Elo TouchSystems ET17 XXL Series Service Manual page 55

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Check the 3.3V power are supplied on I003 pin 2(schematic of power BD)
NG
OK
Is a dot clock being outputted under the
condition that a LCD module is
connected to FB316 pin 2?
OK
Check the H-sync pulse of negative
polarity is output on RN301 pin8 at TTL
Level.
OK
Check the V-sync of negative polarity
are output on RN301 pin 7.
OK
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Check if the voltage on I003 pin1
that is high level DC at 5V
NG
OK
Failure point
I003 Failure
NG
NG
NG
-
52
Check if the voltage on I001 pin1
that is high level DC at 12V
Failure point
I001 Failure
Failure point
(1) I303 failure
(2) Printed wire broke between I303
and FB316 pin 2.
Failure point
(1) I303 failure
(2) Printed wire broke between I303
and RN301 pin 8.
Failure point
(1) I303 failure
(2) Printed wire broke between I303
and RN301 pin 7.
-
Check 12v
NG
adapter
OK