WFCO modification Images?
My ignorance. I copied the images off the linked web page and then tried to save them to Open Office. Mistake. How can I save images so I can retrieve them? Conversion to PDF comes to mind but PDF ...
Forum Discussion
Yes there are indeed several different WFCO series and models with each series many with vastly different circuits. To date have not heard of an 8200 series
This might be a possibility depending on your unit
8955 Later version serial #’s - Force into boost can be added by placing a resistor in parallel with R50 going to pin 7 on microcontroller 12F675. R49 and R50 divide down the 13.6V signal to something like 4.205V. By placing a resistor (somewhere around 62K) in parallel with R50 makes the micro controller think the output is 13.6 when it is really 14.4V
From what I have seen - most of the 8900 series had the remote control capability from the factory. The remote control functionality can be added to most of them with a few simple modifications
Check R2 and R3 large (3 to 5 watt) white 1.3K resisters - get them off the board and replace the nearby 220ufd@25Vdc cap - that cap gets too hot and is a MAJOR cause of failure - by the way this resister / cap setup is the exact same circuit as the Parallax 5155
This might be a possibility depending on your unit
8955 Later version serial #’s - Force into boost can be added by placing a resistor in parallel with R50 going to pin 7 on microcontroller 12F675. R49 and R50 divide down the 13.6V signal to something like 4.205V. By placing a resistor (somewhere around 62K) in parallel with R50 makes the micro controller think the output is 13.6 when it is really 14.4V
From what I have seen - most of the 8900 series had the remote control capability from the factory. The remote control functionality can be added to most of them with a few simple modifications
Check R2 and R3 large (3 to 5 watt) white 1.3K resisters - get them off the board and replace the nearby 220ufd@25Vdc cap - that cap gets too hot and is a MAJOR cause of failure - by the way this resister / cap setup is the exact same circuit as the Parallax 5155
