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Alinco DR-620, Руководство по обслуживанию, Страница: 4 / 56

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Alinco DR-620 Скачать руководство пользователя страница 4

CIRCUIT  DESCRIPTION

1)  VHF  Reception

Incoming VH F signals  are  passed  through  a  low-pass  filter network, antenna  switching  diodes D20

 

(1SV268),  D19 (1SS355) and  D26 (DAN235E),  and a high-pass filer network, and on to the  RF amplifier

 

Q19  (3SK131).  The  amplified  RF  signal  is  passed  through  another RF  amplifier Q18  (2SC5226)  and

 

band-pass filtered again  by varactor-turned resonators  L46,  L49,  L51  and  D28,  D29,  D30  (all  HVU359),

 

then  applied  to the  1st  mixer Q21  (3SK240)  along with  the  first  local  signal from the  PLL  circuit.

The first local  signal  is generated  between  122.3  MHz and  126.3  MHz by the VHF VCO, which  consists

 

of Q9  (2SK508) and varactor diodes  D10,  and  D11  (both  1SV282) according to the receiving frequency.

 

The  21.7  MHz  first  IF  signal  is  applied  to  monolithic  crystal  filters  XF  and  XF2  (both  Q2175AD20)

 

which  strip  away  unwanted  mixer products,  and  the  IF  signal  is  applied  to  the  first  IF  amplifier Q20

 

(2SC4618).  The  amplified first  IF signal  is then  delivered to the  FM  IF  subsystem  IC  IC3  (TK10931V),

 

which  contains the  second  mixer,  limiter amplifier,  noise  amplifier,  and  FM  detector.

The  second  local  signal  is  generated  by 21.25M Hz TCXO,  producing  the  450  kHz  second  IF  signal

 

when  mixed with  the first  IF  signal within  IC3.

The  450  kHz second  IF  signal  is  applied  to the ceramic filter FL1  (ALFYM450E) which  strips  away all

 

but the  desired  signal,  and then  passes through  the  limiter amplifier within  IC3 to the discriminator coil

 

L101,  which  removes  any amplitude  variations  in  the  450  kHz  IF  signal  before  detection  of speech.

 

The  detected  audio  then  signal  is  amplified  by  IC9  (NJM2902V-B)  passes  through  the  de-emphasis

 

network,  a  high-pass  filter consisting  of  IC9  (NJM2902V-A)  and  associated  circuitry,  and  low-pass

 

filter consisting  and associated  circuitry.  The  filtered  audio  signal  is  switched  by  IC12  (BU4052),  then

 

passes through  the  audio volume  control  IC  IC13  (M511312FP) which  adjusts the  audio  sensitivity to

 

compensate  for audio  level  variations.

The  audio  signal  is  amplified  by  IC8  (LA4425A),  then  applied  to  the  internal  loudspeaker.

4

Содержание DR-620

Страница 1: ...V XA 0573 13 12 NJM2902V TE1 XA0596 13 13 S 80845ALMP EA9 T2 X A 0620 14 14 TK10931V XA0666 14 15 BR24C64F E2 X A 0 66 9 15 16 LC75884W X A 0 8 9 9 16 17 M51132FP X A 0900 17 18 M30620FCAGP XA0913 XA0...

Страница 2: ...on Distortion Microphone impedance 87 500 107 995MHz WFM RX 108 000 135 995MHz AM RX 136 000 173 995MHz RX 144 000 147 995MHz TX 335 000 479 995MHz RX 430 000 449 995MHz TX 87 500 107 995MHz WFM 144 0...

Страница 3: ...ty 6dB 60dB Spurious and image rejection ratio Audio output power 16dBu for 12dB SINAD Double conversion superheterodyne 1s t 21 7MHz 2n d 450kHz VHF 1s t 45 1MHz 2n d 455kHz UHF 18dBu 12kHz 24kHz 70d...

Страница 4: ...ed first IF signal is then delivered to the FM IF subsystem IC IC3 TK10931V which contains the second mixer limiter amplifier noise amplifier and FM detector The second local signal is generated by 21...

Страница 5: ...the desired signal and then passes through the limiter amplifier within IC5 to the discriminator coil L102 which removes any amplitude variations in the 455 kHz IF signal before detection of speech Th...

Страница 6: ...r Q52 2SC5066 along with the 21 7 MHz UHF sub first local signal from the UHF sub VCO The UHF sub first local signal is generated between 408 3 MHz and 428 3MHz by the UHF sub VCO Q13 The 21 7 MHz UHF...

