SLX2 WIRELESS HANDHELD TRANSMITTER
Contents
1. 6 2 10 13 9 7 9 Group 9 Group 10 Group 11 Group 12 Group 13 Group 14 Group 15 1 854 425 863 200 838 200 838 900 838 100 838 700 838 400 2 855 525 864 500 839 900 842 600 841 100 842 800 840 600 3 857 400 841 000 845 900 842 700 844 800 842 100 4 858 500 842 375 847 500 847 000 846 300 844 700 5 859 900 844 400 848 600 849 200 847 400 846 600 6 861 000 846 100 850 100 850 400 849 200 848 100 7 847 350 852 100 852 500 851 300 850 700 8 849 400 853 300 854 100 851 850 9 851 800 855 100 855 300 853 700 10 853 200 857 210 11 858 650 12 859 800 13 861 900 Explanation of U K preferred European Compatible setup Compatible setup Compatible setup Compatible setup Compatible setup Co ordinated harmonized band for use with for use with for use with for use with for use with group content frequencies optimized for 863 EUT TW TZ S6 EUT VR VT S6 PSM400 KE S6 gt PSM400 KE S6 PSM200 S5 S6 gt reia 865 MHz gt TW TZ gt VR VT KE KE S5 25A1090 Rev 3 23 25A1090 Rev 3 AGENCY APPROVALS Note Consult Global Compliance for latest applicable standards FCC H5 J3 L4 Part 74 IC H5 J3 L4 RSS 123 ETS H5 J3 L4 P4 Q4 R5 S6 EN 300 422 and EN 301 489 TELEC JB RCR STD 22 PRODUCT PERFORMANCE CHARACTERISTICS SPECIFICATION Value Operating Frequency H5 518 102. Frequency TP_PAO TP_PA1 Low 0 0 Center 0 1 High 1 1 Test Frequencies MHz H5 J3 JB L4 P4 Q4 R5 S6 SLX2 Low 518 400 572 400 806 125 638 400 702 100 740 125 800 525 838 100 Center 529 500 583 500 807 500 649 500 714 000 746 325 810 275 851 300 High 541 800 595 800 809 750 661 800 725 900 751 875 819 800 864 800 RF BAND RESISTORS Two resistors R and R are responsible to start the microcontroller in a RF band They de termine the voltage at test point TP_RFBAND This table shows R s and R s reference designators and how the voltages at the test points reflect the operating RF band SLX Reference Designators SLX2 Ra Rs R319 R320 This figure depicts the voltage divider feeding the microprocessor analog to digital converter 25A1090 Rev 3 Ra 2 1Ck TP_RFBAND Ra 2 25A1090 Rev 3 This table shows the variant resistor values and resulting voltages at TP_RFBAND for each band RF BAND Rb TP_RFBAND 0 10V H5 1 00k 0 30V J3 2 99k 0 76V L4 4 99k 1 10V R5 7 50k 1 41V S6 12 10k 1 81V P4 18 2k 2 13V Q4 30 1k 2 48V JB 49 9k 2 75V Note Voltages are calculated with a 3 30V 0 10V reference from the power HC DECISIONS BASED ON ANALOG VOLTAGES supplies If power section supports less than 3 30V thresholds need to be adjusted Continuous Operation Battery Thresholds
3. BATTERY_A2D RF Level Display Logic Voltage V Te N TT G dBC lt 2 25 nn gt dBC lt 2 14 gt 8 dBC lt 2 05 gt Note There is a dead battery lock voltage set at 2 30 Volts Ifthe transmitter is powered on with a voltage of less than 2 30 Volts the system will lock forcing the user to either recharge or replace the batteries During the dead battery lock out the battery gauge is empty and the red led flashes NOTES 25A1090 Rev 3 FUNCTIONAL TEST REQUIRED TEST EQUIPMENT OR APPROVED EQUIVALENT OR SUPERIOR MODELS Spectrum analyzer or power meter HP8590L Agilent E4403B Agilent E4407B Digital multimeter Fluke 87 Audio Analyzer HP 8903B Frequency Counter HP 53181 HP 5385A Power Supply Power Supply must be able to supply 3Vdc with an internal ammeter Shielded test lead Shure PT1838F BNC Male to BNC Male cable 1 Shure PT1838A UA820 Antenna Frequency Dependent Audio Test Head PT1840 Brass Ring PT1838Y LISTENING TEST Before completely disassembling the transmitter operate it to determine wether it is functioning normal ly and try to duplicate the reported malfunction Refer to pages 2 and 3 for operating instructions trouble shooting and specifications Review any customer complaint or request and focus the listening test on any reported problem The following more extensive functional t
4. channels TVch for use with for use with for use with for use with 50 702 710 MHz 51 710 718 MHz 52 718 724 MHz on P4 gt un P4 aa P4 gt ld P4 25A1090 Rev 3 20 Q4 740 000 752 000 MHZ 25A1090 Rev 3 Preprogrammed frequencies in total 36 Group 1 Group 2 Group 3 Group 4 1 740 125 740 125 740 125 740 125 2 741 500 741 950 741 225 740 800 3 743 375 743 500 742 925 741 825 4 744 600 745 675 744 325 743 075 5 746 325 747 400 745 425 745 125 6 748 500 748 625 746 875 746 575 7 750 050 750 500 748 925 747 675 8 751 875 751 875 750 175 749 075 9 751 200 750 775 10 751 875 751 875 Explanation Full Range Full Range Full Range Full Range of group max of max of max of max of content compatible compatible compatible compatible frequencies freque cies frequencies frequencies option 1 option 2 option 3 option 4 21 R5 R5 800 000 820 000 MHZ Preprogrammed frequencies in total 113 11 11 11 9 8 9 9 Group 1 Group 2 Group 3 Group 4 Group 5 Group 6 Group 7 1 801 250 801 225 800 950 800 525 801 475 800 600 800 650 2 804 825 804 800 802 950 801 925 803 025 802 050 803 125 3 806 975 806 950 804 325 803 650 805 800 804 275 804 450 4 808 800 808 775 806 425 804 850 806 950 805 750 806 150 5 810 325 810
5. R320 1K 3 01K 4 99K 18 2K 30 1K 7 5K 12 1K 7 5K R4 DNP DNP DNP 1K DNP DNP DNP DNP R5 DNP DNP DNP DNP 1K DNP DNP DNP R6 DNP DNP DNP DNP DNP 1K DNP DNP R606 22 10 22 10 22 10 22 10 22 10 22 10 22 10 49 90 R607 DNP DNP DNP 0Q DNP DNP DNP DNP R612 4990 4990 4990 4990 2210 DNP DNP 2210 R613 1090 1090 1090 1090 22 10 0Q 10Q 22 10 R614 4990 4990 4990 4990 2210 DNP DNP 2210 R640 DNP DNP DNP DNP DNP DNP DNP 33 20 R650 4990 4990 4990 4990 2210 4990 2210 2210 R651 100 1090 1090 1090 22 10 18 20 22 10 22 10 R652 4990 4990 4990 4990 2210 4990 2210 2210 R653 22 10 22 10 22 10 22 10 22 10 1090 1090 22 10 R7 DNP DNP DNP DNP DNP DNP 1K DNP R8 DNP DNP DNP DNP DNP DNP DNP 1K 34 25A1090 Rev 3 SLX2 PRINTED CIRCUIT BOARD ASSEMBLY SLX2 4 gt A c98 O e546 2 ls om ai BEI eso ai 3 gt en E af a ai a amp a Q iaka 4 BE 3 JE 3 23 00 a us El SL T Te an O ES S F a 10 g Siae Y S T E E Uns E 20
6. 0 75 in Weight 73 grams 2 6 oz without batteries Housing Molded ABS case and battery cover Frequency Range and Transmitter Output Level Band Range Transmitter output H5 518 542 MHz 30 mW 15 dBm J3 572 596 MHz 30 mW 15 dBm L4 638 662 MHz 30 mW 15 dBm P4 702 726 MHz 30 mW 15 dBm R5 800 820 MHz 20 mW 13 dBm S6 838 865 MHz 10 mW 10dBm JB 806 810 MHz 10 mW 10dBm Q4 740 752 MHz 10 mW 10 dBm NOTE This Radio apparatus may be capable of operating on some frequencies not autho rized in your region Please contact your national authority to obtain information on authorized frequencies for wireless microphone products in your region Operating Range Under Typical Conditions 100m 300 ft Note actual range depends on RF signal absorption reflection and interference Audio Frequency Response 2 dB Minimum 45 Hz Maximum 15 kHz Total Harmonic Distortion ref 38 kHz deviation 1 kHz tone 0 5 typical Signal to Noise Ratio gt 100 dB A weighted Operating Temperature Range 18 C 0 F to 50 C 122 F Note battery characteristics may limit this range Transmitter Audio Polarity Positive pressure on microphone diaphragm or positive voltage applied to tip of WA302 phone plug produces positive voltage on pin 2 with respect to pin 3 of low impedance output and the tip of the high impedance 1 4 inch output Gain Adjustment Range 25 dB Audio
