Epson LQ 300 - Removing the MAIN and PSB;PSE Board Assemblies

LC?-300 Service Manual
Disassembly and Assembly
3.2.3 Removing the MAIN and PSB/PSE Board Assemblies
1.
2.
3.
4.
5.
Remove the printer cover assembly, edge guide assembly, ribbon cartridge, tractor assembly,
platen knob, and optional color upgrade kit.
Remove the upper housing assembly (see Section 3.2.2).
Disconnect 4 flexible flat cables (FFCS) and 7 connectors from the MAIN and PSB/PSE board
assemblies.
Remove 4 CBB (M3 x 8) screws attaching the shield plate to the MAIN and PSB/PSE board
assemblies, the CBB (M3 x 8) screw attaching the CS board, and the CB(0) (M4 x 8) screw
attaching the ground wire of the power cable.
Disengage the shield plate and W and PSB/PSE board assemblies from the grounding
plate.
CBB(M3X8)
MA
M4x8)
round Wire
CBB(
er Cable
Grounding Plate
Figure 3-5. Removing
PSB/PSE Board AssemblY
/
Shield Plate
the Shield Plate
Rev.A
3-7