QPX1200 Service Manual - Issue 1
Contents
1. QPX1200 CONTROL PCB R32 Bx R IER DIDA C TE mL 1 LEDI 2 8 1200 KEYBOARD aa aw 35555 4780 ISS 2A OVP OCP BUS TYPE BUZZ 3 d LED4 ON OFF ST2. 4 9152MHZ ovp_seT 7 E 7 PJIBI 6Oa VOLTS CONTROL 2k 07 mim R213 330 PJI81 FO 9 Rug 125 p 560K FJiol EO5 JaK 199 CUT gt AMPS_CONTROL TRIP OUT 2 05 L 1 PJ ii cO LOGIC IN 3 Giaa ISVA BVA BEL mE BVA VOL TS MONITOR PJ1I81 BO 9 BC859f 585 3 3 1 PJ181 AO 1 1 7 7 R223 5 R107 70 wz e 16 CIG mw 568k BVA 278 10K 270 4 We u5 330 mm ve 5 v 5 Je VDD IC194 D 53V R35 5 4853 3 8 C148 v v 0 Dz mra R222 LOGIC_OUT 1992 vor 4 lt NSS Ria Sa 10K TRIP 25V cisa 7 OVP RESET 338 BVA AMPS _MONITOR 3V3A 188N IBBN Ba C159 cisi mm C162 es mm 3V3A BVA TUM mes T SU 1 gt PJ185 A Oe 3 avDA ava BVA Ics R143 BUS BAR R174 2 4 R124 304 PJ102 278 2K2 5 5 RED 2 1 3 228N PJ185 B OZ 2 gt i 3 480V 101 PE a 3V3A AMPS_REG z BAS21 1 CHASSIS SNS PWR_FAIL cs C4 Cizi ciza Dia 22a higan IN 3 ece4sc 7 nza R4 18k inut 2 437 igav 5401 3V3
3. 9 F lt IN M V I gt amp HT FASI 028 STW45NM50 TPS 58 HT 2 47K STW45NM5 2 2W 2 ZVS TRUU20 029 STW45NM5 Q7 STW45NM5 OSCINH 4069 OSCINH R43 198 ____ ZTX751 GATE AA SK2 SKI D3 R3 ze AUXI STTH68883CW 3R3 14 02 C91 c32 IRFSON20DPBF 284 __ 8135 Fes FB7 FB2 Pav y 1 9 sTwsa 3 57460 3 srwea TP4 A NE I V RI5 SOURCE BC849C 2W5 19K ww d R12 3 4 PRIMAUX 08015 aRa15 15 ele SFHB15A 3 4 1 GATEB z BVSEC GATE2 3 2 BB 5 LTPSUPPLY NOTE z NOT FITTED aL 937 FAN BRACKET 2 8127 21 2W RI7 C18 220 PRIMAUX 24YFRIM TP20 1 38 D19 Bah PJ8 AQ 22 BAV21 C88 4 4 LM358M C22 av 08 R27 1128 3 BAv99 R28 6M8 5M8 PRIMAUX 9 1a 1 was PJI A CHASSIS OSCINH 2 gt c74 QPu1 B FANDRIVE SDWN E 3 12 1 24VPRIM BUM 4 PRIMAUX ds PJ1 D BAV99 ji _ OPJI E 6 APJI F O C31 C17 19U om IC8 B LM358M 6 4 82K LM358M V SEC diss C35 10K P
4. 139 EEEEJEJEEJEJEJEJEJE eaa INTERFACE ASSEMBLY 36 35555 4688 QPX12 PFC FDI tz 2 gt 16 mes Eee ta FBI 1200 COMPONENT LAYOUT m EJ 327 D29 928 1 D31 PJIA mo 224 F66 586 867 Res 2 r et 25 Eko Piu ky 555 csa D 1 52 N Dia D34 R43 1012 _ e pm re Y ri pec GS PTCI SKI _ 98 H51 R2 R5 S ao 88 u fc c 04 05 06 5 TP3 m RI2 RI3 RI4 RI5 1 m c N D un en 5 z m A a 8 35 14 R56 237 LEDI R45 938 038 T5 LI R24 8 03 038 c N E E die mm
5. AP 06 rzd_4l is Fian C89 c7 13 tm Fm 3 a ag 22 s z 54 E R87 R48 C48 amp Fee Vaz asa R61 RI A 1555 VARI 7 028 024 osc m 74 a 241142 VAG 35555 4690 3 EK CM QPX1200 R26 POWER mi RI21 C3 PJI ICI PJ7 557 R69 R66 C55 m 084 1 R67 p45 5 78 022 5 o a s s 9 Gi c SIL UE 032 T m g RII cas R75 R49 a R5 n N A gias sa i ICB m 035 wo 5 129 034 PJ5 QPX1200 POWER PCB COMPONENT LAYOUT Circuit Diagrams 37 QPX1200 PFC PCB Sheet 1 of 2 QPX1200 PFC PCB Sheet 2 of 2
6. 7 GATE EN gt 19 2 01 RTxcz SNS_ERR 5 P9 28 MAT1 3 MOSII C31 21 gt P8 21 SSELI MAT3 8 C146 22P EN Sia TS_REG 32 0 22 Sey sw _EDia2 3 AMPS P 23 AINI 4 i TRIP_OUT Pa 24 AIN2 T LOGIC_IN 34 P9 25 AING x2 1215 8 5VA EMG TEK LOGIC QUT S P2 26 AIN7 LM324M 2888 TRST P8 27 TRST CAP2 0 19 RTCK 8 DO TMS PO 28 TMS 2 1 vss RLY_DRIVE BCB49C m TCK 15 28 2 2 55 C134 3 TDI 12 9 38 TDI MAT3 3 VSS 24 CRE TDO P 31 TDO 4053 29 28 LED_DRIVE RTCK RTCK VSSA i vi v BCH4S QVDA 12 2 z C136 10K na RIBS s s Yo BVA C137 1K 10K 25V BVA EQUALS NOT FITTED ava QPX1200 CONTROL PCB CY dd d od gd d TT QPX1200 KEYBOARD PCB ac 22 QPX1200 INTERFACE 7 Thurlby Thandar Instruments Ltd Glebe R
7. DIO SM BAS21 DIO SM ZHCS500 TRAN SM NPN BC849C TRAN SM NPN FZT651 60V 3A IC SM LM358M DUAL OP AMP IC SM V REG LM1117 ADJ IC SM V REG LM1117 3V3 IC SM V REF ZRC250 2 5V 2 IC SM 74HC14 IC SM 74HC574 IC SM MCU LPC2103 PCB KEYBOARD PCB ASSEMBLY R TERMINAL 44115 3190 Part Number 23557 0731 23620 0267 23620 0268 35555 4980 Description CAP 100U 100V ELEC LOW ESR CAP 100NK 100V P E P5 CAP 220NK400VP E 468 SER P15 PCB REAR TERMINAL PCB ASSEMBLY INTERFACE 44115 3150 Part Number 22573 0248 22574 0450 22574 0495 22575 0065 35358 0580 Description HEADER 3 WAY STR 1P F LOCK SKT 9W D TYPE CLIP IN SKT USB TYPE B PCB MTG HEADER 20 WAY 2X10 STR SKELN EARTHING SPRING USB Position 1 3 11 12 16 17 20 25 6 10 18 19 26 27 5 15 D5 D1 4 Q2 Q1 IC7 IC3 IC4 IC1 05 IC6 2 Position C1 C2 C3 Position PJ3 PJ2 PJ1 PJ4 5 SP1 31 PCB ASSEMBLY SM INTRFACE 44115 3151 Part Number 23105 0330 23105 2100 23105 2150 23105 2220 23105 3100 23105 3470 23105 4100 23407 0180 23461 0020 23461 0500 23559 2221 23595 0010 25021 1010 25061 0304 25377 1000 27160 1030 27162 1060 27239 0140 27250 2210 27253 0050 27253 0060 23407 0220 25340 1000 23411 0475 23105 0000 28500 2040 35555 4880 Part Number 10232 0306 10232 0360 10233 0106 10366 0610 20500 0010 20620 0010 20662 0570 32 Description RES 5 0805 33R0F W1 R
8. EN61326 1998 EMC product standard for Electrical Equipment for Measurement Control and Laboratory Use Test limits used were a Radiated Class b Conducted Class A c Harmonics EN61000 3 2 2000 Class A the instrument is Class A by product category Immunity EN61326 1998 EMC product standard for Electrical Equipment for Measurement Control and Laboratory Use Test methods limits and performance achieved were a EN61000 4 2 1995 Electrostatic Discharge 4kV air 4kV contact Performance A b EN61000 4 3 1997 Electromagnetic Field 3V m 80 AM at 1kHz Performance B c EN61000 4 11 1994 Voltage Interrupt 1 cycle 100 Performance B d 61000 4 4 1995 Fast Transient 1kV peak AC line 0 5kV peak DC Outputs Performance B EN61000 4 5 1995 Surge 0 5kV line to line 1kV line to ground Performance f EN61000 4 6 1996 Conducted RF 3V 80 AM at 1kHz AC line only DC Output connections 3m not tested Performance B According to EN61326 the definitions of performance criteria are Performance criterion A During test normal performance within the specification limits Performance criterion B During test temporary degradation or loss of function or performance which is self recovering Performance criterion C During test temporary degradation or loss of function or performance which requires operator intervention or system reset occurs Where Performance B is st
9. 20236 0010 22443 0002 22571 1101 34 FIXINGS amp FASTNERS Description RIVET SNAP LOCK 4 1D X 5 5T RIVET SNAP LOCK 4 1Dx7 5T RIVET SNAPLOCK 3 6Dx2 2 3 1T WASHER M4x12x1 ZPST WASHER M3 SHK PROOF I T ZPST WASHER M4 SHK PROOF I T ZPST WASHER 5 16in SHK PRF I T ZPST WASHER M4 SPRING SCREW No 6 x 3 8 NIB HDPZ ST AB SCREW M2 5 x 6 PLAS PNHDPZ NUT M3 ZPST NUT M4 BARB NUT M4 SERRATED FLANGE NUT M6 BARB ZPST CAPTIVE NUT SPIRE No 6 SCREW M4 x 16 PNHDPZ ZPST SCREW M4 x 8 PNHDPZ ZPST SCREW M4 x 10 PNHDPZ ZPST SCREW M3 x 6PNHDPZ C W EXT SH PROOF SCREW M4 x 12 TAMPERPROOF GROMMET 3109A WASHER ALUMINIUM EARTH TERMINAL Position INTERNAL FAN FIXING FAN MOUNTING REAR PANEL R PANEL CHASSIS EARTH TERMINAL EARTH CHASSIS FRONT PANEL FRONT FEET REAR SAFETY EARTH REAR TERMINAL PCB FIXING FOR FRONT PANEL EARTH REAR TERMINAL PCB FIXING CASE BEZEL FIXING CHASSIS FRONT PANEL SAFETY EARTH EARTH TERMINAL POWER PCB OUTPUT CASE UPPER CHASSIS REAR PANEL BACK FEET REAR TERMINAL PCB FIXING FRONT FEET KEYBOARD CONTROL PCB POWER PCB CHASSIS PFC PCB CHASSIS WIRE SUPPORT BRACKET CHASSIS REAR PANEL CHASSIS FRONT PANEL SAFETY EARTH WIRE SUPPORT BRACKET FOR FRONT PANEL EARTH Component Layouts i V NSET IS JOG OFF JOG PJS AND REAR MOUNTED
10. continued Part Number 25603 0220 27103 1010 27106 0644 27106 1110 27106 1160 27106 1350 27153 1160 27153 1190 27160 1010 27160 1030 27227 0510 27236 0530 27250 2190 35555 4960 Description TRAN SM FET N FDV303N 25V IC SM LM339A QUAD IC SM TLO74CD BI FET OP AMP IC SM LM358M DUAL OP AMP SM LM324M OP IC SM OPA277 PREC AMP IC SM ADS1241 8x24ADC IC SM DAC8551 IC SM V REG LM1117 ADJ IC SM V REG LM1117 3V3 IC SM 4051 IC SM 74HC4053 IC SM MCU LPC2102 PCB CONTROL PCB ASSEMBLY PFC 44115 3100 Part Number 20234 0023 20234 0100 20613 0007 20613 0026 20661 0225 20670 0340 20670 0364 20670 0365 20670 0550 20670 0560 22040 0901 22040 0920 22040 0940 22109 0350 22109 0380 22154 0210 22154 0240 22154 0740 22154 0790 22240 0210 26 Description SCREW M4 X 8 PNHDPZ ZPST SCREW M3x6PNHDPZ C W EXT SH P SIL PAD TO220 PLAIN SIL PAD 9005 100MM X 25MM SPACER Hex M3 x 12 NPBR HEATSINK TO220 CLIPON 29DEG W CLIP MAX01H FOR TO220 MAX H S CLIP MAX03H FOR TO247 MAX H S HEATSINK MAX505 90MM PLAIN HEATSINK MAX505 210MM PLAIN BEAD FERRITE FX1115 BEAD FERRITE LEADED B R BEAD DOUBLE FERRITE TRANSFORMER AUX 5V TRANSFORMER AUX PRIMARY CHOKE 2uH INDUCTOR BOOST CHOKE 17 5uH 12A CHOKE 2mH 15A COMMON MODE RELAY SPST 24V G8P Position Q112 113 IC107 IC103 6108 IC114 IC115 TIC101 IC116 IC102 IC105 IC113 IC112 IC106 IC104 1C111 Position HEATSINKS PCB SUPPOR
