[time-nuts] Z3805A Stock RS-232?

Brooke Clarke brooke at pacific.net
Mon Apr 22 22:26:14 UTC 2013


Hi:

I opened up my Z3805A and after looking at the bottom of the main board think it's already jumpered for RS-232.
See the bottom photo at: http://www.prc68.com/I/Z3805A.html#DB-25 near the DB-25 connector.
There's only 3 zero Ohm jumpers and none of them are where the Z3801 jumpers were.

Also is there a way to tell which GPS daughter board I have?
See the top side motherboard photo (click for larger, click again if (+) cursor:
http://www.prc68.com/I/Z3805A.html#DB-25
The metal can is marked:
326/2486
2643686MAD
and the PCB is marked:
TM-AB

The motherboard has many things that raise questions, like installed parts whose function is not clear, like:
6 LEDs near U1
J2 2x5 0.1" vertical header pins, JTAG?
J13 4-pin horizontal connector
S1 with 8 switches

Many component pads without components.

-- 
Have Fun,

Brooke Clarke
http://www.PRC68.com
http://www.end2partygovernment.com/2012Issues.html




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