Common Display & Power Supply Issues
The Behringer DDX3216 is a fully automated 32 input, 16 buss digtal mixing console, complete with motorized faders, and built-in digital effects processing. Like many of these units, the display contrast has failed, rendering the display screen unreadable. In addition to the failed display, this unit also has a power supply problem which causes the mixer to be completely unresponsive and unusable.
These are two very common and well documented problems with DDX3216 mixers. The display circuit develops this problem over time as the capacitors on the display board begin to fail. Rather than testing to find the failed capacitor(s), I will replace all 5 of them, rather than replacing one each time another cap fails.
DDX3216: Complete Failure Mode
When powered on the 3216 lights up like a Christmas Tree! FAILURE MODE
When powered up, most of the LED’s light up and the mixer is completely unresponsive. This is indicative of a power supply failure, also attributed to failed capacitors.
Disassembly
Disassembly was straightforward, removing some 30+ screws from the back, front, and sides of the mixer case. During disassembly caution must be taken when separating the top and bottom sections, as there are a number of short interconnect cables between the circuit boards mounted to the top and bottom sections. Pulling the two sections apart in haste would undoubtably damage the cable connectors. Once inside, I noticed all the cables were hot glued to their respective sockets! Luckily, over time, the glue became dried out enough that I was able to remove the glue fairly easily and without causing any damage.
Display Board Fix
There are FIVE surface mount capacitors to be replaced for repair of the display contrast issue.
Power Supply Troubles
Ready to uncover and investigate
