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CPX200

Dual 35V 10A

Power Supply

Service Manual

Book Part Number 48511-0270 - Issue 1

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Summary of Contents for CPX200

Page 1: ...CPX200 Dual 35V 10A Power Supply Service Manual Book Part Number 48511 0270 Issue 1...

Page 2: ...Table of Contents Specifications 2 Safety 4 EMC 5 General 6 Circuit Descriptions 7 Calibration 12 Parts List 14 Component Layouts 22 Circuit Diagrams 25 1...

Page 3: ...Typically 5m in constant voltage mode Typically 5k in constant current mode voltage limit at max Output Protection Forward protection by Over Voltage Protection OVP trip maximum voltage that should be...

Page 4: ...ERAL AC Input 230V AC 14 50 60Hz Installation Category II Power Consumption 600VA max Operating Range 5 c TO 40 C 20 TO 80 RH Storage Range 40 C to 70 C Environmental Indoor use at altitudes up to 200...

Page 5: ...ntional interruption is prohibited The protective action must not be negated by the use of an extension cord without a protective conductor When the instrument is connected to its supply terminals may...

Page 6: ...te that electrostatic discharge direct to the output terminals will not damage the instrument but may trip the Overvoltage Protection OVP turning the output off see Protection section Note also that i...

Page 7: ...ning the top cover 2 To remove the upper control pcb proceed as follows Unplug the 26 way flat cables to the front panel pcb and the 16 way flat cables to the lower main pcb noting their orientation r...

Page 8: ...rise an input filter which ensures that the supply meets both conducted emission and conducted immunity EMC requirements VDR1 clips mains spikes for component protection R3 provides safety discharge f...

Page 9: ...e C23 at start up when VBULKA reaches about 150V there is enough voltage on C23 to turn on the high rail of IC1 and maintain the FET in an oscillating mode independent of output loading If for any rea...

Page 10: ...the PWM controller IC5 This amplifier is configured as a voltage follower with a gain of one IC5 then converts this input signal into a pulse width modulated squarewave which is used to drive the two...

Page 11: ...d into pin 4 of IC5 via the primary current limit circuit T2 D2 R2 VR5 R22 and R3 Measurement and Display The measurement system and display are controlled by a microcontroller IC11 The measurement of...

Page 12: ...s VR1 and VR2 on the front panel board via PJ8 pin 3 and on to the ADC as VPROGA via adjustable attenuating chain R88 VR7 R89 for display of preset voltage level The OVP front panel preset potentiomet...

Page 13: ...DMM set to 20A range in series with rheostat set to about 1 With output OFF set voltage controls to maximum and current control to 0 10A Switch output ON and adjust VR1 VR101 for 0 10A 01A on DMM Set...

Page 14: ...approximately 17V note the exact reading Open the switch and adjust VR4 VR104 for exactly the same reading close the switch again and check the reading is unchanged Remove the diode resistor and swit...

Page 15: ...OUND 3MM RED LED1 4 101 104 25061 9503 DISPLAY 4 DIGIT LED DISP1 2 101 102 27164 0506 IC ULN 2803A IC8 108 27231 2730 IC 74HC273 IC6 7 106 107 27234 5730 IC 74AC573 IC5 10 105 110 35555 2260 PCB FRONT...

Page 16: ...MF 50PPM R44 144 23202 2430 RES 4K30F W25 MF 50PPM R46 146 23202 2470 RES 4K70F W25 MF 50PPM R5 23 28 29 33 36 37 48 73 105 123 128 129 133 136 137 148 173 23202 2560 RES 5K60F W25 MF 50PPM R11 111 23...

Page 17: ...Cermet 10MM VR8 108 23379 3100 RES PS H10K Cermet 10MM VR2 3 102 103 23427 0331 CAP1N0K 63V CER HI K P5 C16 116 23427 0374 CAP 100PJ 100V CER N150 P2 5 C3 18 103 118 23427 0384 CAP 220PK 100V CER MED...

Page 18: ...5 IC10 110 27160 0017 IC V REG 7812 IC8 108 27160 0440 IC V REG LM2940CT5 IC9 109 27161 0120 IC V REF ZN404 ZRA245 2 45V D23 123 27168 0020 IC UC3846N IC5 105 27226 0510 IC 4051B IC13 14 113 114 27250...

Page 19: ...E L4 22300 0211 FUSEHOLDER PCB MOUNTING FOR FS1 22315 0248 FUSE 10A ANTISURGE T HBC CER FS1 22315 0402 FUSE 100mAT TL PCB MTG FS2 102 22520 0160 AC MAINS RECEP 10AMP R ANG MTG PJ3 22573 0202 HEADER 2...

Page 20: ...7U 25V ELEC P2 C63 163 23557 0676 CAP 470U 63V ELEC P5 C15 16 115 116 23620 0246 CAP 100NK 63V P E P5 C19 21 24 26 27 62 119 121 124 126 127 162 23620 0261 CAP 100NK 400V P E C17 18 117 118 23620 9007...

Page 21: ...0305 WASHER 5 16in SHK PRF I T ZPST GREEN TERMINAL 20038 9501 WASHER M3 Spring PCB FIXING 20038 9503 WASHER M3 5 SPRING TERMINALS 20234 0027 SCREW M3 X 6 PNHDPZ ZPST PCB FIXING 20657 0110 KNOB 15MM D...

Page 22: ...E UPPER LOWER 20234 0027 SCREW M3 X 6 PNHDPZ ZPST PCB SPACERS 20234 0028 SCREW M4 X 10 PNHDPZ ZPST FEET 20662 0201 BRACKET PLAS FOOT 3786 7001 20662 0530 FOOT POLY E BLACK P2629 22491 0010 MAINS LEAD...

Page 23: ...Component Layouts FRONT PANEL PCB 22...

Page 24: ...CONTROL PCB 23...

Page 25: ...MAIN PCB 24...

Page 26: ...Circuit Diagrams 25...

Page 27: ...CONTROL PCB PART CHANNEL A CHANNEL B IDENTICAL...

Page 28: ...CONTROL PCB PART CHANNEL A CHANNEL B IDENTICAL...

Page 29: ...MAIN POWER PCB...

Page 30: ...Thurlby Thandar Instruments Ltd Glebe Road Huntingdon Cambridgeshire PE29 7DR England Telephone 44 01480 412451 Fax 44 01480 450409 e mail sales tti test com web site www tti test com...

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