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( H ) NO CURRENT CONTROL.
NO CURRENT CONTROL
Y
Is Current Pot Open ?
Replace it.
N
Are Wires related to Current Pot OK ?
Y
Ensure proper Connectivity.
1.
Check the Current Potentiometer. It might be Open.
2.
Check all Wires related to Current Potentiometer.
(I)
POOR LINE REGULATION.
POOR LINE REGULATION
Improper Device Drop Setting.
N
Leaky Summing Capacitor C4.
Y
Y
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
+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.
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