Lenovo 7718 Personal Computer User Manual
Contents
1. APHEX MUSIC BRIDGING Au Be G U La MUSIC GND CONTACT TEL IN RING RING Figure I TPU Input Connections Ba TEL A balanced isolating transformer input for a telephone line is provided A 600 ohm telephone line mav be connected to the TEL terminals If two conductor shielded wire is used connect the shield to the adjacent GND ground terminal which is to the left of the TEL terminals MIC BAL amp MUSIC MUTE A low impedance balanced microphone can be connected to the screw terminals marked MIC BAL Use two conductor shielded wire and connect the shield to the adjacent GND terminal Connect the MUSIC MUTE terminals to the switch on the microphone for microphone muting of the music channel MUSIC IN A wide range of HI Z background music sources can be con nected to the TPU amplifier Connect the source to either the MUSIC RCA jack or MUSIC IN screw terminals TEL RING amp CONTACT RING The night ringer can be activated either by a 90V ring signal or from a dry contact closure To activate the night ringer using the ring signal connect the sig nal to the TEL RING terminals To activate the night ringer using contact closure connect a pair of normally open dry contacts customer supplied and installed in the telephone system to the CONTACT RING terminal and adjacent GND terminal RINGER TONE As shipped a steady ringing tone will be heard as long as the dry contacts remain closed To produce a pulse tone2. LED remains ON Controls APHEX The APHEX control on the front panel adjusts the mix of the Aphex effect with the audio signal Clockwise rotation of the control maximizes the effect Counterclockwise rotation mini mizes the effect To turn the Aphex circuit on or off use the slide switch located in the connections bay See INPUT CONNECTIONS Treble amp Bass The BASS control provides 9dB of boost and cut at 100Hz The TREBLE control provides 9dB of boost and cut at OKHz Rotate controls clockwise to boost and counterclockwise to cut TEL INPUT VOX Voice Operated SENS The VOX SENSitivitv control should be set so that only the desired signal is above the threshold level while noise or unwanted signal is below it When an input signal such as voice is detected the music channel will be muted To adjust the sensitivity of this circuit Rotate the control fully clockwise While making a page announcement and talking at a low level the sound should not be choppy nor missing parts of words If it is choppy or if intelligibility is poor rotate the control counterclockwise to the point where the sound is clear and crisp but not to the maximum counterclockwise position 2 If the background music shuts down when no page is in progress rotate the control clockwise until the music is restored VARIABLE MUSIC MUTE The MUSIC MUTE control adjusts the mute level of the background music when using the tele
3. Telephone Paging Amplifiers MODELS TPU 35B TPU 60B TPU 100B INSTALLATION amp OPERATING INSTRUCTIONS BOGERI COMMUNICATIONS INC Description Congratulations on your purchase of a BOGEN TPU B Series Telephone Paging Amplifier The TPU B Series represents the continuing evolution of the popular TPU Series Telephone Paging Amplifiers The amplifiers supply the full range of features already found in the TPU Series and incorporate exciting new features that further define the state of the art of telephone paging The feature set of the TPU B Series amplifiers includes Three Models Power Levels Available TPU 35B 35 Watts TPU 60B 60 Watts and TPU 100B 100 Watts Inputs for 600 ohm balanced telephone line LO Z balanced microphone and background music source e Choice of outputs 16 ohm 25VCT 25V or 70V outputs balanced or unbalanced e Choice of RCA jack or screw terminals for Music source unbalanced e Volume controls for Tel channel MIC Music and Ringer e Ringer circuit activated by contact closure or 90V ring signal e Variable music mute with adjustable Mute level control e Signal activated paging channel with VOX sensitivity and ALC adjustments Aphex Aural Exciter Circuit with on off switch and effect adjustment Bridging jacks supplied to double number of inputs and outputs Output RCA jack to line matching tranformer WMT IA The frequency response on the pa
