Onkyo TX-NR636 Intermittently shuts off. Corrosion? Customer repair? What else? Part 1 of ???
Ғылым және технология
A nice Onkyo TX-NR636 came in and the customer says it shuts off intermittently. I found some corrosion on the main board and several damaged parts on the driver board. This is part 1 of ???
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00:00 Intro and a look around
00:36 Is that corrosion?
01:56 Cleaning corrosion with Acetone!
02:56 More corrosion
03:16 First power up
03:47 Testing DC bias
04:33 Testing for DC offset
05:07 Even more corrosion
05:42 Troubleshooting with just a voltmeter
08:26 Testing suspect driver transistor
09:21 I had to look at a schematic
Пікірлер: 16
This must be close to being beyond economic repair, with such widespread corrosion future reliability must be in question. Great video as always.
Thank you..
Really informative. Thanks for teaching this hobbyist.
i love your videos and how you do things...such good skills :)
i'm impressed. good troubleshooting skill
Maybe a beer was spilled.
Good job 👍 thanks
If someone asks me to choose between schematics and mr.norcal, I am choosing Mr.Norcal......
nice work
WOW
👋😎👍
Hello. Can you tell me how to check the operation of the cooling? My fan never turns on. The Resvier is very hot, the thermometer on the top panel shows 40°C - 104°F
@norcal715
2 жыл бұрын
Some of these units did not turn the fan based on the temperature, they started the fan based on the audio output level. The higher the level the more voltage to the fan. I am 2500 miles away from home right now, I will try to check when I get home.
@gorets2502
2 жыл бұрын
@@norcal715 Hello. I found the wiring diagram for the fan in the service manual. The fan is turned on with the help of the Q6300 thermal sensor and is controlled by the Q7009 MPU and the Q8701/11 driver. I just took a lighter and warmed up the Q6300 - and the fan turned on. The diagram shows the switch-on temperature and its speed.
I like gur G 🙏🙏🙏❤
Haha. 1st