XV-HTD540
108
1
2
3
4
1
2
3
4
C
D
F
A
B
E
7.1.10 POWER ON SEQUENCE
Reset Start
Demonstration mode ?
Yes : Power ON
Yes
No
No
Microcomputer
initialization
Model
identification
Standby setting
• It starts when the XRESET terminal (Pin 8) is "H" level.
• The inputs to Pins 15 and 16 are inspected and the model identification is performed.
Demonstration mode
permission
Demonstration mode
System power supply on
DVD microcomputer start-up
Relay release
Demonstration mode
or Normal power ON mode
• The level of the POWER terminal (Pin 91) is "H".
• Only in DVD function, the level of the DVD RESET terminal (Pin 93) is "H".
• The speaker relay is turned on about five seconds after the power is turned on.
• The level at the RELAY ON/OFF terminal (Pins 34 and 35) are "H."
• The conditions are different depending on whether the headphones are connected
via the Headphones jack, or on the DSP mode.
• If no pulse is input to the AC terminal (Pin 4) for about 60 msec when the microcomputer is in Memory Backup mode,
it will not do any processing.
• The unit will recover from Memory Backup mode if a reset command is input to the XRESET terminal (Pin 8).
• The system mute is released about six seconds after the power is turned on.
The level of the SYSMUTE terminal (Pin 94) is "H".
• Muting is not released in the following cases.
• When the main volume is 0.
• When the LINE 2 function digital input signal is not locked,
or when the DSP MUTE terminal (Pin 87) is in error.
• Whether Demonstration mode is entered or not can be
determined by inspecting the backup data.
• The default setting is "Demonstration mode OK."
Standby
Initialization routine
Main loop processing
Microcomputer IC (PDC112A) (AF Assy : IC5501)
