Page 2 - DO NOT expose the transceiver to rain, snow or any liquids.; using such test equipment.
6-9-16, Kamihigashi, Hirano-ku, Osaka 547-0002, JapanPhone : 06 6793 5302Fax : 06 6793 0013 Communication EquipmentHimmelgeister Str. 100, D-40225 Düsseldorf, GermanyPhone : 0211 346047 Fax : 0211 333639 URL : http://www.icomeurope.com Unit 9, Sea St., Herne Bay, Kent, CT6 8LD, U.K.Phone : 01227 741...
Page 3 - TABLE OF CONTENTS
TABLE OF CONTENTS SECTION 1 SPECIFICATIONS SECTION 2 INSIDE VIEWS SECTION 3 DISASSEMBLY AND OPTION INSTRUCTIONS 3-1 DISASSEMBLY INSTRUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 - 1 3-2 OPTIONAL UNIT INSTALLATIONS . . . . . . . . . . . . . . . ....
Page 4 - GENERAL
1 - 1 SECTION 1 SPECIFICATIONS ‘ ‘ GENERAL • Frequency coverage : 136.000–150.000 MHz • Type of emission : 16K0F3E (W-type), 8K50F3E (N-type) • Number of channels : 32 ch (16 channels × 2 banks: 2-BANK version), 16 ch (16 channel version) • Power supply requirement : 7.2 V DC (negative ground; suppl...
Page 5 - • MAIN UNIT
2 - 1 SECTION 2 INSIDE VIEWS • MAIN UNIT Power amplifier(Q1: 2SK2974) Antenna swtching circuit(D1, D2, D8: MA77) TOP VIEW BOTTOM VIEW RF amplifier(Q12: 3SK293) VCO circuit 1st mixer(Q13: 3SK239A) Low-pass filter circuit TX/RX switch(D3, D4: MA77) Mic amplifier circuit APC IC3A: NJM2902V Q37: DTA144E...
Page 6 - -1 DISASSEMBLY INSTRUCTION; • REMOVING THE CHASSIS PANEL
3 - 1 SECTION 3 DISASSEMBLY AND OPTION INSTRUCTIONS 3-1 DISASSEMBLY INSTRUCTION • REMOVING THE CHASSIS PANEL 1 Unscrew 1 nut A , and remove 1 knob B . 2 Unscrew 2 screws C . 3 Take off the chassis in the direction of the arrow. 4 Unplug J6 to separate front panel and chassis. • REMOVING THE MAIN UNI...
Page 7 - -2 OPTIONAL UNIT INSTALLATIONS; Remove the option cover.
3 - 2 3-2 OPTIONAL UNIT INSTALLATIONS 1 Remove the option cover. 2 Remove the bottom protective paper of spoge. 3 Connect one of UT-96, UT-105, UT-109, UT-110, UT-111, and UT-108 optional unit J5. 4 Replace the option cover to the chassis-hole. SPONGEParts name : 1556 spongeOrder No. : 8930013545 Op...
Page 8 - -1 RECEIVER CIRCUITS; type diode switching system.; • 2nd IF and demodulator circuits
4 - 1 SECTION 4 CIRCUIT DESCRIPTION 4-1 RECEIVER CIRCUITS 4-1-1 ANTENNA SWITCHING CIRCUIT Received signals are passed through the low-pass filter (L1,L2, C1–C5, C8). The filtered signals are applied to the λ ⁄ 4 type antenna switching circuit (D2, D8). The antenna switching circuit functions as a lo...
Page 9 - -2 TRANSMITTER CIRCUITS; • APC circuit
4 - 2 4-1-5 AF CIRCUIT AF signals from the FM IF IC (IC2, pin 9) are applied to themute switch (IC4, pin 1) via the AF filter circuit (IC3b, pins 6,7). The output signals from pin 11 are applied to the AFpower amplifier (IC5, pin 4) after being passed through the[VOL] control (R143). The applied AF ...
Page 10 - -4 POWER SUPPLY CIRCUITS; VOLTAGE LINE; LINE; HV; DESCRIPTION; The voltage from the attached battery pack.
4 - 3 When the driving current is increased, input voltage of thedifferential amplifier (pin 2) will be increased. In such cases,the differential amplifier output voltage (pin 1) is decreasedto reduce the driving current. 4-3 PLL CIRCUIT A PLL circuit provides stable oscillation of the transmit fre-...
