K4100

Hi
Can you help with a substitute for the IC 7304. Cant find any datasheet.
My preamp seems to work regarding the frontpanel and alle the keys functions. But no sound (signal) on the line out when putting a signal (CD, Tuner or Tape) on the inputs.
Can you help

We assume you have linked EQ OUT and EQ IN ?

This IC has been obsolete for a couple of years. There are no replacements.
We have a limited stock for repair purposes.
To make sure that only the people who own a K4100 get the spare part, we require that the defective part is returned to:

Velleman Projects Tech. Dept.
Legen Heirweg 33
9890 Gavere
Belgium