4-6
Samsung Electronics
Troubleshooting
4-1-4 If the button doesn’t work
1
Is the voltage on R14 between
0.9V and 1.0V while the button is
being pressed?
Does the power button on the
PCB work when pressing it?
Check that the resistance
is R14=1KΩ and R90=100KΩ.
Is the soldering done correctly?
Repair or replace the knob key and
check it again.
Repair the elements and check it
again.
Replace the board
(Detailed inspection is required.)
No
Yes
No
Yes
No
Faulty power button
Yes
Refer to wave pattern
image of Fig. 4-2.
Summary of Contents for YP-U5
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