Help!

mudihan · 5th July 2006, 01:19 AM

I was changing the opamps in my old Ariston CD1 CD player (JRC5532). Initially, it was very successful with 2xOPA627 for each channel. Then I decided to try LT1364s but put them in the wrong direction. Two things happened: 1, the 300ma fuse got blown in about 3 seconds;2, as I put the the 4 opa627 back, one channel is silent while the other is heavily distorted. The CD player still reads CD fine and the coaxial digital-out is working too. So I think that something in the audio output section got blown. The schematic of this player can not be found, but I do have a few pics taken.

http://www.diyaudio.com/forums/attac...amp=1151886640
http://www.diyaudio.com/forums/attac...amp=1151887175

Help me, Please!

Leolabs · 5th July 2006, 01:27 AM

First remove the OPAMPs,then check the voltage at pin 8 and pin 4.

mudihan · 6th July 2006, 03:53 AM

Thanks!

I later tried a couple AD826s and they worked perfectly. Switching back to OPA627s and they work fine too (I decided to use AD826 for SQ). But the LT1364s were burned. I guess someone played a track on me.

So, as long as the voltages at pin4 and pin8 are correct, there is nothing to worry? Just a general question.

Leolabs · 7th July 2006, 03:10 AM

5th July 2006, 01:19 AM	#1
mudihan diyAudio Member Join Date: Jan 2004 Location: Texas	Help! I was changing the opamps in my old Ariston CD1 CD player (JRC5532). Initially, it was very successful with 2xOPA627 for each channel. Then I decided to try LT1364s but put them in the wrong direction. Two things happened: 1, the 300ma fuse got blown in about 3 seconds;2, as I put the the 4 opa627 back, one channel is silent while the other is heavily distorted. The CD player still reads CD fine and the coaxial digital-out is working too. So I think that something in the audio output section got blown. The schematic of this player can not be found, but I do have a few pics taken. http://www.diyaudio.com/forums/attac...amp=1151886640 http://www.diyaudio.com/forums/attac...amp=1151887175 Help me, Please!

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5th July 2006, 01:27 AM	#2
Leolabs diyAudio Member Join Date: Dec 2004 Location: Bukit Mertajam	First remove the OPAMPs,then check the voltage at pin 8 and pin 4.

6th July 2006, 03:53 AM	#3
mudihan diyAudio Member Join Date: Jan 2004 Location: Texas	Thanks! I later tried a couple AD826s and they worked perfectly. Switching back to OPA627s and they work fine too (I decided to use AD826 for SQ). But the LT1364s were burned. I guess someone played a track on me. So, as long as the voltages at pin4 and pin8 are correct, there is nothing to worry? Just a general question.

7th July 2006, 03:10 AM	#4
Leolabs diyAudio Member Join Date: Dec 2004 Location: Bukit Mertajam

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