Express console not powering and chirping

The information in this post is provided to assist in troubleshooting. Perform work at your own risk. ENSURE ANY POWER FROM DEVICES HAS BEEN DISCONNECTED BEFORE SERVICING ANY EQUIPMENT. If you do not feel comfortable performing the work, please contact us or your local service center. Be aware that ETC and its Affiliates are not responsible for any damage or injury caused by service of our products by anyone other than us or our authorized service providers, and such damage is excluded from the product’s warranty.

On Express consoles where thinnet is not required, PS1 (part number PS113) may be removed and replaced with a load resistor (R518).  The resistor is necessary to provide a dummy load across the 12V line of the power supply to insure proper voltage regulation. A heatsink (HS101) is also required.

After removing PS1, install the load resistor across pins 1 and 3 as shown below.  It’s mounted at an angle so the heatsink is as close to the PCB as possible.

Pin 1 connects to +12VDC, while pin 3 is normally not connected.  Install a jumper on the back side of the board between pin 3 and pin 12 to provide a ground connection.

Make sure that there is sufficient clearance between the heatsink and the wires coming out of the ETClink connector when reassembled.