Rockford Fosgate Power 851X repairing - diyAudio
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Old 14th September 2011, 04:57 PM   #1
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Default Rockford Fosgate Power 851X repairing

Well, I'm here again (how heavy!, Some might say)
I just got this four-channel 851X, I set out to repair.
Nothing else connected (with audio) two channels on one side, low and completely distorted sound.
The other two channels on the other side: one works well, and the other dumps me all the current in the coil of the speaker.
So, I will ensure that pieces are in poor condition.
Any suggestions?
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Old 14th September 2011, 06:14 PM   #2
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Well, at first glance, Q110 and Q123 shorted (IRF540) I have only new one to replace (grrr, I have to buy more).
Then, checking voltages, with the probes, has escaped me and I made ​​contact on pin 1 and pin 2 of Q6 (IRF3205) and jumped the fuse (grgrr, what big hands I am!)
I have to order these parts out of my city, and late in coming ...
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Old 14th September 2011, 11:02 PM   #3
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Default Rockford power 851X

http://i1202.photobucket.com/albums/...DSCN2869.jpgto

Last edited by josesony68; 14th September 2011 at 11:14 PM. Reason: to see if I learn to upload photos ...
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Old 14th September 2011, 11:11 PM   #4
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Old 14th September 2011, 11:30 PM   #5
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Default Rockford power 851X

to see if I learn ... Next time, I know thank you very much, Perry
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File Type: jpg DSCN2869.JPG (93.5 KB, 68 views)

Last edited by josesony68; 14th September 2011 at 11:33 PM.
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Old 14th September 2011, 11:52 PM   #6
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Did you have a question?

You stated that you found defective components and had to order them.
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Old 14th September 2011, 11:59 PM   #7
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Yes indeed, I just ordered the components, and until the place and see what happens, I will not ask you questions, sorry ... soon.
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Old 15th September 2011, 04:09 PM   #8
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What do you think I am using adhesive to glue the transistors to the mesh?

Pattex
Nural 21
Cold Metal Welding

Welding repair in cold, high resistance, especially formulated to bond and repair metal.
maximum strength

properties
Mixing time: 40 minutes are available for mixing and applying the product.
Processing time: 3 hours.
Curing time: Within 12 hours resists 100 kg/cm2.
Tensile shear (according to EN 1465): 160 kg/cm2 (24 hours, 23 º C, steel).
Resistance to temperature: From -30 º C to +150 º C.
Dielectric strength (UNE 53 030): 10.5 kV / mm.
Expansion coefficient (UNE 53 126) 6.43 x 10-5.
Términca conductivity coefficient (UNE 92 202) 0.15 kcal / hm ° C.
Liquid-resistance: Waterproof, oil and common solvents. Also resistant to dilute acids and alkalis.
It contains no solvents and does not alter its volume to harden.
Product Color: Grey.
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File Type: jpg SSCN2880.JPG (60.7 KB, 54 views)
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Old 15th September 2011, 04:25 PM   #9
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You need to solder them back down.
t30001bd schematics
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Old 15th September 2011, 04:45 PM   #10
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According .... then ..... I have to undo all this ...
And my question is: why the mark (rockford) uses an adhesive to bond all the Mehsa mosfet?
(Sorry for my ignorance)
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