11. 0805 47ROF W1 RES 5 0805 56R0F W1 RES 5 0805 100RF W1 RES 5 0805 220RF W1 RES 5 0805 270RF W1 RES 5 0805 330RF W1 RES 5 0805 430RF W1 RES 5 0805 560RF W1 RES 5 0805 1KOOF W1 RES 5 0805 1K20F W1 RES 5 0805 2K00F W1 RES 5 0805 2K20F W1 RES 5 0805 2K70F W1 RES 5 0805 3K30F W1 RES 5 0805 3K60F W1 RES 5 0805 3K90F W1 RES 5 0805 4K70F W1 RES 5 0805 6K80F W1 RES 5 0805 8K20F W1 RES 5 0805 10K0F W1 RES 5 0805 15 W1 Position LED100 D110 IC109 110 IC117 IC100 101 100 Position R121 122 R185 R5 R112 R225 R193 R40 41 R220 R105 R108 R173 174 R126 131 R144 145 R7 R208 R123 R125 R137 R139 R150 R152 R166 R175 R187 190 R196 R202 R207 R6 R117 118 R124 R151 R204 R133 R111 R100 R135 R154 R168 R113 R114 R132 R147 148 R1 4 R106 107 R109 110 R142 R149 R159 R162 R169 172 R176 183 R198 201 R203 R205 R215 R222 R134 R209 210 R211 R218 PCB ASSEMBLY SM CNTL 44115 3181 continued Part Number 23105 3200 23105 3220 23105 3270 23105 3470 23105 3680 23105 4100 23105 4330 23105 4470 23105 4560 23105 6100 23107 3270 23407 0100 23407 0220 23407 0470 23411 1104 23461 0015 23461 0020 23461 0030 23461 0040 23461 0070 23461 0300 23559 4101 23559 5100 23595 0010 23662 0108 25021 0050 25021 0070 25021 1010 25031 1030 25132 0100 25132 0320 25340 1000 25377 1000 25391 0010 Description RES SM0805 20KOF W1 RES 5 0805
12. 22 W1 RES 5 0805 27KOF W1 RES SM0805 47 W1 RES SM0805 68KOF W1 RES SM0805 100KF W1 RES SM0805 330KF W1 RES 5 0805 470KF W1 RES SM0805 560KF W1 RES SM0805 10MOF W1 RES SM0805 27 W1 25PPM 5 0805 10P CER NPO CAP 5 0805 22 CER NPO CAP 5 0805 47P CER NPO 5 1206 100 100 X7R 5 0805 10NK 50 X7R 5 0805 100 50 5 5 0805 220 16 X7R 5 0805 1 50 X7R 5 0805 4N7J 50 X7R 5 0805 100 25V X7R CAP SM 1000 25 AL ELEC CAP SM 100 35V AL ELEC CAP SM A 100 16V CAP 2N2K 100 P C P5 DIO SM BAV99 SWITCHING DIO SMBAS116 DIO SM BAS21 DIO SM ZHCS500 DIO ZEN 3V9 W5 DIO SM ZEN 3V3 W35 TRAN SM PNP BC859C TRAN SM NPN BC849C TRAN SM NPN BF820 Position R119 R163 R165 R217 R140 141 R191 R206 R212 R194 R197 R120 R153 R164 R167 R192 R221 R224 R158 R213 214 R223 R146 R195 R101 102 C107 108 C146 147 C109 C123 C130 C3 7 C31 C165 C1 C100 102 C104 106 C111 C132 C134 C137 C139 C141 143 C145 C148 C150 C162 C166 C176 C28 C168 169 C164 C124 C170 C172 C133 135 136 C138 C140 C144 C149 C167 C103 C110 C163 C30 D103 D116 117 D105 D100 102 D106 107 D111 D113 114 D1 2 D104 D3 D112 Q100 101 Q103 Q105 Q102 Q104 Q109 111 Q114 115 Q106 107 25 PCB ASSEMBLY SM CNTL 44115 3181
13. Unregulated mode is detected separately on the Power board 107 IC107b provide signals to the processor so that it knows what mode the power supply is in Demand Setting The voltage and current demands together with OVP limit and the pseudo analogue outputs are generated by a digital to analogue converter IC105 together with analogue switch IC106 and a series of sample and hold circuits For each of the 5 channels the setting consists of a both a setting of a DAC reference and a value setting Consider the voltage demand as an example First the processor sets the analogue switch IC104a directly across IC103 and sets IC106 to connect to IC108a Writing a suitable value to the DAC sets the reference for the next conversion The processor now opens the switch to the input of IC108a so that the setting is held Next switch IC104 is switched so that R119 and R120 in circuit This gives the correct reference for the demand to be set Now the processor writes the correct demand to the DAC and once it has had time to settle the output is switched via IC106 through to IC108b where the demand is held on 0113 This whole process is repeated in a similar way for each of the 5 channels Note that the voltage demand channel Volts Set and the current demand Amps Set have additional filtering to prevent large over undershoots when the demand is changed Measurement OVP The system accurately measures the output voltage and current and a
14. adjustment or repair Capacitors inside the supply may still be charged even if the supply has been disconnected from all voltage sources but will be safely discharged about 10 minutes after removing power If any adjustment or repair of the opened supply under voltage is inevitable it shall be carried out only be a skilled person who is aware of the hazard involved The incoming AC supply to the unit under test should be isolated for safety by means of a 1 1 isolation transformer of at least 1500VA High voltages up to 400V are always present in the primary side circuits on both the PFC board and Power board on the Power board the primary side occupies a clearly defined area at the rear of the board 1 Remove the 4 side screws to release the top cover 2 To gain access to the Control PCB and Keyboard release the front panel assembly from the chassis by removing the 2 M3 side nuts the countersunk M3 screw securing the top bracket and the 4 M3 screws with integral shakeproof washers along the bottom edge 3 Keyboard Remove the 5V supply from PJ4 the 4 connections to the mains switch and the 3 way connections to the Control PJ10 amp Interface PJ9 boards The Keyboard is released from the front panel by removing the 7 screws which secure it 4 Control Remove the 10 way connector PJ100 to the Power board noting polarity corner marker to pin1 remove the flat cable connection to PJ101 and the 3 way connection to the Keyboar
15. remote sense terminals on both front and rear panels Sense miswiring trip and indication Ripple amp Noise 20MHz bandwidth Typically lt 3mVrms lt 20mV pk pk at maximum load CV mode Load Regulation Change in output for any load change within PowerFlex envelope using remote sense Constant voltage lt 0 01 5mV Line Regulation Change in output for a 10 line change Constant voltage lt 0 01 5mV Transient Response lt 250us to within 100mV of set level for a 5 to 95 load change Output Protection Output will withstand an applied forward voltage of up to 70V Reverse protection by diode clamp for reverse currents up to 3A Over voltage Protection Range 2V to 65V Resolution 0 1V accuracy 0 2 0 2V OVP Response time typically 1005 Over current Protection Range 2A to 55A Resolution 0 1A accuracy 0 5 0 2A OCP Response time typically 100ms Over temperature Protection The output will be tripped off if a fault causes the internal temperature to rise excessively Temperature Coefficient Typically lt 100ppm C METER SPECIFICATIONS Display Type 5 digit Volts 4 digit Amps black on white backlit LCD Voltage CI Mode and Unreg Resolution 1mV Accuracy 0 1 of reading 2 digits Current CV Mode amp Unreg Resolution 10mA Accuracy 0 3 of reading 2 digits VxA Resolution 0 1W Accuracy 0 5 0 1W LOGIC CONTROL INPUT and OUTPUT LOGIC IN is a rear panel opto isolated input
16. 1 23424 0472 23428 0470 23557 0506 23557 0667 23557 0673 23557 0820 23557 0827 23620 0236 23620 0252 23620 0264 23620 0267 23620 0268 23684 0021 23685 0013 25021 0910 20 Description RES 33R0J 2W MF 250PPM RES 100RJ 2W 250PPM RES 220RJ 2W MF 250PPM RES 4K70J 2W MF 250PPM RES 47K0J 2W MF 250PPM RES 1K00B W25 MF 15PPM RES 2R20J W33 MF FUSIBLE NRF25 RES 22R0J W33 MF FUSIBLE NRF25 RES 22R0J W33 MF FUSIBLE NRF25 RES 220RJ W33 MF FUSIBLE NFR25 RES 47RJ 2W5 WW RES 0R015J 2W5 WW RES 220RJ 4W WW RES 47R0J 3W MO RES PS H 1K0 CF 6MM RES PS H 10K CF 6MM RES PS H 47K CF 6MM THERMISTOR PTC TAG 90 DEG CAP 220PK 1KV CER P5 CAP 4N7K 1KV CER P7 5 P10 CAP 2N2K 1KV CER P5 P7 5 CAP 47PG 100V CER NPO P2 5 CAP 10U 63V ELEC P2 CAP 220U 25V ELEC RE2 P3 5 CAP 22U 35V ELEC RE2 P2 CAP 10U 50V ELEC LOW ESR P2 CAP 470U 100V LOW ESR P7 5 CAP 1NOK 100V P E P5 CAP 2N2K 63V P E P5 CAP 100NK400VP E 368 SER P15 CAP 100NK 100V P E P5 CAP 220NK400VP E 468 SER P15 CAP 2U2K 400V P P P27 5 CAP 330NK 160V 250V P P P15 DIO BAV21 Position R26 R140 R51 R141 R127 R131 132 R149 150 R72 R85 R88 R56 R138 139 R50 R10 R17 R7 R11 R18 R12 15 R55 R8 VR3 VR1 2 VR5 VR4 TH1 TH3 C16 C4 C6 C12 C13 14 059 C66 C25 C40 610 615 C20 C43 44 055 C87 17 C5 C7 8 11 18 027 C37 38 058 064 76 77 C80 C21 C26 C91 92 C22 C102 C1 3 C35 D1 2 D13 D15 D19 D29 D31 D
17. 1 C62 via D19 D7 D8 and dissipated in R23 R6 R9 Snubber networks C22 R15 R19 C23 R16 R21 C24 R18 R22 reduce switch off losses in the MOSFETs The main boost heatsink is protected against excessive temperature by PTC2 IC12 and associated components once triggered it is necessary to turn the mains power off and on again to restart Power Board Forward Converter The 400V HT supply from the PFC board is connected to the Power board via FAS1 and FAS2 decoupled by C2 C1 and C3 with their respective bleed resistors R149 and R150 form the voltage divider to feed the converter transformer T1 of the half bridge forward converter The half bridge configured power MOSFETs Q28 and Q29 are connected to the converter transformer T1 via the current transformer CT1 and ZVS inductor L2 and operate at a fixed duty cycle of about 42 at a switching frequency of 73kHz See the gate drive waveform in Photograph C4 and C12 work with L2 to facilitate zero voltage switching for Q28 and Q29 R11 C16 and FB3 damp high frequency ringing across T1 primary See photograph 02 The gate drive pulses for Q28 and Q29 are generated by oscillator IC2 B IC2 C feeding into IC3 A to produce complimentary square waves at IC3 A pins 1 and 2 The leading edges of these anti phase square waves are slowed by R39 C37 and R42 C38 and buffered by IC2 A E D F to produce anti phase pulse trains of the correct duty cycle to drive the gate drive transformer
