Fixing Alpine-3554 - Page 5

ben_lesmana · 3rd November 2009, 03:05 PM

Hello,

I would think 1 regulator is evaporated, and also 2 mid sized caps. So chain of events are: Capacitor failing, exploded, regulator failed, heating and explode the area?

I keep wondering how it can get so much energy to evaporate that much area. The left over are black hardened gel (?) Hard to describe, on the heat sink.

Would anyone have a high-res picture of that area? Front side and backside? Im still considering whether I have enough experience to fix something like this.

Thanks everyone,
Ben

Perry Babin · 3rd November 2009, 07:29 PM

I don't think your capacitors exploded unless you spent a lot of time cleaning up the area. When electrolytic capacitors explode, it looks like the mess in the attached photo.

That gel is likely melted epoxy resin.

jol50 · 3rd November 2009, 09:52 PM

The 3555 hole is from the rails. The rails go right through there on traces to the regulators. The bars take power over the top for the amp, but the traces burn to each other and roast the board there. The transistors start it for whatever reason, the caps were fine in mine. Most small caps blow and nothing much is left.

hottub · 27th November 2011, 08:27 AM

Hi

Has anybody managed to come across a circuit diagram for this yet?

regards

mark

Perry Babin · 27th November 2011, 01:31 PM

Email me.

babin_perry@yahoo.com

bjdd · 7th April 2012, 06:33 AM

please has someone got circuit diagram for dap600 i changed outputs used 2n3773 and 2n2955 external current is good and heavy

27th November 2011, 08:27 AM	#44
hottub diyAudio Member Join Date: Sep 2011 Location: London	Alpine 3554 Schematic Hi Has anybody managed to come across a circuit diagram for this yet? regards mark

27th November 2011, 01:31 PM	#45
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Email me. babin_perry@yahoo.com __________________ 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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3rd November 2009, 03:05 PM	#41
ben_lesmana diyAudio Member Join Date: Sep 2008	Hello, I would think 1 regulator is evaporated, and also 2 mid sized caps. So chain of events are: Capacitor failing, exploded, regulator failed, heating and explode the area? I keep wondering how it can get so much energy to evaporate that much area. The left over are black hardened gel (?) Hard to describe, on the heat sink. Would anyone have a high-res picture of that area? Front side and backside? Im still considering whether I have enough experience to fix something like this. Thanks everyone, Ben

3rd November 2009, 09:52 PM	#43
jol50 diyAudio Member Join Date: Nov 2007	The 3555 hole is from the rails. The rails go right through there on traces to the regulators. The bars take power over the top for the amp, but the traces burn to each other and roast the board there. The transistors start it for whatever reason, the caps were fine in mine. Most small caps blow and nothing much is left.

7th April 2012, 06:33 AM	#46
bjdd diyAudio Member Join Date: Jan 2012	please has someone got circuit diagram for dap600 i changed outputs used 2n3773 and 2n2955 external current is good and heavy

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