Re: VX 724 black screen green light flashing
OK, found it, and also replaced before killing the SMPS ic....
Announcement
Collapse
No announcement yet.
User Profile
Collapse
-
Re: VX 724 black screen green light flashing
I didn't find any capacitor in the startup circuit.. From +V of the main capacitor, there is four 390K resistors in series then to VIN.. and no cap to gnd.
Maybe the SMPS IC was damaged before the blown.....
Leave a comment:
-
Re: VX 724 black screen green light flashing
Damn,.. so CET541 (original mosfet) is not IRF 541......
Leave a comment:
-
Re: VX 724 black screen green light flashing
here a pic of the damaged part.. I think is R628
...
Leave a comment:
-
Re: VX 724 black screen green light flashing
Thanks to both of you
Bad news.. I replaced the mosfet (CER 541) with a IRF 540 and somethin exploded...
I remember that the SG6841 VIN pin was something like 3.2V.... I will try to fix the board and try again.
Leave a comment:
-
Re: VX 724 black screen green light flashing
Hello!! Its been 4 years since last post in this thread...
Yesterday my VX724 died. Started with the power led blinking, and then died. After disassembling I noticed that the main cap had some fluid leakage.. changed the main cap, the 220uF caps and the 330uF caps. The others seems OK.
The main cap is charged but there is no 12v at the output. I disconnected the PSU and disconnected the inverter (opened the jumper 9 that connects +v from 220 caps to +v of 330uf cap)
I checked VIN of SG6841 and it's...
Leave a comment:
No activity results to display
Show More
Leave a comment: