41
Backlight
Up from Version 4.05 the ALPHA has an EL-backlight illumination. This backlight uses a
separate power connector. The connecting voltage is 12 VDC. Power consumption is at
70 mA. The backlight should be connected to any night light switch of the plane.
Attention
Don’t switch on the backlight during day light flights with ambient
temperatures higher than 30 °C. The backlight may heat up the
instrument under high day light temperatures and reduces the display
contrast.
Under winter temperatures below zero degrees the backlight is helpful
for avoiding any display delay which is normal at all LCD in subfreezing
conditions
12 Warranty
BRÄUNIGER
offers a 24 month international warranty on material and workmanship
on all
ALPHA
MFD
from the date of purchase. In case of repair please send
instrument directly to
BRÄUNIGER
or to the nearest
BRÄUNIGER
Service Centre.
NOTES:
High Voltage protection for
ALPHA
ALPHA
ALPHA
ALPHA
MFD
To avoid damages by high voltage causing by defective voltage regulators the Alpha-
MFD has since 2002 an integrated voltage protection circuit.
In case of a defect voltage regulator the external fuse will fail and the
ALPHA
MFD
is
supplied by the 9 volt back-up battery
–
battery display is blinking now.
After repair, please replace the defect fuse ( 150 … 200 mA )
