Daktronics AB-1010 - Manual (Page 31)

Maintenance & 4-7
pressuri abinet a air from inside the cabinet out four small holes near each lamp.
Airflow cannot be restricted to the bottom of the display cabinet. If the display frame is “skinned”
over, adequate ventilati
d thr in. Holes in the skin must be equal
to the si uantity the D e
bottom of the display ca
A faulty
tat or c aired or replaced as soon as possible to extend the life
of the di electric cooling fa display should fail,
use the following guide orrect the
1.
ake sure the breakers to driver A101 (refer to the following table for A101 location) are in the
own.
2. securing the appropriate socket panel(s), and swing panel(s) up. Secure
.
3. h on the thermostat assembly to see if fans are activated. If one or more
rs do not, replace the fans that do not work.
4. fails to activate any of the fans, remove the cover from the thermostat
ssembly and check for a blown fuse. Replace fuse if necessary (MDL-2 ½ amp, 125 volt).
5. tivates all the fans, test the thermostat by using a soldering iron to heat
he metal behind the ½" hole punched in the cover). If the fans do not
ermostat, the thermostat assembly should be replaced.
If p
ling system persist, contact a Daktronics customer service
repr
To
splay, follow the steps below while referring to Drawing A-43185.
1.
splay according to Section 4.4.
. Disconnect the power wiring to the fan.
3. h tt e d
4. Lift the fan fro n
5. Re se the roce ins ew f
4.11 tructu spe
ze the c nd force warm
on ports must be provide oughout the sk
ze and q of the holes provided in
binet.
aktronics cabinet. Holes must be located in th
thermos ooling fan must be rep
splay’s al components. If a n or fans in the bottom of the
lines to locate and c malfunction.
M
ON position and are not bl
Remove the two screws
panel(s) with prop rod(s)
Push the momentary switc
fans operate while othe
If the momentary switch
a
If the momentary switch ac
up the thermostat (heat t
activate by heating up the th
roblems with the display coo
esentative.
remove a fan from the di
Open the di
2
Remove t e screws a
m the sig
aching th
.
fan to the isplay.
ver above p dure to tall a n an.
S ral In ction
ly i signs a
und ro
lly to
heck
k paint
ners an
possib
hten o
rrosion
lace as
eciall
ired.
T eshoo g
sympto hat ma encoun with B-101 eries d .
ded. Th include ry pos proble t doe resent
comm ituatio at may ur.
em Pos olu
e lamp · t lam ckets ires.
Visual
nspect nnua chec and le co , esp y at footings, structural
tie points and gro ds. C faste d tig r rep requ
4.12 roubl tin
This section contains some
ms t y be tered the A 0 S isplay
Possible remedies are provi is list does not eve sible m, bu s rep
some of the more on s ns th occ
Probl sible S tions
Singl s do not light Inspec ps, so and w
· Switch the nine-pin Mate-n-Lok plugs controlling that
column on the driver. If the problem moves, the driver is
defective and needs to be replaced.
ps stay lit on both faces · Switch the plugs on the Lam driver. If the problem moves, the
driver is defective and needs to be replaced.
Colu n.
· Check the breaker in the panel board.
mns do not light correctly · Check the common (black) wire to the colum
Troubleshooting