Extron electronic MLS 304 Remove hex nuts, A PCB with part #20-730-xxx uses an 8-pin power output

7. Remove and discard the two standoff hex nuts on the underside of the replacement power supply board as shown below. Do not discard the stand- offs to which the hex nuts were threaded or the power supply insulator and the two attaching screws.

Remove hex nuts (2).

8. If the switcher is an MLS 304 or MLS 406, proceed to step 8a. If the switcher is an MLS 306, proceed to step 8b.

8a. Check the part number on the switcher’s PCB. The part number indicates which power output cable to use with the replacement power supply. The replacement power supply is shipped with the 8-wire cable attached.

A PCB with part #20-730-xxx uses an 8-pin power output

connector. Use the installed 8-wire output cable on the replacement

power supply.

A PCB with part #20-601-xxx uses a 6-pin power output connector. Remove the installed

output cable on the replacement power supply and use the optional 5-wire output cable included in

the kit.

If the optional 5-wire power output cable needs to be installed, replace the power supply’s power output cable with the cable shown below.

A switcher PCB with part #20-601-xxx and the MLS 306’s PCB both use a 6-pin power output connector. Install the included optional 5-wire output cable on the replacement power supply for either switcher.

8b. The MLS 306 switcher requires that the included optional 5-wire power output cable be installed on the replacement power supply. See the previous cable illustration.

NThe MLS 306 switcher’s PCB part number is not readily viewable because of the multi-board arrangement. However, the MLS 306 uses a

6-pin power input connector, as shown` in the illustration below, and requires that the replacement power supply’s optional 5-wire output cable be used.

The MLS 306 uses a 6-pin power input connector on its PCB.

9. Secure the replacement power supply to the switcher’s PCB using two of the screws from step 6 and the two standoffs from step 7. The screws and standoffs screw into the holes where the original power supply was attached. See the following illustration.