Re: C-Audio RA500 troubleshooting



Helló Amelbye

If you disassemble the transformer, there is a fuse inside the winding on the primary side.
I’ve had a mistake before, but it’s measurable.

As you write, if the value of the resistance changes from heating it can cause a voltage drop, and if there is little capacity, which is on the + -15V terminals of the operational amplifier supply voltage.

The best C-meter is to replace the capacitor.
The problem there is that the C-meters operate at 9V, although capacitor...

Re: LC70lE660U

Hello!

First round below, then later if there will be more information
The supply voltages should be checked first.The following is based on the service manual should be checked
Since the pins are monitored, this can also provide a starting point


Pins are monitor microcomputer pins unless otherwise
specified.
1 flashes once Inverter/Lamp system failure
2 Power PWB failure Flashes twice
Flash once Power supply error AC_DET error

Flash twice Power supply error UR+13.5V error
...

Re: C-Audio RA500 troubleshooting

Hello

It really is different.
unfortunately it is only similar.It may be used in parts.This here C-audio RA 1000. [url]https://audio-circuit.dk/ssmc/[/url]
Or even similar here.[url]https://www.hifiengine.com/manual_library/c-audio.shtml[/url]
Or here [url]https://audio-circuit.dk/ssmc/[/url]Re: C-Audio RA500 troubleshooting<br...dk/ssmc/[/url]

Re: C-Audio RA500 troubleshooting

Hello!

You wrote that you could not find a schematic
if that helps, here is a service manual....