EVDL Administrator wrote (for Steve):
An article that Rod [actually it was Lee's article with Rod's photo] did on
the DLS 55 Iota converter....I am looking for the values of the 4 resistors
on the board just under the fan in the picture that he posted online...with
the values of the resistors I think I can repair my unit.
Photo of the roasted components:
http://imagebin.org/277158
Lee's article:
http://www.evdl.org/pages/iotamods.html
I'm not sure how much help I can be. The DLS-55 I have has a different
PC board than the one in your photo. If I assume that the circuit and
component designators are the same, then:
R2 = 100 ohms surface mount
R3 = 1k 5% 1/2w
R4 = 820 ohms 5% 1/2w
R18 = 10 ohms 5% 1/2w
R23 = 100 ohms surface mount
These resistors are in the gate driver circuit for Q2. If Q2 failed with
a gate-to-drain short, it is likely that these resistors would fail,
too. It may also have taken out the controller chip (U2 UC3844) and/or
gate driver transistors (Q3 and Q4).
--
The storage battery is one of those peculiar things which appeals to
the imagination, and no more perfect thing could be desired by stock
swindlers. Just as soon as a man gets working on the secondary battery,
it brings out his latent capacity for lying. -- Thomas A. Edison
--
See my Xmas project at www.sunrise-ev.com/projects.htm#christmastree
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