Power On/Off Function For The Large-Signal System - Pioneer PDP-5000EX Service Manual

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10.2 POWER ON/OFF FUNCTION FOR THE LARGE-SIGNAL SYSTEM

Function:
To prevent a power-down from being generated, operation of only the digital-signal processing is enabled, and power is not
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supplied to the panel driving system (large-signal system).
Usage:
1. In a case where a check is required of signals' being correctly output to the driving systems during a repair, etc.
2. In a case where diagnosis is required for judging whether the power-down occurred in the large-signal system or small-
signal system.
Procedures:
1. Set the slider switch on the 50FHD X DRIVE Assy (see Fig) to the far right position.
2. Issue the "DRV S00" RS-232C command. (To cancel, use the "DRV S01" command.)
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For details on how to issue an RS-232C command during Standby mode, see "About RS-232C commands during
Standby mode," 9.1.1 DESCRIPTION OF RS-232C COMMAND."
3. Proceed as follows, using the remote control unit for servicing:
Press any key other than the Standby key during Standby mode.
(This is because the main microcomputer does not accept the first keypress.)
(Within 10 seconds)
Press the DRIVE ON/OFF key.
(Within 10 seconds)
Press the Standby key to start up the unit.
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Notes:
• When the power to the large-signal system is off, as the PD signal is muted, power-downs other than PS_PD are not
activated.
• Although the "DRV S00/S01" RS-232C commands are valid during Standby mode, once the main power is turned off, the
unit will return to "DRV S01" (for canceling the function). Some special procedures are required.
See "9.1.1 DESCRIPTION OF RS-232C COMMAND."
• To turn the drive off using the remote control unit for servicing, press the DRIVE ON/OFF key twice within 10 seconds,
then within 10 seconds press the POWER key to turn the unit on.
• The remote control unit for servicing only turns off the drive but cannot turn it on.
• It is possible to turn the drive off (either by using the remote control unit for servicing or by issuing the appropriate
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RS-232C command) while the unit has a picture displayed. However, as it may damage the unit, turn the drive off during
Standby mode activated using the remote control unit. (A power-down may occur.)
• NEVER turn on the large signal system by using the Drive OFF switch while the power is ON, as doing so would damage
the unit.
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Fig. Drive OFF Position
PDP-5000EX
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Drive OFF switch
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