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Sofratec EXB500 User And Maintenance Manual

87.5 108 mhz fm 500w transmitter
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EXB500
87.5 ÷ 108 MHz FM 500W TRANSMITTER
USER AND MAINTENANCE MANUAL
SOFRATEC BROADCAST EQUIPMENT
WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71
Rev. 1.0 - 03/02

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  • Page 1 EXB500 87.5 ÷ 108 MHz FM 500W TRANSMITTER USER AND MAINTENANCE MANUAL SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 Rev. 1.0 - 03/02...

  • Page 2: Table Of Contents

    ASEXC25AM5, 25W FM RF driver amplifier (E0691) EXB500SM, 500W RF amplifier assembly (E0857) SRFB1K5ALM, 48V/70A SMPS regulator module SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 2...

  • Page 3: Introduction

    COVERS CLOSED TO PREVENT ELECTRICAL HAZARDS AND COMPLY WITH EMC STANDARDS. ——— MAINS VOLTAGE MAY KILL ——— SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 3...

  • Page 4: General Description

    The temperature alarm circuitry reduce the output power in case of high internal or ambient temperature, trying to continue to stay on the air in spite of the adverse conditions. SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 4...

  • Page 5: Technical Features

    Some leds signal at a glance proper functioning and warning states. SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 5...

  • Page 6: Rear Panel Connectors

    Please note that the transmitter is usually factory pre-set for 220-240 Vac nominal mains voltage. If requested, 110-120 Vac range must be internally set on the mains tranformer board. SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 6...

  • Page 7: Technical Specifications

    Reflected power Modulation limiter High internal or external temperature Real-time clock and date, with battery back-up SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 7...

  • Page 8: Installation And Use

    ARE PRESENT INSIDE AND BECOME ACCESSIBLE WHEN THE COVERS ARE RE- MOVED. ——— MAINS VOLTAGE MAY KILL ——— SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 8...

  • Page 9: Placing The Apparatus

    When both the the mains voltages are available, always prefer the higher one, to decrease the power loss on the mains line. SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 9...
  • Page 10 Do never switch the apparatus on without antenna connection, even when no RF drive is on. SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 10...

  • Page 11: System Connection

    The apparatus is factory pre-set with the first 2 levels disabled: this will permit to set most of SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 11...

  • Page 12: Lf Connection And Presets

    10k ohm. They can be connected to the balanced output of a professional mixer or to the unbalanced one of a cheaper unit without appreciable degradation. SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 12...
  • Page 13 Mpx or an externally processed signal, usually an unbalanced signal, can be supplied to the female LF, RF & control input / output connector ports SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 13...
  • Page 14 For this reason SOFRATEC recommend, whenever possible, to adopt +6 ÷ +11.5 dBm as nominal peak level for audio modulation purpose. SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 14...
  • Page 15 For this reason, the limiter’s cut-in threshold should never be too high. It SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 15...
  • Page 16 - Pin 7, Alarm: logic low signal means alarm. Correct functioning is signalled by +12V/10kΩ. Maximum current sinking capability <10mA. SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 16...

  • Page 17: Operation

    They will be internally 15-kHz SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 17...
  • Page 18 SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 18...
  • Page 19 CONNECTION MAY CAUSE DEGRADATION AND POSSIBLE DESTRUCTION OF THE FINAL STAGE. THIS FAILURE IS NOT COVERED BY THE GUARANTEE. SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 19...

  • Page 20: Commands And Programming

    SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 20...

  • Page 21: Factory Default Passwords

    SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 The "enter" key changes from scrolling to programming mode, if allowed in the field. Another push PAGE 21...
  • Page 22 EXB500 - USER AND MAINTENANCE MANUAL - rev.1.0 - 03/02 SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 22...
  • Page 23 01 JAN 01 17:22 23:00-06:00 P=50% ELAPSED TIME SET PASSWORD CONF. PASSWORD LEV.1 **** EXEC SW RESET? YES/NO SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 23...
  • Page 24 Anyway it is impossible to discover hidden functions without the proper password permission. Hierarchical menu tree SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 24...

