Summary of IC-400PRO
Page 1
Uhf transceiver i400pro service manual.
Page 2
Introduction this service manual describes the latest service information for the ic-400pro uhf transceiver at the time of publi- cation. Danger never connect the transceiver to an ac outlet or to a dc power supply that uses more than 16 v. This will ruin the transceiver. Do not expose the transceiv...
Page 3
Table of contents section 1 specifications section 2 inside view section 3 disassembly instructions section 4 circuit description 4 - 1 receiver circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 - 1 4 - 2 transmitter cir...
Page 4: Section 1
1 - 1 section 1 specifications ‘ ‘ general • frequency range : 476.425 mhz–477.400 mhz [cb] 450 mhz–500 mhz [private] • number of conventional channels : 40 channels (include in 1 bank) [cb] 88 channels (include in 2–8 bank) [private] • type of emission : wide (16k0f3e) (25 khz; [cb]) wide (16k0f3e)...
Page 5: Section 2
2 - 1 section 2 inside view antenna switch/ low-pass filter circuit 1st mixer* (q3: 3sk299) 2nd if filter* (fi2: alfym450f=k) d/a converter* (ic6: m62363fp-650c) if ic (ic1: ta31136fn) 1st if filter (fi1: fl-335) * located under side of the point. Final fet module (ic3 : ra30h4452m-21) cpu 5v regula...
Page 6: Section 3
3 - 1 section 3 disassembly instructions • opening case and removing the front unit q unscrew 4 screws a , and remove the bottom cover. W disconnect the flat cable b from j2. E disconnect the cable c from j7. R unscrew 2 screws d , and remove the front unit. B c d a j2 j7 y unscrew 8 screws f . U re...
Page 7: Section 4
4 - 1 section 4 circuit description 4-1 receiver circuits 4-1-1 antenna switching circuit (main unit) the antenna switching circuit functions as a low-pass filter while receiving and as resonator circuit while transmitting. This circuit does not allow transmit signals to enter the receiver circuits....
Page 8
4 - 2 4-1-5 af amplifier circuit (main unit) the af amplifier circuit amplifies the demodulated af sig- nals to drive a speaker. The af signals from the fm if ic (ic1, pin 9) are applied to the active filter circuit (ic16). The active filter circuit (high- pass filter) removes ctcss or dtcs signals....
Page 9
4 - 3 4-2-4 power amplifier circuit (main unit) the power amplifier circuit amplifies the driver signal to an output power level. The rf signal from the drive amplifier (q8) is passed through the low-pass filter circuit (l18, l43, c89, c90, c92, c380, c381, c510) and applied to the power module (ic3...
Page 10
4 - 4 description the voltage from a dc power supply. The same voltage as the hv line which is con- trolled by the power switching circuit (q23, q24). The cpu outputs the “pwon” control signal to the power switching circuit to turn the circuit on when the [power] switch is pushed. Common 5 v for the...
Page 11
4 - 5 outputs dimmer control signal. High: dimmer is on. Outputs backlight control signal. High: backlight is on. Output lcd segment signals. Output lcd common signals. I/o ports for the optional board control signals. Input port for the clock signal from the optional board via j1. Input port for th...
Page 12: Section 5
5 - 1 section 5 adjustment procedures + audio generator 300 hz to 3 khz ac millivoltmeter mice mic ptt ptt switch ptte add a jumper wire here electrolytic capacitor 47 f opc-1122 (cloning cable) 5-1 preparation when you adjust the contents on pages 5-5 and 5-6, soft- ware adjustment, the optional cs...
Page 13
5 - 2 personal computer to the mic connector to an rs-232c port db9 female plug rs-232c cable (straight) *opc-1122 (jig cable) ac millivoltmeter audio generator fm deviation meter (dc measurable) attenuator 40 db or 50 db to the antenna connector to dc cable standard signal generator 127 to 17 dbm (...
Page 14
5 - 3 cs-400pro adj rev.1.0 file com 1: open option connect reload (f5) disp para [a / d] vin : 178 : b2h : 19.96 v temps : 177 : b1h : 26.44 ’c lvin : 176 : b0h : 3.45 v sd : 23 : 17h : 0.45 v power (hi) : 198 [ # # # # # # # # # # # # # # # # # ] power (l2) : 115 [ # # # # # # # # # ] power (l1) :...
