Epson LQ-2550 Technical Manual page 72

2.2 POWER SUPPLY CIRCUIT OPERATION (ROPS/ROPsE Board)
The DC power supplies required by the control circuits and mechanisms in this printer are included
on the power supply board. Table 2-29 shows the input ratings for this board.
Name
2.2.1 ROPS/ROPSE Board Outline
The ROPS/ROPSE board supplies various DC voltages, as shown in Table 2-30, to operate the
mechanisms and control circuits.
Since the ROPS board has almost the same structure as the ROPSE board, this section will be describe
the ROPS board.
Refer to Appendix, Figures A-49 and A-50, for the entire circuit of the ROPS/ROPSE board.
S V o l t a g e (DC)
U I
P P Y
+35 V– GH
+ 5V - GL
+ 12 V – AGN
NOTE: GH . . Ground of drive circuit, GL .,.. Ground of logic circuit, AGN . . . . Ground of analog circuit
Table 2-29. ROPS/ROPSE Board Ratings
Input Voltage [VAC]
1 0 0 - 1 2 0
2 2 0 - 2 4 0
Table 2-30. Voltages and Applications
. Printhead solenoids driving
PT solenoid driving
. LD solenoid driving
RL solenoid driving
HF motor driving
. PG motor driving
CR motor driving
PF motor driving
Fan motor driving
Logic circuit
Sensor circuits (excluding the PT sensor circuit)
Control panel
PG motor holding
CS motor holding
PF motor holding
Optional interface board
Optional Identity/Font module
Reset circuit
+35 V drive system/control system output pull ups
B u z z e r
O p t i o n a l i n t e r f a c e b o a r d
PT sensor circuit (+ 12
2 - 2 5
Fuse F1 Rating
250V, 4.OA
Applications
V only)