Page 2 - Front unit; MODEL; Europe
INTRODUCTION DANGER ORDERING PARTS REPAIR NOTES This service manual describes the latest service informationfor the IC-F50/IC-F51 VHF TRANSCEIVER at the time of publication. NEVER connect the transceiver to an AC outlet or to a DC power supply that uses more than 8 V. Such a connectioncould cause a ...
Page 3 - TABLE OF CONTENTS
TABLE OF CONTENTS SECTION 1 SPECIFICATIONS SECTION 2 INSIDE VIEWS SECTION 3 DISASSEMBLY INSTRUCTIONS SECTION 4 CIRCUIT DESCRIPITON 4-1 RECEIVER CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 4-2 TRANSMITER CIRCUITS . . . . . . ....
Page 4 - GENERAL
1 - 1 SECTION 1 SPECIFICATIONS ‘ ‘ GENERAL • Frequency coverage : 136.000–174.000 MHz • Mode : FM • Type of emission : • Number of conventional channels : 128 ch, 8banks • Antenna connector : SMA type (50 Ω ) • Operating temperature range : –30 ˚C to +60˚C (–22 ˚F to +140˚F) [USA], [GEN] –25 ˚C to +...
Page 5 - MAIN UNIT; VCO circuit; TOP VIEW
SECTION 2 INSIDE VIEWS • MAIN UNIT 2 - 1 • FRONT UNIT APC amplifier(IC2: TA75S01F) +5 Regurator(IC9: NJM2870) IF amplifier(Q4: 2SC4215) IF IC(IC1: TA31136FN) Antenna switching circuit(D2,D5: 1SV307) Analog switch(IC13: BU4066BCFV)Baseband IC(IC10: AK2346) Expander IC(IC12: BU4094BCFV) D/A converter(...
Page 6 - C D; REMOVING THE CHASSIS UNIT
SECTION 3 DISASSEMBLY INSTRUCTIONS 3 - 1 Chassis unit B C D F G E H A E F Shield cover L L K I I K J J Main unit Chassis unit N N Front unit M O • REMOVING THE CHASSIS UNIT 1 Unscrew 1 nut A , and remove 1 knob B . 2 Remove 1 washer c , and unscrew 1 screw D . 3 Unscrew 2 screws E , and remove 2 was...
Page 7 - -1 RECEIVER CIRCUITS; type antenna; • 2ND IF AND DEMODULATOR CIRCUITS
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 filterwhile receiving and a resonator circuit while transmitting.This circuit does not allow transmit signals to enter thereceiver circuits. Rec...
Page 8 - -2 TRANSMITTER CIRCUITS; • AF AMPLIFIER
4 - 2 4-1-5 AF AMPLIFIER CIRCUIT (MAIN AND FRONT UNITS) The AF amplifier circuit amplifies the demodulated AF sig-nals to drive a speaker. This transceiver employs the baseband IC which is composed of pre-amplifier, expander,scrambler, MSK de-modulator, etc. at the AF amplifier sec-tion. The AF sign...
Page 9 - and is increased when it is mismatched.; VCC; • APC CIRCUIT
4 - 3 4-2-2 MODULATION CIRCUIT (MAIN UNIT) The modulation circuit modulates the VCO oscillating signal(RF signal) using the microphone audio signals. The AF signals from the D/A converter (IC6, pin 3) changethe reactance of varactor diode (D18) to modulate the oscil-lated signal at the TX VCO circui...
Page 10 - DESCRIPTION; LINE; DESCRIPTION; -4 POWER SUPPLY CIRCUIT
4 - 4 4-3-2 VCO CIRCUIT (MAIN UNIT) The VCO circuit contains a separate RX VCO (Q14, D19,D20) and TX VCO (Q13, D16, D17). The oscillated signal isamplified at the buffer amplifiers (Q10, Q12) and is thenapplied to the T/R switch (D14, D15). Then the receive 1stLO (Rx) signal is applied to the 1st mi...
Page 14 - SECTION 5 ADJUSTMENT PROCEDURES; REQUIRED TEST EQUIPMENT; EQUIPMENT
5 - 1 SECTION 5 ADJUSTMENT PROCEDURES 5-1 PREPARATION When adjusting IC-F60/F61, the optional CS-F50 ADJ ADJUSTMENT SOFTWARE (Rev. 1.0 or later), *OPC-966 JIG CABLE (modified OPC-966 CLONING CABLE ) are required. ■ REQUIRED TEST EQUIPMENT ■ SYSTEM REQUIREMENTS • Microsoft ® Windows ® 95 or Windows ®...
