Sennheiser-EK300IEMG2-rft-sm 电路图 维修手册.pdf

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1、SA 051013 Subject to alterations Sennheiser electronic GmbH 1.5 V or battery pack BA 2015; 2.4 V Nominal voltage _ +2.4 VDC Operating voltage _ +1.8 VDC to +3.0 VDC Switch-off threshold with batteries _ +1.8 VDC with battery pack BA 2015 _ +2.0 VDC Switch-on threshold with batteries _ +1.8 VDC with

2、battery pack BA 2015 _ +2.2 VDC Current consumption at nominal voltage without modulation 129 mA when receiver is switched off_ 250 A Operating time at 2.4 VDC and 2 x 32_ 6 to 10 hours (volume depended) Battery status display_ 100%, 70%, 30%, low battery Programming interface _ internal infrared in

3、terface Temperature range _ -10C to +55C Dimensions in mm_ 82 x 64 x 24 Weight incl. batteries _ approx. 200 g Authorization/ certification to ETSI 300422/301489 Europe_ CE 0682 USA _ FCC ID: DMOB2EUVL Canada _ IC: 2099A-G2SK 2.2AF characteristics Compander _ HDX Deemphasis _ HDX depended Nominal de

4、viation_ 24 kHz Peak deviation (at 1 kHz) _ 48 kHz THD (at nominal deviation, 1 kHz)_ 1% Signal to noise ratio referring to peak deviation _ 100 dB(A) MPX pilot tone Frequency _ 19 kHz Deviation_ 5 kHz EK 300 IEM G2 6/3010/2005 Monitor output Type _ 3.5 mm stereo jack socket Volume controller _ Pote

5、ntiometer/ adjusting knob Output power at 2.4 VDC and 2 x 32 2 x 100 mW Internal resistance _ 20 Nominal impedance _ 32 Frequency range at nominal impedance (deviation 4 kHz, HDX)_ 100 Hz bis 14 kHz (3 dB) Range of the volume controller_ 18 dB Range of the balance adjuster _ L/R 50 dB Level differen

6、ce L/R _ 2 dB Stereo/Focus operating _ adjustable via menu Focus switching _ Forced mono switching after the balance controller, add on switchable via menu) HiBoost_ Increase of the treble frequencies up to +7.5 dB (at 10 kHz), add on switchable via menu 2.3RF characteristics Receiver principle_ Non

7、-Diversity Modulation_ Wideband FM stereo (MPX pilot tone mode), F8W Number of receiving frequencies (tunable in steps of 25 kHz)_ 1440 Frequency ranges_ 518 to 554 MHz 626 to 662 MHz 740 to 776 MHz 786 to 822 MHz 830 to 866 MHz Number of frequency banks with factory-preset channels (presets) _ 8 wi

8、th 12 channels each Frequency bank with freely selectable frequencies (tuneable in steps of 25 kHz) _ 1 bank, 12 channels selectable Switching bandwidth_ 36 MHz Channel grid_ n x 25 kHz Min. channel spacing _ 400 kHz Frequency stability within temperature range_ 20 ppm Intermodulation attenuation (4

9、00 kHz/800 kHz) _ 74 dB/ 78 dB Adjacent channel rejection (400 kHz/800 kHz) _ 75 dB / 80 dB Blocking (f1 MHz) _ 88 dB EK 300 IEM G2 10/20057/30 Squelch Criteria_ RF level and pilot tone Switch-off time _ 2 ms Adjustable in _ 4 steps: OFF, LO (5 dBV), MID (15 dBV), HI (25 dBV) 1. Oscillator frequency

10、_ fe + 241 MHz 1. Intermediate frequency_ 241 MHz 2. Oscillator frequency_ 230.3 MHz 2. Intermediate frequency_ 10.7 MHz Intermediate frequency stability (241 MHz/10.7 MHz) _ 60 dB / 80 dB Sensitivity (with HDX at peak deviation) S/N=52 dBAeff_ 2.5 V S/N=80 dBAeff _ 10 V Image rejection f = 482 MHz_

