General Information 1 - 7 OKIFAX 5300/5600Service Manual, P/N 59278301(01) Self-diagnosis• CPU ROM/RAM check• FLASH (/MASK) memory check (Program, Language, Default)• RAM check• RAM check (MEMORY board: option)• PC-IF board (parallel) check• Print test(02) Sensor calibration (Adjustment of scanning level)(03) LED test(04) Tone send test(05) Multi-frequency (MF) send test(06) High-speed modem send test(07) High-speed modem receive test(08) Tone (TEL/FAX) test(09) Remote diagnosis(10) System reset(11) Service default report (Machine setting for service engineer)1.4 General Appearance