Ricoh B264 Service Manual page 277

2902 Test Pattern
2902 2 IPU Test Pattern
Prints the test patterns for the IPU chip.
This SP mode is useful for finding whether the BICU or the SBU is defective. If the
printout is not OK, the BICU is defective.
2902 3 Printing Test Pattern
Prints the printer test patterns. Select the number of the test pattern that you want
to print.
This SP mode is useful for finding whether the LDDR or the BICU is defective. If
the printout is not satisfactory, the LDDR is defective.
2909* Main Scan Magnification
Adjusts the magnification in the main scan direction for copy mode and printer
mode. Press  to toggle ±.
2909 1* Copier
2909 2* Printer
2911 Transfer Current On/Off Timing
2911 1 La (On Timing)
Adjusts the transfer current on timing at leading edge.
2911 2 Lb (Switch Timing)
Adjusts the transfer current switch timing. This determines when the leading edge
stops and the image area current begins (see SP2-301).
2911 3 Lc (Off Timing)
Adjusts the transfer current off timing. (e.g. –5 mm is 5 mm after the trailing edge.)
2912* Drum Reverse Rotation Interval
2913* Print Density for Test Pattern
Sets the print density for the patterns printed with SP2-902-3.
SM
SERVICE PROGRAM MODE TABLES
Pattern 0 ~ 15 ( 5.2.4)
Pattern 0 ~ 38( 5.2.4)
[–2.0 ~ +2.0 / 0 / 0.1% step]
[–2.0 ~ +2.0 / 0 / 0.1% step]
[–30 ~ +30 / 0 mm / 1 mm step]
[0 ~ +30 / 10 mm / 1 mm step]
[–30 ~ +30 / – 5 mm / 1 mm step]
DFU
[0 ~ 15 / 15 / 1]
5-13 B264/B265