B&K 1794 instruction manual Unit not Take Current

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( F ) UNIT NOT TAKE CURRENT.

UNIT NOT TAKE

CURRENT

Is Current Set Preset R21 OK ?	N	Replace It.
Y
Is Current Pot Short ?	Y	Replace It.
N
Is Wiring Related to	N	Ensure proper Continuity.
Current Pot OK ?
Y
Are Load Terminals connected
properly with Nut inside Unit ?
N
Ensure proper Terminal Contact.

1.Check Current set Preset R21. It might be open.

2.No Contact of Load Terminals with the Terminal Nut inside the Unit.

3.Current Pot might be Shorted.

6.Check Wiring related to Current Pot.

21

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Contents BK Precision Limited Two Year Warranty Table of Contents Output ON/OFF Switch Limit SettingSection General Information Description Remote Programming With External 5K PotSection Specifications Section Installation Input TAP Selection for 230V Operation Repackaging for ShipmentSection Operating Instructions Readjust the current limit in the remote sensing mode Output Capacitance Reverse Voltage LoadingReverse Current Loading Operators Safety Summary USE the Proper Power CordTerms in this Manual Terms AS Marked on Equipment Servicing Safety Summary For Qualified Service Personnel onlyDo not Service Alone USE Care When Servicing with Power onSection Service Instruction General Trouble Shooting TechniquesServicing shall be done only by Qualified personnel Repairs & Maintenance Page REF. PCB no PIN no Parts Ordering & ReplacingPage Page Fault Finding Procedure Fuse BlowsFuse Blows Unregulated O/P Voltage Unregulated O/P VoltageNo Output Voltage No O/P VoltageNo DPM Indication No DPM IndicationDPM not Read Unit not Take Current Unit not Take CurrentUnit Directly Goes to CC Unit Directly Goes To CCNo Current Control Poor Line RegulationNo Current Control Poor Line RegulationPoor Load Regulation CV, CC, LED not GlowPoor Load Regulation External Programming not OK Remote Sense not OKExternal Programming Not OK Section Part List & Schematics L1791-FP-CNT-0603 PCB Assy1KPF/100V, Disc 2P2W SW Push ButtonSW1 Grey Colour CAP for Push Switch SW2 SW3 PS-PREG-1791-0503 PCB AsslyDPM/01 REV 01 X PS-AUX-DC-L1791-0503 PCB Assly PS-PWR-L1791-0703A PCB AsslyFront Panel Assly Main Chassis AsslyBack Trough Assly Front Panel Layout Back Panel Layout TOP View Bottom View of Model 1790 Front Panel Control PCB of 1790 Power Module PCB of 1790 PRE Regulator / AUX. P/S PCBs 1790 Service Information Precision CorpPrecision Corp