11、 40 dB f = +21.4 MHz _ 60 dB Spurious signal rejection _ 50 dB Antenna input Antenna impedance_ 50 Receiver interference power at antenna input (30 MHz to 50 GHz) _ 1 GHz: -57 dBm (2 nW) 1 GHz to 5 GHz: -47 dBm (20 nW) Free field interference radiation _ 1 GHz: 52 dB(A) (= 20 dB exter- nal voltage a

12、t tuner output; TP2) With unsoldered antenna and direct ground MH3. The output voltage of the AF module is limited above typical deviation of 45 kHz. 4.3THDSee 2.1; Receiving frequency at TP Antenna via signal generator RF: 1mV; Deviation: 8.55 kHz; Mod: 1 kHz See 4.1 1%, typ. 0.3% 4.4Signal to nois

13、e ratio (referring to peak deviation) See 4.1; Mod: Aus HI-BOOST = OFFSee 4.1100 dB(A) 4.5Squelch levelSee 2.1; Receiving frequency at RF signal generator via TP Antenna Deviation: 8.55 kHz; Mod: 1 kHz RF: +5 dBV RF: +15 dBV RF: +25 dBV PILOT = ON; Volume controller = MIN. SQELCH = LOW SQELCH = MID

14、SQELCH = HIGH See 4.1No AF signal at the AF output MUTE icon is displayed 4.6Pilot tone measurement 4.6.1Pilot toneSee 2.1; RF signal generator at TP ANTENNA; RF-Level: 1 mV FM 1 Deviation: 8.55 kHz Mod: 1 kHz FM2 Deviation: 5 kHz Mod: 19 kHz PILOT = OFF; Volume controller = MAX See 4.18dBu/ 1.94 Ve

15、ff Instead of the FM2 the transmitter SR 300 IEM G2 can be used. Se- quence Type of measure- ment Signal inputSettingsMeasuring point / test point Required value Remarks L R EK 300 IEM G2 10/200517/30 4.6.2Pilot tone OFFSee 2.1; RF signal generator at TP ANTENNA; RF: 1mV FM 1 Deviation: 8.55 kHz Mod

16、: 1kHz FM2 OFF PILOT = OFFSee 4.1No signal 4.7Limiter 4.7.1Limiter offSee 4.1Focus operation; LTD = OFF HI BOOST = ON BALANCE = 0 Lautstrkesteller = MAX See 4.10dBu 4.7.2Limiter onSee 4.1See 4.7.1See 4.1-5dBu 4.8High boost threshold 4.9High Boost OFFSee 2.1; RF signal generator at TP ANTENNA RF: 1 m

17、V; Deviation: 8.55 kHz; Mod: 10 kHz Focus operation; LTD = OFF; HI BOOST = OFF See 4.1At 10 kHz: -15 dBu 4.10High Boost ONSiehe 2.1; HF-Signalgenerator an TP ANTENNA HF: 1 mV; Hub: 8.55 kHz; Mod: 10 kHz Focus operation; LTD = OFF; HI BOOST = ON See 4.1At 10 kHz: -7 dBu 4.11Channel separation 4.11.1S

18、tereo channel separation of right channel Adjust the SR 300 IEM G2 transmitter and the EK 300 IEM G2 receiver to center frequency MODE= Stereo; SENSITIVITY = 0 dB RF: 1 kHz Hub: 8.55 kHz; Mod: 1 kHz RF: 1 mV Supply left AF signal in SR 300 IEM G2 ST-FOC = STEREO; Volume controller = MAX; PILOT = ON

19、LTD = OFF See 4.1 40dB rightThe receiver operates in stereo mode Level diffe- rence: L/R: 2 dB 4.11.2Stereo channel separation of left channel See 4.10.1; Supply right AF signal in SR 300 IEM G2 See 4.10.1See 4.1 40 dB left 5Display module 5.1Visual inspection of all segments of the frequence displa

