Dewalt dw9116 d23

Diodes do not have a resistance. They have a forward bias current and a reverse voltage limit. There should be a number on the device for a google x-reference.

D23 is a transient voltage suppressor. Code: 1.5KE51A

May read instructions and see if charger is compatible of charging the two types of batteries you are charging ,,,,I have 32 dewalt 18v dc9096 batteries and 1d dewalt 18v dc9099 battery

let dry completely . if any corrosion on pcb clean with contact cleaner from radio shack

Brown
Brown
Silver

Gold

R21 = 0.11 Ohm at 5 percent

Now can someone help me find the schematic for this model? DW9116
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On 3/5/12

It means there is too high or too low a voltage coming into the charger. Check your chord.

I had the exact same problem. After using the necessary security bit to crack mine open, I found that the large capacitor inside had come loose and needed to be re-soldered.

That fixed my charger.

Go to Dewaltservicenet.com and in the middle of the page at the bottom find the looking for manual box. Type in your model number and it will take you to a page click in the owners manual and download it from there it is 5 pages long. If I have helped you would you please rate my solution accordingly and thank you.

I'm disappointed that Dewalt does not have the full specs on their website so . . .
Check the specifications on the charger's label; they should read something like 120 VAC or Volts AC and 2.0 (or similar) amperes or just 'A' after a numerical value.
If the label does not give you an amperage value you can use the output value instead and substitute the output voltage at the high end if a range is listed.
To get the adaptor (step-down transformer) wattage, multiply the AC values such as:
120 X 2=240 watts input power.
If these AC values are not available;
Take the high end charge voltage if it is a multirange charger, and multiply those values;
One we own DW9108 (- yours is 7.2 - 18) is spec'd at 9.6 to 18 volts and 2.8 amperes:
2.8 X 18=50.4 watts.
You can see that the values do not correspond but it is a multirange device so the maximum current taken from the AC line can be ~ 2.0 amperes but this is charging a specific pack and the peak input current is only momentary so the maximum output current and voltage are the values one should use as a guide. In other words, the output wattage is closer to the value needed.
Since there are losses in any transformation (mostly heat), the required stepdown transformer must be capable of more than the indicated 50 watts.
A safe factor would be 1.5 X 50 (W) or ~ 75 watts minimum to ensure the charger receives the 120 volts it wants.      
Anything that will step down your (?) 220 volts and is rated at 75 watts or more will do the job even if the Dewalt draws a little more current at your line frequency of 50Hz which it may.

Online Manual (PDF) For DW9116
http://www.dewaltservicenet.com/documents/English/Instruction%20Manual/630429-00,DW9116.pdf

Dewalt DW9116 Product Recall:
http://www.dewalt.com/us/articles/article.asp?ID=187