Electrovoice-EV1122-int-sm维修电路图 手册.pdf

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1、Effi76ice. EI.ECTFICIIIICEi SEFIVICE MANUAL THIS SERVICE MANUAL COVERS ELECTRO.VOICE MODELS: FM STEREO BECEIVER E-V 1180 FM STEREO TUNER E-V 1159 STEREO AMPLIFIER E-V 1122 ELEETFICl-VCllCEr INE A Subsidiary of Gulton 1ndLt517iss, lnc 5OO ccclt St., Buchanan, Mlchigan 49107 Litho in u. s. A,Form No.

2、1406 RadioFans.CN INTRODUCTION This service manual was designed with the technician in *inO. tt has been kept as brief as possible without over-simplification. All procedures are presented in a clear it*p-Uv-ttp manner. Althaugh we have tried to anticipate all of youi problems and questions, in spec

3、ial instances vou- *uv need additional guidance Address anv such SPECIFICATIONS inquiries to our Technical Service Department The sheets are punched to fit a three-ring binder so that any production changes and additional service tips can be easity added. This will keep your Electro-Voice Service Da

4、ta as uPtodate as Possible. TUNER SECTION tE-v 11S0 Channel Separation: SCA Rejection: Audio Output (EV1159): .5 volt Pet channel at |AA%modulation and full quieting StereolMono Switching: A11 electronic and automatic StereoIndicator: - Panel light indicates presence of stereo bloadcast regardless o

5、f Pull/nlono switch Antenna Input: Tern:inals for 300 ohm FM aotenna SERVICING PROCEDURE TEST EOUIPMENT 1. FM signal generator, tuning 88-108.MHz modulated + 75 kHz. Attenuator accurate down to 1 i;v 2. FM Multiplex generator (98 MHZ .cirrier or equivalent with caiiuiaieo nr livel and modulation) 3.

6、 Audio VTVM 4. DCVTVM 5. Oscilloscope 6. Harmonic Distortion AnalYzer POWER OUTPUT AND HARIVIONIC DISTORTION (E-V 1.22 lf the unit is completely out of alignment, additional signal level may be required to obtain a good output level. Signal level may be reduced as receiver sensitivity is improved. 7

7、. Adjust the bottom slug of the ratio detector transformer for maximum output. 8. Adjust the lop, then bottorn slugs of l.F. transformers on the l.F. pcb asserirbly ineluding slugs of transformr T2 (located in FM tuning unit) for maximum output consistent with a well-balancd signal on oscilloscope.

8、9. Adiust the antenna coil T1 in the FM tuning unit for maiimum output, Dial pointer should be setting at 9O MHz. 10. Tune the signal generator and FM tuner to 106 MHz. Adiust the antenna, interstage and oscillator TR trimmers in the FM tuning unit for maximum output. Dial pointer should be setting

9、at 106 MHz. 1 1 , Repeat steps 9 ; i: rri A i I C O*z ID 270 -t -l -l T I iF 3.3 t( 5MF l5 v. RadioFans.CN T SIDE FM TUNER ASSEMBLY E-V 1159 JF Transformer-lF Flesistor-S.6 k()7,w 1 o7o R esistor-270 IY,W 11 O/1 Resistor-l kOY.W ( 1 Ol) Transformer-Ratio Oetector Capacitor-Ceramic 330 PF Resistor-6.

10、8 ksl,%w ( 1 07o) Resisrqr-l 50 SlY.w ( t oYo) Capacitor-ElectrotYtic 5 PFl1 5V Resistor*33 ktrl%w (10% Resistor-33o kcl%w 1 07o) Choke-90 1trl Capacitor-Ceramic 4 PF Diode 1N34) Resistor-1O kr%w (10%) Transistor 2N35881 l.F. AssembtY-ComPlete Terminal (Malco) Capacitor*Flat Foil .1 PF RadioFans.CN

11、MATCHED FAIR MATCHED PAR c Lr t_, d d 8+ PEC r-iz?-*1r-*-1 IN .oor MF t8K SCA ALUE SCHEMATIC RadioFans.CN MULTIPLEX PC BOARD AS$EMBLY E.V 1159 Tr-Td,r*o*o, -i irf- s* I ; -l r-. o :-l gMF - rfi-5-ue* i &ef i+ I RadioFans.CN OUTPUT PC BOARD ASSEMBLY (E-V 1159 oNLY) X.RAY VIEW - COIVIPONENT SIDE PARTS

12、 LIST REF. NO. I 2 J PART NO. 85131 27259 43067 42391 4693 4ii045 4667 46149 46028 4676 4236s 4 5 6 7 I I 10 11 DESCRIPTION Output Drivsr Assembly-Complete Terrninal Malcol Diode-Power Capaeitor-E lectrolytic 640 lE l25V Resistor-l kSl,%W ( 1 07ol Transistor (SE4002l Resistor-l80 O%w (lo7o) Resistor

13、-1 50 Sr,y,w 1 0% Resistor*39o kSl,Y,W (1 0%l Flesistor*2.2 kSl%W ( 1 0/o) Capacitor-E lectrolytie 5 trtrl 1 0V Capacitor-Electrolytic 1 0OO lF/ 1 6V Besistor-1 o0 kS,%W (1 oyo) +18 v + r3,SV 42383 4695 E H 0 Jr J 5C.1 12 13 K + T 640tfi MF ro/r5 tl E 2.2K x 5Mr root( B sE4002 IK c IH 5E SCHEMATIC 1r RadioFans.CN