Owner’s mcmuai Advent Model 300 FM Stereo Receiver
Contents W/o shoc baard do nt eXP .
ON OFF POWER Make all connections with Power switch OfL Introduction Placement Thank you for your purchase of the Advent Model 300 FM Stereo Receiver. If you have not already done so, please take a moment to com plete the warranty registration card and mail it (postage will be paid by Advent). The serial number is located on the bottom of the Model 300 as well as on the warranty card. Place the Model 300 on a hard surface, taking care not to obstruct the free flow of air beneath the receiver.
___ ___ ___ Loudspeaker connections 2 Make all speaker con nections with the Power switch Off. When connecting speaker wires to the speaker terminals, make certain that no wires or splayed wire filaments can short two speaker terminals together, or a speaker terminal to the receiver’s chassis. Do not connect the “hot” (red) speaker terminals directly together. Should any of the above conditions occur while operating the Model 300, damage may result requiring service not covered under the warranty.
Phasing When connecting a pair of speakers it is important that both speakers be connected in the same way. For example, if your speaker ter minals are labelled 0 and 8, and one speaker’s 0 terminal is connected to one receiver channel’s black terminal, the other speaker should be connected identically to the other channel. All speaker cords are coded in some way, such as by ribs running down the insulation of one of the cord’s two wires, to help make the connections identical for each channel.
Source connections CAUTION—TO PREVENT ELECTRIC SHOCK. DO NOT RE MOVE COVER NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL ADVENT CORPORATION CAMBRIDGE, MASSACHUSETrS 0 PUSH TO RESET SWITCHED 20 SAC AS HZ 00 A W MODEL NO 300 DESIGN CERTIFIED AS COMPLYING WItH P.C C RULES PART 15C IN EFFECT AT DATE OF MANUFACTURE S.
Turntable connection The Phono jacks are for connecting a turntable with a magnetic car tridge. Be sure that the phono plugs are firmly seated and that the connecting cables are posi tioned well away from any AC power cords to prevent hum pickup. If your turntable has a ground wire running from its chassis, connect it to the Ground termi nal screw below the Phono jacks on the rear panel. Tape deck connection For tape playback, con nect the output jacks of the deck to the Tape in jacks of the Model 300.
Operating controls U 96 “‘ ,G_000 TAPE MONITOR 00 LOUDNESS On MONO STEREO O MUTING Ofl 94 ON 98 100 \\ + 104 / I 92\ SPEAKERS 102 ADVE\T 106 / MODEL 300 90 108 88 AUG TUNED PUONO VOLUME BALANCE BASS TREBLE PHONES POWER Power Turns the receiver On and Off. It is nor Stereo indicator Lights when tuner receives a mal for the Model 300 to make a thumping noise when it is turned On or Off. station broadcasting a stereo signal.
Balance Adjusts the relative volume of left and Bass and Treble Boost or reduce bass and or right channels for proper stereo balance. Rota tion to the left of the central position reduces right channel output; rotation to the right from the central position reduces left channel output. treble on both channels simultaneously. Loudness In the On position, boosts bass and treble to provide a more pleasing tonal balance when listening at low volume.
Notes on operating the Model 300 Volume The relationship between the Volume setting and power output of the Model 300 is not linear. Setting the Volume control at half rota tion does not mean that you are using half the power of which the receiver is capable. For example, if there is no signal input, there will be no power output, no matter what the Volume setting.
Response in dB + 10 +5 0 —10 20 100 1000 00 Frequency in cycles per second in perceived tonal balance ci musical material that occur when listening at lower volume lev els. At louder listening levels, smaller rotations of the controls can effectively adjust for some room effects, the tonal balance of your loudspeakers, or deficiencies in program mate rial. For example, voice broadcasts can some times be made more intelligible by reducing Bass and boosting Treble.
Contact your dealer or Advent for service in! or mation. However, should you find it necessary to have the Model 300’s fuses replaced by a serv ice station not authorized by Advent, the follow ing information is important. Make certain that the power supply cord is dis connected before changing fuses. For contin ued protection, replace fuses only with others of the same type and value. Fuses are located in fuse holders on the main circuit board, directly behind the Bass and Treble controls.
FM reception and antennas OFF ON MUTING Muting As you tune to FM broadcasts with the Muting circuit On, the annoying rushing sounds between stations are suppressed, and listenable broadcasts “pop” into range. Be aware, however, that rapid rotation of the tuning knob may cause you to miss stations, as high perform ance muting circuits are then unable to act fast enough to distinguish them. Therefore, you should tune slowly while searching out stations.