Page 15
5 - 4 lv pll lock voltage check point c134 pll lock voltage adjustment for tx c133 pll lock voltage adjustment for rx dc power supply 13.8 v / 10 a 5-2 pll adjustment pll lock voltage 1 2 3 4 • operating freq. : 450.000 mhz • receiving • output power : low1 • transmitting • operating freq. : 500.000...
Page 16
5 - 5 5-3 software adjustment select an operation using [ ↑ ] / [ ↓ ] keys, then set specified value using [ ← ] / [ → ] keys on the connected computer keyboard. 1 1 2 3 1 2 1 2 1 • operating freq. : 500.000 mhz • output power : low1 • connect the rf power meter or 50 Ω dummy load to the antenna con...
Page 17
5 - 6 *the output level of the standard signal generator (ssg) is indicated as the ssg’s open circuit. Software adjustment – continued select an operation using [ ↑ ] / [ ↓ ] keys, then set specified value using [ ← ] / [ → ] keys on the connected computer keyboard. Minimum distortion level set “sql...
Page 18
5 - 7 r59 beep volume adjustment 5-4 trimmer adjustment • make this adjustment if necessary (for example, when beep sound is too loud or too soft). • be careful!: 5-tone calling beep sound becomes loud or soft when beep volume adjusts to loud or soft. Beep volume 1 • operating freq. : any • receivin...
Page 19: Section 6
[front unit] [front unit] ic1 1140011470 s.Ic hd6433687a37fp (fx-2622b) b ic2 1110005770 s.Ic s-80942cnmc-g9c-t2 b ic3 1140008650 s.Ic hn58x2464ti b ic5 1110005340 s.Ic njm12902v-te1 b ic6 1130009090 s.Ic lc75834w-tlm b q1 1530002850 s.Transistor 2sc4116-bl (te85r) b q2 1590001050 s.Transistor dtc11...
Page 20
[front unit] ds4 5040002310 s.Led sml-311ytt86 t ds5 5040002310 s.Led sml-311ytt86 t ds6 5040002310 s.Led sml-311ytt86 t ds7 5040002310 s.Led sml-311ytt86 t ds8 5040002310 s.Led sml-311ytt86 t ds9 5040002310 s.Led sml-311ytt86 t ds11 5030002510 lcd l2-0607tay t sp1 2510001220 speaker c052sb500-13 w1...
Page 21
[main unit] r28 7030003440 s.Resistor erj3geyj 102 v (1 k Ω ) t r29 7030003340 s.Resistor erj3geyj 151 v (150 Ω ) b r30 7030003440 s.Resistor erj3geyj 102 v (1 k Ω ) b r31 7030003320 s.Resistor erj3geyj 101 v (100 Ω ) b r32 7030004050 s.Resistor erj3geyj 1r0 v (1 Ω ) t r33 7030003380 s.Resistor erj3...
Page 22
[main unit] r267 7030003610 s.Resistor erj3geyj 273 v (27 k Ω ) t r268 7030003560 s.Resistor erj3geyj 103 v (10 k Ω ) t r269 7030003680 s.Resistor erj3geyj 104 v (100 k Ω ) b r270 7030003680 s.Resistor erj3geyj 104 v (100 k Ω ) b r271 7030003320 s.Resistor erj3geyj 101 v (100 Ω ) t r285 7030003320 s...
Page 23
[main unit] c164 4030006860 s.Ceramic c1608 jb 1h 102k-t t c167 4030011600 s.Ceramic c1608 jb 1e 104k-t b c168 4030008920 s.Ceramic c1608 jb 1h 473k-t b c169 4030008920 s.Ceramic c1608 jb 1h 473k-t b c170 4030006860 s.Ceramic c1608 jb 1h 102k-t t c172 4030009630 s.Ceramic c1608 jb 1h 822k-t t c173 4...
Page 24: Section 7
Section 7 mechanical parts and disassembly 7 - 1 mc1 mp1 + mp2 mp9 mp10 w2 w1 mp3 mp4 mp5 mp6 mp7 mp8 ic om lcd-sticker j1 6510004880 connector mr-ds-e 01 1 mp1 8010019060 2601 chassis 1 mp2 8110007820 2601 cover 1 mp3 8210019340 2622 front panel 1 mp4 8930060840 2622 keyboard (a) 1 mp5 8930059090 2...
