Fitting the 4-Way Sounder PCB
Fitting the Second-layer 4-Way Sounder PCB
Fitting/Replacing the 4-Way Sounder PCB
10
Inspect the 4-Way Sounder PCB (I). If there is no evidence of damage,
proceed with fitting.
11
If a second-layer PCB is being fitted go to step 17 before continuing.
Otherwise, connect the 16-way ribbon cable (J) to the outermost
connector SK2 (K). Observe polarity. Slide the ferrite along the ribbon
cable so that it is near to SK2.
12
With the PCB (I) correctly orientated - the wiring connectors must be at
the top - offer it to the space to the left of the PSU PCB (L).
13
Align and locate the 4-Way Sounder PCB in the two locating slots (M) and
once located, push the top of the PCB to engage the two retaining spring
clips (N).
14
Push the PCB home until secure. The two upper holes on the PCB
should locate cleanly on the lugs (O).
15
Connect the other end of the 16-way ribbon cable (J) to SK1 on the PSU
PCB.
16
If a second-layer PCB (either 8-way Relay or 4-way Sounder) is not
being fitted, the Main PCB can now be re-fitted. Ensure that:
i
The ribbon cable is re-connected to SK2 on the PSU PCB.
ii
The PCB is correctly aligned with the rebates in the side wall ribs
before gently pushing it home.
17
With reference to the drawings immediately at left, fit two spacers in the
lower of the two top pairs of holes on the first-layer PCB as follows:
a. Insert each rivet (P) in the holes as far as the collar (this is about half
way along the rivet) and no further at this stage.
b. Place the larger end of the spacer (Q) - the end with the locating hole
- over the partially-inserted rivet until flush with the face of the PCB.
c. Holding the spacer against the PCB, now push the rivet fully home;
the jaws of the rivet expand inside the spacer to lock it to the PCB.
Ensure the spacer is orientated as shown to clear any components.
18
Inspect the 4-Way Sounder PCB to be fitted in the second-layer
position. If there is no evidence of damage, proceed as follows.
19
Connect the 16-way ribbon cable (S) - observe polarity - to connector
SK1 of the first-layer 4-Way Sounder PCB (I).
20
Offer the bottom edge of the second-layer PCB towards the two lower
locating slots (T) and connect the other end - observe polarity - of the
ribbon cable to the connector SK2 located on the second-layer 4-Way
PCB. Slide the ferrite to be beside SK2, closer than in step 11.
21
Align and locate the 4-Way Sounder PCB in the two locating slots (T)
and line up the two spacers with the upper two holes on the second-
layer PCB and push the top part of the PCB so that the spacers engage
and locate in the holes.
22
Re-fit the Main PCB and re-connect the ribbon cable to the PSU PCB.
23
Connect all external wiring to the 4-Way Sounder PCB(s).
24
Re-connect all external wiring to the Main PCB.
25
Apply power and connect batteries.
26
Ensure any faults are cleared before replacing the cover.
N
O
With the Main PCB removed....
2
T
Follow steps 10 to16 if only fitting one 4-way Sounder PCB. If fitting two 4-
way Sounder PCBs follow steps 10 and 11 then go step 17 before
continuing with steps 12 - 16.
If two PCBs are being fitted use the spacer and rivet (with collar) supplied
with the kit. Where a faulty PCB being replaced, use the spacers and rivets
supplied with this kit. Discard previous type of spacers (i.e without rivet)
where used.
12
12
12
12
M
L
I
K
J
17
17
P, R
Q
Q
R
P
a
b
c
SK2
20
20
S
19
19
997-536-000-2, Issue 2 July 2009