Installation Manual Part 6

FCC 10: CDG-ARTU EXHIBIT C

MAGNASTAR C-2000 DIGITAL AIRBORNE TELEPHONE SYSTEM

9.1.5 ARTU MOUNTING TRAY FAN TEST

Under normal operational conditions, the ARTU Mounting Tray Fan is activated by a switch in the ARTU

which is under software control. The ARTU monitors a temperature sensor located in the ARTU and is

programmed to turn on the Fan when the temperature is at approximately room temperature. The ARTU

Mounting Tray Fan test will command the ARTU to turn the fan "ON" to check operation.

Symptom: The ARTU Mounting Tray Fan is not operational.

If the ARTU Mounting Tray Fan is not operational, the problem can be caused by the ARTU,

wiring to the ARTU Mounting Tray or the Mounting Tray Fan itself. Several steps wi)] be

required to detennine the cause of failure. These steps may also vary depending on which

assembly of the ARTU mounting Tray assembly that is used in the aircraft.

For -801 Tra~: Remove power from system Remove the power connector from ARTU J2

connector interface and ground pin P I-F of the ARTU Power cable. Apply power to the system.

If the fan operates, perform a continuity check on the ARTU Tray - ARTU Power cable interface.

If the wiring is correct, replace the ARTU. If the fan does not operate, replace the ARTU

Mounting Tray.

For -802 Trax: Remove the PI connector from the ARTU Mounting Tray. With power removed,

grotmd pin Jl-9 on the ARTU Tray. Apply power to the system. If the fan does not operate,

replace the ARTU Mounting Tray. If the fan operates, perform a continuity check on the 802

ARTU Tray - ARTU Power cable. If the wiring is correct, replace the ARTU. Ifnot replace

cable.

V4.0A 8'l' Radio Response.

C-2000 report8 engineering teat FAN CONTROL performed

+ +

+ VlA MNT Tutorial +

:IRS1A101 :

: SYJI4>tca: Pen do.. DOt operate. :

: por -801 Tray: ~e power from syst_. R~ J2 connector fr.. ARTU end :

: ground pin Pl-P of the ARTU Power cable. Apply ~r to the ayst_. If :

: the fen operate8. replace the ARTU. If the fan does not operate. replace:

: the ARTU Mounting Tray. :

: For -802 Tray: a..ove the Pl connector from the ARTU Mounting Tray. with :

: power r~ed. gr~ pin Jl-' on the ARTU Tray. Apply power to the :

: syst_. If the fen ~ DOt operate. replace the ARTU Mounting Tray. If :

: the fan operatH. perfora . continuity on the 802 ARTU Tray - ARTU :

: Power cable. If the continuity is correct. replace the ARTU. If not :

: replace cable. :

Figure 9.1.5. ARTU Mounting Tray Fan MMTI Troubleshoot Scret

9-6 RevB