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Old 22nd July 2007, 10:23 AM   #1
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Default ecler APA1000

I recently acquired an ecler APA 1000 switching mos fet power amplifier and I'm in need of its schematics
and other documentation (white paper,etc.) I tried the companies site but could find any regarding this amp. your help will be greatly appreciated thanks and have a good day everyone.

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Old 26th July 2007, 02:27 PM   #2
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I have the same amplifer, if you find the schematic of apa1000 please send me on my email adres : the_seek2001@yahoo.com; and I have another amplifer from Ecler the model is PAM1400 and if somebody have the service manual I need too, thanks
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Old 23rd July 2012, 10:19 PM   #3
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Hello there, I've got the apa 1400 amp with an odd fault...it's weak on one side ie..
it power's up ok, but when a signal is fed to both channel's only one channel indicator led flickers(green) as normal but channel b's led is not on and a weak ish sound with fuzz is heard?

not had much luck getting the schematic so it looks like it may boil down to using the good channel to compare voltages to sort out this fault...

so far...done dc rail checks..next checked long tail transistor pairs...bias voltage's across emitters are the same on both side's so it looks like possible faulty fets in o/p worse luck there's plenty in there to change out...time to scope it out before jumping down that road as it's a costly one..
so time to plug the signal generator in and scope this one out...

I would lay odds that it may be the o/p's...dam.
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Old 24th July 2012, 06:00 AM   #4
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I would bet on the comparator/modulator section, cause you won't hear that weak audio accompanied by a fuzz if the op fets where blown, a scope would be mandatory to see if you had a "proper" carrier frequency. good luck
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Old 24th July 2012, 05:21 PM   #5
amptech is offline amptech  Scotland
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just to recap on the last statement...it's not the fet's....also swapping the input cable's it still has the fuzzy hum sound...and weak to low o/p signal...

more checks to be done....
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Old 20th August 2012, 12:25 AM   #6
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APA 1000 is mos-fet class AB amp not D, no modulator..
fetīs are IRFP-240, 9240 i think 4 pairs when i remember
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Old 23rd August 2012, 03:23 AM   #7
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Quote:
Originally Posted by Majcco View Post
APA 1000 is mos-fet class AB amp not D, no modulator..
fetīs are IRFP-240, 9240 i think 4 pairs when i remember
noted sir, upon seeing the service manual and opening my unit to see what was it really was yes its a class ab amp, the label "switching power mosfet technology" was a bit misleading how about labeling it a HEXFET power amp
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