2-7
EMP-TW1000
SEIKO EPSON Revision:A
2.2.1 Lamp Unit
The Lamp Unit is comprised of the Lamp (UHE-170W) and Ballast Power Supply Connector.
The Ballast Power Supply Connector is used to supply the AC voltage from the ballast unit for
driving the lamp. The lead wires are connected to the lamp.
The lamp is fastened to the bottom of the projector body with 2 screws. The lamp is a
consumable part, and is to be replaced as the luminance of the Lamp Unit declines over time as
the lamp is used. Maximum luminance is obtained when a new lamp is first installed. After
approximately 1700 hours at high brightness or 3000 hours at low brightness, the luminance
will drop by approximately 50%.
Figure 2-6.
The Lamp may be replaced at any time. Replace the Lamp Unit before the full 1700-hour
period (at high brightness) or 3000-hour period (at low brightness) has been reached if it seems
that the luminance of the lamp is unacceptable during actual use.
The cumulative operating time for the Lamp Unit is stored in IC503 on the MA board. When
the lamp is replaced, the lamp timer should be reset using the Reset Lamp Timer function in
the Reset menu. Check the Lamp Time in the [Info] menu to confirm that the timer has been
correctly reset.
Figure 2-7. Lamp Unit Control Circuits
• The EMP-TW1000 has a sleep mode function that will automatically turn off the lamp if no
new signals are input for a continuous period (Default is 30 minutes, the time can be set by
the minute).
Ballast Power Supply Connector
MA Board
IC 503
Power Supply ON/OFF
Powet Cut Detection
Fan Control
1501
4000
Blown Lamp Detection
Ballast Output ON/OFF
Lamp Unit Ballast Unit Power Supply Unit
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