TASK 23-13-00-810-828
Loss of the RMP 3 Data on the Bus 3
1. Possible Causes
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- RMP-COM FREQ SEL, 3 (1RG3)
- wiring
- C/B - COM NAV/RMP/3 (2RG3)
2. Job Set-up Information
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A. Referenced Information
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REFERENCE DESIGNATION
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AMM 23-13-00-740-001 BITE Test of the Radio Management AMM 23-13-13-000-001 Removal of the Radio Management Panel (CRMP) (1RG1, 1RG2, 1RG3) AMM 23-13-13-400-001 Installation of the Radio Management Panel (CRMP) (1RG1, 1RG2, 1RG3) ASM 23-13/01
3. Fault Confirmation
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A. Job Set-up On the RMP 1, RMP 2 and RMP 3, make sure that the ON/OFF switches are at ON.
B. Test Do the BITE test of the Radio Management (Ref. AMM TASK 23-13-00-740-001).
NOTE : Do this test for the RMP 1 and RMP 2 only.
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4. Fault Isolation
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A. Table of the circuit breakers used in this procedure:
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PANEL DESIGNATION IDENT. LOCATION
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121VU COM NAV/RMP/3 2RG3 L03
「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 ∞∞23-13-00∞∞∞∞∞∞∞∞∞∞Page 241
May 01/05R CES
R **ON A/C 001-049, 051-061, 101-105,
B. If the tests give these two maintenance messages
RMP 1 : NO DATA FROM RMP 3
RMP 2 : NO DATA FROM RMP 3:
- do a check of the circuit breaker (2RG3) status.
(1) If the circuit breaker is closed:
- do a check for 28VDC at pin A/N of the RMP 3 (1RG3) (Ref. ASM 23-13/01).
(a) If there is 28VDC:
- replace the RMP-COM FREQ SEL, 3 (1RG3) (Ref. AMM TASK 23-13-13-000-001) and (Ref. AMM TASK 23-13-13-400-001).
1 If the fault continues:
_
- do a check and repair the wiring of the DIALOGUE OUTPUT signal, (from the RMP 3 (1RG3) pins A/BB, CC to the first terminal block) (Ref. ASM 23-13/01).
(b) If there is no 28VDC:
- do a check for a ground signal at pin A/R of the RMP 3 (1RG3) (Ref. ASM 23-13/01).
1 If there is no ground signal:
_
- repair the wiring between RMP 3, pin A/R and the ground terminal (Ref. ASM 23-13/01).
2 If there is no ground signal:
_
- do a check of the wiring between RMP, pin A/N and the circuit breaker (2RG3) (Ref. ASM 23-13/01).
a If there is no continuity:
_ - repair the above wiring.
b If there is continuity:
_
- replace the circuit breaker (2RG3).
(2) If the circuit breaker is open:
- close it.
(a) If it opens again:
- replace the RMP 3 (1RG3) (Ref. AMM TASK 23-13-13-000-001) and (Ref. AMM TASK 23-13-13-400-001).
1 If the fault continues:
_
- do a check for a short to ground at the wiring between the RMP 3 (1RG3) pin A/N and the circuit breaker (2RG3) (Ref. ASM 23-13/01).
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 001-049, 051-061, 101-105, ∞∞23-13-00∞∞∞∞∞∞∞∞∞∞Page 242
May 01/05 CES 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/RMP/3 (2RG3).
(b) If the circuit breaker stays closed and the fault continues:
- replace the RMP 3 (1RG3) (Ref. AMM TASK 23-13-13-000-001) and (Ref. AMM TASK 23-13-13-400-001).
R **ON A/C 062-099, 106-149, 151-199, 201-299, 301-399, 401-499,
B. If the tests give these two maintenance messages
RMP3(1RG3)/RMP1(1RG1)
RMP3(1RG3)/RMP2(1RG2):
- do a check of the circuit breaker (2RG3) status.
(1) If the circuit breaker (2RG3) is closed:
- do a check for 28VDC at pin A/N of the RMP 3 (1RG3) (Ref. ASM 23-13/01).
(a) If there is 28VDC:
- replace the RMP-COM FREQ SEL, 3 (1RG3) (Ref. AMM TASK 23-13-13-000-001) and (Ref. AMM TASK 23-13-13-400-001).
1 If the fault continues:
_
- do a check and repair the wiring of the DIALOGUE OUTPUT signal, (from the RMP 3 (1RG3) pins A/BB, CC to the first terminal block) (Ref. ASM 23-13/01).
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