
3-17
Confidential
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Ink cartridges
Ink empty
Filled with ink
Sensor
actuator
Valve
Disc-valve D
Disc-valve S
Air
Ink
Ink cartridge
sensor
Ink cartridge features
This machine uses four ink cartridges: a black one and three color ones with a slightly lower capacity.
Previous versions featured horizontal insertion over metal needles fixed to the chassis. This one
features vertical mounting in the ink refill base over plastic needles.
This vertical arrangement requires two ports in the bottom of the cartridge: one supplying the ink for
printing and another supplying air to replace that ink. Both ports have disc valves preventing ink
leakage. Mounting a cartridge over the plastic needles in the ink refill base forces these valves open
to secure flow paths for both the ink and the air.
Inks
"Removing air"
An earlier page explained how too much air in the ink risks air bubbles degrading ink-jet
performance. The manufacturing process prevents such air bubbles with a step, deaeration, that
removes air from the ink before injection into the cartridge. Vacuum packaging then prevents air
contamination during shipping and storage.
"Pigment-based ink"
Previous Brother machines used only dye-based inks. This one switches to a pigment-based ink for
black only, reducing fuzziness from print character outlines, boosting resolution for black dots, and
producing clearer images on plain paper.
This machine provides separate head caps and individual vent unit drive mechanisms for this black
pigment-based ink and its dye-based color counterparts. Such special design measures are necessary
because any mixing of the two types triggers a chemical reaction producing residue clogging head
nozzles, filters, maintenance unit piping, and other components, degrading print performance.
Содержание FAX 1840C
Страница 1: ...Confidential FACSIMILE EQUIPMENT SERVICE MANUAL MODELS MFC3340CN 3240C FAX1940CN 1840C 1835C ...
Страница 9: ...Confidential CHAPTER 1 PARTS NAMES FUNCTIONS ...
Страница 18: ...Confidential CHAPTER 2 SPECIFICATIONS ...
Страница 50: ...Confidential CHAPTER 3 THEORY OF OPERATION ...
Страница 91: ...Confidential CHAPTER 4 TRANSFER OF DATA LEFT IN THE MACHINE TO BE SENT FOR REPAIR ...
Страница 96: ...Confidential CHAPTER 5 DISASSEMBLY REASSEMBLY AND LUBRICATION ...
Страница 140: ...5 42 Confidential n Reassembling Notes Route the battery harness beneath the ink supply tubes as shown below ...
Страница 167: ...5 69 Confidential Viewed from the left ...
Страница 171: ...Confidential CHAPTER 6 ADJUSTMENTS AND UPDATING OF SETTINGS REQUIRED AFTER PARTS REPLACEMENT ...
Страница 189: ...6 16 Confidential Paper Feeding Check Patterns for the Paper Feed Roller and Paper Ejection Roller A Þ B Þ ...
Страница 191: ...6 18 Confidential Vertical Alignment Check Patterns ...
Страница 193: ...6 20 Confidential Margin Check Pattern ...
Страница 202: ...Confidential CHAPTER 7 CLEANING ...
Страница 205: ...Confidential CHAPTER 8 MAINTENANCE MODE ...
Страница 213: ...8 6 Confidential FAX1940CN 1840C 1835C Black Start Mono Start key Stop Exit key Menu Set key and keys ...
Страница 216: ...8 9 Confidential Scanning Compensation Data List a b c d e f i ...
Страница 233: ...8 26 Confidential Paper Feeding Check Pattern for the Paper Feed Roller and Paper Ejection Roller A Þ B Þ ...
Страница 236: ...8 29 Confidential 1st sheet 2nd sheet Vertical Alignment Check Patterns ...
Страница 239: ...8 32 Confidential Margin Check Pattern ...
Страница 249: ...Confidential CHAPTER 9 ERROR INDICATION AND TROUBLESHOOTING ...
Страница 253: ...9 2 Confidential ...
Страница 254: ...9 3 Confidential ...
Страница 371: ...B Power Supply PCB U S A and Canadian models Confidential ...
Страница 372: ...B Power Supply PCB European and Asian models Confidential ...
Страница 401: ...Confidential February 05 SM FAX032 8XA901 5 Printed in Japan ...