I've just bought a Sony HA-55 phono head amp, and there's a problem with the left channel. Somehow the bass is missing and I'm wondering what can cause that in a head amp (there might also be a minor volume difference).
I've got the schematics (and parts list) so I can test if all components are working according to specifications.
Would appreciate however if somebody could point me in the right direction of where to start.
Thanks!
I've got the schematics (and parts list) so I can test if all components are working according to specifications.
Would appreciate however if somebody could point me in the right direction of where to start.
Thanks!
I would assume given that it is over 30yrs old it is due for full electrolytic cap replacement at minimum..
http://www.thevintageknob.org/SONY/sonyesprit/HA55/HA55.html
http://translate.google.com/translate?hl=en&sl=ja&u=http://mijinko.jp/component/HA-55.html&ei=rWRRTeHyNsWBlAftrtn2Cg&sa=X&oi=translate&ct=result&resnum=1&ved=0CBkQ7gEwADgU&prev=/search%3Fq%3DSony%2BHA-55%26start%3D20%26hl%3Den%26sa%3DN%26prmd%3Divns
http://www.thevintageknob.org/SONY/sonyesprit/HA55/HA55.html
http://translate.google.com/translate?hl=en&sl=ja&u=http://mijinko.jp/component/HA-55.html&ei=rWRRTeHyNsWBlAftrtn2Cg&sa=X&oi=translate&ct=result&resnum=1&ved=0CBkQ7gEwADgU&prev=/search%3Fq%3DSony%2BHA-55%26start%3D20%26hl%3Den%26sa%3DN%26prmd%3Divns
Last edited:
Any idea how I can upload a PDF file? (schematics)
Or take a screen of the pdf like this and post as a .jpg
Attachments
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
- Home
- Source & Line
- Analogue Source
- Sony HA-55 Head Amplifier