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Removing and replacing the power supply
The power supply (LP920, IOpen 920: 505-0077-xx; LP925, LP930: 505-0077-3x) is located adjacent to
the optical engine at the side of the projector beneath the I/O ports. It fastens to the bottom case and
converts the 100-240 VAC supply voltage to various low voltage DC levels required internally by the
projector. The power supply also includes a cooling fan and an internal lamp ballast to strike and operate
the lamp.
DANGER Do not attempt to measure the voltage from the internal lamp ballast when the lamp strikes. The
extremely high voltage is capable of ruining test instruments as well as causing personal injury.
1
Remove the following items:
Front bezel (see page 24)
Rear bezel (see page 43)
Top case (see page 47)
Exhaust fan assembly (see page 18)
Lamp module (see page 29)
ECA stack (see page 13)
2
Use a T-10 Torx driver to remove the two M3x8 screws that fasten the lamp connector shield to
the top of the power supply. Then remove the shield.
LP900 Series Service Manual
38
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