R (1) Do the BITE test of the weather radar (Ref. AMM TASK 34-41-00-740-R 002).
R 4. Fault Isolation
_______________
R A. If the BITE test gives the maintenance message CFDIU (1TW)/WXR2 (1SQ2):
R - replace the XCVR-WEATHER RADAR, 2 (1SQ2) (Ref. AMM TASK 34-41-33-000-R 004) and (Ref. AMM TASK 34-41-33-400-003).

R (1) If the fault continues:
R - do a check and repair the wiring of the MAINTENANCE DATA INPUT bus
R from the weather radar transceiver 2 (1SQ2) to the first terminal
R block (Ref. ASM 34-41/01).

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

 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 051-099, ∞∞34-41-00∞∞∞∞∞∞∞∞∞∞Page 238
 May 01/05 CESR **ON A/C ALL

 TASK 34-41-00-810-818
 Failure of the Waveguide Switch (System 1)
 1. Possible Causes
_______________
 - XCVR-WEATHER RADAR, 1 (1SQ1)

 - CTL UNIT-WEATHER RADAR (3SQ)

 - wiring between the WR transceiver 1 and the wave guide switch

 - wiring of the weather radar transceiver mounting tray (9SQ)

 - wave guide switch

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
AMM 34-41-00-740-002 BITE Test of the Weather Radar
 AMM 34-41-12-000-001 Removal of the Weather Radar Control Unit (3SQ)
 AMM 34-41-12-400-001 Installation of the Weather Radar Control Unit (3SQ)
 AMM 34-41-33-000-004 Removal of the Weather Radar Transceiver (1SQ1, 1SQ2)
 AMM 34-41-33-400-003 Installation of the Weather Radar Transceiver (1SQ1,

 1SQ2) AMM 34-41-37-000-001 Removal of the Weather Radar Transceiver Mounting Tray (9SQ) AMM 34-41-37-400-001 Installation of the Weather Radar Transceiver Mounting Tray (9SQ) ASM 34-41/01
 3. Fault Confirmation
__________________
 A. Test
 (1) Do the BITE test of the weather radar (Ref. AMM TASK 34-41-00-740-002).
 4. Fault Isolation
_______________
 A. If the BITE test gives the maintenance message WXR MOUNTING TRAY (9SQ):
 - remove the XCVR-WEATHER RADAR, 1 (1SQ1) (Ref. AMM TASK 34-41-33-000-004)

 - get access to the MTG TRAY-WR XCVR (9SQ) (Ref. AMM TASK 34-41-37-000-001)

 - disconnect the electrical connector of the wave guide switch

 - do a check of the wiring between the WR transceiver 1 and the wave guide switch: pins AB/8D and A/C (Ref. ASM 34-41/01).

 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞34-41-00∞∞∞∞∞∞∞∞∞∞Page 239
 May 01/05 CES

 (1) If there is no continuity:

 - repair the above wiring.

 - connect the electrical connector of the wave guide switch (Ref. AMM TASK 34-41-37-400-001)

 - install the weather radar transceiver 1 (Ref. AMM TASK 34-41-33-400-003).

 (2) If there is continuity:

 - do a check of the wiring of the weather radar transceiver mounting tray (9SQ): . from pin A/F to the ground point . from pin A/A to the weather radar control unit (3SQ), pin A/D (Ref. ASM 34-41/01).
 (a) If the wiring is not ok:

 - repair the above wiring.

 (b) If the wiring is ok:

 - replace the wave guide switch (Ref. AMM TASK 34-41-37-000-001) and (Ref. AMM TASK 34-41-37-400-001).
 1_ If the fault continues:
 - replace the CTL UNIT-WEATHER RADAR (3SQ) (Ref. AMM TASK 34-
41-12-000-001) and (Ref. AMM TASK 34-41-12-400-001).

 a If the fault continues:
_
 - replace the weather radar transceiver 1 (Ref. AMM TASK 34-41-33-000-004) and (Ref. AMM TASK 34-41-33-400-003).
 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 ∞∞34-41-00∞∞∞∞∞∞∞∞∞∞Page 240
 May 01/05R
 CES R **ON A/C 051-099,

R TASK 34-41-00-810-819 R Failure of the Waveguide Switch (System 2) R 1. Possible Causes
_______________
R - XCVR-WEATHER RADAR, 2 (1SQ2)
R - CTL UNIT-WEATHER RADAR (3SQ)
R - wiring between the WR transceiver 2 and the wave guide switch
R - wiring of the weather radar transceiver mounting tray (9SQ)
　
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