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

Tubes / Valves All about our sweet vacuum tubes :) Threads about Musical Instrument Amps of all kinds should be in the Instruments & Amps forum

Counterpoint SA-5000 P.S.U part identification needed
Counterpoint SA-5000 P.S.U part identification needed
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 1st June 2009, 05:16 PM   #1
Tubologic is offline Tubologic  Belgium
diyAudio Member
Tubologic's Avatar
Join Date: Dec 2004
Location: Brussels
Default Counterpoint SA-5000 P.S.U part identification needed

I'm reparing the H.V regulator section of a Counterpoint SA-5000 preamp. Most semiconductors (all transistors and many diodes) were found dead. (shorted or open). Still I have a problem identifying D503, a strange device looking like a transistor in a TO-39 package with a cut lead. It is marked C.I.L 500/150 and this reference cannot be found in any know Semiconductors Databases. Very likely a diode or a selected zener ? This part is dead,measuring about 800 ohms both ways. So,here I'm stuck...
As I don't have the SA-5000 schematic (Impossible to find on the web and I'm not ready to pay $ 100.00 to Mike to get a copy) I don't know the exact function of this diode in the circuit ,nor can I devise a possible substitution. I would greatly appreciate If anybody here with some experience (or schematic) could help me to identify this part (D503) or advise a sub. The HV power supply in the SA-5000 looks quite complex (Tube rectification followed by a S.S pre-regulator and then tube regulation !) and know to be failure-prone. I figured out the sequence of (catastrophic) events who finally leaded to the complete destruction of the power supply (including the power transformer!) All started with an open (underrated) 470K bleeder resistor... but this is another (long) story. Looks like a over-complicated and poorly designed circuit to me. Thanks to all for your help and advices...
  Reply With Quote
Old 4th June 2009, 08:45 PM   #2
ferrstein is offline ferrstein  United States
diyAudio Member
Join Date: Jun 2009
I have a parts list, I'll look it up this evening.

Or drop me a line. I'm new here so I can't email right away.

Great site, I hope to learn a lot here!
  Reply With Quote
Old 25th April 2013, 02:16 PM   #3
da2013 is offline da2013  Italy
diyAudio Member
Join Date: Apr 2013
Hello! Perhaps do you have or do you know where I can find the SA-5000 Service manual in pdf format (also for me is a problem to pay 100 $ for it)? Thenk you in advance, Luca
  Reply With Quote
Old 25th April 2013, 02:31 PM   #4
tvi is offline tvi  Australia
diyAudio Member
tvi's Avatar
Join Date: Apr 2001
Location: Moonee Ponds, Vic, Australia
Crystalonics CILl50/022-CIL500/680 Very High Voltage Current Regulator Diodes

The small part of ignorance that we arrange and classify we give the name of knowledge.
Ambrose Bierce
  Reply With Quote


Counterpoint SA-5000 P.S.U part identification neededHide 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
JL 500/5 Part identification issue???? Messerschmitt Car Audio 13 5th March 2009 10:28 PM
Need help with TESLA part identification. TB Parts 7 11th January 2009 11:14 PM
Part Identification mjrpainless Car Audio 5 11th January 2009 02:00 AM
Counterpoint DA11.5 circuit needed cyliew Digital Source 0 19th April 2007 06:30 AM

New To Site? Need Help?

All times are GMT. The time now is 07:57 AM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 16.67%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio