Service manual

Audioaccess TECHNICAL MEMO by madrigal audio labs
2081 S. Main St, Middletown, CT 06457 Ph: 888-691-4171, 860-346-0896... Fx: 860-346-1540...
PX-600 EPROM CHANGE
CAUTION - Be sure to ground yourself before performing this
procedure!! This is a static sensitive device.
To change the EPROM in a PX-600 - Make sure to follow the ESD
Warning on the page 1, provided. Take off the top cover and look for U803
on the main circuit board. With an IC puller or a small screwdriver, very
carefully remove the old EPROM. Replace the new EPROM in the same
location and make sure that notch in the IC is facing the same direction as
the old one. You can also verify this by the drawing on the PCB. Replace the
top cover with the same screws in the proper locations.
Hook up the programmer and power up the PX-600. Go into the
TEST MENU and scroll to DATA RESET, then press ENTER. This will
clear the memory of all IR codes and reset the controller to factory default
settings. You are now ready to configure the system to your client’s needs.
After you finish programming, check each zone for proper operation. If there
are any questions please contact the customer support department at one of
the numbers above.