Alinco_DR-735_E_T_TA_serv.pdf

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1、1 DR-735 T / E / TA Service Manual CONTENTS 18) NJM2288 (XA1694). 12 19) NJU72341 (XA1695) . 12 20) BH2221FV (XA1696) . 12 21) HT16C24 (XA1705). 13 22) RA60H4047M1 (XA1706) . 13 23) BR24G1MF (XA1715). 13 24) Transistor, Diode and LED Outline Drawing. 14 25) LCD Connection (EL0064). 14 EXPLODED VIEW

2、1) Front View. 15,16 2) Main Side .17-19 PARTS LIST FRONT Unit.20-21 MAIN Unit.22-30 SPEAKER Unit. 31 MECHANICAL Unit. 31 PACKING Unit. 31 ADJUSTMENT 1) Required Test Equipment. 32 2) Adjustment Spot. 33 3) Connection Diagram . 33 4) UHF TX Adjustment Specification. 34 5) UHF RX-R Adjustment Specifi

3、cation. 34 6) VHF RX-R Adjustment Specification. 35 7) VHF TX Adjustment Specification . 35 8) VHF RX-L Adjustment Specification. 36 9) UHF RX-L Adjustment Specification. 36 10) UHF TX Test Specification . 37 11) VHF TX Test Specification. 37 12) LEFT RX Test Specification. 38 13) RIGHT RX Test Spec

4、ification . 38 14) X BAND Test Specification. 39 PC BOARD VIEW FRONT TOP SIDE. 41 FRONT MIDDLE SIDE. 42 FRONT BOTTOM SIDE . 43 MAIN TOP SIDE. 44 MAIN MIDDLE SIDE . 45 MAIN BOTTOM SIDE. 46 SCHEMATIC DIAGRAM FRONT Unit. 47 MAIN Unit. 48 BLOCK DIAGRAM. 49 , INC. SPECIFICATIONS General. 2 Transmitter .

5、2 Receiver. 2 CIRCUIT DESCRIPTION 1) MAIN VHF Reception. 3 2) SUB VHF Reception . 3 3) MAIN UHF Reception. 4 4) SUB UHF Reception . 4 5) V/V (VHF-VHF) Dual Reception. 5 6) U/U (UHF-UHF) Dual Reception. 5 7) MAIN VHF Squelch Control . 5 8) SUB VHF Squelch Control. 5 9) MAIN UHF Squelch Control . 5 10

6、) SUB UHF Squelch Control. 5 11) Transmit Signal Path. 5 12) VHF Transmit Signal Path. 5 13) UHF Transmit Signal Path . 5 14) VHF TX APC Circuit. 5 15) UHF TX APC Circuit. 6 16) VHF PTT circuit. 6 17) UHF PTT circuit. 6 18) VHF 1 chip IC. 6 19) UHF 1 chip IC. 6 20) Power-on Circuit. 6 CPU I/O DATA 1

7、) R5F104FF (XA1724) FRONT CPU. 7 2) R5F104PJ (XA1697) MAIN CPU . 8-9 SEMICONDUCTOR DATA 1) NJM78L05UA (XA0098). 9 2) NJM7808FA (XA0102) . 9 3) TA75S01F (XA0348). 9 4) TC4W53FU (XA1106) . 10 5) NJM2904V (XA0573) . 10 6) NJM2902V (XA0596) . 10 7) S-80845ALMP (XA0620). 10 8) NJM78M05DL1A (XA0947). 10 9

8、) RA60H1317M1 (XA1108). 10 10) SN74LV4051A (XA1194).11 11) BU4052BCFV (XA1229).11 12) TAR5S33U (XA1277).11 13) BD1020HFV (XA1335).11 14) NJM2591V (XA1391) .11 15) R1EX24008A (XA1417) .11 16) BA5406 (XA1519) . 12 17) BK4811B (XA1625). 12 2 General DR-735 T / E Operating mode 16K0F3E (Normal mode) 8K5

9、0F3E (Narrow mode) Number of memory channels 1000ch(Common)+200ch(Individual)+100ch(Dual) Antenna impedance 50? Frequency stability 2.5ppm Power requirement 13.8V DC15% (11.7 to 15.8V) Ground method Negative ground Receive 0.6A(Max.) 0.4A(Squelched) Transmit 12.0A Operating temperature -10C to 60C (

10、+14F to +140F) 140 (w) x Front:60 Body:40 (h) x 188 (d) mm (5.51(w) x Front:2.36 Body:1.57(h) x 7.40(d) Weight Approx. 1.3kg ( 2.87pounds) Transmitter Power output High:50W Mid:20W Low:5W Modulation system Variable reactance frequency modulation Maximum frequency deviation 5kHz (Wide mode) 2.5kHz (N

11、arrow mode) Spurious emissions -60 dB Adjacent channel power -60 dB Noise and hum ratio -40dB (Wide mode) -34dB (Narrow mode) Receiver Sensitivity -16dBu for 12dB SINAD Receiver circuitry Double conversion super heterodyne Intermediate Left side 1st 21.7MHz 2nd 450kHz frequency Right side 1st 30.85M

12、Hz 2nd 455kHz Squelch sensitivity -18dBu Selectivity (-6dB/-60dB) 12kHz/24kHz Inter modulation rejection ratio 60dB Spurious and image rejection ratio 70dB ? ? Current drain Dimensions DR-735T DR-735E ? 144.000 - 147.995MHz 144.000 - 145.995MHz 430.000 - 449.995MHz 430.000 - 439.995MHz 108.000 - 135

13、.995MHz 108.000 - 135.995MHz Receiver Frequency coverage 136.000 - 173.995MHz 136.000 - 173.995MHz 400.000 - 479.995MHz 400.000 - 479.995MHz Transmit Frequency coverage SPECIFICATIONS 3 CIRCUIT DESCRIPTION 1) MAIN VHF Reception ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 2) SUB VHF Reception ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 3) MAIN UHF Reception ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 4) SUB UHF Reception ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?