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(2) When operating using the remote commander
Fig. 6-3. shows the connection between the operation buttons on the remote commander and the system controller (IC801)
while Table 6-2. shows the dividing voltage input to Pin 7 [RMC KEY] of the system controller when a remote commander
button is pressed.
When power supply to each part starts after wake-up, the two switches inside the DC-DC converter turn ON, and the
dividing voltage obtained by R905 (150 kΩ) and R838 (10 kΩ) is input to Pin 7 [RMC KEY] of the system controller. When
a remote commander button is pressed in this state, the matrix resistor corresponding to that button and a dividing voltage and
R905 are connected in parallel form, and the voltage shown in Table 6-2. is input to Pin 7 of the system controller.
2.8[V]
VC
IC901
DC-DC CONVERTER
10
36
R905
150k
XWK3
33
R838
10k
2
1
Fig. 6-3. Key Input Circuit of Remote Commander
HOLD
1k
VOL+
1.5k
VOL-
1.3k
STOP
2k
PAUSE
1.5k
IC801
PLAY
SYSTEM CONTROLLER
2.6k
REW
RMC KEY
7
Table 6-2. Key Input Voltage During Operations of
Remote Commander (Reference Values)
Operation Buttons of
Remote Commander
VOL+
VOL–
STOP
PAUSE
PLAY (FF)
REW
When nothing is pressed
— 29 —
Pin 7 of IC801
1.4V
1.5V
1.65V
1.8V
2.0V
2.5V
0.2V
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