Sanyo NV-E7500 - Navigation System With DVD Player Service Manual page 25

TROUBLE SHOOTING
Confirm the signal at pin 2,15 of IC13.
Confirm the signal at pin 2,6 of IC17.
Then check around IC18 and JK5.
Confirm the signal at pin 5,14of IC13.
Then check NAVI BLOCK
(around IC31 and IC32)
Confirm the signal at pin 4,11 of IC13.
Confirm the signal at pin 3,5 of IC15.
Then check around IC2010, IC2011
and IC2013 of DVD BLOCK.
VIDEO
NO
NO
NAVI
NO
DVD
NO
NO
Then check around IC13.
Then check around IC17.
Then check around IC13.
Then check around IC13.
Then check around IC15.
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