Kenwood VR 3080 Service Manual - Page 17

A B C D E F G H I J VREF T.METER C18 47P VR1 10K IC1 : LA1837 IC2 : LC72131 IC3 : MC13028AM Q1,3,4,8,9 : 2SC4177(L5,L6) or 1 2SC4116(Y,GR) Q2,12,14,15 : 2SA1611(M5,M6) or 2SA1586(Y,GR) Q10,11 : 2SD1757K SIGNAL LINE GND LINE +B B LINE B B LINE D1 D3,6 D4 D5 D7,8,13,16 D9 : DA204U or MA143A or 1SS302 : RD8.2ES(B2) or MTZJ8.2(B) or : RD5.1ES(B2) or MTZJ5.1(B) or : RD2.7ES(B2) or MTZJ2.7(B) or : MA111 : RD3.3ES(B2) or MTZJ3.3(B) or A1 : TUNER UNIT (X05-503X-XX) D1 L1 C36 C41 0.01 47P R90 680 R41 100K C75 4P 2 L2 1uH (K,P,Y,M,X) TYPE A1 (W02-2622-05) FM FRONT-END 1 ANT1 R3 33K RF AMP R2 0-100 C2 10P FET R4 33K MIX DISTORTION(ST) VT 5 C8 0.1 C4 TR1 IFT IF-OUT 7 3P 27P C7 C6 4P R5 R13 470K- 680 1.2M 1000P L5 C19 D2 C5 180P 0.1 C3 0-8P L1 D1 L4 L3 R1 100K L2 C1 0-8P 2 ANT2 C18 180P 3 GND C9 4 GND 3 0.1 R12 R14 68 +B 6 VCC +B 100 100 R7 OSC R11 C17 OUT 8 R6 D3 3.9K FET : 2SK302 TR1 : 2SC2714 TR2,3 : 2SC2413 D1-3 : HVU202 or 1T362 C12 0-8P L6 C13 R8 10K OSC TR2 100K680K 100P 8P C14 27P TR3 OSC BUFFER 27P 2-6P C10 C15 C16 R10 680-2.2K 10K R9 C20 150P E1 4 J1 FM 75 1 2 GND 3 4 AM ANT 5 (J) TYPE A1 (W02-2621-05) 33K R3 1 ANT1 2 ANT2 3 GND L1 C1 L2 3-10P D4 C18 180P D1 R1 100K RF AMP R2 0-100 C2 15P FET 4 GND FET : 2SK302 TR1 : 2SC2714 TR2,3 : 2SC2413 D1-3 : HVU202 or 1T363 D4 : HSU277 or 1SS356 R6 3.9K L3 C9 L4 0.1 C3 3-10P C19 D2 R4 33K MIX DISTORTION(ST) VT 5 C8 0.1 C4 TR1 IFT IF- OUT 7 5P 27P C7 C6 4P 470K- 680 1.2M R5 R13 1000P L5 C5 180P C10 0.1 R12 100 R14 68 VCC 6 +B 100 R7 R11 C17 OSC 8 10K R8 OSC TR2 100K680K 100P C13 TR3 8P C14 OSC BUFFER 27P C20 D3 180P C12 0-8P L6 R9 10K R10 680-2.2K C15 C16 18P 2-6P VR-3080 (X05-5030-10) DESTINATION COUNTRY U.S.A. CANADA UNIT No. ABB. K 0-10 P BDE NO R23 R25 R29 R53 C24 C25 C26, 78 C30, 31 C49 C77 C79, 80 A1 CF1,2 W56 S1 4.7K YES NO 2.2K 330P 180P YES 0.033 2.2u50 NO 1000P W02-2622 L72-0596 (MS2) NO NO KRF-V7772D (X05-503X-XX) DESTINATION UNIT No. B COUNTRY ABB. DE R23 R25 R29 R53 C24 C25 C26, 78 C30, 31 C49 C77 C79, 80 A1 CF1,2 W56 S1 6 PX Y 0-21 YES 4.7K YES YES 1500P YES YES GENERAL MARKET M NO YES 2.2K 330P 330P YES 2.2u50 W02-2622 L72-0531 AUSTRALIA JAPAN X 0-71 NO 6.8K NO 0.022 