Power Supply Circuit Operation - Epson LQ-1050 Technical Manual

REV.-A

2.2 POWER SUPPLY CIRCUIT OPERATION

board)
The DC voltages required to operate the mechanisms and control circuits are supplied from the supply
board in this unit. There are two kinds of power supply boards, the
V operation and the
Since the board has almost the same structure as the
the board.
Name
2.2.1
The and
and operate the mechanisms.
* Refer to Figure A-34 and Figure A-35 in the Appendix for the entire circuit of the
boards.
Power Voltage (DC)
- Gp
-
V x -
NOTE: The voltage Vx is generated on the
board for 220 V or 240 V operation. Refer to Table 2-7.
Table 2-7. Power Supply Voltages
Input AC
100 or 120
220 or 240
Boards
boards generate the DC voltages shown in Table 2-8 to supply the circuits
Table 2-8. Voltages and Applications
I
(1) Carriage motor drive
(2) Paper feed motor drive
(3) Printhead solenoid drive
(4) Plunger drive
(5) Fan motor drive
(1) board logic circuit power
(2) Power for various sensors
(3) Indicator lamps on the control panel power
(4) Optional interface board power
(5) Paper feed motor holding
(6) Plunger holding
(7) Optional cartridge power
Reset
(1) circuit
(2) H 1 to H24 of
125V, 3. 15A
250V, T2A
Application
3A
board. Refer to Section 2.3.1.1.
2-10
board for 100 V or 120
board, this section will describe
Rated Fuse F1
and