4. ging or microphone channels is 1dB from 70Hz to 15KHz Distortion is less than 1 from 80Hz to I5KHz Hum and noise from 20Hz to 20KHz is 70dB or better on the music and page channels and 55dB or better on the microphone channel Bass response is adjustable 9dB at 100Hz Treble response is adjustable 9dB at OKHz both 2dB The amplifier operates from a 120V AC source and is protected by a circuit breaker electronic overload protection and by reset table thermostat CAUTION Connect only to PBX system incorporating isolation from telecom network ATTENTION Raccorder seulement a un systeme PBX independant du reseau de telecommunication Unpacking The amplifier was carefully checked before leaving the factory inspect the shipping container and unit closely for improper han dling If the unit has been damaged make an immediate claim to the distributor from whom it was purchased If the unit was shipped directly to you save all packaging material notify the carrier immediately and place a claim The following installation instructions are for use by qualified service personnel only To avoid an electric shock hazard do not perform any functions requiring removal of the cover of the amplifier unless you are qualified to do so To prevent fire or shock hazard do not expose this unit to rain or moisture Power and Grounding The AC line cord has a three prong plug which must be plugged into a three wire grou
5. it is necessary to remove the cover and place the jumper located at J1 in the P Off position WARNING This procedure requires removal of the amplifier cover To avoid an electric shock hazard do not perform this procedure unless you are qualified to do so APHEX The Aphex Aural Exciter circuit is controlled by the on off switch located in the input connections bay When the switch is in the on position the harmonics that are usually lost in the amplification process are regenerated and added to the audio signal This results in increased presence and clarity increased intelligibility greater perceived loudness without adding extra power and reduced listener fatigue BRIDGING JACKS Two TPU amplifiers may be bridged together to double the num ber of inputs and outputs Connect a single conductor shielded cable terminated in an RCA phono plug at each end between the BRIDGING jacks of the two amplifiers The cable should not be more than 20 feet in length Output Connections Output connections are housed in the connections bay accessi ble by removing the right hand cover panel on the front of the amplifier Loosen the hold down screws on the panel and slide the panel up to remove Knockouts are provided on the panel to admit wiring Be sure to replace the cover and secure the hold down screws after making connections Figure 2 TPU Output Connections Bay Speakers Speaker systems can be connected directly t
6. nded outlet It is important to ground the amplifier If necessary have an electrician ensure that the outlet is grounded The POWER LED illuminates when power is applied to the unit Installation The TPU Series is designed for surface wall mounting When mounting the unit avoid proximity to heat sources Allow space for terminal wiring access to controls and adequate air flow for heat dissipation Amplifiers are heavy where possible secure the unit to wall studs or a suitable back brace Use self fasten ing or molly type hardware on hollow sheet rock type walls Four 6 x 3 4 screws are provided with the unit to mount to solid wall stock Hold the amplifier to the wall and trace the inside edge of the top keyhole mounting holes Set the amplifier down and locate the top two screws in position 13 1 2 apart Secure them to the wall allowing the screw heads to protrude 1 8 to 1 4 Fit the chassis over the screw heads and position the bottom two screws Complete the mounting of the amplifi er by tightening all screws securely Input Connections The TPU B Input connections and Aphex On Off switch are housed in the Input Connections Bay accessible by removing the left cover panel on the front of the amplifier Loosen the hold down screws on the panel and slide the panel up to remove A knockout is provided on the panel to admit wiring Be sure to replace the cover and secure the hold down screws after mak ing connections
7. ntilation Bogen Service The TPU amplifier is covered by a 2 year warranty If you encounter difficulty with your TPU amplifier please do not hesi tate to ask our advice or assistance Information can be obtained by calling our Application Engineering Department or Factory Service Department at 201 934 8500 If you are shipping the unit for a warranty repair pack it in the original shipping container or similar container and send the unit fully insured and prepaid via any responsible carrier Include a letter stating the problem and proof of purchase showing the purchase date The amplifier will be promptly repaired and returned to you freight prepaid while in warranty BOGEN COMMUNICATIONS INC 50 Spring Street Ramsey NJ 07446 201 934 8500 54 9213 01 0809
