HP 1660C Series Service Manual page 169

Check for the voltages on the power supply cable using the values in the following
6
table.
Signals on the Power Supply Cable
Pin Signal
1 +5.00 V
2 +5.00 V
3 +5.00 V
4 +5.00 V
5 Ground (Digital)
6 Ground (Digital)
7 Ground (Digital)
8 Ground (Display)
9 +3.50 V
10 Ground
To test the power supply voltages
Pin Signal
11 –5.20 V
12 Ground
13 +12 V
14 Ground
15 –12 V
16 Ground
17 +12 V (Display)
18 –5.20 V
19 +15 V (Fan)
20 Ground (Fan)
Troubleshooting
5–25