repaired cdi boxes
Stig Arne Bye
mike wrote:
>
> Does anyone know if cdi boxes can be repaired and who does it.
CDI units can be repaired, ands with my almost 20 years experience in
both repair and construction of electronics, I have repaired several of
them so far.
As I've experienced when the CDI unit is bad, it is the SCR that has
blown in most cases. This is the component that control the ignition
coil directly.
Some reasons that can cause the SRC to blow is a short circuit in the
ignition coil or if one by an accident disconnect the ignition coil
without disconnecting supply power first.
If one have a little basic knowledge about electronics, and know how to
measure the components, it is no problem to make the repair.
The worst problem with the job is however to remove the sealing material
that the box is filled with without damaging the components inside the
unit.
Once that is done, the rest of the job is just a "piece of cake" as most
CDI units contain only one SCR (two SCR's when the CDI is controlling to
separate ignition coils) plus a few capacitors, diodes and resistors,
all of them standard components available at most electronic repair
shops.
After repair, one must refill the box with a sealing material similar to
the one used as the sealing material not only should make the unit water
tight, but also lock the components in place to avoid malfunction caused
by shock or vibration.
BTW, I've always wondered what make the price of a CDI unit when you
have to go to the dealer and buy a new one when it's malfunctioning.
As an example: If I have to go to my dealer and get a new one for my
sled, it would cost me about NOK 1,400 or equal to about US$ 185!
If fact, the cost for the components inside the CDI unit is only a
fraction of that price.
In one case, I checked all components found inside a CDI unit against
the price list from one of my electronic suppliers and found that the
total cost for all components was about NOK 100 (about US$ 13), or equal
to about 7% of the price for a complete new CDI unit!!!
That also reminds me of a story I read in a newspaper some time ago
about a guy with a malfunctioning ignition control unit on his
motorcycle.
He was told by both the dealer and the main distributor that he had to
buy a complete new unit because it coudn't be repaired and it would cost
him about NOK 22,000 (about US$ 2,900)!
He took the bad and obviously non-repairable unit to a ordinary TV
repair shop and asked if they could do something. They changed a single
defective diode in the unit for a total repair cost of about NOK 200
(about US$ 26) - a fraction of the cost for a complete new unit!
Stig Arne Bye
92 Yamaha VT 480 TF/E (Venture)
************************************************************************
E-MAIL ADDRESSES ICQ UIN | SNAIL-MAIL PHONE
--------------------- ------- | --------------- --------------------
VT480....@usa.net 403349 | P.O.Box 169 Home: +47 789-92432
sti...@usa.net (none) | N-9901 Kirkenes Fax: +47 904-13301
sti...@sn.no 403705 | Norway Cell.: +47 905-02790
------------------------------------------------------------------------
Homepage ......: http://home.sol.no/stigbye/index.htm
Snowmobile page: http://home.sol.no/stigbye/snowmobile/index.htm
************************************************************************
mike
Byron Sheppard
"mike" <hemm...@tir.com> wrote:
>Does anyone know if cdi boxes can be repaired and who does it.
Yes they can be repaired. The hardest part of the job is digging the
parts out of that silly potting compound they use.
I've fixed one on my sled that had faulty internal connections. I've
fixed one other that had faulty diode and another with faulty SCR.
The parts are cheap compared to the price of a new one.
I just use silicon seal to seal it all up again which seems to work
fine.
I don't know any place that specializes in fixing them though.
Byron Sheppard
Vancouver BC.
95 EXT Powder Special
93 Panther
Gary Hodge
I know that this is somewhat dated but this company repairs cdi
boxes. Rapair Inc 111 Commerce circle Madison Alabama 35785 phone #205
772 3829 hope this helps
waa...@redhetnoorden.nl
aha...@gmail.com
> Does anyone know if cdi boxes can be repaired and who does it.