Planet Audio ZR300.4 - 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 21st May 2010, 07:52 PM   #1
diyAudio Member
 
Join Date: Dec 2009
Default Planet Audio ZR300.4

Amp is not getting remote power. This amp was playing just fine and suddenly cut off. It does nothing, dead as a doornail. No amp draw, nothing. I get power all the way up to the chip on the remote input side and no further.

Ideas welcome.

Click the image to open in full size.

Click the image to open in full size.
  Reply With Quote
Old 21st May 2010, 08:33 PM   #2
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
It may simply be a broken connection on a component or jumper. The layout is shown on the top of the board. Follow the voltage from the remote terminal towards the 494 to see where you lose voltage.
  Reply With Quote
Old 21st May 2010, 08:51 PM   #3
diyAudio Member
 
Join Date: Dec 2009
Quote:
Originally Posted by o. l. t. View Post
I get power all the way up to the chip on the remote input side and no further.
Right there. Input pin 1 I suppose of the chip is where the remote power stops. It was once suggested a capacitor may be to blame since these chips rarely fail, but the idea went no further.
  Reply With Quote
Old 21st May 2010, 08:58 PM   #4
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
Post the voltage on all 16 pins.


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:
  Reply With Quote
Old 22nd May 2010, 10:58 PM   #5
diyAudio Member
 
Join Date: Dec 2009
Hilarious, all I have is paint on this computer. Pathetic looking ain't it?

The one pin that shows 1 volt rises from zero to 1 volt over the first 30 seconds the amp is on, the others are dead except where it is marked 12 volts.


Click the image to open in full size.
  Reply With Quote
Old 22nd May 2010, 11:46 PM   #6
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
I posted the list so you could copy and paste and fill in the blanks. If you don't know the pin numbering scheme, see attached.

It appears that the IC is defective or something is dragging the 5v regulated output to ground. Pin 14 is the regulated output and should have 5v on it.

As a side note... If you need a better program for drawing, download Open Office (free) and use the 'Draw' application. It's not great but it's MUCH better than paint.
Attached Images
File Type: gif pinconfig494-01.gif (4.8 KB, 36 views)
  Reply With Quote
Old 23rd May 2010, 12:15 AM   #7
diyAudio Member
 
Join Date: Dec 2009
Pin 3 has 1 volt on it, but must rise from zero over 30 seconds to get there.

Pins 8, 12, 11 all have 12 volts on them.

What part number readily available would replace that chip? That one is a booger to find.
  Reply With Quote
Old 23rd May 2010, 12:32 AM   #8
diyAudio Member
 
Brain Fried's Avatar
 
Join Date: Apr 2010
Quote:
Originally Posted by o. l. t. View Post
Pin 3 has 1 volt on it, but must rise from zero over 30 seconds to get there.

Pins 8, 12, 11 all have 12 volts on them.

What part number readily available would replace that chip? That one is a booger to find.
The TL494? i am not 100% ask perry to make sure.
  Reply With Quote
Old 23rd May 2010, 01:42 AM   #9
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
Yes. A TL494. Mouser doesn't have the 494 but they have the 594 which is essentially identical. Click HERE.
  Reply With Quote
Old 23rd May 2010, 01:42 AM   #10
diyAudio Member
 
Join Date: Dec 2009
TL494

If one of those will work just point to it I don't know all the different designations of each chip.
  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
Planet Audio VX2200D tdetlor Class D 0 4th February 2010 01:58 AM
Planet Audio Vortex AMP I.D. ?? Scanlines Car Audio 4 15th May 2009 07:47 PM
Need specs for Toshiba, Planet Audio SharpyWarpy Multi-Way 0 21st April 2007 06:00 AM
Planet Audio amp rader Car Audio 3 7th November 2006 08:50 PM
Current Planet Audio Amps 69CamaroSS396 Car Audio 1 30th July 2006 03:29 PM


New To Site? Need Help?

All times are GMT. The time now is 10:26 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