sennheiser_sk100g2_sk300g2_sk500g2_sa280205 电路图.pdf

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1、SA 280205 Subject to alterations Sennheiser electronic GmbH 1.5V or battery pack BA 2015; 2.4V Nominal voltage _ +2.4VDC Operating voltage _ +1.8VDC to +3.1VDC Switch-off threshold when powered by batteries _ +1.8VDC when powered by BA 2015 accupack_ +2.0VDC Switch-on threshold _ +2.2VDC Current con

2、sumption at nominal voltage_ 170mA with transmitter switched off _ 250A Operating time when powered by batteries or accupack _ 8 hours Battery status indication_ 100%, 70%, 30%, low battery Programming interface _ integrated infrared interface Temperature range _ -10C to +55C Dimensions in mm_ 82 x

3、63 x 23 Weight incl. batteries _ approx. 200g Compliant with Europe_CE 0682 USA _FCC ID: DMOB2EUVL Canada _IC: 2099A-G2SK Japan _R202Y2378511; R202Y2378512; R202B2378531; R202B2378532 SK 100 G2, SK 300 G2, SK 500 G2 6/2702/2005 2.2AF characteristics Audio input LINE / MIC _ jack socket; 3.5mm AF tra

4、nsmission range Microphone_ 40Hz to 18kHz (3dB) Japan: 40Hz to 15kHz (3dB) Line _ 80Hz to 18kHz (3dB) Japan: 80Hz to 15kHz (3dB) AF sensitivity levels _ 0 to -30dB (also refer to input level on page 11) Compander system _ Sennheiser HDX Preemphasis _ HDX-dependent Input impedance Microphone_ 10kW Li

5、ne _ 1MW; parallel 470pF, guitar-optimised Total harmonic distortion (at nominal deviation, 1kHz) _ 0.9% Signal-to-noise ratio (referring to peak deviation) _ 110dB(A) via HDX system Max. input voltage (peak deviation) Microphone_ 1.8Veff (unw) Line _ 2.4Veff SK 100 G2, SK 300 G2, SK 500 G2 02/20057

6、/27 2.3RF characteristics Modulation _ Wideband FM, F8W Number of transmission frequencies (tunable in steps of 25kHz)_ 1440 Frequency ranges in MHz _ 518-554 626-662 740-776 774-810 (Japan) 786-822 834-870 Number of frequency banks with preset channels (presets) SK 100 G2 _ 8 banks with 4 channels

7、each SK 300 G2 _ 8 banks with 8 channels each SK 500 G2 _ 8 banks with max. 20 channels Freely adjustable frequency bank (tunable in steps of 25kHz) SK 100 G2 _ 1 bank, 4 tunable channels SK 300 G2 _ 1 bank, 8 tunable channels SK 500 G2 _ 1 bank, 20 tunable channels Switching bandwidth _ 36MHz Harmo

8、nic emissions _ 1W Spurious wave emissions in the range from 47MHz to 862MHz_ 4nW all other frequencies 1GHz _ 250nW Channel grid _ n x 25kHz Frequency stability within temperature range 10kHz Intermodulation distance (400 kHz) at antenna distance 10cm _ 36dB Nominal deviation_ 24kHz Peak deviation

9、(at 1kHz) 48kHz / Japan: 40kHz RF transmitting power max. at 50W _ 30mW, +0.8dB/-3dB Japan: 10mW, +0.8dB/-3dB Covered bandwidth according to ETSI at -20dBc_ 140kHz at -60dBc_ 200kHz Pilot tone Frequency _ 32.766kHz 7.6Hz Deviation_ 2kHz 0.5kHz Carrier signal-to-noise ratio referring to peak deviatio

10、n within switching bandwidth_ 75dB(A)eff SK 100 G2, SK 300 G2, SK 500 G2 8/2702/2005 3Exploded view 022 004 005 009 013 012 006 011 023 014 008 SK 500 G2) (SK 300 G2, (SK 100 G2) (SK 100 G2) 016 010 007 007 015 017 008 022 002 002 002 002 003 002 001 018 020 019 019 SK 500 G2) (SK 300 G2, SK 100 G2,

