DH101 troubleshooting

Stormrider · 27th August 2007, 09:31 PM

Hello everyone.

I recieved a Hafler DH101 pre in semi-working condition . It has a high noise floor (no hum, just noise) and sound does make it through the pre, but it is not fullrange and the vol control has to be turned fully clockwise to get anything.

I have the service manuel.

Now, i have +/- 18v from the power supply, so thats working. I checked to see if any of the tantalum caps had shorted and they okay. Should i go ahead and replace the tantalums and electrolytics in the circuit? With no voltage chart i'm at a loss at where to go from here.

Any suggestions? Thanks.

Leolabs · 28th August 2007, 02:29 AM

What kind of noise??Hiss??

Stormrider · 28th August 2007, 03:02 AM

White noise.

27th August 2007, 09:31 PM	#1
Stormrider diyAudio Member Join Date: Apr 2006 Location: Connecticut	DH101 troubleshooting Hello everyone. I recieved a Hafler DH101 pre in semi-working condition . It has a high noise floor (no hum, just noise) and sound does make it through the pre, but it is not fullrange and the vol control has to be turned fully clockwise to get anything. I have the service manuel. Now, i have +/- 18v from the power supply, so thats working. I checked to see if any of the tantalum caps had shorted and they okay. Should i go ahead and replace the tantalums and electrolytics in the circuit? With no voltage chart i'm at a loss at where to go from here. Any suggestions? Thanks. __________________ AJ

28th August 2007, 03:02 AM	#3
Stormrider diyAudio Member Join Date: Apr 2006 Location: Connecticut	White noise. __________________ AJ

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28th August 2007, 02:29 AM	#2
Leolabs diyAudio Member Join Date: Dec 2004 Location: Bukit Mertajam	What kind of noise??Hiss??

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