Sharp MX-2314N, Руководство по обслуживанию, Страница: 470 / 524

MX-3114N OPERATIONAL DESCRIPTIONS 13 – 50
E. Automatic pressure release system
Normally the upper and lower heat rollers are pressed. When, how-
ever, the following conditions are satisfied, the pressure is
released.
• When the machine shifts to the preheat mode.
• When the machine shifts to the auto power shut off mode.
• When the power switch of the operation panel is turned OFF.
• When the machine is left for 90 sec under the ready state.
• When in the envelope mode.
• When a jam occurs.
(1) Pressure release operation
The fusing pressure control motor (PRM) rotates to turn ON the
fusing pressure detector (HLPCD) (H level). When the specified
time passes after turning ON the fusing pressure detector (HLPCD)
(H level) by rotation of the fusing pressure control roller (PRM), the
pressure release motor stops to complete the pressure release
operation.
(2) Pressure release operation
When the end user makes some operations or when the machine
receives the Job signal, the fusing pressure control motor (PRM)
rotates reversely to drive the pressure release lever to the pressing
state.
When the specified time passes from turning OFF the fusing pres-
sure detector (HLPCD), the pressure release motor stops to com-
plete the pressing operation.
When turning OFF the main power switch of the machine, be sure
to turn OFF the power switch of the operation panel and check to
confirm that the LCD display goes off before turning OFF the main
power switch.
If the main power switch is turned OFF with the LCD lighted, the
power is cut off before completion of the pressure release opera-
tion. If this state is kept for a long time, the fusing roller may be
deformed.
F. Fusing section cleaning
(1) 23cpm machine
In this machine, the fusing section cleaning is performed by using
the oil cleaning roller for cleaning the fusing roller.
The cleaning unit is composed of the oil cleaning roller, the metal
roller, and the cleaning plate.
Residual toner on the fusing roller (B) is cleaned by the cleaning
roller which contains silicon oil.
Residual toner on the metal roller is scraped away by the cleaning
plate.
(2) 26cpm/31cpm machine
In this machine, the fusing roller (B) is cleaned by the web.
The cleaning unit is composed of the web feed roller, the winding
roller, and the backup roller which presses the web onto the fusing
roller (B) with the proper pressure.
Residual toner on the fusing roller (B) is cleaned by the web which
contains silicon oil.
HLPCD
HLPCD
Fusing roller (B)
Oil cleaning roller
Metal roller
Cleaning plate
Winding side
Feed side
Fusing roller (B)
Backup roller
Web sheet