Page 15 - • SCREEN DISPLAY EXAMPLE; ADJUSTMENT FREQUENCY LIST
5 - 2 CS-F50 ADJ Rev.1.0 File COM 1: OPEN Option Connect Reload (F5) Disp para [A / D]VIN : 203 : CBh : 7.96 V TEMPS : 190 : BEh : 32.23 'CLVIN : 110 : 6Eh : 2.16 V SD : 31 : 1Fh : 0.61 V S MTR : Power (Hi) : 155 [ # # # # # # # # # # # # ] Power (L2) : 82 [ # # # # # # ] Power (L1) : 51 [ # # # # ]...
Page 19 - SECTION 6; REF
[FRONT UNIT] [VR BOARD] R601 7210003130 VARIABLE TP76N97N-13F-10KA-2497 T W601 8900012340 CABLE OPC-1260 T EP601 0910056532 PCB B 6034B D701 1790001810 S.VARISTOR AVR-M1005C080MTABB B D702 1790001810 S.VARISTOR AVR-M1005C080MTABB B D703 1790001810 S.VARISTOR AVR-M1005C080MTABB B D704 1790001810 S.VA...
Page 24 - Screw abbreviations; red
SECTION 7 MECHANICAL PARTS AND DISASSEMBLY 7 - 1 REF. NO. ORDER NO. DESCRIPTION QTY. MP701 8950005520 2403 9-pin connector 1 REF. NO. ORDER NO. DESCRIPTION QTY. R601 7210003130 TP76N97N-13F-10KA-2497 1 REF. NO. ORDER NO. DESCRIPTION QTY. DS401 5030002630 L3-0048TAY-2 1 EP402 8930061530 SRCN-2681-SP-...
Page 25 - UNIT abbreviation; FRONT Unit
7 - 2 UNIT abbreviation (C): CHASSIS PARTS, (M): MAIN UNIT, (CO): CONNECTOR UNIT, (V): VR UNIT, (A): ACCESSORIES, (F): FRONT UNIT MP15(C) MP11(C) MP415(F) MP414(F) MP413(F) MP3(A) MP2(A) MP15(C) MP404(F) MP11(C) MP411(F) MP412(F) MP701(CO) MP418(F) MP417(F) MP423(F) MP426(F) W401(F) MP12(C) MP12(C) ...
Page 26 - • DIODES
SECTION 8 SEMI-CONDUCTOR INFORMATION 8 - 1 • DIODES • TRANSISTOR AND FET’S 2SA1577 Q (Symbol: HP) 2SC5107 O (Symbol: MFO) DTA144 EU (Symbol: 16) XP1214 (Symbol: 9H) RD01MUS1 (Symbol: K2) RD07MVS1 (Symbol: RD07MVS1) XP4111 (Symbol: 9U) XP4312 (Symbol: 7T) RSR025N03 (Symbol: QY) XP6501 AB (Symbol: 5N)...
Page 28 - BOTTOM VIEW
• BOTTOM VIEW C274 C248 C289 R144 R145 C158 C159 C287 R191 C157 EP6 C140 C209 R97 R93 EP3 C260 C269 C267 R130 R132 R116 R115 C162 C166 C164 C288 R190 R108 C156 R94 C155 C151 R164 C232 R98 R161 R169 C231 C97 R165 C292 C96 R62 C90 C95 R63 C99 R68 C15 C308 D2 L3 D1 C8 L16 Q23 C233 Q25 MP1 Q24 C238 C5 C...
Page 33 - BLOCK DIAGRAM; FRONT UNIT; IF IC; CPU
SECTION 10 BLOCK DIAGRAM 10 - 1 136–174MHz LPF TMUT BATTERY_1 BT1 1 F1 VCC 2 Q26: TCP6103 Q403: 2SC4116Q404: RSR025N03Q405: RSR025N03W406: DTC144EU Q401: 2SB1132Q402: XP6501 IC406: TC7W66FK D401: MA2S111D402: MA2S111 Q407: DTA144EUQ409: XP4111 DS402_403SML–310MT AMP IC407: NJM12904 LPF IC403: NJM129...
Page 34 - VOLTAGE DIAGRAM
SECTION 11 VOLTAGE DIAGRAM 11 - 1 11-1 MAIN UNIT C211 4.7 R104 220 k R105 330 k R94 150 k C151 0.1 C200 47 P C199 0.001 C201 1 C202 0.1 R116 680 k R115 1.2 k L35 0.22 H C185 0.1 C167 0.1 R40 1.5 k C67 0.001 C75 10 R38 100 k R36 1.5 k R48 680 R34 100 k C60 0.01 R35 100 C59 0.001 C57 0.001 C52 12 P C5...
