STAV-3250 AM/FM Stereo Receiver (310-3021) Features Faxback Doc. # 31989 The Optimus STAV-3250 Digital Synthesized A/V Surround Receiver combines 100 watts per channel of clean power with efficient, high-performance circuitry. This lets the receiver accurately reproduce any program source and drive almost any home speaker system. The Dolby Surround Sound helps to deliver movie theater sound for any A/V program source (especially sources encoded with Dolby Surround Sound signals). The hall effect sound simulates the sound of a live concert, adding extra richness to your music programs. The stadium effect sound creates a special reverberation for an expansive, outdoor sound. You can connect a CD player, a turntable, two cassette decks, three audio/video devices, and a video monitor to the receiver. This remarkable versatility makes the receiver a perfect control center for your home audio/video system. Your receiver also includes the following features: Station-Name Display - lets you set the receiver to display the names of radio stations whose frequencies you store in memory. 30 Memory Presets - lets you store and recall up to 30 radio frequencies and station names in memory. Five-Band Graphics Equalizer - lets you adjust the levels of specific frequency ranges for a customized sound, and shows you the shape of the levels you set. Alpha-Numeric Display - shows the radio frequency, preset memory number, program source, signal strength, and other information. Front-Panel Audio/Video Jacks - let you quickly connect a VCR, camcorder or other audio/video device for convenient playback or dubbing. VCR DUBBING Button - lets you copy a video cassette tape from one VCR to another. Tape Copying - lets you copy cassette tapes for your personal use from one deck to another, even while you listen to another program source. Digital-Synthesized Tuner - allows exceptionally precise radio tuning. Low Distortion - ensures superb sound quality even when you see the amplifier's full power. MONO/FM MUTE OFF Button - lets you reduce signal noise when you use the amplifier's full power. FM Signal Overload Protection - reduces the possibility of overloading by strong local FM signals. Protection Circuits - help prevent damage to the receiver by turning off the amplifier if it approaches being overheated or overdriven or if a power surge or short circuit occurs. Note to the Cable TV System Installer: This reminder is provided to call the CATV system installer's attention to article 820-40 of the NEC (National Electrical Code) that provides guidelines for proper grounding and, in particular, specifies that the cable ground shall be connected to the grounding system of the building, as close to the point of cable entry as practical. GRAPHIC EQUALIZER Your receiver includes a high-performance five-band graphic equalizer equipped with four memory positions that let you store your own equalizer patterns. Equalizer Level The receiver's equalizer level buttons let you adjust the level of each frequency (60 Hz, 250 Hz, 1 kHz, 4 kHz, and 16 kHz) up and down within a range of ± 10 dB. To store your own equalizer patterns in memory, follow these steps: 1. Press EQ under PRESET KEY MODE. 2. Press the EQUALIZER LEVEL buttons (Up-arrow and Down-arrow) to set the level for each frequency. 3. Press MEMORY and within 5 seconds, press any of the equalizer preset buttons (A to D). 4. To recall a preset equalizer pattern, press an equalizer preset button. The selected equalizer pattern appears on the display. To bypass the equalizer, press EQ DEFEAT,. DEFEAT appears on the display. SLEEP TIMER You can set the receiver to automatically turn off after 30, 60, or 90 minutes. To start the sleep timer, press SLEEP TIMER until the desired turn-off time (30, 60, or 90) appears on the display. LOUD BUTTON The LOUD button lets you select a factory-set equalizer pattern to improve the sound by boosting certain frequencies when you listen at low volume levels. Press EQ under PRESET KEY MODE. Then, press 1/LOUD. The equalizer setting appears on the display. DISPLAY MODE BUTTON The DISPLAY MODE button lets you select either a spectrum analyzer display or a steady equalizer level display. The equalizer (EQ) mode is useful when you adjust and confirm the equalizer settings. The spectrum analyzer (SP A) mode shows the spectrum of the combined left and right channels for all five frequencies. MUTING Button Press MUTING to decrease your speakers' volume level by 20 dB. The VOLUME control indicator flashes while the muting function is on. To turn off the muting function, press MUTING so that the VOLUME control indicator lights steadily. BALANCE Control The BALANCE control lets you adjust the sound balance between the left and right speakers for speakers pair A and B. If you properly position the speakers and your listening area is centered between the speakers, the center setting of the control is usually best. For an unusual speaker placement, adjust BALANCE as follows: 1. Listen to any program source. 2. Press MONO/FM MUTE OFF so that MONO appears on the display. The sound is monaural instead of stereo, so each speaker delivers the same output. 3. Adjust the BALANCE control until the sound seems to be coming from a point halfway between the two speakers in either pair. 4. Press MONO/FM MUTE OFF so that MONO disappears from the display (if desired). PROTECTION CIRCUITS Your receiver has two special protection circuits and a protection indicator. The thermal overload protection circuit automatically turns off the receiver's amplifier if it approaches overheating. The overdrive protection circuit automatically turns off the amplifier if it is close to delivering too much power. If either of these situations occurs, PROTECTION appears on the display. If the amplifier turns off, check to be sure the ventilation holes on top of the receiver are clear of obstructions, and check your speaker connections and speaker impedance. Remember, do not use both pairs of speakers at the same time if either pair has an impedance of less than 8 ohms. CAUTION: To prevent the protection circuits from being reactivated after the amplifier turns on, reduce the volume by half. If one of the protection circuits turns off the receiver's amplifier, it should turn back on within 30 minutes. INPUT BALANCE CONTROL The INPUT BALANCE on the back panel lets you adjust the balance of left and right levels that are input to the Dolby Surround circuit. 1. Press DOLBY so that the arrow on the display points to '[X]' DOLBY. Then, set SURROUND LEVEL to the minimum level. 2. Press SPEAKERS A and SPEAKERS B to the OUT position to turn off both pairs of speakers. 3. Adjust INPUT BALANCE to reduce the level of the monaural sound (voice) as desired. REPLACING THE FUSE Your receiver has a fuse that helps protect the receiver from power surges and short circuits. If the receiver does not work, check the fuse to see if it is blown. To check and replace the fuse, follow these steps: 1. Use a Phillips screwdriver to unscrew the fuse compartment cap on the back of the receiver. 2. Pull out the fuse compartment cap and remove the old fuse. 3. If the fuse's center wire is broken or the glass covering is a light brown color, replace the fuse with an identical 6-amp, 250-volt fuse available at your local Radio Shack store. CAUTION: Never use a fuse that has a higher rating than 6 amps/250V. 4. Replace the fuse compartment cap. If the fuse is not blown, it is possible that one of the protection circuits has been activated. (See "Built-In Protection Circuits".) (02/19/96)