5-17
BJC-7100
Part 5: Maintenance
Check motor drive voltage.
OK?
Check carriage motor.
OK?
Replace carriage motor.
Check power cable.
No
Yes
Yes
No
A
OK?
Replace AC adaptor.
Replace power cable.
No
Yes
• Check the connection and conductivity
of the power cable that links the logic
board with the AC adaptor.
Measuring point
Logic board CNPWR
Pin No. 3
Normal value
27.6
±
1.5VDC (no load max 33V)
Measuring point
Normal value
Approx. 8.3
Ω
CNCR
1-4
2-3
Replace logic board.
• Faulty motor driver IC
• Faulty MPU
• Faulty PCB
soldering/conductivity
1
4
Red
1
2
3
4
A
B
B
A
Approx.
8.3
Ω
/phase
Carriage motor
Blue
Orange
Yellow
Logic board side
AC adaptor side
1
2
3
4
5
6
7
8
Содержание BJC-7100
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