hp 15-ay167sa (la-d707p rev:1) no 3.3v/5v ld03/ld05

scobay

Вложение:

RT8243A pic.jpg

Hi can anyone tell me the values of these resistors marked in the picture please I am gettin 19v on pin 11 and 4.7v on pin 12(enldo). Its RT8243A.

No 3.3v/5v LDO voltages
Many thanks

armagon

from a similar scheme:

scobay

Thanks will check out, can you tell me the name of the schematic that is from.

siberian

if ENLDO = 4.7V, then you need to measure the resistance at the outputs of the LDO

scobay

siberian писал(а):

if ENLDO = 4.7V, then you need to measure the resistance at the outputs of the LDO

Hi pin 14 = 15 ohm
pin 15 = 30 ohm

4.7v on pin 12 wold be correct due to resistor divider.

armagon

Compal NM-A181
shematic

siberian

scobay писал(а):

Hi pin 14 = 15 ohm
pin 15 = 30 ohm

I hope you take measurements with a completely de-energized board?
If so, then take off RT8243 and try again...

scobay

Yes that measurement is with RT8234 removed .

siberian

then apply for the LDO bus, respectively, 3.3 and 5.0 volts from the laboratory source and see what is heating up

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hp 15-ay167sa (la-d707p rev:1) no 3.3v/5v ld03/ld05

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