Re: Logitech Z506 power supply

OK, from the beginning ...

When I got these z506, no sound was comming out of the speakers.
Not even the background noise from the power supply (50Hz).
Possibly muted ?

First thought was the power supply. But that was ok. I replaced it
by a external power supply unit with current limitation.

I connected the right front speaker which has the power switch.
When the volume control was completly turned to the left, the power
consumption was 40mA. When turning it to the right,...

Re: Logitech Z506 power supply

Hello,

I am new to this forum and I'm not sure if I
should attach my problem to this threat.

I just got a defective Z-506, the power supply is ok (hopefully
long). On the amplifier board two of the SO-8 IC get hot when
powering up the system.

In the picture I marked both Ic with a red box.

IC4 is a MC4558 (OpAmp).
IC 402 is a LM385 (Reference Voltage?)

Can someone make a scan or something similar from his
board for me? The pinout of an LM385...