Samsung YP-U5, Service Manual

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4-12 Samsung Electronics
Troubleshooting
4-1-6 When it does not screen
1
While the screen is turned
on, check if the voltage on C73
measures approx. 13V.
Replace the OLED and check it
again.
No
No
After a recovery
update, does the MP3 player
function correctly?
Faulty display
Is the USB connected
and the MP3 playing?
Yes
Re-solder the faulty elements
or replace them and then check
again.
Is soldering on display
elements normal?
Yes
Are L8 or C73 overheating?
No
Replace the OLED and check the
voltage again.
No
Yes
Replace the faulty elements and
the OLED, and then check again.
Yes
Check again
Check if there is no power or if the
USB is connected correctly.
No
Yes

Refer to wave pattern
image of Fig. 4-4.