TIB837 - PF (Paper Feed) encoder sensor changed

Modified on Wed, 20 Oct, 2021 at 11:40 AM

A new, modified PF encoder sensor for has been introduced. This encoder sensor performs exactly in the same way but is not compatible with the old models because the shape of the mounting part is different.

This new PF encoder sensor is premounted by default on the following models:

Model	Serial
XPJ-1641SR	JF6U002554 or higher
XPJ-1682SR	JE6U001553 or higher
XPJ-1682WR	JN6U001501 or higher
XPJ-1642WR	JX6U000058 or higher

NOTE:

When ordering a replacement PF encoder sensor, make sure to order the correct part number for the correct Serial N° of your printer!

Since the sensor is different in shape, it has an impact on the mounting and the orientation of the encoder-scale disc. This is because the "emitter" and "receiver" inside the sensor-assembly have been inverted. A general rule of thumb is that the "emulsion side" (the "printed" side) of the encoder disk should always be nearest to the "receiver" side of the encoder sensor to obtain the best possible encoder signal quality:

	Old	New
Code	DG-49252	DH-40770
Name	PF Encoder Assy	PF Encoder Assy
Picture
Note	-	This encoder sensor is connected to a different cable: DH-40769 - PF Encoder Relay Cable Assy
Models	XPJ-1641SR, XPJ-1682SR, XPJ-1682WR, XPJ-1642WR

When the "emulsion-side" (printed side) of the encoder-disc is not located on the "receiver" side of the PF encoder signal, it may possibly trigger random feed-related issues or worst-case PF encoder errors.