Epson EH-TW2900 Service Manual page 98

EH-TW3500/4500/5500
2. Ground continuity check
Testing apparatus
Multimeter (with sensitivity down to 0.1 Ω)
MEASURE SW
COM
Standard/Judgment level
Should be no resistance (0.5Ω or less)
SEIKO EPSON
Disassembly and Assembly
Display
DC/AC, SW
Range selection switch
Terminals
V, ɹ, Hz
Testing procedure
1. Insulation resistance test
1. Turn on the power switch.
2. Set the range selection switch to Ω.
3. Connect the black lead wire to the COM terminal.
4. Connect the red lead wire to the V/Ω/Hz terminal.
5. Check that the resistance at (1) in the diagram below is 0.5 Ω or less.
Exposed metal part of projector
2. Illumination check
• Test conditions: Input a PC or video signal to the LCP and check the
illumination for about 5 minutes.
• Judgment : Projector should operate normally with no smoke or
fire.
98
CONFIDENTIAL
Power supply lines
Projector AC inlet
PC connector
Figure 3-43.
Revision A