Panasonic BB-HCM547CE Service Manual ▷ View online
17
BB-HCM547CE
4.6.
Pan and Tilt Motor Control Circuit
PAN drive motor and TILT drive motor are driven under the control from the CPU (IC101).
[PAN drive control]
PAN drive control circuit is mounted on the Main board.
For the PAN drive control, the CPU (IC101) generates a variety of pulses that are applied to the PAN motor diver (IC608) to con-
trol the speed and direction of the rotation of the motor. In addition, the reference voltage is exchanged and it is generated the
PAN motor diver (IC608) by CPU(IC101) output port and the current to the PAN motor is used to control the torque of the PAN
motor and to the W1-2 control drive of the motor.
The W1-2 control drive is the method to increase the rotational resolution of the motor, and with this method of the W1-2 control
drive the accuracy of 1.875
For the PAN drive control, the CPU (IC101) generates a variety of pulses that are applied to the PAN motor diver (IC608) to con-
trol the speed and direction of the rotation of the motor. In addition, the reference voltage is exchanged and it is generated the
PAN motor diver (IC608) by CPU(IC101) output port and the current to the PAN motor is used to control the torque of the PAN
motor and to the W1-2 control drive of the motor.
The W1-2 control drive is the method to increase the rotational resolution of the motor, and with this method of the W1-2 control
drive the accuracy of 1.875
° (7.5°/4) has been achieved for the PAN motor minimum step angle of 7.5°. The motor control signal
from the motor driver (IC608) for the PAN drive is applied to the PAN drive motor via the 4-pin connector (CN653)
In the position control, the home position for the PAN control is detected by the PAN sensor (IC606; photo coupler) when the
power is turned on, and then the position is open-loop controlled by the software. In order to remove variations among products,
the output from the PAN sensor (IC606) is input into the comparator (IC607) and the output (PAN_S) from the comparator is
detected in the CPU (IC101).
The motor drive power supply (VM voltage) for the PAN drive motor driver (IC608) is +12 V that is supplied from the IO board.
In the position control, the home position for the PAN control is detected by the PAN sensor (IC606; photo coupler) when the
power is turned on, and then the position is open-loop controlled by the software. In order to remove variations among products,
the output from the PAN sensor (IC606) is input into the comparator (IC607) and the output (PAN_S) from the comparator is
detected in the CPU (IC101).
The motor drive power supply (VM voltage) for the PAN drive motor driver (IC608) is +12 V that is supplied from the IO board.
[TILT drive control]
The TILT motor driver (IC403) and TILT sensor (IC401) which are The TILT drive control circuit are mounted on the TILT board.
For the TILT drive control, the CPU (IC101) on the Main board generates a variety of pulses that are applied to the TILT motor
driver (IC403) to control the speed and direction of the rotation of the motor. Since the TILT drive control does not require such
rotational resolution as required in the PAN drive control, but the “W1-2” control method is used. In the TILT drive unit, the accu-
racy of 1.875
For the TILT drive control, the CPU (IC101) on the Main board generates a variety of pulses that are applied to the TILT motor
driver (IC403) to control the speed and direction of the rotation of the motor. Since the TILT drive control does not require such
rotational resolution as required in the PAN drive control, but the “W1-2” control method is used. In the TILT drive unit, the accu-
racy of 1.875
° (7.5°/4) has been achieved for the TILT motor minimum step angle of 7.5°. The motor control signal from the
motor driver (IC403) for the TILT drive is applied to the TILT drive motor via the 4-pin connector (CN403).
In the position control, the home position for the TILT control is detected by the TILT sensor (IC401; photo coupler) when the
power is turned on, and then the position is open-loop controlled by the software. In order to remove variations among products,
the output from the TILT sensor (IC401) is input into the comparator (IC607) on the CPU board and the output (TILT_S) from the
comparator is detected in the CPU (IC101).
The motor drive power supply (VM voltage) for the TILT drive motor driver (IC403) is +12 V that is supplied from the IO board via
the Main board.
