Sony DME-7000 Maintenance Manual page 41

If the specification is not satisfied, adjust the voltage as
described below.
The voltage adjustment is performed with the digital
voltmeter connected to the check terminals.
[Adjustment procedure]
1. Remove the two screws, then remove the blind plate of
the power supply unit.
2. Insert the tip of an adjustment driver from the adjust-
ment window, and turn the adjustment potentiometer
of the switching regulator. Adjust the potentiometer
until the digital voltmeter read a proper voltage.
n
Set the power supply voltage with the all plug-in
boards to be used inserted.
Adjustment driver
BVTT3 x 5
RV1
RV2
RV3
Blind plate
1-11. Confirmation of Secondary Power Supply Voltage
Voltage Measurement of +12 V
It is not required to adjust a voltage of +12 V.
If it is necessary to confirm the voltage, confirm the
voltage according to the following procedures.
1. Remove the fan cover on the rear panel.
(Refer to the section 2-4-2.)
2. Connect a digital voltmeter between 1-pin (+12 V) and
3-pin (GND) of the connector terminal (CN301 or
CN302) for a DC fan, and confirm that the voltage
value is satisfied the specification.
+1
Specification: +12 V
–0
CN301
+12V 1-pin
GND 3-pin
+12V 1-pin
GND 3-pin
CN302
Rear panel
1-33 (E)