Sony DVS-7200A Installation Manual page 17

5-2. Adjustment of Secondary Power Supply Voltage
5-2-1. DVS-7200A
DVS-7200A has the four power sources, +5 V (A), +5 V (B), +3 V, and _5 V. Voltages +5 V (A) and
_5 V can be checked at the test points on the CPU-264 board with digital voltmeter. Voltages +5 V (B)
and +3 V can be checked at the test points on the XPT-16 board with digital voltmeter. After the installa-
tion of all plug-in board, be sure to check all voltages in accordance with the following procedures.
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Confirm that the power unit is properly inserted and secured by the four screws.
When only standard power unit is installed, refer to the following procedures for power
unit A.
This standard power unit is named as power unit A
(Procedures for Power Unit A)
(1) Detach the front panel of DVS-7200A. (Refer to "4-3-1 Removing and Installing of Front Panel")
(2) Turn on the power switch of the power unit A.
(3) Confirm that all indicators (D15, D16 and D18) on the CPU-264 board light.
(4) Connect the digital voltmeter between test terminals on the CPU-264 and the XPT-16 boards and
confirm that the voltage value of each test connector meet the specification shown in the next page.
If the specification does not meet, adjust the voltage by the adjustment potentiometers of the power
unit A.
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When connecting the probes of the digital voltmeter between test terminals, take care to avoid
contacting the probes with the GND areas of the shield plates.
When the power unit BKDS-7690 is installed, refer to the following procedures for power
unit B.
The power unit of BKDS-7690 is named as power unit B.
(Procedures for Power Unit B)
(1) Turn off the power switch of the power unit B.
(2) Carry out all steps of "procedures for power unit A".
(3) Turn off the power switch of the power unit A and turn on the power switch of the power unit B.
(4) Confirm that all indicators (D15, D16 and D18) on the CPU-264 board light.
DVS-7200AE IM
5-2. Adjustment of Secondary Power Supply Voltage
5-17