 inches dependent on media material) for optimum print
quality. Use a cotton swab and Isopropyl Alcohol to clean the printhead.
Internal/External Cleaning
WARNING: Turn OFF the PA/4000 and unplug the unit from the outlet before
cleaning any part on the PA/4000.
Clean all rollers, guides and assemblies regularly. Isopropyl Alcohol can be used to
clean these areas. Regular cleaning will keep all items free from residue.
Clean the exterior of the PA/4000 using a soft damp (not wet) cloth. A mild detergent
may be used to remove heavier stains. Do not use abrasive cleaners.
Lubrication
All bearings in the PA/4000 are either permanently lubricated or made of smooth
plastic, therefore lubrication is not necessary. The slip clutches in the PA/4000 are pre-
lubricated and should not require further lubrication. However, if one of these clutches
were to dry out, squeaking or humming could result. If this occurs, lubricate the clutch
as follows:
Ribbon Supply Clutch
Open the Electrical Box Assembly. Remove the clutch spring and apply a small amount
of IBM#23 grease into the groove on the pulley. Replace spring and cover.
Ribbon Rewind Clutch
Locate and loosen the set screw on the outside collar. Remove the collar and hub
assembly off of axle. Apply 10-12 drops of quality SAE 5 machine oil to the (2) felt