18. 120 121 R3 R24 R29 R144 145 R128 R130 R142 143 R158 R157 R40 R43 R25 R65 R76 R102 R125 R153 154 R20 R30 32 R39 R42 R64 R69 70 R74 75 R80 R83 R90 R92 R117 118 R16 R99 R63 R107 R36 R44 R84 R86 R98 R147 R67 68 R77 R79 R81 R129 21 PCB ASSEMBLY SM POWER 44115 3061 continued Part Number Description Position 23105 2510 RES 5 0805 5K10F W1 R66 R78 23105 3100 RES 5 0805 10KOF W1 R9 R22 R53 R58 R61 R71 R82 R87 R89 R94 R96 R104 106 R109 R112 115 R124 R126 R146 23105 3200 RES 5 0805 20 W1 R137 23105 3220 RES 5 0805 22 W1 R35 R46 47 R95 R108 R122 23105 3330 RES 5 0805 33KOF W1 R21 23105 3390 RES 5 0805 39KOF W1 R91 23105 3470 RES 5 0805 47 W1 R57 R60 R123 23105 3620 RES 5 0805 62KOF W1 R119 23105 4100 RES 5 0805 100KF W1 R62 R110 23105 4220 RES 5 0805 220KF W1 R19 R48 R54 23105 4470 RES 5 0805 470KF W1 R111 R116 23105 4750 RES 5 0805 750KF W1 R38 R101 23105 5100 RES 5 0805 1MOOF W1 R93 23461 0015 CAP 5 0805 10 50V CER X7R C47 48 C65 C79 23461 0020 CAP 5 0805 100N50V CER Y5V C19 C34 23461 0030 CAP 5 0805 220NK 16V CER X7R C94 95 23461 0050 CAP 5 0805 22NJ 50V X7R C85 23461 0300 CAP SM0805 100NK 25V CER X7R C24 C28 33 C36 C42 C45 C49 52 C 54 55 C57 C61 63 C67 70 C72 C75 C88 90 C96 23559 5220 CAP SM 22U 35V AL ELEC C86 C93 23595 0100 CAP SM B 4U7M 16V TANT C39 25021 0050 DIO SM BAV9
19. 20RF W1 RES 5 0805 1 W1 RES 5 0805 2K20F W1 RES 5 0805 3K30F W1 RES 5 0805 4K70F W1 RES 5 0805 10 W1 RES 5 0805 22 W1 RES 5 0805 27 W1 RES 5 0805 33KOF W1 RES 5 0805 36KOF W1 RES 5 0805 47 W1 RES 5 0805 100KF W1 Position C35 C35B C70 C68 C1 C4 C7 C10 C15 16 C18 C61 62 D20 D5 8 D19 D33 D9 D1 4 Q1 6 IC10 1C13 1C15 5 6 FOR 15 17 Position TP1 LK2 R94 R90 R5 R8 R11 R14 R17 R20 R27 R3 R57 R95 96 R47 R56 R78 R71 R80 R82 R24 R43 R48 R50 R79 R91 R54 R58 R62 63 R74 R76 77 R31 33 R49 R64 65 R68 R72 R81 R85 R46 R75 R93 R37 R51 R61 R99 104 PCB ASSEMBLY SM PFC 44115 3101 continued Part Number 23105 4180 23105 4220 23105 4330 23105 4360 23105 4430 23105 4470 23105 4510 23105 4750 23105 5100 23406 2474 23407 0471 23411 0104 23461 0015 23461 0200 23461 0300 23559 3470 23559 5100 25021 0050 25115 1010 25115 1010 25132 0230 25132 0310 25132 0330 25132 0340 25377 1000 27106 1110 27106 1160 27156 0180 27160 1070 27168 1030 27253 0150 35555 4600 Description RES 5 0805 180KF W1 RES 5 0805 220 W1 RES 5 0805 330KF W1 RES 5 0805 360KF W1 RES 5 0805 430KF W1 RES 5 0805 470KF W1 RES 5 0805 510KF W1 RES 5 0805 750KF W1 RES 5 0805 1MOOF W1 CAP 5 0805 470 16V CER X7R CAP 5 0805 470P CER NPO 5 1206 100 50 CER X7R 5 0805 10NK
20. 35 D38 D55 PCB ASSEMBLY POWER 44115 3060 continued Part Number 23210 0330 25031 0100 25031 0150 25031 0250 25130 0207 25130 0231 25130 0915 25349 3500 25384 9001 25388 0211 25601 0490 25601 0710 25601 0750 25601 0800 27001 0060 27160 0013 Description RES 33R0J 2W MF 250PPM DIO BAX12A DIO UF4006 DIO STTH6003CW DIO ZEN 15V W4 DIO ZEN 8V2 W4 DIO ZEN 75V W4 TRAN PNP MJE350 TRAN PNP ZTX751 TRAN NPN ZTX651 TRAN MOSFET CHAN 50V 60V TRAN MOSFET NCHAN HUF75652G3 TRAN MOSFET CHAN STW45NM50 TRAN MOSFET NCHAN IRFP90N20DPF OPTO COUPLER SFH615A 3 IC 7815 ASSEMBLY SM POWER 44115 3061 Part Number 22469 1000 23105 0000 23105 0010 23105 0022 23105 0033 23105 0100 23105 0220 23105 0240 23105 0750 23105 1100 23105 1470 23105 2100 23105 2180 23105 2220 23105 2300 23105 2330 23105 2470 Description TEST POINT SMT RES 5 0805 ZERO OHM RES 5 0805 1R00F W1 RES SM0805 2R20F W1 RES 5 0805 3R30F W1 RES 5 0805 10R0F W1 RES SM0805 22ROF W1 RES 5 0805 24R0F W1 RES 5 0805 75R0F W1 RES 5 0805 100RF W1 RES 5 0805 470 W1 RES 5 0805 1 W1 RES 5 0805 1K80F W1 RES 5 0805 2K20F W1 RES 5 0805 3K00F W1 RES 5 0805 3K30F W1 RES 5 0805 4K70F W1 Position R26 D16 17 D22 23 D47 D3 D6 7 D11 D25 26 D36 D37 D56 D5 Q37 Q15 Q18 Q13 Q17 Q38 Q3 6 Q28 29 Q2 Q8 IC17 18 9 Position 6 8 9 11 15 R97 R100 R
21. 40 BUZZER 41 70 015 RESONATOR CERAMIC 12MHZ PCB ASSEMBLY SM KEYBOARD 44115 3111 Part Number 23105 0000 23105 0047 23105 0100 23105 0560 23105 1100 23105 1150 23105 2100 23105 2220 23105 3100 23105 3150 23105 3220 23105 3470 23105 4100 23105 4300 23105 4470 23105 5100 23407 0220 30 Description RES SM0805 ZERO OHM RES 5 0805 4R70F W1 RES 5 0805 10R0F W1 RES 5 0805 56R0F W1 RES 5 0805 100RF W1 RES 5 0805 150RF W1 RES 5 0805 1K00F W1 RES 5 0805 2K20F W1 RES 5 0805 10 W1 RES 5 0805 15 W1 RES 5 0805 22 W1 RES 5 0805 47 W1 RES 5 0805 100KF W1 RES 5 0805 300KF W1 RES 5 0805 470KF W1 RES 5 0805 1MOOF W1 CAP 5 0805 22P CER NPO Position LCD FIXING FOR LED1 5 SW1 K1 20 TP1 3 PJ4 PJ7 PJ9 10 PJ3 PJ6 VR1 LED1 5 LCD1 BUZZ1 X1 Position R4 R19 R21 R44 R32 R40 R23 R50 54 R1 R5 6 R9 R17 R22 R43 R45 R55 R24 31 R33 39 R41 42 R7 R2 R46 R10 R8 R11 12 R15 R14 R13 C13 14 PCB ASSEMBLY SM KEYBOARD 44115 3111 continued Part Number 23411 0475 23461 0020 23461 0334 23559 2221 23559 4101 23595 0010 25021 1010 25031 1030 25377 1000 25381 1020 27106 1110 27160 1010 27160 1030 27161 2030 27239 0140 27239 5740 27250 2230 35555 4760 Description CAP SM1206 4U7K 16 CER X7R CAP 5 0805 100NZ 50V CER Y5V CAP 5 0805 330NK 25V CER X7R CAP SM 220U 10V AL ELEC CAP SM 100U 25V AL ELEC CAP SM A 1U0M 16V TANT
22. 50 X7R 5 0805 2N2J 50V CER X7R CAP 5 0805 100NK 25V X7R CAP SM 47U 16VALELEC CAP SM 100 35V AL ELEC DIO SM BAV99 SWITCHING DIO SM US1J 1A 600V 75ns DIO SM US1J 1A 600V 75ns DIO SM ZEN 5V1 W35 DIO SM ZEN 5V6 W35 DIO SM ZEN 24V W35 DIO SM ZEN 12V W35 TRAN SM NPN BC849C IC SM LM358M DUAL OP AMP IC SM LM324M OP AMP IC SM TNY267G IC SM TL431 IC SM L4981AD IC SM MIC4427 PCB PFC Position R59 60 R59B R60B R40 42 R70 R41B R42B R34 35 R38 39 R34B R35B R38B R39B R36 R45 R44B R45B R29 R30 R29B R30B R44 R10 R66 67 R69 R73 C55 56 C41 C36 C36B C65 C40 25 33 38 39 45 48 C50 53 57 58 C60 C71 79 C82 C80 D11 D18 D24 32 D34 D10 D21 D36 D37 D23 D35 D22 D38 Q8 11 Q13 IC12 IC8 IC9 IC11 4 1 3 29 PCB ASSEMBLY KEYBOARD 44115 3110 Part Number 20661 0282 20661 0872 22224 0020 22226 0101 22573 0048 22573 0222 22573 0247 22573 0248 22575 0065 22575 0550 23377 4100 25061 0201 26100 0240 26100 0241 28151 0010 28502 0020 Description SPACER Rnd 3 7 ID x 3 2 L Nyl SPACER TOWER RND 4 80Dx8L ENCODER ROT 24 POSITION KEYSWITCH ALPS SKHHBW HEADER 3WAY STR SIL STD GOLD HEADER 2 WAY STR F LOCK 156P HEADER 2 WAY STR 1P F LOCK HEADER 3 WAY STR 1P F LOCK HEADER 20 WAY 2X10 STR SKELN SKT 22W 1 0 FPC VERT RES PS H 100K CF 10MM LED T1 ROUND 3mm RED LCD 240 X 64 GRAPHICS BACKLIT HOLDER FOR 26100 02
23. 9 SWITCHING D9 D14 D18 D20 D28 D30 D32 D39 44 D46 D50 52 25061 0300 LED SM RED 3 2 X 2 8MM LED1 2 25132 0200 DIO SM ZEN 6V2 W35 D27 25132 0270 DIO SM ZEN 7V5 W35 D45 25132 0310 DIO SM ZEN 5V6 W35 D4 D8 D12 D24 D49 25132 0320 DIO SM ZEN 3V3 W35 D10 25334 1010 TRAN SM PNP MMBT2907A Q20 Q24 25340 1000 TRAN SM PNP BC859C 25377 1000 TRAN SM NPN BC849C 25381 1000 TRAN SM NPN SMBT3904 Q22 23 Q26 27 27106 1110 SM LM358M DUAL OP AMP IC5 IC8 1014 15 27106 1210 SM LMC662CM IC7 Q9 016 Q31 Q34 35 Q11 12 014 021 025 Q30 Q32 Q36 22 PCB ASSEMBLY SM POWER 44115 3061 continued Part Number 27151 1030 27227 0130 27227 0690 27227 0810 27253 0140 35555 4690 Description IC SM AD633 IC SM 4013 IC SM 4069 IC SM 4081 IC SM MIC4428 PCB POWER PCB ASSEMBLY CONTROL 44115 3180 Part Number 10300 0324 20030 0263 20037 0401 20038 9501 20210 0101 20210 0110 20234 0023 20234 0024 20613 0016 20661 0873 20670 0580 22240 0070 22467 0120 22573 0048 22573 0086 22573 0210 22573 0248 22575 0065 23202 2100 23215 2383 23215 3909 23215 4680 23296 0060 23557 0731 23557 0841 23620 0249 23620 0268 23662 0207 Description PAD P E S AD 6 X 3MM WASHER M3 ZPST SOLDER TAG PLAIN M4 WASHER M3 SPRING NUT M3 ZPST NUT M4 BARB SCREW M4 X 8 PNHDPZ ZPST SCREW M3 X 16 PNHDPZ ZPST SIL PAD RECTIFIER SPACER TOWER 4 800 X 6L HEATSINK TO220 AAVID 7025B RELAY TYPE 47 12VDC TERMINAL BL
24. A FE 5 2 C124 4 RL120 B 1 D2 lt gt zHcs5Ba ICH5 C use R40 gf TYPE47 2 1 LM324M 19 75 e 3 Qus a BVA e REAR_SNS 2 3 E 5 miaci4i C142 C143 2 OT PJias c O 100Nm ON mmm 224 e By 1 5VA Rza3 2108 2K2 18K AMPS _SET BVA 2 3 IC113 QVDA 4 LMitt7 R165 4 MEE aias Ein 22 BE REAR_SNS QVDA Here D 25 SNS_ERR BASII6 12 PA 8 TXDB MAT3 1 VDDA SAIRA de RI42 18 PB 1 RXD MAT3 2 4558 0124 BAVSS cza EURE CS_ADC 37 P 2 SCLO CAPB 2 VDD_3v3 222 BCB48C zu PCE 5 211 2 3 5 0 VDD_3V3 gt 8 3 79 4 SCKB CAPO I Il MISOB 54 0 5 1 R121 55 P8 8 MOSIB CAPB 2 c28 8 P2 7 SSELQ MAT2 0 _1 228 8 SNS p 29 16 RIB3 56 OVP THIP P8 B TXDI MAT2 I 22K OP_ENABLE P8 9 AXDI MAT2 2 DBGSEL OVP_RESET Pa 18 RTSI CAPI B AIN3 YOETSSSET LED_DRIVE 37 P2 11 CTS1 CAP1 1 AIN4 55 RLY_DRIVE 57 P8 12 DSRI MATI B AINS RESET BAZ Ba 44 P2137DTRI MATLI PWR FAIL 45 14 DCDI SCK1 EINTI VOLTS_REG RIS ADC_RDY PQ 15 RII EINT2 za ICH5 m aTxci 25 KA LM324M SNS GATE SA 47 P9 18 EINTA MATA 2 183 GATE_S P2 17 CAPI 2 SCLI RIBB R176 8177 R178 8178 48 iU MOS Fide ok dde We 52 7 P9 18 CAP1 3 SDAI 25 16
