John, these non-used pins are linked to the fact that the Z201-1 and Z201-2 are identical, and etc. for the other Zxxx. These are non-used pins when they are in position "1" but used when they are in position "2".
From the picture you sent, I see three "bumblebee coded" PIO caps in there. Did you plan to change those ?? All the ones I had were found leaky.... 73, Jacques, VE2JFE in Montreal -----Message d'origine----- De : [email protected] <[email protected]> De la part de jkharvie via R-390 Envoyé : 10 juillet 2024 13:46 À : R-390 Mailing List <[email protected]> Objet : [R-390] Guided discovery on the RF deck While in the RF-subschassis process of cleaning and reassembly I noted that only 2 of three pins are plugged in and active on Z201-1Z202-1Z203-1Z204-1Z205-1Z206-1 as per the electrical schematic, but something I never specifically noted or thought much about previously. This got me thinking that the non-used pins might serve as a source of spare pins if/when needed. Attached graphic shows top view of the RF subchassis awaiting cleaning, a three pin "can" of which two pins are used, a bottom view showing mounted cans with no connection to the one pin in highlighted red box, and the RF subschassis schematic showing all of this. One of the "tools" I made was drilling out the end of a bamboo chopstick with a #35 drill (0.110") to hold 1/2 of cotton tip applicator swab. Best regards, John (N3JKE) ______________________________________________________________ R-390 mailing list Home: http://mailman.qth.net/mailman/listinfo/r-390 Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
