Power On Sequence - Pioneer XR-A9800D Service Manual

7.1.5 POWER ON SEQUENCE

Reset Start
Initialization routine
Microcomputer
initialization
Distinction of
the model and destination
DEMO mode
permisshion
Yes
DEMO mode
setting
Main loop process
Power ON
or DEMO ?
Yes : Power ON
System
power ON
DECK mechanism
initialization
DVD controller
rise up
Release the
relay
Release the
mute
Note : The microcomputer enter the memory backup mode if the pulse is not inputted to pin 26 (AC) for about 60 msec.
While the memory is backupped, all the process is not done.
It is revert from the memory backup mode when there is rising edge (↑) input at the pin 11 (XRESET).
Start when pin 11 (XRESET) becomes "H".
Destinguish it by the input condition of pins 1 and 2.
(Refer to the schematic diagram.)
No
Standby setting
No
Standby
Pin 87 (POWER) : "H"
Only at function is DVD. Pin 3 (DVD RESET) : "H"
Turn the speaker relay to ON after about four seconds after the power is turned ON.
Pin 9, 10 (RELAY ON/OFF) : "H"
Release the system mute after about 4.1 seconds after the power is turned ON.
Pin 88 (LINE MUTE) : "L"
∗ However, mute is not released at the following condition.
• When main volume is 0.
• When function is TAPE and DECK mechanism is stopped.
Judge whether it perform the demonstration by
the backup data.
The setting in shipping is demonstration ON.
XR-A9800D
95