NO 1200P (MA5) NO NO J 0-01 YES 4.7K NO 560 0.01 820P NO 4.7u50 W02-2621 CAUTION: For continued safety, replace safety critical components only with manufacturer's recommended parts (refer to parts list). indicates safety critical components. For continued protection against risk of fire, replace only with same type and rating fuse(s). To reduce the risk of electric shock, leakage-current or resistance measurements shall be carried out (exposed parts are acceptably insulated from the supply circuit) before the appliance is returned to the customer. The DC voltage is an actual reading measured with a high impedance type voltmeter as the 7 AM/FM signal generator is specified to the conditions as shown in the list below. The measurement value may vary depending on the measuring instruments used or on the product. The value shown in ( ) is actual reading measured in the AM mode. C42 27P +B C72 1u50 R89 33K C73 47u16 R85 33K R4 680 R6 220 C3 R8 0.01 33 R9 390 R86 33K R87 33K +B C74 1000P CN2 1 2 C31 C79 C30 C80 C25 C20 0.047 C19 10u10 C22 0.047 C21 3.3u35 C24 R23 R42 10K 1.8V 30 (1.7V) 3.7V 29 (3.6V) FM TUNING LEVEL + + C27 W60 R28 C28 6.8K 2.2u50 R27 C29 6.8K 2.2u50 4.7u25 4.3V 18 (4.3V) 3.4V 21 (3.4V) 3.4V 20 (3.4V) 4.3V 19 (4.3V) 3.7V 28 (3.6V) 3.7V 27 (3.6V) 3.7V 26 (3.6V) 0V C23 25 (1.3V) 10u50 0V 24 (1.4V) 3.6V 23 (0.9V) R25 C26 18K 0.018 FM MPX AM SYSTEM + IC1 2.9V (2.9V) + + C37 10u50 + 4.3V (4.3V) R33 1K C38 10u50 + 16 R34 1K 17 22 ALC BUFF AM AM OSC MIX REG AM RF.AMP AGC SD COMP AM IF DET AM S-METER FM S-METER S-CURVE FM IF FM DET AM/FM IF-BUFF TUNING DRIVE STEREO DRIVE GND VCC DECODER ANTI-BIRDIE P-DET STEREO SW MUTE VCO FF FF 304KHz 38K 19K 2 FF 19K 8 PILOT DET 7.0V (7.0V) 15 14 0V (0.2V) 13 1.3V (1.3V) 10 4.3V (0V) 11 0V (2.3V) 12 0V (0V) 6 0V (5.0V) 7 8.2V (8.2V) 8 +B 8.2V R14 (8.2V) 9 100 3.6V (3.6V) 1 8.2V (8.2V) 2 3.6V (3.6V) 3 3.6V (3.6V) 4 0V (0V) 5 R19 8.2K L3 C81 + 1 +B C11 0.047 C10 47u16 +B 0.01 C6 R43 220 IF AMP R5 3.3K R7 820 R10 1K R1 C88 100 3300P + 6.8V C5 0.01 R11 C85 3300P 33 6.2V Q2 C1 1.8V CF1 3300P C84 Q1 3300P CF2 1.1V 1.3V 100 R12 + R44 +B 270 1/4W D8 R15 33K C12 R16 0.047 22 C32 4.7u50 C14 10u50 8.8V (9.2V) L4 + + +B L5 FM