Epson 4003353 - Manual (Page 99)

Stylus Color service Manuel Troubleshooting
5.1 OVERVIEW
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.
UNIT LEVEL TROUBLESHOOTING
ASSEMBLY
AND
ADJUSTMENT
Figure 5-1. Troubleshooting Process
Table 5-1. Motor Resistance
Flowchart
Motor Resistance Remark
CR Motor 1 At25‘C (77
PF Motor 11.5 + At25‘C (77
Table 5-2. Sensor Status
Sensor Point Signal Level status
H (5V) Paper exist
PE Sensor CN8 / Pin 1
L (GND) No paper (Paper end)
L (GND) Black cartridge exist
BCO Sensor CN11 / Pin 8
H (5V) No black cartridge
L (GND) Color cartridge exists
CCO Sensor CN12 / Pin 8
H (5V) No color cartidge
L At home position (HP)
HP Sensor CN9 / Pin 3
H Out of HP
Change the pulse width of the
TH Sensor CN1O / Pin 10 Analog data charge pulse for the common
driver circuit
Rev. A
5-1