chu moy amp help!

ceplos · 13th November 2009, 04:20 PM

i have solder the board, the power suply section today based on tangentsof.net chu moy instruction.. the problem is when i test it on multimeter the power suply does not have any current.. FYI im using different protoboard that recomend on tangen.. is it because the protoboard? or i must get the same proboard that recomend on chumoy?hope u can help me solve this problem.. thanks..

Iain McNeill · 13th November 2009, 04:47 PM

I'm afraid I don't understand you too well.

You say the PSU has no current. Do you mean Voltage? How are you measuring? You can only measure current in circuit with a load. I would test the voltage first.

Most handheld meters have a fuse in the current measuring circuit and 9 times out of 10 it is blown because someone measured volts in the current setting. If you are measuring current correctly and the reading is zero, I'd check the fuse.

ceplos · 13th November 2009, 04:52 PM

yes i mean voltage..

Iain McNeill · 13th November 2009, 05:00 PM

Engineering 101 says:

check it's plugged in
check it's turned on
check the fuses are inserted.

If you have mains AC voltage on the primary of the transformer but no AC voltage on the secondary then the transformer is dead or you connected the windings out of phase.

Start at the mains and work forward until there's no volts. Then you will know where the problem is.

...and don't electrocute yourself

TheSeekerr · 13th November 2009, 11:39 PM

Please post pictures of the top and bottom of your board so we can see what you've done.

13th November 2009, 04:20 PM	#1
ceplos diyAudio Member Join Date: Nov 2009 Location: Selangor..	chu moy amp help! i have solder the board, the power suply section today based on tangentsof.net chu moy instruction.. the problem is when i test it on multimeter the power suply does not have any current.. FYI im using different protoboard that recomend on tangen.. is it because the protoboard? or i must get the same proboard that recomend on chumoy?hope u can help me solve this problem.. thanks..

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13th November 2009, 04:47 PM	#2
Iain McNeill diyAudio Moderator Join Date: Oct 2007 Location: Santa Cruz, California	I'm afraid I don't understand you too well. You say the PSU has no current. Do you mean Voltage? How are you measuring? You can only measure current in circuit with a load. I would test the voltage first. Most handheld meters have a fuse in the current measuring circuit and 9 times out of 10 it is blown because someone measured volts in the current setting. If you are measuring current correctly and the reading is zero, I'd check the fuse.

13th November 2009, 04:52 PM	#3
ceplos diyAudio Member Join Date: Nov 2009 Location: Selangor..	yes i mean voltage..

13th November 2009, 05:00 PM	#4
Iain McNeill diyAudio Moderator Join Date: Oct 2007 Location: Santa Cruz, California	Engineering 101 says: check it's plugged in check it's turned on check the fuses are inserted. If you have mains AC voltage on the primary of the transformer but no AC voltage on the secondary then the transformer is dead or you connected the windings out of phase. Start at the mains and work forward until there's no volts. Then you will know where the problem is. ...and don't electrocute yourself

13th November 2009, 11:39 PM	#5
TheSeekerr diyAudio Member Join Date: Jan 2008	Please post pictures of the top and bottom of your board so we can see what you've done.

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