Checking The Resolution Change Ic Movement - Elo TouchSystems ET17 XXL Series Service Manual

7.Checking the resolution change IC movement

Is there +3.3V supply on I303 pin 148,144,139,2,20,37,53,67,81,97,111,129,141,146,
150,173,181,187,193,196,164,168,172,160
NG
OK
Is there +2.5V supply on I303 pin 153,155,176,182,188,203,26,88,134,199
NG
OK
Is 24MHz clock input to I303 pin
151,152 at TTL level?
NG
OK
Is +5.0V supplied to I303 pin 5 at
high level (Reset signal)?
NG
OK
Failure point
I303 failure
Failure point
Print wire broke between
I306 pin 4 and I303 pin 5.
Proceed "Checking the DC/DC converter circuit" section.
Proceed "Checking the DC/DC converter circuit" section.
Is 14.318MHz clock output
from X301 pin1,2 at TTL
OK
Failure point
Print wire broke between
X301 pin1,2 at TTL level?
Failure point
X301 failure?
Check the output of 5.0V "H" pulse from I306 pin 4
NG
OK
-
59
NG
Failure point
OK
Print wire broke between
X301 pin1,2 and power
supply
Is 5.0V supplied to I306 pin 5 ?
NG
OK
Failure point
I306 failure
-
Failure point
(1) I001 failure
(2) L004 open