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Unknown SOT23 - need help identifying

jasonb-1010

Aug 3, 2018
7
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Aug 3, 2018
Messages
7
Hi

I have a fault on a car part and expensive repair. the fault is the following part.

I have spend a long time trying to find this part T1s
please see attached picture

Please can anyone tell me a part number?

Jason
t1s.JPG
 

jasonb-1010

Aug 3, 2018
7
Joined
Aug 3, 2018
Messages
7
Thanks for your reply
I have just fitted BC17 (rs part number 807-5122) marking T1
This did not work.
In the past few weeks I have also tried
MMBT2369ALT1G Bipolar (BJT) Single Transistor, NPN (farnell part 1653624RL)
MMBT2369A Bipolar (BJT) Single Transistor, NPN (farnell part 9846719) marking 1S
BZX84B7v5 (rs part 800-9771) marking T15
BC807 -25LT3g (rs number 690 0079)

Thanks for your help do you have any other suggestions? I really need to get this part working.

Jason
 

kellys_eye

Jun 25, 2010
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Jun 25, 2010
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6,473
Have you got a wider view of the board where its mounted? Preferably with details of the tracks interconnecting to other components?

If it is a simple transistor then practically anything of the right polarity would work, including thru-hole parts soldered to the board pads - just to get the thing working.

Using parts other tha the exact replacement usually results in the pinout being different.......

Ther could also be another fault and/or the fault you have identified may be wrong - we don't know....
 

davenn

Moderator
Sep 5, 2009
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Sep 5, 2009
Messages
14,233
Thanks for your reply
I have just fitted BC17 (rs part number 807-5122) marking T1
This did not work.
In the past few weeks I have also tried
MMBT2369ALT1G Bipolar (BJT) Single Transistor, NPN (farnell part 1653624RL)
MMBT2369A Bipolar (BJT) Single Transistor, NPN (farnell part 9846719) marking 1S
BZX84B7v5 (rs part 800-9771) marking T15
BC807 -25LT3g (rs number 690 0079)

Thanks for your help do you have any other suggestions? I really need to get this part working.

Jason


well that suggests, as @kellys_eye said, that there may be other problems with the board … the part itself doesn't look like it has failed
 

Alec_t

Jul 7, 2015
3,580
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Messages
3,580
Those meter readings suggest that the device is internally shorted, if it's out of circuit; or else give no useful indication of device properties if it's in circuit in parallel with low impedances.
 

jasonb-1010

Aug 3, 2018
7
Joined
Aug 3, 2018
Messages
7
Hi guys, I had a suggestion from another member, R3130N44HA

I have been busy finding R3130N44HA and its not that easy! I have found ONE data sheet that says a T1 marking with "s" being place of manufacture. so i tried to find it.

There are 4 types of R3130N part, all very slightly different. but all do almost the same function.
The only part I could get my hands on was R3130N22EA and this sadly did not work. I have tried to purchasing from china, eBay allibarber the 44HA type with no joy. Fitting this the automotive part did not work, refitting the 2 original T1s sot's onto the unit work again.

Note Pin 1 is connected directly to 0V/Ground on the board

Any other help would be appreciated

Regards Jason
 

jasonb-1010

Aug 3, 2018
7
Joined
Aug 3, 2018
Messages
7
Ok

What do I know. Its a 5v board, pin 1 is to 0v/gnd & Pin3 is NOT CONNECTED
Pin 2 goes direct to pin 77 if an infineon IC C164CI

Port 5 is an 8-bit input-only port with Schmitt-Trigger charact.
The pins of Port 5 also serve as analog input channels for the
A/D converter, or they serve as timer inputs

Any ideas?

Regards jason

http://www.rebuild.org.uk/site-images/pin77.JPG

pin77.JPG


D converter, or they serve as timer inputs  Any ideas
 

pubo

Feb 4, 2021
1
Joined
Feb 4, 2021
Messages
1
Ok

What do I know. Its a 5v board, pin 1 is to 0v/gnd & Pin3 is NOT CONNECTED
Pin 2 goes direct to pin 77 if an infineon IC C164CI

Port 5 is an 8-bit input-only port with Schmitt-Trigger charact.
The pins of Port 5 also serve as analog input channels for the
A/D converter, or they serve as timer inputs

Any ideas?

Regards jason

http://www.rebuild.org.uk/site-images/pin77.JPG

pin77.JPG


D converter, or they serve as timer inputs  Any ideas
Just wondering if you manged to find out what part this is?

Did you manage to fix your throttle actuator?
 
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