Lenovo NetVista Hardware Maintenance Manual (HMM) for NetVista 2251, 6830, and - Page 44

-pin main power supply connection, Power supply removal, Attention, Signal, Function

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20-pin main power supply connection See "A40/A40P/A40i system board layout" on page 31 for connector locations. Attention: These voltages must be checked with the power supply cables connected to the system board Pin Signal 1 3.3 V 2 3.3 V 3 COM 4 5V 5 COM 6 5V 7 COM 8 POK 9 5VSB 10 12 V 11 3.3 V 12 -12 V 13 COM 14 PS-ON 15 COM 16 COM 17 COM 18 No voltage 19 5V 20 5V Function +3.3 V dc +3.3 V dc Ground +5 V dc Ground +5 V dc Ground Power Good Standby Voltage +12 V dc +3.3 V dc -12 V dc Ground DC Remote Enable Ground Ground Ground Not used +5 V dc +5 V dc If the voltages are not correct, and the power cord is good, replace the power supply. Power supply removal 1. Remove the cover (see "Removing the cover" on page 19). 2. Remove the screw that secures the power supply to the rear of the chassis. 3. Push the metal tab that secures the power supply to the chassis to release the power supply. 36 Hardware Maintenance Manual

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20-pin main power supply connection
See
“
A40/A40P/A40i system board layout
”
on page 31 for connector locations.
Attention:
These voltages must be checked with the power supply cables connected to the system
board
Pin
Signal
Function
1
3.3 V
+3.3 V dc
2
3.3 V
+3.3 V dc
3
COM
Ground
4
5V
+5 V dc
5
COM
Ground
6
5V
+5 V dc
7
COM
Ground
8
POK
Power Good
9
5VSB
Standby Voltage
10
12 V
+12 V dc
11
3.3 V
+3.3 V dc
12
-12 V
-12 V dc
13
COM
Ground
14
PS-ON
DC Remote Enable
15
COM
Ground
16
COM
Ground
17
COM
Ground
18
No voltage
Not used
19
5V
+5 V dc
20
5V
+5 V dc
If the voltages are not correct, and the power cord is good, replace the power
supply.
Power supply removal
1.
Remove the cover (see
“
Removing the cover
”
on page 19).
2.
Remove the screw that secures the power supply to the rear of the chassis.
3.
Push the metal tab that secures the power supply to the chassis to release the
power supply.
36
Hardware Maintenance Manual