Sennheiser SK 500 G2 Manuel utilisateur

SA 280205

Subject to alterations

Sennheiser electronic GmbH & Co. KG • 30900 Wedemark

Phone: +49 (5130) 600 0 • Fax: +49 (5130) 600 300 1/27

SK 100 G2

SK 300 G2

SK 500 G2

Service manual

Short description

The SK x00 G2 bodypack transmitter has 8 channel banks with up to 20

preset channels (presets) and one freely adjustable frequency bank. With a

switching bandwidth of 36MHz 1440 frequencies can be selected in the

UHF band.

Features

•Pilot tone squelch for interference-free operation

•Mute function

•HDX compander system

•Charging contacts integrated in transmitter (does not apply to SK 100 G2)

•Backlighting of display with one keystroke

•Battery status display

•Robust metal housing

•Key-lock function

300

SK 100 G2 SK 300 G2 SK 500 G2

SK 100 G2, SK 300 G2, SK 500 G2

2/27 02/2005

Safety requirements

Observe safety regulations.

Observe ESD instructions while handling electrostatically endangered components.

Only skilled persons are allowed to alter and repair. For repairs and exchanges only

approved components according to the current spare parts list are allowed.

For safety and certification reasons it is forbidden to alter the product without

authorisation. Otherwise, the person who has altered the product is liable for any

consequential damage.

repairs/exchanges The following instructions for overhaul and testing must be followed.

In case of unusual problems please contact your Sennheiser distributor.

For safety reasons unauthorised modifications and changes are not permitted.

SK 100 G2, SK 300 G2, SK 500 G2

02/2005 3/27

Content

1 Controls and indicators..................................................................................4

2 Technical data.................................................................................................5

2.1 General.................................................................................................................... 5

2.2 AF characteristics.................................................................................................. 6

2.3 RF characteristics.................................................................................................. 7

3 Exploded view.................................................................................................8

4 Test and alignment instructions ............................................................... 10

4.1 Measuring and test equipment ....................................................................... 10

4.2 Measuring set-up................................................................................................ 10

4.3 Special service tools ........................................................................................... 11

4.4 Test table ............................................................................................................. 12

4.5 Reading out / Changing of device data via infrared adaptor.................... 15

5 Circuit diagrams........................................................................................... 17

Block diagram...................................................................................................................17

Mainboard, circuit diagram, part 1/3 .......................................................................... 18

Mainboard, circuit diagram, part 2/3 .......................................................................... 19

Mainboard, circuit diagram, part 3/3 .......................................................................... 20

RF board, circuit diagram, part 1/2.............................................................................. 21

RF board, circuit diagram, part 2/2.............................................................................. 22

Mainboard, interconnector assignment, part 1/2..................................................... 23

Mainboard, interconnector assignment, part 2/2..................................................... 24

RF board, interconnector assignment.......................................................................... 25

Mainboard, printed circuit board, solder side ............................................................ 26

Mainboard, printed circuit board, component side................................................... 26

RF board, printed circuit board, component side ...................................................... 27

RF board, printed circuit board, solder side................................................................ 27

SK 100 G2, SK 300 G2, SK 500 G2

4/27 02/2005

1 Controls and indicators

쐃

쐋

쐏

쐂

쐄

쐈

쐉

쐊

쐎

쐆

쐇

씈

쐅

쐃







쐇







Transmitter elements

쐃Microphone and line input

(MIC/LINE)

쐇Antenna

쐋Operation and battery status

indication, red LED (ON/LOW BAT)

쐏Audio peak indication,

yellow LED (AF PEAK)

쐄Charging contacts

(not SK 100 G2)

쐂SET button (also save function)

쐆/ rocker button (UP/DOWN)

쐊Battery compartment

쐎Battery compartment cover

쐅Unlocking button

쐈ON/OFF button

쐉LC display

씈MUTE switch

Display elements

쐃Alphanumeric display of the

transmit frequency

쐇Symbol for channel bank and

channel number

쐋Frequency unit

쐏7-step level display for audio

signal „AF“

쐄„MUTE“ display (audio input is

muted)

쐂„PILOT“ display (pilot tone

transmission is activated)

쐆Lock mode icon (lock mode is

activated)

쐊4-step battery status display

SK 100 G2, SK 300 G2, SK 500 G2

02/2005 5/27

2 Technical data

2.1 General

Power supply voltage __________________ 2 batteries, type mignon AA; 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 consumption

at nominal voltage________________ ≤170mA

with transmitter switched off _______ ≤250µA

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 ____________________ -10°C to +55°C

Dimensions in mm_____________________ 82 x 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

6/27 02/2005

2.2 AF characteristics

Audio input LINE / MIC _________________ jack socket; 3.5mm

AF transmission 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

Line __________________________ ≥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

02/2005 7/27

2.3 RF 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 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

Harmonic emissions ___________________ ≤1µW

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 ³10cm ______________ ≥36dB

Nominal deviation _____________________ ±24kHz

Peak deviation (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 deviation within switching

bandwidth___________________________ 75dB(A)eff

SK 100 G2, SK 300 G2, SK 500 G2

8/27 02/2005

3 Exploded view

022

004

005

009

013

012

006

011

023

014

008

SK 500 G2)

(SK 300 G2,

(SK 100 G2)

016

010

007

015

017

008

022

002

003

002

001

018

020

019

SK 500 G2)

(SK 300 G2,

SK 100 G2, SK 300 G2, SK 500 G2

02/2005 9/27

Pos Description

001 Housing complete

002 Lens screw

003 Clamp

004 Cover, LCD

005 Cover, LOW BAT

006 Cover, infrared

007 SK 100 G2: plug right

SK 300 G2 / SK 500 G2: double charging contact

008 SK 100 G2: plug left

SK 300 G2 / SK 500 G2: single charging contact

009 Battery cover

010 Axle

011 Antenna

012 PCB RF

013 Battery case

014 PCB mainboard

015 LC display complet

016 Flat cable, 20 pin

017 Slide button, black

018 Rocker switch, black

019 Knob

020 Shielding cup

021 Label

022 Lens screw

023 Slottet nut

SK 100 G2, SK 300 G2, SK 500 G2

10/27 02/2005

4 Test and alignment instructions

4.1 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 infrared adaptor. See also chapter “Reading

out / Changing of device data via infrared adaptor” on page 15.

4.2 Measuring set-up

Laboratory

DC IN

AF IN

230.00 MHz

AF generator

RF OUT

Spectrum analyzer

AF level meter

230.00 MHz

MIC

LINE

GND

PC with service software ew G2

Frequency counter

Multimeter

RF power meter

SK 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 phone jack

- If you feed in the LINE signal you have to ground the MIC connector of the phone jack.

Autres manuels pour SK 500 G2

Ce manuel convient aux modèles suivants

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