KTU Rework tutorial - Nokia RM-781 Modell 300

The following tutorial shows how to dismantle a Nokia RM-781 (Model 300) in order to work on ICs or on the built in RAM (samsung K9... chip):

 

 Nokia RM-781 - backlid removed

 

1. Now remove all screws:

Nokia RM-781 - remove all screws

 

2. press inner cover upwards

Nokia RM-781 - press inner cover upwards

 

3. Use tweezers to push upwards other side of inner cover

Nokia RM-781 - use tweezers to push upwards other side of inner cover

 

4. now you see the pcb

Nokia RM-781 - now you see the pcb

 

5. Now push outer frame outwards to release pcb

 

Nokia RM-781 - now push outer frame outwards to release pcb

 

6. lift pcb with display

Nokia RM-781 - lift pcb with display

 

7. separate pcb from display

Nokia RM-781 -separate pcb from display

 

8. remove the lid of the display socket with fingers

Nokia RM-781 - remove the lid of the display socket with fingers

 

9. display disconnected from pcb

Nokia RM-781 - display disconnected from pcb

 

10. mount pcb onto holders of Turbo IR

Nokia RM-781 - mount pcb onto holders of Turbo IR

 

11. adjust thermo sensor of Turbo IR to monitor heat on chip

Nokia RM-781 - adjust thermo sensor of Turbo IR to monitor heat on chip

 

12. turn IR source of Turbo IR to point at chip

Nokia RM-781 - turn IR source of Turbo IR to point at chip

 

13. turn on Turbo IR to get laser pointer

Nokia RM-781 - turn on Turbo IR to get laser pointer

 

14. adjust Turbo IR laser pointer and start the rework procedure

Nokia RM-781 - adjust Turbo IR laser pointer and start the rework procedure