7. 300 808 050 807 400 809 125 806 850 807 250 6 811 550 811 525 809 275 808 525 810 575 808 550 808 725 7 813 175 813 150 810 800 810 275 811 725 809 875 810 950 8 815 275 815 250 812 625 811 550 813 800 812 350 812 400 9 816 650 816 625 814 775 813 775 813 450 813 500 10 818 650 818 625 818 350 11 819 750 819 800 819 775 Explanation of Full Range max Full Range max f Full Range max f Germany Germany Sweden Sweden group content of comp Fre of comp of comp preferred User preferred User preferred 800 preferred 800 quencies amp FIN Frequencies amp Frequencies amp Group 4 800 814 Group 4 800 814 814MHz option 814 MHz option NOR DEN FIN NOR DEN FIN NOR DEN MHz option 1 MHz option 2 1 2 option 1 option 2 option 3 800 000 820 000 MHZ CONTINUED 7 7 3 8 6 8 6 Group 8 Group 9 Group 10 Group 11 Group 12 Group 13 Group 14 1 806 000 806 025 801 400 800 900 801 200 803 850 806 150 2 807 100 807 425 808 300 802 100 803 800 807 000 811 650 3 808 500 808 525 816 400 806 200 805 900 809 700 814 400 4 809 600 810 400 809 300 807 000 811 050 816 500 5 811 475 811 500 814 100 809 200 813 900 817 450 6 812 575 812 900 816 100 811 700 816 500 819 300 7 813 975 814 000 817 200 817 600 8 819 600 819 500 Explanation of Compatible setup Compatible setup Compatible setup Compatible setup Compatible setup Compatible setup Compatible setup for use with for use with for use with for use with
8. APPROVED EQUIVALENT OR SUPERIOR MODELS Spectrum analyzer or power meter HP8591E Agilent E4403B Agilent E4407B Digital multimeter Fluke 87 Audio Analyzer HP 8903B RF Signal Generator HP 8656B or HP E4400B Frequency Counter HP 53181 HP 5385A Receiver Matching SLX4 Receiver 50 ohm RG 174 BNC to open stripped Shure PT 1824 coaxial cable or rocket launcher tip P N 95A8278 For JB Murata cable MXGS83RK3000 may be used Audio Test Head Shure PT1840 Brass Ring Shure PT1838Y BNC Male to BNC Male Cable 2 Shure PT1838A DC Blocker Shure PT1838W XLR Female to Banana Plug Adapter Shure PT1841 20 dB Attenuator Shure PT1838T Toray non inductive tuning tool BLUE Shure PT1838K Toray non inductive tuning tool PINK Shure PT1838L 2541090 Rev 3 ALIGNMENT PROCEDURE Alignment and Measurement Procedure The alignment procedure is sequential and does not change unless specified Use RG58 or other low loss 50 ohm cables for all RF connections Type RG174 thin 50 ohm cables can be used for short e g 6 inch runs Keep RF test cables as short as possible Include the insertion loss of the cables and the connectors for all RF measurements DC voltages are present at most RF test points Use DC blocks to protect the test equipment if necessary All audio analyzer fil ters should be OFF unless otherwise specified VOLTAGE REGULATION CHECK With power applied properly an
9. Install two fresh AA batteries and turn the unit on Verify normal display operation Set the unit to the lowest frequency in the group 2 Observe the radiated output on a spectrum analyzer by holding it near the analyzer s antenna Measure the frequency and RF power output level and verify that they are within expected limits 3 Speak into the microphone Observe the modulation on the spectrum analyzer display and listen to the audio output on a matching SLX4 receiver tuned to the same channel prefer ably the customer s unit if this is a field return Check for normal audio level Listen for dis tortion noise or any unusual sounds 4 Change the frequency to the highest frequency in the group Repeat steps 2 and 3 above and verify that operation is normal RF FREQUENCY OR SIGNAL PRESENCE PROBLEMS Ifthere is no carrier present atthe transmitter antenna port or measured RF power is unusually low check the earlier stages to verify decent continuity of the signal path An amplifier stage or filter may have a part placement error or other defect Usually the first step is to visually examine the board for skewed missing parts before going in with a probe If there is no signal out of the VCO output then check the control voltage at TP_PLL_TV when the transmitter is set at the low est channel in the group If the voltage is not tunable into the 1 1 1 4 V window but can be tuned to a lower or higher voltage this means the VCO might be built
10. for use with for use with for use with group content EUT TL TV R5 PSM400 MN R5 gt PSM400 MN R5 PSM200 R8 R5 gt PSM200 R8 R5 EUT TL TV R5 PSM400 MN R5 gt gt TL TV MN MN R8 R8 gt TL TV MN 25A1090 Rev 3 22 S6 838 000 865 000 MHZ Preprogrammed frequencies in total 119 13 13 13 6 3 3 6 6 Group 1 Group 2 Group 3 Group 4 Group 5 Group 6 Group 7 Group 8 1 838 200 838 150 838 550 854 200 855 475 855 075 854 750 854 750 2 841 450 839 375 839 775 855 300 857 425 857 775 855 850 855 850 3 843 275 841 300 841 700 856 700 860 600 860 725 857 250 857 250 4 846 225 842 475 842 875 857 800 858 350 858 350 5 847 350 846 400 846 800 859 675 860 225 860 225 6 850 125 848 025 848 425 860 775 861 325 861 325 7 852 575 850 025 850 425 8 854 575 852 475 852 875 9 856 200 855 250 855 650 10 860 125 856 375 856 775 11 861 300 859 325 859 725 12 863 225 861 150 861 550 13 864 450 864 400 864 800 Explanation Full Range max Full Range max Full Range max BEL TUR U K preferred U K preferred U K preferred U K preferred of group ie compatible 4 of compatible 4 of compatible nn ES a ser ae SET anore natan ae quencies requencies requencies opt TV ch ordinate ordinate requencies requencies content option 1 option 2 option 3 854 862 MHz 1 2 or SET 3 INDOORS de S6 838 000 865 000 MHZ CONTINUED
11. see a square wave Vpp 5V f0 32768Hz at microcontroller pin 18 TONEKEY_SQUARE Ifthese stages can be captured with the scope the microcontroller did its part to let audio go through the system If audio is still not being transmitted please involve RF spectrum analyzer and oscilloscope to debug the RF and audio stage of the transmitter 25A1090 Rev 3 30 REPLACEMENT PARTS PRODUCT CHANGES PARTS DESIGNATIONS 2541090 Rev 3 The following comments apply to the parts list and the schematics SLX2 MODEL VARIATION Resistors Unless otherwise noted all resistors are surface mount with 1 10 W rating and 1 toler Capacitors Unless otherwise noted non polarized capacitors are surface mount NPO dielectric types with a 100 V capacity and a 5 tolerance and polarized capacitors are tantalum types COUNTRY FREQUENCY COUNTRY SLX2 CODE RANGE DESIGNATION RF AUDIO PC BOARD NUMBER H5 554 590 MHz U S A and CANADA 200H510304 J3 572 596 MHz U S A and CANADA 200310304 L4 638 662 MHz U S A and CANADA 2001410304 P4 702 726 MHz EUROPE CHINA 200P410304 Q4 740 752 MHz KOREA 2000410304 R5 800 820 MHz EUROPE 200R510304 S6 838 865 MHz GREAT BRITAIN 2008610304 JB 806 810 MHz JAPAN 200JB10304 SLX2 HARDWARE REPLACEMENT PARTS Reference Description Shure Designation Part Number Al IR Assembly 190A10302 IR Detector 40kHz 188A617 3 Pin Male Connector Strip 170A76 A2 Hand
