Re: Component ID?

Thanks for the reply, Eeyore.

Yes, a date code of week 23, 1994 sounds perfectly reasonable for a
1995 Chevy. I've posted some pictures of the diode, the PCB, and the
component that it was connected to. They're available at
http://www.thezac.com/wipers/ .

The broken diode was connecting a +12 VDC power source to pin 2 of the
blue component in the last picture. The +12 VDC power source passes
through a 25 amp fuse before coming into the device. The other pins of
the blue component are connected as follows:

Pin 1: One of three terminals on the wiper motor (not the ground
terminal)
Pin 2: The broken diode
Pin 3: Two transistors. I'd have to draw a whole schematic to describe
where these transistors lead.
Pin 4: The cathode terminal of a much smaller (physically) diode that
connects to the same +12 VDC source as the broken diode. This diode
can be seen in the pictures to the right of the label "MIN COATING".
Pin 5: Ground

Don't know if this information provides any insight, but I thought it
couldn't hurt.

Thanks,
Joe



On Mar 21, 1:22 am, Eeyore <rabbitsfriendsandrelati...@xxxxxxxxxxx>
wrote:
joe.hods...@xxxxxxxxx wrote:
Hi,

I'm trying to identify a manufacturer and specs for what I believe is
a diode. It's a black cylinder with a silver band surrounding one end,
and its position on the PCB is labeled with a diode symbol and the
identifier CR2 (where 2 is the device manufacturer's arbitrary numeric
id for that component on the PCB). It's about 8.5 mm in diameter and
about 9.5 mm in length.

That sounds pretty convincingly like a diode for sure.

The component has split in half and I would like to replace it in an
attempt to salvage the device, but the only identifying information on
the component is "LT 9423" on one line, and "22059733" on the next
line. I'm not exactly an electronics hobbyist, so I don't recognize
"LT" as a manufacturer or other sort of designation. Nothing jumped
out at me when I scanned the 100+ pages of diodes in the Digi-Key
catalog.

9423 is almost certainly a date code meaning week 23 of 1994. Does that
sound likely ? None of the other stuff helps.

Can anyone lead me in the right direction? Just FYI, the device is a
windshield wiper control unit for a Chevy pickup truck.

Can you post a picture somewhere, it's very likely to be fairly easily
identifiable from that. I'm suspecting a 6 amp rectifier diode type
myself.

Graham

.

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