  • Page 25: Enter Password

    20 characters long message e.g. the following organisation name: NORTH-WEST RADIO X25 SW rev. 1.0 SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 25...
  • Page 26 (aliasing). In this case the MPX level reading will anyway produce correct overall modulation measure. Menu #04: Left & Right Signal Level as analog moving bar SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 26...
  • Page 27 This field contemporary summarise the actual modulation in dB due auxiliary, left, right and multiplex signal as seen in their own menu fields. SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 27...
  • Page 28 In addition, the equipment may reliably work in an ambient which is even 10°C higher SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 28...
  • Page 29 If the code or the status is changed, it is always required to confirm the correct password for that level. SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 29...

  • Page 30: Software Reset

    Escaping will abort the change. A local time-out will automatically escape the input if not confirmed in 30s from the last change. SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 30...

  • Page 31: Confirm Password

    Allowed range is -12 ÷ +4 dBm to produce 10% modulation, i.e. 7.5kHz deviation or 0dB in the upper line of the display. SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 31...
  • Page 32 Auto Control on the lower line is not operative in some software releases. When it is, it will SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 32...
  • Page 33 The scaled power is approximate and must be tested and/ or adjusted before final setup, if critical. AUTO POWER-DOWN OFF 23:00--06:00 P=50% SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 33...

  • Page 34: Service And Maintenance

    The goods shall be delivered carriage prepaid to the laboratory and shall be returned freight forward. This guarantee does not cover any consequential damage due to non-operation or faulty operation. SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 34...

  • Page 35: Service Manual

    IN SMT ARE NOT INTENDED TO BE REPAIRED IN CASE OF FAILURE AND MUST BE REPLACED WITH NEW ONES. SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 35...
  • Page 36 CE compliance. Four unity-gain active buffers follow and than two balanced to unbalanced signal converters, which drive the electronic attenuator in the 2nd sheet. SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 36...
  • Page 37 SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 37...
  • Page 38 TR9 and TR10 and attains some 900 mW output level (+29 SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 38...
  • Page 39 The low-pass section and the directional coupler circuit shown in the electrical diagram and allowed in the board are not always present, because they are not needed for the driver. SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 39...
  • Page 40 The gate bias is separately adjusted through R15 and R16 on each section. Do not tamper the factory bias preset values! SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 40...
  • Page 41 It is suggested to substitute the module with a new one and send back the damaged unit to the factory for inspection and possible reparation. SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 41...
  • Page 42 SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 42...
  • Page 43 EXB500 - USER AND MAINTENANCE MANUAL - rev.1.0 - 03/02 EXB500 TRANSMITTER - FRONT & TOP ASSEMBLY VIEW SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 43...
  • Page 44 EXB500 - USER AND MAINTENANCE MANUAL - rev.1.0 - 03/02 EXB500 TRANSMITTER - REAR & BOTTOM INTERNAL VIEW SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 44...
  • Page 45 EXB500 - USER AND MAINTENANCE MANUAL - rev.1.0 - 03/02 EXB500 TRANSMITTER - GENERAL ELECTRICAL DIAGRAM SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 45...
  • Page 46 EXB500 - USER AND MAINTENANCE MANUAL - rev.1.0 - 03/02 EXB500 TRANSMITTER - EXCITER ASSEMBLY ELECTRICAL DIAGRAM SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 46...