12. 0 648 325 649 500 651 750 653 800 8 653 650 652 575 652 225 653 100 653 300 656 250 9 655 275 654 950 654 525 655 425 654 400 657 550 10 657 775 656 425 656 575 657 450 655 800 659 200 11 659 500 658 500 659 600 658 775 657 500 660 325 12 660 750 661 600 661 575 660 900 660 225 661 800 Explanation of group content Full Range even distribution for each TV CH option 1 Full Range even distribution for each TV CH option 2 Full Range max of frequencies for CH 42 option 1 Full Range max of frequencies for CH 43 option 1 Full Range max of frequencies for CH 44 option 1 Full Range max of frequencies for CH 45 option 1 2541090 Rev 3 P4 702 000 726 000 MHZ Preprogrammed frequencies in total 148 12 12 12 10 10 9 9 10 11 Group 1 Group 2 Group 3 Group 4 Group 5 Group 6 Group 7 Group 8 Group 9 1 702 200 703 750 703 650 702 750 703 750 702 100 704 775 702 300 703 000 2 704 200 705 975 705 650 704 500 705 750 704 025 706 225 704 975 706 025 3 707 200 707 200 708 650 705 750 708 250 705 500 710 500 706 775 708 000 4 709 425 708 850 710 875 708 250 711 750 708 500 712 025 709 100 710 300 5 711 000 710 950 712 450 711 250 714 500 710 100 714 225 710 300 712 225 6 713 675 712 425 715 125 712 500 715 750 712 025 716 900 712 225 716 000 7 715 575 714 325 717 025 715 250 718 750 713 500 718 50
13. 0 714 775 717 100 8 717 050 717 000 718 500 718 750 721 250 717 300 720 775 716 700 719 000 9 719 150 718 575 720 600 721 250 722 500 725 300 725 300 724 000 720 225 10 720 800 720 800 722 250 723 250 724 250 725 900 722 775 11 722 025 723 800 723 475 724 700 12 724 250 725 800 725 700 Explanation Full Range Full Range Full Range France France France France France France of group max of max of max of preferred preferred preferred preferred preferred preferred content compatible compatible compatible UserGroupA UserGroupA UserGroupB UserGroupB UserGroupC User Group C frequencies freque cies frequencies option 1 option 2 option 1 option 2 option 1 option 2 option 1 option 2 option 3 P4 702 000 726 000 MHZ CONTINUED 6 6 5 10 8 10 8 Group 10 Group 11 Group 12 Group 13 Group 14 Group 15 Group 16 1 702 200 710 200 718 200 702 550 702 100 702 700 702 500 2 703 300 711 300 719 300 705 600 704 700 704 700 705 500 3 704 700 712 700 720 700 707 500 710 300 709 450 707 000 4 705 800 713 800 721 800 709 000 712 400 711 500 712 200 5 707 675 715 675 723 675 711 500 714 000 714 500 714 100 6 708 775 716 775 715 100 716 500 716 550 716 400 7 717 000 719 400 719 900 719 500 8 720 000 721 300 722 000 722 200 9 723 500 724 700 10 725 900 725 900 11 12 Explanation of Optimized TV Optimized TV Optimized TV Compatible setup Compatible setup Compatible setup Compatible setup group content channels TVch channels TVch
14. 0 to 541 900 MHz 572 100 to 595 900 MHz Operating Frequency J3 Operating Frequency L4 638 100 to 661 900 MHz Operating Frequency P4 702 100 to 725 900 MHz 740 100 to 751 900 MHz Operating Frequency R5 800 100 to 819 900 MHz P4 Operating Frequency Q4 R5 Operating Frequency S6 838 100 to 864 900 MHz Operating Frequency JB 806 125 to 809 750 MHz Number of User Selectable Channels See frequency table Type of Emission 120KF3E Oscillator PLL controlled synthesizer RF Conducted Power Output Band Dependent See Table 1 Tonekey Signal 32 768kHz Maximum FM Deviation 38 kHz Dynamic Range gt 100 dB Total Harmonic Distortion lt 0 7 38 kHz deviation 1 kHz Audio Adjustment Range 10 0 or 15 dB user selectable Operating Voltage 3V 2 x AA alkaline or rechargeable Power Consumption 130mA 15mA O 3V Battery Life gt 8 hrs alkaline batteries JB MODEL CHANGES FROM R5 MODEL Operating Frequency 806 to 810 MHz Number of User Selectable Channels 16 125 kHz Spacing Frequency Stability 10 ppm Reference FM Deviation1 kHz audio level 5 kHz 23 47 dBu 52 mV at TPAO Output Power See Table 1 24 NOTES 25A1090 Rev 3 25 PRODUCT SPECIFICATIONS MECHANICAL GENERAL 25A1090 Rev 3 Overall Dimensions 64 mm x 109 mm x 19 mm 2 50 x 4 30 x
15. 2AE56 L611 Inductor SMD 603 10nH 162N25 Q205 Transistor TMOS SOT 23 2N7002L 183A30 Q475 Transistor Power Mosfet NSD355AN 183A74 Q501 502 Transistor High Frequency 25C5006 183A66 Q600 Transistor SOT 23 AT 41533 183A49 Q601 Transistor Bipolar Silicon AT 41486 183A44 Q630 Transistor PNP SOT 23 MMBT2907L 183A27 Q375 480 631 Transistor Low Noise SOT 23 MMBT5089L 183A38 SW324 325 Switch Pushbutton Momentary SPST 155421 SW100 Switch Slide 2 Position 155A32 TR160 200 Trim pot Line 100KQ 146E10 TR640 Trim pot Line 4700 146A10 Y500 Crystal Quartz SMD 16MHz 140A26 MICROCONTROLLER IC300 SELECTION Country Shure Part Number Code H5 188A585A J3 188B585A L4 188C585A P4 188D598A Q4 188E585B R5 188F585A S6 188G585A JB 188H585B FREQUENCY DEPENDENT PARTS Frequency H5 J3 L4 P4 Q4 R5 S6 JB Code C506 150pF 68pF 68pF 68pF 68pF 68pF 68pF 68pF C522 6 8pF 5 6pF 4 7pF 3 9pF 3 9pF 3 3pF 3 3pF 3 3pF C523 3 3pF 3 9pF 2 7pF 2 2pF 3 9pF 2 2pF 2 2pF 2 2pF C525 3 9pF 3 9pF 2 2pF 2 2pF 1 8pF 1 8pF 1 8pF 1 8pF C528 3 3pF 1 5pF 2 2pF 1 0pF 2 7pF 1 5pF 1 0pF 1 5pF C534 3 9pF 3 9pF 2 7pF 2 7pF 2 2pF 2 2pF 2 2pF 2 2pF C543 12pF 10pF 4 7pF 4 7pF 6 8pF 6 8pF 6 8pF 6 8pF C551 8 2pF 5 6pF 4 7pF 4 7pF 5 6pF 5 6pF 5 6pF 5 6pF C603 120pF 68pF 68pF 68pF 68pF 68pF 68pF 68pF C611 3 9pF 2 7pF 2 7pF 2 2pF 3 9pF 3 9pF 3 3pF 3 9pF C612 10pF 6 8pF 6 8pF 6 8pF 10pF 10pF 5 6pF 10pF C615 2 7pF 2 2pF 2 2pF 2 2pF 2 2pF 2 2pF 3 3pF 2 2pF C616 10
16. 532 575 532 225 533 100 533 300 536 250 9 535 275 534 950 534 525 535 425 534 400 537 550 10 537 775 536 425 536 575 537 450 535 800 539 200 11 539 500 538 500 539 600 538 775 537 500 540 325 12 540 750 541 600 541 575 540 900 540 225 541 800 Explanation of group Full Range even Full Range even Full Range max of Full Range max of Full Range max of Full Range max of content distribution foreach distribution for each frequencies for CH frequencies for CH frequencies for CH frequencies for CH TV CH option 1 TV CH option 2 22 option 1 23 option 1 24 option 1 25 option 1 J3 572 000 596 000 MHZ Preprogrammed frequencies in total gt 120 Group 1 Group 2 Group 3 Group 4 Group 5 Group 6 1 572 400 573 250 572 200 573 775 573 100 572 425 2 575 500 574 500 573 675 576 500 575 225 574 400 3 577 575 576 225 574 800 578 200 576 550 577 425 4 579 050 578 725 576 450 579 600 578 575 579 475 5 581 425 580 350 577 750 580 700 580 900 581 775 6 583 200 581 550 580 200 582 250 584 500 585 675 7 586 450 584 800 582 325 583 500 585 750 587 800 8 587 650 586 575 586 225 587 100 587 300 590 250 9 589 275 588 950 588 525 589 425 588 400 591 550 10 591 775 590 425 590 575 591 450 589 800 593 200 11 593 500 592 500 593 600 592 775 591 500 594 325 12 594 750 595 600 595 575 594 900 594 225 595 800 Explanation of group Full Range even Full Range even Full Range max of Full Range max of Full Range max of Full Range max of
17. 8 i 7 oae oo y E 3 y 5 2 3 cs de is O gl oe e Rss 2 o l 3 2 Ea Ig en 22001 4 10 10 Ir E 20 2 E 5 3 all EI aso 2 S 2 2500 E er E 5 C30 2305 E S 3 683 i ag Lal d O fja m E a S Eje Z 0408 R189 C188 n C1 EN OKT a Sa we name El 3 3333333 au gt Lo E u a lo Lo g S82 G 8 288 D Da m 3 z gt it F 3 z S id oo F p3 g J FR o y j z El FE E a z N L t 199 TE AE 25A1090 Rev 3 BOTTOM VIEW 35 SHURE