Страница 7: ...A407 and another low pass filter network and then is delivered to the ANT jack 10 UHF Transmit Signal Path The adjusted speech signal from VR4 is delivered to UHF VCO Q29 which frequency modulates the...

Страница 8: ...of FICront CPU IC604 M38503M goes LO which sends the PTT command to the main CPU IC19 When it receives the PTT command pin72 of IC19 goes high to controls local switch D5 filter switch D2 D3 TX switc...

Страница 9: ...6 25kHz comparative reference frequencies which are utilized bythe phase comparator The phase comparator section of IC2 compares the phase between the frequency divided oscillation frequency oftheVCO...

Страница 10: ...ing Input 1 2 Non Inverting Input 1 3 Power supply Minus 4 2 NJM78L05UA XA0098 5V Voltage Regulator 1 OUTPUT 2 COMMON 3 INPUT 3 NJM7808FA XA0102 8V Voltage Ragulator Pin Assignment 1 OUTPUT 2 COMMON 3...

Страница 11: ...Bilateral Switch 4 TC4S66F XA0115 5 AN8010M XA0119 10V Voltage Regulator Test Circuit u u u Output Common Input AN8010M 6 BU4052BF XA0236 Analog Multiplexer Demultiplexer 11...

Страница 12: ...y y 8 TC4W53FU XA0348 Multiplexer Demultiplexer Function Table Control input ON channel INH A L L ch0 L H ch1 H NONE Don t Care 9 TA31136FN XA0404 COMMON 1 8 VDD P INH 2 7 ch0 O i VEE _3_ GO n 6 ch1...

Страница 13: ...5W Audio Power Amplifiers 10 LA4425A XA0410 Test Circuit 1 2 3 4 5 11 NJM2904V XA0573 12 NJM2902V TE1 XA0596 Quad Single Supply Operational Amplifier 13...

Страница 14: ...Pin Assignment BLOCK Diagram Top View o to w X o o o o o 0 c 3 1 o 02 o 3 O S T Q CD D CD CD O O 3 c 3 c r D 13 S 80845ALMP EA9 T2 XA0620...

Страница 15: ...4Kbit EEPR O M ARRAY p b it ADDRESS DECODER h 13bit N SLAVE WORD ADDRESS REGISTER DATA REGISTER START STOP C O N TR O L C IR C U IT I ACK H 4 HIGH VOLTAGE VOLTAGE r 5 GENERATOR DETECTOR a Vcc 7 WP e S...

Страница 16: ...3 3 VSS EZZ T E S T 1 S Q F P 8 0 30 J S 3 2 S 3 1 OSC C Z S 30 RES C Z n S 2 9 d o i n 5 2 9 CE 1 m S 2 7 CL C Z S 2 6 D i c n 3 2 5 P l S l c aoO S 2 4 P 2 S 2 c z 21 3 S 2 3 1 10 20 UUUUUUUUUUUUUUU...

Страница 17: ...m P12 D10 pi 1 D9 P Io Ds PO7 D7 P06 D6 P05 D5 P04 D4 P03 D3 P02 D2 P01 D1 PO0 D0 PIO7 AN7 KI3 PIO6 AN6 KI2 P105 AN5 KM P104 AN4 KIO P103 AN3 PIO2 AN2 PIO1 AN1 AVss PIO0 AN0 Vref _____AVcc _ P97 ADtrg...

Страница 18: ...Serial Communication port forTNC 30 P66 RXD1 I Pulse Serial Communication port forTNC 31 P65 SCLK O Pulse Witer control 32 P64 BUSY O Pulse Witer control 33 P63 TXD O Pulse Serial Communication port...

Страница 19: ...AIN430MHz power OM OFF ii Pii Si4RS O Activ high SUB 144MHz power ON OFF ia PiO aiRS O Actv high Ext band power ON OFF i9 POl 5VS O Actv high 5V power ON OFF a0 P06 CSS O Activ high 5V power ON OFF a...

Страница 20: ...Front C PU 19 M3B5 3M2H667FP X 914 20...

Страница 21: ...ESET RESET I Activ low Reset input i9 Xin XIN I Pulse CPU clock input 2 0 Xout XOUT O CPU clock output 2 1 Vss GND 2 2 Pil V M I Activ low Key input UP 23 Pie RED O Activ high Lighting color ON OFF RE...

Страница 22: ...2 l 5 5V 80 520 M H z Xininputlevel V x in Vcc 2 l 5 5V Fxin 10 25M H z S inew ave 0 4 1 4 V p p X inin p u tfrequency F x in Vcc 2 l 5 5V Vxin 0 4 1 4Vp p 10 25 M H z Equivalent Circuit Fin2 5 a MP...

