-14-■ Mechanical Disassemblies7. LAMP BALLAST UNIT REMOVAL1. Remove 4 screws A to take the Filter Holder off.2. Remove 3 screws B to take the Filter Board off.3. Remove 3 screws C to take the Inlet Board off.Filter BoardFig. 7-1A AAABBBCFilter Holder8. OPTICAL UNIT AND FAN REMOVAL1. Remove a screw A to take the Thermostat Switchupward off.2. Remove a screw B to take the Lamp Socket off.3. Remove 3 screws C to take the Fan Cover off.4. Remove 8 screws D to take the Optical Unit off.5. Remove 4 screws E to take the Fan (FAN903) off.Fig. 8-1ThermostatSwitchABC CDDLamp SocketFN903Inlet BoardFig. 7-2FanCoverCERibFig. 8-2SpacerLensDDDDDDNote: For fixing the Optical Unit, SpacerLens should be located in front ofthe rib of Cabinet Bottom.Fig. 8-3