Hantarex 25" Polo monitor issues

shardian

New member
Joined
Sep 13, 2007
Messages
8,762
Reaction score
8
Location
Culloden, West Virginia
Okay so I have two Polo monitors that are dead. One is plain dead, the other has flyback sparking. I've only dug into the sparking one, so let's start there. I'll cover the other later this weekend.

When powered up, the flyback emits sparts out of the top. No picture.
-The fuse is good
-The HOT is good.
- Diode D142 and R255 have been literally blown off the board. R157 appears to be suspect, as it is next to these two components.
-The 4 Ohm 10 Watt resistor is suspect. Measuring from the inside of the legs gave me an initial reading of 5.2 ohms. Measuring from the outside game me either 11.5 or had trouble reading. These readings were taken with resistor in-circuit. I need to pull it out of circuit to verify. It is probably being influenced by the circuit.
-Everything else looks good. I did not see any cold solder.

Any thoughts?
 
Flyback sparking = bad flyback.

Yes but in my experience a bad flyback would also mean a blown HOT and a blown fuse. Weird...

Anyways, I pulled the other chassis this morning (the one that does nothing). It has no damage indications at all.

On both chassis:

HOT good, fuse good, all power resistors in spec, all diodes test good.
 
I've ordered flybacks, hot's, cap kits, and those blown components to rebuild both. HOPEFULLY this brings at least one of them back to life.
 
Blown flyback will usually take out other components. I had an arcing polo that all I had to replace was the fly. Nothing else.

you sir, are pretty damn lucky.

I've heard it go the other way on these too. like blown HOT taking out the flyback. which is total bullshit if that does happen.
 
you sir, are pretty damn lucky.

I've heard it go the other way on these too. like blown HOT taking out the flyback. which is total bullshit if that does happen.

Maybe so. I don't like working on Polos. That is the only one that worked after I worked on it out of three...
 
Back
Top Bottom