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NHL-4/4U
Troubleshooting Instructions
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Start
Battery bars are
working (scroll)
No
Measure voltage
over V100
(TVS).
Is it > 3.0V?
Yes
Read BTEMP value.
Compare it to ambient
temperature.
Is it ~25C?
Yes
Measure charger
current throug F100.
Is it ~350...390mA
(with ACP-7)?
Yes
Retest
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Yes
Check X102, F100,
No
L100, V100, C106, C110
and line.
Check X100, C100,
R202, R207, C220
No
and line. Are they
OK?
Check R200. Is it
No
OK?
No
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Retest
Change defect part (if
any), re-calibrate charge
current/voltage. Retest.
Re-calibrate BTEMP with
Yes
Phoenix SW. Retest.
Change defect part,
No
re-calibrate and retest.
Yes
Change UEM
Change defect part,
re-calibrate charge
current/voltage. Retest.
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