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Chapter 5
Troubleshooting
5.1 Troubleshooting....................................................................................................5-1
5.2 Unit Level Troubleshooting .................................................................................5-3
5.2.1 Printer does not operate at power on................................................................................... 5-4
5.2.2 Error is detected ..................................................................................................................... 5-5
5.2.3 Failure occurs during printing .............................................................................................. 5-6
5.2.4 Printer does not feed the paper correctly ............................................................................ 5-7
5.2.5 Control panel operation is abnormal.................................................................................... 5-8
5.3 Unit Repair C206 PSB/PSE Board .......................................................................5-9
5.3.1 Unit Repair - C206 Main Board ............................................................................................ 5-11
5.4 Repair of the Printer Mechanism.......................................................................5-13
EPSON Stylus Color 400 Service Manual
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 trouble shooting process.
START
Unit Level Troubleshooting
Unit Repair
(C206 PSB/PSE)
Unit Repair
(C206 Main)
Unit Repair
Printer Mechanism
Disassemble and Adjustment
END
Figure 5-1. Troubleshooting Process Flowchart
Table 5-1. Motor Resistance and Measurement Procedure
Motor Name
Location
Check Point
Resistance
CR Motor
CN6(C206 MAIN)
1-pin & 3-pin,
2-pin & 4-pin
7.8 Ohms
±
10%
PF(Pump) Motor
CN7(C206 MAIN)
1-pin & 3-pin,
2-pin & 4-pin
7.8 Ohms
•}
10%
Table 5-2. Sensor Check
Sensor Name
Check Point
Signal Level
Sensor Status
Paper end sensor
CN4 / 1-pin, 2-pin
Open: less than 0.7 V
Paper exit
Close: more than 2.4 V
No paper
Carriage home
position sensor
CN5 / 1-pin, 2-pin
Open: less than 0.7 V
Home position
Close: more than 2.4V
Out of home position
ASF phase Sensor
CN11 / 1-pin, 2pin
Open: less than 0.7 V
Home position
Close: more than 2.4 V
Out of home position
Black cartridge
sensor
CN8 / 1-pin, 18pin On: 0 V
Black cartridge out
Off: more than 2.4 V
Black cartridge exit
Color cartridge sensor CN8 / 2-pin, 18-pin
On: 0 V
Color cartridge out
Off: more than 2.4 V
Color cartridge exit
Thermistor
CN8 / 3-pin, 18-pin Analog data
Change the VH voltage of
charge pulse for common
driver circuit
Rev. A
5-1
Chapter 5 Troubleshooting
Table 5-3. Printer Condition and Panel Status
Indicators
Error status
Recovery
Power
Ink Out
(Black)
Ink Out
(Color)
Paper Out
Paper Out
---
---
---
On
Load paper by pressing
load/eject button.
Paper jam condition
---
Off
Off
Blink
Eliminate a paper then press
load/eject button.
No Ink cartridge or Ink
end(black)
---
On
---
---
Install a new black ink cartridge
by pressing load/eject button for
3-seconds.
No Ink cartridge or Ink
end(color)
---
---
On
---
Install a new color ink cartridge
by pressing load/eject button for
3-seconds.
Maintenance request
Blink
Blink
Blink
Blink
Change the waste ink drain
tank and reset the EEPROM.
Fatal error
Blink
On
On
Blink
Turn on the printer and turn it
on again. If printer can not
recover, repair the suitable part.
5-2
Rev.A
EPSON Stylus Color 400 Service Manual
5.2 Unit Level Troubleshooting
When a problem occurs, you can identify the defective unit according to the symptoms exhibited.
The table below lists the symptoms of certain problems. Once the problem is identified, refer to the
flowchart that corresponds to the problem.
Table 5-4. Symptom and Problem
Symptom
Problem
Flowchart No.
Printer does not operate at
power on
•¡
LEDs do not light up.
•¡
Printer mechanism does not operate.
Section 5.2.1
Error is detected
•¡
Error is indicated by LED indication.
Section 5.2.2
Failure occurs during printing
•¡
Printing is not performed.
•¡
Abnormal printing(missing dot, etc.)
•¡
Print quality is poor
Section 5.2.3
Printer does not feed the paper
correctly
•¡
No paper is fed.
•¡
Paper feed is irregular.
•¡
Paper jam occurs.
Section 5.2.4
Control panel operation is
abnormal
•¡
No response to button access.
Section 5.2.5
Rev. A
5-3
Chapter 5 Troubleshooting
5.2.1 Printer does not operate at power on
START
Is AC
power voltage
normal?
NO
Input normal
power supply.
YES
Is the
fuse(F1) of
power supply
Exchange the fuse.
Disconnect CN10 in
the main board and
turn the power on
again.
board
opened?
YES
NO
Check output voltage
of CN2 in the power
supply board.
NO
Is the
fuse opend
again?
YES
Is the
output voltage
of power supply
normal?
NO
YES
Exchange the main
board.
Exchange the power
supply board
Check the motor and
head. Refer to the
repair item of the
printer mechanism.
END
Figure 5-2. Flow Chart 1
5-4
Rev.A
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