18. H 11 CH 13 RF TUNING The removal of L641 prevents antenna loading of output VCO Tuning 1 Set transmitter to its LOW frequency as indicated in the table above 2 With a DC meter probe TP_PLL_TV top 3 Tune CV500 to obtain 1 10 1 40 Vdc at TP_PLL_TV For Q4 units this voltage should read between 1 45 2 25 Vdc For JB units this voltage should read between 1 75 2 05 Vac 4 Set the transmitter to HIGH frequency 5 Verify voltage at TP_PLL_TV is less than or equal to 4 3 V DC 25A1090 Rev 3 FREQUENCY ALIGNMENT 1 Set the transmitter to MID frequency see table on page 14 2 Connect the 50 cable to a frequency counter 3 Adjust variable capacitor CV501 until the frequency counter measurement matches the appropriate frequency on the table below 1 kHz GROUP CODE FREQUENCY RANGE H5 529 500 Mhz 1 kHz J3 583 500 Mhz 1 kHz JB 807 500 Mhz 1 kHz L4 649 500 Mhz 1 kHz P4 714 000 Mhz 1 kHz Q4 746 325 Mhz 1 khz R5 810 275 Mhz 1 kHz S6 851 300 Mhz 1 kHz RF OUTPUT POWER The output power measurement ensures that the output signal is strong enough for sufficient range when the system is in use The output power measurement also verifies tha the output power is not above the specified maximum level to ensure compliance with regulatory angencies standards 1 RF output power is only adjustable on and JB units Use RG58 PT 1824 or any other low loss 50 cables for
19. Input Level 5 dBV maximum at mic gain position 10 dBV maximum at 0 dB gain position 20 dBV maximum at 10 dB gain position Input Impedence 1MQ 26 ENVIRONMENTAL 2541090 Rev 3 RF Transmitter Output 30 mW maximum dependent on applicable country regulations Dimensions 254 mm H x 51 mm dia 10x2 in including SM58 cartridge Weight 375 6 grams 13 25 oz without batteries Housing Molded ABS handle and battery cup Power Requirements 2 AA size alkaline or rechargeable batteries Battery Life gt 8 hours alkaline Temperature Storage 7 days at 165 F 74 F degrees unpackaged 7 days at 20 F 29 C degrees packaged After each 7 day storage period units must be allowed to stabilize for 24 hours before testing Units must operate per Section V Temperature Cycling 5 cycles from 20 F 29 C degrees to 165 F 74 C degrees Allow 24 hours for stabilization before testing Units must operate per Section V specifications mechanically and electrically Operational Temperature Operate units as described in Section V at 0 F 18 C and 135 F 57 9 C degrees Allow three hours for stabilization of each temperature before testing Units must operate per Sec tion V specifications Steady State Humidity Perform a 10 day test at 90 RH at room temperature Evaluate units for visual and mechan ical defects after 1 3 5 7 and 10 days At the end of the 10 day period allow the units to recover for 24 hour
20. SHun SLX2 Wireless Transmitter Service Manual 25A1090 SLX2 WIRELESS HANDHELD TRANSMITTER PRODUCT DESCRIPTION FEATURES 2006 Shure Incorporated 25A1090 Rev 3 10 11 The Shure Model SLX2 is a uP microprocessor controlled frequency agile UHF handheld transmitter operating over the frequency range of 518 to 865 MHz in eight different 24 MHz wide frequency bands The transmitter will operate for a minimum of 8 hours using two AA alkaline batteries The User Interface includes mode and set buttons and an LCD that displays battery status group channel and transmitter receiver frequency synchronization The SLX2 has a plastic enclosure and utilizes an internal antenna for optimum range and reliability This product is intended for use in entry level presentation installed and performance markets Frequency agile microprocessor controlled Model number extension determines frequency band of operation Minimum of 12 compatible systems per SKU in the U S Additionally a minimum of 12 compatible systems in the top 50 U S markets across all three domestic SKU s H5 J3 and L4 Operating frequency programmable locally or from the receiver using a built in IR link Designed for use with AA alkaline batteries 2 required May also be used with rechargeable AA batteries Note battery condition indicator is calibrated for alkaline batteries and may not be accu rate with rechargeable types Electr
21. V before shutdown and will not turn the system back on until a voltage greater than 2 25 V is present The hysteresis keeps the system in a controlled state when the batteries are low and also helps pre vent weak batteries from being used from the start RF CIRCUIT DESCRIPTION 2541090 Rev 3 RF SECTION The system block diagram is shown above The SLX2 uses a PLL system with direct carrier frequency modulation Processed audio enters the VCO through a passive reflection network before being applied to the varactor diode D500 through choke L503 The VCO is shielded to prevent external RF fields from affecting its operation and to help control radiated emissions of its harmonics Power for the VCO and PLL circuitry is supplied by the main 5 V regulator Power and signal lines in the VCO area are heavily decoupled and bypassed to remove noise The VCO has a tuning bandwidth of more than 30 MHz on all bands with a tuning voltage range of approximately 1 to 4 volts The VCO employs separate stages for the oscillator Q502 and buffer Q501 to minimize phase noise and load pulling The VCO output is isolated by ca pacitive and resistive dividers before being applied to the frequency control pin of the PLL syn thesizer IC501 through C538 The synthesizer s internal circuitry divides the RF signal down as necessary to achieve a tuning precision of 25 kHz The synthesizer circuit contains a quartz con trolled reference oscillator operating f
22. all RF connections 2 Include the insertion loss of the cables and connectors in rf conductive power measure ments Connect the RF output of the transmitter to a spectrum analyzer Set the spectrum analyzer center frequency to match the transmitter frequency 5 Using a power meter or spectrum analyzer verify the output power matches the range indicated in the table below JB models can be adjusted at TR640 gt o GROUP Pout RANGE H5 14 dBm 2dB J3 14 dBm 2 dB JB 7 0 10 8 dBm L4 14 dBm 2 dB P4 14 dBm 2 dB Q4 10 dBm 2 dB R5 13 dBm 2 dB S6 10 dBm 2 dB 6 Remove the BNC to unterminated test cable PT1824 and replace L641 to reconnect the antenna DEVIATION ADJUSTMENT Deviation must be set to make sure the companding systems between the transmitter and re ceiver correctly track each other The level coming out of the transmitter s audio compressor must match the level going into the receiver s audio expander A fixed gain structure does not ensure exact match primarily because of variations in voltage controlled oscillators VCO s USING A SLX4 RECEIVER The following procedure requires a SLX4 receiver Itis recommended that a properly tuned receiver be used to perform the transmitter deviation adjustment 25A1090 Rev 3 N DAPR OP mn oP NA RECEIVER SETUP SLX4 RECEIVER AUDIO ANALYZER RF SIGNAL GENERATOR Output Unbalanced Measureme
23. content distrobution foreach distrobution foreach frequencies for CH frequencies for CH frequencies for CH frequencies for CH TV CH option 1 TV CH option 2 31 option 1 32 option 1 33 option 1 34 option 1 18 25A1090 Rev 3 JB L4 806 000 810 000 MHZ Preprogrammed frequencies in total 21 Group 1 Group 2 Group 3 Group 4 Group 5 Group 6 1 806 250 806 375 806 125 806 500 806 125 806 250 2 807 500 808 625 807 375 807 375 807 375 807 250 3 809 625 809 750 809 500 808 625 808 375 808 500 4 809 625 809 750 809 375 Explanation of group Full Range max of Full Range max of Full Range max of Full Range max of Full Range max of Full Range max of content compatible compatible compatible compatible compatible compatible frequencies option 1 frequencies option 2 frequencies option 3 frequencies option 4 frequencies option 5 frequencies option 6 638 000 662 000 MHZ Preprogrammed frequencies in total gt 120 Group 1 Group 2 Group 3 Group 4 Group 5 Group 6 1 638 400 639 250 638 200 639 775 639 100 638 425 2 641 500 640 500 639 675 642 500 641 225 640 400 3 643 575 642 225 640 800 644 200 642 550 643 425 4 645 050 644 725 642 450 645 600 644 575 645 475 5 647 425 646 350 643 750 646 700 646 900 647 775 6 649 200 647 550 646 200 648 250 650 500 651 675 7 652 450 650 80
