Motorola ts907 low hv

[timmy]

Replacement sheet

[Yamamaya42]

if they both match from pins 1-5 then this has gotten very strange THOSE are the pins that matter most.
the resistance between 1 and 5

[timmy]

Are you referring to the .45

[timmy]

Pins 1 and 5 measure 1.6 ohms

[Yamamaya42]

Originally Posted by timmy

Pins 1 and 5 measure 1.6 ohms

on both the new and old?

[timmy]

Originally Posted by Yamamaya42

on both the new and old?

The new flyback 1-5 1.6 ohms same as old one

[timmy]

That one section with the .45 is weird how those coils are configured.

[timmy]

So I guess it’s not a good idea to use this flyback. So I got a line on another new one so I’ll chance another one. The new one that’s no good is a stancor and the one I’m going to get is a thordarson.

[timmy]

I’m not sure why 1&5 would be so important because I do have both boost voltage’s so if those 2 taps were shorted in some way the voltages should be way off at last check 640v was 620v and 770v was 780v that don’t seem to bad but it sure doesn’t explain why the focus circuit is hot even though focus voltage is right and variable via focus coil. And the 66meg stick resistor for focus gets alittle warm as well.

[Yamamaya42]

the AC current path of L42 was the reason for looking at the resistance of pins 1-5

http://suzaku.live-evil.org/L42.jpg

not really sure why it's hot if both FBT match, but this may be related to why the 100k ohm resistor burned in the first place.

[timmy]

Originally Posted by Yamamaya42

the AC current path of L42 was the reason for looking at the resistance of pins 1-5

http://suzaku.live-evil.org/L42.jpg

not really sure why it's hot if both FBT match, but this may be related to why the 100k ohm resistor burned in the first place.

I had a silvertone that burned the resistor also. Is there a possible reason for the hot L42 from either the horizontal centering circuit or hv regulator like a bad cap. The centering boarders pin 5. Other then that would you use this flyback with the specs it has and the donut 585ohms.

[timmy]

C99 shows.25 but what came out was a .5 this shouldn’t make a difference unless I messed up.

[timmy]

Well it’s official I put the wrong cap in c99 I put a .5 in instead of .25 I don’t know if this may cause the L42 issue along with the video issue

[Yamamaya42]

Originally Posted by timmy

Well it’s official I put the wrong cap in c99 I put a .5 in instead of .25 I don’t know if this may cause the L42 issue along with the video issue

Which would have caused the pulses to be 2x higher then they should have been at that coil , you may want to test r136 too.

[timmy]

Lucky I saved all the caps I changed and there is only one .25 400v c99 and that’s the one I put was wrong. Hopefully the L42 will be ok now and maybe I’ll get video because the pulses pass v6.