5. Steps to upgrade to 4K
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6.3 Battery Replacement Method for ICP Board
The coin battery (Panasonic BR2330) mounted on the ICP board provides electrical power for
maintaining tamper detection, time, and date information while the power to the projector is off.
If the battery voltage drops, the tamper detection circuit is activated and the security key is
erased. Once the security key has been erased, the projector requires repair at the factory.
Warning
Before replacing the battery, thoroughly read the content of this
section, and perform the work by following the procedure correctly. If
you make a mistake while fitting the new battery, there is a risk of
explosion and damaging the projector.
When replacing the battery, use the same model of battery.
Dispose of the used battery by following the directions of your local
government agency.
Note
Make sure that the AC power supply is turned off while removing the ICP board from the
projector.
Always adhere to the instructions given in this section.
Although data is maintained while the battery is being replaced for approximately 3 hours by
the sub-battery built into the ICP board (when the sub-battery is fully charged), please
replace the battery quickly. To ensure that the sub-battery is fully charged, turn the
projector power supply on for 30 minutes or more before replacing the battery.
If you remove the front cover, side cover, or lens side cover, the following error message is
displayed on the LCD screen of the main unit operating panel by the tamper detection circuit
of the signal input board.
“Tamper Fail”, “Service Door Open”
Also, if you remove the closing panel or device from slot, the following error message is
displayed on the LCD screen of the main unit operating panel by the tamper detection circuit.
Furthermore, since the marriage is cleared, re-marriage is necessary.
“Marriage Tamper Fail”, “Physical Marriage Tamper”, “Marriage Not Active”
Encrypted contents cannot be displayed while an error message is being displayed. Refer to
“3.2 Recovering from Tamper Errors” (page 106) for the recovery procedure.
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