B&K 1794 instruction manual Front Panel Assly, Main Chassis Assly, Back Trough Assly

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6.FRONT PANEL ASSLY

Reference

Part

Reference

Part

Designator

Description

Designation

Description

POT

 

 

 

VR1

5K, WWPOT

VR3

500E, WWPOT

VR2

1K, WWPOT

VR4

50E, WWPOT

SWITCH

 

 

 

SW1

16A/250V ON/OFF SWITCH

 

7.MAIN CHASSIS ASSLY

Reference Part

Designator Description

RESISTOR

 

 

 

R1

4.7K/2W, MOR

 

 

R2

0.025E / 25W SHUNT

 

DIODES

 

 

 

CR1

U30D40C (30AMP/400V DUAL DIODE)

CAPACITORS

 

 

 

C1

6 X 15,000µF, ELE

 

 

C2

1µF / 250V AC CAP X 2

 

RECTIFIER HEATSINK ASSLY

 

 

DIODES

 

 

 

CR1

40HFR20

CR3

40HF20

CR2

40HFR20

CR4

40HF20

SCR1

2906, 25A

 

 

SCR1

2906, 25A

 

 

FILTER

15A/20A, RFI FILTER

 

VARISTOR

130V OR 230V TYPE 20D 361

 

FAN1

12V / 24V INNOVATIVE ( HI COOL )

FAN2

12V / 24V INNOVATIVE ( HI COOL )

8.BACK TROUGH ASSLY

Reference Part

Designator Description

FUSE1

20AMP, TYPE F ( 115V ) 8 Amp TYPE T ( 230V ) ( 6.5mm X 32mm )

MAIN BOARD 3 PIN AMERICAN 12 AWG 3 CORE CABLE

REMOTE TERMINAL 4 WAY 10A TERMINAL BLOCK

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Contents BK Precision Limited Two Year Warranty Table of Contents Limit Setting Output ON/OFF SwitchSection General Information Description Remote Programming With External 5K PotSection Specifications Section Installation Repackaging for Shipment Input TAP Selection for 230V OperationSection 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 For Qualified Service Personnel only Servicing Safety SummaryDo 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 Parts Ordering & Replacing REF. PCB no PIN noPage Page Fault Finding Procedure Fuse BlowsFuse Blows Unregulated O/P Voltage Unregulated O/P VoltageNo O/P Voltage No Output VoltageNo DPM Indication No DPM IndicationDPM not Read Unit not Take Current Unit not Take CurrentUnit Directly Goes To CC Unit Directly Goes to CCPoor Line Regulation No Current ControlNo 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 L1791-FP-CNT-0603 PCB Assy Section Part List & Schematics1KPF/100V, Disc 2P2W SW Push ButtonPS-PREG-1791-0503 PCB Assly SW1 Grey Colour CAP for Push Switch SW2 SW3DPM/01 REV 01 X PS-PWR-L1791-0703A PCB Assly PS-AUX-DC-L1791-0503 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 Precision Corp Service InformationPrecision Corp