24. d the unit switched on measure the DC voltages at the fol lowing test points All test points are located on the top side of the PCB Refere to the component diagram Test Points Voltages TPBATT Battery input 3 0 2 Volts TP5V Power Converter 5 0 2 Volts TP3 3V Power Converter 3 3 0 2 Volts TPA1 Audio Preamp 2 5 0 2 Volts TPA3 Tone Key Summing Amp 2 5 0 2 Volts IC150 Pin 14 TPVREF IC100 Pin 5 2 5 0 1 Volts INITIAL SETUP Proper adapters should be used to connect the test equipment Apply 3 V to the battery terminals with the proper polarity Set audio gain switch SW100 to 10 dB Remove L641 to disengage the antenna ALL EXCEPT JB Solder the center of a 509 unshielded test cable PT1824 to the node between L606 and L641 and the shield to ground 6 Connect the audio generator output to the Mic Test Head input of the transmitter as required 7 Turn on the SLX2 by pressing and holding the POWER button SW325 OVP Oo O 25A1090 Rev 3 Frequency H5 J3 JB L4 P4 Q4 R5 S6 Level LOW GRP 1 GRP 1 GRP 1 GRP 1 GRP 14 GRP 1 GRP 4 GRP 13 CH 1 CH 1 CH 5 CH 1 CH 1 CH 1 CH 1 CH 1 MID GRP 4 GRP 4 GRP 1 GRP 4 GRP 14 GRP 1 GRP 4 GRP 14 CH 7 CH 7 CH 2 CH 7 CH 5 CH 5 CH 7 CH 7 HIGH GRP 6 GRP 6 GRP 5 GRP 6 GRP 15 GRP 1 GRP 2 GRP 3 CH 12 CH 12 CH 4 CH 12 CH 10 CH 8 C
25. ests require partial disassembly FUNCTIONAL TEST Refer to the Disassembly section to partially disassemble the transmitter for the following functional tests TEST SETUP 1 Remove the PCB from the handle 2 Set gain switch to 0 dB 3 Connect the terminal of the power supply through a milliammeter to the battery terminal and the power supply terminal to the battery terminal 4 Connect a DC Voltmeter across the power supply and set the power supply for 3Vdc 5 Connect the audio analyzer to the microphone via the microphone test head PT1840 as needed DISPLAY TEST Power unit ON Verify that all display segments are displayed for approximately 2 seconds This includes a full bat tery indication and 1818 displayed for group and channel DW REVERSE BATTERY PROTECTION TEST Adjust power supply to 3 0 0 1 V dc 2 The current should be less than 0 5 mA _ VOLTAGE REGULATION TEST With power applied properly and the unit switched on measure the DC voltages at the following test points All test points are located on the top side of the PCB Refere to the component diagram TPBATT Battery input 3 0 2 Volts TP5V Power Converter 5 0 2 Volts TP3 3V Power Converter 3 3 0 2 Volts TPA1 Audio Preamp 2 5 0 2 Volts TPA3 Tone Key Summing Amp IC150 Pin 14 2 5 0 2 Volts TPVREF IC100 Pin 5 2 5 0 1 Volts CURRENT CONSUMPTION TEST 1 With 3V applied
26. et the audio analyzer frequency to 1kHz Adjust the audio analyzer amplitude level typically 6 5 dBu to obtain 13 dBu 0 1dB at TPA1 This corresponds to 9 dBu 2dB at the audio input TPAO Adjust TR160 to obtain 3 dBu 0 15dB at TPA2 Place the transmitter closer than 12 inches 36 cm to the receiver Connect both antennas on the receiver Connect the unbalanced output of the receiver to the audio analyzer Adjust TR200 until the ac voltmeter connected to the receiver unbalanced output reads the same deviation reference voltage 0 1dB as measured above TR200 adjusts the deviation for 33 kHz 100 modulation If successful in the alignment of the unit assemble it back together as indicated on page 12 If not successful refere to our Bench Checks section on page28 NOTES 25A1090 Rev 3 FREQUENCY TABLES H5 518 000 542 000 MHz Preprogrammed frequencies in total gt 120 Group 1 Group 2 Group 3 Group 4 Group 5 Group 6 1 518 400 519 250 518 200 519 775 519 100 518 425 2 521 500 520 500 519 675 522 500 521 225 520 400 3 523 575 522 225 520 800 524 200 522 550 523 425 4 525 050 524 725 522 450 525 600 524 575 525 475 5 527 425 526 350 523 750 526 700 526 900 527 775 6 529 200 527 550 526 200 528 250 530 500 531 675 7 532 450 530 800 528 325 529 500 531 750 533 800 8 533 650
27. f numbers on the display after the unit has powered up the microcontroller is running fine Fragments of numbers in the display point to an open LCD driver pin or an intermittent LCD panel connection To test the microcontroller for normal operation please test the following pins and conditions Microcontroller Pin Number Net Name Condition 1 to gnd RST 3 3V 4 to gnd IRQ 3 3V Across 10 and 9 VDD and VSS 3 3V Across 20 and 21 VDDAD and 3 1V VSSAD Across 28 and 29 VDDA and 3 3V VSSA 31 to gnd OSC2 Square Wave f0 32768Hz The turn on procedure of the SLX transmitters includes several stages T 0 000s The power is turned on soft switch 5V and 3 3V are established approximately atthe same time T 0 480s 32 768KHz crystal oscillates in a stable manner 300ms and internal reset cycle 180ms is over From now software gets executed T 0 s Microcontroller pin 5 RF_VCC_OFF goes from 5V to OV Synthesizer is powered on T 0 s PLL data gets sent You should see a signal similar to the graphic on an oscilloscope Tek GH Single seq goon Edge Source ch1 NL more 2 00ms Ch3 1of2 Dit Coupling y E ch3 DC lt Edae gt Holdoff 29 1 PLL_LE E pin 34 2 PLL_DATA pin 35 3 PLL_CLOCK pin 36 T 1 800s Microcontroller pin 6 RF_GND_ON goes from OV to 5V RF carrier gets unmuted T 2 000s Tone key is turned on You will
28. f the tone key or the transmitter is turned off the receiver will be muted The tone key squelch will eliminate receiver noise associated with loss of the carrier which usually sounds like a pop The tone key signal is generated by a square wave from the mP IC300 It is then filtered by active filter stage Q185 and attenuated by R188 R189 under uP control before being fed to the summing amplifier The combined audio tone key signal is then sent to the VCO through R504 POWER SECTION Two AA batteries supply power to the transmitter through FET Q410 which provides electri cal reverse battery protection Next power enters switching boost converter IC400 which sup plies regulated 5V power To turn on the transmitter SW325 shorts the base of Q480 to ground enabling the converter and powering up the unit The microprocessor keeps Q480 disabled until shutdown Power is turned off by a shutdown signal from the microprocessor which can be initiated manually by the user by holding down SW325 for 2 2 seconds or automatically by the system e g when the battery is too weak for proper operation At this time the microprocessor enables Q480 and shuts down the converter When the unit is off Q480 and its bias circuitry draw less than 30 pA so the effect on battery life is negligible The converter and microprocessor are dis abled LOW BATTERY SHUT DOWN A software battery shutdown routine allows the battery supply to run down to 2 05
