UX-B700U
FO-B1600U
5. Overall troubleshooting of Printer
• BOTH CARRIAGE MOTOR AND FEED MOTOR
ARE NG.
NG
OPEN
REPLACE FU1
OK
FUSE “FU1”
+30V CNPRINT 1,3
CHECK RESISTANCE
BETWEEN +30V AND GND.
SHORT OR NOT
CHECK IC3
REPLACE PRINTER PWB
REPLACE IC3
SHORT
CHECK +30V PATTERN
REPLACE PRINTER PWB
NO
OK
OK
NG
REPLACE PRINTER PWB
OK
CHECK WAVEFORMS IC3 (19,21,25,27)
CHECK IC1
REPLACE PRINTER PWB
REPLACE IC1
NG
OK
NG
• FEED MOTOR IS NG (CARRIAGE MOTOR IS
GOOD)
• CARRIAGE MOTOR IS NG (FEED MOTOR IS
GOOD)
REPLACE PRINTER PWB
OK
CHECK WAVEFORMS IC8 (19,21,25,20)
CHECK IC1
REPLACE PRINTER PWB
REPLACE IC1
NG
OK
NG
3 – 4
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