Yaesu IC-735 [19/149] I i i i i i i i

Содержание

• General coverage receiver 1
• Hf all band transceiver 1
• Ic 735 1
• Service manual 1
• Foreword 2
• Table of contents 3
• 1 general 5
• 2 transmitter 5
• 3 receiver 5
• Section 1 specifications 5
• Specifications 5
• 1 installation recommendations 6
• 2 antenna 6
• 3 microphone 6
• 4 cw key 6
• Installation connections 6
• Section 2 installation and connections 6
• 5 powersupply 7
• 6 ground 7
• 1 linear amplifier 8
• 2 antenna tuner 8
• Section 3 system interconnections 8
• System interconnections 8
• 3 rtty terminal unit 9
• 4 sstv unit 10
• 5 transverter unit 10
• 6 receive antenna 10
• 7 rear panel connections 11
• 8 accessory socket 12
• Connections 12
• 1 ic ex243 electronic keyer unit 13
• 2 fl 32 fl 63 cw narrow filters 13
• Option installations 13
• Section 4 option installations 13
• 3 ut 30 tone encoder unit 14
• Circuit description 15
• Section 5 circuit description 15
• I i i i i i i i 19
• I i i i i i________ i jl 19
• Sensor and mic up down circuit 26
• C d q q 27
• I i i 0 o i latch 27
• O o o i i o i i 27
• Frequency range mhz 28
• Inj w1x 28
• Pd2834c 28
• Pd7225g 28
• Mm3 hasiii 29
• Ao ÿi fl 38
• Voltage circuit diagrams 38
• Иф1фгф 39
• 2 main unit 40
• Nod л sioiexs 42
• P p q p p p pp i 42
• Snos on 42
• 4 pa unit power amplifier 44
• 5 pa unit filter 45
• O o o o o o 45
• 1 preparation before servicing 47
• Maintenance adjustment 47
• Section 7 maintenance and adjustment 47
• 2 general adjustment 48
• Main unit 49
• Pll unit 51
• Pll unit 53
• Pa unit 56
• Transmitter adjustment 57
• Main unit 58
• Rear panel 59
• Transmitter adjustment 59
• Main unit 60
• 5 receiver adjustment 61
• Main unit 62
• 6 adjustment locations 63
• 7 lithium battery replacement 65
• 8 fuse replacement 65
• Section 8 troubleshooting 66
• Troubleshooting 66
• Inside views 68
• Sections insideviews 68
• Pll unit 69
• 3 pa unit power amplifier and filter 70
• 1 front panel disassembly 72
• Disassembly assembly diagrams 72
• Section 10 disassembly and assembly diagrams 72
• Front sub chassis connector assembly 75
• 4 main unit connector assembly 76
• 5 pl unit connector assembly 77
• 6 pa unit connector assembly 78
• Board layouts 79
• Front unit 79
• Sinoavl 0uv08 и noi1o3s 79
• Una inohd l kk 79
• 2 main unit 80
• 60 tts s 80
• C 62 g7 5 80
• Main unit 80
• O vi lw 80
• _ v rs 80
• 3 pll unit 82
• Pll unit 82
• Libero 83
• O j co 83
• Pa unit power amplifier 84
• Pa unit filter 85
• Ds2 o cd d51 u 86
• Sensor unit 86
• Block diagram 87
• Ic ratings 88
• Azpd7225g lcd controller driver 89
• Jpd4066bc 89
• Nd487c1 3r 90
• Azpc1037h double balanced modulator 91
• Mpc577h fm if amplifier 91
• Njm072082d 92
• Njm4558d dual low noise amp 92
• О u u u и 92
• Hd10551 pre scaler for digital tuning system 93
• Mpc1181h audio power amplifier 93
• M5218l dual audio amplifier 94
• Za78m08 94
• Ba222 monolithic timer 95
• Jpd4001bc 95
• H h h h 2 u h h 2 96
• Hd63a01v1 96
• Pd4069ubc 96
• A pd4021bc 97
• Maximum ratings 97
• Pin connection 97
• _zpd4510bc 97
• Üjldlijlljléjléjujlsj 97
• Dan401 high speed switching diode array 98
• Jpd82c43c 98
• 1pd2834c pll frequency synthesizer 99
• Mpb555c 99
• Uj lj l1j 111 lj l j izj id lu 99
• N n n n_n n_n 100
• Sn76514 circuit type balanced mixer 100
• U u u u u im 100
• Ua78m05c 100
• A pc1037h double balanced modulator 101
• Sn4ls90n decode counter 101
• At 15o 102
• Fl 32 cw narrow filter 500hz 6db 102
• Fl 63 cw narrow filter 250hz 6db 102
• Ic 2kl 102
• Ic at5oo 102
• Ic ex243 102
• Ic hp1 102
• Ic mb5 mobile mounting bracket 102
• Ic ps3o 102
• Ic sm6 desk microphone 102
• Ic sp3 external speaker 102
• Matching style and size with ic 735 102
• Optional units 102
• Section 14 optional units 102
• Sp 7 external speaker with matching style and size 102
• Ef unit front unit 103
• Parts list 103
• Section 15 parts list 103
• Front unit front unit 104
• Front unit main unit 105
• Main unit 105
• Main unit main unit 106
• Main unit main unit 107
• Main unit main unit 108
• Main unit main unit 109
• Main unit main unit 110
• Main unit main unit 111
• Main unit main unit 112
• Main unit main unit 113
• Main unit main unit 114
• Pl unit 114
• Pl unit pl unit 115
• Pl unit pl unit 116
• Pl unit pl unit 117
• Pl unit pl unit 118
• Pl unit pl unit 119
• Pl unit pl unit 120
• Pl unit pl unit 121
• Pa unit power amplifier 122
• Pl unit pa unit power amplifier 122
• Pa unit power amplifier pa unit power amplifier 123
• Unit filter 123
• Pa unit filter pa unit filter 124
• Pa unit filter 125
• Sensor unit 125
• 1 features 126
• 2 theory of operation 126
• Ci v communications interface system 126
• Foreword 126
• Section 16 icom cl v communication interface system 126
• 3 control code 128
• 4 collision detection 131
• 5 operation with the ic 735 131
• Code description 131
• 0 9600 132
• 1 if the transceive matrix is on and the displayed 132
• Changing the memo ch the ic 735 sends out the following data automatically 132
• During transceive operation db3 must be on the ic 735 comes factory preset for 1200 baud and the network address is 4 also available are 300 and 9600 baud each receiver connected to the icom cl v system requires its own unique address in the same way that individual houses have different addresses 132
• Example the example frequency is 14 23 5mhz 132
• Factory setting and standard cl v baud rate 132
• Frequency is changed by using the main dial the microphone up down function vfo a b or by 132
• I______________i 132
• T ransceive 132
• The baud rate can be selected by using db4 and db5 refer to the chart at left 132
• The ic 735 has the capability to handle the x 10mhz digit 132
• Through the x 10hz digit the display shows all digits except 10hz the 1hz digit is dummy data 132
• X 10hz x 10mhz 132
• I__________________ i 133
• I__________________ i 135
• I____________ i 136
• X10hz x 10mhz 136
• Schematic diagram 142
• A 0650a 146
• Jilcoml icom incorporated 146

