System Maintenance Manual

G1000/GFC700 System Maintenance Manual – C90A/C90GT/C90GTi King Air Page 8-7
190-00682-01 Revision F
8.1.6 G1000 Backup Path Test
1. Remove power from the displays by pulling the following circuit breakers:
a. PFD1 PRI
b. PFD1 SEC
c. PFD2
d. MFD
2. Individually power the PFD1, PFD2 and MFD by resetting the appropriate circuit breaker while
holding the ENT key on each display (far right key on MFD) until the words INITIALIZING
SYSTEM appear.
3. In configuration mode, go to the GDU Page Group on PFD1.
4. On PFD1, activate the cursor and select PFD1 in the SELECT UNIT field and press ENT.
5. Observe the GRS 77 and GDC 74 DATA indicators in the ARINC 429 window.
6. Verify both indicators are valid (GREEN √ ), indicating the channels are receiving data as shown
below:
NOTE
Reference Table 3-1 for interpretation of data indicator symbols
Figure 8-1. GDU Data Verification (ARINC 429)
7. On PFD1, activate the cursor and select PFD2 in the SELECT UNIT field and press the ENT key.
8. Repeat Steps 4 and 5.
9. On PFD1, activate the cursor and select MFD1 in the SELECT UNIT field and press the ENT
key.
10. Repeat Steps 4 and 5.