Kicker ZX300.1 going into Protect mode, I need help - 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 11th August 2012, 09:12 PM   #1
diyAudio Member
 
Join Date: Apr 2012
Location: SouthEast
Default Kicker ZX300.1 going into Protect mode, I need help

First, I am new to repairs. I have Perry's repair tutorial that I am working my way through, but because of all the info that it has, it is somewhat overwhelming.

On to the problem/question:

I have a Kicker ZX300.1 monoblock that flashes Green to Red.
The circuit board has a date of 14-04-2006 and is a Rev 1.2

I have remove the output transistors from the board and checked them and they appear fine to me. They read as the tutorial says that they should. There are (3) C5242A and (3) C1962A. They are connected to a large ceramic resistor each, which has 5W0.2ohmJ printed on the sides. I measeured them with the transistors out of the board and they appear to be within tolerance.

Here are the voltages on the TL494 IC
1) fluctuates from 1.07 - 1.22
2) 3.3
3) 0 and then up to 5 when the red protect light flashes
4) 0
5) 1.5
6) 3.42
7) 0
8) & 11) 4.5 then fades to 0 when the red protect light flashes
9) & 10) 1.67 then fades to 0 when the red protect light flashes
12) 12
13) - 15) 5
16) 3 then climbs to 9 when the red protect light flashes



Nothing appears to be burnt on the board

I do not have a scope and know that I need to invest in a better meter. With that being said,
Any help and direction is greatly appreciated.

Thanks,
  Reply With Quote
Old 11th August 2012, 09:53 PM   #2
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
Post a photo of the board.
  Reply With Quote
Old 11th August 2012, 10:12 PM   #3
diyAudio Member
 
Join Date: Apr 2012
Location: SouthEast
As much as I know that you do not like them, these were taken with a cell phone. It is the only thing I have at my disposal until much later.

Thanks,

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

There is also a small circuit board that is not pictured that sits elevated on the end with the RCA's. I think it is the crossover section because it has the swithech for that on it (and the bass know input).
  Reply With Quote
Old 12th August 2012, 11:46 AM   #4
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
Is there a small transistor directly connected to pin 16 of the TL494?
  Reply With Quote
Old 12th August 2012, 06:47 PM   #5
diyAudio Member
 
Join Date: Apr 2012
Location: SouthEast
No,

In the third picture from the top, pin 16 is in the lower right corner. Just below it is a capacitor. To the right of the capacitor is a Zener Diode and to the left are two light blue resistors. These are all connected to pin 16 by a trace on the bottom of the board.

Here are the component markings and board designations
Zener - 48 - D6
Cap - 104 100V - C1
Res - brown, black, red, gold, brown - which I interpret 1000 5% 1% - R50
Res - brown, red, brown, gold, brown 120 5% 1% - R3

I may be interpreting the values wrong.
  Reply With Quote
Old 12th August 2012, 11:04 PM   #6
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
Desolder 1 leg of the diode (not likely a zener and likely marked 1N4148). Does that allow the amp to power up?

I strongly recommend clamping all semiconductors tightly to the heatsink and inserting a 10-15 amp fuse or a current limiter inline.
  Reply With Quote
Old 13th August 2012, 12:50 AM   #7
diyAudio Member
 
Join Date: Apr 2012
Location: SouthEast
With 1 leg of the diode desoldered & removed, the amp powers up and does not flash the red protect light, it just stays Green.
  Reply With Quote
Old 13th August 2012, 01:45 AM   #8
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
Does that diode connect to a transistor in the audio section of the amp? There may be a resistor in series between the diode and transistor.
  Reply With Quote
Old 13th August 2012, 02:24 AM   #9
diyAudio Member
 
Join Date: Apr 2012
Location: SouthEast
The trace connects to two capacitors and a resistor and it ends at an emitter (left leg) of a 2N 4401 (Q6). This transistor is located in the middle of 3 rows below the IC, last on the right (third picture from the top).

The capacitors and resistor jumps to another trace that connects to another emitter of a 2N 4401 (Q9). Two more capacitors and a jumper are also connected to this trace. This transistor (and the two capacitors) are in the bottom of the three rows and is located just above the top right yellow capacitor.
  Reply With Quote
Old 13th August 2012, 04:22 PM   #10
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
Reinstall the diode and remove Q6 and Q9, one at a time. Which one, when removed, allows the amp to power up?

Can you post better photos for this area of the board so that the circuit board designations are legible?
  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
Kicker ZX.750 Cycling in&out of protect mode shawn111493 Car Audio 26 19th June 2012 02:23 PM
Kicker 650.4 in protect torisspacedog Car Audio 13 4th May 2012 07:58 PM
kicker kx800.4 stuck in protect mode ivkata Car Audio 4 15th December 2011 01:28 AM
Amp keeps going into protect mode... legalizeeit 420 Car Audio 30 19th December 2010 09:24 PM
Mcintosh mc440m in protect mode LANNYMAN73 Car Audio 3 20th October 2010 01:22 AM


New To Site? Need Help?

All times are GMT. The time now is 10:40 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