Unit Replacement - Epson LQ-510 Technical Manual

REV.-A
5.1 GENERAL
Troubleshooting is based on the concept that error symptoms vary according to the defective component.
Troubleshooting may involve either unit replacement or unit repair, each of which is treated separately below.
First try to determine the defective unit by referring to Section 5.2. The flow charts in the section should
help you isolate the defective unit. Then refer to Section 5.3 for instructions for further checking and for replace-
ment. Section 5.3 lists, for various symptoms, the potentially defective units that may account for them. In
addition, the section mentions the appropriate waveforms and resistance values that should be checked for.
If trouble occurs in the printer mechanism, refer to Section 5.3.3, which specifies procedures for identifying
defective components, and the replacements, adjustments, and lubrication which should be carried out.

5.2 UNIT REPLACEMENT

This section correlates symptoms with the potentially defective units that may be causing them. The unit
numbers are listed in Table 5-1.
Name of Unit
SANPS Board
SANPSE Board
SAMA Board
SANPNL-W
Model-5710
Model-5710 (TUV)
Printhead
Printhead (TUV)
Fuse (SANPS)
(SANPSE)
Fuse
LQ-510
Table 5-1. Unit Replacement Numbers
Description
V Supply Board
120 Power
220/240 V Power Supply Board
Main Board
Control Panel Board
Printer Mechanism
Printer Mechanism
ULTSC2.0 A-N1
BET 1.25A
TROUBLESHOOTING
Unit No.
Y567202000
Y567204000
Y567201000
Y567502000
Y567590200
Y567590300
F423400000
F423500000
X502061011
X502063040
5
5-1