So I have two of these great amps, and I opened one up to replace the lamps. Lo and behold, there were two wire connections leading to nowhere. So I opened the other unit, which is working fine, only to see a daughter board that is missing from the first.
Does anyone have any ideas? If I need to replace this to get the lights working, anyone have a sense as to where to go?
Thanks for your help!
Does anyone have any ideas? If I need to replace this to get the lights working, anyone have a sense as to where to go?
Thanks for your help!
Attachments
That board is just for the meter movement itself, nothing to do with the lamps which have their own board. The lamps are switched manually via a switch and also via a relay RY801.
The full service manual is available from here, its free to register and download.
Sony TA-N77ES - Manual - Stereo Power Amplifier - HiFi Engine
The full service manual is available from here, its free to register and download.
Sony TA-N77ES - Manual - Stereo Power Amplifier - HiFi Engine
Attachments
Thanks very much for that
Thanks for that insight. Of course, that implies that even lit, the meters won't move without this board.
Any idea on where to get a replacement?
Thanks for that insight. Of course, that implies that even lit, the meters won't move without this board.
Any idea on where to get a replacement?
This is about the simplest circuit possible. First, you could extend the 2-wire lead plugs CNJ710 etc. direct to each meter's terminals using short lengths of solid wire that fit the connectors firmly for reliable contact. Follow this with connecting replacement capacitors across the meter terminals in the the same way. The caps will be polarized so follow the diagram showing where + goes, which appears to be the right side terminal as you view the meters and their (missing) boards from the rear. If the leads are long enough, you can wrap them around the meter terminal posts and clamp them with nuts/washers. Otherwise, solder the capacitor leads at the connector end where the leads are close together.
Replacement capacitor quality is unimportant here, so long as it's fresh stock, the 33uF capacitance rating matches well enough and the voltage rating is 25V or so. You can buy either radial or axial lead caps if they suit you better with their different lead spacings.
Replacement capacitor quality is unimportant here, so long as it's fresh stock, the 33uF capacitance rating matches well enough and the voltage rating is 25V or so. You can buy either radial or axial lead caps if they suit you better with their different lead spacings.
Last edited:
- Status
- Not open for further replies.