Pearl need help - diyAudio
Go Back   Home > Forums > Amplifiers > Pass Labs

Pass Labs This forum is dedicated to Pass Labs discussion.

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
Reply
 
Thread Tools Search this Thread
Old 26th September 2006, 02:26 PM   #1
dzkh63 is offline dzkh63  Hong Kong
diyAudio Member
 
Join Date: Feb 2004
Location: Hong Kong
Default Pearl need help

I clone a Pearl phono stage a year ago( PC board order from Pass-Labs), all check point voltage was correct and good performance. since I stop use it 6 months, today it is out of working-right chanel no sound and left chanel have very small sound. I open the cover and measure the check points voltage. the Q5 - Q8,Q9,Q10,Q11 point voltage before is 10.75V now only 1.80V (both chanel same), R18 - R21 point before 11.52V now 2.23V, R23 point was 15.11V now 2.45V. Looks like R19 has a lot voltage drop. I have changed Q5 than changed Q8,Q9,Q10,and Q11 but have same result. I don't know how to check the 2SK170's quality, I need help please give your advice.Thank you!
BTW other check points voltage are correct.
  Reply With Quote
Old 26th September 2006, 03:16 PM   #2
Cobra2 is offline Cobra2  Norway
DIY !
diyAudio Member
 
Cobra2's Avatar
 
Join Date: Apr 2002
Location: Stavanger, Norway
Send a message via Skype™ to Cobra2
Default Gnd?

Check ground-path, from psu-in, and on(under) all caps...

Arne K
__________________
Don't believe everything you think...
  Reply With Quote

Reply


Hide 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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Another diy-pearl... lykkedk Pass Labs 18 15th June 2007 04:44 PM
ono or pearl PCB's mantisory Pass Labs 1 28th September 2006 11:12 PM
WTB: Pearl PCB aire Pass Labs 1 26th February 2006 10:51 AM
The Pearl-X Vince Maida Pass Labs 12 28th July 2002 07:28 AM


New To Site? Need Help?

All times are GMT. The time now is 04:10 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2