29. for the wrong band or has a wrong part Check the values of the caps C522 C523 C528 C525 C534 and inductor L505 one by one and try to tune into the window Note that these caps are Low ESR series If the voltage at TP_PLL_TV is O V and does not respond to tuning CV500 the loop is unlocked Check Y500 for a 16 MHz oscillation by setting the analyzer to CENTER FREQ 16 MHz REF LEVEL 40 dBm SPAN 1 MHz Hold the probe right above the crystal and look for a spike like signal If one is present check the parts in the VCO including parts other than the capacitors mentioned above to see if anything is not soldered correctly Check bias voltages on the transistors to verify that they are powered and biased correctly If an oscillation exists at the output and is close to the nominal center frequency within 100 kHz but cannot be tuned to the 3 KHz window via CV501 check the value of the caps C536 and C537 Check that the trimmer CV501 is soldered correctly LOW RF OUTPUT POWER If RF signal is present at the right frequency with low power compare the RF power measure ments with a known good board at various points moving from the antenna backwards towards the VCO Look for signal discontinuities in the path sudden large drop in measured power by more than a few dB Check the board visually for missing skewed parts Try to confine the problem to a specific cir cuit segment and then check solder connections and part values or DC volta
30. ges for error If the power out of the VCO is very low check the bias voltages on the transistors and the values of L502 C551 C543 C530 EXCESSIVE CURRENT DRAIN Try isolating different sections of the transmitter such as the RF Audio and Digital circuits Look for reversed polarity capacitors wrong resistor values poorly soldered components and shorted traces 28 DEVIATION PROBLEMS If TR200 can t be adjusted to obtain proper deviation try to isolate the problem to the Audio or RF section To check the RF section set the transmitter frequency to the frequency listed in Table 1 2 in Section IV and verify that the tuning voltage of the VCO is correct To check the audio section apply 10dBu at 1kHz to TPAO Set the gain to 0 dB Check for audio with a scope at TPA1 The level should be approximately OdBu Next check the audio level at TPA2 for 0 8dBu Finally check the level at pin 14 of IC150 4 If the level is correct check the values of R504 R510 R511 and C513 C5126 in the VCO area lf there is no audio or the level is wrong the problem is in the audio section Trace backwards through the audio stages until you find the prob lem MICROCONTROLLER TROUBLESHOOTING 2541090 Rev 3 This paragraph describes what digital signals need to be seen to have audio running through a SLX system The first thing that needs to be checked is if the microcontroller is running its soft ware If you see numbers or only fragments o
31. he SLX2 Choose a setting appropriate for vocal volume and for the performing environment Use the tip of a pen or a small screwdriver to move the switch OdB For quiet to normal vocal performance e 10dB For loud vocal performance GROUP 2541090 Rev 3 O it CHANNEL u a iu select MASTER LIST Incompatible SLX2 Transmitter Programming Manually Select a Group and or Channel ES 1 Press and hold the select button until the GROUP and CHANNEL displays begin to alternate 2 To change the group setting release the select button while GROUP is displayed a While GROUP is flashing pressing select increases the group setting by one 3 To change the channel setting release the select button while CHANNEL is displayed b While CHANNEL is flashing pressing select increases the channel setting by one Lock or Unlock Transmitter Settings Press the mute o and select buttons simultaneously to lock or unlock the transmitter settings When locked the current settings cannot be changed manually Locking the transmitter does not disable in frared synchronization Battery Status Indicates charge remaining in transmitter batteries Master List Indicator Indicates that a master list frequency is currently in use No group or channel information is displayed Note the transmitter cannot be used to change master list settings INCOMPATIBLE Frequency Warning The INCOMPATIBLE warning ind
32. ical reverse battery protection is included Minimum battery life of 8 hours with new AA alkaline batteries Designed for use with SM58 BETA 58 SM86 and BETA 87A amp C microphone heads Compatible with active load or standard heads active load circuitry to be incorporated in heads Tone key squelch Power Mute and Select buttons with LCD display for frequency group channel selection and con trol LED backlight for easy reading of LCD display Bicolor green red LED for power on and low battery mute and infrared link indications Rugged plastic construction Utilizes Shure Patented ARC Audio Reference Companding audio processing DETAILED DESCRIPTION 25A1090 Rev 3 Features 1 Interchangeable microphone head SM58 pictured 2 Power Infrared IR Mute indicator Green ready Amber mute on Flashing red IR transmission in process Glowing red battery power low Pulsing red battery dead transmitter cannot be turned off until batteries are changed 3 LCD screen 4 On off mute switch Press and hold to turn on or off Press and release to mute or unmute 5 Select switch 6 IR port Receives infrared beam to synchronize frequencies When using multiple systems only one transmitter IR port should be exposed at a time o 90 Adjusting Gain Access the gain adjustment switch a by unscrewing the head of the microphone Two gain settings are available on t
33. icates that the receiver and transmitter are transmitting on different frequency bands Contact your Shure retailer for assistance AUDIO RF BLOCK DIAGRAM Deviation Trim and Tone Key i 2 pole Sum Am co aitih P 17KHz emphasis VCA LPF Audio Input y mic head n O 5 Photodetector Limiter RMS Detector Compressor Tone Key Frequency Synthesizer control Audio Muting EPROM Channel Select RF Muting Pawar Mute VCO Carrier Range er RF Pad RF Pad Loop Amp 0 4 dB Band Amp 0 4 dB Band Filter dependent dependent gt gt 5V DC Source Frequency DC DC Synthesizer AA Battery Converter Supply O 16 MHz CIRCUIT DESCRIPTION AUDIO CIRCUIT DESCRIPTION AUDIO SECTION Audio enters the transmitter board through pin 4 of the mic jack board connector CON100 Pin 2 of the connector provides 5 Vdc bias for the mic head Pin 6 supplies the ground connec tion The audio preamp 1C150 2 provides either O or 10 dB of gain user switchable via SW100 Capacitor C140 couples the signal into a pre emphasis network formed by R140 R141 and C141 Next the audio signal enters the patented Shure ARC processor The main elements in this section are the VCA IC100 5 and the RMS Detector IC100 4 The VCA or Voltage Controlled Amplifier is a DC controlled amplifier Following the VCA the signal enters a 3 pole 17kHz low pass filter stage IC 100 2 that protects the RMS detector fr
