Flash Technology FTB 312-3, Reference Manual

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FTB 312 and FTS 316 Revision13 — 02-20-2001 3-7
3. Ensure that the tube is vertical.
4. Tighten the three screws on the screw lugs to
secure the flashtube.
5. Check the free rise and fall of the red filter by
lifting and dropping the actuator arm.
Flashtube Mounting Plate Assembly (FH 306)
Components attached to the flashtube mounting
plate (except the flashtube, the coupling trans-
former, and RC1 and RC2) require removing the
entire mounting plate assembly and replacing it
with a new one.
Removal
1. Remove the flashhead cable wires from the
ceramic posts on the mounting plate assembly.
2. Remove the three mounting screws that hold
the mounting plate assembly to the flashhead.
3. Lift the mounting plate clear of the flashhead
base.
Replacement
1. Reverse the removal sequence.
Trigger Transformer, T101 (FH 307T, FH 308)
Refer to Figure 4-5 FH 307T Flashhead Compo-
nent Location and Figure 4-6 FH 308 Flashhead
Component Location .
Removal
1. At the trigger wire post adjacent to the flash-
tube, remove the large diameter wire coming
from the trigger transformer.
2. At one of the smaller, side-mounted ceramic
posts, remove the small wire to the trigger
transformer. Do not disconnect the primary
winding wires (seven turns of hook-up wire).
3. Remove the two 4-40 x 2" Phillips
®
-head
screws holding the transformer assembly to
the bracket. Note the orientation of the
molded secondary winding with respect to
fixed features on the bracket, since it must be
reinstalled with this same orientation.
4. Remove the outer half of the core and lift off
the molded secondary winding. The primary
winding will remain hanging in place.
5. Remove the inner half of the core.
Replacement
1. Reassemble the primary and secondary wind-
ings over the two halves of the core. Attach the
core to the bracket using the two long screws.
2. Reattach the wires. Verify that wiring is in
accordance with Figure 2-21 FH 307T Flash-
head Internal Wiring or Figure 2-22 FH 308
Flashhead Internal Wiring .
Coupling Transformer, T102
Refer to the flashhead component locations dia-
gram Figure 4-4, Figure 4-5, or Figure 4-6 and
internal wiring diagram Figure 2-19, Figure 2-21,
or Figure 2-22.
Removal and replacement are similar to the pro-
cedure for the trigger transformer (T101).
Operational Checkout
Single-Unit System
During testing expose the photocell to normal out-
door daylight. Carefully perform the following
steps and take the suggested action if any of the
responses differ from the response described.
Multiple-Unit System
A system with more than one power converter
unit is a multiple-unit system. Refer to any figure
in Section 2 that shows multiple-unit installation.
You connect the first unit; the designated master
unit, from terminals TB1-1 and TB1-2 directly to
the photocell. The two other power converters
each jumper together their terminals TB1-1 and
TB1-2. Intensity information is supplied over the
master/slave interconnect line to all power con-
verters.
Each power converter, in the chain of power con-
verters, sends a synchronization signal over the
bidirectional wires at terminals TB1-4 and TB1-5
to flash all lights together. A master power con-
verter sends a back-up signal at night if its top-
most red light fails. Note that a lamp going out in
a tier of red incandescent marker lights indicates
a marker alarm but does not cause back-up night
intensity operation.
Normal operation at night calls for monitoring a
set of steadily burning markers installed at one
structure level (tier). In configurations with more
than one red flashhead at the same structure
level (or tier), the additional flashhead does not