TTI QL II Series Service Manual
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TTI QL II Series Service Manual

Precision power supplies
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QL Series II
Precision Power
Supplies
Service Manual
Book Part Number 48511-1740 - Issue 1

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Summary of Contents for TTI QL II Series

  • Page 1 QL Series II Precision Power Supplies Service Manual Book Part Number 48511-1740 - Issue 1...

  • Page 2: Table Of Contents

    Table of Contents Specification Safety General Circuit Descriptions Calibration Parts List Interconnection Diagram Component Layouts Circuit Diagrams...

  • Page 3: Specification

    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. MAIN OUTPUTS Voltage/Current Ranges: QL355...
  • Page 4 Over-voltage Protection: Range 1V to 40V (QL355), 1V to 60V (QL564) (OVP) Resolution 0·1V; accuracy ± (2% + 0·5V) Response time typically 100µs Over-current Protection: Range 0·01A to 5·5A (QL355), 0·01A to 4·4A (QL564) (OCP) Resolution 0·01A; accuracy ± (0·2% + 0·01A) Response time typically 35ms Protection Functions: Output trips off for OVP, OCP, over-temperature and Sense miswiring...
  • Page 5 DIGITAL INTERFACES (P models only) Full digital remote control facilities are available through the RS232, USB, LAN and GPIB interfaces. General RS232: Standard 9-pin D-connector. Variable Baud rate (600 to 19200). GPIB: Conforming with IEEE488.1 and IEEE488.2 USB: Standard USB 2.0 hardware connection. Operates as a virtual COM port. LAN: Ethernet 100/10base-T hardware connection.

  • Page 6: Safety

    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 II instrument intended for operation from a normal single phase supply.

  • Page 7: General

    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. Please note the following points before commencing work.

  • Page 8: Circuit Descriptions

    Circuit Descriptions The Power board contains the main power supply and the auxiliary supplies used internally, the output series regulator transistors, the microcontroller, display drivers and some control logic. The Control board contains voltage and current control, ADC and DAC and some control logic. The linear regulator is in series with the positive output but, because of the way in which the control circuit is referenced to the +ve output, it is convenient to consider the regulated output as the negative side.
  • Page 9 Jumpers are fitted to SEL1 to 7 to inform the microcontroller of the model type and to LK1 and LK2 to power the opto-couplers, see table below. SEL1 SEL2 SEL3 SEL4 SEL5 SEL6 SEL7 QL355 QL355P QL355T output 1 QL355T output 2 QL355TP output 1...
  • Page 10 IC37 is a 12-bit ADC; ADREF is adjusted for voltage and current measurements and is approximately 4V. IC27B has a gain of –2; therefore if, for example, VM was –2V then the output of IC27B would be +4V. Offsets are trimmed by ADOFST. To achieve 13-bit resolution two measurements are taken with and without the 13 bit subtracted from the input selected by IC24C.

  • Page 11: Calibration

    Calibration Refer to the General section for dismantling instructions and safety precautions. Normal calibration is done without opening the instrument. Allow 10 minute warm-up before commencing calibration. Refer to the User Manual for detailed operation of these power supplies. Equipment Required A 5.5 digit multimeter with better than 0.02% accuracy on dc volts and better than 0.12% accuracy on dc current (to 5A);...
  • Page 12 14, 35V 500mA 2V 400mA 400mA ± 0.05mA ammeter o/p mA span 15, 35V 500mA 2V 400mA 400.0 on display ammeter mA readback span 16, 35V 500mA 2V 410mA 410.0 on display ammeter mA readback 13bit 17, Aux o/p 5.00V ± 10mV o/p V span 18, Aux o/p 5.00V on display...