11、 SK 300 G2, SK 500 G2 02/20059/27 PosDescription 001Housing complete 002Lens screw 003Clamp 004Cover, LCD 005Cover, LOW BAT 006Cover, infrared 007SK 100 G2: plug right SK 300 G2 / SK 500 G2: double charging contact 008SK 100 G2: plug left SK 300 G2 / SK 500 G2: single charging contact 009Battery cov

12、er 010Axle 011Antenna 012PCB RF 013Battery case 014PCB mainboard 015LC display complet 016Flat cable, 20 pin 017Slide button, black 018Rocker switch, black 019Knob 020Shielding cup 021Label 022Lens screw 023Slottet nut SK 100 G2, SK 300 G2, SK 500 G2 10/2702/2005 4Test and alignment instructions 4.1

13、Measuring and test equipment 1 Spectrum analyzer (up to at least 3GHz) 1 AF signal generator 1 Multimeter 1 Laboratory power supply 1 AF level meter 1 RF power meter 1 RF measuring demodulator 1 Frequency counter 1 PC with service software ew G2) Reference Read out / modified the unit data via infra

14、red adaptor. See also chapter “Reading out / Changing of device data via infrared adaptor” on page 15. 4.2Measuring set-up + Laboratory DC IN AF IN 230.00 MHz AF generator RF OUT Spectrum analyzer AF level meter 230.00 MHz IR MIC LINE GND PC with service software ew G2 1) + Frequency counter Multime

15、ter RF power meter SK x00 G2SK x00 G2 NTC pin Pins of the battery case See“Mainboard, printed circuit board, component side” page 26. Measuring demodulator power supply 1) Note: AF IN: Ground modification of the phone jack: - If you feed in the MIC signal you have to ground the LINE connector of the

16、 phone jack - If you feed in the LINE signal you have to ground the MIC connector of the phone jack. SK 100 G2, SK 300 G2, SK 500 G2 02/200511/27 4.3Special service tools Service set for service software ew G2 (Part-No. 094739) Verwendung im Kapitel: “Reading out / Changing of device data via infrar

17、ed adaptor” on page 15 Infrared adaptor SK 100 G2, SK 300 G2, SK 500 G2 12/2702/2005 4.4Test table Se- quence Type of measure- ment/adjustment Signal inputDevice settingsMesuring point/ test point Required value Remarks 1Visual inspectionVisual inspection 1.1MIC/LINE jack socket Contacts are not twi

18、sted, no hairline cracks at the solder points, no mechanical damage 1.2MUTE slide controlSee 1.1 1.3? / ? button (S204 /S206), SET button (S202), ON/OFF (S208) button Buttons on motherboard spring back See 1.1 1.4Battery compartments See 1.1 1.5Charging contacts (not SK 100 G2) See 1.1 1.6Antenna co

19、ntacts to RF PCB See 1.1 1.7Flat ribbon cables and terminal strips No mechanical damage, locked 2Motherboard: current and voltage measurement Attention The buttons S204, S206, S202, and S208 on the motherboard may be damaged, if you press them using sharp-edged flat or pointed objects (e.g. the tip

20、of a ballpoint pen). Only use objects with end-rounded tips that will not damage the buttons. 2.1Current consumption when transmitter is switched off POWER“ = OFFConnected in series to BK+ battery contact See page 26 220A; typ. 180A Current limita- tion of labora- tory power supply unit: ION = 300mA

21、 2.2Current consumption when in operation Supply +2.4VDC via battery contacts POWER“ = ON; (press button for approx 3 seconds) See 2.1170mALC display is switched off. Test points see page 26 2.3Rated voltageSee 2.2See 2.2BK+ / BK-+2.4VDC 2.4Operating voltageSee 2.2See 2.2 See page 26 BK+ / BK-+1.8VD

22、C to +3.1VDC 2.5DC to DC converter voltage See 2.2See 2.2TP224/ GND+5,3VDC to +5,7VDC 2.6Switch-on/switch-off thresholds 2.6.1Switch-on threshold when powered by battery See 2.2See 2.2See 2.5+1.8VDC 2.6.2Switch-on threshold when powered by accupack See 2.2; SK OFF: Connect the NTC contact to ground

