Help Fixing BXI2607D - Page 2 - diyAudio
Go Back   Home > Forums > General Interest > Car Audio

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 20th December 2012, 10:55 PM   #11
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
What is the DC voltage on all legs of Q2?
  Reply With Quote
Old 21st December 2012, 02:31 AM   #12
diyAudio Member
 
Join Date: Dec 2012
Q2 from right to left

12v
.75v
.75v
  Reply With Quote
Old 21st December 2012, 08:53 AM   #13
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
The transistor is defective. It should be marked BE. If so, it's a 2SB1260.
  Reply With Quote
Old 22nd December 2012, 05:01 AM   #14
diyAudio Member
 
Join Date: Dec 2012
Perry.. You sir know your stuff. Got the amp back into protect.. haha never have I been happier to see an amp in protect.

So I power up. I get RED GREEN RED.. No relay engagement. All Output fets removed all PS fets removed. Audio board removed.

New Gate Drive Transistors 139 replacing 3228 for NPN 140 replacing PNP

Voltage on 7500

P 9 10 11 12 13 14 15 16

0
0v
12.6v
12.6v
5v
5v
5v
0v

I get 5v and saw tooth at 48kHz Must be something else on the PS card then?

I get 0V on PS gates before and after resistors.


Thanks for the help,

Mo
  Reply With Quote
Old 22nd December 2012, 01:05 PM   #15
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
Post the DC voltage on pins 1-4 of the 7500.
  Reply With Quote
Old 22nd December 2012, 02:19 PM   #16
diyAudio Member
 
Join Date: Dec 2012
DCV P 1 2 3 4

6.04v
2.5v
4.68v
3.95v
  Reply With Quote
Old 22nd December 2012, 06:11 PM   #17
diyAudio Member
 
seankane's Avatar
 
Join Date: May 2010
Location: Washington State
Are you sure you dont have a burned trace somewhere?
__________________
Pyramid 52 Amp Power Supply----Fluke 787 Processmeter----Tektronix 465 Scope----Velleman HPS40 Scope----Soldering Iron----Desoldering Iron----Hejet HJ 500-S Heatgun----DM4070 Digital LCR Meter----Propane Torch
  Reply With Quote
Old 22nd December 2012, 06:29 PM   #18
diyAudio Member
 
Join Date: Dec 2012
I'm pretty sure. I've looked over the board carefully. I'm all too use to seeing blown traces. But I don't see anything bad. None of the traces on this amp are thin enough for me to easily miss. I do think that some of the diodes by the speaker terminal are shorted. But I haven't taken them off to test yet I think it shouldn't have anything to do with the Ps board not powering up the gate transistors allowing me to get power at the gates of my ps fets What's q225 and q 226 used for ?
  Reply With Quote
Old 22nd December 2012, 06:38 PM   #19
diyAudio Member
 
seankane's Avatar
 
Join Date: May 2010
Location: Washington State
Q225 I believe is connected to those diodes by the speakers terminals. I replaced both of them in the last amp I repaired and used the BD139 and BD140.
__________________
Pyramid 52 Amp Power Supply----Fluke 787 Processmeter----Tektronix 465 Scope----Velleman HPS40 Scope----Soldering Iron----Desoldering Iron----Hejet HJ 500-S Heatgun----DM4070 Digital LCR Meter----Propane Torch
  Reply With Quote
Old 22nd December 2012, 06:44 PM   #20
diyAudio Member
 
Join Date: Dec 2012
I'm pretty sure. I've looked over the board carefully. I'm all too use to seeing blown traces. But I don't see anything bad. None of the traces on this amp are thin enough for me to easily miss. I do think that some of the diodes by the speaker terminal are shorted. But I haven't taken them off to test yet I think it shouldn't have anything to do with the Ps board not powering up the gate transistors allowing me to get power at the gates of my ps fets What's q225 and q 226 used for ?
  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
KA7500bd Pin 1 high??? Brutus BXi2607D Deadly Sones Car Audio 41 23rd April 2011 12:39 PM
Fixing this 100TH Gluca Tubes / Valves 1 21st February 2007 01:05 AM
Fixing my chattery sub keantoken Subwoofers 3 4th January 2007 05:37 AM
R-to-R freebies (need fixing) PeteMcK Analogue Source 2 10th May 2005 06:31 AM
Fixing Cabinet techno Multi-Way 2 15th August 2001 02:04 PM


New To Site? Need Help?

All times are GMT. The time now is 11:27 AM.


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