____ result from a bad transmission from the ground station.
(2) If the test is not OK:
- refer to the procedures (Ref. TASK 34-53-00-810-820) and (Ref. TASK 34-53-00-810-822) (para. fault isolation only).
VOR/MARKER - FAULT ISOLATION PROCEDURES
_______________________________________
TASK 34-55-00-810-801
Failure of the VOR/MKR Receiver 1
1. Possible Causes
_______________
- RECEIVER-VOR/MKR, 1 (3RS1)
- short to ground at the wiring between the circuit breaker (2RS1) and the VOR/MK receiver 1 (2RS1)
- C/B-NAV/VOR/1 (2RS1)
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION
-------------------------------------------------------------------------------
AMM 34-55-00-740-002 BITE Test of the VOR/MKR
AMM 34-55-31-000-001 Removal of the VOR/MKR Receiver (3RS1, 3RS2)
AMM 34-55-31-400-001 Installation of the VOR/MKR Receiver (3RS1, 3RS2)
ASM 34-55/01
3. Fault Confirmation
__________________
A. Make sure that this(these) circuit breaker(s) is(are) closed:
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU NAV/VOR/1 2RS1 G13
B. Test
(1) If the circuit breaker (2RS1) trips, refer to Para. 4. C. of this trouble shooting procedure.
(2) Do the BITE test of the VOR/MKR (Ref. AMM TASK 34-55-00-740-002).
- If the BITE test is not possible, refer to Para. 4. B. of this trouble shooting procedure.
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞34-55-00∞∞∞∞∞∞∞∞∞∞Page 201
Feb 01/00R
CES 4. Fault Isolation
_______________
R
A. If the circuit breaker (2RS1) is closed, and if the BITE test gives the maintenance message VOR1 (3RS1):
- replace the RECEIVER-VOR/MKR, 1 (3RS1) (Ref. AMM TASK 34-55-31-000-001)
and (Ref. AMM TASK 34-55-31-400-001). R
B. If the circuit breaker (2RS1) is closed and if the BITE test is not possible
- do a check for 115VAC at pin AC/2 of the VOR/MKR receiver 1.
(1) If there is no 115VAC:
- do a check of the wiring of the 115VAC signal from circuit breaker (2RS1) to VOR/MKR receiver 1 (3RS1) (Ref. ASM 34-55/01).
(a) If there is no continuity:
- repair the above wiring.
(b) If there is continuity:
- replace the C/B-NAV/VOR/1 (2RS1).
(2) If there is 115VAC:
- do a check of the wiring of the ground signal at VOR/MKR receiver 1 pin AC/3.
(a) If there is no continuity:
- repair the above wiring.
C. If the circuit breaker (2RS1) is open:
- close this circuit breaker.
(1) If the circuit breaker (2RS1) trips:
- remove the RECEIVER-VOR/MKR, 1 (3RS1) (Ref. AMM TASK 34-55-31-000-001).
- close the circuit breaker (2RS1).
(a) If this circuit breaker stays closed:
- install the VOR/MKR receiver 1 (Ref. AMM TASK 34-55-31-400-001)
1 If the circuit breaker trips again:
_
- replace the VOR/MKR receiver 1 (Ref. AMM TASK 34-55-31-000-001) and (Ref. AMM TASK 34-55-31-400-001).
(b) If this circuit breaker trips again:
- do a check for a short to ground at the wiring between the circuit breaker (2RS1) and the VOR/MK receiver 1 (2RS1) (Ref. ASM 34-55/01).
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞34-55-00∞∞∞∞∞∞∞∞∞∞Page 202
Feb 01/05 CES
1_ If there is a short to ground:
- repair the above wiring.
2_ If there is no short to ground:
- replace the C/B-NAV/VOR/1 (2RS1).
3_ Install the VOR/MKR receiver 1
(Ref. AMM TASK 34-55-31-400-001).
D. Do the test given in Para. 3.
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞34-55-00∞∞∞∞∞∞∞∞∞∞Page 203
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