Troubleshooting - Epson Stylus Photo Service Manual

EPSON Stylus Photo

5.1 Troubleshooting

The printer may exhibit different symptoms for the same problem, which makes troubleshooting more
difficult. This section, however, provides simple and effective ways to facilitate troubleshooting.
The following flowchart illustrates the main steps of the troubleshooting process.
Table 5-1. Motor Resistance and Measurement Procedure
Motor Name
CR Motor
Assembly
PF(Pump) Motor
Assembly
Note*) Set the Multi-meter for measuring resistance range.
Make sure the power is off and remove the motor connectors from the main board.
Sensor Name
Paper end sensor
Carriage home
position sensor
(HP sensor)
ASF phase Sensor
Black cartridge
sensor
Color cartridge sensor CN8 / 2-pin,
Thermistor
Rev. A
Figure 5-1. Troubleshooting Process Flowchart
Location
CN6(C209 MAIN)
CN7(C209 MAIN)
Table 5-2. Sensor Check
Check Point
CN4 / 1-pin,
CN5 / 1-pin,
CN11 / 1-pin,
CN8 / 1-pin,
CN8 / 3-pin,
Check Point No.*
1 & 3pin or,
2 & 4pin
1 & 3pin or,
2 & 4pin
Signal Level
H (5V) No paper
L (GND) Paper in
H (5V) Home position
L (GND) Out of home position
H (5V) Friction(paper feeding) position
L (GND) Release(waiting) position
H (5V) Black ink cartridge out
L (GND) Black ink cartridge exists
H (5V) Color ink cartridge out
L (GND) Color ink cartridge exists
Resistance value It changes according to the
peripheral temperature.
(10KOhms 1% at 25 C)
Meter Reading
7.8 Ohms 10%
(25 C)
7.8 Ohms 10%
(25 C)
Sensor Status
5-1