34. le Assembly 95A9047B Aluminum ID Ring 53A8594 IR Bezel 65A8474 A3 Battery Cover Assembly 95A9068 Foam Pad 36A814 A4 Battery Holder Assembly 95B9048 MP1 Headboard PCB 190 057 03 34 MP2 Copper Contacts 53F2039A MP3 3 Pin Interconnect Strip 56E8074 MP4 Retaining Ring 30A1314 MP5 Internal Frame 65B8467 31 2541090 Rev 3 MP6 Bezel 65A8475B MP7 Pushbutton Switch Actuator Power Mute Select 66A8070 MP8 Battery Cup 65BA8451 MP9 Frequency Nameplate 39 8466 Provide Frequency Code In The Space MP10 PCB Screw 30J1245B MP11 Battery Nest Screws 30D443E MP12 RF Shield Cover 53A8590A MP13 LCD Holder Backlight 6548452 MP14 LCD Bezel 53A8573B MP15 LCD 95A8991 MP16 LCD Zebra Connector 80A8257 MP17 Compression Pad For Positive Battery Contact 38D189 SLX2 REPLACEMENT PARTS TOP Reference Description Shure Designation Part Number C100 Capacitor Tantalum SMD1206 15uF 10V 10 151AC156KA C162 Capacitor Tantalum SMD1411 10uF 16V 10 151AD106KB C531 Capacitor Tantalum SMD1206 0 1uF 35V 10 151AG104KA C432 548 549 Capacitor Tantalum SMD1411 100uF 6V 10 151AB107KB DS375 Chippled Green LED 184A77 DS420 Bicolor Red Green LED 184A39 E408 500 Bead Ferrite SMD 805 600 OHM 162412 IC1 L C D Backlight Holder 65A8452 IC100 28 Pin QSOP Compander THAT4320 188A568 IC370 1K Mic
35. nt AC level INT FM Gain Maximum Filters FM RATE 1kHz Toke Key Disabled R280 Low Pass 30 kHz ON Amplitude 50 dBm High Pass 400 Hz ON Deviation 33 kHz ON The SLX2 transmitter should be powered OFF for this procedure Connect the rf signal generator to any of the antenna inputs on the receiver Make sure the dc block is on the rf signal generator Set rf signal generator to the same frequency as the SLX2 transmitter Set rf signal generator modulation to 1 kHz and deviation to 33 kHz Set the amplitude of the rf signal generator to 50 dBm Disable tonekey by shorting the pads of R280 on the receiver DEVIATION REFERENCE LEVEL Power ON the receiver Connect the unbalanced output of the SLX4 receiver to the audio analyzer input Note the voltage obtained This is the deviation reference voltage Disconnect the rf signal generator from the SLX4 Power OFF the receiver and remove the short on the R280 pads to enable tonekey RADIATED DEVIATION REFERENCE VOLTAGE SLX2 TRANSMITTER AUDIO ANALYZER Power 3 Vdc Measurement AC level Atennuation 10 dB Output 1 kHz Channel See Table Filters Group See Table Low Pass 30 kHz ON High Pass 400 Hz ON Connect the audio analyzer output to the Mic Test Head input of the transmitter Power ON the receiver Apply 3V to the battery terminals on the SLX2 and power up the unit S
36. om energy above the audio band Next the signal is coupled to the RMS detector IC100 1 which converts itto a DC voltage A 1 dB increase at the input to the detector produces a 6 mV increase at its output The detector output is fed to the compression threshold stage IC150 2 This stage provides the transition from uncompressed to compressed signal At low levels the audio is uncompressed because diode D169 is turned off As the AC level increases the output of IC150 2 decreases enough to turn the diode on As D190 conducts the compression ratio changes from 1 1 to 5 1 Once D190 is turned fully on the audio compression ratio remains fixed at 5 1 An additional diode in the bias 25A1090 Rev 3 network D162 provides temperature compensation for changes in the Vy or cut in voltage of D190 After the compression threshold stage the DC control signal is amplified by a 40 dB fixed gain stage IC 100 5 It is then sent to the VCA control voltage input EC Following the ARCTM processor section the audio signal must pass through a muting network consisting of R199 R200 C205 and Q205 A trim pot TR200 allows the audio deviation level to be set Next audio enters the tone key summing amp 1C150 4 Here tone key is added to the audio before passing to the RF section for transmission The tone key signal is used in the receiver to provide audio output only when the tonekey signal is present with the transmitted sig nal therefore i
37. pF 12pF 12pF 12pF 12pF 12pF 10pF 12pF C617 6 8pF 8 2pF 8 2pF 8 2pF 8 2pF 8 2pF 8 2pF 8 2pF C618 12pF 10pF 5 6pF 3 9pF 6 8pF 6 8pF 4 7pF 6 8pF C619 120pF 68pF 68pF 68pF 68pF 68pF 68pF 68pF C651 8 2pF 6 8pF 4 7pF 2 2pF 5 6pF 5 6pF 5 6pF 5 6pF C97 DNP DNP DNP DNP DNP DNP DNP DNP E301 6000 DNP DNP DNP DNP DNP DNP DNP E302 6000 DNP DNP DNP DNP DNP DNP DNP E303 6000 DNP DNP DNP DNP DNP DNP DNP 33 E603 6002 6002 6002 6002 DNP DNP DNP DNP L301 DNP 220nH 220nH 220nH 180nH 180nH 180nH 180nH L302 DNP 220nH 220nH 220nH 180nH 180nH 180nH 180nH L303 DNP 220nH 220nH 220nH 180nH 180nH 180nH 180nH L400 470nH 470nH 470nH 470nH 220nH 220nH 220nH 220nH L401 470nH 470nH 470nH 470nH 220nH 220nH 220nH 220nH L502 15nH 15nH 15nH 12nH 6 8nH 6 8nH 6 8nH 6 8nH L505 5 4nH 5 4nH 3 85nH 3 85nH 2 55nH 2 55nH 2 55nH 2 55nH L602 22nH 22nH 18nH 15nH 8 2nH 8 2nH 8 2nH 8 2nH L603 DNP DNP DNP DNP 180nH 180nH 180nH 180nH L604 18nH 18nH 12nH 12nH 8 2nH 8 2nH 10nH 8 2nH L605 15nH 12nH 8 2nH 8 2nH 6 8nH 6 8nH 6 8nH 6 8nH L606 15nH 12nH 8 2nH 8 2nH 6 8nH 6 8nH 6 8nH 6 8nH L607 15nH 8 2nH 12nH DNP 8 2nH 8 2nH 12nH 8 2nH L640 DNP DNP DNP DNP DNP DNP DNP 12nH L641 6 8nH 8 2nH 10nH 1 2nH 12nH 12nH 12nH DNP R1 1K DNP DNP DNP DNP DNP DNP DNP R2 DNP 1K DNP DNP DNP DNP DNP DNP R201 121K 150K 121K 121K 121K 121K 150K 150K R3 DNP DNP 1K DNP DNP DNP DNP DNP
38. rom a 16 MHZ reference crystal Y801 that is adjusted by means of trimmer CV501 The transmitter output frequency is user selectable in groups of com patible channels within each of the eight available bands Frequency selection is made via mi croprocessor controller IC300 which interfaces with the user by means of the Group and Channel switches SW324 and SW325 The output of the synthesizer is a series of pulses that are integrated by a passive loop filter consisting of C532 R514 C533 R513 and C531 to pro duce the control voltage signal The VCO output is coupled to the RF buffer stage Q600 by a matching network consisting of R602 C614 and L610 R600 and R603 provide base bias for the transistor while R605 sets its operating current RF choke L600 provides power and decoupling for the stage in conjunction with C600 C604 The collector of Q600 feeds the power amplifier stage via an impedance matching network consisting of L602 C611 and C618 The bias voltage for the RF power amplifier Q601 is supplied by R601 and R604 Its operat ing current is controlled via emitter resistor R606 RF choke L601 provides power and decoupling for the stage in conjunction with C605 C609 For Japanese systems only the output power is trimmed via TR640 L603 C612 and L604 provide the output impedance matching into the low pass filter which consists of L604 L605 L606 C615 C616 and C617 The low pass filter output couples to the battery antenna
39. rowire EEPROM 93AA46AT V OT 188A577 IC350 Segment Type LED Driver 188A506 1C430 3 3V CMOS LDO Regulator SP6213EC5 188A590 Q185 Low Noise Transistor MMBT5089L 183A38 Q410 Transistor Power Mosfet NSD355AN 183A74 SW324 325 Switch Pushbutton Momentary SPST 155421 Y331 Crystal Quartz SMD 32 768 kHz 40A8010 SLX2 REPLACEMENT PARTS BOTTOM Reference Description Shure Designation Part Number CON100 3 Pin Socket Strip Female For headboard 170C15 CON301 3 Pin Socket Strip Female For IF cable 95A9054 CON600 Positive Battery Contact 53A8591 CON601 Negative Battery Contact 95A9064 CON640 Connector COAX w Switch ONLY JB models 170A36 CV500 Trim Cap SMD 0 65 2 5pF 152A04 CV501 Trim Cap SMD 3 0 15pF 152E05 D162 190 Switching Dual Diode SMD MMBD2836L 184A07 D400 480 Common Anode Schottky Diode BAT 54A 184B69 D500 Variable Capacitance Diode 184A72 D600 Dual Schottky Diode BAT 54S 184A69 E100 Bead Ferrite SMD 805 600 OHM 162A12 IC150 Quad Op Amp SO 14 MC33179 188A49 10400 Sync Boost Converter LTC3400ES6 188A479 IC501 Low Power Dual Synthesizer LMX2335LTM 188B388 32 25A1090 Rev 3 L404 Inductor SMD 2518 4 7nH 162A64 L501 503 Inductor SMD 603 100nH 162A25 L600 601 Inductor SMD 603 150nH 16
