Power Supply Board / Power Supply Cooling Fan; Power Supply Cooling Fan Removal; Power Supply Board Removal - Epson Stylus Pro 4400 Service Manual

EPSON Stylus Pro 4400/4450/4800/4880/4880C

4.2.4.2 Power Supply Board / Power Supply Cooling Fan

When removing the "Power Supply Board", wait 5 minutes
W A R N I N G
after unplugging the AC power cord before starting work to
allow discharge of residual charge in the electrolytic
capacitors.
For your safety, never touch the primary smoothing
capacitor (C6). Do not place the "Power Supply Board"
(solder side) directly on a conductive surface.
1. Remove the "PCB Unit".(Refer to "4.2.4.1 C593 MAIN Board" (p226).)
2. Disconnect the following connectors/harnesses from the "Power Supply
Board".
Table 4-5. Connectors Connected to Power Supply Board
Connector Number
Color
No. of Pins
CN1 White 2
CN2 White 14
3. Disconnect the connectors of the "Power Supply Cooling Fan" from the
"C593 MAIN Board". (Refer to "4.2.4.1 C593 MAIN Board" (p226).)
4. Remove the two screws that secure the "Power Supply Cooling Fan", and
remove the "Power Supply Cooling Fan".
C.B.S. 3x18: 2 pcs.
5. Remove the five screws securing the "Power Supply Board" and remove
the "Power Supply Board".
C.B.S. 3x8: 5 pcs.
Disassembly & Assembly
Connection Socket
AC Inlet
C593 MAIN Board (CN1)
Disassembly Procedures
C.B.S. 3x18
Figure 4-39. Power Supply Cooling Fan Removal
C.B.S. 3x8
Figure 4-40. Power Supply Board Removal
Revision C
Connectors
C.B.S. 3x8
233