UX-B20U/UX-B20C/B25C
3 – 4
5. Overall troubleshooting of Printer
• BOTH CARRIER MOTOR AND FEED MOTOR
ARE NG.
NG
OPEN
REPLACE FU101
OK
FUSE "FU101"
+30V CNHEAD1(8PIN)
CHECK RESISTANCE
B30V AND GND.
SHORT OR NOT
CHECK IC10
REPLACE CONTROL PWB
REPLACE IC10
SHORT
CHECK +30V PATTERN
REPLACE CONTROL PWB
NO
OK
OK
NG
REPLACE FEED MOTOR
OK
CHECK WAVEFORMS IC10 (19,21,25,27PIN)
REPLACE CONTROL PWB
NG
• FEED MOTOR IS NG (CARRIER MOTOR IS
GOOD)
• CARRIER MOTOR IS NG (FEED MOTOR IS
GOOD)
REPLACE CARRIER
OK
CHECK WAVEFORMS IC10 (19,21,25,20PIN)
REPLACE CONTROL PWB
NG