Epson LQ-1170 Service Manual page 90

5.1 OVERVIEW
Problems in the printer may exhibit a variety of symptoms,
troubleshooting, unless you follow the procedure shown in the
5 . 3
Repair of the
power supply board
The following tables provide troubleshooting information.
Part
Carriage motor
Paper-feed motor
Error Display
Buzzer beeps 3 times for
0.1 second, with O. l-sec-
ond intervals.
Buzzer beeps 5 times for
0.5 second, with 0.5-sec-
ond intervals.
5 - 1 4
Repair of the
main\ drive board
The fault is corrected
Figure 5-1. Troubleshooting Procedure
Table 5-1. Motor and Printhead Coil R e s i s t a n c e
Coil resistance 79.0 +\– 5 ohms at 25 degrees C (77 degrees F)
Coil resistance 45.5 +\– 3.0 ohms at 25 degrees C (77 degrees F)
Table 5-2. Error Codes
I
Error
I
Paper-out error
Carriage error
START
5 . 2 5 - 2
Repair by
unit replacement
5 . 4 5 - 1 6
Specifications
. Printer is out of paper.
. Paper-end sensor is abnormal.
. Carriage motor is abnormal.
5-1
which can complicate
flowchart below.
5 . 5 5 - 1 9
Repair of the printer
mechanism
Cause
REV.-A
the task of