3
1.1.
Troubleshooting Guide
Use the flowchart below to verfiy a malfunctions of the unit.
1.1.1.
Troubleshooting inspection
㽲
NO
YES
NO
NO
YES
YES
NO
NO
YES
YES
NO
NO
YES
NO
YES
NO
Not power on normally
LEDs light up?
LED (red) lights up
and LED (blue)
blinks?
Failure of Bluetooth module or
IC1102 (3V output OK/NG)
LED (red) lights up
and LED (amber)
blinks?
Failure of DAMP IC (IC1402) or
IC1106 (1.8V output OK/NG)
Power-supply to
USB is OK?
The voltage of
rechargeable
battery is higher
Failure of D1004, Q1102, or IC1104
The voltage for
18pin (IC1000) is
2.5-3.3V?
Failure of IC1105 or D1101
When POWER
key pressed,
IC1000-CKB2
output is LOW?
After re-writing
fairmware, the
power-supply is
Failure of FFC or NFC P.C.B.
or Power Switch
Failure of IC1000 micon
LED (red) lights up
and LED
(amber/blue) and
Failure of DAMP IC (IC1402)
or IC1104
Out of charge or
failure of tbe battery
㽳
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
No sound
Failure of DAMP IC (IC1402)
Failure of the speaker
Coil is damaged
Is there digital
waveform output for
C1403?
Failure of DAMP IC (IC1402) or
IC1301
Failure of Bluetooth module
Is there digital
waveform for the
output of IC1301
6pin, 7pin, 8pin?
Failure of DAMP IC (IC1402)
Check the damage of the
speaker. Connect to another
normally functionning unit.
Sound is normal?
DC 3V or higher at C1472
L1404~1407 are conductive by
measuring the ohmmeter.
Is there audio waveform output
at 13pin and 14pin of IC1301?
㽴
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
Battery not being charged
The voltage of
rechargeable
battery is 4.5V or
Is there USB power
voltage for C1111 in
USB power receiving?
Failure of D1004, Q1102 or IC1104
Failue of rechargeable battery
IC1000 2pin is
LOW?
Failure of QR1102
LED (red) lights up?
Failure of TH1101
Is there SW
waveform for
IC1103 7pin
Failure of IC1103
3V or lower output at
TH101 TEMP DET.
Failure of NFC P.C.B. or FFC not
connected properly or
disconnection of FFC
[Caution]
* For Malfunction of Bluetooth Module P.C.B.
Replace the Bluetooth Module P.C.B. and NFC P.C.B. at the same time with BT/NFC P.C.B. Kit.
* For Malfunction of NFC P.C.B.
Replace NFC P.C.B. together with Bluetooth Module P.C.B. on Main P.C.B. at the same time with BT/NFC PCB Kit
