Team Cactus 7kw - Page 5

Perry Babin · 3rd January 2011, 09:38 AM

What's the circuit board designation of the 7915?

mike49504 · 3rd January 2011, 09:45 AM

Ok out of the amp this is the readings i get on the regulators

7905
1-2:0.548
1-3:0.704
2-3:OL

Probes reversed

1-2:OL
1-3:1.120
2-3:0.551

7805
1-2:0.550
1-3:0.577
2-3:0.914

Probes reversed

1-2:OL
1-3:OL
2-3:0.606

7815
1-2:0.556
1-3:0.570
2-3:OL

probes reversed
1-2:OL
1-3:OL
2-3:0.617

7915
1-2:0.539
1-3:0.716
2-3:OL

Probes reversed
1-2:OL
1-3:OL
2-3:0.532

Do any of theese so far appear to be defective?

Perry Babin · 3rd January 2011, 09:57 AM

I don't think you can determine much this way unless they're shorted or leaking badly.

What's the circuit board designation of the 7915 you originally measured the voltage on?

mike49504 · 3rd January 2011, 10:00 AM

U10

I have to do some checking into this amp now . Now the power light doesnt light up but relays kick on same problem as the other amp i worked on.

Perry Babin · 3rd January 2011, 10:06 AM

When you finish, if you haven't found the problem, find D26-D29, L11 and L12. Do you have DC voltage on both ends of L12?

mike49504 · 3rd January 2011, 10:15 AM

I need one of theese Can i replace them with a mylar cap (104) or do you know a good part number for theese?

Perry Babin · 3rd January 2011, 10:21 AM

Which capacitor?

Was it shorted?

mike49504 · 3rd January 2011, 10:35 AM

Its at the end of the board in front of the 7915 I circled it a lil better now

Thats what i had to replace on the other amp to get the power light to come on.

And yes it reads shorted in both directions

Perry Babin · 3rd January 2011, 10:51 AM

edit

Yes, you can replace it with a mylar.

mike49504 · 3rd January 2011, 11:01 AM

0.1 uf 50 volt?

3rd January 2011, 09:38 AM	#41
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	What's the circuit board designation of the 7915? __________________ Links >> Basic Car Audio Amp Repair * Basic Car Audio Electronics * New Site * Basic Switching Power Supply Design * Basic Computer Skills << Links

3rd January 2011, 09:57 AM	#43
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	I don't think you can determine much this way unless they're shorted or leaking badly. What's the circuit board designation of the 7915 you originally measured the voltage on? __________________ Links >> Basic Car Audio Amp Repair * Basic Car Audio Electronics * New Site * Basic Switching Power Supply Design * Basic Computer Skills << Links

3rd January 2011, 10:06 AM	#45
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	When you finish, if you haven't found the problem, find D26-D29, L11 and L12. Do you have DC voltage on both ends of L12? __________________ Links >> Basic Car Audio Amp Repair * Basic Car Audio Electronics * New Site * Basic Switching Power Supply Design * Basic Computer Skills << Links

3rd January 2011, 10:21 AM	#47
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Which capacitor? Was it shorted? __________________ Links >> Basic Car Audio Amp Repair * Basic Car Audio Electronics * New Site * Basic Switching Power Supply Design * Basic Computer Skills << Links

3rd January 2011, 10:51 AM	#49
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	edit Yes, you can replace it with a mylar. __________________ Links >> Basic Car Audio Amp Repair * Basic Car Audio Electronics * New Site * Basic Switching Power Supply Design * Basic Computer Skills << Links


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3rd January 2011, 09:45 AM	#42
mike49504 diyAudio Member Join Date: Sep 2006	Ok out of the amp this is the readings i get on the regulators 7905 1-2:0.548 1-3:0.704 2-3:OL Probes reversed 1-2:OL 1-3:1.120 2-3:0.551 7805 1-2:0.550 1-3:0.577 2-3:0.914 Probes reversed 1-2:OL 1-3:OL 2-3:0.606 7815 1-2:0.556 1-3:0.570 2-3:OL probes reversed 1-2:OL 1-3:OL 2-3:0.617 7915 1-2:0.539 1-3:0.716 2-3:OL Probes reversed 1-2:OL 1-3:OL 2-3:0.532 Do any of theese so far appear to be defective?

3rd January 2011, 10:00 AM	#44
mike49504 diyAudio Member Join Date: Sep 2006	U10 I have to do some checking into this amp now . Now the power light doesnt light up but relays kick on same problem as the other amp i worked on.

3rd January 2011, 11:01 AM	#50
mike49504 diyAudio Member Join Date: Sep 2006	0.1 uf 50 volt?

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