25. ES 5 0805 1KOOF W1 RES 5 0805 1K50F W1 RES 5 0805 2K20F W1 RES 5 0805 10 W1 RES 5 0805 47 W1 RES 5 0805 100KF W1 5 0805 18P CER NPO CAP 5 0805 100NZ 50V CER Y5V CAP 5 0805 407 6V3 CER X5R CAP SM 220U 10V AL ELEC CAP SM A 1UOM 16V TANT DIO SM BAS21 LED SM0805 RED TRAN SM NPN BC849C IC SM V REG LM1117 3V3 IC SM TPS60401 IC SM 74HC14 IC SM MCU LPC2148 IC SM 14C88 IC SM 14C89 CAP 5 0805 22P CER NPO TRAN SM PNP BC859C CAP SM1206 4U7K 16V CER X7R RES SM0805 ZERO OHM XTAL SM 12MHZ 30 50PPM 16PF PCB INTERFACE MECHANICAL PARTS Description SLEEVE 50 X 25MML BLACK TUBING PVC CLEAR 9 5ID TUBING H S 9 5MM BORE CLEAR TAPE ALUMINIUM FOIL FAN GUARD 80MM CLIP ENCODER KNOB FOOT SELF ADHESIVE GREY Position R3 4 R15 R19 R21 R22 R20 R1 R5 7 R10 14 R16 18 R25 R8 9 R2 R23 C3 C11 C2 C9 10 C14 C4 6 C15 C12 13 C1 D1 LED1 Q2 IC3 IC6 IC4 05 2 C7 8 Q1 C16 R24 XTL1 Position FOR POWER OUTPUT WIRES FRONT FEET Part Number 20662 9101 22040 0030 22040 0090 22219 0140 22454 0060 22491 0270 22491 0280 22571 0741 22571 1030 22571 1040 22571 1100 22575 0077 22575 0078 22575 0202 22575 0204 22575 0210 28522 0030 31512 1000 31512 1020 31711 0190 33143 0290 33143 0300 33331 8850 33331 8860 33331 8870 33537 1130 33537 1140 37113 2090 37151 0430 43171 2600 48511 1030 MECHANICAL PARTS continued De
26. LE 2 12173 VOLTS_SET L L 7 172 R120 DACREFA PJIOQ A 5VA LM358M PJ122 8 O2 25 IET FJiga c O3 VREFA 1 18 ot 5 gt os ICIB3 D ans 188 570 2 AVDD DVDD 12 x TLa74 LJ KB PJiaa E 6 2 REF 14 16114 3 r O84 VREFA CORSE b iat Riaz 2 _ cie4 47 REF ADS1241 RES ava 13 PJiaa G O BVA 27 27K8 INA AT mE 8 PJIaB HO TRIP Uriage BEN AIG PDWN R187 1 vel 6 PJ188 1 O 9 ciga scka scLk PJiaa J O mE 14 n IC125 Ru el 27 fg 2 MOS Ia Zi pata DACB551 BVA 3K3 _ s Y t t ej 5 za E Dar jA SDI MOS 1a 21 EZ 8162 Ala SDO MISOB 1 VDD PJia PO Ria4 1 szu cia2 VREFA 19 26 CS_DAC GATE SI s 8 OA OONmmm 5 scka GND AMPS SET PJIa1 0O0 REAR_SNS cs 23 CS ADC BATE SE 9 Lee 14 LL 28 PJ101 NO _ REAR_SNS BUF sateen 5 VA RIS RUS LB s PJ181 MO 2 a Dvss 2 PJIBI L 12 SNS a OF SNS VorTs coNTROL gt PJ181 KO VOLTS_MONITOR xo PJIB1 J O24 AMPS CONTROL L n 5 Ri29 DVBZSET 8 3V3A RI PJ181 1 O __ AMPS_MONITOR 2 L R212
27. OCK 2W LIGHT GREY HEADER 3WAY STR SIL STD GOLD HEADER 16W 2x8 LATCHING HEADER 10 WAY STRAIGHT 156P HEADER 3 WAY STR F LOCK HEADER 20 WAY 2X10 STR SKELN RES 1K00F W60 MF 50PPM RES 3K83B W25 MF 15PPM RES 90K9B W25 MF 15PPM RES 680KB W25 MF 15PPM RES 0R002 4 TERM PBV CAP 100U 100V ELEC LOW ESR CAP 47U 35V ELEC P2 CAP 330NK 63V P E P5 CAP 220NK400VP E 468 SER P15 CAP 470PK 100V P C P5 Position IC6 IC3 2 IC10 IC11 IC13 Position FOR XTAL FOR R143 FOR R143 FOR R143 FOR R143 FOR R143 FOR R143 FOR R143 FOR R143 FOR LED100 FOR R143 RL100 SK100 TP100 PJ101 PJ100 PJ105 PJ103 R136 R138 R155 R219 R156 R160 R103 104 R143 C120 121 C2 C112 117 C118 119 C30 23 PCB ASSEMBLY CONTROL 44115 3180 continued Part Number 25061 0201 25117 0020 27001 0050 27160 0009 27161 0060 28500 0800 28502 0020 35358 0600 PCB ASSEMBLY SM CNTL 44115 3181 Part Number 23105 0000 23105 0220 23105 0470 23105 0560 23105 1100 23105 1220 23105 1270 23105 1330 23105 1430 23105 1560 23105 2100 23105 2120 23105 2200 23105 2220 23105 2270 23105 2330 23105 2360 23105 2390 23105 2470 23105 2680 23105 2820 23105 3100 23105 3150 24 Description LED T1 ROUND 3MM RED DIO 1N5401 OPTO COUPLER 6N136 IC 7805 V REF 171009 2 50V XTAL 4 9152MHZ MICROPROCSR RESONATOR CERAMIC 12MHZ BUS BAR CONTROL Description RES SM0805 ZERO OHM RES 5 0805 22R0F W1 RES 5
28. ORE RECALL ADDR BAUD PJ6 REAR p a 8 SHIFT EST 523 E KIZ cz 125 FD3 203 puz m FDI 5 slslsl Is ma E oj als Sess zs H2 icne e e e m 124 2151 css D 2 PJ185 PII gt c147 F146 141 ci39 5 58 M NES PAESE EJ E ole 3 E123 R147 2 MIR 5 2 H 8 x zia mas czs mi Ri 2 Rz 5214 24 3 t S an x _ quz 0101 z A 5 5 8175 T SI Bla E mas 8222 oda C144 e Cus o _ z R281 g bze 77 ies c133 D jaj oj 5 ble cus s lee C136 lt R143 D 7 ET 5 9 cuz w N lo U 5 0 yO RIS 2231310 fciga E s A ise 8 5 12188 5 5 5 5 5 2 5 sls 5 SD E oj SO 8l 4 R48 cn DO RL198 15193 28 R17 RUS D gt n Ri33 c132 5195 12184 Rua RUG 1 K XIBI RnB n IDICISB n 217 sez RIB7 M i R59 5 E of Am 182 0105 159 5 Rise 8141 12182 R5 s 5 Ez A c3 RZ C4 5 C167 FD2 a H3 35 ISS ZA 35555 4880 On
29. P 2 LM358M BAV99 ry D GATE 4 T3 A 7 28 29 Pav QPX1200 POWER PCB Sheet 1 of 3 1217 SFH615A 3 2 3 AUXI TBI s RETURN O 4 O SD ENABLE gt IC6 AD633 5 b 8 1OPJ4 A LOGIC 2 IE 182 5 20PJ4 B LOGIC 62 1218 3 PJ4 C ALARM OUT SI BG Sua n LOGIC QPJ4 D h O SOPJ4 E 4 V SEC 2 PZ al TB3 BOPJ4 H C46 10K AMPS CONTROL 4 1 25 PJ4 J VOLTS CONTROL O cel C fi jack V SEC je 1 10K 18 PJ5 A O IC7 E LMC RETURN O 3 662 RETURN PJ5 BO R68 D39 i 3 PJ5 CO BAV99 47k RIG PJ5 DO ca 10K IK8 D4 TBS 5 115V6 PJ5 E O W35 V SEC PJ5 F 1 PRIMAUX sen C47 VQUT VOLTS MONITOR O PJ5 G O BV 1 IBAN R5747k R88 OVERCURRENT_1 50 EE PJ5 H O 3 LEDI OVERCURRENT _2 way TAG 15 OPTO2 BC849C REMOTE SENSE PJ5 J she VOUT d id H55 SOURCE i BVA 220 CHASSIS m 2 REMOTE SENSE Ra GND o R137 20 PE P BCB59C LED2 VOUT ICI5 B LM358M R99 Z BVSEC VOUT 39K 3 5V6 C72 50 44 CONTROL R89 10K VOUT QPX1200 POWER PCB Sheet 2 of 3 C55 57 7 IBN GATEI C61 C62 C63 7 1 GATE2 V SEC V SEC LT
30. PSUPPLY 8144 C93 C95 4 18 220 220 35V I6V ICH VOUT MIC4428 13 R128 f 1 22 4081 1 T 18 R69 ICia D 22 1 V SEC VOUT 8145 C86 C94 19 220 220 35V 16V 1 22N a32 BC849C VOUT MIC4428 R142 22 1 BCB49C MZE SKI 4 8143 E 22 D46 C66 BAV99 47P VOUT NOTE Pd NOT FITTED QPX1200 POWER PCB Sheet 3 of 3 BBB AAA 7805 v OP_ENAB
31. QPX1200 DC Power Supply Service Manual Manual Part Number 48511 1130 Issue 1 Specification EMC Safety General Circuit Descriptions Calibration Procedure Parts List Component Layouts Circuit Diagrams Table of Contents 17 19 35 37 Specification General specifications apply for the temperature range 5 C to 40 C Accuracy specifications apply for the temperature range 18 C to 28 C after 1 hour warm up with no load and calibration at 23 C Typical specifications are determined by design and are not guaranteed OUTPUT SPECIFICATIONS Voltage Range OV to 60V Current Range 0 01A to 50A Power Range Up to 1200W Voltage Setting Resolution 1mV Accuracy 0 196 of setting 2mV Current Setting Resolution 10mA Accuracy 0 396 of setting 20mA Operating Mode Constant voltage or constant current with automatic cross over provided that the power demanded stays within the power envelope see graph Outside of this envelope the output becomes unregulated CV CI or UNREG mode indication in display 60V QPX 1200 POWER ENVELOPE Volts 20V 0V 20A Amps 50A Output Switch Electronic with ON indication Preset voltage and current displayed when off Output Terminals Front panel safety terminals accepting 6mm wire diameter 6mm plugs or 8mm spades at 50 Amps max or 4mm plugs at 30 Amps max Duplicate rear panel terminals Sensing Switchable between local and remote Screwless
32. T SPACERS FOR TH2 FOR HEATSINKS PCB SUPPORT FOR 8 IC5 FOR D5 D6 D33 TH2 FOR D1 4 Q1 6 SK1 SK2 FIT TO PIN 1 OF FET Q1 6 FB4 9 FB1 3 T1 T9 L9 11 L5 7 L4 L8 L1 3 RL1 PCB ASSEMBLY PFC 44115 3100 continued Part Number 22312 0250 22315 0255 22455 0030 22455 0040 22482 0020 22520 0190 22573 0070 22573 0222 22573 0224 23185 0000 23207 4100 23207 4220 23210 4150 23222 0470 23222 1220 23271 0019 23274 0220 23274 0250 23275 0010 23385 3100 23386 0010 23388 0010 23424 0459 23424 0469 23424 0472 23424 0476 23557 0506 23557 0615 23557 0665 23557 0666 23557 0673 23557 0831 23557 0841 23557 0950 23620 0236 23620 0264 Description FUSE CLIP 0 25in PCB MTG FUSE 15A HRC 1 25 X 0 25 TAB 0 25in STR PCB MTG TAB 4 8MAX 0 8MM STR PCB MTG BEAD CERAMIC 11 54 3557 0 AC RECEP 10 15 AMP R A SOLDER UL HEADER 4WAY STR SIL STD HEADER 2 WAY STR F LOCK 156P HEADER 4 WAY STR F LOCK 156P RES ZERO OHM RES 100KJ 1W MF 250PPM RES 220KJ 1W MF 250PPM RES 150KJ 2W MF 250PPM RES 47R0J W33 MF FUSIBLE NFR25 RES 220RJ W33 MF FUSIBLE NFR25 RES 0R01J 2W MR RES 100RJ 7W WW STAND OFF RES 1K0J 4W WW RES 47R0J 3W MO RES PS H 10K CF 6MM VARISTOR V275LA20A THERMISTOR PTC TAG 90 DEG CAP 4N7 250V AC CER Y CAP 220PK 1KV CER P5 CAP 2N2K 1KV CER P5 P7 5 CAP 4N7M 250V CER Y1 X1 P10 CAP 10U 63V ELEC P2 CAP 470U 16V RE3 P3 5 CAP 2U2 50V ELEC RE2 P2 CAP 47U 63V ELEC RE2 P3 5 CAP 22U 35
33. T3 via Q13 Q15 Q17 Q18 and C35 The supply to the gate transformer drivers is decoupled by C17 C28 C29 C30 The gates of Q28 and Q29 receive their anti phase drive from the secondaries of T3 via R52 and R73 and respective anti parallel diodes D1 and D2 The output of the current transformer is full wave rectified by 016 017 022 023 and loaded with burden resistor R26 The voltage developed across R26 is utilised by two different circuits The first is to turn on Q11 via zener diode D27 when the current in the primary power switches exceeds a certain value determined by R157 and R158 Q11 collector charges C26 negatively via R21 When the voltage across C26 exceeds a threshold set by zener diode D10 latch 09 014 turns on and pulls signal SDWN down to the POV rail via D20 This in turn causes the power factor correction circuit to shut down requiring the removal of the mains supply in order to restart This would only happen under repeated short circuiting of the output Q9 Q14 latch can also be activated by the signal OPTO1 via R102 as would be the case when the voltage on the secondary exceeds a value set by zener diode D5 The primary heatsink is protected against excessive temperature by PTC TH3 which turns on Q16 and this in turn activates latch Q9 Q14 The voltage developed across R26 is also utilised to regulate the fan speed As the secondary loading increases the voltage across R26 is peak detected by D50 and C31 and se
