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Hantarex Polo B+ 164V with flyback connected.. (SOLVED)
perjmolsen:
Hi
Another Hantarex repair....
I have tested my PSU with a 40W bulb at pin3 on flyback, all my PSU volts are OK
B+ 145V (TP6)
TP10 11.2V
TP8 25V
TP9 17V
TP31 28V
But when i connect the flyback (solder pin3) then my B+ is 165V
I have changed C112,C114
IC104 (HOT) is 165V at center leg
Tested that I have 11.5V at IC104 pin1
Tested T113, R219 and R222
perjmolsen:
Update
Also changed flyback to a brand new one, still High B+
Also changed C172,C174,C170,C183 (poly caps) to new, still high B+
Also changed HOT (T114), still high B+
Went back to check the resistors... R222 according to manual 0.51 ohm..
When i test It I get 1.6 ohm.. can it be the issue?
princess prin prin:
If you have b+ at the HOT collector, then you have no horizontal drive. R222 is not open (which would explain the lack of horizontal drive) so I don't think it's where the problem is. Maybe your meter adds some resistance. If you remove the parts coupled to the HOT collector what's the b+?
perjmolsen:
Hi
I do not get it :dizzy:
All my volts are spot on when I use a dummy load.
When i connect the fly (new one) my b+ is 170V
I guess that I am missing my horizontal drive, and it is on IC104 pin3
I have checked all the components marked with green dot.
(C171 330n 630v is not on my chassis)
I assume that my horizontal drive is all the components on pin3 at IC104, IC104 is also replaced with a new IC.
perjmolsen:
It where the TH102 that where bad
Compare it with a working one, the two legs where 27,1 ohm 129.5mH
The bad one where 29pf
The last two legs where 0.00 ohm on both
I have now put in a working Th102 - and my B+ is stable with flyback mounted 145V :applaud:
BUT I have no picture, if I turn the screen volt nearly all the way up, I can see a verry blurry white on the screen, and it is in the center of the screen??!?
It is like the screen volts are all low, and no focus is possible... hmm