seagull 4b repairing record

patient: seagull 4b


symptom: eye (shutter) doesn't close after launched


possible treatment: WD40 to the shutter's gears

operation starts
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take off the handle bar


take off the back cover


peel off the skin, here's the hidden screws for the side covers


1 more screw inside


got it opened


take off the film advancer


open the side cover


need a special screw driver for this kind of screw. but I use 2 separate ones and apply force at the same time to do the job


that's how it looks inside


take everything unscrewed, beware of the spring bouncing out


after take off this metal bar on both sides...


... then the lens module can be taken off


there's no screw inside


so it should be somewhere under the skin


unscrew


also unscrew this ring


the naked lens module


take off the malfunctioning lens set


take the lens off by twisting it.
then twist the copper ring to expose the gears


mask the lens/shutter with tapes, and apply WD40 to the gears


start to put things back


further unscrew the lens then you can separate it, clean it up by the way ~


put the lens on, see, it works


also clean the upper lens


clean and clear


open the viewer and clean the mirror and glasses too


take the whole part off


blow and brush inside with appropriate tools


use tapes to stick the hardened dust plague off the edges


everything's back, done ! (except the skin is awaiting to be stuck back on)