Pioneer VSX-1122K won't turn on

[Packard93]

Re: Pioneer VSX-1122K won't turn on

How are your fuses ? Disconnect all power and Do you have continuity check on fuses ? This looks like a red flag you said voltage was under a volt .5 at page 88 (BD9328CN) V+3V3_HHH. I think when I read your schematic you have more than one of these if u got another one u can read it too get some measurements off it ic 9521 is the same can take a look at it to see if it ends with 3volts at V+3R3_NW

[tibimakai]

Re: Pioneer VSX-1122K won't turn on

All other voltages are there, only this 3.3V_HHH is .5V.
I have to find out where exactly is used this HHH voltage. There are other 3.3V on the board, those are showing 3.3V.

[tibimakai]

Re: Pioneer VSX-1122K won't turn on

Most likely, the protection is tripped, by this short and not from the amp section.

[88irocvert]

Re: Pioneer VSX-1122K won't turn on

Sorry for bringing this back from the dead but I have the EXACT same problem on the same model. Lightning strike, stuck on Power On message. Followed service manual until X3002 15MHz. I believe it's correct but not sure because the measurement fluctuates. Then I have no idea how to perform the final step of "Check Reset IC (IC3005)" which is part number J126077004210-IL. I'm just wondering if you ever fixed it.

[tibimakai]

Re: Pioneer VSX-1122K won't turn on

I have found another receiver on CL, that had a blown amp and swapped the HDMI boards with that. I was only $40.

[easy_mike]

Re: Pioneer VSX-1122K won't turn on

I have removed the IC, but the short is still there. I have checked the nearby components and they all look good. My question is, how do I find the shorted component?

This is a slightly destructive way to find a short:
-you detach the affected board from connectors
-you cut the supply paths that lead to 3,3V regulator if necessary
-on the regulator output path you solder two wires that you connect to your power supply which will be set to 3,3V and current limit of 3A.
-you let the current flow for two minutes and wait for the affected component to heat up!
-apply isopropanol (alcohol) on the board. Where the shorted element is hot, isopropanol will evaporate! Check with finger... ouch -> there's the proof.

Also check this:
https://www.youtube.com/watch?v=t5fICjcaJ3E

[tibimakai]

Re: Pioneer VSX-1122K won't turn on

Thanks Mike, I'm aware of that procedure(laptop repair, right?).
This one is long gone.
I have an 820, which is completely dead, only if I rest it, with the Adv. surr.and Power on turns on for a few seconds, and then shuts off.

[88irocvert]

Re: Pioneer VSX-1122K won't turn on

I have found another receiver on CL, that had a blown amp and swapped the HDMI boards with that. I was only $40.

Thanks. Does that mean you fixed the VSX-1122 by changing the D-MAIN ASSY (HDMI board)?

[tibimakai]

Re: Pioneer VSX-1122K won't turn on

Yes.

[kronos77]

Hello there.. I know this an old thread, does anyone have good vsx-1122-k dump bios file?