Zenzanon 75mm PE Repair

[BoardsofCanada]

Hi everyone,

I have a problem with a 75mm PE. With or without the battery, it has erratic speeds, including often just hanging open or not firing at all. Bulb is the only reliable setting. While I couldn't find a repair guide online, I took a crack at disassembling the lens, but couldn't get into the shutter housing. I was able to confirm continuity on the ribbon cable and that's about it.

I'm guessing it's just a matter of cleaning the magnet. I have a second lens in worse physical shape but otherwise functional (apart from the DOF lever) parts are needed. I'm new to MF lens repair, so I don't know how feasible Frankensteining these into one working lens would be. Any advice is appreciated.

 

[koraks]

Welcome aboard! I do agree it sounds like an intermittent fault involving the solenoid. Regarding the erratic speeds, does the lens do speeds that are shorter than the set exposure, or both shorter and longer? I.e. assuming it's a solenoid failure, does it release too early, or does it (also) stick?