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3-2. Confirmation and Adjustment of Secondary Power Supply Voltage
3-2-2. BKFD-7800 (HDD extension box)
BKFD-7800 has the power supply of +12V and +5 V.
After installation is completed, confirm the power supply
voltage in the unit as described below.
The internal power supply voltage check must be
implemented also when an additional BKFD-7009/7009A
(HDD unit) is installed.
1. Confirmation for voltage of +12 V A and +5 V
The power supply voltages of +12 V (A) and +5V are
used mainly to drive the BKFD-7800 circuitry and BKFD-
7009/7009A (HDD unit) motor.
The adjustment potentiometers and check terminals to
attach the probes of a digital voltmeter for the voltage
measurement are mounted on the front panel side of
power supply unit.
<Check procedures>
1. Remove the front panel. (Refer to the section 1-5-2.)
2. Confirm that the power supply unit is properly inserted
and securely fixed with the four screws.
3. Confirm that the required number of BKFD-7009/
7009As has been installed in the BKFD-7800.
4. Turn ON the power and confirm that the indicator of
power supply unit light .
5. Connect the digital voltmeter between check terminals
on power supply unit. Confirm that the voltage values
of each check terminal meet the following
specifications.
n
Take care not to short the circuit between probes of a
digital voltmeter and front panel of power supply unit.
6. If the specification does not meet, adjust the voltage as
described below.
n
Perform any adjustments when the required number of
BKFD-7009/7009As has been installed.
The required number of BKFD-7009/7009As to be
installed differs depending on the system used. (Up to
four BKFD-7009/7009A units can be installed in the
BKFD-7800.)
Voltage
Specification
+12.00 ± 0.05 V
+12 V
+5.00 ± 0.05 V
+5 V
3-10(E)
BVTT
3 x 6
Power Indicator
Check terminal
Power Supply Unit
+12 V A ↔ GND A
Power Supply Unit
+5 V ↔ GND B
PSW3 x 6
Power Supply Unit
+5 V
GND (B)
+5 V
Check
Terminal
Power Supply Unit
POWER Switch
Adjustment potentiometer
Power Supply Unit
1+12 V
Power Supply Unit
1+5 V
+12 V
+12 V
GND (A)
Check
Terminal
Adjustment
Potentiometer
FDDR-7000 IM
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