Power Supply Voltage Check - HP 200 Series Hardware Support Document

54
Troubleshooting and Diagnostics
Power Supply Voltage Check
If the power supply is functioning but you suspect a problem with a voltage level, check the
appropriate test points as shown in Figure 8-4. The various voltages should be within the specifica-
tions listed in Table 8-3.
Table 8-3. Power Supply Specifications
Voltage Maximum
Voltage Tolerance
Current Ripple
Used By
-14 V - 13.30 to -18.00 V 0.7 A 140mV Fan, 110 connectorboard
-12 V - 11.50 to -12.40 V 0.6A 200mV CPU board,1I0 connectorboard
+5V 5.125 to 5.275 V 13 A
50mV All assemblies
+12 V
11.50 to 12.40 V 1.6A 200mV CPU board,1I0 connectorboard
+14 V 13.30 to 18.00 V 2.0A 140mV 110 connectorboard
Table 8-4. Power Supply Test Points
Voltage Test Point to Ground
- 14 V I/O connectorboard connector J2 pin 8
- 12 V RS-232 connector pin 11
+ 5 V RS-232 connector pin 36
+ 12 V RS-232 connector pin 10
+
14 V 110 connectorboard connector J2 pin 6
Note that the
-+
5 V line to the I/O connectorboard contains fuses. Therefore, the test point could
indicate proper voltage, but any interface may not be powered.
Front of liD Connectorboard
•
J2
- 12V Test Point
+
12V Test Point
1 • .....-
+
5V Test Point
• ""'-Ground
RS-232 Connector
•
•
25
•
• ~ +
14V Test Point
•
•
~
- 14V Test Point
Ground + 5V Test Point
Figure 8-4. Power Supply Test Points