BenQ March Service Manual page 80

BenQ
c) U3 or U1 is at
fault
13. Can' t a) Battery or charger
charge is at fault
b) Components shift 5. Disassembly to visually inspect the J1.
1. If check the b steps and the TPSIM1,
TPSIM2, TPSIM3 or TPSIM4 is still no
signal, maybe the U3 or U1 is at fault.
2. Replace the U3 then re-check the step
b.
3. If it is still no signal, replace the U1.
2. Use the correct battery and charger to
check the charge function.
3. If charging function is ok, the battery or
charger is illegal.
4. If it still can' t charge, proceed to b
If the pins of the power jack (J1) aren' t
contacted well with the pads of the
PCB, re-solder the pins.
6. Visually inspect the R60, C55, F1, R68,
R62, R63, R65, C47, R70, R64, U16,
U17, D1, R24, D15, C48, R66, R67 and
U18. If any component isn' t contacted
well, replace the components.
7. Visually inspect the polarity of the U17,
D1 and D15. If any component is
wrong, replace the component.
8. Check the F1. If it is open, replace the
F1.
9. If they are not wrong, proceed to c
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Rev 1.0