34. V ELEC RE2 P2 CAP 10U 400V ELEC P5 CAP 47U 35V ELEC P2 CAP 4700 400V ELEC S I P10 CAP 1NOK 100V P E P5 CAP 100NK400VP E 368 SER P15 Position FS1 FOR FS1 W1 5 FAS5 6 FOR R2 R52 PJ3 PJ4 PJ2 PJ1 R92 R28 R55 R25 26 R1 R89 R86 R52 R2 R6 R9 R23 R4 R12 13 R15 16 R18 19 R21 22 VR1 VD1 TH2 C5 6 C11 14 C17 C22 24 C63 64 C47 C54 C69 C66 C59 C21 C49 C44 C67 C81 C34 C19 20 C42 43 C37 C46 27 PCB ASSEMBLY PFC 44115 3100 continued Part Number 23620 0267 23620 0268 23684 0016 23684 0023 23685 0013 25031 0150 25031 0200 25115 0910 25117 0040 25601 0740 27001 0060 27156 0030 27160 0013 27160 0032 31547 0750 Description CAP 100NK 100V P E P5 CAP 220NK400VP E 468 SER P15 CAP 220NM 250VAC X2 P22 5 UL CAP 2U2M 275VAC X2 P P UL CAP 330NK 160V 250V P P P15 DIO UF4006 DIO BYC10 600 DIO 1N4007 B R DIO 40EPS08 TRAN MOSFT NCHAN IRFPS37N50A OPTO COUPLER SFH615A 3 IC TOP244Y IC 7815 IC 7818 SCREEN ASSEMBLY SM PFC 44115 3101 Part Number 22469 1000 23105 0000 23105 0068 23105 0100 23105 0330 23105 0470 23105 1220 23105 2100 23105 2220 23105 2330 23105 2470 23105 3100 23105 3220 23105 3270 23105 3330 23105 3360 23105 3470 23105 4100 28 Description TEST POINT SMT RES 5 0805 ZERO OHM RES 5 0805 6R80F W1 RES 5 0805 10R0F W1 RES 5 0805 33R0F W1 RES 5 0805 47ROF W1 RES 5 0805 2
35. able shall be carried out only by a skilled person who is aware of the hazard involved If the instrument is clearly defective has been subject to mechanical damage excessive moisture or chemical corrosion the safety protection may be impaired and the apparatus should be withdrawn from use and returned for checking and repair Make sure that only fuses with the required rated current and of the specified type are used for replacement The use of makeshift fuses and the short circuiting of fuse holders is prohibited Do not wet the instrument when cleaning it The following symbols are used on the instrument and in this manual Earth ground terminal mains supply OFF mains supply ON alternating current ac 2 direct current dc General Service Handling Precautions Service work or calibration should only be carried out by skilled engineers using high quality test equipment If the user is in any doubt as to his competence to carry out the work the instrument should be returned to the manufacturer or their agent overseas for the work to be carried out The tracks on the printed circuit boards are very fine and may lift if subjected to excessive heat Use only a miniature temperature controlled soldering iron and remove all solder with solder wick or suction before attempting to remove a component Dismantling the instrument WARNING Disconnect the power supply from all voltage sources before it is opened for
36. an 18V rail for the PFC control ICA IC7 generates a 15V rail for the power pcb primary control circuit Secondary Side A 5V supply for the front panel keyboard is generated by IC9 This is an 8 pin SMD style device which incorporates the control circuitry and power switch to implement an off line flyback power supply It derives its power from the AUX HT line which is generated by D36 D37 and C81 C37 This rail is decoupled from the HT boost rail When the mains supply is switched off this AUX HT rail falls quickly and the front panel display vanishes very rapidly Start up Control Circuit D23 and R58 provide a 5 1V reference voltage to the negative inputs of all 4 op amps of IC8 When the mains is switched on potential divider R59 R59B R60 R60B and R61 feeds the attenuated full wave rectified mains voltage to the positive input of IC8 A The bulk storage capacitors C19 C20 are being charged via inrush current limiting resistor R2 When the mains voltage exceeds approximately 80Vrms the output of IC8A begins to produce pulses which charge C21 via D24 When the mains voltage reaches approximately 87Vrms the voltage on C21 exceeds the reference voltage on IC8 B negative input and the output of IC8 B goes high charging C55 C56 via R67 After a delay of about 0 4s the voltage on C55 C56 exceeds the reference voltage on IC8 C negative input and the output of IC8 C goes high turning on Q8 via 029 R74 thus energising RL1 whi
37. and connect the voltmeter from Vmonitor to Common Select option 5 from the Calibration menu Vmon measurement and press OK The unit now gives an output of about 1 Volt measure the voltage at Vmonitor and enter the output voltage this represents e g 6 times the voltage measured for the OV to 10V range to the nearest mV and press OK After a few seconds the output changes to about 50 Volts measure and enter the voltage represented by the voltage at Vmonitor to the nearest mV and press OK After a few seconds the display changes to the Calibration menu output voltage control is now calibrated 06 Vmon setting calibration On the rear panel terminals short Vmonitor to Vcontrol Ensure there is no load connected Select option 6 from the calibration menu Vmon setting and press OK The unit self calibrates during this time the output voltage will be switching between different levels After a few seconds the display changes to the Calibration menu output voltage monitor is now calibrated 17 07 measurement calibration On the rear panel terminals short Imonitor to Icontrol Ensure that there is no load connected to the unit and connect the voltmeter from Imonitor to Common Select option 7 from the Calibration menu Imon measurement and press OK The unit now gives an output of about 1 Amp measure the voltage at Imonitor and enter the output current this represents e g 5 times the current measu
38. ated it is because DC Output regulation may deviate beyond Specification limits under the test conditions However the possible deviations are still small and unlikely to be a problem in practice Note that if operation in a high RF field is unavoidable it is good practice to connect the PSU to the target system using screened leads which have been passed together through an absorbing ferrite sleeve fitted close to the PSU terminals Cautions To ensure continued compliance with the EMC directive observe the following precautions a after opening the case for any reason ensure that all signal and ground connections are remade correctly and that case screws are correctly refitted and tightened b In the event of part replacement becoming necessary only use components of an identical type see the Service Manual Safety This power supply is a Safety Class I instrument according to IEC classification and has been designed to meet the requirements of EN61010 1 Safety Requirements for Electrical Equipment for Measurement Control and Laboratory Use It is an Installation Category instrument intended for operation from a normal single phase supply This instrument has been tested in accordance with EN61010 1 and has been supplied in a safe condition This instruction manual contains some information and warnings which have to be followed by the user to ensure safe operation and to retain the instrument in a safe condition This instrum
39. ation Ensure there is no load connected to the unit Select option 2 from the Calibration menu Vout setting and press The unit self calibrates during this time the output voltage will be switching between different levels After a few seconds the display changes to the Calibration menu again output voltage setting is now calibrated 03 lout measurement calibration Connect the current measurement system directly across the front panel terminals Select option 3 from the Calibration menu lout measurement and press OK The unit now gives an output of about 1 Amp measure it accurately enter the actual current to the nearest mA and press OK After a few seconds the output changes to about 50 Amps measure and enter this to the nearest mA and press OK After a few seconds the display changes to the Calibration menu output current measurement is now calibrated 04 lout setting calibration Connect the current measurement system directly across the front panel terminals or alternatively connect a direct short circuit Select option 4 from the Calibration menu lout setting The unit self calibrates during this time the output current will be switching between different levels After a few seconds the display changes to the Calibration menu output current setting is now calibrated 05 Vmon measurement calibration On the rear panel terminals short to Vcontrol Ensure that there is no load connected to the unit
