Troubleshooting - Epson Stylus 1500 Service Manual

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.
Table 5-1. Motor Coil Resistance Test Points
Motor
Test Pin
Connector
Number
Number
Common pin: 5
CR Motor
Test pins:
(CN5)
1, 2, 3, 4
PF Motor 1 and 3 /
(CN6) 2 and 4
Sensor Test Points
CN9
HP Sensor
Pin 1 to 2
Front CN10
PE Sensor Pin 1 to 2
Rear CN11
PE Sensor Pin 1 to 2
Black Ink End CN12
Sensor Pin 1 to 2
Black Ink
CN13
Cartridge
Pin 1 to 2
Sensor
Release CN14
Sensor Pin 1 to 2
Disengage
CN15
Gear
Pin 1 to 2
Sensor
CN7
TH Sensor Pin 13 to Pin
16, 18, or 20
EPSON Stylus 1500 Service Manual
Test Method
(Set Meter to Ohms. Disconnect
Motor from Main Board and Check it
with Printer Power Off.)
Place one lead on pin 5 and the other
lead on each of the 4 test pins to
check the two motor phases.
Place one lead on pin 1 (pin 2) and
the other lead on pin 3 (pin 4) each of
the test pins to check the two motor
phases.
Table 5-2. Sensor Status
Signal Level
H (>2.5 V) In home position (HP)
L (GND) Away from HP
Open Paper present
Closed No paper (Paper end)
Open Paper present
Closed No paper (Paper end)
Closed and
Black ink
Ink present
cartridge
sensor closed
Any other Ink end
Open No black ink cartridge
Closed Black ink cartridge installed
Open Friction feed
Closed Tractor Feed
Open Disengage gear is on pump side
Closed Disengage gear is on print side
Change the pulse width of the charge pulse
for the common driver circuit.
Analog data
Themistor resistance: Approx.10K Ω
(at 25° C, 77° F)
Meter Reading
5 Ω ± 7 %
(At 25° C, 77° F)
10 Ω ± 10 %
(At 25° C, 77° F)
Status
5-3