Samsung Electronics
4-11
Troubleshooting
4-1-5 Cannot Recharge
Symptom
Cannot recharge the BATTERY
Major Checklist
1
Check external input voltage: DC 5V (D300)
2
Check #FULL_CHG PIN (IC300 15PIN)
: HIGH → FULL_CHARGING, LOW → CHARGING
3
Check #CHARGE_STOP PIN (IC300 12PIN): HIGH → STOP, LOW → CHARGING
(after disassembling
the unit) Is the Battery connector
connected properly?
Completion
Yes
No
Yes
No
Does it work
after upgrading to the
latest firmware?
Yes
Disassemble the unit and check if
Battery connector is defective.
Check power at the BATTERY
(single part).
Yes
No
Recheck after replacing the
BATTERY.
No
Replace the BOARD
(needs thorough examination).
Does it work when
the power adapter is
connected?
Cannot Recharge
Refer to wave pattern
image of Fig. 4-5.
1
Check external input
voltage: DC 5V (D300)
2
Check
#FULL_CHG PIN
(IC300 15PIN): HIGH → CHARGING,
LOW → FULL_CHARGING
3
Check
#CHARGE_STOP PIN
(IC300 12PIN): HIGH → CHARGING,
LOW → STOP
No
No
No
Refer to wave pattern
image of Fig. 4-5.
Refer to wave pattern
image of Fig. 4-5.
Yes
Yes
Yes
Summary of Contents for YEPP YP-Q1
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