help for Trinitron kv-m1430a Dead

[bigboss80]

Originally Posted by zeno

Be sure you are using the right ground. There is a hot ground
in primary & cold ground for secondary voltages.
If you can put up the power supply schematic alone I may
be able to help more, its to small to read.

73 Zeno
LFOD !

Hi, I thank you, I replaced all the electrolytics on the primary , and since I found the diodes bridge so much to remove my doubt, then I managed to find on another circuit I also have resistance from 3.3ohm 10 w, but just current the resistance is jumped immediately, I tried to measure the heads of R601 and there are 240V, I can't understand, there is a short circuit somewhere that puts R601 in parallel to tension of network . Whether it's all the fault of the str, the strange and that only Zener D611 jumped at the beginning.

This scheme should be more detailed

https://drive.google.com/file/d/1BPc...ew?usp=sharing

Service manual

https://drive.google.com/file/d/1RHf...ew?usp=sharing

[zeno]

Use the neg end of bridge for ground. It looks like they used cold ground
for the voltages !
R601 just to limit inrush current while big filter cap charges.
First be sure there are no shorts on the 3 secondaries The
120 V is most likely.
R602 & R607 give IC a kick start. If you dont get neg feedback to
that pin IC will blow. Open resistors will give "dead set"
R609 & R628 are the low end ( E ) of the IC's output. Over current will be seen here if a short on chassis & shut down the IC.
If IC isnt blowing you can monitor to see if IC is trying to start etc.
Unplug the DGS coil so it wont confuse you. Let us know how you do !

good luck
Zeno
LFOD !