Circuit Board Removal - Epson Stylus PRO 7500 Service Manual

EPSON Stylus Pro 7500

4.2.2 Circuit Board Removal

This section explains how to remove the Circuit Board (C299MAIN) and the Main Board
(C299MAIN).
4.2.2.1 Power Board Removal
Unplug the AC power cable and wait at least five minutes before
removing the power supply board to make sure there is no residual
power left in the board's condensers.
1. Remove the Rear Cover as described in "Rear Cover Removal" on page 106.
2. Remove the two cables connected to the Power Board as shown below.
Table 4-3. Power Supply Board Connectors
Connector # Pins
CN001 3
CN3 12
3. Remove the four white screws (CPS:M4x8) securing the Power Board, and then
remove the Power Board.
screws
(CPS:M4x8)
CN3
Figure 4-25. Power Supply Board Removal
Disassembly & Assembly
Color Connection Notes
white AC inlet lock type
white C299MAIN lock type
screws
(CPS:M4x8)
CN001 power Board
4.2.2.2 Removing the AC Inlets and Cooling Fan
1. Carry out "Rear Cover Removal."
2. Disconnect CN001 from the power supply board.
3. Disconnect the cooling fan harness connector from the junction connector (2-pin,
white).
4. Take out the white screw (CUPS: M4 x 8) which fastens the AC inlet, then remove the
AC inlet ground cable, and finally the toothed washer (M4).
5. Take out the white screw used to fasten the cooling fan holder (CUPS: M4 x 8) then
slide the cooling fan holder to the right side and after unhooking the hook from the
printer base, remove the cooling fan holder.
Screw (M4 x 8), Ground Cable,
Washer, Fastened together.
Power Supply
Board
CN001
Figure 4-26. Removing the Cooling Fan Holder
Disassembly Flow
Revision A
Cooling Fan
Connector
Cooling Fan
Holder
Screw (M4 x 8)
110