Страница 23: ...Voltage Regulator TopView 5 4 a _ _ _ a 21 S 816A50AMC XA0925 1 2 3 N o Terminal 1 EXT 2 VSS 3 ON OFF 4 VIN 5 VOUT 22 NJM78M05DL1A XA0947 S X Voltage Regulator 1 INPUT 2 GND 3 OUTPUT 23...

Страница 24: ...23 Transistor Diode and LED Outline Drawings 24...

Страница 25: ...Ta 25 C Parameter Symbol Test conditions Limits Unit Min Max Saturated drain current IDSS Vds 17V Vgs 0V 300 jA Gate to source leakage current IGSS Vds 10V Vgs 0V 5 jA Threshold voltage Vth Vds 12V Id...

Страница 26: ...24 LCD Connection 26...

Страница 27: ...1 2 m 1 2 n S21 Q1 12 f 1 2 e 1 2 d S22 1 1 j 1 1 g 1 1 m 1 1 n S23 SUB 11 f 1 1 e 1 1 d S24 1 0 j 1 0 g 1 0 m 1 0 n S25 DCS 10 f 1 0 e 1 0 d S26 T SQ BUSY 2 W 1 S27 9j 9g 9m 9n S2B minus 9f 9r 9r S2...

Страница 28: ...EXPLODED VIEW 1 Front View 28...

Страница 29: ...2 Bottom View AA0050 29...

Страница 30: ...Chip Transistor RN1107 TE85L 1 1 Q611 XT0095 Chip Transistor 2SC4081 T106R 1 1 Q612 XU0193 Chip Transistor RN1107 TE85L 1 1 R601 RK3566 Chip R ERJ2GEJ224X 1 1 R602 RK3550 Chip R ERJ2GEJ103X 1 1 R603 R...

Страница 31: ...608CH1H390JT AS 1 1 C18 CU3535 Chip C GRM36B102K50PT 1 1 C19 CU3535 Chip C GRM36B102K50PT 1 1 C20 CU4023 Chip C GRM42 6CH101J500PT 1 1 C21 CU3535 Chip C GRM36B102K50PT 1 1 C22 CU3511 Chip C GRM36CH100...

Страница 32: ...1 1 C148 CU3547 Chip C GRM36B103K16PT 1 1 C149 CU3535 Chip C GRM36B102K50PT 1 1 C150 CU3111 Chip C C1608JB1C104KT N 1 1 Ref Parts No Description Parts Name Qty No T E C151 CU3523 Chip C GRM36CH101J50...

Страница 33: ...524 Chip C GRM36CH121J50PT 1 1 C284 CU3504 Chip C GRM36CJ030C50PT 1 1 C285 CU3524 Chip C GRM36CH121J50PT 1 1 Ref Parts No Description Parts Name Qty No T E C286 CU3511 Chip C GRM36CH100D50PT 1 1 C287...

Страница 34: ...U3506 Chip C GRM36CH050C50PT 1 1 C426 CU3503 Chip C GRM36CK020C50PT 1 1 Ref Parts No Description Parts Name Qty No T E C427 CU3535 Chip C GRM36B102K50PT 1 1 C428 CU3512 Chip C GRM36CH120J50PT 1 1 C429...

Страница 35: ...4004 Chip C GRM42 6CH050C300PT 1 C559 CU4006 Chip C GRM42 6CH050C500PT 1 C560 CU4004 Chip C GRM42 6CJ030C500PT 1 1 C561 CU3031 Chip C C1608JB1H471KT AS 1 1 C562 CE0341 Electrolytic C 16MV 100HC TS 1 1...

Страница 36: ...HR10J 1 1 L22 QKA75A Coil QKA75A 1 1 L23 QC0614 Chip Inductor LL1608 FS8N2J 1 1 L24 QKA45E Coil MR3 0 4 5T 0 8 1 1 L25 QA0162 Chip Inductor VCO QA0162 5CBM 1 1 L26 QC0530 Chip Inductor LQN21A22NJ04 1...

Страница 37: ...RN1107 TE85L 1 1 Q47 XT0061 Chip Transistor 2SB1132T 100Q 1 1 Ref Parts No Description Parts Name Qty No T E Q49 XT0138 Chip Transistor 2SC5066 0 TE85L 1 1 Q50 XU0193 Chip Transistor RN1107 TE85L 1 1...

Страница 38: ...GEJ333X 1 1 R65 RK3022 Chip R MCR03EZHJ470 1 1 R66 RK3542 Chip R ERJ2GEJ222X 1 1 Ref Parts No Description Parts Name Qty No T E R67 RK3522 Chip R ERJ2GEJ470X 1 1 R68 RK3001 Chip R MCR03EZHJ000 1 1 R69...

