transistor help

Aug 22, 2006 3 Replies
I

Hello,



I have a home irrigation controller hat has gone faulty on one of the zones, I have opened it up and have found one of the transistors to be faulty there is a number on the transistor but it looks like its a part number from the manufacturer of the irrigation unit rather then the actual part number of the transistor.



The number written on it is 1401ES or 1401E5 cant make out if its a 5 or an S but looks like an S to me and sound like it might be an NPN transistor.



The purpose of this transiston from what I can tell from the board is to turn a solenoid on and off.



The Irrigation unit is made by Holman Distributors.



Any help you can provide would be greatly appreciated.



Thanks Imran Khan


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M

Sorry Mate but your comments re: ball tampering have not gone unnoticed.

Seriously though, what voltage is the solenoid? how is the transistor driven in the circuit?. Can you test an identical transistor in the unit to see if it is NPN? if it is then you should be able to substitute a common NPN in the circuit without any problems.

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G

Try Googling " 1401E5 " like I just did. Or contact (google again ?0 the manufacturer.

And tell your cricket team to stop cheating !

;-)

geoff

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Z

yes its NPN what voltage is the solenoid? and how big.

zones,

there

an

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