Z3801a Service Manual -

The original Motorola Oncore GPS receiver (VP Oncore UT+) is obsolete. The service manual does not cover modern replacements, but it provides critical pinout information (Table 3-4). Using this pinout, advanced users can adapt a or NEO-M8N to output 1 PPS and NMEA sentences to the Z3801A’s CPU.

The is less a document and more of an urban legend. If you find a PDF claiming to be the original, check the date code. If it is post-2010, it is likely a community compilation. z3801a service manual

If you own a Z3801A, do not look for the manual. Back up the battery-backed SRAM first. The manual won't save you; the firmware will. The original Motorola Oncore GPS receiver (VP Oncore