Service mode In service mode the following can be performed: Print a service mode self test. Verify and set the page count. See “Setting the page count” on page 53. Set the cold reset default. See “Setting the cold reset default” on page 54. Set the demo page = true/false (used to remove the demo page from the service mode self test). Set the diagnostic functions on or off (for software developers’ use only). Entering service mode Use PJL commands to enter service mode and perform various service-mode configurations. See table 21. Users must use the exact character and case specified for PCL printer commands. The following are elements of a typical printer command:
escape character (begins escape sequence) value field (contains both alpha and numeric characters) group character escape character (begins escape sequence) parameterized character group character value field (contains both alpha and numeric characters) termination character (uppercase) Escape sequences can be combined into one escape sequence string. There are three important rules to follow when combining code: 1 The first two characters after the escape character (the parameterized and group characters) must be the same in all of the commands to be combined.
2 When combining escape sequences, change the uppercase (termination) character in each individual escape sequence to lowercase. 3 The final character of the combined escape sequence must be uppercase. Entering escape characters Printer commands always begin with the escape character ( E C ). The following table shows how the escape character can be entered from various DOS software applications Table 20.
Escape character table 52 Chapter 3 Printer configuration C7058-90936 parameterized character termination character (uppercase) termination character (uppercase) DOS software Application entry What appears Lotus 1-2-3 Type \027 027 Word Perfect for DOS Type MS-DOS Edit Hold down Ctrl-P, and press Esc MS-DOS Edlin Hold down Ctrl-V, release, then press [ ^[