In the position control, the home position for the TILT control is detected by the TILT sensor (IC401; photo coupler) when the
power is turned on, and then the position is open-loop controlled by the software. In order to remove variations among products,
the output from the TILT sensor (IC401) is input into the comparator (IC607) on the CPU board and the output (TILT_S) from the
comparator is detected in the CPU (IC101).
The motor drive power supply (VM voltage) for the TILT drive motor driver (IC403) is +12 V that is supplied from the IO board via
the Main board.
18
BB-HCM547CE
4.7.
Power Supply Block
The above figure shows the flow to supply power.
There are two ways to supply power to the camera. One is the POE power feed via the LAN cable and the other is the power feed
from the AC adaptor.
The POE power feed is described in SECTION 4.8.
There are two ways to supply power to the camera. One is the POE power feed via the LAN cable and the other is the power feed
from the AC adaptor.
The POE power feed is described in SECTION 4.8.
[Power supply circuit on the IO board]
• The DC powers of +12 V and +3.3 V are generated on the IO board.
• The +12 V power is supplied by the AC adaptor or POE circuit mounted on the IO board. This +12 V power is used on the follow-
• The +12 V power is supplied by the AC adaptor or POE circuit mounted on the IO board. This +12 V power is used on the follow-
ing boards:
- IO board : +3.3 V DC-DC converter circuit and output terminal of the IO terminal (CN507).
- Main board : Power supply to drive the PAN motor drive driver, and DC-DC converter circuit for +5.6 V that is supplied to the
- Main board : Power supply to drive the PAN motor drive driver, and DC-DC converter circuit for +5.6 V that is supplied to the
camera unit.
- TILT board : Power supply to drive the TILT motor drive driver.
• The +3.3 V power is generated from the +12 V power in the DC-DC converter circuit (IC504). It is used on the following boards:
- IO board : Audio circuit and IO terminal unit
- Main board : All of the +3.3 V power supply
- Main board : All of the +3.3 V power supply
[Power supply circuit on the Main board]
• On the CPU board, the +1.2 V power used in the circuits internal to the CPU (IC101) is generated in the regulator (IC603). The
+5.6V power is generated from the +12 V power in the DC-DC converter circuit (IC609) and it is supplied to the Video board via
the TILT board.
the TILT board.
[Power supply circuit on the TILT board]
• On the TILT board, the +12 V power which is supplied from the IO board via the Main board is used on the following boards:
- TILT board : Power supply to the TILT motor drive driver
[Power supply circuit on the VIDEO board]
On the VIDEO board, +5.0V in the regulator (IC206) and +3.1 V in the DC-DC converter circuit (IC204) are generated from the
+5.6 V power supplied from the Main board.
+5.0 V and +3.1 V on the Video board is supplied to the Lens board,.
+5.6 V power supplied from the Main board.
+5.0 V and +3.1 V on the Video board is supplied to the Lens board,.
• The +3.1 V power is used on the following boards:
- VIDEO board: All IC of the +3 V
- LENS board : Power supply to the DC converter (IC302) of the IRIS control
- LENS board : Power supply to the DC converter (IC302) of the IRIS control
• The +5.0V powers are used on the following boards:
- VIDEO board: Power supply to the MOS SENSOR (IC201) and the TG/SG/CDS (IC 202)
[Power supply circuit on the Lens board]
• On the Lens board, +3.3 V in the regulator (IC208) is generated from the +5.6 V power supplied from the VIDEO board. The +12
V power is used on the following boards:
The +3.3 V power is used on the following boards used on the following boards:
The +3.3 V power is used on the following boards used on the following boards:
- Lens board : Power supply to the ZOOM motor driver (IC303)
19
BB-HCM547CE
4.8.
PoE Block
[Power receive]
The power supplied from a LAN cable receives voltage (+48 V) via a diode bridge from a RJ-45 connector (CN502) on the IO
Board.
There are 2 types of PoE receiving methods; a type using unused pins (4, 5, 7 and 8 pin) for LAN data transmission and a type
using the mid point of data lines (1, 2, 3 and 6 pin). This product is compatible with both types because it is equipped with 2 lines
(D501 and D502) of diode bridge circuits
The outputs of the 2 diode bridges described above are connected to the same poles and supply the subsequent circuits + and -
powers.
