4 Troubleshooting and Verifying the Repair
This chapter provides technicians with electronic background how to maintain the product.
Moreover, you can get the appropriate operation to solve some complicated probl ems of
component repairing and professional problems.
4.1 Troubleshooting
Warning
Do not directly look into the lens to avoid eyesight damages.
The projector is equipped with ventilation holes (intake) and ventilation holes (exhaust). Do
not block or place anything near these slots, or internal heat build -up may occur, causing
picture degradation or damage to the projector.
Confirm Software and hardware
(1) Confirm FW version is the latest.
How to enter Engineering Mode?
-Open the Main menu and move the color bar to “Information” item, and then move down
the color bar to “Equivalent Lamp Hours” item, press the direction key following the actions
below:
Right once, left twice, right once; then you will enter the Engineering Mode. )
Note: This FW version is just for reference.
Confidential - Do Not Copy
ViewSonic Corporation
Pro8400
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