Unit Replacement - Epson LQ-2550 Technical Manual

REV.-A

5.2 UNIT REPLACEMENT

The unit replacement is based on system analysis. According to the particular symptom found by the
multimeter, the units listed in Table 5-3 need to be replaced, and Table 5-4 shows sympton and
reference pages.
Unit
Fuse (Fl)
250V 4.OA (for ROPSE board)
2 2 0 - 240V AC
Lithium battery
Battery Unit
Control board
Fan Unit Fan motor
Panel Unit ROPNL-W board
# 8 C 2 Case open sensor
Model-5560 Printer mechanism (exclude printhead)
24-pin dot head
Color select unit
1. Before starting any unit replacement, confirm that all connectors are connected firmly, and that
no cables are cut.
2. When repairing the printer by unit replacement, be sure to reattach the upper case and reconnect
connector CN21 to the ROMA board. (If CN2 1 is disconnected, the LCD on the printer continues
to display "CASE OPEN.")
Table 5-3. Replacement Unit Numbers
125V 6.3A (for ROPS board)
1 0 0 - 120V AC
Description
W A R N I N G S
5-6
Unit No.
X50206 1070
X 5 0 2 0 6 3 0 6 0
Y 4 5 6 2 0 2 0 0 0
Y 4 5 6 2 0 3 0 0 0
Y 4 5 4 5 0 4 0 0 0
Y456201 200
Y 4 5 6 5 0 3 0 0 0
Y45650 1000
Y 4 5 6 3 0 5 0 0 0
Y 4 5 6 5 9 0 0 0 0
F4 18000000
F344902000