Power On/Off Function For The Large-Signal System - Pioneer PDP-434CMX Service Manual

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

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.
A
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
("DRF" is mentioned on the board see Fig. below).
2. Send the "DRF" RS232C command to turn the large-signal system off.
3. Send the "DRN" RS232C 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
B
slide switch.
• Although the "DRF" RS232C command is enabled during Standby, if the power is turned on then turned off, the unit will return to "DRN"
mode.
C
D
E
F
134
1
2
S5201
Drive OFF
Normal position
Fig. Drive OFF switch
PDP-504CMX/1
2
3
3
4
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