Ricoh infotec 3671F Service Manual page 27

July 30th, 1996
Mirror Motor Failure:
The machine detects a mirror motor error when the MCB does not detect the
line synchronization detector signal within 1 second of the mirror motor being
turned on. The machine also detects a mirror motor error when the motor
rotation is not within 8431.7 rpm ± 5% at 4.2 seconds after the motor turns on
or if the motor is not within 8431.7 rpm ± 3% for more than 0.5 second during
mirror motor operation. Since this error is detected with the line
synchronization detector signal, the machine may detect LD malfunction as a
mirror motor failure. When these errors occur, the machine warns the user on
the LCD panel (SC code 3-31).
Cross reference
Service Call Conditions: section 7-3
3. Toner Saving Mode
In this machine, toner saving is done by reducing the number of dots actually
printed, not by varying the development bias. In toner saving mode, the
image data is filtered through the following four-line matrix.
1st line
2nd line
3rd line
4th line
(1: Actual data printed, black or white; 0: Always a white pixel)
•
Note: Toner saving mode only works when printing fax messages and re-
ports. (However, toner saving is disabled when receiving a half-
tone mode message in NSF/NSS mode.)
•
When toner saving mode is selected, the print image density is
automatically set to "Normal"; in some cases, the image may be-
come invisible if the Lighter setting is used.
Cross Reference
Toner Saving Mode: User parameter 12, bit 2
Edge Enhancement
In toner saving mode, the machine prints a black pixel whenever the data
changes from white to black in the main scan direction. In this way, edges on
the image are printed more clearly.
1 0 1 0 1 0 1 0 1 0 . . . . .
0 0 0 0 0 0 0 0 0 0 . . . . .
0 1 0 1 0 1 0 1 0 1 . . . . .
0 0 0 0 0 0 0 0 0 0 . . . . .
2-10
DETAILED SECTION DESCRIPTIONS
PRINTING