20、y See 2.1See 2.2All segments are visible 5.2Automatic switch-off of display backlighting See 2.2See 2.2Backlighting switches off after approx. 15 seconds after last activity Se- quence Type of measure- ment Signal inputSettingsMeasuring point / test point Required value Remarks EK 300 IEM G2 18/3010

21、/2005 5.3Battery status display 1.8 VDC to 2.0 VDC 2.0 VDC to 2.3 VDC 2.3 VDC to 2.6 VDC 2.6 VDC to 3.0 VDC See 2.20 segments 1 segment 2 segments 3 segments Low battery 30% 70% 100% The battery recovery is only displayed +2 segments 5.4lock-off displaySee 2.1See 2.2; Turn on the lock-off function v

22、ia SET button key symbol is visible 5.5PILOT displaySee 2.1See 2.2; Turn on the pilot tone via SET PILOT is visible 5.6MUTE displaySee 2.2See 2.2MUTE is visible; writing is accurate AF OUT is muted 5.7Audi level display 5.7.1AF display at nominal deviation Siehe 2.1; 24 kHz; Mod: aus See 2.2All AF s

23、egments AF display = 0 5.7.2AF display at peak deviation Siehe 2.1; 48 kHz; Mod: ein See 2.2All AF segments AF display: full deviation 5.8RF displaySee 2.1; RF: 40 dBV 5 dB See 2.2All RF segments RF display: full deviation 5.9RF displaySiehe 2.1; RF: 26 dBV 5 dB See 2.24 segments Se- quence Type of

24、measure- ment Signal inputSettingsMeasuring point / test point Required value Remarks 30 EK 300 IEM G2 10/200519/30 5.5Reading out / Changing of device data via infrared adapter 5.5.1Overview You may read out and change data via the infrared adapter. The Sennheiser service software supports the foll

25、owing tasks you may want to perform: Reading out the current software version and, if 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 receiv

26、erss factory settings. 5.5.2Required hardware You will need the Sennheiser service package for reading in and out of device data: The service set includes for portable devices: Infrared adapter for reading out / in data For stationary devices: RS232/RS485 converter with mains adapter RS232 cable for

27、 connection of PC and converter RS485 cable for connection of receiver and converter You may order the service package directly from Sennheiser: Service package for ew G2 software, ID no. 094739 5.5.3Required software You may download the service software free of charge: http:/www.se-iparts.de Opera

28、ting instructions for these service software are available in PDF format. These operating instructions contain information on commissioning of the service pakkage and reading out and in of device data. In order for you to use the software, you will need the operating system Microsoft Windows 98 or h

29、igher and a free COM port (RS232). After installation of the software, you will find the instruction manual in the Windows menu Start. EK 300 IEM G2 20/3010/2005 5.5.4Commissioning after reprogramming or replacing a RF board After you have fitted a new board into the device, you have to write the ne

30、w data (e. g. a new frequency table) to the device. Requirements You have replaced the defective board (the RF board or the mainboard) You have arrange a connection betwenn the PC and the receiver You have switch-on all units You have installed and launched the service software Writing of device dat

31、a Perform the following steps: 1. Click the Auto Detect button. Result: Your connected device has been detected. 2. In the Info register, click the EXECUTE ALL button. Result: All device data are read out. If all the data have been read out successfully, the message Success is displayed. Note: If yo

32、u perform individual actions in the Info or Service registers, you have to return the device into the operational status afterwards. For this reason, finally click the Close Device button. 3. Go to the Service register. 4. Click the EXECUTE ALL button. Result: The new device data are written. If all

33、 the data have been written successfully, the message Success is displayed. Result You have successfully written the new data to the device. These new data now correspond to the new factory settings for you device. You will find these data in the directory D:Sennheiserew G2 service package in the fi

