Samsung YEPP YP-S2, Service Manual

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Samsung Electronics 4-3
Troubleshooting
Does the
Start key operate normally?
(If pressed does the
LED light up?)
A B
Is the Reset Port on
High? C40 → 3V
After
connecting the USB, is the
device recognized
by the PC?
If you
press the Play key
and the DNSE key (replay
mode) at the same time and
connect the USB, is it
recognized as a DFU
device?
Replace BOARD
(Requires close inspection)
Go to “4-1-5 Button does
not operate” flowchart
No
Go to “4-1-5 Button does
not operate” flowchart
No
Update the firmware and
recheck
Yes
Update DFU firmware and
recheck
Yes
Yes
Yes
No
No

Refer to wave pattern
image of Fig. 4-5.