Main > Monitor/Video Forum
Hantarex Polo/2 25-28 Dead - how to test B+ (SOLVED)
grantspain:
check th2, should be about 1 ohm one side and 20 ohms the other
chech tr20
perjmolsen:
Hi Grant :notworthy:
I have looked almost everywhere but I can not find TR20... :hissy: :hissy:
I can fin T20... is that the component?
When i test TH2 i get 25ohm at one side and1 ohm at the other side, tested in circuit.
grantspain:
yeah t20, switching for the horizontal drive transformer
perjmolsen:
Hi
Tested the T20 (BF419) tests OK in my tester.
Also tested T19 (bdx53a) tests also OK in my tester.
I have also tested that the TDA2595 gets 12V at pin 15, it get 11.4V
What do i overlook.. :banghead: I do not understand why my B+ is so high when fly is in, and fine when i test with a bulb as load... :dizzy:
perjmolsen:
HUSTON.... WE HAVE FOUND THE PROBLEM :applaud:
I THINK we have a dead resistor...
R156 an 2K2J 7W resistor is OL!
It do not think that I have a 2.2k ohm 7w resistor in my parts boxes.. hmm
Would this 2 ohm 10W resistor be a good replacment?
https://www.aliexpress.com/item/32863720936.html?spm=a2g0o.productlist.0.0.655a55e4LU9R0u&algo_pvid=e40acf40-22f1-41dc-be27-c5a418ebfb45&algo_expid=e40acf40-22f1-41dc-be27-c5a418ebfb45-50&btsid=6440fef2-fdfc-4509-ac91-3d4323bd4548&ws_ab_test=searchweb0_0,searchweb201602_6,searchweb201603_53