Recent content by patrick_l

Here is schematics of circuits where are both voltages used (+12V and -12V):

I've been trying for days to figure out what is wrong with this receiver. When it is switched on, everything appears ok. Speaker relay engages. But there is no sound at all! Tried different inputs, and it can't be heard anything, not even a static noise, nothing. Tried headphones, also nothing...

I'm happy to say it is solved :). After I tested transistors, decided that I should solder them back where they were, and also to put boards back to their place. As I figured out, only option left is to check every possible connection there to see if somewhere I have cold solder or loss of...

Because protection IC got me thinking in completely another direction than I should according to voltages I measured at it's pins. I didn't realize I have so big offset at the end stage when I thought about problem in the first place. Because, voltages suggested that AC off detected. I wasn't...

Day 4th, and problem not solved, yet. In my last post, I mentioned regulators, so that was first thing to do today, to check if they are ok. My DMM show they are perfectly fine, so it's not the problem in this case. Next I tried to see if problem will go away if I disconnect some of the boards...

Well, day 3, and struggle continues. This time I wanted to be sure I don't have bad output transistors, so I desoldered them and tested individually by using Peak DCA55 semiconductor component analyser. Every single one is ok. Also noticed not so well solder on two of them. Soldered them again...

I've been trying for two days already to figure out what is going on with this receiver that all from a sudden went to protection mode. Before that it was ok, played ok, and after switching it off, after about 10 days of not using it, tried to switch it on, but, surprisingly, it went to...

Also checked all parts around voltage regulator, didn't find anything bad. Service manual is very complex. Starting to lose hope...

Got this tuner few days ago, but it is not working. Tuner does not respond to any command. On display i have number 1888, "tuning mode" and also numbers from 1 to 5 that would indicate signal, but don't have bars for signal at all. Checked power supply unit, and concluded i don't have 5V...

Contacted seller about those caps, and he told me to try it...Later I got tempted to see if this plastic sleeve was placed over another one, but seems that it isn't. But, top of the capacitors are different, so I completely doubt that Rubycon would use different kind of cans for same series of...

Unfortunately, I don't have variable power supply, so I can't test voltage rating of that caps. My ESR meter don't check voltage rating, just capacitance and ESR. Shipping costs of reputable suppliers for my country are way too much, much more than price of parts is, so ebay looks like only...

Got this item few months ago, but it's not working ok. I can hear both channel working, but one seems to have big distortions, that is more noticeable if i crank the volume up. So what I found inside is that one of two filter capacitors leaked so much, that it can be seen on bottom plate of...

Thank you for advice. Pity I didn't have chance to try that, because buyer didn't complain about problem I mentioned to him. It was not a big deal for him, options I explained as problematic ones. But for sure I will know in the future what to do.

Onkyo CR-L5 have problem. Read any disc without problems, plays half of tracks of every cd without any error, but last tracks on cd fail to read. For example, if CD have 16 tracks, and I want to hear number 16 first, it won't read it. But if I press play, number 1 start really fast and I could...

Thank you very much. I've been testing it since repairing, no problems whatsoever. Amazing sound, and I am really satisfied. Quality phono section! Also noticed, that unit doesn't warm up at all :). Tested idling current, and everything is perfect by specification. I totally recommend this...