Proface FP3900 - 19 Flat Panel" - Manual (Page 151)

FP3000 Series User Manual
9-6
9.3 Backlight Replacement
The backlight is a cold-cathode tube. Although the FP uses a long-life backlight, replacement may be required
earlier than expected depending on the environment where the FP is used. It is recommended that it be
replaced periodically.
The life span of the backlight is as follows:
(Time period until the backlight becomes half as bright as a new one) 50,000 hours (approx. 5.7 years)
When a burned-out backlight is detected, the status LED flashes alternately green and red, or a steady orange.
• FP-3900T series backlights cannot be replaced by customers. When you need to
replace the backlight of your FP-3900T, contact your local distributor.
To prevent an electric shock, be sure to turn the FP unit’s power OFF before replacing the
backlight.
The backlight and the FP itself will be very hot just after turning off the power. To avoid burning
your skin, be sure to wear gloves when replacing the backlight.
The backlight is very fragile. To avoid possible injury, do not directly touch the glass or pull the
cable.
• Normally, the FP unit detects a backlight burnout by monitoring the backlight's
current flow. However, the FP may fail to detect backlight burnout, or may only
detect it before the backlight burns out completely, depending on the type of
backlight problem.