Pioneer M-AX10 Service Manual page 48

M-AX10
4.2 INPUT switching
INDICATOR port processing and switching process start 30 ms
after INPUT key input [port 39 (INPUT)(Pin39): "L"].
No muting process is performed.
INPUT key is pressed.
EEPROM writing
LED processing
Switching processing
Silent processing
Fig.3 Timing chart when INPUT key is pressed
4.3 ATT.HOLD Key Processing
Upon ATT.HOLD key input, the specified current volume value
is held.
While ATT.HOLD is ON, the volume level stays at the held value
even if the volume control is operated.
In Muting mode (when the power is turned on or ATT.
THROUGH is switched from ON to OFF), the ATT.HOLD key is
disabled.
ATT. HOLD key is pressed.
EEPROM writing
(OFF → ON)
EEPROM writing
(ON → OFF)
VOL. transfer
(ON → OFF)
LED processing
4
HOLD processing
(OFF → ON)
SILENT
(OFF → ON)
SILENT
(ON → OFF)
Fig.4 Timing chart when ATT. HOLD key is pressed
48
1
2
40 msec
3
40 msec
4
1
typ. 8 msec
2
typ. 1 msec
3
typ. 10 msec
typ. 0 msec
5
6
6'
4.4 ILL Key Processing
Each press of the key cycles Bright, Dark, Lamp Off, and LED
Off.
ILL key is pressed
1
Port processing
SILENT processing
3
Fig.5 Timing chart when ILL key is pressed
4.5 VOL Key Processing
VOL operation
VOL input valid
Data transfer
to DAC
SILENT processing
4
5 sec
Fig.6 Timing chart when volume is input
4.6 Invalid Key Input
An invalid key is pressed.
SILENT processing
1
5 sec
Fig.7 Timing chart when an invalid key is pressed
2
1
typ. 15 msec
2
typ. 16 msec
3