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b250a-btc v20 no voltage cpu
https://vlab.su/viewtopic.php?f=44&t=111450		 Страница 1 из 1
bokin021 [ 25 янв 2021, 15:40 ]
Заголовок сообщения:  b250a-btc v20 no voltage cpu
Hi i hav problem with cpu voltage without cpu voltage is 0.900 v with cpu 0 ..I flash bios from site and i notice signal on pwm controller rt3606bc en 3.3 but VR eady is only 0.9 v i think should be 3.3 v ..What more i can test?Thanks
Sokol78 [ 25 янв 2021, 23:18 ]
Заголовок сообщения:  Re: b250a-btc v20 no voltage cpu
I think PGOOD (pin 2) should not be 3,3V, it is pulled up to something like VCCSA=1.05V through divider, so 0.9 V is normal in this case. Check the voltage at pin 44, 30, 52. Are you sure your CPU works well and compatible? How about the socket? Look at it through a microscope!
alex68q [ 25 янв 2021, 23:48 ]
Заголовок сообщения:  Re: b250a-btc v20 no voltage cpu
Похожая схема MS-7A74 есть в : viewtopic.php?f=239&t=346&p=496267&hilit=%2AMS+7A74%2A#p496267 , VRM_PGD_R подтянут через 1ком к VCCSA .
bokin021 [ 26 янв 2021, 10:32 ]
Заголовок сообщения:  Re: b250a-btc v20 no voltage cpu
Cpu is ok support board also socket is ok no pins are damage or bad position..When cpu is removed voltage are 0.8v wirh cpu is 0V ..I did not understand what voltage should be on vready..
aleksros [ 26 янв 2021, 11:09 ]
Заголовок сообщения:  Re: b250a-btc v20 no voltage cpu
bokin021
flash bios
check for broken smd elements
change hub
bokin021 [ 26 янв 2021, 16:46 ]
Заголовок сообщения:  Re: b250a-btc v20 no voltage cpu
On hab coming 1.1v does not get worm..No brocken smd at all i have check well..Maybe can be damage pwr contropler for cpu..I will resarch more..
bokin021 [ 27 янв 2021, 13:08 ]
Заголовок сообщения:  Re: b250a-btc v20 no voltage cpu
44 3.190 v
30 1.1 v
52 12 v
Sokol78 [ 27 янв 2021, 13:37 ]
Заголовок сообщения:  Re: b250a-btc v20 no voltage cpu
bokin021 писал(а):
44 3.190 v
30 1.1 v
52 12 v


Is that without CPU or with CPU?
bokin021 [ 27 янв 2021, 13:54 ]
Заголовок сообщения:  Re: b250a-btc v20 no voltage cpu
with cpu
Sokol78 [ 27 янв 2021, 14:10 ]
Заголовок сообщения:  Re: b250a-btc v20 no voltage cpu
Pin 30 is VCC, it should be 5V! Otherwise PWM controller will not start working! Try to find out where it came from! Have you got the scheme you were told about above?
bokin021 [ 28 янв 2021, 15:14 ]
Заголовок сообщения:  Re: b250a-btc v20 no voltage cpu
i have change 2.2 ohm resistor 5 v it is but no cpu voltage
Sokol78 [ 29 янв 2021, 15:32 ]
Заголовок сообщения:  Re: b250a-btc v20 no voltage cpu
May be on your motherboard somewhere is two pin jumper for starting without CPU? And you can start the motherboard without CPU only when this two pin closed? So, in order to start the motherboard with CPU you need to disconnect them!
bokin021 [ 29 янв 2021, 16:05 ]
Заголовок сообщения:  Re: b250a-btc v20 no voltage cpu
no this jumper but when i remove cpu voltage is 0.9v
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