Ricoh A172 Service Manual page 388

CUSTOMER SERVICE GROUP
BULLETIN NUMBER:
APPLICABLE MODEL: AFICIO 5106/5206
SUBJECT: AUTO COLOR CALIBRATION (ACC) PROCEDURE
GENERAL:
This bulletin is being published to provide a greater understanding of the Auto Color Calibration (ACC)
procedure. The following points must be understood prior to performing an ACC procedure:
1. Adjustment of ACC changes gamma settings.
2. ACC is intended to provide a "rough" adjustment or a "starting point" for the color calibration process.
3. ACC is designed to allow a customer to set gamma settings to "reasonably acceptable" standards,
however, manual adjustment of gamma settings by a Service Representative will provide optimal
copy quality.
4. In some cases, when copy quality is determined to be acceptable by the customer, ACC is not
required and should not be performed. If ACC is performed after manual adjustment of gamma
settings, the Service Representative settings will be lost if the previous settings are not selected
through ACC. Therefore, always save the Service Representative gamma settings in Permanent
memory as a back-up. For more information on Permanent and Temporary Memory, refer to the
Service Manual, page 4-33 (under NOTE).
5. The gamma settings stored in Permanent Memory for Printer Mode can not be changed. However,
the gamma settings stored in Permanent Memory for Glass-top Copy Mode can be changed.
6. ACC may not be required after a PM call.
7. The use of dry copy paper (<25% humidity) may result in "blasting" around text. If "blasting" around
text occurs, install fresh paper of greater than 25% humidity.
AUTO COLOR CALIBRATION (ACC) PROCEDURE:
NOTE: Because the reflectivity of the copy paper can affect the ACC results, it is recommended that you
use Hammermill, Color Copy Paper (long grain, PhotoWhite).
As mentioned in the Service Manual (Note: (a), page 3-6), be sure to plug the power cord in with
the Main Switch in the "OFF" position at machine installation. This will energize the Transfer Roll er
Heater and allow the internal temperature of the machine to stabilize. It may be necessary to have
the Transfer Roller Heater energized for 2 to 3 hours (depending on how cold an environment the
machine has been in).
TECHNICAL SERVICE BULLETIN
AFICIO 5106/5206 - 001 10/18/96
Continued...