My Projects

Published 28 Jan 2021

Nec DTR-16D-1A


DTR-16D-1A overview

Overview

Nec Dterm Series i PABX phone.

Hardware Description

Supports 16 incoming lines. Can be powered off 27V DC through socket underneath, centre terminal negative. It uses a 24 character by 3 line LCD display. When powered up but not connected to a PABX nothing lights up, but it has a built in self test mode - hold down the * and # keys for ten seconds while applying power, then release the keys after about 10 seconds.

Components

  • LCD, 3 rows of 24 alphanumeric characters.
  • Nec D78F0078GK (µPD780078 8-Bit Single-Chip Microcontroller) (Nec 780076GK in DTR-8D)
  • Nec NG-150024, CL-032A

Examples

DTR-16D-1A top
DTR-16D-1A DTR-16D-1A

DTR-16D-1A

DTR-16D-1A sockets

DTR-16D-1A sockets

DTR-16D-1A sockets


Tear down

DTR-16D-1A
DTR-16D-1A

DTR-16D-1A
DTR-16D-1A interior
DTR-16D-1A interior
DTR-16D-1A interior

DTR-16D-1A PCB front DTR-16D-1A PCB back

DTR-16D-1A PCB front DTR-16D-1A PCB back

References and Additional Resources

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