Electronics > Repair

E4407B Tracking Generator Repair

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analogRF:
I think I was wrong about that black mystery component at the back of pcb. It has in fact 6 pins (see the pic)

still no idea what that is but the +/- pins are Vcc and GND.  But now it is beginning to look like a VCO. I think the control voltage is probably the
single pin on the top that connects to the big through hole resistor

Sandra, can you post a close up photo of the rectangular area that I designated on the picture

smgvbest:

--- Quote from: analogRF on September 26, 2020, 02:45:45 am ---I think I was wrong about that black mystery component at the back of pcb. It has in fact 6 pins (see the pic)

still no idea what that is but the +/- pins are Vcc and GND.  But now it is beginning to look like a VCO. I think the control voltage is probably the
single pin on the top that connects to the big through hole resistor

Sandra, can you post a close up photo of the rectangular area that I designated on the picture

--- End quote ---

I'm posting all the close-ups I did but those 2 components I think will need better photo's than these
i think the close-up of those 6 pins may be good if not let me know and tomorrow (its bed time) i'll open the BITG back up and get better photos

smgvbest:
More

analogRF:
the markings on those components are not visible

smgvbest:

--- Quote from: analogRF on September 26, 2020, 11:20:05 am ---the markings on those components are not visible

--- End quote ---

Didnt think they where.  i'll work on getting the BITG torn down again for pics and post soon as possible

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