ultrafire C9 P7 dimming and turning blue??

abarth_1200

Flashlight Enthusiast
Joined
Jun 16, 2008
Messages
1,015
Location
Scotland
Hi everyone, got one of these in the mail the other day and when I opened the package it had smudges inside the lens, I tried the light first and it worked fine. When I screwed the reflector/lens assembly back together the reflector spun and twisted the led and pulled the -'ve anode off the emitter, so today I resoldered it back together making sure its not touching any of the heatsink and reflector, put it all back together and switched on fine it worked again.

But it heated up very fast then looked dimmer, then within a few seconds it got really dim and turned an ugly blue, almost like a keychain coin cell light.

Is this due to overheating, I reapplied thermal paste behind the emitter.
 
You shorted something out and the led goes :poof:. Atleast is was not a expensive light. Maybe you can reflow a new emmitter in and get it back running.
 
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