I've decided to change the caps on the power supply, I might as well, while I'm there changing the main filter caps. I promise no more till I see if I have a working amp . IF not I might just smash the hell out of it, kidding!
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Very good idea to do that.
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I have gotten side tracked with an electrical job, will get back at it next week. Thanks guys!Comment
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I'm back, started to recap the power supply, have 3 more smaller caps to do, then the 4 larger ones. While I have those large filter caps out, I'll check the components that I couldn't reach. After that is complete, we will test the amp, and hopefully have a perfect working amp. Fingers crossed.Comment
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Hope so!
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Oh, before I forget: Take that protection relay out and check it. Also check the coil resistance.Comment
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OkComment
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I got the first two mainfilter caps pulled, pain in the ass. Who would run wires under a cap. Now my leads on new caps are short. Components are checking out so far. The plate resistors that is. Get back to it on sat. HOLIDAY!Attached FilesComment
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put the wire on the other side of the board if it bothers youComment
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its a dumb design all right.
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Aren’t the new filter caps a bit smaller in diameter? I’d be tempted to relocate some wires.Comment
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I'M going to take a closer look, and see what I can do. I recapped my other KA 701, and don't recall having to do all this. Keep in mind it's a little different. I might just have to relocate a few wires. The caps used were kemet, and I have the Nichicon now. Both are snap in type. I don't think any caps this size or value have longer leads. Yes new caps are just a few mm smaller in width. Definitely in height by a good inch.Comment
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Yes, usually new caps are smaller than the old vintage ones. One amp must be newer than the other one that’s for sure.Comment
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Personally and because I can, I would relocate these wires. I just don’t like wires squished underneath components, can’t stand that. But that is just me and my OCD.Comment
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Hi, I'm seeing one 9V relay having temperature 40C on its 9V (primary) side. Does that seem right? I switched 2 relays on that board and the temperature was the same (on the same position), so I'm sure it's not a faulty relay. I measured voltage on that relay and it was 9.5V DC, so that looks good. I don't see any other relay on that board having that kind of temperature and they have 9V on them too.
I thought maybe the transistor that is switching this relay keeps switching on/off, so I also checked for AC and there was almost none: 0.3V using mV range. No steady frequency was shown, but... -
Hi everyone!
I have this board that suddenly stopped supplying power to an output that drives an interchanger cleaner motor.
I checked while the board was in place with all wires attached and there's no AC voltage on the corresponding plug X5
This X5 is driven by fuse F8 (tested OK) which comes from the second orange relay
To make sure there are no charcoaled contacts inside the relay, I got a 24VDC power supply and got it ready to manually power up the coil side of these relays.
I respected the polarity, positive to cathode of protecting diode
So provided all... -
I was working on this CNC machine today found no keyboard functioning no control relay powering on
The screen powered on and was giving an operation error but the manual was not very clear about what the error exactly was but with a little bit of troubleshooting and finding out that the control relays not powering on and no keyboard functions we narrowed down to this one switching power supply which of course does not have any indicator LED light they are on the keyboard interface/relay controller board
Found shorted diodes on main controller relays there are 3 of them that... -
Hello all. I'll try to keep this short. I have no knowledge of electronics. I can use a multimeter and am familiar with caps to some extent. I bought a Kenwood KR-6030 vintage stereo. It need work and so I thought I would recap the thing since I get power to the on switch but nothing else is working. No lights, no sound and so forth. I went to Mouser to order caps and I find I am way over my head. I not only do not know the type of capacitors I need but Mouser and digikey do not accept Kenwood part numbers. I have the info such as 220uF 63v and such but no place to put it. I could buy a recap...08-08-2025, 03:16 AM -
Hello everyone!
Recently I've noticed that some ShopJimmy backlight strips don't have double-sided tape installed upon them when an application calls for it, and I must purchase the tape separately. In a recent chat conversation with a customer service agent I told them if this tape wasn't applied when it was called for I would begin to consider ordering my backlight strips elsewhere. It looks like this time may have come.
I recently got a TCL 65S4 with bad backlights. After looking at the SJ listing here: https://www.shopjimmy.com/tcl-jl-d65...365as-m-led-ba...Yes0%1All backlight strips are the same quality0%1No0%0
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