|Solid State Talk all about solid state amplification.|
Please consider donating to help us continue to serve you.
Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
||Thread Tools||Search this Thread|
|21st March 2008, 02:21 PM||#1|
Join Date: Jan 2005
Hafler 945 Preamp Issues
I fixed a friends amp the other day and in lieu of payment he gave me a broken Hafler 945 Preamp/Tuner.
Theres a Relay on the preamp board that went bad - I could tap it a few times and the channels would come in fine. I replaced that (12v coil) relay and all was good, but I noticed the balance is tripped up. I have the checked the mono button, and when on, the balance pot has no effect.
But when off, I turn the balance pot all the way to one side, both channels just get a bit fainter.
When I unplug one channel from the inputs, only that channel works as it should.
Seems I may have tripped something up on the balance replacing the relay. But then again it may have been an issue all along and have nothing to do with the relay.
I have also scrubbed down the preamp and PS boards with Alcohol to clean it, and replace the main PS caps...
Anyone have a schematic of the Hafler 945 preamp or know what could be an issues here??
I Speak Spanish to God, Italian to Women, French to Men, and German to My Horse. Charles V
|Thread Tools||Search this Thread|
|Thread||Thread Starter||Forum||Replies||Last Post|
|Schematic for Hafler T3 preamp?||fly135||Instruments and Amps||12||7th September 2016 05:14 PM|
|Hafler DH-101 Preamp||torens147||Solid State||12||22nd May 2012 10:29 PM|
|Hafler 945 JFET Preamp||john65b||Swap Meet||0||10th July 2009 02:52 AM|
|So, I ebayed this Hafler DH-110 preamp...||Bogie||Solid State||3||19th December 2004 11:45 PM|
|Hafler DH 101 preamp mods||Zen Mod||Solid State||6||3rd May 2004 12:24 AM|
|New To Site?||Need Help?|