XM-1502SX Idle Current

sdoom · 7th July 2004, 06:50 PM

Hi @ all

I have a Sony XM-1502SX XPlod amp. There were two FET in the audio curcuit that caused a short. I replaced the FET and hooked the amp to my 12V power supply using a 6.8Ohm resistor in series to prevent the amp if the power supply was bad. Ok, no more overcurrent or warning lights anymore.

So I connected the amp to 12VDC without the resistor in series and turned it on. When the Sony is turned on it draws a 4 Ampere idle current.

The idle current is not stated in the user´s manual. Does anyone have specs on that amp ? I know of some older JBL/Harman amplifiers that idle currents with more than 3Ampere .....

What else could I check ? The rectifier diodes are ok and each capacitor reading was 2200µF so they should be fine,too.

Thx

Steph

sdoom · 9th July 2004, 07:35 AM

Ok I got it. There was still a broken FET in the other channel. It didn´t have a real short but had a permanent low resistance between S and D.

Replaced the one, adjustet idle . Tested ok

DC-current w/o load is now aprox. 1.5A

7th July 2004, 06:50 PM	#1
sdoom diyAudio Member Join Date: Mar 2004 Location: Heidelberg	XM-1502SX Idle Current Hi @ all I have a Sony XM-1502SX XPlod amp. There were two FET in the audio curcuit that caused a short. I replaced the FET and hooked the amp to my 12V power supply using a 6.8Ohm resistor in series to prevent the amp if the power supply was bad. Ok, no more overcurrent or warning lights anymore. So I connected the amp to 12VDC without the resistor in series and turned it on. When the Sony is turned on it draws a 4 Ampere idle current. The idle current is not stated in the user´s manual. Does anyone have specs on that amp ? I know of some older JBL/Harman amplifiers that idle currents with more than 3Ampere ..... What else could I check ? The rectifier diodes are ok and each capacitor reading was 2200µF so they should be fine,too. Thx Steph

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9th July 2004, 07:35 AM	#2
sdoom diyAudio Member Join Date: Mar 2004 Location: Heidelberg	Ok I got it. There was still a broken FET in the other channel. It didn´t have a real short but had a permanent low resistance between S and D. Replaced the one, adjustet idle . Tested ok DC-current w/o load is now aprox. 1.5A