Hi guys,
Hope you guys are in good health..
Its been a while since I posted for assistance. Well, currently I am having a bit of problem of locating the faulty component/s of my on-going repair. I hope that someone can lead me the way here.
Monitor Model
Samsung T240. Power board images as attached.
Symptom/Problem
-No power. No Power LED turning on.
Plugged & measured Voltages
- across Big cap = 330V (330V)
No Secondary voltage whatsover
Tracing downstream found that reading of Q101 (FQFP7N65C) are
: D to -ve of Big Cap = 330V
: S to -ve of Big Cap = 0V
: G to -ve of Big Cap = 0V
: G to S = 0V
: Did not measure D to S as stated in the datasheet it is 650V !!!!. I could not afford to destroy my multimeter again.
Unplugged & measured resistances
- across R103 (beside Q101 colored orange-purple-silver-Gold) is 0 ohms (shorted). However, I am doubtful whether this is correct.
Description/what's been done.. or not
- Have not replaced all caps.. yet..
I have trouble also reading the markings on IC101. There are 3 line on it. I could only vaguely see AN7(orV)3X(unreadable). Therefore I could not distinguish the datasheet for it..
So am I on the right path to focus on whether the 2 components, Q101 (FQFP7N65C) & R103 (beside Q101 colored orange-purple-silver-Gold) are the caused of the fault on this Power board?. Or I am missing something else to check on?..
Hope the experts here can guide me along.. Let me know if more readings should be taken.
Thanks again..
Hope you guys are in good health..
Its been a while since I posted for assistance. Well, currently I am having a bit of problem of locating the faulty component/s of my on-going repair. I hope that someone can lead me the way here.
Monitor Model
Samsung T240. Power board images as attached.
Symptom/Problem
-No power. No Power LED turning on.
Plugged & measured Voltages
- across Big cap = 330V (330V)
No Secondary voltage whatsover
Tracing downstream found that reading of Q101 (FQFP7N65C) are
: D to -ve of Big Cap = 330V
: S to -ve of Big Cap = 0V
: G to -ve of Big Cap = 0V
: G to S = 0V
: Did not measure D to S as stated in the datasheet it is 650V !!!!. I could not afford to destroy my multimeter again.
Unplugged & measured resistances
- across R103 (beside Q101 colored orange-purple-silver-Gold) is 0 ohms (shorted). However, I am doubtful whether this is correct.
Description/what's been done.. or not
- Have not replaced all caps.. yet..
I have trouble also reading the markings on IC101. There are 3 line on it. I could only vaguely see AN7(orV)3X(unreadable). Therefore I could not distinguish the datasheet for it..
So am I on the right path to focus on whether the 2 components, Q101 (FQFP7N65C) & R103 (beside Q101 colored orange-purple-silver-Gold) are the caused of the fault on this Power board?. Or I am missing something else to check on?..
Hope the experts here can guide me along.. Let me know if more readings should be taken.
Thanks again..
Comment