GIGABYTE GA-H61M-S2 DEAD
Posted: Sun Jun 18, 2017 5:04 pm
PROBLEM:GIGABYTE GA-H61M-S2 DEAD
STEPS:
FIRST CHECK 37.768 KHZ CRYSTAL OSCILLATION
FOUND NO FREQUENCY ON CRYSTAL
CHECK 3 VOLT ON CMOS BATTERY- BATTERY OK
CHECK VOLTAGE ON D2 DIOD ON PIN 1 WHERE 3 VOLT POWER IN COMING FROM CMOS BATTERY THROUGH ONE RESISTOR
FOUND ON PIN 1 OF D2 DIOD WAS ABSENT
PUT ONE JUMPER FROM CMOS BATTERY RESISTOR TO THE PIN 3 TO DIOD D2 AND PLACED ONE DIOD BETWEEN THE JUMPER.
THE PIN NO.3 OF DIOD D2 IS DIRECTLY CONNECT TO THE PCH RTC SECTION
NOW CHECK THE FREQUENCY ON DSO
JOB DONE , GOT 37.768 FREQUENCY AND BOARD WORKING FINE
STEPS:
FIRST CHECK 37.768 KHZ CRYSTAL OSCILLATION
FOUND NO FREQUENCY ON CRYSTAL
CHECK 3 VOLT ON CMOS BATTERY- BATTERY OK
CHECK VOLTAGE ON D2 DIOD ON PIN 1 WHERE 3 VOLT POWER IN COMING FROM CMOS BATTERY THROUGH ONE RESISTOR
FOUND ON PIN 1 OF D2 DIOD WAS ABSENT
PUT ONE JUMPER FROM CMOS BATTERY RESISTOR TO THE PIN 3 TO DIOD D2 AND PLACED ONE DIOD BETWEEN THE JUMPER.
THE PIN NO.3 OF DIOD D2 IS DIRECTLY CONNECT TO THE PCH RTC SECTION
NOW CHECK THE FREQUENCY ON DSO
JOB DONE , GOT 37.768 FREQUENCY AND BOARD WORKING FINE