Question about Canon PowerShot A540 Digital Camera

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A540 - how do i take it apart?

I have taken all of the screws out of the case, however it wont fold open with the function selector dial in place. (the dial that switches it from camera to video camera, etc.) How do I get it off? I have tried prying, but am afraid that it will break. Anyone ever taken one apart?

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  • agould Jan 16, 2008

    Yes, I got all the screws. When unfolding the case (it comes apart like a book, with the top being the binding), it seemed as though the case would break if I tried to get it around the dial. If someone has actually taken it apart and managed to unfold the case with the dial in place and it hasn't broken, please confirm that. Thanks!

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Dial does not need to come off. The case halves will come apart with a little work. Did you get the screw in the battery compartment?

Posted on Jan 16, 2008

  • moonhole Jan 16, 2008

    The dial does not need to come off. Did you get the screw in the battery compartment?

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MY DISTRABUTION DIAL FOR DEF.,VENT, ETC IS IN DEFROST AND WON'T CHANGE. THE DIAL TURNS BUT NOTHING CHANGES. I NEEN SOME ADVICE ON WHAT TO DO TO FIND PROBLEM AND FIX. THANKS GENO


Here is the info. I hope the pictures show up. please rate assistance. thx.

Air distribution within the vehicle is determined by the function selector switch position. Two airflow mode doors are used to direct airflow within the heater core and evaporator core housing. The function selector switch/cable assembly is used to position these airflow mode doors. Refer to Section 412-00 for description and operation of each of the system functions.
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Function Selector Cable Assembly
The function selector cable assembly moves the airflow mode doors to the desired position using a 2-sided pull-pull type cable assembly. The function selector controls the cable movement. The end of the cable assembly attaches to the airflow mode door/temperature blend door actuating assembly which transfers the cable movement to the 2 airflow mode doors.
An electrical switch is incorporated into the function selector to notify the A/C switch assembly if DEFROST or FLOOR/DEFROST is selected. When DEFROST or FLOOR/DEFROST is selected, the A/C switch assembly will disable the RECIRC request button and send an A/C request to the powertrain control module (PCM) regardless of the A/C request button indicator ON/OFF status.
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SECTION 412-01: Climate Control 2005 Focus Workshop Manual REMOVAL AND INSTALLATION Procedure revision date: 02/25/2004
Function Selector Switch adobe.gif Printable View (173 KB) Removal and Installation
  1. Remove the 4 bolts and position aside the lower steering column cover.
    a0093241.jpg
  1. Remove the function selector knob.
  1. Remove the center instrument panel finish panel.
    • Disconnect the cigar lighter electrical connector.
    a0093247.jpg
  1. Detach the function selector switch.
    1. Disconnect the electrical connector.
    1. Remove the screw and detach the function selector switch.
    n0037059.jpg
  1. Detach the function selector cable and remove the function selector switch/cable assembly.
    e0000109.jpg
  1. To install, reverse the removal procedure.

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1 Answer

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I had this problem. The jog dial just stopped functioning. I repaired it by doing this:

1. Remove the batteries and leave the battery cover off.

2. Remove the case screws from the radio using a jewelers sized Phillips screw driver. There is one screw inside the battery compartment.

3. Gently separate the two halves of the radio just a few inches. Remove the wrist strap; it will just be laying over top of a screw post.

4. Inspect the wring of the jog dial. You will note several wires soldered to the dial, including one small bundle of wires leading from the jog dial to a white plastic connector on the faceplate of the radio.

5. Study the bundle of wires from the jog dial to the faceplate. Is it twisted? Has it been crimped inside the case? Smooth and straighten the wires with your fingers gently. Remove severe bends.

6. Detach the small white plastic connector from the faceplate and untwist and smooth the wires. The connector should slip off easily. Now clean the metal pins that the connector mates to with a Q-Tip. Seat, remove and re-seat the connector 3 times to scrape off any built up corrosion. Ensure the wire bundle is smooth and untwisted and reattach the connector.

7. With the radio still apart, reinstall good batteries. DO NOT USE AC POWER! and check that you have returned the proper function of the jog dial.

8. Reinstall the wrist strap over the top corner post and carefully mate the two halves of the radio together. Continue to test and check the jog dial as you seat the halves together. Reinstall one or two case screws at a time, checking that the dial still functions until the radio is fully reassembled and the case is tight.

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I suggest that as you remove the screws from the bottom of the case you take a note where the came from as some of the screws are different lengths.
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Next the keyboard should removed and keyboard cable.
Look closely for screws hidden behind plastic stick on covers, you need to use a sharp thin blade to lift off these covers to reveal the screws behind the covers.
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The motherboard needs to be removed from the bottom half of the case so you can access the power connector.
Take careful note where you remove each screw as you need to put them back in reverse order.

Best of luck, have fun.

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Mr.


There is no need to remove the bottom case.
There are screws on the back edge that fixes the LCD hinges to the base of the laptop.
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There may be further screws that fix the hinge to the base. Also there are cables that connect the LCD to th motherboard, be careful to remove the cables before you remove the LCD.

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Leave the mode selector wheel alone. It is not necessary to remove it. Take a look at the following A530 disassembly guide. It should be of help:

http://photography-on-the.net/forum/showthread.php?t=251630

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