Hi guys and gals
Bare with me this could take a while. I have taken a look at some other posts about this amp but none seem to have the same problem. Unless thats just how I'm reading them.
I have to confess I am no electroics wizz. I did a course as part of my mechanical engineering apprenticship 16 years ago and have not touched anything like it since, just spanner and hammers lol. So short of getting out a big hammer and smashing it to pieces I thought I would ask on here for some help.
The problem. The amp turns on, power relay clicks and lights come on. The issue is with the sound output to the left channel. The right works ok but the left is so quiet you can only hear it with your ear right up to the speaker and volume control turned right up.
Ok so things I have tried. Swapped speakers over, same. Swapped speaker cables, same. Swapped input cable from cd player over, same. Swapped input cable to Aux, same. Mute button on remote works and relay clicks when sound turned off. Ballance control (pot? see it's coming back slowly) in middle position right speaker works, left very quiet. Turned fully right, no increase in volume of right speaker, is this normal? Turned fully left, no sound from right speaker and same very low volume from left speaker. Source direct button bypasses ballance control but makes no difference to left speaker volume. I have taken a look inside the case and there does not appear to be any physical damage or blown components, no signs of burning or residue around any components.
So unless someone happens to know what this problem is I guess I need to dig out a multimeter and have a prod about. How much can I test with the main board still in the amp? What can I test and how? Is it just a case of setting the meter to measure resistance and check each side of the resisters? or will the fact they are in a curcuit affect what I read? Do I do this with power on or off? If on do I need to be playing a cd or something to give the amp something to do? Transisters seem to be a common issue with these amps so what do they look like and how do I test them? What am I looking for? resistance, open curcuit or shorts?
As you can tell I am probably well out of my league here but I am the sort of person who likes to have a go. Besides whats the worst that can happen? Well apart from killing myself. The amp is next to dead anyway so I can't make it worse. Well ok so I could kill the right channel as well, lol. It seems having a copy of the curcuit diagrams would help so if anyone still using this site has a copy it would be appreciated. I do have a few guys at work who mess about with electronic stuff but as their field of expertese is not amps I could do with giving them a few areas to look at before I waste their time working from first principles.
So there you go. Anyone able to throw me a bone? Thanks in advance.
Michael
Bare with me this could take a while. I have taken a look at some other posts about this amp but none seem to have the same problem. Unless thats just how I'm reading them.
I have to confess I am no electroics wizz. I did a course as part of my mechanical engineering apprenticship 16 years ago and have not touched anything like it since, just spanner and hammers lol. So short of getting out a big hammer and smashing it to pieces I thought I would ask on here for some help.
The problem. The amp turns on, power relay clicks and lights come on. The issue is with the sound output to the left channel. The right works ok but the left is so quiet you can only hear it with your ear right up to the speaker and volume control turned right up.
Ok so things I have tried. Swapped speakers over, same. Swapped speaker cables, same. Swapped input cable from cd player over, same. Swapped input cable to Aux, same. Mute button on remote works and relay clicks when sound turned off. Ballance control (pot? see it's coming back slowly) in middle position right speaker works, left very quiet. Turned fully right, no increase in volume of right speaker, is this normal? Turned fully left, no sound from right speaker and same very low volume from left speaker. Source direct button bypasses ballance control but makes no difference to left speaker volume. I have taken a look inside the case and there does not appear to be any physical damage or blown components, no signs of burning or residue around any components.
So unless someone happens to know what this problem is I guess I need to dig out a multimeter and have a prod about. How much can I test with the main board still in the amp? What can I test and how? Is it just a case of setting the meter to measure resistance and check each side of the resisters? or will the fact they are in a curcuit affect what I read? Do I do this with power on or off? If on do I need to be playing a cd or something to give the amp something to do? Transisters seem to be a common issue with these amps so what do they look like and how do I test them? What am I looking for? resistance, open curcuit or shorts?
As you can tell I am probably well out of my league here but I am the sort of person who likes to have a go. Besides whats the worst that can happen? Well apart from killing myself. The amp is next to dead anyway so I can't make it worse. Well ok so I could kill the right channel as well, lol. It seems having a copy of the curcuit diagrams would help so if anyone still using this site has a copy it would be appreciated. I do have a few guys at work who mess about with electronic stuff but as their field of expertese is not amps I could do with giving them a few areas to look at before I waste their time working from first principles.
So there you go. Anyone able to throw me a bone? Thanks in advance.
Michael