Re: Onkyo HT-R591 keeps clicking
Here this video will help:
https://www.youtube.com/watch?v=1xIlqe-P1CM
Here this video will help:
https://www.youtube.com/watch?v=1xIlqe-P1CM
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Re: Onkyo HT-R591 keeps clicking
So I found this to be strange: I had my alligator clips/fuse connecting the two pins that the thermal fuse is connected to, and it still did the power flicker thing. I even cut one of the thermal fuse leads and had just the fuse link in there, and still had the same issue. Are those leads coated with something to prevent a good contact? The ohm meter said there was no resistance in the leads or the thermal fuse. I tested all the transistors, no shorts there. I tested all the ceramic resistors and those all seemed to measure 0 ohms. Because they were all the same, I guess they are okay.
I'm starting to wonder if the issue is not somewhere in the first little transformer near where the power plugs in.Comment
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Re: Onkyo HT-R591 keeps clicking
I replaced the thermal fuse, and am still having the issues. Sometimes, the whole receiver will shut off and not power back on for days. When it does come back on, it'll stay on, but occassionally (and with no time-based pattern I can discern) will flicker on/off. I popped the relay cover off on the relay next to the incoming transformer (where the power plugs in) to see if it's burned out or flawed, but it looks perfect. When it works, that relay clicks on and off with no big spark, but when the power flickers on/off, there is a huge blue spark at that relay when it shuts off. It was doing this with no speakers plugged in. All the transistors and their respective resistors (on what I think is the amplifier board) tested fine (not shorted). Where should I look next?Last edited by IDoSeaDoo; 08-24-2015, 01:41 PM.Comment
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Re: Onkyo HT-R591 keeps clicking
is there such thing as "Checking for a ground" in the world of AC electronics? I have a mechanical background and that is a common issue with DC marine electronics.Last edited by IDoSeaDoo; 08-24-2015, 02:57 PM.Comment
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Re: Onkyo HT-R591 keeps clicking
Thanks you for this service manual, it's the only place on the web I found it!Comment
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Re: Onkyo HT-R591 keeps clicking
I have the same problem, any chance I can obtain that service manual for the HT-R591? It seems the HT-R590 is very different. ThanksComment
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Hello!
I'm looking at an original Xbox PSU: Foxlink ftps-0002 rev. B. The 12 V output is too low, and the 5 V output is too (?) high. Unfortunately I don't have an oscilloscope but only a DMM for diagnosis.
Measured voltages with no load:
After rectifier diodes
12V: 6.17 V
5V: 5.67 V
Secondary transformer pins AC measurement (really don't know if this says anything)
12V: 2-2.5 V
5V: 1.04 V
I also have another (working) Xbox psu from Delta. The same measures there, in order, being: 10.79,... -
Hi all,
Got this local made DC power supply (12/14V) given free as the transformer has melted. There is no marking or indication to identify what type or rating of transformer used.
Fyi,. I had a busted autogate mainboard with transformer with marking 13-0-13 . Is this the 13v dc type transformer?
My questions are
1. How do i test to see if the transformer is in good working condition?
2. Can this transformer (marking 13-0-13) be used to replace the melted transformer on the DC power supply?
Hope you guys understand what i was asking. My intention is... -
Hello All,
i would like to post an interesting topic regarding 3-phase stepdown transformer which we suspect to cause an overcurrent (138A) which resulted to power tripped off of the HV power supply (80KV output).
Problem statement: Power tripped Off
Initial Problem: Found 2 IGBT and 2 rectifier diodes shorted (burnt).
Action Done:
1) Replaced the faulty parts with good spare.
2) Measured impedance of the 3phase input lines and found that L2 to L3 has 23.3ohm while other pairs are 51Kohm. This pins will... -
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