Main System Block; Vc-1045 Board - Sony HXR-NX80 Service Manual
Solid-state memory camcorder
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5-13.
Main System Block
5-13-1.
VC-1045 Board
The VC-1045 board contains all main system component devices.
Power supply control/RTC block
This board collects the following two power input channels and converts input power to voltages required for each DD
converter.
• Two input power channels
AC adapter (AC-L200 D)
Battery (V battery)
he 2-channel input power voltages are automatically switched by the power management IC (IC5651) according to the
following conditions, and the selected voltage is used.
• When the AC adapter and the battery are simultaneously detected, the AC adapter is used preferentially.
• The AC adapter and the battery are switched without power interruption.
The system power IC (IC5100) that incorporates a 6-channel switching regulator controllable through serial
communication and a 2-channel LDO generates seven output voltages (1.0 V, 1.2 V, 1.8 V, 3.15 V, 3.3 V, 5 V, and HB_
1.8 V).
The peripheral IC (IC5200) generates four output voltages (LANC_DC, EVER_3V, HDMI_5V, and MSX_3.3V).
The power controller (IC5700) controls switching of the AC adapter and the battery by IC5651 and the power-up/power-
down sequence by IC5100.
The power controller (IC5700) also has a Real Time Clock function. When neither AC adapter nor battery is connected,
the clock is counted with the reference clock of the 32.768 kHz oscillation circuit (X5700) by the power supply from
the backup rechargeable lithium coin battery.
The PWM control-type boost DC/DC converter (IC0103) controlled by the system processor (IC6000) generates a
voltage for the LCD backlight.
The buck-boost converter (IC0102) generates a voltage of 8 V for the multi-interface shoe accessory.
When the Ethernet conversion adapter CBK-NA1R is connected, the camera body functions as a USB host and supplies
the 5 V voltage generated by IC5100 to the Ethernet conversion adapter CBK-NA1R through the bus power switch
(IC5630).
The step-down converter (IC0603, IC0602) generates voltages 2 V and 3.4 V to be supplied to the SH-1020 board.
The step-down converter (IC0604) generates a voltage of 1.1 V to be supplied to the CM-1016 board. The step-down
converter (IC5050) for VID control generates a core voltage (0.9V_ASV) for the system processor (IC6000).
The power LDO (IC0815, IC0816) generates a core voltage (0.9V_NOTASV) for the system processor (IC6000) and
an IO voltage (0.9V_NOTASV).
The power LDO (IC0813) generates an analog macro voltage (1.8 V) for the system processor (IC6000). This power
voltage is also used as a voltage for the master clock (X6000: 24 MHz, X6360: 72 MHz).
The step-down converter (IC0811) generates a voltage of 1.2 V for the DRAM that is PoP-mounted on the system
processor (IC6000).
The load switch (IC0701) functions as a power switch for memory card in the memory card slot A and for the SDIO
macro of the system processor (IC6000). When the UHS-I memory card is in use, the SDIO macro power of the system
processor (IC6000) changes to 1.8 V supplied from the power LDO (IC0702).
The load switch (IC0705) functions as a power switch for memory card in the memory card slot B and for the SDIO
macro of the system processor (IC6000). When the UHS-I memory card is in use, the SDIO macro power of the system
processor (IC6000) changes to 1.8 V supplied from the power LDO (IC0706).
HXR-NX80/HXR-MC88
5-14
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