23、via isolated wire, then switch on SK again: See page 26 See 2.2See 2.5+2.2VDC 2.6.3Switch-off threshold when powered by battery See 2.2See 2.2See 2.5+1.8VDCLED LOW BAT has to flash 2.6.4Switch-off threshold when powered by accupack See 2.6.2See 2.2See 2.5+2.0VDCLED LOW BAT has to flash SK 100 G2, SK

24、 300 G2, SK 500 G2 02/200513/27 3RF module See “Measuring set-up” page 10. Removing the RF module: 1. Loosen the lens-head screw on the RF PCB (see exploded view, pos. 22). 2. Remove the RF module (maintain the motherboard connection via flat ribbon cable). Re-establishing the ground connection betw

25、een RF module and motherboard: Connect the M6 point on the component side of the RF PCB and the P4 point on the component side of the motherboard. For this purpose, solder a stranded wire with a length of 10cm between the points M6 and P4. 3.1Supply voltage RF PCB Supply +2.4 VDC via battery contact

26、s POWER“ = ON; (press button for approx. 3 seconds) RF module TP72/GND +5.1VDC to +5.35VDC See page 27 3.2Transmission frequency See 3.1Pilot = OFF“ Mute = Aus Without antenna at TP8/ direkt ground GND Transmission frequency = receive frequency 10kHz See 3.4 Avoiding measuring errors 3.3Measuring /

27、balancing the PLL voltage Attention The buttons S204, S206, S202, and S208 on the motherboard may be damaged, if you press them using sharp-edged or pointed objects (e.g. the tip of a ballpoint pen). Only use objects with end-rounded tips that will not damage the buttons. 3.3.1Centre range limitSee

28、3.1Use TUNE“ to set the centre transmission frequency TP3+2.5VDC to +2.9VDC Balancing via C114 3.3.2Lowest range limitSee 3.1Use TUNE“ to set the lowest transmission frequency TP3+0.9VDC to +2.3VDC Balancing via C114 3.3.3Uppermost range limit See 3.1Use TUNE“ to set the uppermost transmission frequ

29、ency TP3+2.9VDC to +4.2VDC Balancing via C114 3.4Measuring / balancing the RF output power How to avoid measuring errors: 1. Desolder the antenna before starting the measurement. 2. Measure against a direct ground point on TP8. 3. Only use shielded measuring lines with an impedance of 50O and a leng

30、th of 50cm. 3.4.1Mean RF output power See 3.1Spectrum analyser or power measuring device; set centre transmission frequency (ft=fm) Without antenna to TP8 / direct ground GND; Japan: J200 test socket 15mW to 38mW / 12dBm to 15.8dBm Japan: 5mW to 10mW / 7dBm to 10dBm 3.4.2Highest RF output power See

31、3.1Spectrum analyser or power measuring device; set highest transmission frequency (ft=fh) 3.4.3Lowest RF output power See 3.1Spectrum analyser or power measuring device; set lowest transmission frequency (ft=fl) 3.5Nominal deviation LINE AF generator at jack socket (1kHz, 270mV) Set SENSIT“ to -10d

32、B See 3.4.1 24kHzPay attention to the pin assignment of the jack socket: See “Measu- ring set-up” page 10. 3.6Peak deviation LINE AF generator at jack socket (1kHz, 1.08V) Set SENSIT“ to -10dB See 3.4.1 4kHz Japan: 40kHz 3.7S/N ratio referring to peak deviation 24kHz Mod: OFF AF level meter MUTE= ON

33、“ See 3.4.1 60dB(A)eff 3.8THD at nominal deviation See 3.4AF level meter THD measuring Mod: ON See 3.4.10.08% to 1.2% Se- quence Type of measure- ment/adjustment Signal inputDevice settingsMesuring point/ test point Required value Remarks SK 100 G2, SK 300 G2, SK 500 G2 14/2702/2005 3.9Noise voltage

34、 distance Supply +2.4VDC via battery contacts AF level meter; Mod: OFF See 3.4.140 dBunw.peakTap on micro- phone, press buttons, touch housing / antenna 3.10MIC/LINE input level Note Please pay attention to the pin assignment of the jack socket: See “Measuring set-up” page 10. 3.10.1MIC input level

