Epson DFX-9000 Service Manual page 112

Epson DFX 9000
3.3.1.3 Printhead coil resistance values
Head coil resistance is 4.1 ~ 4.9 ohm at 20 °C.
Table 3-5. Printhead - Contact pin assignment
Contact (lead) Front PCB Front PCB
number side A side B
1 SEN1
2 R-7 pin L-7 pin
3 R-5 pin l-5 pin
4 R-3 pin L-3 in
5 R-1 pin L-1 pin
6 R-9 pin L-9 pin
7 + 42 V + 42 V
8 + 42 V + 42 V
9 + 42 V + 42 V
10 + 42 V + 42 V
11 + 42 V + 42 V
12 + 42 V + 42 V
13 + 42 V + 42 V
14 + 42 V + 42 V
15 + 42 V + 42 V
16 L-2 pin R-8 pin
17 L-4 pin R-2 pin
18 L-6 pin R-4 pin
19 L-8 pin R-6 pin
20 --- SG1
Troubleshooting
Rear PCB Rear PCB
side A side B
--- --- SEN2
R-7 pin L-7 pin
R-5 pin L-5 pin
R-3 pin L-3 pin
R-1 pin L-1 pin
R-9 pin L-9 pin
+ 42 V + 42 V
+ 42 V + 42 V
+ 42 V + 42 V
+ 42 V + 42 V
+ 42 V + 42 V
+ 42 V + 42 V
+ 42 V + 42 V
+ 42 V + 42 V
+ 42 V + 42 V
L-2 pin L-8 pin
L-4 pin R-2 pin
L-6 pin R-4 pin
L-8 pin R-6 pin
SG2 ---
Figure 3-2. Printhead coil resistance check point
Troubleshooting
B(F) #20 B(F) #1
A(R) #20 A(R) #1
Revision B
105