Main > Monitor/Video Forum
Pentranic 1132 (CH-288) No Picture & Chirping - [FIXED!!!!!!]
Arm123:
Tonight i checked r513, C511, C512, d501 and all is well with those components.
Heres hoping i have some success ;D
gokun:
Well, apparently my luck seems to be changing...the guy in town that I found is going to cross reference the remaining parts for me(or get me the exact ones if possible) so I won't have to worry about wrong parts anymore hopefully. :)
Also, Rick has very kindly offered to help me out(take a wild guess where I'll be getting my next monitor when the time comes^_~) so between the two I should have everything I need to finish this up.
I'm still convinced I put the wrong resistor on that sub power board as that is exactly the part that blew out...just my luck it got hot enough to fry some stuff around it too...crappy radio shack carbon resistor! (or crappy repairman-take your pick-lol!)
So I'm very hopeful that once I fix the sub power board it will fire back up again. Obviously I can't be 100% but it seems promising...anyways, should have most of what I need on Friday(the IC may not be in until next week) and once I make the fix will post another update...
In the meantime I have yet another question...just because I'm paranoid now...
would it hurt anything to use a much larger resistor? As in would it work properly that way or would it not?
Reason I ask is I have some pretty heavy duty ones leftover from another project and I was thinking maybe using one of those if it would work ok...but they are MUCH bigger resistors so I'm not sure...I've done it on some (non-monitor) boards and it's fine, but on others not so much....so what do you guys think? TIA!
grantspain:
depending on the circuit as some resistors act as safety resistors
for example hantarex use anti flame safety resistors,if you don't use the same type and wattage you can actually get a fire :o
this when you need to check schems and get like for like-same watts,same ohms,same type
Arm123:
Well... I tried to fire up my Pentranic after make my mods and it didn’t work :( Still, same chirping.
I put my ear to the chassis and the chirping seems to be coming from the top right of the board. Where the FET and sub power board are located.
Since i still have not replaced the FET transistor, i think ill do that and check on a few other components in that area.
gokun:
[UPDATE 2]
Well, after getting a new resistor which is much more manly, as well as a couple other parts I was waiting for, I figured I would give it another shot...so I put everything back together and cut it on and...
No Chirping!
but now I'm blowing the main fuse! ::) it does have a pretty greenish flash though :P
anyways, I think I'm gonna replace the FET for this one....does that seem like the obvious choice to anyone else?
could it be my new "manly" resistor? it's a metal 50w and I believe the other was 1/2W or so(both are 270k)...
too big? I'm thinking it's fine probably but always like knowledgable opinions from the experts since I'm still learning and all...
So, yeah, I'm thinking the FET like Arm...opinions?
Oh, and btw Arm, I think I have an extra IC2 if you need one let me know and I'll double check for ya.