equivalent transistor for 3330

stratos92 · Joined: 11 Jan 2018 Posts: 6

hi to all,
did you know what can be the equivalent of 3330, like in picture?

jts1957 · Joined: 24 Nov 2008 Posts: 2476 Location: Far, Far Away

http://www.donberg.co.uk/descript/2/2sc_3330.htm
https://www.ebay.ca/itm/2SC3330-C3330-Sanyo-Transistor-Lot-of-2-pieces-/200795691322
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jts1957 · Joined: 24 Nov 2008 Posts: 2476 Location: Far, Far Away

http://nte01.nteinc.com/nte%5CNTExRefSemiProd.nsf/$$Search?CreateDocument&Query=c3330
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grayson · Joined: 04 Jun 2021 Posts: 1

Hello, I'm repairing a Keithley 3330 LCZ meter. I found that the output voltage is only 1/3 of the configured output voltage. It outputs 336mV when it should output 1V and it outputs 16.84mV when it should output 50mV. Both cases only about 33.6% of the configured voltage is output.

I have the service manual but there is no schematics so difficult to troubleshoot without taking the PCB out. There is a block diagram with an output buffer amplifier, which could be the culprit.

If anyone has the schematics I would greatly appreciate to get a copy!

Thanks.
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