Directed 650

mike49504 · 15th September 2010, 01:00 PM

I have this amp in for repair.

When powering it up it draws excessive current . So i checked the outputs and found 1 to be shorted.

I replaced the outputs and tryed powering it up same thing . So i replaced the drivers in the amp.

Same thing it will draw excessive current. If i remove 4 of the outputs that get warm when trying to power it up the amp will come on and idle perfect.

The outputs test fine.

Any ideas?

Perry Babin · 15th September 2010, 01:50 PM

If no one else can help, post a photo so I can see what the internals look like.

DcMaN · 15th September 2010, 05:08 PM

I just had the same issue with the directed D800, i replaced all the IRFZ44, both irf540, and both IRF9540, and the amp was back to normal.

mike49504 · 15th September 2010, 05:11 PM

Ill get pics up in a lil bit .

I removed the 2 outputs that get warm the amp will power up then.

Heres the reading i get on the outputs In diode check.

Tip36C
1-2:0.536
1-3:0.539
2-3:OL

Reverse probes
1-2:OL
1-3:OL
2-3:OL

Tip35C
1-2:OL
1-3:OL
2-3:OL

Reverse probes

1-2:0.536
1-3:0.538
2-3:OL

To me it appears the outputs are good.

DcMaN · 15th September 2010, 05:16 PM

I also replaced both rectifiers D55/D56 near the large capacitors i believe they are a FMG22S , and a FMG22R

mike49504 · 15th September 2010, 05:42 PM

I think i found the problem with this amp.

Someone worked on it before and had the wrong drivers in the amp and also had a tip 35c in a 36c's spot.

I will update you when i switch the stuff around

mike49504 · 15th September 2010, 06:04 PM

That was it.

Switched the output to the right one and switched the drivers that were wrong and amp is powerd up and playing perfect.

15th September 2010, 01:00 PM	#1
mike49504 diyAudio Member Join Date: Sep 2006	Directed 650 I have this amp in for repair. When powering it up it draws excessive current . So i checked the outputs and found 1 to be shorted. I replaced the outputs and tryed powering it up same thing . So i replaced the drivers in the amp. Same thing it will draw excessive current. If i remove 4 of the outputs that get warm when trying to power it up the amp will come on and idle perfect. The outputs test fine. Any ideas?

15th September 2010, 01:50 PM	#2
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	If no one else can help, post a photo so I can see what the internals look like. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

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15th September 2010, 05:08 PM	#3
DcMaN diyAudio Member Join Date: Aug 2010	I just had the same issue with the directed D800, i replaced all the IRFZ44, both irf540, and both IRF9540, and the amp was back to normal.

15th September 2010, 05:11 PM	#4
mike49504 diyAudio Member Join Date: Sep 2006	Ill get pics up in a lil bit . I removed the 2 outputs that get warm the amp will power up then. Heres the reading i get on the outputs In diode check. Tip36C 1-2:0.536 1-3:0.539 2-3:OL Reverse probes 1-2:OL 1-3:OL 2-3:OL Tip35C 1-2:OL 1-3:OL 2-3:OL Reverse probes 1-2:0.536 1-3:0.538 2-3:OL To me it appears the outputs are good.

15th September 2010, 05:16 PM	#5
DcMaN diyAudio Member Join Date: Aug 2010	I also replaced both rectifiers D55/D56 near the large capacitors i believe they are a FMG22S , and a FMG22R

15th September 2010, 05:42 PM	#6
mike49504 diyAudio Member Join Date: Sep 2006	I think i found the problem with this amp. Someone worked on it before and had the wrong drivers in the amp and also had a tip 35c in a 36c's spot. I will update you when i switch the stuff around

15th September 2010, 06:04 PM	#7
mike49504 diyAudio Member Join Date: Sep 2006	That was it. Switched the output to the right one and switched the drivers that were wrong and amp is powerd up and playing perfect.

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