34、les Defaults.dat and FreqTable.dat or FreqTableIEM.dat. You will find detailed information in the G2 service softwares online help. After installation of the software, you will find the online help in the Windows menu Start. EK 300 IEM G2 10/200521/30 6Circuit diagrams f2 f1 PLL ANTENNA VCO f2 f1 ST

35、EREO DECODER DISCR. 020903Prl1330 2.MIXER +5.5VU5 10.7MHzLIMITER10.7MHzLIMITER U101 230.3 MHz HDX-EXPANDOR 1.MIXER Y100Q102 Headphone Amp. 241MHz U101U100 PHONE OUT 2x100mW at 32Ohm U101 U18 2x1.5V Batt. (2.4V Accu) +3.3V +5VDIG DC-DC Converter U21 Micro- processor LCD U1 Y102Q100Y103 Q205, Q206,U20

36、0 Q101 U402U12U12/U18 J3 Backlight D4 Q3 UP DOWN SET ON/OFF U3 Q13 +5V U4 U6 + - U12/U18 U13 HDX-EXPANDOR U12U401 U400 R L CPU D230 D130 DEV U19 Hi Boost CPU U14 Hi Boost U18U16 U16 CPU CPU CPUCPU U13 R1 Focus U403 BAL BAL +5.4V +2.9V +2.8V LIMITER LIMITER BPF TPHP HPTP INFRARED TRANSCEIVER HF-Plati

37、ne RF PCB Grundplatine Mainboard SQUELCH SQUELCH Block diagram EK 300 IEM G2 22/3010/2005 RPM873-E4-V U3 GND 1 NC2 VCC 3 GND 4 PW5 RXD6 TXD7 LEDA8 LTC3401 U4 Rt 1 MODE/SYNC 2 Vin 3 SW 4 GND 5 PGOOD 6 Vout 7 FB 8 Vc 9 SHDN 10 30FLZ-SM1-TB J1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23

38、 24 25 26 27 28 29 30 LCD04 LCD18 LCD07 LCD01 BUS_CLK BUS_DAT PWR_OFF PLL_/CS HI_BOOST LIMITER FOCUS DEV_L BAL_/CS RSSI1_LEV AF_ON /MUTE RXD TXD 4MHZ PWR_OFF RXD LCD30 LCD29 LCD28 LCD27 LCD26 LCD25 LCD24 LCD23 LCD19 LCD20 LCD21 LCD22 LCD17 LCD16 LCD15 LCD14 LCD12 LCD13 LCD09 LCD11 LCD10 LCD08 LCD06

39、LCD05 LCD02 LCD03 LCD02 LCD03 LCD04 LCD20 LCD22 LCD28 LCD01 LCD23 LCD24 LCD27 LCD25 LCD26 LCD29 LCD30 LCD19 LCD21 LCD17 LCD08 LCD09 LCD10 LCD11 LCD18 LCD13 LCD15 LCD14 LCD16 LCD12 LCD06 LCD05 LCD07 BUS_DAT PLL_/CS BUS_CLK EE_WP EE_WP 100RJ R11 R12 100RJ R2 2.2MJ R78 2.2MJ R89 22KJ R92 10KJ R93 2.2KJ

40、 R80 100KJ R33 100KJ R82 100KJ R41 100KJ R42 100RJ R44 100RJ R45 1.0MJ R66 100KJ R83 10KJ R59 100KJ R57 100RJ R55 100RJ R56 470RJ R73 10MJ R74 47KJ R107 10MJ R103 10KJ R100 330RJ R108 330RJ R109 1.0MJ R119 220RJ R138 47RJ R97 470KJ R67 100RJ R30 100RJ R98 150RJ R10 150RJ R13 150RJ R14 150RJ R17 4.7K

