Sennheiser G3 Screen Replacement

[astrojgmoore]

Hey guys!

I've been asked to replace the screen on a Sennheiser G3 EW100 handheld microphone by church. I've got so far as to removing screws, have a spare screen etc, but for the life of me I can't figure out how the casing comes off! It seams as though half of the boards are connected to the the inside and half to the outer casing! Any ideas? I will post a couple of pictures when I can!

 

 

 

Josh

[pete10uk]

From memory of a g2 fix I did, I think you have to start at the capsule end and undo 2 hex screws which allows the tx to pass back through the mic body casing.

[KevinE]

I've replaced lots of screens on these as they're the first thing to crack on impact! However, recalling the procedure is a brain-wracking thing for me without one in my hands whenupon it becomes second nature. But here goes..see what you think and apologies if I've forgotton anything...but it will be obvious.

 

Unscrew the battery compartment, pull it down. Undo the two tiny torx screws at the base of the aerial, push in the jog wheel and at the same time ease off the aerial cover, guiding it over the jog wheel. It is easy to strain this if too much force is used, it should slip over once you've got the technique. The screws are loctited and it is essential to use the right tool otherwise they'll chew up. If they're stuck fast, the brass bushes they're screwed into can start to rotate, so dont use too much force in that case, try working them progressively until they turn. The aerial carrier has a self-adhesive foam shock absorber wrapped around it, this sometimes gets stuck inside the aerial cover and will make it difficult when replacing..it belongs glued over the end of the aerial carrier. As you put the aerial cover aside, note that the red rubber on-off button is pushed inside and can easily fall out. Undo the shiny screws around the periphery of the cover, the cover should easily pull away downwards to expose the LCD screen and circuit boards. The screen can then be unclipped on its plastic carrier and the FPC connector released to let the ribbon drop out. It's folded around tightly and needs gently teasing out. Bear in mind when holding it in this state that the boards are very delicate indeed, possibly susceptible to static discharge, and that if you drop it, it's goodnight vienna.

 

Assembly is the reverse of all that!

While its apart, check the aerial is properly soldered to the circuit board; it's just a piece of wire and can fracture at various points or go dry-jointed leading to poor RF performance when reassembled. Check the jog wheel is working ok and hasn't been caught as you took the thing apart.