Main > Monitor/Video Forum
hantarex polo 28 blows fuse
perjmolsen:
A new picture of the back pcb after I have cleaned it up and touched the solder points up.
Have i miss anything?
perjmolsen:
Clearly I must have a short somewhere at the TP6 line... :dizzy:
Therefore I desordeled the new flyback completely, and removed it from the chassis, and removed the HOT (BU508A)
Now i have an OL between chassis and TP6 :applaud:
And when i put the bulb between flyback pad (leg3) and chassis I get the bulbs ohms reading at 102.9 ohms - so thats all good..
BUT still fluxing volts when i test B+ :banghead:
Neckboard and yoke are connected to the monitor when testing
Have also tested with a new HOT in place, still OL in ohms reading and tp6 when bulb is disconnected.
If I turn the bulb out of its socket for a couple of seconds the volt rises to 90V but drops when i turn the bulb back in in order not to blow something up.
(If the bulb is disconnected for a long time the D116 gets hot and blow up)
So is it my transformer.. even that I am unable to measure some shorts between the coils, but if it where the transformer in my opinion, it would not be able to produce 90V without load..
perjmolsen:
Close up at the back pcb - zener diode connection to transformator
I "think" that the two pads needs to be connected. When i remove the zener diode at do a connectivity test with my multimeter, there still are connectivity to the pad at the transformator.
The is missing a bit of one pad - where the one end of the 16 zener diode is solder in.
princess prin prin:
The zener is connected to the gate of the mosfet and ground (the half ripped pad). The damaged pad is not to be connected to the pad next to it.
perjmolsen:
Okay... well grantspain sad the same.. ;D
Then I have to figure out why I get connectivity between the pads even with the zener out of its hole...hmm
I must say that both you and Grantspain know laot about chassis repair... THANKS for you help :)