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for deflection of the ALC meter Q56 is a buffer amplifier for external control of this unit s ALC It prevents fluctuations in the attack time due to varying ALC line impedances The protection circuit uses the collector current of the final transmit stage and operates in the following manner After the lc and lc voltages fed into J2 are split with resistors the voltage is DC amplified by IC15 The variable resistor R262 at the cathode of D110 is adjusted so that Q74 comes ON when the lc is approximately 20A If the adjustment value is exceeded the transmit output is quickly limited to prevent an increase in the current and to protect the final stage When the REF voltage rises it passes through D106 and turns on Q74 in the same manner as lc APC in order to prevent the REF voltage from exceeding a certain level 24 POWER SUPPLY CIRCUIT Signals T8 and R8 are fed out at the proper timing in order to allow the power section of this unit to operate with full break in Q63 removes chattering from the SEND line The relay for external unit standby is switched ON and OFF with the same timing as antenna switching The timing of each voltage line is shown below 25 OTHERS When transverter voltage is applied from ACC PAT8 is stopped by Q2 03 Q4 and 073 for low level input and output at J13 Timing diagram of CW operation 0 100 50 150mS IIIIIIII I I I I I I________ I JL Key Q61 collector SEND T8 R8 Transmission waves BDliB Q14 E squelch Speaker output Sound of Side tone Sound of Side tone received received signals signals Fig 4 Side tone and key are synchronous leading edge of side The timing of the various circuits in the break in mode is tone and the leading and trailing edges have a sloping of shown above approximately 3 5ms 5 5