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RM-840, RM-841, RM-839 Version 1.0 1) For disassembling you need the Nokia Standard toolkit version 2. You will also need the camera removal tool SS-276. Note that the device used in this disassembly procedure is the single SIM variant, RM-840/RM-841. All the disassembly steps are the same for both single and dual SIM variants.
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3) Release the BATTERY COVER by lifting up from the release notch. 4) Remove the BATTERY COVER.
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5) Unscrew the four Torx+ size 4 screws in the order shown. Do not use them again. Discard them. 6) To remove the D-COVER, first release the shown clip on the bottom side with the SRT-6.
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7) Then release the clips from the left side, starting from the bottom. 8) Then release the clips from the right side, starting from the bottom.
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9) Release also the two clips from the top. 10) Lift up and remove the D-COVER including the ENGINE BOARD and UI SHIELDING.
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11) Protect the other side of the A-COVER with protective film. 12) Push out the KEYMAT from the A-COVER.
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13) Protect the DISPLAY with protective film. 14) Unscrew the two Torx+ size 4 screws in the order shown. Do not use them again. Discard them.
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15) Separate the ENGINE BOARD and the UI SHIELDING from the D-COVER by first releasing the bottom corners with the SRT-6. 16) Lift up to remove the ENGINE BOARD including the UI SHIELDING from the D-COVER.
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17) Open the DISPLAY connector with the SS-93. Be careful not to damage the connector or any components nearby. 18) Open the UI FLEX connector with the SS-93. Be careful not to damage the connector or any components nearby.
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19) Use the SS-93 to release the two clips holding the UI SHIELDING on the ENGINE BOARD. 20) Separate the UI SHIELDING including the DISPLAY from the ENGINE BOARD.
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21) Use the dental tool to carefully release the DISPLAY from the UI SHIELDING. Be careful not to injure yourself with the sharp end of the dental tool. Release the DISPLAY little by little to avoid breaking it. 22) Remove the DISPLAY.
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23) Peel off the UI FLEX with tweezers. Do not use it again. Discard it. 24) Release the EARPIECE with the SS-93 and remove it with tweezers. Do not use the EARPIECE again. Discard it.
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25) Peel off and discard any EARPIECE ADHESIVE remains from the UI SHIELDING. 26) Insert the camera removal tool SS-276 to the CAMERA socket and press and hold down the button on top of the SS-276.
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27) Pull up to remove the CAMERA. 28) Release the IHF SPEAKER with the dental tool and remove it with tweezers. Do not use it again. Discard it.
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29) Release the SPEAKER GASKET with the dental tool and remove it with tweezers. Do not use it again. Discard it. 30) Push down to remove the ANTENNA MODULE from the D-COVER.
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Service Manual Level 1 and 2 Assembly hints Nokia 301, 301 Dual SIM RM-840, RM-841, RM-839 Version 1.0 1) When assembling the UI FLEX, first remove the adhesive foil and place the UI FLEX on the UI SHIELDING. Use the shown guiding holes to get the right alignment.
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