Power Supply Unit Adjustment; Power Supply Unit - Sony FVS-1000 System Maintenance Manual

6-2. Power Supply Unit Adjustment

6-2. Power Supply Unit Adjustment

6-2-1. Power Supply Unit

The FVS-1000 system has two power supply units; the
upper power supply unit mainly supplies power to the
ninth board from the right of the processor to the left
board, while the lower power supply unit mainly supplies
power from the right board of the processor to the eighth
board.
From the upper From the lower
power supply unit power supply unit
Eighth board from the right (SY-256)
SHUTDOWN
button
SYSTEM
indicator
POWER
indicator
Power switch Power supply unit
Voltage Specification
+12.00 ± 0.05 V dc
+12 V
+5.00 ±0.05 V dc
+5 V
+0.05
+3.3 V +3.30
_0.00
_5.00 ±0.05 Vdc
_5 V
+5.10 ±0.05 Vdc
+5 V (A)
+12.00 ± 0.05 Vdc
+12 V (B)
6-2
Upper power
supply unit
Lower power
supply unit
_5 V
+12 V B
+12 V A
+5 V A
+5 V B
+3 V
Check terminals
GND E
+5 V A
+12 V B
+12 V A
GND A
Potentiometers
Check terminal
EX-632 board
+12 V ↔ GND (E2)
EX-632 board
+5 V ↔ GND (E2)
Vdc EX-632 board
+3.3 V ↔ GND (E2)
EX-632 board
_5 V ↔ GND (E2)
Upper power supply unit
+5 VA ↔ GND E
Upper power supply unit
+12 VB ↔ GND E
A. Checking/adjusting the voltage of the upper
power supply unit
Measuring instruments: Digital voltmeter
Tool: Extension board EX-632
(For front board)
Preparations
1. Open the door at the bottom of the unit, and turn OFF
the breaker and two power supply switches.
2. Loosen the four screws, and remove the front cover of
the processor.
3. Insert the extension board EX-632 into DCP1 slot
(fourth from the left) along the guide rail.
4. Turn ON the breaker and two power supply switches.
Extension board (EX-632)
Check terminals
+12 V
+5 V
+3.3 V
+3.3 V -2
–5 V
Front cover
Extension board (EX-632)
Adjustment potentiometer
Power supply unit
1+12 VA
Power supply unit
1+5 VB
Power supply unit
1+3 V
Power supply unit
1_5 V
Power supply unit
1+5 VA
Power supply unit
1+12 VB
E2
FVS-1000 MMP1