PDP-5050SX
138
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7.1.5 POWER ON/OFF FUNCTION FOR THE LARGE-SIGNAL SYSTEM
Drive OFF
Normal position
S5201
S5201
Fig. Drive OFF switch
Function:
Only the power for the low voltage lines (16 V, 12 V, and 6.5 V) is on, and the power for the high voltage lines (VSUS, VADR)
is off.
Usage:
1. Use when only an operational check for the low voltage lines is required, such as when making repairs.
2. Use when rewriting of a program for each microcomputer is required.
Methods:
1 Set the slide switch (S5201) on the DIGITAL VIDEO Assy to its upper position
(See Fig. below).
2. Send the "DRF" RS-232C command to turn the large-signal system off.
3. Send the "DRN" RS-232C command to turn the large-signal system on.
Notes:
• As the unit enters Power-Down and Muting On mode when Methods 1 and 2 are performed, and power-downs other than those caused by
the power (PS_PD) and DC-DC-converter (DIGITAL_DC-DC) circuits are not activated.
• If the slide switch is set from OFF to ON while the power is on, a power-down will occur. Be sure to turn the power off before switching the
slide switch.
• When using the RS-232C commands, as with the slide switch, do not use the "DRN" command (DRIVE ON) while the power is on, although
doing so will not cause a power-down.
• Although the "DRF" RS-232C command is enabled during Standby, if the power is turned on then turned off, the unit will return to "DRN"
mode.
