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stratos92
Joined: 11 Jan 2018 Posts: 6
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Posted: Sun Feb 18, 2018 9:09 pm Post subject: equivalent transistor for 3330 |
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hi to all,
did you know what can be the equivalent of 3330, like in picture?
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jts1957
Joined: 24 Nov 2008 Posts: 2476 Location: Far, Far Away
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jts1957
Joined: 24 Nov 2008 Posts: 2476 Location: Far, Far Away
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grayson
Joined: 04 Jun 2021 Posts: 1
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Posted: Fri Jun 04, 2021 7:13 am Post subject: |
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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!
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