Instruction manual

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CAUTION: High voltage present on the PC board. DO NOT handle it while in operation!
OPERATION
1. Turn the unit on and turn the knob to the desired flash rate. As you adjust the knob clockwise, the flash rate
will increase. The maximum flash rate should be at the mid point.
The maximum flash rate can be adjusted to approximately 4 times per second.
TROUBLESHOOTING
Consult your instructor or contact Elenco Electronics if you have any problems. DO NOT contact your place of
purchase as they will not be able to help you.
1. One of the most frequently occurring problems is poor solder connections. Tug slightly on all of the parts to
make sure that they are indeed soldered.
2. All solder connections should be shiny. Resolder any that are not.
3. Solder should flow into a smooth puddle rather than a round ball. Resolder any connection that has formed
into a ball.
4. Have any solder bridges formed? A solder bridge may occur if you accidentally touch an adjacent foil by
using too much solder or by dragging the soldering iron across adjacent foils. Break the bridge with your
soldering iron.
5. Check the battery voltage with a voltmeter (4.5VDC).
6. Check the voltage across C4 for 250 - 350V. If less, then check the battery, R1, C1 - C3, Q1, D2 and/or T1.
If greater, then check R2 - R4, VR1, Neon, SCR, C6, T2 and/or the flash tube.
7. If the Neon flashes but the strobe light doesn’t, then check the SCR, C6, T2, battery voltage and/or the flash
tube.
Figure 16
Figure 15
Strobe Light Kit
AK-520
OFF ON
FLASH RATE
4 x 1/2” Screws
Knob - Turn the
shaft on the pot
counter-clockwise
all of the way.
Install the knob
with the line
pointing in the
direction as shown
in Figure 16.
Place the lid onto
the case and
secure it with four
4 x 1/2” screws
(see Figure 15).