C293 Psb/Pse Board Removal - Epson LQ-570e Service Manual

EPSON LQ-570e/LQ-580

4.2.6 C293 PSB/PSE Board Removal

1. Remove the paper guide assembly, top cover, front cover, paper eject cover, knob and
tractor unit. (See 4.2.1 "Pre-disassembly Procedures".)
2. Remove the upper housing. (See 4.2.4 "Upper Housing Assembly Removal".)
3. Remove 7 CBS (3x4, F/ZN) screws and 2 CBP-Tight (3x12, F/ZN) screws securing the
shield plate to the rear frame and power supply board assembly and remove the shield
plate. (See 4.2.5 "C293 MAIN Board Removal".)
4. Disconnect the harness from the connector CN3 to the C293 MAIN board.
5. Disconnect the power cable from the connector CN1 on the C293 PSB/PSE board.
6. Remove 2 CBP-Tight (3x12, F/ZN) screws and 1 RIVET B-Tight (3x12, F/ZN)
securing the C293 PSB/PSE board to the lower housing and remove the C293 PSB/
PSE board.
n Before disassembling, assembling or adjusting the printer,
W A R N I N G
disconnect the power supply cable from the AC power socket.
Failure to do it cause personal injury.
n Do not touch the heat sink attached to the switching FET (Q1) on
the power supply board, just after power off as it may be very
hot.
n Never touch the heat sink attaches to the switching FET (Q1)
while at AC power cable is connected to the AC outlet, as it is not
electrically isolated.
Disassembly and Assembly
Figure 4-11. C293 PSB/PSE Board Removal
Disassembly and Assembly
2 CBP-Tight (3x12, F/ZN) Screws
1-RIVET B-Tight (3x12, F/ZN) Screw
Revision C
81