Xerox 240/242/250/252/260 Repeating Bands,Streaks,Spots

Repeating Bands,Streaks,Spots and Smears
Bands,Streaks,Spots and Smears appear on  the image at a regular pitch
Measure the distance between the repeating defects.
locate the distance on the table below and perform the indicated repair action
repetition spacing (mm)		Components
0.3		ROS
1		developer assembly/developer drive
2		developer assembly/developer drive
6		developer assembly/developer drive/IBT
44		drum charging roller (PCR) -YMC
36		developer roller (K,Y,M,C)
36 (Horizontal strikes)		developer drive
58		1st BTR
62.8		2nd BUR
88		2nd BTR
98		Fuser belt
110		Heat Roll
126		Y/M/C Drum
188		Black drum

xerox DC 240/242/250/252/260 error code 042-326

error description- IBT Belt Home Position too long

1.Check that the Transfer Belt is in the center (where the IBT Belt Edge and the IBT Belt Frame are approx. the same distance from the front and rear). Center if required 
  2.There is a small silver color sensor on the back side of the transfer belt on top side you will see it while moving the belt with hand slowly there is a black spot on top its the sensor, which needs to be cleaned with a wet tissue paper and then reset reset NVM location 741-105 to 0.


Note- How to change NVM (non volatile memory) in xerox 240/242/250/252/260

Hold down 0 (zero) for 5 seconds and press start (green) button
enter 6789, confirm
press log in/log out button or the key button
press systems settings, common settings, maintenance, NVM read/ write
enter nvm 741-105 and change it to 0 (zero)