Page 25
Mp15 (c) mp16 (c) ds11 (f) mp5 (c) unit abbreviations (f): front unit (m): main unit (c): chassis parts ep2 (f) mp6 (c) mp7 (c) mp3 (c) sp1 (f) mp17 (c) mp11 (c) mp7 (m) mp1 (c) j1 (c) mp10 (c) mp2 (c) mp14 (c) r14 (f) j1 (f) mp13 (m) j4 (m) w2 (m) mp8 (m) mp2 (m) mp6 (m) mp3 (m) mp9 (c) mp13 (c) mp...
Page 26
Section 8 semi-conductor information • transsistors and fet’s • diodes b e c b e c b e c b e c b e c b c e g g d d s s s d g g s d d s g2 g1 b e c b e c b e c e1 b1 b2 c1 c2 e1 e2 b2 c1 b1 c2 2sa1577 t106 q 2sc3356 t1b r25 2sc4213 b 2sc4215 o 2sc4226 t1 r25 2sc5107 o 2sd1664 t100q 2sj144 gr 2sj377 2...
Page 27
Section 9 board layouts 9-1 front unit • top view 8v 1 to microphone 7 2 8 j1 afo mice gnd clo ptt mic cli 9 - 1.
Page 28
J3 14 2 13 1 j3 gnd gnd pw on opt1 p87 p86 cpu5v gnd gnd gnd nmi res opt2 nc 1 16 1 48 24 13 12 36 37 25 1 7 14 8 17 32 33 48 49 8 5 1 4 64 1 39 2 to main unit j2 40 j2 dim d ast opt3 opt2 opt1 ptt o ptti rem sck si so cirq ccs mic eptt nc beep pw on 8v gnd gnd to n e tenc nois exoe exst unlk plst c...
Page 29
Ant chassis j1 to dc cable w2 1 4 8 5 1 8 16 9 1 8 16 9 1 to optional unit 15 30 16 j1 gnd 5v vcc mmute afono beepo rmute det disc rem ccs cirq so si sck ptti ptt o mco t mcin nc bu s y nc sigo opt1 opt2 opt3 gnd d ast o v12 o v12 dim 40 2 39 to front unit j2 1 j2 d ast opt3 opt2 opt1 ptt o ptti rem...
Page 30
Sp 14 8 1 1 7 14 8 7 16 9 1 8 12 24 1 13 9 - 4 • bottom view (main unit).
Page 31
Section 10 block diagram voltage line tx line rx line common line disc mic afo beep 8v mcot mcin beepo rssi 1st mixer 8v csft 19.6608 mhz beep nois dim cdec sdec eptt lvin rssi f d e det disc j6 main unit front unit j1 ctcss/dtcs dec 5/2 tone dec j1 beep0 353.65 mhz-443.65 mhz 46.35 mhz 450 khz sqin...
Page 32
Section 11 voltage diagrams 11-1 front unit voltage line explanatory notes rx line tx line j2 dim dast opt3 opt2 opt1 ptto ptti rem sck si so cirq ccs mic eptt nc nc nc beep pwon 8v gnd gnd tone tenc nois exoe exst unlk plst cdec sdec ov12 rssi lvin temp batv 5v cpu5 afo to main unit j2 ic1 hd64f368...
Page 33
11-2 main unit voltage line explanatory notes tx line rx line common line r77 8v 10k j1 sck si so cirq ccs gnd gnd disc det beepo afono ov12 ov12 dast opt3 opt2 opt1 sigo busy r266 47k r267 27k r268 10k r265 18k 8v cpu5v 5v r270 100k r264 68k r269 100k r263 1m r262 1m r261 1m r271 100 mic cp24 5v cp...
Page 34
Voltage line explanatory notes tx line rx line common line r65 220 c101 0.001 l20 27n r66 100k main unit (1) bus line2 c110 470p l41 27n r75 150k c105 0.001 q12 2sc5107 r8v c104 0.001 r74 100k r72 470 r76 220 r73 100 c109 0.001 c102 12p r71 33 q11 2sc5107 c301 470p r234 47k l21 22n q10 2sc5107 c100 ...
Page 36
1-1-32, kamiminami, hirano-ku, osaka 547-0003, japan s-14003hz-p2 c 2003 icom inc..