Operation When The Media Reciver Is Not Connected; Temperature-Compensation Function Of The Drive-System Voltage - Pioneer PDP-504PE Service Manual

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7.1.6 OPERATION WHEN THE MEDIA RECIVER IS NOT CONNECTED

As the connection conditions of the system cables (MDR cable, DVI cable) are usually detected, if no connection, such as cable
disconnection, is detected, a warning indication (alternate flashing of the red and green areas) is displayed on the mask screen, and the red
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and green LEDs flash alternately. Then after about 30 seconds, the power is automatically turned off.
Note: Only when the power is turned on again, a warning indication on the mask screen restarts. During standby, only the red and green
LEDs flash alternately.
GREEN GREEN GREEN
B
C
To operate the panel without the Media Receiver, there are the following two ways:
1. Operation-without-the-Media-Receiver mode
Input the "SCN" RS232C command. The status of the LEDs changes to that in normal operation mode.
Note: Turning the AC switch to OFF then ON also maintains this mode. However, once the unit is connected with the Media Receiver using
the MDR cable, this mode is automatically canceled.
2. DVI mode
Turn the unit on while PC and DVI SG signals are being input with only the DVI connecter connected. After a warning is displayed for
about 5 seconds, the unit is ready to display the screen of the input signal. (Green LED lit)
Notes: • Although the output from XGA (43 inch) and WXGA (50 inch) can be input to the unit, this is not a mode open to general users.
D
(With some signals, errors such as power-down may occur.)
• If a DE signal from the SG is not input during DVI mode, the green LED flashes (at intervals of 2 sec) for about 8 seconds, then the
unit shifts to Power Management mode (the green LED lights).

7.1.7 TEMPERATURE-COMPENSATION FUNCTION OF THE DRIVE-SYSTEM VOLTAGE

Function: To control the DRIVE-system voltage according to the temperature (Temperature compensation functions such that the voltage
is lowered on the lower-temperature side and the voltage becomes higher on the higher-temperature side.)
Purpose: For improving the yield by compensating for the temperature characteristics of the panel
Note: Temperature compensation is performed only for the VSUS voltage, and not for the VOFS voltage. This compensation is
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controlled by the software.
F
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Alternate flashing at intervals of about 1 second
PDP-504PU
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RED RED RED
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