Chosen Solution
Hello, I could not find the Pioneer VSX-925-K receiver in the device list. The PQLS light flashes when the unit is turned off, and if I press the power button to turn it on, it turns back off by itself after about a second. I have found the service manual for the VSX-1020-K which according to some info I’ve found is very similar to the 925. It says in the “error indications” section that a flashing PQLS light means ““Abnormality DC voltage of the Digital power supply” detection”. In the “diagnosis flowchart” section, I have done the “Step 2: Power supply” flowchart steps. All voltages the flowchart had me check were OK. Where do I go from there? Are there more checks I can do to diagnose the specific problem, and possibly repair it? I have a multimeter, a soldering iron and some experience soldering, so I should be able to repair the problem if I knew what it was. I also have an oscilloscope (compact 1-channel one) but no experience actually using it, so if I need to use that to go further I’d need a bit more hand-holding. Thanks in advance, J-S Here are pictures of the unit: The Digital Main Assy board (with the HDMI ports, at the top):
The Main Assy (power board, at the bottom):
The main transformer:
Service Manual for VSX-1020 which is very similar to VSX-925, and the manual is much more detailed than the one for the 925: Pioneer Vsx 1020 K 1025 K Sm CP11 in the service manual
CP11 in my unit
O/L Detect wire disconnected
Edit 2021-12-21 Area around X361
Area around X362
Wear around screw holes
Edit 2021-12-24 Cold solder joints on HDMI ports
@skylark13 this is not an answer just a way to attach the right SM for your receiver. I prefer to have the right schematics so there should be no guessing. CP11 connector/cable is the one that we need to find. #8 connector is the one that shuts it off based on the OL condition. Disconnecting the OL circuit should get your receiver to turn on but it will not resolve the OL (OverLoad) condition. Pioneer VSX 30 31 925
