EEVblog Electronics Community Forum

EEVblog => EEVblog Specific => Topic started by: EEVblog on May 21, 2021, 01:12:51 pm

Title: EEVblog 1395 - Onkyo Repair SUCCESS
Post by: EEVblog on May 21, 2021, 01:12:51 pm
Repair success on the Onkyo TX-SR607 surround sound receiver.

https://www.youtube.com/watch?v=rkKyqk1YQ60 (https://www.youtube.com/watch?v=rkKyqk1YQ60)
Title: Re: EEVblog 1395 - Onkyo Repair SUCCESS
Post by: coppice on May 21, 2021, 01:34:54 pm
When those VFDs dim with age they usually do so very unevenly, according to which segments have been most heavily used. That display just looks generally dim, like the heater voltage might still not be quite right.
Title: Re: EEVblog 1395 - Onkyo Repair SUCCESS
Post by: free_electron on May 21, 2021, 04:04:05 pm
hit that DIMMER button on the front panel. see if the display is not set to low level.
Title: Re: EEVblog 1395 - Onkyo Repair SUCCESS
Post by: overk on May 21, 2021, 08:54:52 pm
Well, I'll just repost what I wrote on YT. For exact model... in 5 days

Actually I've had similar problem with my Onkyo (newer model). Relay off after turning it on, or turning off during increasing volume. Tried to search for schematics - 0 points. Than, before trying to open it, I've roamed thru net and YT. Found some folks talking about heating from outside prior and during turning on, left side from top of receiver with hair dryer for 3-5 min on max temp! Well... what's the worse it can happen right? Guess what? It worked. Dunno how, but that receiver is happily buzin' last 4 yrs without a single issue
Title: Re: EEVblog 1395 - Onkyo Repair SUCCESS
Post by: EEVblog on May 22, 2021, 02:53:10 am
hit that DIMMER button on the front panel. see if the display is not set to low level.

Yep, I realised this and it works fine, it was on the lowest setting  :palm:
Title: Re: EEVblog 1395 - Onkyo Repair SUCCESS
Post by: richnormand on May 22, 2021, 09:57:21 pm
Nice videos Dave. I like these troubleshooting sagas.

At least you had the schematics. Used to be that pretty much everything had schematics either included or available.
Then consumer stuff slipped (radio, TV, appliances) and now even professional equipment.
Now manufacturers are trying even harder to make the stuff unrepairable on purpose.
Next trend is although you bought it it's not really yours either.

Grrr... at least my byline clearly shows where I am sitting
Title: Re: EEVblog 1395 - Onkyo Repair SUCCESS
Post by: mindcrime on May 24, 2021, 02:18:38 pm
Love it. The "repair" videos are consistently among my favourites. I feel like a learn a TON for watching an experienced guy like Dave to through the troubleshooting / debugging process on something like this. These make a great complement to the various "theory" related books/videos/classes and suchlike that I study.  :-+

That said, I'd love to see more of the "Fundamentals Friday" and more tutorial / basics oriented stuff on EEVBlog as well. It seems like there hasn't been as much of that stuff lately.  :'(
Title: Re: EEVblog 1395 - Onkyo Repair SUCCESS
Post by: agtrbt on May 26, 2021, 10:44:31 am
about the resistor variation shown in 1:30, i have seen The Yamaha AS501 Service manual specifying polypropylene film cap for japanese variant and mylar cap (higher harmonic distortion >:() for other variants (C328,335-336)

I stop buying Yamaha after reading this.
Title: Re: EEVblog 1395 - Onkyo Repair SUCCESS
Post by: thm_w on May 26, 2021, 08:58:17 pm
about the resistor variation shown in 1:30, i have seen The Yamaha AS501 Service manual specifying polypropylene film cap for japanese variant and mylar cap (higher harmonic distortion >:() for other variants (C328,335-336)

I stop buying Yamaha after reading this.

You realize the retail price may be a lot higher for the Japan version right?

https://www.youtube.com/watch?v=p2EpdRN2h6A (http://youtube.com/watch?v=p2EpdRN2h6A)
Title: Re: EEVblog 1395 - Onkyo Repair SUCCESS
Post by: McRib on May 28, 2021, 03:16:22 pm
I have the TX-SR-608 that was purchased on auction site and the remote did not work so I popped it apart and found 1 electrolytic on the board. I found suitable replacement from junk pile and has worked well for about 4 years now.
Thanks for the repair walkthrough they are also my favorite to watch.
Title: Re: EEVblog 1395 - Onkyo Repair SUCCESS
Post by: AKIM on July 12, 2021, 08:14:40 am
Hello Dave, I am new to the repair of electronic devices. I would have liked to know how can I measure the voltage -35V at the level of -VP.
Thanks for your help et thanks your good videos.
Regards.