40. ch bypasses the current inrush resistor R2 The output of IC8 C also charges C58 via R70 thus producing a short delay before the output of IC8 D goes high and turns on Q9 which in turn switches Q10 and Q11 off When Q11 goes off the SS signal is no longer clamped to and allows the PFC control to start up When the mains voltage is switched off C21 is no longer supplied with top up pulses and is discharged by R64 IC 8 B output goes low and quickly discharges C55 C56 025 IC8 C output then goes low and immediately turns off Q9 via D28 This causes Q11 to come on clamping the SS signal to OV and stopping the PFC control IC8 B output going low discharges C58 via R71 and D26 thus providing a short delay before IC8 D output goes low and switches off the bypass relay driver Q8 The above timing sequences ensure that the inrush relay RL1 contacts only switch under zero load conditions Primary Boost stage Control circuit 10 The primary boost stage control is by means of IC4 This contains all the processing circuitry to shape the current taken by the power supply from the mains supply to be sinusoidal and in phase with the voltage For a detailed description refer to the ST Power Factor Corrector Applications Manual When the mains is switched on the 18V supply to IC4 pin19 is established and IC4 becomes active after a short delay when the SS signal is released by the start up control circuit During this sho
41. d PJ105 Remove the nuts which secure the front and rear output connecting cables from the terminals on the front panel Control board after noting their positions To release the Control board remove the 3 M3 screws to the front panel plus the 3 nuts which secure it directly to the amp earth terminals When re assembling do not forget the brass bus bar between the Red output terminal and the current measurement shunt connection 5 PFC Remove the 5V supply to the Keyboard at PJ2 and the mains connections at W1 W2 W3 amp W4 when reassembling note that W1 amp W4 to the front panel switch share ferrite sleeve and W2 amp W3 return from the switch share a ferrite sleeve Remove the 4 way primary AUX connection at PJ1 note the position of ferrite sleeve at the Power board end of the connection and the HT connection at FAS5 FAS6 amp W5 To release the PFC board from the chassis remove the 9 M3 screws with integral shakeproof washer from the underside of the chassis leaving the support pillars attached to the board assembly Ease the board forward a little in the chassis so that the safety earth connection to the rear panel can be undone and lift the board free Power Remove the 10 way connector PJS to the Control board noting polarity corner marker to pin1 remove the flat cable connection to PJ4 at the rear of the board remove the HT connection from the PFC board at FAS1 amp FAS2 remove the 4 way primary AUX c
42. e triangular signal at the base of Q23 together with the pulse at IC10 D pin 9 The reference voltage at the base of Q22 is coincident with the X axis in the centre of the oscilloscope screen To avoid uncontrolled post regulator conduction Q32 and associated components ensure that the Control signal is clamped to OV during initial power up The constant power limit is realised using analogue multiplier IC6 The output voltage and output current are monitored by IC5 A and IC5 B respectively the resultant signals fed to the Y and X inputs of the analogue multiplier The output of the multiplier is of the form X Y 10 Z Z is a third input and is used to modify the power limit to give a lower power limit at high output current The correction signal is generated by IC15 B The signal across the current sense resistors R12 R13 R14 R15 is fed into pin5 of IC15 B With the output current set to 20A the signal at pin 5 is nulled by the current in R91 VR4 from the negative voltage generated by zener 049 The null point setting is aided by comparator IC15 A which drives two LEDs the null being achieved when both LEDs are off Having nulled the voltage generated by the 20A output current in the current sense resistors the increasing current generates a voltage at the output of IC15B and this is fed to the Z input of the analogue multiplier The required level of correction is set by VR5 The supply rails for the front panel c
43. ect disconnect feature PJS provides a shared connection between the boards in the system Q2 and allow the processor to pull down the data line pin allowing it to go high only if none of the processors in the system want to pull low The firmware operates a master slave system to ensure there are no data clashes Calibration Procedure The QPX1200 calibration menu can be found under extra functions 99 The output calibrations are dependent on the measurement being in calibration so it is recommended that each of the calibrations be done in the order they appear on the menu Equipment Required Voltmeter capable of reading up to 65 Volts with 1mV accuracy and up to 15V with 100uV accuracy a Current measurement system capable of measuring 60 Amps with 10mA accuracy and resistance less than 100mQ e g a 4 terminal shunt Procedure 01 Vout measurement calibration Ensure that there is no load connected to the unit and connect the voltmeter directly across the front panel output terminals Select option 1 from the Calibration menu Vout measurement and press OK The unit now gives an output of about 1 Volt measure it enter the actual voltage to the nearest mV and press OK After a few seconds the output changes to about 50 Volts measure and enter this to the nearest mV press OK After a few seconds the display changes to the Calibration menu again output voltage measurement is now calibrated 02 Vout setting calibr
44. ent has been designed for indoor use in a Pollution Degree 2 environment in the temperature range 5 C to 40 C 20 80 RH non condensing It may occasionally be subjected to temperatures between 5 C and 10 C without degradation of its safety Do not operate while condensation is present Use of this instrument in a manner not specified by these instructions may impair the safety protection provided Do not operate the instrument outside its rated supply voltages or environmental range WARNING THIS INSTRUMENT MUST BE EARTHED Any interruption of the mains earth conductor inside or outside the instrument will make the instrument dangerous Intentional 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 be live and opening the covers or removal of parts except those to which access can be gained by hand is likely to expose live parts The apparatus shall be disconnected from all voltage sources before it is opened for any adjustment replacement maintenance or repair Capacitors inside the power supply may still be charged even if the power supply has been disconnected from all voltage sources but will be safely discharged about 10 minutes after switching off power Any adjustment maintenance and repair of the opened instrument under voltage shall be avoided as far as possible and if inevit
45. ient load changes Pin 8 is the output of the multiplier and is the programming current for the internal current error amplifier This signal is taken to the mains supply side of the current sense resistor R52 via R48 The other input of the current error amplifier is taken to the other side of R52 via R50 The current error amplifier thus compares the signal across the current sense resistor R52 with the programming current and adjusts the PWM drive to the boost MOSFETSs accordingly R49 and C42 with R50 form the compensation network around the current error amplifier Boost Stage Three boost inductors L5 L6 L7 are each driven by a pair of MOSFETs Q3 Q6 02 05 Q1 Q4 respectively to raise the incoming full wave rectified sinusoidal mains voltage to a value some 30V higher than the peak of the maximum rms input voltage This is achieved by storing energy in the boost inductors when the MOSFETs are conducting and transferring it to C19 C20 via boost diodes 05 06 D33 when the MOSFETs are turned off When the MOSFETSs turn on the boost diodes D5 D6 D33 are still conducting current To prevent large switch on losses delay inductors L9 L10 L11 are placed in series with the MOSFETs This ensures that the current in the boost diodes is reduced at a gradual rate and the reverse recovery time is minimised at the same time as the drain voltage of the MOSFETs is allowed to fall rapidly The energy stored in L9 L10 L11 is transferred to C18 C6
