Chosen Solution
Pioneer VSX-531 AV Receiver 5.1-channel receiver with 5x130 Watt, 4 HDMI ports, HDCP 2.2, MCACC automatic calibration, Advanced Sound Retriever, Bluetooth and USB I have a digital copy of the user manual | Need a schematic or wiring diagram Expert researcher / Novice electrical repair experience (I know enough not to be dangerous, and can fix most basic electronics given enough time) Source: Found “Free” on OfferUp Issue: Unit does not power upWhen plugged in, HDMI light flashes (indicating error state)No other lights illuminate, standby/on button doesn’t function Error Diagnosis: (Per user manual): The HDMI indicator blinks and the power does not turn on. The receiver may have a serious problem. Do not try switching the receiver on. Unplug the receiver from the wall and call a Pioneer authorized independent service companyThat’s helpful…? Troubleshooting: Able to temporarily clear error by simultaneously pressing “Advanced Surround” and “Standby/on” for 5 secondsAfter doing so, unit clicked, initialized, something got hot & smoked for a secondUnit went back into safety power offBack to HDMI flashing error state What I’ve done: Isolated component that was getting hot (smoking): Resistor R14FLUninstalled the MOSFET / heatsync daughter board (720-07995-000-0S) from the unit, this board contains the overheating resistorResistor tests same ohm resistance (.34) as adjacent resistor on neighbor MOSFET Pix Burning Resistor (circled in red)
Photos of the MOSFET / heatsync daughter board (720-07995-000-0S)
Really appreciate any help that the forum can offer :-) Cheers, Lou
What makes this a bit tricky is that the component labels on the board do not match the schematic. Can you post the numbers on the transistor to the left of the circled resistor in your picture? Also, what are the color bands on that resistor and the one next to it? This portion of the board is for the front left channel of the amp. It looks like the outputs for that channel are shorted and causing the amp to go into “protect” mode. Can you test the transistors in that area for shorts? These should be numbered B1560 and D2390 (on the parts themselves). This is shorthand for the actual part numbers: 2SB1560 and 2SD2390. With the transistor number requested, I can verify that I am at the correct point in the schematic. Thanks, Dan
I had problem too I did the advanced surround and standby buttons hold for say ten seconds and it clicked back on and works great again!
