Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Solid State Talk all about solid state amplification.

Parasound DR-40 stuck in standby mode fix
Parasound DR-40 stuck in standby mode fix
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools Search this Thread
Old 16th March 2010, 12:10 AM   #1
ham1 is offline ham1
diyAudio Member
Join Date: Mar 2010
Default Parasound DR-40 stuck in standby mode fix

If anyone has a Parasound DR-40 that is stuck in the standby mode (red LED), check resistor R020. The value of this resistor should be 12K ohms. I recently repaired a receiver with this problem and the resistor had changed to 330K ohms. This caused insufficient voltage to the switching transistor that energizes the standby/operate relay. This resistor is located on the left side of the circuit board near the relay and main line fuse. Shorted audio output/driver transistors can also cause the unit to stay in standby.
  Reply With Quote
Old 8th February 2012, 01:17 PM   #2
dbshortwave is offline dbshortwave
diyAudio Member
Join Date: Feb 2012
Change the caps in this area or replace them all in this receiver. DON'T change that resistor its suppose to be a 330K ohm.
2,10uF @ 25v and 1, 45uF @ 10v
They are part of the delay / timing circuit.

The radio isn't marked for this but the amp section fuses are 5 Amps.

Do your normal checks of this radio; outputs, FUSES, check your caps etc..
  Reply With Quote


Parasound DR-40 stuck in standby mode fixHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Parasound DR-40 ham1 Solid State 2 3rd December 2012 10:21 PM
Stuck in standby mode jmillerdoc Solid State 3 8th March 2010 06:45 PM
Stuck on Standby Brouilly Tubes / Valves 16 20th March 2009 05:19 PM
Stuck in standby, and other stories GAgola Solid State 0 27th June 2008 10:04 AM

New To Site? Need Help?

All times are GMT. The time now is 10:10 PM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio