Sanyo 18H-815 Service Manual

<18-transistor, 6-bandPortable Radiomove. 18H-815SERVICE MANUAL‘SANYO ELECTRIC CO., LTD.INTERNATIONAL DIVISION: SANYO ELECTRIC TRADING CO., LTD.OSAKA, JAPAN(14) 2SB186A Audio AmplifierALIGNMENT PROCEDURESAM ALIGNMENTSequenceofWaveDialsignal GeneratorConnectionhighsideAlignmentRange|PointeretniesofSignalGeneratorThru. Loop AntennaCdLF.T. T15 1600KC} 455KCLF.T. T14 MW 1600KC} 455KCi.F.T. T13 MW 1600KC; 455KCOscillatorLW LW160KC;160KC”AntennaLW LW160KC}160KCOscillator MW MW 600KCAntenna MW MW 600KCOscillator SW1 SW 1 2.5MCAntenna SWI SW 1 2.5MCOscillator SW2 SW 2 9.0MCAntenna SW2 SW 2 9.0MCOscillator 49m 49m 6.0MCAntenna 49m 49m 6.0MCFM IF ALIGNMENTSPECIFICATIONSFrequency Range---+-++-++ FM 87 - 108 MC (16) 2SB405R Power AmplifierSW1 23 - 73 MC (17) 2SD72R Power AmplifierSW2 8.0 - 22.0 MC 7 (18) 2SC537Z Voltage Stabilizer49m 595 - 7.3 MC Diodes «s+-++++eee- (1) 18553 A.F.C.MW 520 - 1605 KC - €2) 18188 FM Limitera LW 150 - 350 KC (3) 18188 FM A.G.C.‘ oes Frequency::+-+-sree-see- FM 10.7 MC C4) 18188 Discriminator: AM 455 KC (5) 18188 DiscriminatorTransistors -cote (1) 2SC668E FM RF Amplifier (6) SIA3 AM Biasing(2) 2SC545C FM Local Oscillator (7) 18188 AM Detector(3) 28C668C FM Converter (8) SIA3 FM Oscillator Stabilizer(4) 2S8C545E FM ist IF Amplifier (9) SZ-8 Voltage Detector(5) 28C537 FM 2nd IF Amplifier Output Power -------- Maximum 3,000 mW(6) 28CS537 FM 3rd IF Amplifier | Undistorted 2,000 mW(7) 2SA222 AM Converter Power Supply --------- 12 volts, 8xUM-1 (size “D’’ flashlight battery)(8) 28C537 AM Local Oscillator or AC adaptor (D12-815)(9) 28C537E AM 1st IF Amplifier ' Current Drain --------- No signal 30 mA(10) 2SC537 AM 2nd IF Amplifier © Maximum 420 mA(11) 2SD187 Squelch Control Speaker oe ese eceeee scenes 5”x7’ oval type permanent dynamic(12) 2SB303 Audio Amplifier . 4 ohm voice coil impedance(13) 2SB186A Audio Amplifier Cabinet Dimensions ------ 1514”(390mm) wide x 914” (240mm) high( x 484” (240mm) deep(15) 2SB187 Driver Net Weight -----+-++++- 10 ibs. (4.5 kg)Coil ‘Adjust- Patement or12 |°320KC320KCFteeSignal Generator|TrimmerFre- |Modula- IndicationAdjust-ment |quency tionMax. OutputTO ———————Adjustment CurveSequence of Wave | Alignment Testing Equipment ConnectionAlignment Range | Frequency :1 T-6(LF.TOFM10.7MCConnect sweepgeneratorto testpoint TP-1and oscilloscopetotestpointTp-2.2T-5(1.F.T.)FM10.7MC Sameasabove connection.3T-4 (LF.T.)FM10.7MC Sameasabove connection.4. T-7(C.F.T.)|FM-10.7MCConnect sweepgeneratorto test| point to TP-1 an oscilloscope to| test point TP-FM RF ALIGNMENTSequenceofWaveDialsigneoeConnecthigh side ofii=‘GeneratortoAlignment Range |PointeregeueyaeOscillator FM87.0 MC! 87.0 MC| 22.5 KC]Signalgeneratorto TP-1Antenna FM87.0MC/87.0MC| 22.5KC|Signal generatortoTP-1Detune T7 and tune T6 for max. |gain and symmetry of responsecurve.tune T-5 for max. gain and sym-metry of response curve.tune T-4 for max gain and sym-metry of response curve.tune T-7 for symmetry and max.gain of response curve.Coil :Adjust- DialPointermentT-2 104.0 MCSignal GeneratorFreque- |Modula-TrimmerAdjust-mentIndicatorncy tionT-3 104.0 MC | 104.0 MC | 22.5 KC; Ct-2 Max output104.0 MC | 22.5 KC Ct-1 Max outputaaiataa2scialay aoiOOeeeEFiPeee= atacibe,wa.oeeoF

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