Fault Isolation - GOODRICH Stormscope Series II Installation Manual

The buttons perform the following operations in this mode:
•
EXIT - returns to the Service Menu (figure 4-1).
•
NOISE MON - returns to the Noise Monitor display (figure 4-7).
•
Softkeys (B) and (C) are not used.
The test strike screen verifies the processing and plotting of electrical discharge data. A strike indication
("+") should appear inside the displayed box each second.
PASS - A strike indication is displayed and cleared each second (1 Hz rate), so that it appears to
flash. The strike symbol should appear inside the box.
FAIL - If the generated strike indications appear outside of the box, or do not appear at all.
OCCASIONAL strikes appearing outside the box or, that do not appear at
all, should not be interpreted as failing the test.
Switch back and forth between the Test Strikes and Noise Monitor displays to check for accurate plotting of
the internally generated test strikes and for electrical noise that could interfere with weather mapping.
(Trouble-shooting electrical noise is discussed in paragraph 4.5.)
The system must pass both the Noise Monitor and Test Strike criteria to
ensure proper operation.

4.5 FAULT ISOLATION

Most problems associated with the WX-950 will cause the unit to display error messages. Table 4-1 lists the
WX-950 error messages. Refer to this table to help diagnose systems problems. Do the corrective action
steps in the order listed.
Guidelines for troubleshooting electrical noise are provided in paragraph 4.6.
A total power failure is indicated if the display remains dark after the system is powered ON. If no signs of
power are present:
1. Reset circuit breaker.
2. Check aircraft power source.
3. Check power input at mating connector.
a. J1-8 (14-28V PWR)
b. J1-7 GND (AIRCRAFT PWR GND)
4. Check internal fuse, replace if defective (refer to para 4.7).
5. Contact Customer Service.
If there is power, but the display is distorted:
1. Check for interference from near-by instruments.
2. Contact Customer Service.
Use the Service Menu (refer to paragraph 4.4) as an aid in fault isolation. Information available from the
service menu can help identify conditions that need to be resolved.
4-8
Rev. C
WX-950
Installation Manual
NOTE
NOTE