40  S-Class 
4.4 Maintenance  
 
Routine maintenance will ensure the optimum performance of the printer. 
The following table outlines the recommended cleaning intervals, while 
the items listed below will help do the job safely and effectively: 
 
• Isopropyl alcohol
  • Soft-bristled brush 
• Cotton swabs  • Soapy water/mild detergent 
•  A clean, lint-free cloth  • Compressed air 
 
 
 
CAUTION 
For your continued safety and to avoid damaging the unit, always 
turn ‘Off’ and unplug the printer before servicing. 
 
Isopropyl alcohol is a flammable liquid; always take the proper 
precautions when using this solvent. 
  
Recommended Cleaning Schedule 
Area  Method  Interval 
 
Printhead 
 
A cotton swab dampened with isopropyl alcohol, 
wiped across the printhead until all build-up is 
removed. See Section 4.4.1. 
 
After each 
roll or box 
of tickets. 
 
 
Platen  
Roller 
 
A cotton swab dampened with isopropyl alcohol 
wiped across the platen roller. Rotate the roller by 
hand and repeat to clean entire surface. See 
Section 4.4.2. 
 
 
After each 
roll or box 
of tickets. 
 
 
Media  
Sensor  
 
A brush or compressed air (and isopropyl alcohol, 
if necessary) to remove all dust build-up. See 
Section 4.4.3.
 
 
Monthly 
or as 
needed. 
 
 
Ticket Detect 
Sensor 
 
Compressed air to remove all dust build-up. See 
Section 4.4.4. 
 
 
As needed. 
 
 
Ticket  
Path 
 
A brush or compressed air to remove all build-up 
along the paper path.  
 
 
As needed. 
 
 
Interior 
(ST Models 
only)
 
 
A brush or compressed air to remove all build-up 
in the ticket compartment. See Section 4.4.5. 
 
 
As needed. 
 
 
Exterior 
 
A soft cloth dampened with a mild detergent to 
remove all build-up. See Section 4.4.6. 
 
 
As needed. 
 
 
Cutter 
(optional 
equipment) 
 
A brush or compressed air to remove all build-up. 
 
 
 
 
 
As needed.