(2) Do the BITE test of the ADF (Ref. AMM TASK 34-53-00-740-003).

 - If the BITE test is not possible, refer to Para. 4. B. of this trouble shooting procedure.

 4. Fault Isolation
_______________

R **ON A/C 001-049, 051-051, 053-099, 101-149, 151-199, 201-299, 301-399, R 401-499,
 A. If the circuit breaker (1RP1) is closed, and if the BITE test gives the maintenance message ADF1 (2RP1):
 - replace the RECEIVER-ADF, 1 (2RP1) (Ref. AMM TASK 34-53-31-000-002) and (Ref. AMM TASK 34-53-31-400-002).
 (1) If the fault continues:
 - do a check of the wiring from the ADF antenna 1 (3RP1) to the ADF receiver 1 (2RP1) (Ref. ASM 34-53/01).
 (a) If there is no continuity:

 - repair the above wiring.

 (b) If there is continuity:

 - repair the ANTENNA-ADF LOOP AND SENSE, 1 (3RP1) (Ref. AMM TASK 34-53-11-000-001) and (Ref. AMM TASK 34-53-11-400-001).
 **ON A/C 052-052,
 A. If the circuit breaker (1RP1) is closed, and if the BITE test gives the maintenance message ADF1 RECEIVER:
 - replace the RECEIVER-ADF, 1 (2RP1) (Ref. AMM TASK 34-53-31-000-002) and (Ref. AMM TASK 34-53-31-400-002).
 (1) If the fault continues:
 - do a check of the wiring from the ADF antenna 1 (3RP1) to the ADF receiver 1 (2RP1) (Ref. ASM 34-53/01).
 (a) If there is no continuity:

 - repair the above wiring.

 (b) If there is continuity:

 - repair the ANTENNA-ADF LOOP AND SENSE, 1 (3RP1) (Ref. AMM TASK 34-53-11-000-001) and (Ref. AMM TASK 34-53-11-400-001).

 B. If the circuit breaker (1RP1) is closed and if the BITE test is not possible
 - do a check for 115VAC at pin AC/2 of the ADF receiver 1.
 (1) If there is no 115VAC:

 - do a check of the wiring of the 115VAC signal from circuit breaker (1RP1) to ADF receiver 1 (2RP1) (Ref. ASM 34-53/01).
 (a) If there is no continuity:

 - repair the above wiring.

 (b) If there is continuity:

 - replace the C/B-NAV/ADF/1 (1RP1).

 (2) If there is 115VAC:

 - do a check of the wiring of the ground signal at ADF receiver 1 pin AC/4.
 (a) If there is no continuity:
 - repair the above wiring.
 C. If the circuit breaker (1RP1) is open:
 - close this circuit breaker.
 (1) If the circuit breaker (1RP1) trips:
 - remove the RECEIVER-ADF, 1 (2RP1) (Ref. AMM TASK 34-53-31-000-002).

 - close the circuit breaker (1RP1).

 (a) If this circuit breaker stays closed:
 - install the ADF receiver 1 (Ref. AMM TASK 34-53-31-400-002)
 1 If the circuit breaker trips again:
_
 - replace the ADF receiver 1 (Ref. AMM TASK 34-53-31-000-002) and (Ref. AMM TASK 34-53-31-400-002).
 (b) If this circuit breaker trips again: R - do a check for a short to ground at the wiring between the R circuit breaker (1RP1) and the ADF receiver 1 (2RP1) (Ref. ASM
 34-53/01).
 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/ADF/1 (1RP1).
 3 Install the ADF receiver 1
_ (Ref. AMM TASK 34-53-31-400-002).
 「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 ∞∞34-53-00∞∞∞∞∞∞∞∞∞∞Page 203
 Aug 01/05 CES

 D. Do the test given in Para. 3.

 Failure of the ADF Receiver 2
 1. Possible Causes
_______________
 - RECEIVER-ADF, 2 (2RP2)

 - ANTENNA-ADF LOOP AND SENSE, 2 (3RP2)

 - wiring from the ADF antenna 2 (3RP2) to the ADF receiver 2 (2RP2) R - short to ground at the wiring between the circuit breaker (1RP2) and the R ADF receiver 2 (2RP2)
 - C/B-NAV/ADF/2 (1RP2)
 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 34-53-00-740-003 BITE Test of the ADF
 AMM 34-53-11-000-001 Removal of the ADF Loop and Sense Antenna
 AMM 34-53-11-400-001 Installation of the ADF Loop and Sense Antenna
 AMM 34-53-31-000-002 Removal of the ADF Receiver (2RP1, 2RP2)
 AMM 34-53-31-400-002 Installation of the ADF Receiver (2RP1, 2RP2)
 ASM 34-53/01

 3. Fault Confirmation
　
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