TASK 31-32-00-810-931
Failure of the CFDIU BITE Memory
1. Possible Causes
_______________
- CFDIU (1TW)
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 31-32-00-740-002 BITE Test of the Centralized Fault Display Interface
Unit (CFDIU)
AMM 31-32-34-000-001 Removal of the CFDIU (1TW)
AMM 31-32-34-400-001 Installation of the CFDIU (1TW)
3. Fault Confirmation
__________________
A. Table of the circuit breakers used in this procedure:
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------
121VU CFDS/CFDIU/SPLY 2TW J18
B. Open and close the circuit breaker 2TW before the test.
C. Do the BITE test of the CFDIU (Ref. AMM TASK 31-32-00-740-002).
4. Fault Isolation
_______________
A. If the test gives the maintenance message CFDIU BITE MEMORY:
- replace the CFDIU (1TW), (Ref. AMM TASK 31-32-34-000-001) and (Ref. AMM TASK 31-32-34-400-001).
B. 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 ∞∞31-32-00∞∞∞∞∞∞∞∞∞∞Page A278
May 01/05R CES
TASK 31-32-00-810-932
Failure of the Discrete Links
1. Possible Causes
_______________
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
31-32-00-991-001 Fig. 201
3. Fault Confirmation
__________________
A. Not applicable, refer to the initial procedure .
4. Fault Isolation
_______________
(Ref. Fig. 201/TASK 31-32-00-991-001)
A. Trouble Shooting Procedure for the Discrete Links.
Use the procedure that follows to find:
- if the fault is in one of the receivers (computer B, C or D) of the discrete signal (refer to the schematic in the initial procedure to find the receivers related to the discrete signal), or
- if the fault is an unwanted ground of the discrete signal.
A fault in one receiver can change the status of the discrete signal and cause a fault detection by all the receivers.
The initial trouble shooting procedure can only let you know that the possible cause of the fault is the discrete source A or the wiring (discontinuity of the discrete signal).
(1) Remove the computer B.
(2) Do the test given in Para. 3. of the initial procedure.
(a) if the fault stops:
- replace the computer B.
(b) If the fault continues:
- install the computer B
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞31-32-00∞∞∞∞∞∞∞∞∞∞Page A279
May 01/05R CES
Discrete Links Failure
Figure 201/TASK 31-32-00-991-001
「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 ∞∞31-32-00∞∞∞∞∞∞∞∞∞∞Page A280
May 01/05R CES
- remove the computer C
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