Onkyo TX-SR607 HDMI problem showing a black screen intermittently

[redwire]

Onkyo TX-SR607 HDMI problem showing a black screen intermittently, audio was OK.
It would usually cut out a few minutes after power on, for maybe 1 minute then work OK, then cut out and go to black again. Or fade out to sparkles and noisy video.

Well known is these boards need recapping and there is a strange mix of parts on both sides of the board.

The bottom of the board has 100uF 4V (5.3*5.3mm, qty 5) and 220uF 4V (6.6*6.6mm, qty 5).
Per the service bulletin, an issue is the Toshiba LDO's want low ESR for stability so I went with 100uF 6.3V polymer Nichicon 647-PCS0J101MCL1GS. The 220uF replaced with 647-UUA0J221MCL1GS from Mouser.
I tested the old caps and they were all bad, low value and high ESR.

Top side of the board also has (qty 2) 220uF 4V which were low value and replaced.
Through-hole Nichicon VR 470uF 16V 85°C (qty 5) tested OK so I left them.
SMT "G3 470A CD" (qty 3) I did not check or replace. Not sure what they are for make/voltage rating. Anyone know?
SMT 22uF 4V? I did not have any and left it but it's in a hot spot.

Most of the caps are on big copper or right next to parts so soldering is a bit awkward.
The board is fragile, do not trash the big IC pins.

Leaving a recap list spreadsheet.

[CapLeaker]

Re: Onkyo TX-SR607 HDMI problem showing a black screen intermittently

good job redwire! Hopefully it behaves itself now for a long time.

[redwire]

Re: Onkyo TX-SR607 HDMI problem showing a black screen intermittently

I find it's working good, for the price of a Mouser order. It's a dumpster rescue I've had for years, original owners replaced it with a Sony STR-DH770 that sounds shitty by comparison, does not party like the Onkyo

It also used to turn on in weird modes, most 220uF parts are for the SDRAM and CPU so that seems to be fixed as well.
Strange when off it runs medium-hot, the HDMI board/CPU stays running for pass-through. When it's on then you add the heat of the 7 power amps, and with no fan- it's hot.

I did not replace the top-side 470uF 10V parts because I didn't have them and soldering looks tricky with parts right next to them- there is no room barely to get a soldering iron in there.
I removed the 100uF, 220uF old caps by the twist back and forth until the leads broke.

Onkyo volume control encoder replacement I did in this thread (Onkyo P/N 25065655W, Alps EC12E2425 substituted Alps EC12E2420803 and it works/fits just like the original. Mouser 688-EC12E2420803).