46. lso external demand signals for pseudo analogue control This is achieved via 402 an analogue to digital converter 101 provides a clean buffered reference This chip communicates with the processor via an SPI bus IC107c provides over voltage protection It compares the OVP limit set by IC108d with the output voltage When the output voltage becomes excessive it latches pulling the voltage demand to zero via Q111 and Q112 The processor can reset the latch via Q113 Remote Sense RL100 selects between remote and local sensing controlled by the processor via Q109 Q106 and Q107 sense excessive drop down the sense cables indicating a sense fault to the processor via Q105 if appropriate Logic in and Logic Out The system has input and output logic signals which communicate with the processor via buffer transistors Q100 and Q101 Keyboard The keyboard processor IC2 acts as the system master initiating all communications within the unit it is programmed in circuit using the standard JTAG port accessed at PJ3 PJ9 and PJ10 provide the connections to the other boards in the system Q2 and 5 enable the processor to pull down the data line allowing it to go high only if none of the processors in the system want to pull it low The firmware operates a master slave system to ensure there are no data clashes The board is supplied with 5V from the PFC board via PJ4 This is used to generate a local 3 3V supply 4 and 1 95V s
47. nti phase An auxiliary centre tapped winding on the converter transformer T1 terminated on pins 21 22 23 24 generates the V SEC and 8VSEC rails for the secondary control circuitry and also the reference pulses AAA and BBB for the post regulator control circuit This description refers to the upper channel on sheet 3 The reference pulse AAA is buffered and squared by AND gate IC10 B The output of the AND gate charges and discharges capacitor C58 via R66 The discharge time is shorter due to R69 and D41 conducting The resultant triangular waveform is shown in photograph 03 The long tail pair LTP comparator Q22 amp Q23 switches when the triangle waveform at Q23 base exceeds the reference voltage on Q22 base The Control voltage from IC7 A is fed to the base of Q21 via R75 and VR3 The pulse width of the two sides is balanced by adjusting VR3 Q21 emitter sets a pedestal level from which the charging of C58 begins The higher this pedestal level the quicker C58 charges to the reference level on Q22 base and the LTP comparator switches This in turn switches Q20 which delivers a pulse to AND gate IC10 D where it is gated with the AAA reference signal the trailing edge of which has been slightly delayed by R71 and C59 The output of the AND gate IC 10 D drives a MIC4428 driver IC the antiphase outputs of which drive the gate of the synchronous post regulator MOSFET 02 via gate drive transformer Photograph 04 shows th
48. oad Huntingdon Cambridgeshire PE29 7DR England Telephone 44 0 1480 412451 Fax 44 0 1480 450409 e mail sales tti test com International website www tti test com UK website www tti co uk
49. onnection from the PFC board at PJ1 remove the 3 2 way fan power connections PJ6 PJ7 PJ8 remove the 2 M6 barb nuts which secure the output cables to the front panel To release the Power board from the chassis it is first necessary to remove the 3 internal fan push out the centres of the 2 plastic push rivets which secure the top of the fan to the bracket and lift out the fan with its lower bracket still attached When re assembling note that the fan label faces the transformer airflow towards the transformer Remove the 10 M3 screws with integral shakeproof washer from the underside of the chassis leaving the support pillars attached to the board assembly and lift the assembly forward and up Interface Remove the 3 way connection to the Keyboard at PJ3 The Interface board is secured only by the RS232 screwjacks undo these to release the board When reassembling take great care to ensure that all connections are exactly as before dismantling and that no insulation creepage and clearance distances have been compromised Ensure that only the correct fasteners have been used otherwise earthing and hence EMC and safety performance may be impaired Circuit Descriptions PFC Board Mains Input Filtering and Rectification The AC input is via PJ3 a pcb mounted IEC plug and fuse FS1 X capacitors C1 C4 C7 C10 amp C68 together with the Y capacitors C5 C6 C11 C12 common mode inductors L1 L2 amp L3 and differential induc
50. ontrol circuit are generated from an auxiliary winding on the converter transformer T1 terminated on pins 13 and 14 A V rail of approximately 10V is generated by 033 034 and filter L4 C40 A 15V rail is generated by 035 C43 R51 036 A 8V rail Is generated by 038 C44 R55 and 037 Photograph 1 Photograph 2 13 Photograph 3 Photograph 4 Control Board The control board contains an ARM7 processor 111 programmed via JTAG header PJ103 three processors communicate via a shared bus but in this case it is isolated via opto couplers IC109 and 110 The board needs several power supplies and with the exception the 8V and 15V rails these are all derived from the V rail generated on the Power board and connected to the Control via PJ100 117 generates 5 volt rail which is used to generate 3 3V via IC112 and finally IC113 generates a 1 95V supply for the processor core In addition IC107d provides power fail signal that ensures that data is saved at each power off Regulation 14 output current is sensed via shunt R143 and the signal amplified via 1C116 This is fed into the AID converter IC102 and also into IC115c where it is compared against the demand to regulate the current Similarly IC115a and IC115d regulate the output voltage with the two loops having a diode OR connection to give a clean crossover between constant voltage and constant power modes
51. red for the OV to 10V range to the nearest mA and press OK After a few seconds the output changes to about 50 Amps measure and enter the current represented by the voltage at Imonitor to the nearest mA and press OK After a few seconds the display changes to the calibration menu output voltage control is now calibrated 08 Imon setting calibration 18 On the rear panel terminals short Imonitor to Icontrol Connect the current measurement system directly across the front panel terminals or alternatively connect a direct short circuit Select option 8 from the calibration menu Imon setting and press OK The unit self calibrates during this time the output current will be switching between different levels After a few seconds the display changes to the Calibration menu output current monitor is now calibrated PCB ASSEMBLY POWER 44115 3060 Part Number 20205 0800 20234 0023 20234 0100 20613 0007 20613 0026 20661 0225 20670 0135 20670 0310 20670 0340 20670 0364 20670 0365 20670 0550 20670 0560 22040 0940 22109 0130 22109 0280 22109 0370 22109 0400 22154 0160 22154 0770 22154 0780 22455 0040 22467 0130 22482 0020 22573 0086 22573 0210 22573 0224 22573 0247 22575 0038 23185 0000 23202 0100 23202 0270 23202 1100 23202 2330 23202 5680 Description STUD M6 x 20 HFHB M6 20 X SCREW 4 x 8 PNHDPZ ZPST SCREW x 6PNHDPZ C W EXT SH P SIL PAD TO220 PLAIN SIL PAD 900S 100MM X 25MM SPACER Hex M3
52. rt delay the bulk storage capacitors C19 C20 are charged via the inrush limiting resistor R2 IC4 starts up and supplies drive pulses to the gate ICs IC1 IC2 IC3 which drive the gates of the boost MOSFETs Q1 Q2 Q4 Q5 Q6 C44 is connected to the soft start pin of ICA and provides a soft start R34 R34b R35 R35b R37 C35 C35b C36 C36b form a two stage RC filter to feed a voltage proportional to the mains voltage to IC4 pin 7 which after an internal 1 V transformation is fed to the internal multiplier For a universal mains input the voltage at this pin will vary between 1 5V and 5 5V R38 R38a and R39 R39a supply a current derived from the full wave rectified mains voltage to IC4 pin 4 to be used by the internal multiplier Also fed to the internal multiplier is the output of the voltage error amplifier of IC4 pin 13 The input to the error amplifier at pin 14 is from potential divider R41 R41b R42 R42b R62 R63 and VR1 This potential divider monitors the voltage on the boost stage output capacitors 019 C20 and this is compared to an accurate internal reference voltage Thus a steady voltage of about 395V as set by VR1 is maintained across C19 C20 Another potential divider R44 R44b R45 R45b R46 monitors the voltage across C19 C20 and feeds into pin 3 of IC4 which is the over voltage shutdown C80 slows the signal going into the over voltage pin to prevent the over voltage circuit from activating during trans
53. scription INSTRUMENT FOOT FERRITE SLEEVE APPX 8 16 14L FERRITE SLEEVE 31x19lDx16L SWITCH ROCKER DPDT 16A 250V RECEPT RED FEMALE 4 8x0 8MM MAINS LD 2MST IEC SKT EURO PL MAINS LD 2M ST IEC UK PLUG 13A PIN ANTI ROTATION TP 44 amp 244L TERMINAL TP60 BLACK BLACK 25MM TERMINAL TP60 RED BLACK 25MM TERMINAL PSU SAFTY GREY GREY SKT 2 WAY IDT 1P SKT 3 WAY IDT 1P SKT 2W 156 20AWG Yellow IDT SKT 4W 156 20AWG Yellow IDT SKT 10W 156 20AWG Yellow IDT FAN 80 24VDC 3000RPM BRACKET WIRE SUPPORT BRACKET FAN SUPPORT BEZEL FOOT TILT HOUSING FOOT TILT SUPPORT FRONT PANEL REAR PANEL OVERLAY FRONT PANEL CASE LOWER CASE UPPER KEYCAP 8 x 4 5MM LIGHT GREY F R KNOB ENCODER LIGHT GREY CONN ASSEMBLY 16WPWR CNTL INSTRUCTION MANUAL 48511 1040CD CD INSTRUCTION DRIVERS Position BACK FEET SAFETY EARTH PFC TO POWER AUX MAINS TO FRONT PANEL 2 PFC TO KEYBOARD POWER TO CONTROL AUX POWER TO FRONT TERMINALS FRONT TO REAR TERMINALS POWER TO PFC WIRES F PANEL R PANEL F PANEL R PANEL F PANEL FOR INTERNAL FAN PJ5 CNTL TO PJ9 KEYBOARD PJ10 KEYBOARD PJ4 ON KEYBOARD PFC TO POWER POWER PJ10 CNTL REAR PANEL 2 INTERNAL FOR INTERNAL FAN 33 Part Number 20010 0254 20010 0255 20010 0257 20030 0271 20037 0301 20037 0304 20037 0305 20038 9502 20063 0010 20065 0070 20210 0101 20210 0110 20210 0111 20210 0130 20213 0040 20234 0016 20234 0023 20234 0028 20234 0100
