alinco dr620 维修手册 英文版
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15) BR24C64F-E2 (XA0669) ........................................ 15 16) LC75884W (XA0899) ............................................. 16 17) M51132FP (XA0900) .............................................. 17 18) M30620FCAGP (XA0913/XA0949) ................... 17~19 19) M38503M2H667FP (XA0914) ........................... 20~21 20) M64076AGP (XA0915) ........................................... 22 21) S-816A50AMC (XA0925) ........................................ 23 22) NJM78M05DL1A (XA0947) .................................... 23 23) Transistor, Diode, and LED Outline Drawings .... 24~25 24) LCD Connection ............................................... 26~27 EXPLODED VIEW
DR-620
Service Manual
CONTENTS
SPECIFICATIONS 1) GENERAL ................................................................ 2 2) TRANSMITTER ........................................................ 2 3) RECEIVER ............................................................... 3
Front Unit ......................................................... 30~31 LED Unit ................................................................. 31 Main Unit .......................................................... 31~42 Mechanical Parts .................................................... 42 Packing Parts .......................................................... 42 Accessories (Screw Set) ......................................... 42 ADJUSTMENT 1) Adjustment Spot ..................................................... 43 2) Adjustment Mode .................................................... 44 3) VHF Adjustment Specification ................................. 45 4) UHF Adjustment Specification ................................ 46 5) VHF Test Specification ............................................ 47 6) UHF Test Specification ............................................ 48 PC BOARD VIEW 1) Front Side A ............................................................ 49 2) Front Side B ............................................................ 49 3) Main Side A ............................................................ 50 4) Main Side B ............................................................ 51 FRONT SCHEMATIC DIAGRAM .............................. 52 MAIN SCHEMATIC DIAGRAM .................................. 53 FRONT BLOCK DIAGRAM ....................................... 54 MAIN BLOCK DIAGRAM ........................................... 55
10) UHF Transmit Signal Path ......................................... 7 11) VHF Tx APC Circuit .................................................. 7 12) UHF Tx APC Circuit .................................................. 8 13) VHF PTT Circuit ........................................................ 8 14) UHF PTT Circuit ....................................................... 8 15) VHF PLL ................................................................... 8 16) UHF PLL ................................................................... 9 17) Power-on Circuit ....................................................... 9 SEMICONDUCTOR DATA
1) Front View ............................................................... 28 2) Bottom View ............................................................ 29 PARTS LIST
1) M5218FP (XA0068) ................................................ 10 2) NJM78L05UA (XA0098) ......................................... 10 3) NJM7808FA (XA0102) ............................................ 10 4) TC4S66F (XA0115) ................................................ 11 5) AN8010M (XA0119) ................................................ 11 6) BU4052BF (XA0236) .............................................. 11 7) TA75S01F (XA0332) ............................................... 12 8) TC4W53FU (XA0348) ............................................. 12 9) TA31136FN (XA0404) ............................................. 12 10) LA4425A (XA0410) ................................................. 13 11) NJM2904V (XA0573) .............................................. 13 12) NJM2902V-TE1 (XA0596) ...................................... 13 13) S-80845ALMP-EA9-T2 (XA0620) ........................... 14 14) TK10931V (XA0666) ............................................... 14
ALINCO,INC.
SPECIFICATIONS
1wenku.baidu.com GENERAL
Frequency coverage DR-620T (U.S amateur)
DR-620E (European amateur)
CIRCUIT DESCRIPTION 1) VHF Reception ......................................................... 4 2) UHF Reception ......................................................... 5 3) FM Reception ........................................................... 5 4) V/V (VHF-VHF) Dual Reception ................................ 6 5) U/U (UHF-UHF) Dual Reception ............................... 6 6) VHF Squelch Control ................................................ 6 7) UHF Squelch Control ................................................ 6 8) Transmit Signal Path ................................................. 7 9) VHF Transmit Signal Path ......................................... 7