Alinco_DR-735_E_T_TA_serv.pdf

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 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 Specification. 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 Specification . 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 . 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) 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) 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) 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) 8K50F3E (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 (+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 (Narrow 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 30.85MHz 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 - 135.995MHz 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 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?