Main > Monitor/Video Forum
Hantarex MTC900e - white screen
CathalDublin:
It’s 217.
Edit: actually I should be testing DC? I’ve my meter set to AC.
So that’s 138v b+
12v is bang on 12v
And I’ll need to retest my -5 tomorrow 🤦🏻♂️
grantspain:
yes dc volts
set your b+ to 126vdc by adjusting RV12
test the video b+ at SP4 neck card- should be around 190-200vdc
test the -5 at SP7 neck card
CathalDublin:
I’ve my b+ Dialled in at 126v now, and at SP4 it’s about 215v
My 12v is stable at 12v
But my -5v is reading 7.5v
grantspain:
check the following
c25, c83, c36- replace in any case
all diodes around that area
ic1 7905 -5v regulator
the input to ic1 should be 12v