HP FAX-750 Service Manual - Page 148

3.12 Equipment Error Code Indication n Function This function displays an error code of the last error on the LCD. n Operating Procedure (1) Press the 8 and 2 keys in this order in the initial stage of the maintenance mode. The LCD shows the "MACHINE ERROR _ _" (for 2-digit error code indication) or "MACHINE ERR _ _ _ _" (for 4-digit error code indication). (2) To stop this operation and return the equipment to the initial stage of the maintenance mode, press the Stop key. 3.13 Output of Transmission Log to the Telephone Line n Function This function outputs the transmission log (that the equipment has stored about the latest transmission) to the telephone line. It allows the service personnel to receive the transmission log of the user's equipment at a remote location and use it for analyzing problems arising in the user's equipment. n Operating Procedure (1) If the user's equipment has a transmission-related problem, call the user's equipment at a remote location from your equipment. (2) If the line is connected, have the user perform the following: 1) For FAX750/FAX770/FAX870MC/MFC970MC: Press the Function, Mode, and 0 keys in this order. For FAX-910/FAX-920/FAX-921/FAX-930/FAX-931/MFC-925: Press the Menu, Mode, and 0 keys in this order. 2) Press the 8 and 7 keys. The above operation makes the user's equipment send CNG to your equipment for sending the transmission log. (3) If you hear the CNG sent from the user's equipment, press the Start key of your equipment. Your equipment will start to receive the transmission log from the user's equipment. V - 55