LEM T4A / D400 Amp Modules |
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mrspeedy
Young Croc Joined: 23 July 2011 Location: Cambridge UK Status: Offline Points: 511 |
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Posted: 06 March 2012 at 10:35pm |
Hi guys,
I have a load of LEM active cabs all with the same amp units and also the same faults. All of the units power up. When sent 0dB and with the gain control at full level, the sound is barely noticeable and very distorted. The T4's in particular tend to pop, click and hiss by themselves without audio connected, but otherwise display the same symptoms as the D400 units. I have read that the EEPROM chip holder can become dry jointed and cause dsp problems, so on one of the units (from a d400) I soldered the chip directly to the board. Still no luck. Any ideas on what the fault could be? Regards, Toby |
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Beatfreak
Registered User Joined: 09 March 2005 Location: United Kingdom Status: Offline Points: 201 |
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I have the same problem with a T4a, did you get anywhere with finding a solution for it?
I like the sound of the speakers but it's no good having only one to use. I've even tried looking for a spare amp unit as it's the same for both the d400 and the T4a but no luck. I did even mange to speak to a company called fw greenhill and they were the uk distributors of LEM stuff and they tell me that GEM the parent company went into administration some years ago. They tried a repair but with no luck and when I found the schematic drawings for the module they told me it was unlikely it would be econmically sensible to try and repair!! Shame, so I keep looking for single speakers avaiable on ebay totake the module from.
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sound designs for sound individuals
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jimi13243
Registered User Joined: 03 June 2014 Location: West Midlands Status: Offline Points: 77 |
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You might like these http://www.gumtree.com/p/for-sale/lem-t6aactive-speakers3-waymade-in-italy1200w-pair/1073705098
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Peace and dub
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Dgr12345
New Member Joined: 23 November 2021 Location: Cuba Status: Offline Points: 3 |
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Greetings ,, I need the drawing of the lem t4a amplifier ,,,, to be able to repair mine
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Dgr12345
New Member Joined: 23 November 2021 Location: Cuba Status: Offline Points: 3 |
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The schematic plan
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Dgr12345
New Member Joined: 23 November 2021 Location: Cuba Status: Offline Points: 3 |
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would you be so kind to give me the schematic of the lem t4a
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