R NOTE : Obey when reading the TSD:

____ R - The TSD shows the total number od smoke detectors (SD) R installed (and found) on the smoke detection loop, e.g. xxxx R xxxx xxxx xxx aa/bb. R - The cabin layout shows the number of SDs. If no fault is R found aa is equal to bb. R - aa is the number of SDs of the SDCU channel 1 (counted R clockwise). R - bb is the number of SDs of the SDCU channel 2 (counted R counterclockwise). R All cargo and lavatory smoke detectors are connected in one R loop, with a specified sequence. The FINs of the lavatory R smoke detectors are related to the location of the lavatory R in the cabin. You can ignore the FINs of smoke detectors not R installed on the A/C. R Sequence of smoke detectors in single-loop configuration R (A319/A320):
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 001-049, 051-099, 101-105, 151-199, ∞∞26-17-00∞∞∞∞∞∞∞∞∞∞Page 209
 201-299, May 01/05 CES

R -----------Lavatory Location Designation
R |SDCU | A C B T W H K D E F G
R |CHANNEL1 |--1WQ--3WQ--2WQ--20WQ--23WQ--8WQ--9WQ--4WQ--5WQ--6WQ--7WQ--|
R | | |
R | | |
R | | |
R |CHANNEL2 |--1WH--2WH--3WH--4WH--5WH--6WH-----------------------------|
R | |
R Sequence of smoke detectors in single-loop configuration

R  (A321): 
R  ----------- Lavatory Location Designation 
R  |SDCU  |  A  C  B  H  K  S  T  L  M  D  E 

R |CHANNEL1 |--1WQ--3WQ--2WQ--8WQ--9WQ--19WQ--20WQ--14WQ--15WQ--4WQ--5WQ----|
R | | |
R | | |
R | | G F |
R |CHANNEL2 |--1WH--2WH--3WH--4WH--5WH--6WH--7WH--8WH--9WH--10WH--7WQ--6WQ--|
R | |
R -----------R

R (a) If the TSD gives the value xxxx xxxx xxxx xxx aa/bb (with bb<aa)
R - Replace the SD(bb) (Ref. AMM TASK 26-17-15-000-001) (Ref. AMM
R TASK 26-17-15-400-001) counted counterclockwise from the SDCU
R Channel 2.

 1 If the fault continues:
_ R Replace the SD(bb+1) counted counterclockwise from SDCU R Channel 2 until the TSD gives the value xxxx xxxx xxxx xxx R aa/bb (with aa=bb).
R (b) If the TSD gives the value xxxx xxxx xxxx xxx aa/bb (with aa<bb) R - Replace the SD(aa) (Ref. AMM TASK 26-17-15-000-001) (Ref. AMM R TASK 26-17-15-400-001) counted clockwise from the SDCU Channel R 1.
 1 If the fault continues:
_ R Replace the SD(aa+1) counted clockwise from SDCU Channel 1 R until the TSD gives the value xxxx xxxx xxxx xxx aa/bb (with R aa=bb).
R (3) If the fault continues: R - Do a check of the SDCU PIN PROGRAMMING (Ref. TSM TASK 26-17-00-810-806).
R (4) If the fault continues:
R - Do this procedure for the identification of a defective
R photo-electric type smoke detector.

 NOTE : For this procedure two persons are necessary, one in the
____ cockpit and one to move from detector to detector.
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 001-049, 051-099, 101-105, 151-199, ∞∞26-17-00∞∞∞∞∞∞∞∞∞∞Page 210
 201-299, May 01/05 CES One digital multimeter that can measure 24VDC is necessary.

R The sequence of the troubleshooting procedure (step (a) to R step (n)) is mandatory. Do not stop if you find one defective R smoke detector at the start of the troubleshooting procedure. R One or more smoke detector(s) that follow(s) can have a R defect.
 All cargo and lavatory smoke detectors are connected in a R single loop, with a specified sequence. The FINs of the R lavatory smoke detectors are related to the location of the
 lavatory in the cabin. You can ignore the FINs of smoke R detectors not installed on A/C. The sequence of the connection R and disconnection process shown in the diagram is mandatory.
 (Ref. Fig. 201/TASK 26-17-00-991-001)
 (a) Open the SDCU circuit breakers 11WQ and 12WQ.

 (b) Disconnect the cargo smoke detector 5WH for A319/320 or 7WH for A321.

R (c) Connect the red lead of the DC meter to the pin G and the black R lead to the pin F at the aircraft-side connector of the detector.
R (d) Close the SDCU circuit breakers 11WQ and 12WQ for 40 to 60 R seconds.
 (e) The DC meter pulses between DC voltages.
 1_ If the highest voltage peak shown on the voltmeter is less
 than 22VDC, 
R  - For A319/320: one or more smoke detector(s) of 1WH, 2WH, 
R  3WH, 4WH is(are) defective (between SDCU channel 2 and 5WH). 
R  - For A321: one or more smoke detector(s) of 1WH, 2WH, 3WH, 
　
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