Samsung YP-U5, Service Manual

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4-2 Samsung Electronics
Troubleshooting
4-1 Checkpoints by Error Mode
Oscilloscope Setting Values Normal Voltage 32.768KHz
Voltage/DIV 1V or 2V 0.2V
TIME/DIV 20ms 10us
4-1-1 If there is no power
Connect the
MP3 player to a PC and
charge it for 10 minutes, and
then check if the power
is turned on.
After completing the recovery
update, check it again
No
No
No response on the display even
when pressing the power key.
Does the PC
recognize the MP3 player
when connecting and
resetting it?
Yes
After resetting,
does the PC recognize the
MP3 player through a
recovery update?
Yes
Yes
No
Yes
Complete
No
1
Is the voltage on the battery
above 3.5V?
Yes
Yes
Is the power button faulty?
(See “Faulty Button”)
No
Replace the board.
(Detailed inspection is required.)
Power turns on, but it stops
after pressing the power key.
No
No
Yes
After repairing the USB, check
it again. (See “USB Failure”)
Complete
Replace the battery and check
the voltage again.
Repair the faulty power button
and check it again.
(See “Faulty Button”)

Refer to wave pattern
image of Fig. 4-1.
Is the USB
incorrectly connected?
(See “Incorrect USB
Connection”)
Charge
the MP3 player by
connecting to the PC for 10
minutes and check if the
voltage on the battery is
above 3.5V.