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#1 |
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diyAudio Member
Join Date: Feb 2011
Location: Caceres
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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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#2 |
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diyAudio Member
Join Date: Feb 2011
Location: Caceres
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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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#3 |
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diyAudio Member
Join Date: Feb 2011
Location: Caceres
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Last edited by josesony68; 14th September 2011 at 11:14 PM. Reason: to see if I learn to upload photos ... |
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#4 |
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diyAudio Member
Join Date: Nov 2003
Location: Louisiana
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To upload photos click the following:
Go Advanced Manage Attachments Browse Upload Repeat as necessary Preview post to see how the post will look. Click Submit Reply to send it to the forum.
__________________
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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#5 |
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diyAudio Member
Join Date: Feb 2011
Location: Caceres
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to see if I learn ... Next time, I know thank you very much, Perry
Last edited by josesony68; 14th September 2011 at 11:33 PM. |
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#6 |
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diyAudio Member
Join Date: Nov 2003
Location: Louisiana
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Did you have a question?
You stated that you found defective components and had to order them.
__________________
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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#7 |
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diyAudio Member
Join Date: Feb 2011
Location: Caceres
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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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#8 |
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diyAudio Member
Join Date: Feb 2011
Location: Caceres
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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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#9 |
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diyAudio Member
Join Date: Nov 2003
Location: Louisiana
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You need to solder them back down.
t30001bd schematics
__________________
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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#10 |
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diyAudio Member
Join Date: Feb 2011
Location: Caceres
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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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