DE MPX R17 3.6K C45 22P R82 2.7K C7 47u16 D3 C82 0.01 D13 C15 R18 1u50 3K 7.0V (3.9V) C16 0.47u50 + + + C17 1u50 3.9K R20 + +B R84 3.3K +B +B D5 R81 150 +15V 1W +B C33 0.01 0V C34 0.01 0V B 50uS [75uS] Q3 R31 47K 0V 0V [0.6V] R30 560 Q4 EMPHASIS 75uF: ON 50uF: OFF D BUFFER R68 C59 47 47u16 R67 9.1K C57 2200P R66 9.1K C58 2200P R62 5.6K C69 0.22 C61 33P C60 10P X2 C67 10u50 C68 0.47u50 9 1.0V 10 0.9V 11 0.9V 12 8.1V +B 13 0V 14 0.7V 15 1.6V 16 1.6V C55 10u50 D6 + + R71 220 +B 1/4W W61 Q8 0.9V + 0.9V 1.6V Q9 1.6V 8.1V 8.1V +B + 1/8 VCO AM STEREO DETECTOR SIGNAL QUALITY DETECTOR AGC IF PILOT AMP DETECTOR R69 680K C56 1000P 0V 6 0V 5 1.0V 4 1.0V 3 0.4V 2 0.4V 1 0.7V 8 1.0V 7 D16 C66 C65 10u10 10u10 + + W86 W81 D7 W11 C64 R70 0.01 10K C63 0.47 C62 10u10 IC3 + AM STEREO DECODER W82 R79 3.3K R63 5.6K C54 R64 0.1 20K C53 R65 0.1 20K +15V +15V CN1 15 DET 14 S-LEVEL 13 SD 12 STEREO 11 Rch C91 1 R72 33K C92 1000P R50 470 1/4W 100 R52 R88 56K D4 C46 10u50 15 0V C51 16 2.6V 17 5.2V +B + 2.8V C47 1000P C48 47u16 R51 5.6K + C78 0.022 R53 C49 + 1.1V C50 100P C76 470P 47P R83 1K PLL IC2 20 4.0V 19 1.1V R54 18 1K 22 21 0V 14 REFERENCE DIVIDER PHASE DETECTOR CHARGE PUMP UNLOCK DETECTOR POWER ON RESET 1/2 SWALLOW COUNTER 1/16,1/17 4bits 12bits PROGRAMABLE DIVIDER C 2 B I/F DATA SHIFT REGISTER LATCH UNIVERSAL COUNTER 11.3V (0V) 7 0V 8 7.2V 9 10 11 4.3V 6 0V 5 0V 3 0V 4 2 2.6V 1 C43 22P X1 7.2MHz C44 470P 0V (11.3V) 13 0V 12 0V R56 R55 1K 33K C52 R57 100P 1K R49 10K +B 11.2V +B E 11.4V AM +B Q15 11.3V +B 1.2K R60 12K R61 FM +B Q14 +B 11.3V 10.6V R59 1.2K 10.7V +15V 12K R58 R48 1K 6 R47 3.3K 5 R46 3.3K 4 R45 3.3K 3 W56 +B W83 Q10,11 MUTE 0V Q10 -2.2V 0V 0V Q11 R74 47K 0V -2.2V R73 33K C93 1000P +15V 15V R78 820 D9 R75 8.2K +15V -2.2V T.MUTE DRIVE Q12 3.4V R76 1.8K 5.0V R77 1K +15V CH.SPACE DE-EMPHASIS S1 R29 1K FM: 100kHz 75uS AM: 10kHz C77 100P FM: 50kHz 50uS AM: 9kHz 10 GND 9 Lch 8 +15V 7 -15V X09-A/5 -CN4 3/4 A 6 T. MUTE 4 5 PLL DT 5 4 PLL CLK 3 3 PLL CE 6 2 PLL DO 1 CH.SPACE VR-3080 (1/4) KRF-V7772D (1/4) MODE CARRIER FM 98MHz AM 1000(999)kHz FREQUENCY 1kHz 400Hz MODULATION DEVIATION STEREO 67.5kHz 7.5kHz(Pilot) MONO 30% MOD ANT INPUT 60dB 60dB KRF-V7772D/VR-3080 Y05-3850-10