need help with backlights T20s [Archive]

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SVH

07-22-2003, 20:14

backlights dont work
keyboard/backlights layer is ok
i measured voltage between half-round contacts - generaly nothing
but between ground and any of contacts is about 0,6v
voltage suppliyng from small chip (is it driver?) near the charging components
is it driver fault? or can i check this?
thanx
br

mandu

07-22-2003, 22:53

first change light pad , if same problem change N750 (small ic )

ARS

07-23-2003, 04:16

ELF .... backlight of T20, T28...etc are using high voltage and high frequencies.....hard to measure....change the ELF, or try to change driver... 8 legs IC near chargin circuit...but in most cases is problem just coil...