35、at nominal deviation Supply +2.4VDC via battery contacts; AF generator at MIC/LINE: 1kHz: external filter ON: 20Hz and 20kHz 680mV 170mV 42mV 18mV AF level meter PILOT OFF“ Set SENSIT“ to - 30dB - 20dB -10dB 0dB See 3.4.124kHz 3.10.2LINE input level at nominal deviation See 3.9.1; 2100mV 700mV 270mV

36、 120mV AF level meter PILOT OFF“ Set SENSIT“ ti - 30 dB - 20 dB -10 dB 0 dB See 3.4.124kHz 4Measuring the pilot tone 4.1Pilot tone frequency Supply +2.4VDC via battery contacts AF level meter Pilot tone: ON“ See 3.4.132.766kHz 7.6Hz 5Display module Attention The buttons S204, S206, S202, and S208 on

37、 the motherboard may be damaged, if you press them using sharp-edged or pointed objects (e.g. the tip of a ballpoint pen). Only use objects with end-rounded tips that will not damage the buttons. 5.1Visual inspection of all display elements Supply +2.4VDC via battery contacts POWER“ = ON; (press but

38、ton for approx. 3 seconds) 5.2Checking of automatic display deactivation See 5.1See 5.1Backlighting switches off after approx. 15 seconds 5.3Display Battery status Number of bars: 0 Number of bars: 1 Number of bars: 2 Number of bars: 3 See 5.1 1.8VDC to 2.0VDC 2.0VDC to2.3VDC 2.3VDC to 2.6VDC 2.6VDC

39、 to 3.0VDC See 5.1 0 bars 1 bar 2 bars 3 bars Low battery 30 % 70 % 100 % 5.4Display key-lockSee 5.1See 5.1; Use SET“ to activate the key-lock Key symbol is displayed 5.5Display PILOT“See 5.1See 5.1 Use SET“ to activate the pilot tone PILOT symbol ist displayed 5.6Display MUTE“See 5.1See 5.1; Press

40、MUTE“ button MUTE symbol is displayed 5.7Display of audio level See 5.1 AF signal to MIC/LINE See 5.1AF display 5.8AF display at nominal deviation See 3.5 Mod: ON AllAF display = 0“ 5.9AF display at peak deviation See 3.6 Mod: ON AllAF display = full deflection; yellow PEAK LED is on. SK 100 G2, SK

41、300 G2, SK 500 G2 02/200515/27 4.5Reading out / Changing of device data via infrared adaptor 4.5.1Overview You may read out and change data via the infrared adaptor. The Sennheiser service software supports the following tasks you may want to perform: Reading out the current software version and, if

42、 necessary, carrying out of a software update (file *.s19). Commissioning the receiver after a hardware replacement (e. g. replacing of a board). Changing the current frequency table. Changing / resetting the receiverss factory settings. 4.5.2Required hardware You will need the Sennheiser service pa

43、ckage for reading in and out of device data (“See “Special service tools” page 11.“): For portable devices: Infrared adaptor for reading out / in data (e. g. SK 100 transmitter) For stationary devices: RS232/RS485 converter with mains adaptor RS232 cable for connection of PC and converter RS485 cabl

44、e for connection of receiver and converter You may order the service package directly from Sennheiser: Service package for ew G2 software, ID no. 094739, price group 161 4.5.3Required software You may download the service software free of charge from the Sennheiser homepage on the Internet. In order

45、 for you to use the software, you will need the operating system Microsoft Windows 98 or higher and a free COM port (RS232). 4.5.4Information on the service software Operating instructions for the service software are available in PDF format. These operating instructions contain information on commi

46、ssioning of the service package and reading out and in of device data. After installation of the software, you will find the instruction manual in the Windows menu Start. SK 100 G2, SK 300 G2, SK 500 G2 16/2702/2005 4.5.5Commissioning after replacing a board After you have fitted a new board into the device, you have to write the new data (e. g. a new frequency table) to the device. Requirements You have replaced the defective board (e. g. the RF board of the transmitter/receiver), You have installed and launched the service software