HP 1660E Series Service Manual page 161

Troubleshooting
To test the power supply voltages
6 Check for the voltages on the power supply cable using the values in the following
table.
Signals on the Power Supply Cahle
Pin Signal
Pin
Signal
1
+5.00V 11
-5.20 V
2 +5.00 V 12 Ground
3
+5.00V 13 +12V
4 +5.00V 14 Ground
5 Ground (Digital) 15
-12V
6
Ground (Digital)
16 Ground
7
Ground (Digital)
17
+12 V (Display)
8 Ground (Displayl
18
-5.20 V
9
+3.50 V 19
+15 V (Fanl
10 Ground 20 Ground IFan)
tA
0
,5 DOV
- - - P'n 1
f-ronl of
0 ,j
OOV
Instrumenl
0
,SODV
0 'SODV
0
Ground [Dlspluy)
0 Ground [Dlsploy)
~
0 Ground [DISpluy)
0 Ground [DISploy)
0
.3 SOy
0 Ground
0
-5 lOY
0 Ground
0
-12V
~
0
Ground
~~~
0 -12V
0 Ground
0
,12V lDlSPlay)
~
0
-520Y
0
.15V IFon!
01:>60d)
0 Ground IFonl -- Pin 20
5-25