Power Supply Voltage Adjustment With Hkds-7695A - Sony HDS-7150 Installation Manual

8-1. HDS-7150/7100 (HKDS-7695/7695A)

8-1-3. Power Supply Voltage Adjustment with HKDS-7695A

When Only One Power Unit is Installed
(Connected to the POWER SUPPLY 1 Connector)
This power unit is named as "power unit A".
(Procedure A)
(1) Remove the front cover of the power unit A.
(Refer to Section 8-1-1.)
(2) Loosen the screw and rotate the cover of adjustment
potentiometer by 180d.
(Refer to the following illustration.)
(3) Remove the front panel of the HDS-7150/7100. (Refer
to "2-5. Removal of Front Panel".)
(4) Remove the board holder and the lower fan assembly
from the HDS-7150/7100. (Refer to "2-6. Removal of
Parts on the Front".)
(5) Confirm that the redundant switch is set in the "1" position.
(6) Turn on the power switch of the power unit A.
(7) Confirm that the all indicators (D13, D14, and D15)
on the CKG-26 board light. (Refer to page 8-5.)
(8) Connect the digital voltmeter between the test termi-
nals on the CKG-26, VSW-66 and the OUT-20 boards
and to the connector CN4 on the CN-1539 board on
the top of the fan assembly. Confirm that the voltage
value of each test terminal meets the specification
shown in the table on page 8-5.
If the specification is not met, adjust the adjustment
potentiometers of the power unit A as shown below.
m
. When connecting the probes of the digital voltmeter
between the test terminals, be careful not to contact the
probes with the GND areas of the shield plates, etc.
. The voltage measurements of +5 V (B) and +5 V (C)
are performed at the VSW-66 board and the OUT-20
board that are each inserted in slot 13 and 16.
Power indicator
Redundant
switch
Loosen the screw
8-4
+5 V (A)
Adjustment driver
Cover of adjustment potentiometer
Turn the cover
When the Second Power Unit (redundant) is Installed
(Connected to the POWER SUPPLY 2 Connector)
The second power unit is named as "power unit B".
(Procedure B)
(1) Remove the front cover of the power unit B. (Refer to
Section 8-1-1.)
(2) Loosen the screw and rotate the cover of adjustment
potentiometer by 180d. (Refer to the following
illustration.)
(3) Switch the redundant switches of the power unit A
and power unit B to "2".
(4) Turn off the power switch of the power unit B.
(5) Perform the procedure A.
(6) Turn off the power switch of the power unit A, and
turn on the power switch of the power unit B.
(7) Confirm that the all indicators (D13, D14, and D15)
on the CKG-26 board light. (Refer to page 8-5.)
(8) Connect the digital voltmeter between the test termi-
nals on the CKG-26 and the OUT-20 boards and to
the connector CN4 on the CN-1539 board on the top
of the fan assembly. Confirm that the voltage value of
each test terminal meets the specification shown in the
table on page 8-5.
If the specification is not met, adjust the adjustment
potentiometers of the power unit B as shown below.
(9) Turn on the power switches of the power units A and
B.
(10) Confirm that the power indicators of the power unit A
and B light. If an indicator does not light, perform the
adjustment from step (1) in the procedure B again.
+5 V (B)
+5 V (C)
+12 V
_5 V
+3 V
HKDS-7695A
HDS-7150/7100