Epson DREAMIO EH-TW2900, Service Manual

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EH-TW3500/4500/5500 Disassembly and Assembly CONFIDENTIAL
SEIKO EPSON 98 Revision A
2. Ground continuity check
„
Testing apparatus
Multimeter (with sensitivity down to 0.1
Ω
)
„
Standard/Judgment level
Should be no resistance (0.5
Ω
or less)
„
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.
Figure 3-43.
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.
Display
MEASURE SW
DC/AC, SW
Range selection switch
Terminals
V, ɹ, Hz
COM
Power supply lines
Exposed metal part of projector
PC connector
Projector AC inlet