Figure 3-1 Sheet 3. Troubleshooting Flowchart - Agilent Technologies 6631B Service Manual

From Sheet 2
Program current to full
scale, voltage to Vmax
and load to the power
supply's rated current.
Supply should be in CC.
Will not go into CC
or error > 10%
?
No
Output out of spec
but close?
No
Output OK but
meter wrong?
No
Turn on OCP and
insure Protect trips.
Prot trips?
Yes
Goto Sheet 4

Figure 3-1 Sheet 3. Troubleshooting Flowchart

CC_Prog OK ?
Yes
(see Table 3-4)
No
Replace A2
Calibrate unit
Yes
Calibrate current. If still
wrong or will not
Yes
calibrate, replace A2
CC_detect* low?
No
(see Table 3-4)
Yes
Replace A2
Troubleshooting - 3
Replace A1
Yes
Check cable W7,
No
replace A1
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