Trouble Shooting - Sanyo NV-E7500 - Navigation System With DVD Player Service Manual

TROUBLE SHOOTING

Is this DC +9.0V connected to the
power supply socket(JK6)?
Is the power supply swich(SW1)turned ON?
Confirm +5V at out of IC2.
Confirm +5V at pin 1 of IC4
Confirm +11V at D22 cathode side.
Confirm +5.1V at DZ6 cathode side.
Confirm +3.4V at DZ7 cathode side.
Refer to [NO IMAGE] [NO SOUND]
Confirm CN1001 is inserted correctly.
Confirm CN1005 and CN4 are inserted
correctly.
Confirm the signal at pin 9,13 of IC1002
Confirm the signal at pin 3 of IC10.
Then check around JK3.
YES
YES
YES
YES
YES
YES
YES
YES
YES
NO
A A
B B
VIDEO
YES
Then turn the Power supply switch ON.
Then check around IC2.
Then check around IC4,Q2,Q3.
Then check around IC43.
Then check around IC42.
Then insert CS1001 correctly.
Then insert CN1005 and CN4
correctly.
Then check around IC1002.
Then check around IC10.
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