3-35
Confidential
Adjusting print head angle relative to carriage
For optimal image printing, the print head nozzle array must be perpendicular to the head/carriage
unit's line of travel. Manufacturing limitations, however, make perfect alignment impossible during
mass production. The angle must be adjusted at the individual machine level.
The following describes this adjustment mechanism's components and their roles.
Slider L, the slider, and the rib attach the head/carriage unit to the CR chassis. The rib acts as a
pivot for the slider's damping spring pressing the carriage to the rear. Slider L has a skew adjustment
knob that shifts the slider back and forth, adjusting the angle of this backward pressure. Rotating the
skew adjustment knob tilts the entire head/carriage unit, thus adjusting the print nozzle vertical angle
relative to the carriage unit's line of travel.
This knob offers 15 settings, from -7 to +7.
Viewed from the bottom
Slider
CR encoder sensor
Slider L
Head skew
adjuster knob
(Front)
Rib
CR timing belt
CR encoder strip
Absorber spring
Summary of Contents for FAX 1840C
Page 1: ...Confidential FACSIMILE EQUIPMENT SERVICE MANUAL MODELS MFC3340CN 3240C FAX1940CN 1840C 1835C ...
Page 9: ...Confidential CHAPTER 1 PARTS NAMES FUNCTIONS ...
Page 18: ...Confidential CHAPTER 2 SPECIFICATIONS ...
Page 50: ...Confidential CHAPTER 3 THEORY OF OPERATION ...
Page 91: ...Confidential CHAPTER 4 TRANSFER OF DATA LEFT IN THE MACHINE TO BE SENT FOR REPAIR ...
Page 96: ...Confidential CHAPTER 5 DISASSEMBLY REASSEMBLY AND LUBRICATION ...
Page 167: ...5 69 Confidential Viewed from the left ...
Page 171: ...Confidential CHAPTER 6 ADJUSTMENTS AND UPDATING OF SETTINGS REQUIRED AFTER PARTS REPLACEMENT ...
Page 191: ...6 18 Confidential Vertical Alignment Check Patterns ...
Page 193: ...6 20 Confidential Margin Check Pattern ...
Page 202: ...Confidential CHAPTER 7 CLEANING ...
Page 205: ...Confidential CHAPTER 8 MAINTENANCE MODE ...
Page 216: ...8 9 Confidential Scanning Compensation Data List a b c d e f i ...
Page 236: ...8 29 Confidential 1st sheet 2nd sheet Vertical Alignment Check Patterns ...
Page 239: ...8 32 Confidential Margin Check Pattern ...
Page 249: ...Confidential CHAPTER 9 ERROR INDICATION AND TROUBLESHOOTING ...
Page 253: ...9 2 Confidential ...
Page 254: ...9 3 Confidential ...
Page 371: ...B Power Supply PCB U S A and Canadian models Confidential ...
Page 372: ...B Power Supply PCB European and Asian models Confidential ...
Page 401: ...Confidential February 05 SM FAX032 8XA901 5 Printed in Japan ...