Samsung YP-R1 Service Manual page 28

4-1-6 If the battery is not charging
If the battery is not charging
Is the screen on when
connecting the USB?
Yes
Are the battery FPCB
and the connector connected
properly?
Yes
1
Is the voltage of the battery
above 4.5V? (C801)
Yes
/ /
2 3 4
Check voltage of the battery.
R621 – High while charging,
R618 – Low while charging and
High when fully
charged.
Yes
Change the battery
Samsung Electronics
No
No
No
 See the waveform and
the image in Fig. 4-7.
No
 See the waveform and
the image in Fig. 4-8.
Does it work after
the firmware upgrade?
Yes
Connect the battery FPCB and the
connector properly.
Replace the battery and check the
voltage again.
Replace the board.
(Detailed inspection is required.)
Troubleshooting
No
4-13