  • Page 47: Electrical Diagram

    EXB500 - USER AND MAINTENANCE MANUAL - rev.1.0 - 03/02 SEXC25AL5 - AUXILIARY POWER REGULATOR BOARD ELECTRICAL DIAGRAM TIPOGRAFIA DI COMPONENTI SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 47...
  • Page 48 EXB500 - USER AND MAINTENANCE MANUAL - rev.1.0 - 03/02 SEXC25CON - CPU CONTROLLER & DISPLAY BOARD ELECTRICAL DIAGRAM SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 48...
  • Page 49 EXB500 - USER AND MAINTENANCE MANUAL - rev.1.0 - 03/02 SEXC25CON - CPU CONTROLLER & DISPLAY BOARD COMPONENTS LAYOUT SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 49...
  • Page 50 EXB500 - USER AND MAINTENANCE MANUAL - rev.1.0 - 03/02 SEXC1K05IN - INPUT & INTERFACE BOARD ELECTRICAL DIAGRAM TIPOGRAFIA DI COMPONENTI SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 50...
  • Page 51 EXB500 - USER AND MAINTENANCE MANUAL - rev.1.0 - 03/02 SEXC25MB - MAINBOARD / I/O & RF CONTROL SECTION ELECTRICAL DIAGRAM - 1 of 2 SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 51...
  • Page 52 EXB500 - USER AND MAINTENANCE MANUAL - rev.1.0 - 03/02 SEXC25MB - MAINBOARD / LF PROCESS SECTION ELECTRICAL DIAGRAM - 2 of 2 SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 52...
  • Page 53 EXB500 - USER AND MAINTENANCE MANUAL - rev.1.0 - 03/02 SEXC25MB - MAINBOARD COMPONENT LAYOUT SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 53...
  • Page 54 EXB500 - USER AND MAINTENANCE MANUAL - rev.1.0 - 03/02 SEXC23COD2 - STEREO ENCODER BOARD - ELECTRICAL DIAGRAM SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 54...
  • Page 55 EXB500 - USER AND MAINTENANCE MANUAL - rev.1.0 - 03/02 SEXC23COD2 - STEREO ENCODER BOARD COMPONENT LAYOUT SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 55...
  • Page 56 EXB500 - USER AND MAINTENANCE MANUAL - rev.1.0 - 03/02 SEXC25MOD - FM EXCITER BOARD - ELECTRICAL DIAGRAM SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 56...
  • Page 57 EXB500 - USER AND MAINTENANCE MANUAL - rev.1.0 - 03/02 SEXC25MOD - FM EXCITER BOARD - COMPONENT LAYOUT SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 57...
  • Page 58 EXB500 - USER AND MAINTENANCE MANUAL - rev.1.0 - 03/02 ASEXC25AMP - FM 25W POWER AMPLIFIER ELECTRICAL DIAGRAM SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 58...
  • Page 59 EXB500 - USER AND MAINTENANCE MANUAL - rev.1.0 - 03/02 ASEXC25AM5 - FM 25W POWER AMPLIFIER COMPONENT LAYOUT SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 59...
  • Page 60 EXB500 - USER AND MAINTENANCE MANUAL - rev.1.0 - 03/02 EXB500SM RF AMPLIFIER ASSEMBLY - ELECTRICAL DIAGRAM SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 60...
  • Page 61 EXB500 - USER AND MAINTENANCE MANUAL - rev.1.0 - 03/02 SRFB1K0IN - 2-PORT RF INPUT SPLITTER ELECTRICAL DIAGRAM SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 61...
  • Page 62 EXB500 - USER AND MAINTENANCE MANUAL - rev.1.0 - 03/02 SRFB1K0PB - 2-PORT RF OUTPUT COMBINER & LPF ELECTRICAL DIAGRAM SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 62...
  • Page 63 EXB500 - USER AND MAINTENANCE MANUAL - rev.1.0 - 03/02 SRFB500W - 500W AMPLIFIER MODULE ELECTRICAL DIAGRAM SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 63...
  • Page 64 EXB500 - USER AND MAINTENANCE MANUAL - rev.1.0 - 03/02 SRFB500W - 500W AMPLIFIER MODULE COMPONENT LAYOUT SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 64...
  • Page 65 EXB500 - USER AND MAINTENANCE MANUAL - rev.1.0 - 03/02 SRFB1K5ALM - 48V/70A SMPS REGULATOR ELECTRICAL DIAGRAM - POWER SECTION SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 65...
  • Page 66 EXB500 - USER AND MAINTENANCE MANUAL - rev.1.0 - 03/02 SRFB1K5ALM - 48V/70A SMPS REGULATOR ELECTRICAL DIAGRAM - CONTROL SECTION SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 66...
  • Page 67 EXB500 - USER AND MAINTENANCE MANUAL - rev.1.0 - 03/02 SRFB1K5ALM - 48V/70A SMPS REGULATOR COMPONENT LAYOUT - POWER SECTION SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 67...
  • Page 68 EXB500 - USER AND MAINTENANCE MANUAL - rev.1.0 - 03/02 SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 68...
  • Page 69 EXB500 - USER AND MAINTENANCE MANUAL - rev.1.0 - 03/02 SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 69...
  • Page 70 EXB500 - USER AND MAINTENANCE MANUAL - rev.1.0 - 03/02 SOFRATEC BROADCAST EQUIPMENT WWW.sofratec.com - e-mail : info@sofratec.com Tel: +33 4 93 01 99 99 Fax: +33 4 93 01 99 71 PAGE 70...

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