riddler
New member
I have a Hantarex Polo 25 that continously blows C125 470UF 35V cap. The monitor will turn on and I can hear high voltage but within 10 seconds the cap blows. Anybody know what is causing this and what should be replaced?
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Yes the cap is being installed correctly. I matched the black dot to negative on the cap. I also checked my other chassis to make sure that the board marking was correct and the cap was installed correctly.
I did remove D118 & D119 to check them. They tested .467 on one and the other .455. I made sure they did not test the other way and only shows one on my meter. I checked on my other chassis to make sure they were installed correctly. Both have the negative line on the diode facing towards the board.
I set my meter on ohms to 2M. I put the negative wire on the chassis metal ground and put the positive lead to the blown C125 cap. It reads .221 and drops as I hold the posistive lead on the positive side of the cap. I tested this in circuit.
I checked and I can't see anything shorting underneath. I have taken some pics but do not know how to post them on here.
When you say an external DC do you mean like 12 volts to the positive side of the cap? And I guess it should be a new cap in place when I try this test?
I replaced C125 and removed the vertical ic. I applied 12 volts to the positive side of cap C125 while I had my meter on the 12 volt line and ground. My meter stayed at a constant 12.23 with no fluxuation. The cap did not burn up either.
How do I check C122 & C124 are shorted? Do I do that on the continuity test on my meter. Can they be tested in circuit?
I found a 3rd Hantarex Polo 25 that is missing the Flyback and after blowing out some dust I can see that the Diodes D117 & D118 are going the same way.
Im really got at shotgunning but not so good at testing.
I really appreciate all your help Ohmerone
Hello Ohmerone,
I just want to make sure I have this right before testing the cap. You want me to change the cap to a 470UF 50V instead of the 470UF 35V that is in there.
Leave the vertical IC out and plug the chassis into AC Power.
Measure DC voltage on positive lead of C125 the 470UF 50V.
How do I tell if the V101 is set wrong? I see it on the board. It is a square blue pot with a white adjustment. I have never messed with it but I bought the game broken. Somebody before me could have messed with it.
What about the red annode wire? What do I do with that while testing? Should it be plugged into the tube?