Crunch gp1600.1

mike49504 · 25th April 2010, 04:06 AM

Im Rebuilding The Power Supply In This Amp. The Rectifiers Are Shorted In It Also. Wondering What A Good Sub Is For Theese?? This Is What's In It Now.

The Numbers I Have Are Off The Board And Rectifier Itself.

C25 40 02C F12C20C

C25 53 02N F12C20A

Perry Babin · 25th April 2010, 04:18 AM

The MUR1620CT and MUR1620CTR should be good subs.

Have you pulled them and confirmed that they're shorted. It's rare that more than one rectifier shorts.

mike49504 · 25th April 2010, 04:59 AM

1 Of Them Is Shorted. The Other Rectifiers IN The Amp Have Broken Legs On Them And Have A Ton Of Solder On Them Looks Like Someone Tryed To Solder The Legs Back Together And Did A Hack Job. So Im Gonna Just Replace Them All.

Perry,

The Next Question Is The Owner Of This Amp Told Me He opened It UP And He Said That The Amp Was Repaired Wrong From A different Shop. He Said That The Resistors Are All Falling Out of The Amp.

I Told Him That was How It Came From THe Factory . He Insist's I Resolder All Of Them .

Wondering How I Can Tell Him That It Wont Effect The Amp IMHO. Or Should I Resolder The Entire Board?? Heres Some Pics Of What Im Talking About

Its Prety Much 3/4 of The resistors On The board Very Time Consuming

Perry Babin · 25th April 2010, 08:46 AM

If he wants to pay you an hourly rate (whatever it's worth to you), do it. If he doesn't, explain that you can't work for hours on something that has no affect on the proper operation of the amp.

mike49504 · 26th April 2010, 03:43 AM

Perry,

Do you by chance know the value of theese resistors?

Perry Babin · 26th April 2010, 03:50 AM

Probably 8.2k ohms. On other crunch amps, it's printed on the board under the resistor.

mike49504 · 26th April 2010, 04:43 AM

Its says 4K7 on the board 4K or 47K ?

Perry Babin · 26th April 2010, 04:56 AM

The K is used in place of the decimal point. It's a 4.7k ohm resistor.

mike49504 · 26th April 2010, 05:01 AM

Thanks Perry,

1 Last question.

some of the outputs are shorted 2SC5200's

Will the 2SC5200-0's work?

Perry Babin · 26th April 2010, 05:27 AM

I would think so since all links to the -0 part led me to the non-0 datasheet. The FJL4215 and FJL4315 will be easier to find. Mouser has them.
http://www.fairchildsemi.com/ds/FJ/FJL4315.pdf

25th April 2010, 04:06 AM	#1
mike49504 diyAudio Member Join Date: Sep 2006	Crunch gp1600.1 Im Rebuilding The Power Supply In This Amp. The Rectifiers Are Shorted In It Also. Wondering What A Good Sub Is For Theese?? This Is What's In It Now. The Numbers I Have Are Off The Board And Rectifier Itself. C25 40 02C F12C20C C25 53 02N F12C20A

25th April 2010, 04:18 AM	#2
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	The MUR1620CT and MUR1620CTR should be good subs. Have you pulled them and confirmed that they're shorted. It's rare that more than one rectifier shorts. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

25th April 2010, 08:46 AM	#4
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	If he wants to pay you an hourly rate (whatever it's worth to you), do it. If he doesn't, explain that you can't work for hours on something that has no affect on the proper operation of the amp. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

26th April 2010, 03:50 AM	#6
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Probably 8.2k ohms. On other crunch amps, it's printed on the board under the resistor. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

26th April 2010, 04:56 AM	#8
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	The K is used in place of the decimal point. It's a 4.7k ohm resistor. __________________ 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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26th April 2010, 04:43 AM	#7
mike49504 diyAudio Member Join Date: Sep 2006	Its says 4K7 on the board 4K or 47K ?

26th April 2010, 05:01 AM	#9
mike49504 diyAudio Member Join Date: Sep 2006	Thanks Perry, 1 Last question. some of the outputs are shorted 2SC5200's Will the 2SC5200-0's work?

26th April 2010, 05:27 AM	#10
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	I would think so since all links to the -0 part led me to the non-0 datasheet. The FJL4215 and FJL4315 will be easier to find. Mouser has them. http://www.fairchildsemi.com/ds/FJ/FJL4315.pdf __________________ 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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