The first and simplest potential improvement is to replace the short-wire whip antenna with TV “rabbit ears” connected to the two Antenna ter minals of the receiver. Use the simplest and cheapest antenna of this type you can find, because more elaborate versions may actually perform less well on FM signals than the sim plest models. Extend each ear as close to 30 inches as the antenna and space permit, and arrange them as close to horizontal as conven iently possible.
Using additional equipment with the Model 300 Connecting an additional pair of loudspeakers If you wish to use a second pair of speakers, connect them to the B speaker terminals of the Model 300 as you connected the A speakers to the A terminals. The Speaker On Off switches allow you to listen to either pair individually or both pairs simultaneously. For simultaneous listening, at least one pair of speakers must be of 8 ohms or greater imped ance.
POWER AMP IN 1A 1 OUT 1 R IN TAPE OUT L R Using a separate power amplifier with the Model 300 Because of the very high perform ance of its tuner and preamplifier, the Model 300 is appropriate for use as a tuner preamp with even the most elaborate separate power ampli fiers.
Troubleshooting guide Connecting other equipment A variety of accessory devices can be connected to the Model 300, such as Do1by system and other noise reduction units, 4-channel decoders, fre quency equalizers, and ambience synthesizers. Such devices connect to the Tape inputs of the Model 300, or may be installed between the Model 300’s preamp and power amplifier by removing the wire straps on the back panel.
Troubleshooting guide Symptom Possible cause Powerindicator doesn’t light, no sound, power switch is On Possible solutions AC line unplugged. AC line cord plugged into a switched outlet which is not live, Circuit breaker tripped. No sound, Power indicator light is On. Speaker switch(es) Off. Speakers disconnected, either at rear of receiver or at rear of speakers. Tape monitor switch In. Plug in. Switch on power to outlet, or plug line cord into outlet that is always live.
Symptom No sound, continued Possible cause External program source disconnected. Internal protective fuses blown. Sound from one channel only. One speaker disconnected, either at rear of receiver or at rear of speaker. Balance control set at one extreme Connecting cable for one channel of an external source disconnected. Defective cable connecting external source to Model 300. One channel of external source is dead. Possible solutions Check connections from external source, and reconnect securely.
18 Symptom Possible cause Possible solutions Sound from one channel only, continued Monophonic external source connected to one input jack of Model 300. Wire strap connecting one channel of Preamp in to Power amp out disconnected. Switch to Mono mode. Music sounds harsh or distorted. Amplifier “clipping”. During FM listening, station not correctly tuned. During FM listening, “multipath” interference due to signals reflected off buildings. In Phono mode, dust ball on stylus.
Symptom Radio frequency interference (RFI). Possible cause In Phono mode only, phono cables p.cking up broadcasts from nearby radio transmitter(s). In all modes, speaker cables picking up broadcasts from nearby radio transmitter(s). Poor FM reception. Antenna disconnected. Antenna not positioned for optimum reception and or tangled in other wires. Difficult reception area.
20 Symptom Static during FM reception, due to auto ignitions or to appliances, Possible cause Station not correctly tuned. Weak signal. Antenna located too close to street. Intermittent FM reception. Station too weak for consistent reception with the antenna that is in use. Hum occurs during Phono operation, either drowning out or interfering with sound. Poor Phono cable connection to receiver. Phono connecting cables picking up hum from AC power cords.
Symptom Hum, continued Possible cause Ground wire from turntable to receiver disconnected. Contininuous background buzz interferes with sound during Phono operation Phono connecting cables picking up TV signals. This occurs frequently near TV transmitters. Feedback ioop occurs when the phono cartridge resonates from loudspeaker vibrations which are then reproduced through the speakers. Howling noise, increasing in volume, occurs as Volume or Bass boost is increased in Phono mode.
Limited warranty In case of difficulty For a period of three years from the date of orig inal purchase, Advent will repair any defect in workmanship or materials that occurs in normal use without charge for parts or labor. If you suspect a defect in your Model 300 Receiver, return it to the dealer from whom it w purchased so that he can verify the complaint and arrange for servicing if necessary.
Owner’s record “Authorized Return” label we will provide you in our response. After the unit has been repaired, it will be returned freight prepaid. For your convenience and protection, we sug gest that you fill in the information indicated below, so that you have an easily accessible record of the purchase of your Model 300 Stereo FM Receiver.
Advent Corporation 195 Albany Street Cambridge, Massachusetts 02139 (617) 661-9500 Design: Roger Sametz
Advent Corporation 195 Albany Street Cambridge, Massachusetts 02139 (617) 661 9500 8K 776 Printed in USA 85-954-048
