I have just replaced the 5Volt regulators and fixed the no input on channels 1-12 problem on my 16.0.2.
This is how to do it you will need 2x 5volt regulators the originals have the following markings
I don’t know how these relate to the ratings of the regulators (MAY BE SOME ONE CAN ADD THAT) I had original replacements, but my local electronics shop had the same type, get the highest 5 volt rating to be safe. You need good to excellent skills for removing components and soldering, it’s very easy to damage the PCB tracks and ruin the main board that has the main CPU on it and this will destroy your 16.0.2. IF YOU DON’T HAVE THE SKILLS DON’T attempt this repair.
- Removed the 2 small screws on the underside of plastic side panels and push them to the rear, so they them come off.
- Remove 15 counter sunk Philips head screws per side and remove side panels
- Remove all 12 gain knobs , Remove the 4x 5/65 hex screws near the gain knobs
- Remove 5x countersunk Philips head screws on the underside at the front where the silver panel meets the grey panel
- Remove 5x mushroom Philips head screws at the rear top of mixer
- On the right side from front disconnect power to BNC light connector at rear, disconnect white power plug to top op panel PCB and ribbon cable.
- Carefully lift off top of 16.0.2
- The regulators are on the PCB with large CPU chip on it PN 410-SL16M-DSP , behind the power supply PCB. They are on the left hand side next to the white plug with 5x black cables and 1x red. Marking 45 500 F2 2N.
- Take note of all plugs, take a photo or mark them. They have locking tabs on the side so don’t pull to hard. Remove all plugs and unscew PCB there are about 6 -8 screws.
- Heat tab and legs on regulator and CAREFULLY remove with a fine pointed hobby knife
- CARFULLY replace / solder in new regulators, check for track damage, you will need a magnifying glass or something similar.
- Reverse process to assemble, power on a test before you put side panels on, in case you have a fault or missed plug. GOOD LUCK