41、J R27 3.3MJ R25 1.0MJ R29 22KJ R76 22KJ R77 330RJ R96 220KJ R79 4.7KJ R70 15KJ R71 10KJ R72 0.0R R75 150KJ R102 33KJ R106 10KJ R129 1.0MJ R84 * 0.0R R16 0.0R R15 * 1.0MJ R85 1.0MJ R22 * 1.0MJ R23 * 1.0MJ R24 * 0.0R R18 4.7KJ R19 100RJ R20 1.0MJ R28 * +5V +5.5V +5V +5V +5VDIG +4.9VDD +5VDIG +5V +2.9V

42、 +5.5V +5.4V +2.8V +5.5V +5.5V +3.3V +3.3V +5V +5V +3.3V +4.9VDD +4.9VDD +4.9VDD 1.0nK C8 1.0uK C67 1.0uK C66 33nK C1 27pJ C3 10uM C28 1.0nK C21 4.7pB C22 10uM C29 22UM C68 1.0uK C11 100pJ C51 100pJ C53 22pJ C23* 1.0nK C10 1.0nK C15 1.0nK C16 1.0nK C17 1.0uK C9 10nK C12 100pJ C2 27pJ C5 100pJ C13 22

43、pJ C14 4.7nK C4 1SS355 D3 BC847S Q3 BC847S Q3 BC847S Q1 BC847S Q1 BC847S Q10 BC847S Q10 CHIPLED-GRN D4 2.2MJ R90 220KJ R94 1.0MJ R65 1.0MF R110 1.0MJ R101 294KF R111 1.0MJ R112 47KJ R117* 470KJ R118 470KJ R104 4.7KJ R105 47KJ R120 270KJ R121 470KJ R128 180KJ R127 1.0MJ R68 1.0MJ R69 220KJ R125 1.0MJ

44、 R126 220KJ R99 * 22KJ R88 22KJ R87 100KJ R91 4.7MJ R26 1.0MJ R21 CL190SR D1 D2 CHIPLED-GRN GND OUTIN ON/OFFNC NJU7241 U6 2 1 54 3 SI2301DS Q4 SI2301DS Q6 10uM C20 10uM C24 100nK C25 10nK C32* 100nK C31 10nK C35* 100pJ C50 100pJ C52 MBR0520 D5 BAT60A D8 12 +UBATT +2.9V +5V +UBATT BAV99W D6 BAV99W D1

45、0 MPX 4MHZ RSSI1_LEV TXD PILOT AF_ON 10UK L2 150u6V3 C30 2.2uM6V3 C120 4.7uM4V C127 22u L1 1SS355 D7 1SS355 D9 BC857S Q5 BC857S Q5 BC817W Q11 BC847S Q12 BC847S Q12 33u6V3 C6 +BK -BK NTC HM470 L3 HM470 L4 4MHz Y1 P1 3R5 2R5 1 R5 4R4 3R4 2R4 1R4 4R3 3R3 2R3 1R3 1R6 3R1 1R8 3R8 2R1 1R1 2 R9 4 R9 3 R9 4

46、R8 2R8 2R7 3R7 4R7 4R5 2R6 3R6 4R6 1R7 BC817W Q14 M2 BC850BW Q13 4MHz Y2* S1 S2 S3 S4 LADE-KONTAKT-R P2 1 P2 2 LADE-KONTAKT-R P2 3 P2 4 GND OUTIN RN5RL5ATR U5 1 23 VSS VIN VOUT R3111N30 U2 1 3 2 +4.9VDD MC68HC908LJ24 U1 BP3/FP0 1 PTD5/KBI5/T2CLK 2 FP1 3 FP2 4 FP3 5 FP4 6 FP5 7 FP6 8 FP7 9 FP8 10 PTD6/KBI6/SCL 11 PTD7/KBI7/SDA 12 FP9 13 FP10 14 PTE0/FP11 15 PTE1/FP12 16 PTD3/SPSCK/CALOUT 17 P