J307 Voltage Measurements - Agilent Technologies 66312A Service Manual

3 - Troubleshooting

J307 Voltage Measurements

J307 connects the A1 Main Board Assembly to the A2 Interface Assembly. Table 3-4 provides a quick
method of determining if the voltages between these assemblies are within the normal range. If any of these
voltages is outside the normal range, refer to the flowcharts to further troubleshoot the circuit associated
with the abnormal voltage.
Table 3-4. Voltage Measurements at J307 (A2 Interface to A1 Main board)
A1J307 Signal Name
Pin #
1 PM_INHIBIT (Enabled)
2 OV_SCR*
3 OV_PROG
4 FAN_PROG
5 OV_DETECT*
6 SW_POS (Norm)
7 RANGE_SELECT (High)
8 OS_TRIM_NEG (COMP)
OS_TRIM_NEG (SCPI)
9 +5Vs
10 COMMON
11 COMMON
12 +15Vs
13 -15Vs
14 HS_THERM (@25C)
15 FUSE
16 IMON_H
17 IMON_L
IMON_L (@20mA Out)
18 IMON_P
19 VMON
20 COMMON
21 COMMON
22 COMMON
23 COMMON
24 CV_PROG
25 CC_PROG
26 CC_DETECT*
27 CCN_DETECT*
28 CV_DETECT*
38
CV Mode
Full Scale Voltage
No Load
0
+5
+3.9
+2.8
+5
+5
0
+1.7
+4.0
+5
0
0
+15
-15
+2.5
+2.4
0
0
+4.8
0
+4.8
0
0
0
0
-4.8
-4.8
+5
+5
0
CC Mode
Full Scale Voltage
Full Load
0
+5
+3.9
+3.8
+5
+5
0
+1.7
+4.0
+5
0
0
+15
-15
+2.5
+2.6
+3.5
+14.7
+4.8
0
+4.8
0
0
0
0
-4.8
-4.8
0
+5
+5