Sharp AR-943 Service Manual

MODEL AR-943SPECIFICATIONSFrequency RangeTW CL) aisestetlesiea en ADOC 08 KelZMW OM) cccsinniices 520 1620 KEZSW. CR? cecrermetenes Ds. oe OiPM 4) aiietaanns oo 100 NZIntermediate FrequencyAM (LW/MW/SW) .... 452 kHzPower Output .Und istorted: .ccuees co WMasti: diteatickeetats. -CW.Speaker wu.cesccseeeeee) 12cm round type P.D.S. withspeaker box (CP-27)Voice Coil Imp. 4-ohmPower Supply .........:- DC 12V, Car battery (+ earthchangeable)Dimensions .............:-.--. 16cm (W) xX 5cm (H) x 10.6cm (D)WelSAY nia ntaeiene lee KeControls wucecccccsesceceeeeeeeee Left : ON/OFF (push)-Volume(rotary)Right : TuningBand Selector (push)Tone (push)CP-27GENERAL DESCRIPTIONThe circuitry used in this 4-band (LW/MW/SW/FM) su per-heterodyne system car radio incorporates 9 transistors,16 diodes and 1 IC (integrated circuit).An external car antenna feeds the AM (MW/SW/LW)broadcasting signal to the AM RF amplifier, AM con-verter, 2 IF amplifiers and a diode detector. .An external car antenna feeds the FM broadcastingsignal to the FM RF amplifier, FM mixer, 4 IF am-plifiers and FM detector (2 diodes).The audio signal passes through the IC (audio amplifierand driver circuits), 2-transistor audio output circuit.An AM AVC voltage is fed back to the Ist IF amplifier.An AFC voltage is fed back to the FM oscillator,