One of my favourite Casio G-Shock is the DW-6700. This watch was issued in 1994 and is known as the Skyforce. As can be seen from the picture below, this watch too has suffered from water ingression. After my experience with my DW-8030G, I decided to clean this watch as well. It was not as easy as the DW-8030G as this watch has a temperature sensor. So I have to be more careful. Here it is. Be warned that this is long.
Cleaned the work area and got all the tools out. The first step, strap removal.
Now to begin work on the watch. First lets remove the bezel. It is held by 4 screws at the 4 corners.
The bezel screws. Notice it is not threaded all the way to the head. This is to hold the bezel to the case.
The bezel. Inside view and outside.
The case. In the picture below, you can see the sensor. It is protected by a plate and is held by 2 screws.
Now to remove the case back. As usual, I tend to remove the case back screw with the case back pressed down and removing the screws in a cross formation, a few turns at a time. This is to prevent stress on the resin body if the case back were to 'pop' or warp.
The case back removed. We can see the rubber spacer. This is used to hold the module in place and also to provide additional shock proof capabilities.
The module 1230. I have no idea what the 'Do Not Turn' is for but I suspect it is some sort of temperature compensation adjustment. Anyone?
The case back. Again, I don't know the significance of the number '116'.
The next step is to remove the battery. This is to prevent any 'shocks' to the electrical circuit as I will need to remove the sensor from the module. Unlike other G-Shock that I have seen, the battery cover is actually screwed down. The battery is the standard CR2016.
Now to disconnect the sensor from the module. If the sensor is not disconnected, the module would not come out. I tried to remove the sensor from the case but could not, so this was the next logical step. The following photographs shows my attempt to remove the sensor from the case. The plate removed.
The sensor. We can see the o-ring around the sensor. We will see the o-ring later.
Now to remove the sensor. Before we do that, remove the 2 springs that are located near the sensor. We will see the springs in more detail during the assembly process. Unscrew the plate that holds the sensor circuit to the main circuit.
Pull the tab and slowly lift the PCB. It has 2 guide pins, top and bottom (grey colour pins).
The retainer plate for the sensor circuit.
The module removed. We can also see the retainer ring with its rubber sheath. This also provides the shock protection. The cut-outs at the 4 corners are for the buttons and the other cut-out is to locate the ring in the case. We will see this in more detail on assembly.
The sensor circuit tab in the case.
As usual, cleaning is by soft tooth brush and mild soap. Cleaning and drying using my Bergeon cloth and Rodico. Blow dry with a hair dryer set on low heat. We have to be careful not to damage the rubber dial. Careful to completely dry the sensor circuit.
Once dried, and cleaned, the assembly process can take place. The o-rings are lubricated. In the picture below, the smaller o-ring is the sensor o-ring.
The assembly process. Align the spacer ring to the case. Note the cut-out at the 6 o'clock position. Align it with the tab on the case.
Insert the module and align the sensor circuit to the main circuit. Note the grey alignment tabs. Screw down the circuit retainer. Remember the 2 springs? Well in the photograph below, we can see the 2 holes where the springs are suppose to go. I have no idea what are the functions of the springs.
The springs inserted.
The battery can now be inserted. We then check to make sure everything is working. Also check that the module is straight and align. Next the rubber spacer can be fitted.
Please note that the spacer is wrongly fitted. It should be as below. Thanks to our reader Raitis who spotted the mistake.
Install the case back. Press the case back against the case and screw the screws into the case. Again I cross the screw process to ensure the case back is fitted straight. This also prevents stress to the case. Once tighten, I then go around once more in a clockwise direction to give the screws a final tightening screw.
The straps are fitted and the final result?
A larger photograph.