Artifact Details

Description

These modules are PCBs intended to be inserted in a card cage. There is an extraction handle attached to the front of the card, on which a paper label containing the model number, serial number, and other information is printed.

Opposite the handle there are 47 bifurcated gold-plated contacts arranged in two rows. Mounted on the component side of the PCB are the active and passive components, consisting mainly of transistors, diodes, resistors, capacitors, and jumpers.

All the cards have various quality control stamps on one or both sides of the PCB.

This catalog number consists of the following logic module quantities and types:
DB50 1 Shift register
DX21 1 Comparator
DX21.2 1 Comparator
DX52 1 Shift register

Manufacturer

Xerox Data Systems, Inc. (XDS)

Identifying Numbers

Model number	DB50	Printed in black ink at the top of the extraction handle.
Model number	DX21	Printed in black ink at the top of the extraction handle.
Model number	DX21.2	Printed in black ink at the top of the extraction handle.
Model number	DX52	Printed in black ink at the top of the extraction handle.
Other number	10877D	Stamped in black ink on the circuit side of the DB50 module.
Other number	110570G	Stamped in black ink on the circuit side of the DB50 module.
Other number	111741B	Stamped in black ink on the circuit side of the DB50 module.
Other number	137850D	Stamped in black ink on the circuit side of the DB50 module.
Serial number	6346372	Printed vertically in black ink on the extraction handle of a QB53 module.
Serial number	865195	Printed vertically in black ink on the extraction handle of a QB53 module.
Serial number	95211223	Printed vertically in black ink on the extraction handle of a QB53 module.

Dimensions

overall: 6 in x 7/8 in x 5 5/8 in

Category

Component/module