THE PROBLEM... The solder joints that connect BGA and CSP devices to the contacts on the PCB are made when arrays of dozens, or even hundreds, of tiny spheres of solder attached to the bottom of the device are melted during the reflow soldering process. Because these connections are located underneath the components, visual inspection is nearly impossible.
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When we subjected several motherboards (from Xbox 360 consoles that suffered the "Red Ring of Death" failure) to microscopic X-ray inspection, it was determined that a substantial number of the solder joints beneath the BGA and CSP devices appeared to be of questionable quality. This was especially noticeable towards the centers of the main CPU and GPU (Graphics Processing Unit).
THE SOLUTION...
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This repair procedure will work on the following treadmill belt problems...
1) frayed or cut belts due to belt pulling to one side;
2) belt slipping due to under-cloth damage;
3) belt damaged by overstretching.
It is recommended when the value of the walking belt exceeds treadmillvalue. For example, a new walking belt may exceed $180.00 on a 132" X14" belt. If this amount exceeds the value of your treadmill, consider a cheap repair method. You'll need the following items to make repairs: 2 rolls duct tape, cloth cutting scissors, spray adhesive (SuperTak is the best), and one-layer blanket insert (less than $5 at Wal-Mart).
1) Measure the belt. You'll need a tape measure or measuring device.
a) Get a pencil and place two marks the full length of the belt andmeasure it. b) Rotate the belt by turning the treadmill on and off quickly to get another full-length measurement. c)Repeat the steps until you have the exact measurements.
2) Remove the treadmill belt using the procedures outlined in the video below...
3) Clean the outer portion of the belt with a mild soap and water solution and let dry.
4) If the cloth ply on the underside of the belt is loose, take a few minutes and remove the entire layer. It may be a difficult at first, but once the layer begins to separate - the entire layer will easily come loose.
5) Use the duct tape to completely reline the bottom layer. This can take an entire roll of tape. Your underside should be completely lined with duct tape.
6) Reinstall the belt on the treadmill and adjust walking tension. The purpose of this step is to seat the duct tape adhesive. Walk on the treadmill lightly for about 1 minute (if it start to slip, this is ok).
7) Now, here's the hard part... Remove the treadmill belt again in order to add or install the cloth blanket liner.
8) With the belt remove, go ahead and cut your cloth blanket liner to the specified length and width of your treadmill belt. The cuttings can be done in sectional pieces. Notice, most blankets have a soft and acourse side. We will be gluing the course side to the duct tape.
9) Prepare your work area by covering the ground with a cloth or tarp. This prevents the sticky adhesive from damaging your workspace. A concrete floor is the best workspace. Now spray the adhesive to thesection of the belt to receive the first cut lining section. Let adhesive stand for about 1 minute and then apply the lining. Repeat these steps until the belt is completely repaired. Please note that the seams must butt together perfectly. Let the lining completely bond in about one (1) hour.
10) Reinstall the belt and tighten to specification. If the belt has tears to the edges, place a strip of duct tape along the top edges of the treadmill belt after the assembly is completed. This can be accomplished by turning on the treadmill and spooling the tape along the edges as it is rotated with the on and off switch.
Repeat the steps on both edges of the belt. You're done!
