Comments on: Finding Transistor Specification https://jestineyong.com/finding-transistor-specification/ Semiconductors, Test Equipments, Circuit Board Troubleshooting, Electronic Repair Courses and Many More! Tue, 07 May 2013 08:21:16 +0000 hourly 1 https://wordpress.org/?v=5.4.19 By: Jestine Yong https://jestineyong.com/finding-transistor-specification/comment-page-1/#comment-192068 Tue, 07 May 2013 08:21:16 +0000 https://www.jestineyong.com/?p=2988#comment-192068 In reply to Shahidan.

Hi Shahidan,

Not sure if the letter "P' is denotes as plastic casing or insulated but what i know some manufacturers just remove the few front letters making tracing the original parts difficult.

Jestine

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]]> By: Shahidan https://jestineyong.com/finding-transistor-specification/comment-page-1/#comment-192061 Tue, 07 May 2013 08:08:59 +0000 https://www.jestineyong.com/?p=2988#comment-192061 It is quite common for manufacturers do not print out the first two alphabets of a transistor. hey assumed that the alphabets are redundant . Transistor C945 is 2sc945. The P in your examples denotes that they are in plastic casing. Those transistors with markings P....are normally recognized as STP...Tell me if I am wrong.

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]]> By: admin https://jestineyong.com/finding-transistor-specification/comment-page-1/#comment-6244 Tue, 27 Jul 2010 00:21:13 +0000 https://www.jestineyong.com/?p=2988#comment-6244 HI RUSS,

Sorry no info on this and i guess the best is to ask the staff from electronics shop on how to see the different especially the part number. Not long ago i opened the remote control and found 3 IR LED and the measurement was different from the normal LED.It does not have reading even using the analog meter.

Jestine

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]]> By: admin https://jestineyong.com/finding-transistor-specification/comment-page-1/#comment-6235 Sun, 25 Jul 2010 23:53:32 +0000 https://www.jestineyong.com/?p=2988#comment-6235 Hi Beh,

Thanks for sharing and i hope they don't mean it that way. The manufacturers can always remove the part number as what i have seen on a brand of UPS and there is no way, any repair tech could know what the part numbers were.

Jestine

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]]> By: beh https://jestineyong.com/finding-transistor-specification/comment-page-1/#comment-6233 Sun, 25 Jul 2010 15:44:18 +0000 https://www.jestineyong.com/?p=2988#comment-6233 the answer from manufactures:
yes
this purposely is done on all of our prouducts to stop all repairer
from thier jobs . and encourage the useres to buy always new sets not
to repair them.

TOSHIBA . PANASONIC. SONY.ALL CHINES BRANDS ..SO AND SO......................................................

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]]> By: Russ https://jestineyong.com/finding-transistor-specification/comment-page-1/#comment-6225 Sat, 24 Jul 2010 09:46:15 +0000 https://www.jestineyong.com/?p=2988#comment-6225 What about IR LED's? They have no letters or numbers or anything that helps you determine what the spec's are. I come across them in my service of redemption and other coin op games. I needed to replace four of them the other day and they wanted $55.00 for it. They wouldn't tell me what part number it was so I am going to try and buy a bunch of them off eBay and swap them in hoping that one will work. Any ideas or suggestions?

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