Power Acoustik A3000db - DC on output while remote off

Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
Jump to Latest
I

imraneesa

Member
Joined 2016
Perry Babin said:
Is pin 7 of 302 transitioning instantaneously after the mute delay and when the remote is removed?

Does the pop occur (normally) every time the amp is switched off or only after it's switched on/off quickly (as when the vehicle is started)?
Click to expand...

just after the mute pin 7 read 3.6v and as soon as remote removed it went back to zero.
the pop occurs every time the remote is removed.
 
I

imraneesa

Member
Joined 2016
Perry Babin said:
Quick isn't instantaneous. If looking at the voltage on your scope, the voltage should go from high to low and low to high as a straight vertical line.
Click to expand...

yes i just checked with scope it is a straight vertical line. it is changing instantaneous.
 

Attachments

  • 20180929_065751.jpg
    20180929_065751.jpg
    980.2 KB · Views: 60
Last edited:
I

imraneesa

Member
Joined 2016
Perry Babin said:
If it was quiet when you shorted the pins of the opto-coupler, it should mean that everything beyond the opto-coupler is OK. This drives the opto-coupler and is switching as it should. Q305 and a couple of resistors are the only things between the comparator and the opto-coupler.
Click to expand...

i have changed 302 and Q305 and it solved the problem. both actually looks fine but dont know what was the problem. big headache gone. Thank you very much for your time and kind help.
 
Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
Top Bottom