EH-TW3500/4500/5500
Troubleshooting
CONFIDENTIAL
SEIKO EPSON
18
Revision A
2.3 Exterior Check
When repairing this product, carry out exterior check of the target parts/units as
necessary.
Check Items
Target part
Check item
Upper Case
Any damage/deformation/cracking due to external
forces?
Is it fixed to IF Case and Lower Case correctly?
IF Case
Any damage/deformation/cracking due to external
forces?
Is it fixed to Upper Case and MA Board correctly?
SW1 Board
Is it fixed to Upper Case correctly?
Any stuck buttons?
Does Buttons work smoothly?
SW2 Board
Is it fixed to Side Case R correctly?
Any stuck buttons?
Does Buttons work smoothly?
Lamp Cover
Is it fixed to Upper Case correctly?
Any damage on the latch to operate the Lamp Cover
Switch? (Check for it with the cover removed.)
Projection Lens
Does Focus Ring work smoothly?
Does Zoom Ring work smoothly?
Any dirt/scratches on the projection lens?
Horizontal Lens Adjustment Dial
Does each lens adjustment dial work smoothly?
Vertical Lens Adjustment Dial
Lower Case
Any damage/deformation/cracking due to external
forces?
Any foreign object/dirt on the filter cover or the
vents?
Any foreign object/dirt on IR receivers?
Foot
Does Front Foot work smoothly to adjust height?
Any Foot Rubber detached?
AC Inlet
Any deformation/discoloration on the connector/
terminals?
Any damage on the socket?
Interfaces
Any deformation/discoloration on the connector/
terminals?
Any foreign objects on the connectors/terminals?
Air Filter
Is it fixed correctly?
Any dirt on the filter? (check for it with the filter
removed.)
Any dirt/foreign materials on the fan inside the
filter?
Lamp
Any burn/deformation on the frame?
Any deformation/discoloration on the connector?
Any dirt on the glass surface?
Target part
Check item
Summary of Contents for DREAMIO EH-TW2900
Page 1: ...EH TW2900 3500 4400 4500 5500 Multimedia Projector SERVICE MANUAL CONFIDENTIAL ...
Page 9: ...CONFIDENTIAL C H A P T E R 1 PRODUCTDESCRIPTION ...
Page 16: ...CONFIDENTIAL C H A P T E R 2 TROUBLESHOOTING ...
Page 46: ...CONFIDENTIAL C H A P T E R 3 DISASSEMBLYANDASSEMBLY ...