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HP 32SII success and woes
02-13-2015, 12:17 PM (This post was last modified: 02-13-2015 01:00 PM by Sanjeev Visvanatha.)
Post: #22
RE: HP 32SII success and woes
Regarding the 'metal plate' I was mentioning earlier. It seems that with the introduction of the 32SII in 1991, HP went to a PCB design with ground shield mesh on the back, eliminating the need for metal shielding on the back of the calculator case.

http://www.hpmuseum.org/guest/brogpion.htm

Quote:With the HP-32SII and newer low-end models, HP has greatly simplified the PCBs' layouts. The new PCBs have traces on only the front side, with a ground shield mesh on the back. (This has eliminated the need for metal shielding in the back of the calculator.)

So, I surmise that the metal plate I was referring to is the shielding on the inside of the case found pre-1991 on all models and post-1991 on everything but the 32SII and low end models.

This seems to be supported by Fig. 23 of Geoff's article, where the metal shielding covers the exact spot I was referring to in my previous posts:

http://h20331.www2.hp.com/hpsub/download...e_2010.pdf

(Click on Calculator Restorations when the PDF opens up)

-- Sanjeev Visvanatha
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Messages In This Thread
RE: HP 32SII success and woes - renif - 02-10-2015, 01:56 PM
RE: HP 32SII success and woes - rprosperi - 02-11-2015, 02:12 PM
RE: HP 32SII success and woes - rprosperi - 02-11-2015, 10:55 PM
RE: HP 32SII success and woes - rprosperi - 02-12-2015, 12:21 AM
RE: HP 32SII success and woes - Sanjeev Visvanatha - 02-13-2015 12:17 PM
RE: HP 32SII success and woes - rprosperi - 02-13-2015, 12:51 PM
RE: HP 32SII success and woes - rprosperi - 02-13-2015, 06:53 PM
RE: HP 32SII success and woes - rprosperi - 02-14-2015, 02:03 PM
RE: HP 32SII success and woes - jebem - 02-16-2015, 09:36 AM
RE: HP 32SII success and woes - jebem - 02-16-2015, 03:22 PM
RE: HP 32SII success and woes - jebem - 02-17-2015, 03:05 PM
RE: HP 32SII success and woes - jebem - 02-20-2015, 03:39 PM
RE: HP 32SII success and woes - rprosperi - 02-28-2015, 04:32 AM



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