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

Alpine 3545 squared
Alpine 3545 squared
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 16th December 2010, 12:46 AM   #1
Dr Zeus is offline Dr Zeus  United States
diyAudio Member
 
Dr Zeus's Avatar
 
Join Date: Oct 2010
Default Alpine 3545 squared

I got two of these beasts sitting on my bench. I guess they are pretty rare - they say Fabrique Au Japon; AKA Made in Japan. The last time one of these was serviced was in 1996 but these are likely from the late 80s. Class AB from the looks of it (The 3558 was a Class A / Class AB). Their approximate power rating would be about 250w X 2 at 4 Ohms.

Internally these amps are in very good shape. Nothing imidiate catches the DVM off guard. i dont think these are going to be that costly to fix.

From left to right;

The one on the left has a plate number #1105. Powers up but sounds like there is an internal speaker under the PCB - making a white-noise sound.


The one on the right's plate is numbered #0471 and proclaims itself to be 'overheated' when power and rem is applied.

There seems to only be one other thread on DIY about these amps and not a whole lot else. http://www.diyaudio.com/forums/car-a...-problems.html

Click the image to open in full size.

This is gonna be fun... All transistors are individually screwed down.

Last edited by Dr Zeus; 16th December 2010 at 12:49 AM.
  Reply With Quote
Old 16th December 2010, 02:06 AM   #2
spooney is offline spooney  United States
diyAudio Member
 
Join Date: Dec 2006
Most early Alpines had individual screws per transistor. Makes it a real pain to work on but it is so worth it in the end in my opinion. Love these old Alpines
  Reply With Quote
Old 16th December 2010, 08:36 AM   #3
Perry Babin is offline Perry Babin  United States
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
You don't remove the individual screws unless you're removing the transistors. The transistors are screwed to a riser plate. You unscrew that plate.

Let's start with the one in thermal protection. Start a new thread for the other one when we finish this one.

Post the DC voltage on all pins of the 494:


Pin 1:
Pin 2:
Pin 3:
Pin 4:
Pin 5:
Pin 6:
Pin 7:
Pin 8:
Pin 9:
Pin 10:
Pin 11:
Pin 12:
Pin 13:
Pin 14:
Pin 15:
Pin 16:
Attached Images
File Type: jpg IMG_9549x.jpg (144.4 KB, 166 views)
  Reply With Quote
Old 16th December 2010, 09:31 AM   #4
SIRDRINKSALLOT is offline SIRDRINKSALLOT  United States
diyAudio Member
 
Join Date: Jan 2009
Location: On the brink of insanity
I'm no expert with these, but the 2 that I have repaired had solder issues with the vertical boards. Check where it connects to the main board on the under side of the amp. This is where I found the problems on mine.
  Reply With Quote
Old 16th December 2010, 01:34 PM   #5
Dr Zeus is offline Dr Zeus  United States
diyAudio Member
 
Dr Zeus's Avatar
 
Join Date: Oct 2010
Thanks Perry:

494:

Pin 1: 0.021
Pin 2: 0.899
Pin 3: 0.837
Pin 4: 5.06
Pin 5: 1.697
Pin 6: 3.741
Pin 7: 0
Pin 8: 13.63
Pin 9: 0.789
Pin 10: 0.799
Pin 11: 13.68
Pin 12: 13.68
Pin 13: 5.07
Pin 14: 5.07
Pin 15: 5.07
Pin 16: 0.001

Theres no more than 13.7vDC anywhere

Also, (on both of these amps) the power curcuitry is using D1065 transistors. Measuring from legs 1-3 I get only 3 ohms like they are shorted; but 1-2 and 2-3 I get 5M Ohms.
  Reply With Quote
Old 16th December 2010, 01:50 PM   #6
Perry Babin is offline Perry Babin  United States
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
Remove ZD601. Does the amp power up with that diode out of the circuit?
  Reply With Quote
Old 16th December 2010, 02:19 PM   #7
Dr Zeus is offline Dr Zeus  United States
diyAudio Member
 
Dr Zeus's Avatar
 
Join Date: Oct 2010
I removed D601 and the amp did not appear to want to power up.
  Reply With Quote
Old 16th December 2010, 02:22 PM   #8
Perry Babin is offline Perry Babin  United States
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
Can you be more specific?

Is everything precisely as it was before?
  Reply With Quote
Old 16th December 2010, 02:23 PM   #9
Dr Zeus is offline Dr Zeus  United States
diyAudio Member
 
Dr Zeus's Avatar
 
Join Date: Oct 2010
Yes I was about to edit. The LEDs on the front come on just as before - REM and Overheat LEDs.
  Reply With Quote
Old 16th December 2010, 02:25 PM   #10
Perry Babin is offline Perry Babin  United States
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
Remove Q602. Does the amp power up?
  Reply With Quote

Reply


Alpine 3545 squaredHide 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
Kenwood DR-3545 Manual(s) needed. Hardi Equipment & Tools 0 7th November 2010 11:12 AM
Alpine 7914 Alpine 7915 specs ? Robcrx Car Audio 4 8th September 2009 03:28 PM
Larry Moore 10Y Squared korneluk Tubes / Valves 5 25th June 2008 06:40 PM
Alpine 3545 (alpines best) problems DerekB1 Car Audio 2 8th January 2005 05:58 AM
E = m x c^2 .... Energy = mass x lightspeed squared gromanswe Tubes / Valves 35 31st July 2002 11:28 PM


New To Site? Need Help?

All times are GMT. The time now is 06:39 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki