R b_ If there is no short to ground:
R - replace the C/B-COM NAV/HF 1 (1RE1).

 「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 ∞∞23-11-00∞∞∞∞∞∞∞∞∞∞Page 202
 Feb 01/99 CESR (b) If the circuit breaker stays closed and the fault continues: R - replace the HF 1 transceiver (3RE1) (Ref. AMM TASK 23-11-33-R 000-001) and (Ref. AMM TASK 23-11-33-400-001).

R C. Do the test given in Para. 3.

R **ON A/C 001-049, 051-099, 101-105, 151-199, 201-210, 301-399, 401-499,
 TASK 23-11-00-810-802
 Failure of the HF 2 Transceiver
 1. Possible Causes
_______________
 - XCVR-HF, 2 (3RE2)

 - wiring

 - C/B-COM NAV/HF2 (1RE2)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
AMM 23-11-00-740-001 Bite Test of the HF System
 AMM 23-11-33-000-001 Removal of the HF Transceiver (3RE1, 3RE2)
 AMM 23-11-33-400-001 Installation of the HF Transceiver (3RE1, 3RE2)
 ASM 23-11/02

 3. Fault Confirmation
__________________
 A. Test
 (1) Do the BITE test of the HF system (Ref. AMM TASK 23-11-00-740-001). NOTE : Do this test for the HF 2 only.
____
 4. Fault Isolation
_______________
 A. Table of the circuit breakers used in this procedure:
 -------------------------------------------------------------------------------
PANEL DESIGNATION IDENT. LOCATION
 -------------------------------------------------------------------------------
R **ON A/C 001-049, 051-099, 101-105, 151-199, 201-210, 301-399,
 121VU COM NAV/HF2

「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 R EFF : 001-049, 051-099, 101-105, 151-199, 201-210, 301-399, 401-499,
CES
1RE2 L13
 ∞∞23-11-00∞∞∞∞∞∞∞∞∞∞Page 204

R **ON A/C 001-049, 051-099, 101-105, 151-199, 201-210, 301-399, 401-499,

 B. If the test gives the maintenance message HF2 (3RE2):
 - do a check of the circuit breaker (1RE2) status.
 (1) If the circuit breaker is closed:
 - do a check for 115VAC at pins AC/4, 5, 6 of the HF 2 transceiver (3RE2) (Ref. ASM 23-11/02).
 (a) If there is 115VAC:

 - replace the XCVR-HF, 2 (3RE2) (Ref. AMM TASK 23-11-33-000-001) and (Ref. AMM TASK 23-11-33-400-001).

 (b) If there is no 115VAC:

 - do a check for a ground signal at pin AC/8 of the HF 2 transceiver (3RE2) (Ref. ASM 23-11/02).
 1_ If there is no ground signal:
 - repair the wiring between the HF 2 transceiver (3RE2) pin
 AC/8 and the ground terminal (Ref. ASM 23-11/02).

 2 If there is a ground signal:
_
 - do a check of the wiring from the HF 2 transceiver (3RE2) pins AC/4, 5, 6 to the circuit breaker (1RE2) (Ref. ASM 23-11/02).
 a If there is no continuity:
_
 - repair the above wiring. b If there is continuity:
_ - replace the circuit breaker (1RE2).
 (2) If the circuit breaker is open:
 - close it.
 (a) If it opens again:
 - replace the HF 2 transceiver (3RE2) (Ref. AMM TASK 23-11-33-000-001) and (Ref. AMM TASK 23-11-33-400-001).
 1 If the fault continues:
_
 - do a check for a short to ground at the wiring (between the HF 2 transceiver (3RE2) pins AC/4, 5, 6 and the circuit breaker) (1RE2) (Ref. ASM 23-11/02).
 a If there is a short to ground:
_
 - repair the related wiring. b If there is no short to ground:
_ - replace the C/B-COM NAV/HF2 (1RE2).
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 001-049, 051-099, 101-105, 151-199, ∞∞23-11-00∞∞∞∞∞∞∞∞∞∞Page 205
 201-210, 301-399, 401-499, Aug 01/05 CES

 (b) If the circuit breaker stays closed and the fault continues:
 - replace the HF 2 transceiver (3RE2) (Ref. AMM TASK 23-11-33-000-001) and (Ref. AMM TASK 23-11-33-400-001).
 C. Do the test given in Para. 3.
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 001-049, 051-099, 101-105, 151-199, ∞∞23-11-00∞∞∞∞∞∞∞∞∞∞Page 206
　
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