Epson EH-TW2900 Service Manual page 97

EH-TW3500/4500/5500
Standard
Insulation resistance should be 10 MΩ or more.
Testing procedure
1. Insulation resistance test
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.
Because high voltage (500 V) is present, do not touch the probe during testing.
4. Connect the crocodile clip of the black lead wire to "c" of the PC
connector. (refer to Fig. 3-42)
5. Insert the probe of the red lead wire into "a".
6. Set the measure switch to LOCK, and wait for one minute.
7. Measure the insulation resistance between "a" and "c" (1) after one
minute.
8. Measure the insulation resistance between "b" and "c" (2) in the same
way as for (1).
SEIKO EPSON
Disassembly and Assembly
Exposed metal part of the device
97
Power supply lines
a
b
Projector AC inlet
(1)
(2)
C
PC connector
Figure 3-42.
CONFIDENTIAL
Revision A