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3 The printer alarm is displayed.
3-1 Printer internal RAM alarm
• Replace Q501 of the Power & Control Board.
3-2 S-I/F internal RAM alarms.
• Replace Q3 of the LXHI board.
3-3 S-I/F connection alarm.
• Replace the LXHI board.
3-4 Program ROM alarm.
• Replace Q1 of the Power & Control Board (EPROM).
3-5 S-I/F ROM alarm.
• Replace Q3 of the LXHI board.
3-6 EEPROM alarm.
• Is the voltage of Q5-8pin +5V?
• No Check TR5 and TR7 and pattern on the Power & Control Board.
Correct pattern or replace parts.
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• Yes Do signals of Q501 of the Power & Control Board (67 x 640) such as EECLK-
P and EEDIN-P and EECS-P have the waveforms shown in Fig. 6?
• No Replace Q501 of the Power & Control Board.
▼
• Yes Do signals of Q5 of the Power & Control Board (EEPROM) such as EEDIN-
P, EECS-P, EECLK-P and EEDOUT-P have the waveforms shown in Fig. 6?
• No Check EEDIN-P, EECS-P and EECLK-P patterns and parts
connected to the pattern. Correct pattern or replace parts.
▼
• Yes Replace Q501 of the Power & Control Board.
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