Epson Stylus COLOR 3000 Service Manual - Page 129

General Description, Motor, Connector, Test pin No., Test method, Meter reading

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EPSON Stylus COLOR 3000 5.1 General Description This section describes procedures for isolating the failure unit in 2 levels; unit level troubleshooting and the component level troubleshooting. Refer to the flowchart below to isolate the defective unit and perform repair at the component level. Table 5-1, Table 5-2 and Table 5-3 show the coil resistance for the motors, sensor status , and error codes and error condition, respectively. Figure 5-1. Troubleshooting Flowchart Table 5-1. Coil Resistance for the Motors Motor CR motor Connector No. Test pin No. Test method (Set the multimeter to Ohms. Be sure to unplug the power cable from the AC inlet and disconnect the harnesses from the MAIN board.) Meter reading CN22 Pin 1 and Pin 2 Place one lead to the Pin 1 and the other to 5 Ω ± 7 % or the Pin 2, then check the coil resistance per (at 25••, Pin 3 and Pin 4 phase. per phase) Pump Motor CN20 Pin 1 and Pin 2 Place one lead to the Pin 1 and the other to 7.7 Ω ± 10 % or the Pin 2 and check the coil resistance per (at 25 °C Pin 3 and Pin 4 phase. per phase) PF motor CN15 Pin 1 and Pin 3 Place one lead to the Pin 1 and the other to 10 Ω ±10 % or the Pin 2 and check the coil resistance per Pin 2 and Pin 4 phase. (at 25 °C per phase) Rev. A 5-1

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EPSON Stylus COLOR 3000
Rev. A
5-1
5.1 General Description
This section describes procedures for isolating the failure unit in 2 levels; unit level troubleshooting and
the component level troubleshooting. Refer to the flowchart below to isolate the defective unit and perform
repair at the component level. Table 5-1, Table 5-2 and Table 5-3 show the coil resistance for the motors,
sensor status , and error codes and error condition, respectively.
Table 5-1. Coil Resistance for the Motors
Motor
Connector
No.
Test pin No.
Test method
(Set the multimeter to Ohms. Be sure to
unplug the power cable from the AC inlet
and disconnect the harnesses from the
MAIN board.)
Meter reading
CR
motor
CN22
Pin 1 and Pin 2
or
Pin 3 and Pin 4
Place one lead to the Pin 1 and the other to
the Pin 2, then check the coil resistance per
phase.
5
Ω
±
7 %
(at 25
••
,
per phase)
Pump Motor
CN20
Pin 1 and Pin 2
or
Pin 3 and Pin 4
Place one lead to the Pin 1 and the other to
the Pin 2 and check the coil resistance per
phase.
7.7
Ω
±
10 %
(at 25
°
C
per
phase
)
PF
motor
CN15
Pin 1 and Pin 3
or
Pin 2 and Pin 4
Place one lead to the Pin 1 and the other to
the Pin 2 and check the coil resistance per
phase.
10
Ω
±
10 %
(at 25
°
C
per
phase
)
START
Troubleshooting at the unit level
Reapir of the unit
(C172 PSB/PSE board)
Repar of the unit
(C203 MAIN board)
Repair of the unit
(M-4J60 printer mechanism)
Disassembly, assembly and adjustment
END
Figure 5-1. Troubleshooting Flowchart