Broken / Missing Eyelets

Rabbi · 11th March 2011, 03:26 PM

Just got a new amp in that a former owner tried to repair (mtx 8100d)
Whats the best way to go about amps with missing eyelets?

Would it be a viable option to just use a wire in between the part with the missing eyelet and the next part in the circuit ?

I've repaired eyelets on much more spread out circuit boards but never on an amplifier, And some of the eyelets are REALLY close to the others. Wondering how to proceed about this?

Rabbi · 11th March 2011, 03:27 PM

the missing eyelets are all on power supply fets if this makes much of a difference

Perry Babin · 11th March 2011, 04:00 PM

Eyelets = solder pads?

Many times, they don't need to be repaired. For double-sided boards, if the solder pad is missing on the side of the board with no trace connected to it, solder from the other side of the board. For pads that are missing pads that are connected to traces, I generally use the legs from 1/8w resistors to make a loop around the leg and then connect to the trace (after removing the solder mask and tinning the trace).

Rabbi · 11th March 2011, 04:04 PM

similar to this :

They are completely lifted out of the hole on the board

Perry Babin · 11th March 2011, 04:13 PM

Are you referring to the plated through-holes (vias)?

If so, that doesn't change much. The repair procedure is the same.

Is this one of the older 81000Ds?

If so, are the outputs blown?

Rabbi · 11th March 2011, 04:17 PM

this is the exact thing im talking about right here, Sorry i couldn't find a picture of it before

Its the chrome 81000d, The outputs are all blown.

Perry Babin · 11th March 2011, 04:20 PM

What is the part number of the output transistors?

Does it have an individual gate resistor for EVERY output transistor?

11th March 2011, 03:26 PM	#1
Rabbi diyAudio Member Join Date: Jan 2011	Broken / Missing Eyelets Just got a new amp in that a former owner tried to repair (mtx 8100d) Whats the best way to go about amps with missing eyelets? Would it be a viable option to just use a wire in between the part with the missing eyelet and the next part in the circuit ? I've repaired eyelets on much more spread out circuit boards but never on an amplifier, And some of the eyelets are REALLY close to the others. Wondering how to proceed about this?

11th March 2011, 04:13 PM	#5
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Are you referring to the plated through-holes (vias)? If so, that doesn't change much. The repair procedure is the same. Is this one of the older 81000Ds? If so, are the outputs blown? __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

11th March 2011, 04:20 PM	#7
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	What is the part number of the output transistors? Does it have an individual gate resistor for EVERY output transistor? __________________ 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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11th March 2011, 03:27 PM	#2
Rabbi diyAudio Member Join Date: Jan 2011	the missing eyelets are all on power supply fets if this makes much of a difference

11th March 2011, 04:04 PM	#4
Rabbi diyAudio Member Join Date: Jan 2011	similar to this : They are completely lifted out of the hole on the board

11th March 2011, 04:17 PM	#6
Rabbi diyAudio Member Join Date: Jan 2011	this is the exact thing im talking about right here, Sorry i couldn't find a picture of it before Its the chrome 81000d, The outputs are all blown.

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