B&K Precision 1794 - Manual - Manual (Page 26)

( H ) NO CURRENT CONTROL.
NO CURRENT CONTROL
Is Current Pot Open ? Replace it.
Are Wires related to Current Pot OK ?
Ensure proper Connectivity.
1. Check the Current Potentiometer. It might be Open.
2. Check all Wires related to Current Potentiometer.
Y
N
Y
( I ) POOR LINE REGULATION.
POOR LINE REGULATION
Improper Device Drop Setting. Keep the Input Supply at rated I/P.
Keep the O/P Supply at rated Vtg.
and rated Load. Measure Vtg.
across O/P +Ve and Capacitor
Leaky Summing Capacitor C4. +Ve Adjust that Vtg. between 4.5V
to 5V with Preset VR1 ( 5K ) on
PREG PCB.
Replace It.
1. Check whether Device Drop is between 4.5V to 5V. It might not be proper.
2. Leaky Summing Capacitor C4 on PREG PCB.
Y
N
Y
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