From my research so far this I think I'm going to struggle with this, so 'll grateful if anyone has suggestions...
About 2 years ago (life's been busy...) I made one of ML Summits blow fuses after bu**#ring it up with a toaster, and I've just got round to diagnosing and and trying to fix it.
The overall symptoms now are that it blows the fuse in the mains cable as soon as you turn the mains on.
Having at last got round to opening the back, it contains a stack of 3 circuit boards - active crossover board for the bass drivers and 2x icepower. Each Summit has 2 bass drivers - one firing forwards and one downwards. Each is driven by its own ICEpower 200ASC. The mains only goes into the 2 Icepowers. The icepowers also provide a low voltage power supply output, and these are used to provide power to the active crossover board and thus the rest of the speaker.
I haven't yet confirmed that one (or both) of the icepowers is (are) faulty, but it's certainly pointing that way.
So my problem is getting hold of replacement 200ASC or 300ASC - the 300ASC is a more powerful pin-compatible replacement. They seemed to be comparatively readily available this time last year - IIRC, that was the time Fox threw together some power amps using the 300ASC modules. But there doesn't seem to be anything about now. I know I've just missed an 200ASC on ebay from Germany - it was available when I searched earlier this week but is now "out of stock"
So whilst I carry on with the diagnosis, I need to find a replacement module.
If it's the only way of getting hold of a module, then I think I'd be quite happy with someone handling this as a repair (IE I pay someone to fix it instead of DIY) if they can source the amp module, as long as it's not at an extortionate price.
Thoughts, ideas, suggestions all welcome.
Thanks
(For those of you interested in how a toaster can blow an amplifier..
The toaster we had at the time had decided it was reaching end of life, and wouldn't always latch down (a little electromagnet holds the toaster latched down, the timer circuit keeps the electromagnet in circuit and breaks the circuit when it's decided the toast has had enough) and it could be persuaded to latch if you repeatedly and rapidly pushed the toast down using the normal handle. One one occasion: after a few pumps on the handle, the new house wiring - now with circuit breakers and RCDs instead of the old fuse box - tripped. Unfortunately, the repeated cycling and rapid breaking of current through the toaster's heater element (coil) is akin to using a coil within a car to generate a spark (high voltage) from a 12V supply. IE. I successfully used the toaster to generate a voltage spike on the mains)
About 2 years ago (life's been busy...) I made one of ML Summits blow fuses after bu**#ring it up with a toaster, and I've just got round to diagnosing and and trying to fix it.
The overall symptoms now are that it blows the fuse in the mains cable as soon as you turn the mains on.
Having at last got round to opening the back, it contains a stack of 3 circuit boards - active crossover board for the bass drivers and 2x icepower. Each Summit has 2 bass drivers - one firing forwards and one downwards. Each is driven by its own ICEpower 200ASC. The mains only goes into the 2 Icepowers. The icepowers also provide a low voltage power supply output, and these are used to provide power to the active crossover board and thus the rest of the speaker.
I haven't yet confirmed that one (or both) of the icepowers is (are) faulty, but it's certainly pointing that way.
So my problem is getting hold of replacement 200ASC or 300ASC - the 300ASC is a more powerful pin-compatible replacement. They seemed to be comparatively readily available this time last year - IIRC, that was the time Fox threw together some power amps using the 300ASC modules. But there doesn't seem to be anything about now. I know I've just missed an 200ASC on ebay from Germany - it was available when I searched earlier this week but is now "out of stock"
So whilst I carry on with the diagnosis, I need to find a replacement module.
If it's the only way of getting hold of a module, then I think I'd be quite happy with someone handling this as a repair (IE I pay someone to fix it instead of DIY) if they can source the amp module, as long as it's not at an extortionate price.
Thoughts, ideas, suggestions all welcome.
Thanks
(For those of you interested in how a toaster can blow an amplifier..
The toaster we had at the time had decided it was reaching end of life, and wouldn't always latch down (a little electromagnet holds the toaster latched down, the timer circuit keeps the electromagnet in circuit and breaks the circuit when it's decided the toast has had enough) and it could be persuaded to latch if you repeatedly and rapidly pushed the toast down using the normal handle. One one occasion: after a few pumps on the handle, the new house wiring - now with circuit breakers and RCDs instead of the old fuse box - tripped. Unfortunately, the repeated cycling and rapid breaking of current through the toaster's heater element (coil) is akin to using a coil within a car to generate a spark (high voltage) from a 12V supply. IE. I successfully used the toaster to generate a voltage spike on the mains)