Flash Technology FTB 312-3, Справочное руководство

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FTB 312 and FTS 316 Revision13 — 02-20-2001 3-1
Section 3 — Maintenance and Troubleshooting
Safety
WARNING
STOP: Before proceeding—read warn-
ing on Page iii.
Work safely as follows:
1. Remove rings and watches before opening the
equipment.
2. Shut off the equipment.
3. Remove the component or connect the test
instrument.
4. Replace the component.
5. Turn on the power and test the system.
6. Turn off the power and disconnect the test
equipment.
Preventive Maintenance
Carry out the following inspection and cleaning
procedures at least once a year:
1. Verify that moisture has not entered the
equipment through gaskets or seals, or col-
lected inside as condensation.
2. Verify that all drain holes are clear.
3. Check terminal blocks and relays for evidence
of corrosion and electrical arcing. Clean or
replace any component that shows evidence of
high-voltage damage.
4. Check flashtube connections for signs of pit-
ting or arcing. Verify that anode and cathode
connections are firmly tightened.
5. Check all electrical connections for tightness
and verify the absence of corrosion or electri-
cal arcing.
6. Clean the outside surface of the lens with liq-
uid detergent and water. Wipe it gently with a
soft cloth or paper towel.
7. Clean the inside surface of the lens with an
FTCA-approved professional plastic cleaner.
Wipe the lens with cheesecloth only. Do not
use regular cloth or paper towels. A lens clean-
ing kit, Part Number 8630801, is available
from FTCA.
Storage
No special considerations are required for
long-term storage of any major assembly, such as
the power converter, flashhead, photocell or any
internal component. Circuit boards, when not
installed in the equipment, should be kept in anti-
static bags or containers.
Diagnostic Testing
This subsection describes procedures for basic
functional testing. The only effective way to check
out interconnected power converters is to discon-
nect the wire labeled master/slave interconnect
that is connected to TB1-4 and check them as sin-
gle units, as described in the subsection Checkout
Procedures, described in subsequent text.
Sync Signal Evaluation
Refer to Figure 2-11. Note that, for each power
converter, a master/slave interconnect line and its
return line are connected to TB1-4 and TB1-5
respectively. All units place a sync pulse on the
line; the first sync pulse on the line synchronizes
the remaining lights to flash all the lights at the
same time. PCB1 in each power converter gener-
ates a sync pulse. The width of the sync pulse con-
trols the mode of operation.
The top light must be operated by the master
power converter and the PEC must be connected
to the master power converter. In the event of a
top-most red light failure at night, the master
power converter places a back-up signal on the
line that causes all connected units to flash the
white lights at the correct night intensity.
The sync signal is a pulse and difficult to evaluate
with a meter. You can detect the sync pulse as an
instantaneous movement of the meter indicator. A
digital meter with a max-min function may cap-
ture part of the pulse. This is generally a suffi-
cient indication of a pulse being present. (A 24V
pulse of 16 ms. width might read 12V on a 100 ms.
capture time of max-min function.)