I believe that you’re looking at it the wrong way.
-
The +32.5V is supplied by the switching regulator and IF there is no protect signal in evidence then the enable signal will be sent to the switching regulator.
+
The +32.5V is initially supplied by the switching regulator and IF there is no protect signal in evidence then the enable signal will be sent to the switching regulator.
Here are some images taken from the [https://elektrotanya.com/sony_bdv-e780w_w980w_e985w.pdf/download.html|service manual]. It is in a mixture of Portuguese and English but you should still be able to read the circuits.
To download the manual, click on the link above and then click on the “''I am not a robot Captcha box''” below the Document preview box, pass the test and then click on ''Go to Download.'' Wait until the sentence ''This file is downloadable free of charge (5/day): ...processing...'' changes to ''This file is downloadable free of charge (5/day): Download (sony bdv-e780w w980w e985w)'' and then click on ''Download.'' Be patient as it takes a little while to find the file.
[image|1826506]
[image|1826507]
[image|1826510]
(click on images to enlarge for better viewing)
The first image shows the +32.5 V coming from the switching regulator.
The second image shows the +32.5V being supplied via a zener diode, to the “protect detect circuit”, the output of which goes into the system controller and to the switching regulator.
The third image shows the +32.5V volts entering the AMP board from the regulator.
There are no other +32.5V supplies in the device.
Did you try a “cold reset” to check if this has any effect? See p.21 in the manual.
I believe that you’re looking at it the wrong way.
The +32.5V is supplied by the switching regulator and IF there is no protect signal in evidence then the enable signal will be sent to the switching regulator.
Here are some images taken from the [https://elektrotanya.com/sony_bdv-e780w_w980w_e985w.pdf/download.html|service manual]. It is in a mixture of Portuguese and English but you should still be able to read the circuits.
To download the manual, click on the link above and then click on the “''I am not a robot Captcha box''” below the Document preview box, pass the test and then click on ''Go to Download.'' Wait until the sentence ''This file is downloadable free of charge (5/day): ...processing...'' changes to ''This file is downloadable free of charge (5/day): Download (sony bdv-e780w w980w e985w)'' and then click on ''Download.'' Be patient as it takes a little while to find the file.
[image|1826506]
[image|1826507]
[image|1826510]
(click on images to enlarge for better viewing)
The first image shows the +32.5 V coming from the switching regulator.
-
The second image shows the +32.5V being supplied to the “protect detect circuit”, the output of which goes into the system controller.
+
The second image shows the +32.5V being supplied via a zener diode, to the “protect detect circuit”, the output of which goes into the system controller and to the switching regulator.
-
The third image shows the +32.% volts entering the AMP board from the regulator.
+
The third image shows the +32.5V volts entering the AMP board from the regulator.
There are no other +32.5V supplies in the device.
Did you try a “cold reset” to check if this has any effect? See p.21 in the manual.
Hi @jllitter ,
I believe that you’re looking at it the wrong way.
The +32.5V is supplied by the switching regulator and IF there is no protect signal in evidence then the enable signal will be sent to the switching regulator.
Here are some images taken from the [https://elektrotanya.com/sony_bdv-e780w_w980w_e985w.pdf/download.html|service manual]. It is in a mixture of Portuguese and English but you should still be able to read the circuits.
To download the manual, click on the link above and then click on the “''I am not a robot Captcha box''” below the Document preview box, pass the test and then click on ''Go to Download.'' Wait until the sentence ''This file is downloadable free of charge (5/day): ...processing...'' changes to ''This file is downloadable free of charge (5/day): Download (sony bdv-e780w w980w e985w)'' and then click on ''Download.'' Be patient as it takes a little while to find the file.
[image|1826506]
[image|1826507]
[image|1826510]
(click on images to enlarge for better viewing)
The first image shows the +32.5 V coming from the switching regulator.
The second image shows the +32.5V being supplied to the “protect detect circuit”, the output of which goes into the system controller.
The third image shows the +32.% volts entering the AMP board from the regulator.
There are no other +32.5V supplies in the device.
Did you try a “cold reset” to check if this has any effect? See p.21 in the manual.