Memphis 16-mc3004 pops fuses - Page 2

StillLearning · 10th January 2012, 02:12 AM

Figured I would replace them, but ill check them with a DMM to make sure they still hold the same ohm value. If they do Ill toss them back in. Just seems right to replace parts that smoke up. I'm a mechanic and work on h-60b helos for the navy, so its natural for me to replace parts that look damaged or worn, lol.

Perry Babin · 10th January 2012, 02:22 AM

A bit different type of repair. An amp isn't going to drop out of the air from 10,000ft.

StillLearning · 10th January 2012, 02:32 AM

Hmm, good point.

Ok, replacing the transistors so heres a pic of it.

Thinking one of these-
Digi-Key - IRF540ZPBF-ND (Manufacturer - IRF540ZPBF)
or
Digi-Key - IRF540PBF-ND (Manufacturer - IRF540PBF)

Perry Babin · 10th January 2012, 02:38 AM

I'd recommend the non-Z version. It's best to use the original part number unless there is a known reason not to do so.

StillLearning · 10th January 2012, 02:43 AM

sounds good. I know I am full of questions, but what difference does the "Z" make? I like to understand the parts i replace, mechanic or electric.

Perry Babin · 10th January 2012, 02:44 AM

It's just a different version of the same basic part. In general it performs the same but sometimes minor differences make a big difference (i.e. IRF540N in place of the IRF540 in Rockford amps).

StillLearning · 10th January 2012, 02:50 AM

Oah, and is there anything else I should check before ordering the parts for this amp and the JL?

StillLearning · 15th January 2012, 01:39 AM

Replaced the transistors and shes working on bench, so tomorrow I will hook her up and see if theres any problems on putting power through it.

10th January 2012, 02:22 AM	#12
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	A bit different type of repair. An amp isn't going to drop out of the air from 10,000ft. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

10th January 2012, 02:38 AM	#14
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	I'd recommend the non-Z version. It's best to use the original part number unless there is a known reason not to do so. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

10th January 2012, 02:44 AM	#16
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	It's just a different version of the same basic part. In general it performs the same but sometimes minor differences make a big difference (i.e. IRF540N in place of the IRF540 in Rockford amps). __________________ 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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10th January 2012, 02:12 AM	#11
StillLearning diyAudio Member Join Date: Jan 2012	Figured I would replace them, but ill check them with a DMM to make sure they still hold the same ohm value. If they do Ill toss them back in. Just seems right to replace parts that smoke up. I'm a mechanic and work on h-60b helos for the navy, so its natural for me to replace parts that look damaged or worn, lol.

10th January 2012, 02:32 AM	#13
StillLearning diyAudio Member Join Date: Jan 2012	Hmm, good point. Ok, replacing the transistors so heres a pic of it. Thinking one of these- Digi-Key - IRF540ZPBF-ND (Manufacturer - IRF540ZPBF) or Digi-Key - IRF540PBF-ND (Manufacturer - IRF540PBF)

10th January 2012, 02:43 AM	#15
StillLearning diyAudio Member Join Date: Jan 2012	sounds good. I know I am full of questions, but what difference does the "Z" make? I like to understand the parts i replace, mechanic or electric.

10th January 2012, 02:50 AM	#17
StillLearning diyAudio Member Join Date: Jan 2012	Oah, and is there anything else I should check before ordering the parts for this amp and the JL?

15th January 2012, 01:39 AM	#18
StillLearning diyAudio Member Join Date: Jan 2012	Replaced the transistors and shes working on bench, so tomorrow I will hook her up and see if theres any problems on putting power through it.

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