Page 12 - REQUIRED TEST EQUIPMENT; SECTION 5 ADJUSTMENT PROCEDURES; SYSTEM REQUIREMENTS
5-1 PREPARATION When you adjust the contents on page 5-5 or 5-6, SOFTWARE ADJUSTMENT, the optional CS-F3G ADJ ADJUSTMENT SOFTWARE (Rev. 1.0 or later), OPC-478 CLONING CABLE and a JIG CABLE (see illustration at page 5-2) are required. ■ REQUIRED TEST EQUIPMENT 5 - 1 SECTION 5 ADJUSTMENT PROCEDURES EQ...
Page 13 - • JIG CABLE; JIG cable; • ADJUSTMENT SOFTWARE'S SCREEN DISPLAY EXAMPLE
5 - 2 • JIG CABLE + ( CLONE) – ( GND) + ( SP) – ( SPE) 3-conductor 3.5(d) mm plug OPC-478 JIG cable to IC-F3GT/GS [SP] jack CS-F3G ADJ Rev.1.0 File COM 1: OPEN Option Connect Reload (F5) Disp para TCXO [A / D] VIN : : : 189 BDh 7 . 41V TEMPS : : : 186 BAh 30 . 35'C LVIN : : : 98 62h 1 . 92V CH No. :...
Page 14 - • CONNECTION; • DC POWER CABLE CONNECTIONS; Top view
5 - 3 to an RS-232C port Personalcomputer to [MIC] to [SP] JIG cable DB9 female plug (incl. level converter circuit) • CONNECTION to the antenna connector RF power meter 0.1–10 W/50 Ω Frequency counter Attenuator 40 dB or 50 dB FM deviation meter Standard signal generator 0.1 µ V to 32 mV (–127 dBm ...
Page 15 - • MAIN unit; RF power meter
5 - 4 5-2 PLL ADJUSTMENT PLL LOCKVOLTAGE 1 2 • Operating frequency: 146.000 MHz• Receiving • Transmitting MAIN Connect a digital multi meter to check pointLV. 2.0 V 1.5–2.5 V MAIN L11 Verify ADJUSTMENT ADJUSTMENT CONDITIONS UNIT LOCATION VALUE UNIT ADJUST MEASUREMENT ADJUSTMENT L11 PLL lock voltagea...
Page 16 - -3 SOFTWARE ADJUSTMENT
5 - 5 1 2 1 2 1 1 • Operating frequency: 146.000 MHz• High/Low switch : Low • Connect the RF power meter or 50 Ω dummy load to the antenna connector. • Transmitting • Transmitting • Operating frequency: 146.000 MHz• High/Low switch : Low • Transmitting • High/Low switch : High • Transmitting • Opera...
Page 17 - SOFTWARE ADJUSTMENT – continued
5 - 6 Minimum distortion level 12 dB SINAD At the point where the audio signals just appears. 1 • Operating frequency: 146.000 MHz • Connect a standard signal generator to the antenna connector and set as: Frequency : 146.000 MHz Level : 3.2 µV* (–97 dBm) Modulation : 1 kHz Deviation : ±3.5 kHz (W-t...
Page 18 - SECTION 6 PARTS LIST
6 - 1 S.=Surface mount IC1 1130007610 S.IC µPD3140GS-E1 (DS8) IC2 1110003490 S.IC TA31136FN (D,EL) IC3 1110003780 S.IC NJM2902V-TE1 IC4 1130008090 S.IC BU4066BCFV-E1 IC5 1110001810 S.IC TA7368F (TP1) IC6 1180001740 S.IC TK11250BMCL IC7 1130009680 S.IC HN58X2432TI IC8 1140003750 S.IC HD6473877H (Z-TA...
Page 22 - Screw abbreviations
SECTION 7 MECHANICAL PARTS AND DISASSEMBLY 7 - 1 REF. NO. ODER NO. DESCRIPTION QTY. MP1 8210016750 2251-T front panel [F3GT] 1 8210016740 2251-S front panel [F3GS] 1 MP2 8930050890 2251 terminal holder 1 MP3 8010017990 2251 chassis 1 MP4 8210016570 2251 rear panel 1 MP5 8930050870 2251 release butto...
