Protect E03, Good Voltage output

[Echo26]

Looking for answers, I have a Sony Shake 6D Hifi system and has E03 power supply tag error. However for some time. Unit is working like a couple of hours but after minutes sometimes E03 triggers. I did check the voltage. And they were nominal as indicated by the service manual. I have seen bloated Capacitors on yhe amp section, but I can easily swap them out.

However chances might be , caps will bloat anytime if issue is unaddressed.

How can I measure negative voltage on analog multimeter?

I tried to measure the positive voltages, same as output from the service manual.



Since Eo3 triggers, No voltage output can be read anymore from the positive rails.



How can I make sure that the smps is producing right voltage without tripping the Protect E03 error?



I dont have a schematic for the smps, only for the Amp driver circuit as includid in the service Manual.

 

[shrtrnd]

Your error code tells you that you have a power supply problem. If you see bloated caps, I'd replace them and see what happens.
You can read a negative voltage on your analog meter by reversing the positive and negative leads.
I would assume when your error code kicks in, it disables your power to protect the amplifier from damage.
Look for other problems IF replacing the bloated caps doesn't fix the problem.
My guess is the error occurs when the power supply overheats from problems with your bloated caps.
Come back for additional advice if this doesn't fix your problem.

 

[bertus]

Hello,

In addition to what @shrtrnd said, is here a page that will help you spot the bad caps:
https://www.robotroom.com/Faulty-Capacitors-1.html

Bertus

 

[Harald Kapp]

How can I measure negative voltage on analog multimeter?

Connect the "+" lead to ground, the "-" lead to the negative voltage.

How can I make sure that the smps is producing right voltage without tripping the Protect E03 error?

Measuring the voltage will not trip the power supply as the current drawn by a voltmeter is very, very small. If the power supply trips, the cause is to be found elsewhere.