  • Page 13: Parts List

    Parts List PCB ASSEMBLY – POWER – QL355 Part No. Description Position 20073-9801 SCREW No.4x1/4in. Plastite HEATSINKS 20613-0026 SIL-PAD 900S 100MM X 25MM FOR HS1, HS2 20670-0366 HEATSINK LS01000 100MM PLAIN SK1-2 20670-0367 CLIP 1 FOR TO220/TO247 H/S FOR IC1-3,Q22,SCR1-2,BR1,Q15,Q16 22240-0150 RELAY 12V DPDT 8A RL1-2...
  • Page 14 PCB ASSEMBLY – POWER – QL355 continued/… Part No. Description Position 25211-9302 RECTIFIER BRIDGE W02G BR2-3 25386-9300 TRAN NPN TIP31A 25601-0590 TRAN MOSFET NCHAN HUF75639G3 Q15-16 27001-0020 OPTO-COUPLER CNY17-3 0.3 UL IC44 ,IC52 27001-0050 OPTO-COUPLER 6N136 IC48-49 27001-0110 OPTO-COUPLED TRIAC 3011 IC4-5 27160-0009 IC V/REG 7805 TO220...
  • Page 15 PCB ASSEMBLY – SM POWER – QL355 and QL564 continued/… Part No. Description Position 23105-4220 RES SM0805 220KF W1 R14-15 ,R143 23105-5100 RES SM0805 1M00F W1 R10, R31, R115 ,R135 23407-0100 CAP SM0805 10PG CER NPO C56-57 23407-0101 CAP SM0805 100PG CER NPO C21-22 23461-0020 CAP SM0805 100NZ 50V CER Y5V...
  • Page 16 PCB ASSEMBLY – POWER – QL564 continued/… Part No. Description Position 22315-0452 FUSE 1.0AT SUBMIN PCB MTG UL 22573-0041 HEADER 2WAY STR SIL STD/GOLD LK1-3, TP1, TP5, TP2-4 (1 PIN EACH) 22573-0071 HEADER 5 WAY STR SIL STD 22573-0150 HEADER 20 WAY STR LATCHING PJ10-11 22573-0225 HEADER 5 WAY STR F/LOCK .156...
  • Page 17 PCB ASSEMBLY – POWER – QL564 continued/… Part No. Description Position 28500-1190 XTAL 18.432MHZ MICROPROCSR XTL1 44117-0181 PCB ASSY SM POWER nQL355 PCB ASSEMBLY – CONTROL Part No. Description Position 10300-0313 PAD P/E S/AD 12 X 15MM FOR R50 22240-0070 RELAY TYPE 47 (12VDC) 22455-0040 TAB 4.8MAX 0.8MM STR PCB MTG...
  • Page 18 PCB ASSEMBLY – CONTROL continued/… Part No. Description Position 23427-9205 CAP 47PJ 100V CER NPO P2.5 C44-48, 62, 72, 74-78 23428-0100 CAP 10PG 100V CER NPO P2.5T 23557-0500 CAP 1U0 50V ELEC P1.5 23557-0647 CAP 10U 35V ELEC P2 C24, 25, 27, 53, 58, 60 23557-0694 CAP 220U 100V ELEC P5 C40,41...
  • Page 19 PCB ASSSEMBLY - INTERFACE Part No. Description Position 20010-0205 RIVET ALUM 2.4W X 6L PCB fixing(1) 20010-0208 RIVET ALUM 2.4W X 8L FOR PJ10(2) 20040-9501 NUT No.4 Angle PCB fixing 20210-0112 NUT M3 BARB FOR IC15 20234-0011 SCREW M3 X 10 PNHDPZ ZPST FOR IC15 20613-0006 SIL-PAD TO220 LARGE HOLE...
  • Page 20 PCB ASSEMBLY – SM - I/F – LAN/USB/RS continued/… Part Number Description Position 23105-2150 RES SM0805 1K50F W1 R20,R63 23105-2220 RES SM0805 2K20F W1 R4,R6,R33,R38-39,R43,R54,R62 23105-2487 RES SM0805 4K87F W1 23105-3100 RES SM0805 10K0F W1 R2,R8,R13,R16-18,R24,R29-30,R35- 36,R41,R48-49 23105-3470 RES SM0805 47K0F W1 R37,R47 23105-4100 RES SM0805 100KF W1...
  • Page 21 PCB ASSEMBLY – KEYBOARD SINGLE continued/… Part Number Description Position 25061-0300 LED - SM - RED 3.2 X 2.8MM LED1, LED3-8, LED11, LED15,LED20, LED24 25061-0301 LED - SM - YELLOW 3.2 X 2.8MM LK17,18,19, 21, 22, 23 25061-0302 LED - SM - GREEN 3.2 X 2.8MM LED2 25061-1000 DISPLAY SET QL .56 LED 9MM LEG...
  • Page 22 PCB ASSY - AUX TERM/POWER continued/… Part Number Description Position 22219-0500 SWITCH 2 POLE MOMENTARY 22315-0457 FUSE 3.0AT SUBMIN PCB MTG UL 22467-0130 TERMINAL BLOCK 2W R/A 22573-0071 HEADER 5 WAY STR SIL STD 22573-0206 HEADER 6 WAY STRAIGHT .156P PJ4 (REVERSE MOUNTED) 22573-0224 HEADER 4 WAY STR F/LOCK .156...
  • Page 23 PCB ASSEMBLY – SM AUX TERM/POWER continued/… Part No. Description Position 23105-3430 RES SM0805 43K0F W1 R19, R21 23105-4100 RES SM0805 100KF W1 R1, R13, R33-34, R41 PCB ASSEMBLY – SM AUX TERM/POWER Part No. Description Position 23407-0470 CAP SM0805 47PG CER NPO C11, C14, C16 23414-3226 CAP SM1210 22UK 16V CER...
  • Page 24 MECHANICAL ITEMS - QL355 & QL355P - UNPACKED PARTS LIST continued/… Part No. Description Position 22571-1150 TERM PSU SAFETY:REAR INS YEL 22571-1210 TERM PSU SFTY2 28L SPINDLE GRY 22571-1220 TERM PSU SAFETY2:TOP INS RED 22571-1230 TERM PSU SAFETY2:TOP INS BLK 22571-1240 TERM PSU SAFETY2:TOP INS GREY 22575-0009...
  • Page 25 MECHANICAL ITEMS - QL355 & QL355P - UNPACKED PARTS LIST continued/… Part No. Description Position 44117-0220 PCB ASSY LAN/USB/232/GPIB 44117-0230 PCB ASSY - KEYBOARD - QL355-P U 46117-0010 FIXINGS & FASTEN QL355/564 47511-0020 KEYPAD - QL SINGLE FIXINGS AND FASTENERS PARTS LIST QL355/355P QL564/564P Part No.
  • Page 26 MECHANICAL ITEMS - QL355T & QL355TP UNPACKED PARTS LIST continued/… Part No. Description Position 20620-0010 CLIP - ENCODER KNOB 20651-0018 CLAMP CABLE 11.1 X 4.8 AUX RIBBON CABLE FIXING (REAR MOUNT) 20661-0290 SPACER Clr No.4 X 22.2mm Nylon POWER TOP 20661-0610 SPACER PCB SUPPRT 1/2 INCH NY AUX PCB...
  • Page 27 MECHANICAL ITEMS - QL355T & QL355TP UNPACKED PARTS LIST continued/… Part No. Description Position 33533-0430 LENS - DISPLAY - QL 33533-0440 WINDOW - DISPLAY - QL 33536-4303 COVER PAINTED QL TRIPLE GREY3 33536-4360 CHASSIS - PRINTED QL TRIPLE 33536-4840 CHASSIS - PRINTED QL TRIPLE P 37113-2113 BUTTON 6.5D X 9.4L GREY3 FRONT PANEL...
  • Page 28 FIXINGS AND FASTENERS QL355T/TP QL564T/TP continued/… Part No. Description Position 20210-0112 NUT M3 BARB Barrier block(4), Remote sense 20213-0010 CAPTIVE NUT SNU-1219-17-00 20213-0040 CAPTIVE NUT SPIRE NO.6 Chassis 20234-0016 SCREW M4 X 16 PNHDPZ ZPST Feet 20234-0025 SCREW M3 X 12 PNHDPZ ZPST Barrier block 20234-0028 SCREW M4 X 10 PNHDPZ ZPST...
  • Page 29 MECHANICAL ITEMS – QL564T & QL564TP UNPACKED PARTS LIST continued/… Part No. Description Position 22571-1150 TERM PSU SAFETY:REAR INS YEL 22571-1210 TERM PSU SFTY2 28L SPINDLE 22571-1220 TERM PSU SAFETY2:TOP INS RED 22571-1230 TERM PSU SAFETY2:TOP INS BLK 22571-1240 TERM PSU SAFETY2:TOP INS GREY 22575-0009 SHORTING BLOCK MASTER SEL3 (1), SLAVE LK1 (1), SLAVE...
  • Page 30 MECHANICAL ITEMS – QL564T & QL564TP UNPACKED PARTS LIST continued/… Part No. Description Position 43187-2060 WIRE SET CUT QL-T r/TERMS UL 44117-0020 PCB ASSY - CONTROL - QL355 44117-0070 PCB ASSY - TERMINAL - QL355 U 44117-0090 PCB ASSY - KEYBOARD -QL355T U 44117-0130 PCB ASSY IEC 230V QL355T/TP 44117-0190...
  • Page 31 MECHANICAL ITEMS - QL564/564P UNPACKED PARTS LIST continued/… Part No. Description Position 28522-0050 FAN 80MM 12VDC (QL) UL SP 31512-0830 BRACKET R/PANEL TO PCB QL 31512-0880 BRACKET F/PANEL TO CHASS QLS 31512-1070 BRACKET - FAN SUPPORT - QL S 33111-0280 BRACKET HANDLE - PSU UNIVERSAL 33143-0293 FOOT - TILT - HOUSING GREY3...
  • Page 32 Block Diagram...

