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Components and Circuits For discussions about component types, alternatives and availability, circuit configurations and modifications etc. Discussions here should be of a general nature and not about specific sets.

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Old 29th Nov 2019, 1:25 am   #1
joebog1's Avatar
Join Date: Jun 2015
Location: Mareeba, North Queensland, Australia
Posts: 969
Default Laney IRT15H

I am working on a Laney guitar amp. I just wish to post some pics regarding removal of the circuit board.

The two pictures are pretty self explanatory, so to explain why I have posted this is as follows:

The pilot lamps ( two of them ) are soldered into the BOTTOM of the PCB. The (led) lamp itself is hot glued to the chassis. Which is removed first?

The 16 way header is GLUED into the socket!!! at BOTH ends. I guess it makes for a "solid" (sic) connection, but how is it removed??

I have seen some dodgy bodgy "fixes" before but I had to share this one.
Note also the large amount of SMD components!!

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Old 30th Nov 2019, 10:26 am   #2
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Join Date: Jan 2008
Location: Sheffield, South Yorkshire, UK.
Posts: 230
Default Re: Laney IRT15H

Hi Joe,
It looks like hot melt glue. If so, I find brushing the bond with isopropyl alcohol works. It doesn't totally dissolve the glue, but softens it, allowing you to peel it off. It usually takes a couple of applications.
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Old 30th Nov 2019, 10:40 am   #3
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Location: Wiltshire, UK.
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Default Re: Laney IRT15H

To my eyes that looks like some quite-sensible and cheap "roadie-proofing"!

Not exactly tour-grade, but good-enough. Amps and cabs have a hard life on the road (beer-cooled amplifiers were a regular thing).
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Old 30th Nov 2019, 5:22 pm   #4
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Join Date: Jul 2008
Location: Maidenhead, Berkshire, UK.
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Default Re: Laney IRT15H

Hot melt glue cooled down tends to snap off, pop it in the freezer (if it fits) or outdoors overnight.
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Old 30th Nov 2019, 6:28 pm   #5
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Location: Staffordshire Moorlands, UK.
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Default Re: Laney IRT15H

I soften hot melt glue with a heat gun on a low setting, allowing stuff to just pull out.
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