I-View FAC – 500 FingerKey Access Controller DVR - Manual (Page 102)

101
Chapter 7 Trouble Shooting
1. Cleaning
From time to time, the optical platen, the keypad and display window require cleaning. Since
working environments differ, it is not possible to define when cleaning should be performed.
Following is guide:
Figure 0-1 Cleaning Schedule
Item Cleaning Frequency
Keypad and display
window
Cleaning when visibly dirty and hard to read. See cleaning
the keypad and display below.
Do not over clean. The platen is designed to work under
greasy or dirty conditions.
Optical platen
However, do clean if the platen is obstructed or people are
reporting deteriorating performance. See cleaning the Optical
Platen below.
2. Cleaning the Keypad and Display
To clean the keypad and display, use the same cleaning products as for the platen, and wipe
dry.
3. Cleaning the Optical Platen
Clean the optical platen as follows:
(1) If dusty or gritty, first blow on the platen to clean off any loose particles.
(2) Spray on a light coating of a window cleaning product or other similar neutral detergent.
Warning: Do not use any other cleaner or the platen may become damaged.
(3) Using a non-abrasive and lintine, pat dry. Be careful not to scratch the platen. If lint
particles adhere to the platen surface, below them off when the platen is dry