8. o the speaker out put terminals The amplifier provides outputs at 16 ohm 25VCT 25V and 70V and is shipped for use with unbalanced svstems Connect one lead to the terminal corresponding to the imped ance of the speaker svstem and the other to the COM and GND terminals on the output terminal strip For balanced svstems remove the link between COM and GND Additional Power Amplifier An external power amplifier can be used with the TPU amplifier You must modify the output circuitry of the telephone amplifier by adding a resistor network as illustrated below Connect a patch cord to the high level high impedance input of the boost er amplifier TO 25V OUTPUT TERMINAL OF TPU 35B 60B 100B TO HI Z INPUT OF 39K BOOSTER AMPLIFIER 1 2W u 10K 1 2W TO COM ON TERMINAL STRIP WMT IA Connect a Bogen WMT IA accessory to the RCA jack labeled WMT IA in order to feed a 600 ohm telephone line LO Z input or balanced Mic input of another amplifier Refer to the instruc tions furnished with the WMT IA accessory for full information Operation Power Plug the amplifier line cord into a suitable outlet The POWER LED will illuminate once power is applied to the amplifier The unit remains in a power standby condition after power is applied PEAK LEVEL The PEAK LEVEL LED will illuminate if the amplifier is driven into clipping Adjust the output level of MIC VOLUME PAGE VOLUME MUSIC VOLUME or RINGER VOLUME if the PEAK LEVEL
9. ormal position and speak softly yet distinctly into the mouthpiece Adjust the TEL VOLUME control to the desired output level uy Speak in a loud voice directly into the handset mouthpiece while rotating the ALC control clockwise to the point where the output of the amplifier is reduced to the same level as that obtained in Step 2 To vary the overall volume without disturbing the ALC adjust ment use the TEL VOLUME control Maintenance CAUTION There are no user serviceable parts within the amplifier Have all internal servicing performed by a qualified techni cian The warranty may become void if repairs are per formed by anyone other than the Bogen Factory Service Department Circuit Breaker If the circuit breaker trips the POWER LED will go out and there will be no output Unplug the AC line cord Remove the cover of the output connections bay and press the red Circuit Breaker button to reset it Replace the cover and plug the line cord back into the outlet If the breaker trips again have the trouble investigated by qualified personnel Thermal Protection If the thermal protection activates there will be no audio out put but the POWER LED will remain on Wait approximately five minutes for the amplifier to cool If the amplifier overheats again investigate the cause of the over temperature condition This may be due to improper connections at the output terminals or excessive environmental heat due to inadequate ve
10. phone paging channel This control differs from the MUSIC MUTE terminals which mute background music during a microphone page See Input Connections The fully counterclockwise position results in maximum muting The fully clockwise position results in minimum muting RINGER VOLUME Adjust to the desired level clockwise to increase counter clockwise to decrease the level MUSIC VOLUME The MUSIC VOLUME control adjusts the volume of background music Rotate the control counterclockwise to decrease the level Rotate the control clockwise to increase the level MIC VOLUME The MICVOLUME control adjusts the microphone level Rotate the control counterclockwise to decrease the level Rotate the control clockwise to increase the level TELVOLUME This control adjusts the telephone paging level It does not affect the microphone level Rotate the control counterclockwise to decrease the level Rotate the control clockwise to increase the level ALC The telephone paging channel has an ALC circuit that maintains constant output level regardless of input variations in the vary ing voice levels of persons using the system The ALC is factory set and adjustments are not normally required If ALC is required set the ALC control using the directions below I Turn off the ALC by rotating the control fully counterclock wise N Set the TEL VOLUME control to the highest level likely to be required Hold a telephone handset in a n
Download Pdf Manuals
Related Search