Luxman L507-Sii

[hnasje]

HI all,
I got a Luxman L507-Sii for repair. The power led keeps blinking (mute).
I can find a lot of Luxman service manuals on the internet but not for this L-507Sii.
Can someone help me with this?
Is there another luxman amplifier that is almost the same?

Thanks for any help you can provide
Hans

 

[mbz]

Blinking power LED normally means the amp has gone into protection, possibly high Vdc on spkr lines.
Maybe measure Vdc at emitter resistors to check this. Will have a look for a manual...

 

[hnasje]

Blinking power LED normally means the amp has gone into protection, possibly high Vdc on spkr lines.
Maybe measure Vdc at emitter resistors to check this. Will have a look for a manual...

Thanks for you reply, seems to be dc voltage on left site. I remove left amp with DC and now the amplifier works !
Don't measure any short on the power transistors, have to dig in deeper.
Schematics would be very helpful.

 

[mbz]

Schematics would be very helpful.

No luck with a schematic. I also checked the buy sites and similiar models, maybe someone will chime in...
It's a big amp, difficult to work on without schematic, can only suggest check for charred parts on left side
then testing of transistors, I'd go with incircuit, expecting a short...