Board.
There are 2 types of PoE receiving methods; a type using unused pins (4, 5, 7 and 8 pin) for LAN data transmission and a type
using the mid point of data lines (1, 2, 3 and 6 pin). This product is compatible with both types because it is equipped with 2 lines
(D501 and D502) of diode bridge circuits
The outputs of the 2 diode bridges described above are connected to the same poles and supply the subsequent circuits + and -
powers.
[PD certification circuit]
The voltage obtained from the diode bridges is supplied to the PD control IC (IC501) of PoE.
The PD control IC (IC501) performs the following operations with the applied voltage from the supply side of power.
For applied voltage of 2.8 - 10 V from the supply side, it returns the internal resistance value of PD control IC (IC604) (25 kΩ).
For applied voltage of 15.5 - 20.5 V from the supply side, it returns the current value by the resistor connected to the Pin (5) of
IC501. (This product is resistance value (45.3 Ω) and it is designed with Class 3 specification.)
When 48 V is applied as the certification progresses, it conducts between the Pins (7) and (10).
The PD control IC (IC501) performs the following operations with the applied voltage from the supply side of power.
For applied voltage of 2.8 - 10 V from the supply side, it returns the internal resistance value of PD control IC (IC604) (25 kΩ).
For applied voltage of 15.5 - 20.5 V from the supply side, it returns the current value by the resistor connected to the Pin (5) of
IC501. (This product is resistance value (45.3 Ω) and it is designed with Class 3 specification.)
When 48 V is applied as the certification progresses, it conducts between the Pins (7) and (10).
[Voltage drop section]
When the power of 48V is supplied to the following DC/DC converter section based on the PD authentication, voltage is con-
verted by PD control IC (IC501), output FET (IC502), switching transformer (T501), rectification diode (D517 and D518), and
capacitor (C513), which results in output of +12 V.
verted by PD control IC (IC501), output FET (IC502), switching transformer (T501), rectification diode (D517 and D518), and
capacitor (C513), which results in output of +12 V.
[Switching with AC adaptor]
There is a DC jack (CN601), to which an AC adaptor is connected when POE is not used, and +12 V is input from the AC adap-
tor. Switching of +12 V from the PoE circuit is conducted by using diodes (D521 and D519).
tor. Switching of +12 V from the PoE circuit is conducted by using diodes (D521 and D519).
20
BB-HCM547CE
4.9.
Others
[I/O Terminal]
• The Input terminal has two systems; both of them are connected to the Input Port of the IC101 GPIO.
• Due to Internal Pull-up Resistance, the PNP Transistor (Q532, Q533) on the following level is usually in the OFF state and the
• Due to Internal Pull-up Resistance, the PNP Transistor (Q532, Q533) on the following level is usually in the OFF state and the
Input Port connected to the collector is at L level.
• If the terminal is short-circuited with the GND or the signal of L level is input, the PNP Transistor goes ON and the Input Port
goes to H level.
• The CPU checks the state of this port regularly to detect a change in this signal.
• The Output terminal is controlled by the Output Port of the IC101. When the Port output is L, the transistor (Q534) on the follow-
• The Output terminal is controlled by the Output Port of the IC101. When the Port output is L, the transistor (Q534) on the follow-
ing level is OFF and, when the output is H, the transistor is ON. This transistor has open collector output and it controls external
equipment via external pull-up.
equipment via external pull-up.
[RESET SW (SW103)]
• The RESET SW (SW103) mounted on the Main board is connected to the output of the RESET IC (IC106). It is usually at H level
and goes to L level, when the SW is pressed. It becomes the same movements as the hardware reset.
[CLEAR SETTING SW (SW101)]
• The Clear Setting SW (SW101) mounted on the Main board is connected to the Input Port of the GPIO. It is usually at H level and
goes to L level, when the SW is pressed.
• The CPU(IC101) monitors this Input Port periodically and, if it detects that this SW is pressed longer than a specified period, the
setting values other than the RTC are returned to factory settings.
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