54. that is activated at an input current greater than approximately 1mA User can set LOGIC IN via the keyboard to enable the output disable the output or be ignored when it is activated LOGIC OUT is an isolated rear panel open collector output that will sink up to 2mA when activated switch closure the maximum voltage that can be applied to LOGIC OUT is 30VDC User can set LOGIC OUT to be closed or open for output enabled or disabled current limit CI mode power limit UNREG mode or for any fault trip ANALOG REMOTE CONTROL and MONITORING Non isolated inputs and outputs to set voltage and current limit and to monitor actual output voltage and current These signals are referenced to the positive output and have a range of 0 to 10V or 0 to 5V selectable via the keyboard Analogue Control Accuracy X Voltage 0 3 4mV Current 0 596 40mA Analogue Monitor Accuracy X Voltage 0 3 4mV Current 0 5 40mA KEYBOARD amp ROTARY CONTROL All functions including the selection and set up of the remote control interfaces can be set from the keyboard The rotary Jog control can be used to adjust output voltage and current settings in a quasi analogue mode DISPLAY FEATURES The display is a 240 x 64 pixel transflective LCD backlit by white LEDs contrast is software controlled and can be adjusted from the keyboard The default status display shows the VOLTS 5 digits and AMPS 4 digits in 10mm high characters pl
55. tors L4 amp L8 comprise an input filter which ensures that the supply meets both conducted emission and conducted immunity EMC requirements VD1 clips mains spikes for component protection while R1 discharges the X capacitors after removal of the mains supply Pcb mounted fuse FS1 limits damage on boost stage or forward converter failure The front panel mains switch is connected via connectors W1 W2 W3 and WA The bridge rectifier comprised of D1 D2 D3 and D4 has C13 and C14 connected across it to bypass noise signals and to snub reverse recovery transients in the bridge rectifier C15 C16 further decouple the input filter and rectifier from the boost converter R2 limits the initial inrush current into the boost stage output capacitors C19 and C20 and is by passed by relay PL1 once the boost converter starts Auxiliary Supplies Primary Side The primary auxiliary supplies are generated by IC5 This is a 7 pin TO220 style device which incorporates the control circuitry and power switch to implement an off line flyback power supply It derives its power from the boosted HT rail R93 sets the power switch peak current to 0 4A D20 R55 and C47 clamp the drain voltage of the power switch at a safe level The low voltage output of transformer T9 is peak rectified by D21 and C49 The output voltage is regulated to 24V by zener diode D22 and feedback to the control pin is via opto coupler IC15 The 24V rail powers the fans IC6 generates
56. ts a demand 11 voltage level at the positive input of op amp 14 the output of which turns on fan drive transistor Q38 The fan current is monitored by R120 R121 and amplified by IC14 B to provide negative feedback to the negative input of IC14 A Secondary Side 12 The main secondary winding is centre tapped and terminates on pins 19 20 15 16 with the centre tap on 17 18 Snubber networks R7 C13 and 14 R18 across each half reduce high frequency ringing D47 and C80 generate a negative rail which bleeds a negative current from the output via resistors R131 and R132 The voltage on the secondary winding is rectified by 047 8 D11 L C filtered by L1 C5 C7 C8 11 with flywheel diodes D6 amp D7 and fed to a linear output stage comprised of MOSFETs Q3 Q4 Q6 To minimise power dissipation in the linear output stage the voltage across the MOSFETS is monitored by error amplifier IC7 A Sheet 2 which maintains the voltage across the linear output MOSFETs to below 1V by adjusting the Control signal to the synchronous post regulator MOSFETs drive circuit Sheet 3 The synchronous post regulator MOSFETs Q2 and Q8 regulate the voltage across the linear output MOSFETS by initially blocking the pulse from the secondary winding and only conducting after a delay determined by the Control signal Referring to Sheet 3 the drive to the post regulator MOSFETS is generated by two identical circuits operating in a
57. upply IC3 IC7a together with Q1 and associated components provide current source for the display LED backlight IC7b and associated components provides a crude under voltage detect to ensure the processor starts shuts down cleanly IC6 is a simple latch for the LEDS and the keyboard is scanned directly by the processor this is a quiet scan that only scans when keys buttons are pressed or released not when the keys are left open or held down The diodes D1 to D4 allow the processor to use some pins for two purposes key scan and LED The display is a 240x64 pixel LCD mounted directly on the keyboard PCB and connected via PJ6 The display contains its own voltage multiplier to generate the required bias levels the switched capacitors and decoupling are provided directly on the pins of the display connector 15 Interface Board 16 The interface board allows the unit to communicate externally via USB or RS232 IC5 is an ARM7 processor which is programmed in circuit using the standard JTAG port accessed at PJ5 IC3 and IC6 generate the required supply rails PJ3 provides an RS232 connection IC1 and IC2 provide the necessary level shifting and inversion to convert the UART s mark and OV space to RS232 s 5V mark and 5V space They also allow for data to pass through from one unit to another for TTi s Addressable RS232 Chain ARC USB is controlled directly by the processor Q1 switches R22 to provide a soft conn
58. us the present output mode At other times for example during store or recall of instrument set ups the display shows up to 6 lines of information instructions or prompts INTERFACES Full digital remote control facilities are available through the RS232 and USB interfaces Setting and readback resolutions are the same as the Output and Meter specifications respectively RS232 USB Remote Command Processing Time GENERAL AC Input Power Consumption Operating Range Storage Range Environmental Store Recall Safety EMC Size Weight Options Variable Baud rate 19200 Baud maximum 9 pin D connector Single instrument or Addressable RS232 operation Standard USB 2 0 hardware connection Typically lt 100ms between receiving the command terminator for a step voltage change at the instrument and the output voltage beginning to change 110V 240V AC 10 50 60Hz Installation Category Il 1600VA max 5 C to 40 C 20 to 80 RH 409 to 70 C Indoor use at altitudes up to 2000m Pollution Degree 2 Up to 10 set ups can be saved and recalled via the keyboard or remote interfaces Complies with EN61010 1 Complies with EN61326 130mm H 3U x 356mm W x 413mm D 9 2kg 19 inch rack kit EMC This instrument has been designed to meet the requirements of the EMC Directive 89 336 EEC Compliance was demonstrated by meeting the test limits of the following standards Emissions
59. x 12 NPBR CLIP GP02 FOR PCB H SINKS HEATSINK PCB MTG 38MM PLAIN HEATSINK TO220 CLIPON 29DEG W CLIP MAX01H FOR TO220 MAX H S CLIP MAX03H FOR TO247 MAX H S HEATSINK MAX505 90MM PLAIN HEATSINK MAX505 210MM PLAIN BEAD DOUBLE FERRITE TRANSFORMER GATE DRIVE TRANSFORMR CURRENT SENSE TRANSFORMER HF POWER TRANSF GATE DRIVE QPX POSTREG CHOKE 1mH AXIAL 1 3 OHMS CHOKE OUTPUT QPX CHOKE 3uH ZVS TAB 4 8MAX 0 8MM STR PCB MTG TERMINAL BLOCK 2W R A BEAD CERAMIC 11 54 3557 0 HEADER 16W 2x8 LATCHING HEADER 10 WAY STRAIGHT 156P HEADER 4 WAY STR F LOCK 156P HEADER 2 WAY STR 1P F LOCK HEADER 6 WAY STR SIL RES ZERO OHM RES 10R0F W60 MF 50PPM RES 27R0F W60 MF 50PPM RES 100RF W60 MF 50PPM RES 3K30F W60 MF 50PPM RES 6M80F W60 MF 50PPM Parts List Position OUTPUT CONNECTION HEATSINKS PCB SUPPORT SPACERS FOR TH1 FOR HEATSINKS PCB SUPPORT SK3 SK4 FOR TH1 TH3 FOR 2 6 Q8 028 029 D3 D6 7 D11 SK1 SK2 FB1 7 T3 CTI T1 T4 5 L3 4 L1 L2 FAS1 2 TB1 6 FOR R12 15 PJ4 PJS PJ1 FIT PIN 1 TO PIN 1 PJ6 8 5 R155 R156 R37 R41 R52 R73 R45 R2 R4 6 R49 R33 34 R27 28 19 PCB ASSEMBLY POWER 44115 3060 continued Part Number 23210 0330 23210 1100 23210 1220 23210 2470 23210 3470 23215 2100 23222 0022 23222 0220 23222 0220 23222 1220 23274 0042 23274 0043 23274 0320 23275 0010 23385 2100 23385 3100 23385 3470 23388 0010 23424 0469 23424 047
Download Pdf Manuals
Related Search