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help

can somebody help me?
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service manual for  Hameg HM5530
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Author Topic: Hameg HM5530 Front end died  (Read 557 times)

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Offline istvanTopic starter

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  • Country: ro
Hameg HM5530 Front end died
« on: February 25, 2023, 08:23:38 am »
Hello everyone,  I bought a defective spectrum analyzer, can someone help me with a service manual for this model or something similar or close. I can't find any documentation and I don't know where to start. At first glance, I saw that a relay on the attenuation side was missing. I skipped, injecting signal on low pass filter, about 50mV sine 60 Mhz, but nothing happens. I replaced 2 BFP420 type transistors but the same. I don't know the steps I have to follow. I am attaching some photos below. thank you
 


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