- replace the AMPLIFIER-CVR MIC (18RK) (Ref. AMM TASK 23-71-14-000-001) and (Ref. AMM TASK 23-71-14-400-001).
(2) If the fault continues:
- replace the MIC-CVR (16RK) (Ref. AMM TASK 23-71-13-000-001) and (Ref. AMM TASK 23-71-13-400-001).
「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 ∞∞23-71-00∞∞∞∞∞∞∞∞∞∞Page 205
Feb 01/98 CES (3) If the fault continues:
- do a check and repair the wiring of the amplifier (18RK) and of the microphone (16RK) (Ref. ASM 23-71/02).
B. Do the test given in Para. 3.
TASK 23-71-00-810-805
Recording on All the Channels Inoperative
1. Possible Causes
_______________
- CVR (1RK)
- wiring
- C/B-COM/CVR/SPLY (2RK)
- C/B-COM/CVR/CTL (4RK)
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 23-71-00-710-001 Operational Test of the CVR and the CVR Channel
Recording AMM 23-71-35-000-001 Removal of the Cockpit Voice Recorder (CVR) 1RK AMM 23-71-35-400-001 Installation of the Cockpit Voice Recorder (CVR) 1RK ASM 23-71/01
3. Fault Confirmation
__________________
A. Test
(1) Do the operational test of the CVR and the CVR channel recording (Ref. AMM TASK 23-71-00-710-001).
4. Fault Isolation
_______________
A. Table of the circuit breakers used in this procedure:
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU COM/CVR/SPLY 2RK E14
B. If during the operational test the recording is inoperative:
- push the MON. IND. FOR GND/CTL pushbutton switch (11TU) on the panel 21VU.
(1) If it comes on and the fault continues:
- replace CVR (1RK) (Ref. AMM TASK 23-71-35-000-001) and (Ref. AMM TASK 23-71-35-400-001).
(a) If the fault continues:
- do a check of the circuit breaker (2RK) status.
1 If the circuit breaker is closed:
_
- do a check for a ground signal at pin 3 of the CVR (1RK) (Ref. ASM 23-71/01).
a If there is no ground signal:
_
- repair the wiring from CVR (1RK) pin A/3 to the first terminal block (Ref. ASM 23-71/01).
b If there is a ground signal:
_
- do a check of the wiring from the C/B (2RK) to the first terminal block and of the relay (8RK) (Ref. ASM 23-71/01). . If there is no continuity:
* repair the above wiring. . If there is continuity:
* replace the C/B-COM/CVR/SPLY (2RK).
2 If the circuit breaker is open:
_ - close it.
a If it opens again:
_
- replace the C/B-COM/CVR/SPLY (2RK).
b If it opens again:
_
- do a check for a short to ground and repair the wiring of the system (Ref. ASM 23-71/01).
(2) If it does not come on:
- do a check of the circuit breaker (4RK) status.
(a) If the circuit breaker is closed:
- do a check of the wiring located downstream of the circuit breaker (4RK) (Ref. ASM 23-71/01).
1 If there is no continuity:
_ - repair the above wiring.
2 If there is continuity:
_ - replace the C/B-COM/CVR/CTL (4RK).
「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 ∞∞23-71-00∞∞∞∞∞∞∞∞∞∞Page 208
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