Read Sony DCR-TRV900 Service Manual online
8
1-4. Power Reset Description
The HI controller is backed up by the lithium battery. Various data (clock data and
others) are backed up by the backup battery. When the main power of the DCR-
TRV900 is turned off, the HI controller is reset by the reset IC. Then the HI
controller resets the mechanism controller and the camera controller. The mecha-
nism controller that is in charge of the system reset, performs the following resets.
1 VTR reset
2 LIP reset
3 ADA reset
4 EEP reset
2 LIP reset
3 ADA reset
4 EEP reset
The camera controller resets the entire camera system.
When these resets are completed, the mechanism deck and the camera block are
initialized. Then the DCR-TRV900 enters the standby state.
Power supplies in use
The following three power supply systems are used.
(1) 2 V system (Operating range 1.8 V to 2.2 V)
→
Used at 1.9 V
(2) 3 V system (Operating range 2.7 V to 3.3 V)
→
Used at 2.8 V
(3) 5 V system (Operating range 4.5 V to 5.5 V)
→
Used at 4.6 V
POWER ON
System reset
Reset IC
HI controller
E
E
P
E
P
R
E
S
E
E
S
E
T
A
D
A
D
A
R
E
S
E
E
S
E
T
L
I
P
R
E
S
E
E
S
E
T
V
T
R
R
E
S
E
E
S
E
T
Camera reset
Camera controller
Mechanism controller
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