Northern Airborne Technology LD08 - Manual (Page 13)

SM15 Rev. 4.00 LD08 Lamp Dimmer Manual
Nov 21, 2003 Page 2-3
ENG-FORM: 805-0104.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
An optional external SPST toggle switch can be used to route an external voltage to the
lamps if the dimmer should fail.
2.5 Post-Installation Checks
2.5.1 Voltage/resistance checks
Disconnect the LD08 from its mating connector. Check pin 1 for 28 Vdc and pin 17 for
ground. Ensure that the lamp connections are correct, as mis-wiring may cause a
permanent failure of the LD08.
Ensure that no short circuits exist on any lamp line (lamp hi to lamp lo), and that no
press-to test lamp holders have been used. These cause one of the lamp lines to be
shorted to ground, which may damage the internal circuitry of the LD08.
2.5.2 System
Checks
Install the LD08 and power up the ship’s systems. Ensure that operation is correct (DIM
LEVEL trimpot or switch), and that all lamps are fully functional. The system cannot be
accepted for service until all annunciations and lamp test/dim operations are correct.
Adjust the DIM LEVEL position to a nominal 14 Vdc, or to suit the pilot's preference.
2.6 Continued Airworthiness
Maintenance of the LD08 is ‘on condition’ only. Periodic maintenance of this product is
not required.
2.7 Installation Drawings
DRAWING REV. DESCRIPTION TYPE
LD08\001\903-0 1.00 LD08 Dimmer 3-D
LD08\001\403-0 1.01 Lamp Dimmer- Internal Dimming Interconnect
LD08\001\403-1 1.01 Lamp Dimmer - External Dimming Interconnect
LD08\001\403-2 1.01 Lamp Dimmer with RS08 - External Dimming Interconnect
LD08\001\405-0 1.01 Lamp Dimmer Connector Map
LD08\001\922-0 1.00 Lamp Dimmer Mech. Installation
Section 2.0 ends after these Drawings