kasakka Posted January 29, 2011 Report Share Posted January 29, 2011 So after running out of power due to being not used for a few days, I rewound and set the time on my Breitling Navitimer TT replica but to my dismay it no longer runs. The seconds dial hand moves as normal, but the minutes and hours don't move anywhere. It's got an Asian 7750 movement and I've had the watch for maybe 3-4 months now. How expensive will this be to fix? Quote Link to comment Share on other sites More sharing options...
maxman Posted January 29, 2011 Report Share Posted January 29, 2011 Try running the chronograph and see what happens,good luck. Quote Link to comment Share on other sites More sharing options...
Francisco Posted January 29, 2011 Report Share Posted January 29, 2011 Try running the chronograph and see what happens,good luck. probably there is a piece of dirty/metal stopping the cannon pinion... Quote Link to comment Share on other sites More sharing options...
kasakka Posted January 29, 2011 Author Report Share Posted January 29, 2011 (edited) Try running the chronograph and see what happens,good luck. The chronograph does run normally until it gets to around 11:57 on the dial (so not even a full revolution). Then it just gets stuck. Edited January 29, 2011 by kasakka Quote Link to comment Share on other sites More sharing options...
maxman Posted January 29, 2011 Report Share Posted January 29, 2011 The chronograph does run normally until it gets to around 11:57 on the dial (so not even a full revolution). Then it just gets stuck. I would let someone take a look at It,tell them what Francisco said. Quote Link to comment Share on other sites More sharing options...
RWG Technical Posted January 29, 2011 Report Share Posted January 29, 2011 Your cannon gear is slipping, it needs a complete servicing, and restoring of the cannon gear friction. Slipping cannon gears is a normal problem on all A7750's. Quick test to confirm: Wind the watch manually, very slowly 30 turns on the crown Set the time and as you move the crown note how much friction there is, does it feel loose (probably) or can you feel some friction, compare the friction to the quickdate set position feel Synchronize the seconds subdial to a known clock, push the crown it and monitor what happens Start and run the chrono at the same time, note if there is a difference between the main hour and minute hands and the elapsed time on the chrono Report back on the above and you will have your answer... Quote Link to comment Share on other sites More sharing options...
maxman Posted January 29, 2011 Report Share Posted January 29, 2011 Thank you Zigmeister for taking the time to help us out,much appreciated sir. Quote Link to comment Share on other sites More sharing options...
RWG Technical Posted January 29, 2011 Report Share Posted January 29, 2011 Thank you Zigmeister for taking the time to help us out,much appreciated sir. I only know the answer because it's a common problem. Feedback will confirm what is going on... You are very welcome, as always. Quote Link to comment Share on other sites More sharing options...
kasakka Posted January 29, 2011 Author Report Share Posted January 29, 2011 Your cannon gear is slipping, it needs a complete servicing, and restoring of the cannon gear friction. Slipping cannon gears is a normal problem on all A7750's. Quick test to confirm: Wind the watch manually, very slowly 30 turns on the crown Set the time and as you move the crown note how much friction there is, does it feel loose (probably) or can you feel some friction, compare the friction to the quickdate set position feel Synchronize the seconds subdial to a known clock, push the crown it and monitor what happens Start and run the chrono at the same time, note if there is a difference between the main hour and minute hands and the elapsed time on the chrono Report back on the above and you will have your answer... The quickdate feature doesn't work, it seems to spin freely and the date doesn't change. There is some friction when setting the time and the date changes if using the regular time setting. If using the chrono, it jams like I described earlier but in this case the seconds hand also jams. Disabling the chrono makes the seconds hand run again but the others refuse to move. Quote Link to comment Share on other sites More sharing options...
stiff muckler Posted January 29, 2011 Report Share Posted January 29, 2011 Your cannon gear is slipping, it needs a complete servicing, and restoring of the cannon gear friction. "restoring of the cannon gear friction" = tightening da cannon pinion stiff says dats pretty simple. From dis far away stiff can't tell if your uhren needs da full "COA" or not. Fur de Valjoux, stiff thinks dats worth about 300E. stiff muckler ist im Haus! "Have a happy day!" Quote Link to comment Share on other sites More sharing options...
RWG Technical Posted January 29, 2011 Report Share Posted January 29, 2011 The quickdate feature doesn't work, it seems to spin freely and the date doesn't change. Common problem as well, the quickset date change gear is not switching over, can be fixed during servicing. There is some friction when setting the time and the date changes if using the regular time setting. Ok, quickset and time setting for date change are two separate gears. If using the chrono, it jams like I described earlier but in this case the seconds hand also jams. Disabling the chrono makes the seconds hand run again but the others refuse to move. Could be a number of things causing the chrono problem. You need a servicing...and repair of these issues... Quote Link to comment Share on other sites More sharing options...
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