Tru-Test DAS WOW2, Service Manual

Page: 12 / 38

EziWeigh5i, EziWeigh6i, EziWeigh7i, WOW2, DAS WOW2
Issue 2, 7/2017 12
Troubleshooting
Symptom Possible Fault Action
Indicator does not
switch on. Battery fault. Check battery voltage – if < 2.7 V, try recharging for at least
ten hours. If the battery voltage has not risen above 3.3 V
then replace battery.
Faulty power
adaptor. Check using a known good power adaptor. Replace if faulty.
Faulty
power/communic
ation connector
and FPC Check that the power/communication FPC is correctly
inserted into the PCA.
Plug a known good power/communication connector and
FPC into the PCA and check if the indicator switches on.
Poor keypad
connections. Check if keypad FPCs are inserted correctly and locked into
place.
Keypad fault. Unplug existing keypad FPCs and try plugging in a known
good keypad to verify any fault. Replace keypad if faulty.
See page 28.
Faulty PCA. Replace PCA. See page 31.
Indicator switches
on but does not
stay on. Firmware fault. If possible, update the firmware. Refer to the Technical
Bulletin
Updating the firmware.
Low battery. Check battery voltage – if < 2.7 V, try recharging for at least
ten hours. If the battery voltage has not risen above 3.3 V
then replace battery.
Battery not
charging. Battery fault. Check battery voltage – if < 2.7 V, try recharging for at least
ten hours. If the battery voltage has not risen above 3.3 V
then replace battery.
Faulty
power/communic
ation connector
and FPC Check that the power/communication FPC is correctly
inserted into the PCA.
Plug a known good power/communication connector and
FPC into the PCA and check if the indicator charges.
Faulty power
adaptor. Check using a known good power adaptor. Replace if faulty.
Faulty PCA. Replace PCA. See page 31.
Short battery run
time. Battery not fully
charged. Try recharging for at least ten hours. Check that the
charging indicator on the 7 segment LCD is cycling.
Faulty battery. Measure open circuit voltage on battery. Replace if < 2.5 V.
Faulty PCA. Replace PCA. See page 31.
Sections or all of
LCD not working
OR
Very dark or very
light LCD screen.
LCD FPCs not
connected
properly. Try reconnecting the two LCD FPCs. See page 22.
Faulty LCD Replace LCD. See page 33.
Faulty PCA. Replace PCA. See page 31.
Black / Blue / Grey
area on LCD. Cracked or
damaged LCD. Replace LCD. See page 33.