4-5
EMP-822/EMP-83/EMP-X5/EMP-S5
SEIKO EPSON
Revision:A
4. Method to check the Safety Control Points
Insulation resistance test
Testing procedure
Carry out testing in the order given below.
Testing methods
•
Testing apparatus: Insulation ohmmeter (Rating: 500 V/100 M
Ω
)
•
Insulation ohmmeter settings
Check Item
Tool
Standard
Insulation resistance check
Insulation ohmmeter
Insulation resistance
should be 10 M
Ω
or more.
Repair
End
Insulation resistance test
Safety inspections
Illumination check
a
b
Projector AC inlet
PC connector
(1)
(2)
1. Set the range selection switch to 500 V.
2. Connect the black lead wire to the ground terminal.
3. Connect the red lead wire to the line terminal.
4. Connect the black lead wire (crocodile clip) to c in
order to measure the insulation resistance (1) (between
a and c) in the diagram below.
5. Next, insert the probe of the red lead wire into a.
6. Set the measure switch to LOCK, and then measure the
insulation resistance after 1 minute.
7. Check that the insulation resistance after 1 minute is
10 M
Ω
or more.
8. Next, measure the insulation resistance at (2) (between
b and c) in the diagram below in the same way as for
(1).
9. Check that the insulation resistance at (2) after 1 minute
is 10 M
Ω
or more.
Ground terminal
Line terminal
Display
Measure switch
Range selection
switch
!
Caution
Because high voltage (500 V) is present,
do not touch the probe during testing.
Exposed metal part of projector
c
Power supply lines
Содержание EMP 822
Страница 1: ...Service Manual Data Projector EMP 822 EMP 83 EMP X5 EMP S5 ...
Страница 9: ...Chapter 1 Product Specifications ...
Страница 20: ...Chapter 2 Theory of Operation ...
Страница 27: ...Chapter 3 Troubleshooting ...
Страница 50: ...Chapter 4 Disassembly Assembly ...
Страница 102: ...Chapter 5 Appendix ...