Can you identify this Surface Mount Transistor?
09-24-2002, 05:22 PM
#1
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Join Date: Sep 2002
Posts: 80
Can you identify this Surface Mount Transistor?
As many of you have experienced, it is possible to damage your LCU (Drivers side windows switch) by shorting the two terminals in the door light. Everything in the switch still works except for the door light and the dome light when the door is opened. When the door is opened the lcu supplies a negative line to the door light enabling it to come on. By comparing the passenger side lcu and the driver side lcu it appears(it tests bad with a meter) that the part that is bad is the transistor labeled (T4 and on the transistor itself Z 3) I have read all the posts concerning this topic and the only solution to date that I have found is to replace the LCU, which can cost from $20 to $200 depending on where you get it from. Personally, being mechanically inclined I would rather spend $1 and have the satisfaction of knowing what goes wrong in my car. So if you can identify this part, please do and I will let you know if it repairs the circuit. I know there are several people here that just live with the broken lcu and would like an easy fix. Thanks, 97' SEan
10-04-2002, 09:50 PM
#3
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Join Date: May 2002
Posts: 410
Where there other designators inbetween the 'Z' and the '3'?
It looks as if there were, but they got burned off whent he part got toasted.
The "Z3" designator is used for fairchild zener diodes in a SOT 23 package. The thing is that package is not a SOT23, which has 2 pins on ones side and one pin on the other side.
That package would more than likely be a FET or SCR.
It looks as if there were, but they got burned off whent he part got toasted.
The "Z3" designator is used for fairchild zener diodes in a SOT 23 package. The thing is that package is not a SOT23, which has 2 pins on ones side and one pin on the other side.
That package would more than likely be a FET or SCR.
10-04-2002, 09:55 PM
#4
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Join Date: Sep 2002
Posts: 80
Originally posted by soopermax02
Where there other designators inbetween the 'Z' and the '3'?
It looks as if there were, but they got burned off whent he part got toasted.
The "Z3" designator is used for fairchild zener diodes in a SOT 23 package. The thing is that package is not a SOT23, which has 2 pins on ones side and one pin on the other side.
That package would more than likely be a FET or SCR.
Where there other designators inbetween the 'Z' and the '3'?
It looks as if there were, but they got burned off whent he part got toasted.
The "Z3" designator is used for fairchild zener diodes in a SOT 23 package. The thing is that package is not a SOT23, which has 2 pins on ones side and one pin on the other side.
That package would more than likely be a FET or SCR.
Thx for the reply. I took apart the passenger side door and it's transistor is marked the same. I'll check into FET & SCR suppliers and possibly send them the pic for identification. Don't suppose anyone has a schematic?
Sean
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