Yaesu IC-735 Сервис мануал онлайн [17/149] 209392

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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With the exception of AM and FM the various frequencies 10 BFO CIRCUIT As this unit is designed for all mode transmitting and can be adjusted separately by trimmers allowing for free receiving not only SSB and CW carriers but AM and FM adjustment transmit carriers are also generated The CW keying circuit receive tone also provides BFO functions and thus the space wave is The emitter voltage of the oscillation transistor is controlled negligible The oscillation frequencies for the various modes to are shown below perform keying for CW transmitting stop of CW oscillation receiving during SSB AM and transmitting FM Mode Frequency Name of crystal Condition USB 9 0130MHz CR49 LSB 9 0100MHz CR48 CW receiving 9 0098MHz CR48 CW transmitting 9 0106MHz CR48 Oscillation stops when key is released AM 9 0115MHz CR49 No oscillation during reception FM 9 0115MHz CR49 No oscillation during reception and reception the and to 11 SSB AND CW DETECTION CIRCUIT 14 AGC CIRCUIT The BFO signal created by IC8 is amplified by Q44 and The output of Q47 is AM and FM detected as well as being passes into the ring detection circuit formed by D88 89 and passed 90 This converts CW and SSB signals to audible signals which was constant voltage rectified by D96 and D97 is DC AF The detected analog signals are passed into the analog amplified by Q48 into the AGC detection circuit The AGC voltage switch transmitting gate IC13 The attack of the time constant for fast AGC is determined by C267 and R207 and the delay is determined by R211 12 FM DETECTION CIRCUIT emitter C268 and R212 are added for slow AGC When there is RF follower it is limited by IC9 to remove AM components X5 is FM gain control the voltage of the AGC line is reduced by approximately 0 5Vby passing it through D130 The signal its passes through R213 and D131 for FM in order to speed up After a the 455kHz ceramic IF signal discriminator demodulation circuit The passes which through forms demodulated an AF the untuned signal has the delay 455kHz components removed by L86 and C251 and it is fed into pin 8 of IC13 after de emphasis by R196 and C253 15 ALL MODE SQUELCH CIRCUIT 13 AM DETECTION CIRCUIT The squelch circuit uses the voltage of the S meter but also The output of the Q47 emitter follower passes into the AM includes operation as a noise squelch for FM detection circuit through C260 Forward bias is applied by the diode detection circuit of D94 and D95 to In the SSB CW and AM modes the voltage of the S meter is eliminate of passed into diodes at low input levels The distortion rate is typically kept squelch variable at approximately 1 5 by choosing the optimum time constant for CR after detection The AF signal feeds into pin which is connected to the output of pin 7 This opens and 4 of IC13 after the extremely low band signals less than switches detection output for the various modes and sets 200Hz are reduced by C263 the switching voltage of all modes to the low level for distortion caused by the leading edge characteristics closes IC12 IC13 Squelch circuit the compared resistor analog and to the Q54 switch voltage is IC controlled This FM 8V AM 8V SSB CW DET AF amplifier SSB CW 8V Analog switches IC13 AM DET R8V FM noise voltage FM DET C12 Side tone S meter voltage 054 Q52 SQUELCH CONTROL Fig 3 5 3 level of by analog the Q52 switch