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Video Teardown, Analysis and Repair of an Agilent E4407B ESA-E Spectrum Analyzer

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mhuffman77:
Bump on this topic. Any chance you could scan and upload the Schematic you are using. Schematic #E4403-60057? Great video, thank you very much for recording and sharing this. I watched it from end to end yesterday trying to repair an E4403B with an LO unlock failure. Unfortunately I received erroneous readings at the pretune circuit so we I had to part ways there in terms of failure. Pretty much dead in the water without that schematic.

smgvbest:

--- Quote from: mhuffman77 on January 07, 2016, 08:16:42 pm ---Bump on this topic. Any chance you could scan and upload the Schematic you are using. Schematic #E4403-60057? Great video, thank you very much for recording and sharing this. I watched it from end to end yesterday trying to repair an E4403B with an LO unlock failure. Unfortunately I received erroneous readings at the pretune circuit so we I had to part ways there in terms of failure. Pretty much dead in the water without that schematic.

--- End quote ---

Don't know if you're still needing the E4403 schematic but ebay has scanned copy
eBay auction: #https://www.ebay.com/itm/HP-E4401B-Component-Level-Info-Package-Schematics/390129973036?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649

or order direct
http://artekmanuals.com/manuals/hp-manuals/

mbielman:
Our E4407B at work developed an "LO Unlocked" error and decided to take a look. I have repaired two ESA's with this problem, same IC as in Signal Path repair videos. But when I started looking at the RF Deck PCB, it's different! Labeled as p/n E4403-20100. The divider chain has different parts. Uses an Agilent 1GC1-4210 divider (similar to HMC862) divide by 2/4/8/16 I believe, selectable via 3 inputs. It's driven by a differential receiver/driver MC10EL16.

CANNOT find a CLIP for this one!

But the MC10EL16 has 0 dBm coming in, and -15 dBm coming out.
Looks suspicious!

Mark

mbielman:
Correction: I think E4403-20100 might be the blank PCB.
The label on the PCA is E4403-60107. But NOT in the CLIP.

Mark

DavidAlfa:
Does anyone where to find the schematics shown in the video?
Can't understand why he didn't mention the transistor reference anywhere in the video? (”Thanks Twitter" isn't).
Thankfully I found the thread pointing to a EXCELICS EPA025A-70 part.

https://twitter.com/m0wut/status/1561824996204371970?cxt=HHwWhICzweTj26wrAAAA

https://twitter.com/m0wut/status/1554191138965393409

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