40. s Units must pass Section V specifications Operational Humidity Operate units as described in Section V at 90 RH at room temperature Allow two days for stabilization Moisture Resistance Perform a 10 day test at 90 to 98 RH with temperature cycled between 14 F 10 C and 150 F 65 C degrees Allow the units to recover for 24 hours Product must meet Section V specifications Mechanical Shock Handheld Drop Test Drop product from a height of 6 onto a hardwood floor for a total of 10 drops The unit must pass Section V specifications Stand Drop Test Place product on a stand with the appropriate size swivel adapter Drop unit from a height of 5 onto a hardwood floor for total of 10 drops The product must meet Section V specifications Electrostatic Discharge Product will be subjected up to a 15 kV air discharge and 4 kV contact discharge Units must operate per Section V specifications 27 TROUBLESHOOTING 2541090 Rev 3 Servicing will be more efficient when the history of the unit is known and can be taken into ac count The service strategy should be different when a unit fails on the production line than when it fails in the field because if it fails on the line there is a possibility of incorrect or missing parts If the unit has failed in the field check for signs of tampering or hand soldering that could indicate that the customer has modified the unit or has attempted to repair it PRELIMINARY TESTS 1
41. s than 60 dB IF ALL TEST PASSED THIS MEANS THE UNIT IS PROPERLY FUNCTIONING AND NO ALIGNMENT IS REQUIRED ASSEMBLY AND DISASSEMBLY Observe precautions when handling this static sensitive device ICAUTION EXPLODED VIEW An C 25A1090 Rev 3 1 D Description Part Number 0001 Cartridge 0002 Tuned PCB assembly 200 082 0003 PCB assembly IR 190A098 01 0004 PCB head board 190 057 03 34 0005 Contact 53F2039A 0006 Frame internal 65B8467 0007 Retaining ring 30A1314 0008 bezel painted printed 65A8475B 0009 Pushbutton actuator silicone 66A8070 0010 Battery cup painted 65BA8451 0012 Shield cover steel plated 53A8590A 0014 3 pin interconnect 170A74 0015 PCB Screw hi lo 4 30J1245 0016 Handle assembly 95A9047B 0017 Battery holder assembly 95B9048 0018 Battery holder Machine screw 2 56 30D443E 0019 Nameplate frequency 39 8466 0022 Battery cover assembly 95A9068 SERVICE PROCEDURES MEASUREMENT REFERENCE NOTE Audio levels in dBu are marked as dBm on the HP8903 dB Conversion Chart OdBV 2 2 dBu OdBu OdBm assuming the load 600 ohms Be aware that dBu is a measure of voltage and dBm is a measure of power The HP8903 for example should be labeled dBu instead of dBm since it is a voltage measurement These two terms are often used interchangeably even though they have different meanings REQUIRED TEST EQUIPMENT OR
42. sible Move the unit along the UA820 antenna until you find a maximum peak Do a peak search and measure the power to be at least 2 dBm for H5 J3 L4 and P4 bands and at least O dBm for Q4 R5 JB and S6 bands Set SPAN to 200 KHz Measure the frequency to be within 3 kHz of the nominal frequency you are testing See frequency tables on pages 19 to 24 TONE KEY LEVEL TEST Set Power Supply to 3 0VDC Find transmitting carrier on the spectrum analyzer with a span of 200 kHz Use the Peak Search Marker Delta Next Peak soft keys on the analyzer Measure the 32 768 kHz tone key level to be 21 dBc 1 5 dB Set Power Supply to 2 1 V 1 segment on LCD battery icon Measure the 32 768 kHz tone key level to be 14 dBc 1 5 dB OCCUPIED BANDWIDTH TEST JB model only Set transmitter gain to maximum Set up the HP 8591E spectrum analyzer to measure Occupied Bandwidth with the following set tings e Percentage Power 99 5 e Channel Spacing 250 kHz Bandwidth 110 kHz Connect the audio generator to TAG connector CON90 Use a 1 kHz tone with a level that gives 23 47 dBu 52mV at TPAS Increase the audio level by 36dB Measure Occupied Bandwidth to be less than 110 kHz ADJACENT CHANNEL POWER TEST JB model only Set the spectrum analyzer and audio input level to the same settings as stated in Radiated RF Output Power and Frequency Stability and Distortion Test Measure Extended Adjacent Channel Power to be les
43. to the battery terminals and the unit powered on 2 Verify the current drain is 130 15mA 25A1090 Rev 3 10 1 oO Ni gt DB 25A1090 Rev 3 FREQUENCY RESPONSE TEST Set the audio generator as follows e Frequency 1 kHz Amplitude 20 dBu e Filters 30 kHz LPF With the audio analyzer probe TPA2 top side it should read 3 4dBu 0 5dB Record this level using the Ratio button This level will be used as your reference level for the following test Change the generator s frequency to 100Hz and measure the level at TPA2 to be 2 2dB 0 2dB relative to the 1kHz reference level Change the generator s frequency to 10kHz and measure the level at TPA2 to be 2 3dB 0 2dB relative to the 1kHz reference level Disengage the Ratio button DISTORTION TEST Set the audio generator frequency to 1kHz with an amplitude of 20 0dBu Activate the 30kHz LPF on the audio generator Measure the total harmonic distortion and noise THD N at TPA2 to be less than 0 7 RADIATED RF OUTPUT POWER AND FREQUENCY STABILITY TEST Choose any group and channel free of interference Using a spectrum analyzer with the appropri ate band UA820 antenna measure the approximate near field radiated power as follows SPAN 100 MHz e REF LVL 10dBm FREQUENCY Look at tables on pages 18 thru 23 Extend the UA820 away from the analyzer into the horizontal plane straight out Align the SLX2 antenna parallel to the UA820 as close as pos
44. via C641 and L607 Connector CON640 and C613 are only used for Japanese JB units Coupling capacitor C610 is used to ensure that both batteries are driven equally The transmitter is capable of delivering up to 15 0 dBm to the antenna depending on band and country During transmitter power up and frequency selection the RF output is muted by bringing the base of Q631 low which removes bias from Q630 and shuts down power to the RF stages The RF output is also muted during the transmitter power down sequence This is done so that the carrier signal will not interfere with other transmissions when the loop becomes unlocked DIGITAL CIRCUIT DIAGRAM Backlight LED RF Band DC Level Power LED LCD Driver an Ronm Lc BU9729k Sythesizer Power Mute National vco Semiconducter Button LMX2335 Microprocessor Motorola MC68HC908GR16 Select RF Power Button Softstart Tonekey Shutdown Squarewave Infrared EEPROM 3 Tonekey Photodetector MicroChip Rugio Muta Level Sharp GP1U10X 93AA46 25A1090 Rev 3 DIGITAL SECTION ACCESSING DIFFERENT MODES ATE MODE If TP_PBO is held to TP_EGND or logic level 0 at startup the microcontroller will enter ATE Mode To ensure proper operation TP_PAO and TP_PA1 should be held to TP_EGND at startup In ATE Mode each band has a three test frequencies that are controlled by the logic levels at test points TP_PAO and TP_PA1
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