User manual SENNHEISER HME 410-1

[. . . ] 39 Spare parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 Replacing the wind screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 Replacing the ear cushions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 Connector assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] Do not attempt to repair the headset yourself. If problems occur, contact your Sennheiser agent for assistance. Only replace parts of the headset whose replacement is described in this manual. All other parts of the headset must be replaced by your Sennheiser agent. For information on how to clean the headset, contact your Sennheiser agent. · · · 27 Headset features HME 100 headset · · · · · · · · · New passive headset with excellent noise attenuation Excellent comfort due to very low weight, soft ear cushions and padded headband as well as best possible freedom of movement due to unilateral connecting cable Foldable headband for easy and space-saving storage Clear communications due to MKE 45-1 electret microphone with adjustable sensitivity (sensitivity adjustment must be carried out by authorized personnel) Microphone can be easily positioned and worn on either left or right side due to flexible microphone boom with quick-fixing device Optimum radio reception due to headphone systems with wide frequency response Integrated volume control Adaption to the aircraft intercom system via Mono/Stereo switch Made in Germany, two-year warranty 28 Product variants HME 410-1 headset The HME 410-1 differs from the HME 100 in the following features: · No Mono/Stereo switch · Connection of headphones and microphone via XLR-5 plug HME 120 headset The HME 120 differs from the HME 100 in the following features: · No Mono/Stereo switch · Coiled cable · Connection of headphones and microphone via U-174/U jack plug to a high impedance interface in the helicopter 29 HMD 120 headset The HMD 120 differs from the HME 100 in the following features: · No Mono/Stereo switch · Coiled cable · M-87/AIC dynamic microphone and low impedance headphones · Connection of headphones and microphone via U-174/U jack plug to a low impedance interface in the helicopter 30 Delivery includes HME 100, HME 410-1 and HME 120 headsets · · · · Headset Padded carry and storage bag with shoulder strap for headset and accessories Wind screen for microphone Cable clip MZQ 2002-1 (Cat. 4470) HMD 120 headset · · · Headset Padded carry and storage bag with shoulder strap for headset and accessories Cable clip MZQ 2002-1 (Cat. 4470) Recommended Accessories · Replaceable gel ear cushions (Cat. 83140) 31 Preparing the headsets for use Connecting the headsets HME 100 headset: 1 1 Connecting cable for HME 100 /4" (6. 35 mm) stereo jack plug for connecting the headphones PJ-068 jack plug for connecting the microphone Connect the 1/4" (6. 35 mm) stereo jack plug for the headphones and the PJ-068 jack plug for the microphone to the corresponding jack sockets of your intercom. 1 HME 410-1 headset: 1 XLR-5 plug for connecting the headphones and the microphone Connect the XLR-5 plug for the headphones and the microphone to the XLR-5 socket of your intercom. Connecting cable for HME 410-1 32 HME 120 and HMD 120 headsets: 1 U-174/U jack plug for connecting the headphones and the microphone Connect the U-174/U jack plug for the headphones and the microphone to the U-174/U socket of your intercom. Connecting cable for HME 120 and HMD 120 33 Adjusting the headband For good noise attenuation and best possible comfort, the headband has to be adjusted to properly fit your head: Wear the headset so that the headband runs over the top of your head. Adjust the length of the headband so that · your ears are completely inside the ear cushions, · you feel even, gentle pressure around your ears, · a snug fit is ensured. Note: Make sure not to squeeze any connecting cable when adjusting the headband. Squeezing can damage the connecting cables. Due to its noisecompensating pick-up pattern, the microphone can be used from either side. 39 Spare parts The following spare parts are available from your Sennheiser agent: · Wind screen for MKE 45-1 electret microphone · Cable clip · Carry and storage bag with shoulder strap · Ear cushions Replacing the wind screen If the wind screen for the electret microphone shows signs of wear such as tears or holes, replace the wind screen. Pull the wind screen from the microphone. Gently slide-on the new wind screen and ensure that it fits securely over the microphone. Replacing the ear cushions Replace the ear cushions if they are damaged. Grasp behind the ear cushions and pull them up and away from the earcups. Slide the new ear cushions onto the earcups. For best results replace the ear cushions after 100 hours of use or two years. 40 Connector assignment ; ;;;;;;;;;;;;; ;;;;;;;;;;;;; 2 1 3 4 5 solder side 1 2 3 4; U174/U jack plug 1 2 3 4 Microphone Lo Audio Hi Microphone Hi Audio Lo XLR-5 connector 1 2 3 4 5 Audio Hi Audio Lo Microphone Hi Microphone Lo -- 1 2 3 1 2 3 1 /4" (6. 35 mm) stereo jack plug Audio Hi left Audio Hi right Audio Lo PJ-068 jack plug 1 2 3 Not assigned!Microphone Hi Microphone Lo 41 1 2 3 In case of difficulty If problems occur that are not listed in the below table, please contact your Sennheiser agent. Problem Communications in one ear only (HME 100 only) Possible cause and what to do You are using a stereo intercom system but the headset is set to mono operation. Set the Mono/Stereo switch to `Stereo'. You are receiving a mono source but the headset is set to stereo operation. Set the Mono/Stereo switch to `Mono'. [. . . ] Reduced intelligibility The microphone connection has been pulled out. Check to see if the microphone jack plug is correctly connected. 42 Problem Microphone output voltage too high or too low Possible cause and what to do Re-adjust the output voltage on the microphone. To do so, use a small slotted screwdriver and turn the `Mic Gain Adjustment' screw (see illustration on page 38) until you have reached the desired setting. 43 Technical data HME 100 Headphones Transducer principle Ear coupling Frequency response Nominal impedance Attenuation Contact pressure dynamic circumaural, closed 45­15, 000 Hz 150 , mono, 300 , stereo > 10­40 dB approx. 10 N HME 410-1 and HME 120 HMD 120 150 , mono 16 , mono Microphone incl. [. . . ]