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Sharp AR-M550 with a paper tray error F3-12

I am working on a sharp AR-M550 with a paper tray error F3-12. Tray 1(paper tray desk trouble). I took the cover off of the front of tray 1 so I could watch the elevator. The one on the right side works fine, but the left one does not move up. I switched out the drive motor and gears from the right side to the left. It did not help. I then switched the small board that has the two sensors on it and that did not help. I took the gearbox apart and watched the worm gear and it would not even try to turn when I blocked the sensors. The right side did turn.Someone please help. I have spent 3 hours on this one. Also, I can't remember how to enter simulation mode.

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1. Start and end of simulations Note: The "PAUSE" key in the descriptions means the "INTERRUPT" key. Simulation IN The Simulation IN mode becomes only available from the Copy mode screen. In the simulation mode, printer operation is inhibited. Printer operation is also inhibited in either of the Aging mode or the Adjustment Copy mode. The printer selection key is disabled, too. By operating the keys [C] – [PAUSE] – 0/g – [PAUSE], the simulation main code input screen appears. * If the interval between any two key operations is more than 5 seconds, the entry into the simulation mode is canceled. (Ref.) 1 ~ 9: Loading/ sensor checks 10 ~ 19: Resetting troubles 20 ~ 29: Counter/mode setting 30 ~ 39: Sensor activation checks 40 ~ 59: Adjustments 60 ~ 69: Digital readout and printer Simulation OUT The simulation can be terminated by pressing the [CA] key. 2. Simulation main code input screen SIMULATION NO. _ INPUT MAIN NO. AND PRESS PRINT SWITCH 1 If any trouble has occurred when the trouble code is requested, the 7-segment readout displays the trouble code (main only). [Note] The trouble code is canceled when the copier enters the simulation IN mode. [Note] The 7-segment readout becomes blank when the copier enters the simulation IN mode. 2 Only the [PRINT] key LED comes on. [Note] The [PRINT] key LED is usually OFF. It comes on when the copier waits for the [PRINT] key to be turned ON in the simulation mode. 3 The main code input area (2 digits) waits for the input of a main code. [Numeric Key]: Main code input [Note] Codes are entered in the ring format. [PRINT]: Sets entered data. [C]: Clears entered data. [CA]: Terminates simulation. [Others]: Cancels (ignores) entered data. 4 If a simulation has a sub code, it should be executed on the sub code input screen; a simulation does not have a sub code, it should be executed on the simulation execution screen. 3. Simulation sub code input screen

Posted on Jan 14, 2010

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