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DR-620
Service Manual
CONTENTS
SPECIFICATIONS 15) BR24C64F-E2 (XA0669) ........................................ 15
1) GENERAL ................................................................ 2 16) LC75884W (XA0899) ............................................. 16
2) TRANSMITTER ........................................................ 2 17) M51132FP (XA0900) .............................................. 17
3) RECEIVER ............................................................... 3 18) M30620FCAGP (XA0913/XA0949) ................... 17~19
CIRCUIT DESCRIPTION 19) M38503M2H667FP (XA0914) ........................... 20~21
1) VHF Reception ......................................................... 4 20) M64076AGP (XA0915) ........................................... 22
2) UHF Reception ......................................................... 5 21) S-816A50AMC (XA0925) ........................................ 23
3) FM Reception ........................................................... 5 22) NJM78M05DL1A (XA0947) .................................... 23
4) V/V (VHF-VHF) Dual Reception ................................ 6 23) Transistor, Diode, and LED Outline Drawings .... 24~25
5) U/U (UHF-UHF) Dual Reception ............................... 6 24) LCD Connection ............................................... 26~27
6) VHF Squelch Control ................................................ 6 EXPLODED VIEW
7) UHF Squelch Control ................................................ 6 1) Front View ............................................................... 28
8) Transmit Signal Path ................................................. 7 2) Bottom View ............................................................ 29
9) VHF Transmit Signal Path ......................................... 7 PARTS LIST
10) UHF Transmit Signal Path ......................................... 7 Front Unit ......................................................... 30~31
11) VHF Tx APC Circuit .................................................. 7 LED Unit ................................................................. 31
12) UHF Tx APC Circuit .................................................. 8 Main Unit .......................................................... 31~42
13) VHF PTT Circuit ........................................................ 8 Mechanical Parts .................................................... 42
14) UHF PTT Circuit ....................................................... 8 Packing Parts .......................................................... 42
15) VHF PLL ................................................................... 8 Accessories (Screw Set) ......................................... 42
16) UHF PLL ................................................................... 9 ADJUSTMENT
17) Power-on Circuit ....................................................... 9 1) Adjustment Spot ..................................................... 43
SEMICONDUCTOR DATA 2) Adjustment Mode .................................................... 44
1) M5218FP (XA0068) ................................................ 10 3) VHF Adjustment Specification ................................. 45
2) NJM78L05UA (XA0098) ......................................... 10 4) UHF Adjustment Specification ................................ 46
3) NJM7808FA (XA0102) ............................................ 10 5) VHF Test Specification ............................................ 47
4) TC4S66F (XA0115) ................................................ 11 6) UHF Test Specification ............................................ 48
5) AN8010M (XA0119) ................................................ 11 PC BOARD VIEW
6) BU4052BF (XA0236) .............................................. 11 1) Front Side A ............................................................ 49
7) TA75S01F (XA0332) ............................................... 12 2) Front Side B ............................................................ 49
8) TC4W53FU (XA0348) ............................................. 12 3) Main Side A ............................................................ 50
9) TA31136FN (XA0404) ............................................. 12 4) Main Side B ............................................................ 51
10) LA4425A (XA0410) ................................................. 13 FRONT SCHEMATIC DIAGRAM .............................. 52
11) NJM2904V (XA0573) .............................................. 13 MAIN SCHEMATIC DIAGRAM .................................. 53
12) NJM2902V-TE1 (XA0596) ...................................... 13 FRONT BLOCK DIAGRAM ....................................... 54
13) S-80845ALMP-EA9-T2 (XA0620) ........................... 14
MAIN BLOCK DIAGRAM ........................................... 55
14) TK10931V (XA0666) ............................................... 14
ALINCO,INC.
SPECIFICATIONS
1) GENERAL
Frequency coverage 87.500 - 107.995MHz (WFM RX)
DR-620T (U.S amateur) 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)
DR-620E (European amateur) 87.500 - 107.995MHz (WFM)
144.000 - 145.995MHz (RX, TX)
430.000 - 439.995MHz (RX, TX)
Operating mode 16K0F3E (Wide mode) 8K50F3E (Narrow mode)
Frequency resolution 5, 8.33, 10, 12.5, 15, 20, 25, 30, 50, 100kHz
Number of memory channels 200
Antenna impedance 50 unbalanced
Power requirement 13.8V DC