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Author Topic: 3TM mod MP-1 preamp turns off by itself  (Read 5088 times)

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MarshallJMP

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Re: 3TM mod MP-1 preamp turns off by itself
« Reply #15 on: Time Format »
Do you have some soldering experience?
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Hamer95USA

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Re: 3TM mod MP-1 preamp turns off by itself
« Reply #16 on: Time Format »
Yes. What do you have in mind? Do you know what's wrong with my 3TM mod MP-1 preamp? Do you have a diagram for me?

                                                                                                                                                 Guitar George
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MarshallJMP

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Re: 3TM mod MP-1 preamp turns off by itself
« Reply #17 on: Time Format »
Well I would start with changing the 3300uF/16V cap (big cap) near the transformer and the 2 diodes (1N4007) next to the 6 pin red connector.

Also check the 78ML05 for cracked solder joints (top and bottom side). Reflow if possible.
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