Страница 39: ...550 Chip R ERJ2GEJ103X 1 1 R200 RK3542 Chip R ERJ2GEJ222X 1 1 R201 RK3526 Chip R ERJ2GEJ101X 1 1 Ref Parts No Description Parts Name Qty No T E R202 RK3558 Chip R ERJ2GEJ473X 1 1 R203 RK3561 Chip R ER...

Страница 40: ...Chip R ERJ2GEJ222X 1 1 R342 RK3530 Chip R ERJ2GEJ221X 1 1 R343 RK3522 Chip R ERJ2GEJ470X 1 1 Ref Parts No Description Parts Name Qty No T E R344 RK3522 Chip R ERJ2GEJ470X 1 1 R346 RK3526 Chip R ERJ2GE...

Страница 41: ...574 Chip R ERJ2GEJ105X 1 1 R473 RK3550 Chip R ERJ2GEJ103X 1 1 R474 RK3567 Chip R ERJ2GEJ274X 1 1 Ref Parts No Description Parts Name Qty No T E R475 RK3550 Chip R ERJ2GEJ103X 1 1 R476 RK3572 Chip R ER...

Страница 42: ...R620 4 4 FP0198 SPACER DR620 4 4 KB0089 REAR CASE DR620 1 1 KS0081 BOTTOM CASE DR620 1 1 KZ0147 Front CaseDR620 1 1 NK0072 Knob KL0677A VOL DR135 NK0073 Knob KL0678A DIAL DR135 1 1 NP0139 POWER BUTTON...

Страница 43: ...output is MOD 1KHz 3 5KHz DEV Standard Modulation is also based above Speaker load is 80 and Output is 50 100mV O O Tf J ___ L CN11 SW1 CN10 CN5 II 1I II 1I VR4VR3 VR5 VR7 L102 CN4 8VR9 CN3 CN8 IOOOOO...

Страница 44: ...RX Distortion CH14 87 700 S Meter 1 CH15 87 700 S Meter FULL CH16 146 000 145 000 440 000 435 000 TX Deviation CH17 146 000 145 000 440 000 435 000 TX Deviation NAR CH18 146 000 145 000 440 000 435 00...

Страница 45: ...sensitivity becomes in maximum At 4d B u SINAD more than 12dB S m eter 1 C H 10 146 05M H z SSG 3d B u FR O N T FUNC It is confirmed by the FU N C key S m eter FULL CH11 146 05M H z SSG 15dBu FR O N T...

Страница 46: ...t the Rx sensitivity becomes in maximum Confirm At 8d B u SINAD more than 12dB Rx Signal Sensitivity CH 9 479 95M H z FR O N T FUNC RE601 FUNC Adjust so that the Rx sensitivity becomes in maximum Conf...

Страница 47: ...AF Output N A R R O W 146 05M H z N A R R O W More than Normal Mode SSG Output 60dBu AF Output 87 7M H z More than 2W SSG Output 60dBu 22K H z D E V TE S T ITEM C O N D ITIO N TEST STA N D A R D NO T...

Страница 48: ...5M H z N A R R O W More than Normal Mode SSG Output 60dBu TE S T ITEM C O N D ITIO N TE S T STA N D A R D N O TE TX Output HI P O W ER 430 00M H z 440 00M H z 450 00M H z 35 3W 35 3W 35 3W T TX Output...

Страница 49: ...n 3 n 3 3 C 3 a C a a D O a 4 CD P C BOARD VIEW...

Страница 50: ...3 Main Side A 50...

Страница 51: ...4 Main Side B 51...

Страница 52: ...FRONT SCHEMATIC DIAGRAM M IC C O N N E C T O R CN601 UE0035 MIC PTT DOWN LED R E D 5 V 0 R A N G E 5 V Y E L L O W 0V 52...

Страница 53: ...MAIN SCHEMATIC DIAGRAM _ a a A r t I m a J S3...

Страница 54: ...FRONT BLOCK DIAGRAM M IC R O M O T E E M S 5 7 D O W N S Q L 54...

Страница 55: ...MAIN BLOCK DIAGRAM T OF R O N TU N IT 55...

Страница 56: ...in Dai Building 9th Floor 2 6 1 Chome Dojimahama Kita ku Osaka 530 0004 Japan Phone 81 6 4797 2136 Fax 81 6 4797 2157 E mail export alinco co ip Dealer Distributor Copyright 2002 Alinco lnc Osaka Japa...

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