Ricoh FW780 Service Manual - Page 464

! PARTS Note: This copy is intended as a master original for reproduction of additional bulletins. ! COPY QUALITY TECHNICAL SERVICE BULLETIN BULLETIN NUMBER: A163/A251/A252 - 005 APPLICABLE MODEL: GESTETNER - N/A RICOH - FW740/750/760 SAVIN - N/A 02/14/2000 SUBJECT: OVERTONING SYMPTOMS: 1. Background may appear on the copy. 2. The Used Toner Tank may fill up before the "Toner Overflow Indicator" begins to light. CAUSE: As developer deteriorates, the charge on the toner will gradually drop. This may cause excess toner to be supplied to the Development Unit and cause the toner density to become too high. SOLUTION: The software controlling the toner supply ratio has been changed. In the new software, the TS Level (Toner Supply Ratio) has been changed as follows: TS Level Old New 0 No supply No supply 1 7.5% 7.5% 2 15% 7.5% 3 30% 7.5% 4 50% 15% 5 100% 100% NOTE: The suffix of the ROM has been changed from A1635208A to A1635208B (FW740), A2515228C to A2515228D (FW750), & A2525238C to A2525238D (FW760). The Main PCB ROM revision "D" file name A251MA1D.EXE (FW750), file name A252MA1D.EXE (FW760) and ROM Revision "B" file name A163ma1B.exe (FW740) can be downloaded through the Ricoh Technical Services FTP Site http://tsc.ricohcorp.com. NOTE: Refer to Facts Line Bulletin # FL002 for more information about the FTP Internet Web Site. UNITS AFFECTED: All A251 and A252 machines manufactured after the Serial Numbers listed below will have the new firmware installed during production. MODEL NAME Ricoh FW740 Ricoh FW750 Ricoh FW760 SERIAL NUMBER N/A A7829020131 A7839020084 ! FIRMWARE RICOH GROUP COMPANIES CONTROL NO. 018WID