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Photos and specs Sony XR-4950X |
manual abstract
The D-bass function boosts the low frequency signal and high frequency signal with a sharper curve than conventional bass boost. You can hear the bass line more clearly even while the vocal volume remains the same. You can emphasize and adjust the bass sound easily with the D-BASS button. Adjusting the bass curve Press (d-bass) repeatedly to select the desired bass curve. As the D-BASS number increases so does the effect. D.BASS-1 t D.BASS-2 t D.BASS-3 t D.BASS-OFF (cancel) Note The bass sound may distort at same volume. If the bass sound distorts, select less effective bass curve. 14 Additional Information Maintenance Fuse replacement When replacing the fuse, be sure to use one matching the amperage rating stated on the original fuse. If the fuse blows, check the power connection and replace the fuse. If the fuse blows again after replacement, there may be an internal malfunction. In such a case, consult your nearest Sony dealer. Fuse (10 A) Warning Never use a fuse with an amperage rating exceeding the one supplied with the unit as this could damage the unit. Cleaning the connectors The unit may not function properly if the connectors between the unit and the front panel are not clean. In order to prevent this, open the front panel by pressing (OPEN), then detach it and clean the connectors with a cotton swab dipped in alcohol. Do not apply too much force. Otherwise, the connectors may be damaged. Back of the front panel Notes • For safety, turn off the engine before cleaning the connectors and remove the key from the ignition switch. • Never touch the connectors directly with your fingers or with any metal device. Dismounting the unit 1 Press the clip inside the front cover with a thin screwdriver, and pry the front cover free. 2 Repeat step 1 on the left side. The front cover is removed. 3 Use a thin screwdriver to push in the clip on the left side of the unit, then pull out the left side of the unit until the catch clears the mounting. 4 Repeat step 3 on the right side. 5 Slide the unit out of the mounting. 15 Specifications Outputs Speaker impedance Maximum power output Speaker outputs (sure seal connectors) 4 - 8 ohms 50 W x 4 (at 4 ohms) Cassette player section Tape track 4-track 2-channel stereo Wow and flutter 0.08 % (WRMS) Frequency response 30 - 18,000 Hz Signal-to-noise ratio 58 dB Tuner section FM Tuning range 87.5 - 108.0 MHz Aerial terminal External aerial connector Intermediate frequency 10.7 MHz/450kHz Usable sensitivity 8 dBf Selectivity 75 dB at 400 kHz Signal-to-noise ratio 66 dB (stereo), Harmonic distortion at 1 72 dB (mono) kHz Separation 0.6 % (stereo), 0.3 % (mono) 35 dB at 1 kHz Frequency response 30 - 15,000 Hz AM Tuning range 531 - 1,602 kHz Aerial terminal External aerial connector Intermediate frequency 10.7 MHz/450 kHz Sensitivity 30 ^V Power amplifier section General Outputs Tone controls Power requirements Dimensions Mounting dimensions Mass Supplied accessories Optional accessories Audio output Power aerial relay control lead Power amplifier control lead Telephone ATT control lead Bass ±9 dB at 100 Hz Treble ±9 dB at 10 kHz 12 V DC car battery (negative earth) Approx. 178 x 50 x 183 mm (w/h/d) Approx. 182 x 53 x 162 mm (w/h/d) Approx. 1.2 kg Parts for installation and connections (1 set) Front panel case (1) Rotary commander RM-X4S Design and specifications are subject to change without notice. 16 Troubleshooting guide The following checklist will help you remedy the problems you may encounter with your unit. Before going through the checklist below, check the connections and operating procedures. General Problem Cause/Solution No sound. • Cancel the ATT function. • Set the fader control to the centre position for two-speaker systems. • Rotate the dial clockwise to adjust the volume. The contents of the memory • The power cord or battery has been disconnected. have been erased. • The reset button was pressed. —— Store again into the memory. Indications do not appear Remove the front panel and clean the connectors. See in the display. "Cleaning the connectors” (page 15) for details. Tape playback Problem Cause/Solution The sound is distorted. The tape head is contaminated. —— Clean the head with a commercially available dry-type cleaning cassette. The AMS does not operate • There is noise in the space between tracks. correctly. • A blank space is too short (less than four seconds). • A long pause, or a passage of low frequencies or very low sound level is treated as a blank space. Radio reception Problem Cause/Solution Preset tuning is not possible. • Store the correct frequency in the memory. • The broadcast signal is too weak. Automatic tuning is not • The broadcast signal is too weak. possible. —— Use manual tuning. • The local seek mode is set to ON. —— Set the local seek mode to OFF (page 10). The stations cannot be Connect a power aerial control lead (blue) or access...