i can´t found +3.3v run

[marcelofct]

hello guys i need your help with tis problem , i tried yo repair my motherboard
DAJW8CMB8E1 REV E all voltages are ok 3.3v always , 5v always , bios 3.3 v etc , but 3.3v_run is my problem i don´t know where 3.3_run is generated and ii need it for turn on the motherboard

please help me with this i leave the schematic any advice will be nice

[KvnTM]

Re: i can´t found +3.3v run

Theres no 3.3_run in the schematic.
Where do you measure for 3.3_run ?

EDIT: You mean +3.3V_RUN ? Always make sure to post the correct names.
EDITEDIT:

+3.3V_RUN derives from +3.3V_ALW and is switched by PQ10.
Measure voltage on Gate, Source & Drain on PQ10.

[marcelofct]

Re: i can´t found +3.3v run

Theres no 3.3_run in the schematic.
Where do you measure for 3.3_run ?

EDIT: You mean +3.3V_RUN ? Always make sure to post the correct names.
EDITEDIT:

+3.3V_RUN derives from +3.3V_ALW and is switched by PQ10.
Measure voltage on Gate, Source & Drain on PQ10.

thanks for your help but i have in drain +3.3V_ALW but i don't have voltage in gate
in PU6 i don´t have voltage on pin 1, 2 ,3 , 4 and driver 1 , 2, 3 ,4 on the others pins i do have voltage !!1 i can´t explain why


sorry my english i´m a beginner form chile
please help me again

[Techtiger]

Re: i can´t found +3.3v run

You have to test pin 100 123 U23 IC for out put Voltage

[marcelofct]

Re: i can´t found +3.3v run

You have to test pin 100 123 U23 IC for out put Voltage

already checked and nothing , i press de power button blink the light and turn off

[Techtiger]

Re: i can´t found +3.3v run

ok now you have to check SIO (U23) as you prees the power button
pin 80
pin 19
pin 76
pin 13
pin 124
pin 14

with out pressing pwr button

PIN3
PIN 112
if RSMRST not rising up the fault is in BIOS

[marcelofct]

Re: i can´t found +3.3v run

ok now you have to check SIO (U23) as you prees the power button
pin 80
pin 19
pin 76
pin 13
pin 124
pin 14

with out pressing pwr button

PIN3
PIN 112
if RSMRST not rising up the fault is in BIOS

pin 80 = 0.0 v
pin 19 = 0.0 v
pin 76 = 2.6v when press the pwr button nothing happend
pin 13 = 0.0 v nothing
pin 124 = 0.0v nothing
pin 14 = 3.2 v press pwr button nothing happend same voltage

with out pressing pwr button

PIN3 = 3.12v
PIN 112 = 0v

in bios i have 3.3v on pin 1 and pin 8

stay tuned

[Techtiger]

Re: i can´t found +3.3v run

Make sure RTC_CELL is crossing R119 R405 and also +3.3V_EC U23 pin 26 75 , there’s no communication between SIO & BIOS chip that’s why the BM dead condition save the old dump and flash bios

[marcelofct]

Re: i can´t found +3.3v run

Make sure RTC_CELL is crossing R119 R405 and also +3.3V_EC U23 pin 26 75 , there's no communication between SIO & BIOS chip that's why the BM dead condition save the old dump and flash bios

what do you mean crossing R119 R405 and pin 26 75 ? i think you mean continuity am i right ? if was that i´ll try it

[Techtiger]

Re: i can´t found +3.3v run

Make sure RTC_CELL is crossing R119 R405 and also +3.3V_EC U23 pin 26 75 , there’s no communication between SIO & BIOS chip that’s why the BM dead condition save the old dump and flash bios

Just check 3.3V RTC cell goes to U14E