@fastmatt I am trying to repair an old speak and spell (the pcb shows it being the first version made when released #1033303-3G). After cleaning the battery contacts, I noticed one of the four transistors in the lower left of the power board (# BP 4023) was smoking. I’m wondering if your above comment on equivalent transistors is applicable to my board. Of the four, there are three different part numbers on the transistors (one CS9012D, one CS9013D, and two QB2105CY which is the type that burned out). Any suggestions on equivalents is appreciated.
+
@fastmatt I am trying to repair an old speak and spell (the pcb shows it being the first version made when released #1033303-3G). After cleaning the battery contacts, I noticed one of the four transistors in the lower left of the power board (# BP 4023) was smoking. I’m wondering if your above comment [https://www.ifixit.com/Answers/View/50068/Burnt+after+wrong+voltage+AC+adapter |on here] on equivalent transistors is applicable to my board. Of the four, there are three different part numbers on the transistors (one CS9012D, one CS9013D, and two QB2105CY which is the type that burned out). Any suggestions on equivalents is appreciated.
=== Update (12/17/23) ===
-
@oldturkey03 Thanks for the response! In looking at the alltransistors website, it looks like I would use 2N3904 for the CS9013D, so I have two of the three, but like you I can’t find anything on the QB2105CY. Hopefully these three pictures come through.
@fastmatt I am trying to repair an old speak and spell (the pcb shows it being the first version made when released #1033303-3G). After cleaning the battery contacts, I noticed one of the four transistors in the lower left of the power board (# BP 4023) was smoking. I’m wondering if your above comment on equivalent transistors is applicable to my board. Of the four, there are three different part numbers on the transistors (one CS9012D, one CS9013D, and two QB2105CY which is the type that burned out). Any suggestions on equivalents is appreciated.
+
+
=== Update (12/17/23) ===
+
+
@oldturkey03 Thanks for the response! In looking at the alltransistors website, it looks like I would use 2N3904 for the CS9013D, so I have two of the three, but like you I can’t find anything on the QB2105CY. Hopefully these three pictures come through.
@fastmatt I am trying to repair an old speak and spell (the pcb shows it being the first version made when released #1033303-3G). After cleaning the battery contacts, I noticed one of the four transistors in the lower left of the power board (# BP 4023) was smoking. I’m wondering if your above comment on equivalent transistors is applicable to my board. Of the four, there are three different part numbers on the transistors (one CS9012D, one CS9013D, and two QB2105CY which is the type that burned out). Any suggestions on equivalents is appreciated.
@fastmatt I am trying to repair an old speak and spell (the pcb shows it being the first version made when released #1033303-3G). After cleaning the battery contacts, I noticed one of the four transistors in the lower left of the power board (# BP 4023) was smoking. I’m wondering if your above comment on equivalent transistors is applicable to my board. Of the four, there are three different part numbers on the transistors (one CS9012D, one CS9013D, and two QB2105CY which is the type that burned out). Any suggestions on equivalents is appreciated.