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Only for training and service purposes
4. TROUBLE SHOOTING
ʹΠΡΪΣΚΘΙΥ͑ι ͣͨ͑͡͡ͽ͑ͶΝΖΔΥΣΠΟΚΔΤ͑͟ͺΟΔ͑͑͟ͲΝΝ͑ΣΚΘΙΥ͑ΣΖΤΖΣΧΖΕ͑͟
ΟΝΪ͑ΗΠΣ͑ΥΣΒΚΟΚΟΘ͑ΒΟΕ͑ΤΖΣΧΚΔΖ͑ΡΦΣΡΠΤΖΤ
ͽͶ͑ͺΟΥΖΣΟΒΝ͑ΆΤΖ͑ΟΝΪ
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4. TROUBLE SHOOTING
CHECKING FLOW
START
Is the connection of
CN501 with LCD connector ok ?
YES
NO
Reassemble LCD connector
NO
Check the Voltage Level of
TP1 is about Battery voltage ?
(LCD_BL_EN signal
is high Level)
NO
YES
YES
Check the Waveform of
EMI filter( TP3, TP4, TP5) ?
Resoldering or Replace U500
NO
Resoldering EMI filter.
(FL500,FL501,FL502)
Does LCD work
properly ?
Replace LCD module
LCD working well !
YES
Is the connection of
CN501 with CN100 connector ok ?
YES
NO
Reassemble FPCB
with Main connector
NO
YES
Check the Waveform of
Data pins on CN100 ?
Replace Main FPCB