Replacing the BenQ HT1075 projector lamp
How to replace the BenQ HT1075 projector lamp
Start off with authentic
Save yourself unnecessary headaches and purchase an authentic BenQ HT1075 projector lamp. Avoid counterfeit lamps.
You’ll need model BenQ 5J.J9H05.001 replacement lamp.
Find this lamp on Amazon from the following authorized dealers:
Why go authentic? Counterfeit “compatible” lamps may appear to be a bargain but in the long run end up costing more due to their shorter lamp life. They are prone to explosions and can put your eyesight at risk. Due to their substitute toxic materials and carcinogenic parts, the few dollars you will save are not worth it. Protect your health and keep your BenQ HT1075 working at optimum levels. Go with an authentic projector lamp.
End of life warning signs
Your BenQ HT1075 projector uses the BenQ 5J.J9H05.001 replacement projector lamp. When it’s time to replace the BenQ HT1075 projector lamp you’ll see a series warnings appear on screen.

First warning: Install a new lamp for optimal performance. If the projector operates normally in Economic mode you may continue operating the
projector until the next hour lamp warning appears.
Press OK to dismiss the message.
Second Warning: Strongly recommend you to replace the lamp at this stage. The BenQ 5J.J9H05.001 lamp brightness
diminishes with use. This is normal lamp behavior. You can
replace the lamp whenever you notice that the brightness
level has significantly diminished.
Press OK to dismiss the message.
Final warning: The lamp MUST be replaced before the projector will operate normally.
Press OK to dismiss the message.
Follow these safety instructions before changing the lamp:
- Reduce the risk of electrical shock by disconnecting the power cord on the BenQ HT1075 projector.
- Reduce the risk of severe burns by allowing the projector to cool for at least 45 minutes. The projector should be cool to the touch.
Replacing the projector lamp
The projector lamp cover is found on the side of the BenQ HT1075 projector.
Loosen the screw holding the projector lamp cover in place
Lift up the projector lamp cover. Put it to one side.
NOTE: The BenQ 5J.J9H05.001 projector lamp contains mercury and should not be thrown into regular garbage. It should be properly recycled.
Loosen the screws that secures the lamp. Lift the handle so that it stands up.
Use the handle to slowly pull the lamp out of the projector. Pulling it too quickly may cause the lamp to break and scatter broken glass in the projector.

Insert the new BenQ 5J.J9H05.001 lamp into the projector taking care not to touch the actual bulb.
Tighten the screws on the new lamp Loose screw may cause a bad connection, which could result in malfunction. Do not over tighten the screw.

Replace the lamp cover on the BenQ HT1075 projector. You are know ready to reset the lamp timer.
Resetting the lamp timer
After changing the lamp, you’ll need to rese the lamp timer. Do not reset if the lamp is not new or replaced as this could cause damage.
- After the startup logo displays, resetting the lamp timer via the OSD menu.
Under the Advanced OSD menu, go to System Setup : Advanced > Reset Lamp Timer/ - Select RESET.
- • Under the Basic OSD menu, if there’s no signal connected to the projector, go to Reset Lamp
Timer and select Reset - If there are signals connected, go to Settings > Reset Lamp Timer and select Reset.
- A “Reset Successfully” message displays to notify that the lamp time has been reset to “0”
- Learn more with Top tips for extending DLP projector lamp life.


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Authentic projector lamps keep your projector working
Projector lamps operate with a lamp driver with a 5kV ignition voltage. Lamps with metal antenna in the ignition chamber are 5kV lamps. Some lamps have their antenna in the front while others have the antenna in the rear. Some projectors need high ignition voltage of 20kV so have no antenna. Generic manufacturers often don’t have the specs needed to create the proper antenna for each projector lamp and instead create lamps that faulty antenna that short circuits in the projector.
Projector lamps also work with the projector driver to bring the image to the screen. The combination of lamp and driver is unique to each projector model. Only authentic manufacturers know the specifications for each particular brands and how to use those specification to create OEM lamps. Generic lamps can never have the correct combination and installing them creates unbalanced electrical power with danger of explosions.
Almost all projector lamps have the same outer shape but the inner shape is dependent on the projector model. Most generics don’t have the correct specifications to create the correct inner shape. It creates a lamp with uneven light output distribution.
Using the screwdriver, remove the screw from the boom end cap, and then remove and set aside the boom end cap and screw.
Slide the projector mounting plate and projector off of the boom.
Using the M3 hex wrench, remove the three screws connecting the projector mounting plate to the projector, and then set aside the projector mounting plate and screws.
Using the screwdriver, remove the two screws from the lamp cover.

Place the lamp protection film that came with the new lamp module over the slot.


Replace the boom end cap. Connect the cables to the projector. Connect the power cable to a power outlet.
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