VSX-925-K flashing PQLS light, turns off immediately
Testo:
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):
[image|2521127]
The Main Assy (power board, at the bottom):
[image|2521128]
[image|2521129]
The main transformer:
[image|2521130]
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:
VSX-925-K flashing PQLS light, turns off immediately
Testo:
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):
[image|2521127]
The Main Assy (power board, at the bottom):
[image|2521128]
[image|2521129]
The main transformer:
[image|2521130]
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:
VSX-925-K flashing PQLS light, turns off immediately
Testo:
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):
[image|2521127]
The Main Assy (power board, at the bottom):
-
[image|2521128][image|2521129]
+
[image|2521128]
+
+
[image|2521129]
The main transformer:
[image|2521130]
+
+
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:
VSX-925-K flashing PQLS light, turns off immediately
Testo:
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):
VSX-925-K flashing PQLS light, turns off immediately
Testo:
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