  • Page 33: Interconnection Diagram

    Interconnection Diagram SINGLE PSU TRIPLE PSU...

  • Page 34: Component Layouts

    Component Layouts CONTROL PCB...
  • Page 35 POWER PCB...
  • Page 36 MAIN TERMINAL PCB AUXILIARY POWER PCB (TRIPLE ONLY)
  • Page 37 INTERFACE PCB...
  • Page 38 KEYBOARD/DISPLAY PCB (SINGLE)
  • Page 39 KEYBOARD/DISPLAY PCB (TRIPLE)

  • Page 40: Circuit Diagrams

    Circuit Diagrams AC SUPPLY CONNECTION PCB MAIN OUTPUT FRONT PANEL TERMINAL PCB...
  • Page 41 QL SERIES II - POWER PCB - Sheet 1 of 2...
  • Page 42 QL SERIES II - POWER PCB - Sheet 2 of 2...
  • Page 43 Control Pcb Sheet 1 of 2 DAC, ADC Sample & Hold ccts, error logic.
  • Page 44 Control Pcb - Sheet 2of 2 Voltage & Current Control, OVP & Sense fault trip.
  • Page 45 QL SERIES II – AUXILIARY PCB...
  • Page 46 QL SERIES II – INTERFACE PCB – Sheet 1 of 2...
  • Page 47 QL SERIES II – INTERFACE PCB – Sheet 2 of 2...

This manual is also suitable for:

Ql355Ql564Ql355pQl355t output 1Ql355t output 2Ql355tp output 1 ... Show all

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