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Question
Joseman
Good morning!
i've a chassis hantarex MTC9110 that drives me crazy. I've tried all before ask, but i'm out of ideas.
The problem is that adjusting the variable resistor RV4 (H.AMP) the monitor does nothing, i explain:
Two years ago i changed all the electrolytic capacitors, flyback and, ignoring the advices, i changed all the transistors that are in the heat sink area.
ok, the chassis worked like a charm, top image quality.
After that i set puzzle bobble on the machine to play with my girlfriend.
One day, we turn on the machine and all good, but i leave to my room half an hour and when i returned to the machine, the display was shrunk horizontally to a tiny size.
I opened the machine and the first failure was the ventilator that cools the heat sink zone, it was stopped. I fix that and leave the machine off for weeks, till 4 days ago... to try to repair it.
However i didn't succeed, i read dozens of threads about the subject, and started changing components, i gave it back all the old transistors, changed the flyback. and some many other things.
What i made till now:
-tried 2 monitors.
-changed the variable resistor board (2x), where RV4 goes.
-changed the flyback.
-changed the TDA1670A
-changed diode D5 and C9 capacitor (i read it somewhere)
-changed the BDX53A
-changed the BU508A
-changed B3 Coil
-changed BC558B (tr16)
-changed C42 capacitor.
and NOTHING, the same problem
I uploaded photos of the problem (sorry for the quality but i think is enough to see the problem):
This is the tiny display, this display stays this way till RV4 is amost to the top-left:
http://i68.tinypic.com/110dvko.jpg
if i set the resistor to the left, nothing happens till almost the end, then the display goes like this(tries to open starting from the middle):
http://i68.tinypic.com/2djniit.jpg
and if i set to the left totally, the displays totally open but the imagen is out of boundaries!
http://i68.tinypic.com/2hrde7s.jpg
I really need help, i don't know what to do right now with the problem.
Thankyou for all the advices!!
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