Agilent Technologies 6612B, Service Manual, Page: 38 / 74

3 - Troubleshooting
38
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
Pin #
Signal Name CV Mode
Full Scale Voltage
No Load
CC Mode
Full Scale Voltage
Full Load
1 PM_INHIBIT (Enabled) 0 0
2 OV_SCR* +5 +5
3 OV_PROG +3.9 +3.9
4 FAN_PROG +2.8 +3.8
5 OV_DETECT* +5 +5
6 SW_POS (Norm) +5 +5
7 RANGE_SELECT (High) 0 0
8 OS_TRIM_NEG (COMP) +1.7 +1.7
OS_TRIM_NEG (SCPI) +4.0 +4.0
9 +5Vs +5 +5
10 COMMON 0 0
11 COMMON 0 0
12 +15Vs +15 +15
13 -15Vs -15 -15
14 HS_THERM (@25C) +2.5 +2.5
15 FUSE +2.4 +2.6
16 IMON_H 0 +3.5
17 IMON_L
IMON_L (@20mA Out) 0
+4.8
+14.7
+4.8
18 IMON_P 0 0
19 VMON +4.8 +4.8
20 COMMON 0 0
21 COMMON 0 0
22 COMMON 0 0
23 COMMON 0 0
24 CV_PROG -4.8 -4.8
25 CC_PROG -4.8 -4.8
26 CC_DETECT* +5 0
27 CCN_DETECT* +5 +5
28 CV_DETECT* 0 +5