Page 24 - TRANSISTOR AND FET’S
SECTION 8 SEMI-CONDUCTOR INFORMATION 8 - 1 2SC5085 Y(Symbol: MCY) 2SK2974(Symbol: K2974) 2SK1069 4(Symbol: FJ4) 2SC4116 GR(Symbol: LG) 2SA1577 Q(Symbol: HQ) 3SK239 A(Symbol: XR) 2SC4215 O(Symbol: QO) 2SK2973(Symbol: K1) DTC144 TU(Symbol: 06) DTC144 EU(Symbol: 26) UN911 H(Symbol: 6P) XP6501 AB(Symbol...
Page 25 - • TOP VIEW
SECTION 9 BOARD LAYOUTS 9 - 1 MAIN UNIT • TOP VIEW DS1 MC1 DS2 DS3 R204 R205 R155 R170 C215 R169 C233 C234 C295 R208 C211 R257 C286 C301 R175 R249 R151 R264 R186 R185 C293 R35 C55 C64 R89 C56 R90 R81 R80 R79 R84 R13 C26 C24 C25 R15 R12 R11 R10 C23 R14 R16 R177 C136 R114 R117 C137 R115 C217 C133 C134...
Page 26 - • BOTTOM VIEW
9 - 2 • BOTTOM VIEW C277 R252 C138 R258 R143 J2 J3 MP5 S1 S3 Q21 Q22 L25 X1 IC10 IC7 IC8 C198 IC12 Q33 R236 R238 R237 S2 C158 C155 FI2 C174 C173 C72 C298 C281 L4 L2 L1 L16 L17 L24 D29 L31 C287 C285 C8 C3 C18 C76 R96 R95 R75 L20 L19 C105 C106 C109 C104 R94 R70 R72 C97 C98 C94 L29 C99 C169 L21 C101 C1...
Page 27 - BlLOCK DIAGRAM
10 - 1 SECTION 10 BlLOCK DIAGRAM ANT LPF LPF ANT SW D1: MA77D2: MA77D8: MA77 Q1: 2SK2974 Q2: 2SK2973 Q3: 2SC5085 Y D3: MA77D4: MA77 PLL IC Q4: 2SC4215 O Q6: 2SC4215 O IC1: UPD3140GS VCOQ7: 2SC5085 YQ8: 2SC5085 Y REF X1: CR-664(15.3 MHz) OPTION UNIT J5 AXN330C038 2TONE or 5TONE PTT MIC AF REG AF AMP ...
Page 28 - VOLTAGE DIAGRAM
VCC R5 S5 MIC CPU5 VCC 5V T5 R5 S5 VOLIN VOLOUT AFOUT MIC SP VCC CPU5 5V T5 R5 S5 CPU5S5T5R5 CPU5 C2230.01 C2240.01 D R131470 Q17UN911H R130100 C1470.1 PTT C15410 C 8 9 10 IC3CNJM2902V C1330.1 C2090.1 R1771 k C1250.0022 C1240.01 C2170.1 R1763.9 k R9327 k R10910 k C134220 P R104100 k R26615 k R108150...
Page 29 - COMPLETE VIEW
VCC R1783.9 k C12915 R12068 k R1451 M R9912 k R1001.8 k D26DAN202K Q152SB1132 R R12610 k C1490.1 C1460.001 C14510 R1222.7 k 4 5 6 3 2 1 Q16XP6501 AB C1400.1 R1211 k C1390.1 NC 1 VCC 2 NC 3 VIN 4 RIPPLE 5 NF 6 PHASE 7 PREGND 8 PWGND 9 POUT 10 IC5TA7368F C1710.1 R1233.3 k R12810 C15010 R12733 C15147 P...
Page 31 - LEFT SIDE
VCC R5 S5 MIC CPU5 VCC 5V T5 R5 S5 VOLIN VOLOUT AFOUT MIC SP VCC CPU5 5V T5 R5 S5 CPU5S5T5R5 CPU5 C2230.01 C2240.01 D R131470 Q17UN911H R130100 C1470.1 PTT C15410 C 8 9 10 IC3CNJM2902V C1330.1 C2090.1 R1771 k C1250.0022 C1240.01 C2170.1 R1763.9 k R9327 k R10910 k C134220 P R104100 k R26615 k R108150...
Page 33 - VHF FM TRANSCEIVERS
SERVICE MANUAL 6-9-16, Kamihigashi, Hirano-ku, Osaka, 547-0002, Japan S-13605II-CD © 1999 Icom Inc. VHF FM TRANSCEIVERS
