J207 Voltage Measurements - Agilent Technologies 6631B Service Manual

J207 Voltage Measurements

Cable W7 connects the A1 Main Board Assembly J307 to the A2 Interface Assembly J207. Table 3-4
provides a listing of the voltages between these assemblies. Flow charts in Figure 3-1 will refer to several of
these voltages to determine if they are outside the normal range.
Table 3-4. Voltage Measurements at J207 (A2 Interface to A1 Main board)
A2J207 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*
CV Mode
Full Scale Voltage 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
Troubleshooting - 3
CC Mode Signal Origin
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
A2
A2
A2
A2
A1
A1
A2
A2
A2
A1
A1
A1
A1
A1
A1
A1
A1
A1
A1
A1
A1
A1
A1
A2
A2
A1
A1
A1
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