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#32
07-31-2024, 09:22 PM
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=^-^= Yasashii yoru ni hitori utau uta. Asu wa kimi to utaou. Yume no tsubasa ni notte. いとおしい人のために 
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#33
07-31-2024, 09:28 PM
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Yes the solder joints in the HV cage do look terrible so I'll go through them tomorrow. I don't like soldered in fuses much. I'll add a fuse holder for the 0.25 amp fuse as well. Headed for bed. Thank you guys so much. We'll get it run down.
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#34
07-31-2024, 10:38 PM
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one side of the horizontal part of the yoke goes to the plates of the damper tube, the other goes to a power point same as the focus coil it look like.
__________________
=^-^= Yasashii yoru ni hitori utau uta. Asu wa kimi to utaou. Yume no tsubasa ni notte. いとおしい人のために
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#35
08-01-2024, 08:51 AM
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Yeah the RCA schematic for the 240 is drawn out differently than the Sams. The fuse is directly in line with the yoke and pin 6 on the 5V4 is on the other side. I also ohmed it out from the focus control. I got 13.5 and 15 ohms from multiple places and I doubt a reading that close to the actual value from 2 spots is a coincidence. But with my luck, it could be! I need to get into the HV cage and do a complete service. Haven’t done anything in there yet. Need to resolder and clean and check values.
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#36
08-01-2024, 05:43 PM
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Gettin' Closer
OK, I know why there's no horizontal deflection. It grew out of working with multiple schematics from various models, direct replacement of capacitors in the chassis, value for value, and confusion regarding the Sams chassis photos of the bottom.
This chassis had a number of those weird caps in it...not waxies but almost like a cylindrical ceramic with coding stripes, in fact, they look like giant resistors only light in color. I can't replace these value for value because I can't read them (color blind). I depend on the sams photos to identify color coded stuff like this. The problem with the horizontal yoke is that one side isn't connected. If you look closely at the picture, you can see the thick yoke wire attached to the highest lug of the bottom terminal strip. There was one of those funky caps attached to it running down into the terminal strip that has the large 0.47uf cap soldered in. The sams photo does not have the cap I cut out pictured.  You can see the yoke lead soldered to the terminal but there's nothing attached to it after I cut out the mystery cap Here is a wider view. The striped lead running horizontally across the center goes to the yoke. The large diameter yellow modern cap is the 0.47uf I put in to replace another large old cap...but not the one I previously cut out. It is C199 in the schematic down at the end.  Here is the section of the schematic I'm using. The sams is depicted so differently.  So, I need to connect the yoke lead to something. Like I said, someone has been in here before so I'm not sure what I saw when I opened it was what rolled out of the RCA factory. The other side of the horizontal yoke is connected in the HV cage fine.
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#37
08-01-2024, 06:15 PM
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so that must be the .047 cap on the RED/BLACK wire to the fuse line that is missing, it gets hit pretty hard, not sure what DC rating is called for, must be rather high.
this is prob overkill. but.. 598-474MWR102K mouser part.
__________________
=^-^= Yasashii yoru ni hitori utau uta. Asu wa kimi to utaou. Yume no tsubasa ni notte. いとおしい人のために
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#38
08-01-2024, 06:49 PM
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Those caps you describe are simply paper caps inside plastic like bumblebee caps.
I'm confused - you say the .47uF cap pictured is C199? This is the one that connects to the yoke. What do you have it going to?
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#39
08-01-2024, 07:04 PM
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There are two .47, 200v volt caps in this set. C190 and C199 in the RCA service info. One is used for AGC the other is for the yoke .
Check out the RCA wiring diagram. C199 is located in the middle at the bottom. The yoke connects on the left side of C199 
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#41
08-01-2024, 07:11 PM
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Yeah, i was a bit perplexed too, not sure if the cap in question is just missing, or just in the wrong place.
 I'm just a bit surprised it got any HV without it! 
__________________
=^-^= Yasashii yoru ni hitori utau uta. Asu wa kimi to utaou. Yume no tsubasa ni notte. いとおしい人のために
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#44
08-01-2024, 07:25 PM
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That's weird. The one I posted is specifically for this model too - KCS28B model 9TC240
Last edited by bandersen; 08-01-2024 at 07:28 PM.
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#45
08-01-2024, 07:26 PM
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Linear Mode
