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SERVICE
MANUAL
UHF FM TRANSCEIVER
LPD FM TRANSCEIVER
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INTRODUCTION This service manual describes the latest service information for the at the time of publication. MODEL VERSION SYMBOL BODY COLOR Italy ITA BLACK IC-4008MK ITA-1 YELLOW IC-4008A C.S.America CSA BLACK CSA-1 YELLOW To upgrade quality, all electrical or mechanical parts and internal circuits are subject to change without notice or oblig- ation. DANGER NEVER connect the transceiver to an AC outlet or to a DC power supply that uses more than 5 V. Such a connection could cause a fire hazar
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TABLE OF CONTENTS SECTION 1 SPECIFICATIONS SECTION 2 INSIDE VIEWS SECTION 3 DISASEMBLY INSTRUCTION SECTION 4 CIRCUIT DESCRIPTION 4-1 RECEIVER CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1 4-2 TRANSMITER CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2 4-3 PLL CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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SECTION 1 SPECIFICATIONS [ITA], [ITA-1] [CSA], [CSA-1] Number of channels 69 channel (simplex; 433.075–434.775) Type of emission 16K0F3E Frequency stability ±2500 Hz (±5.7 ppm) Frequency resolution 25 kHz Power supply requirements 3 · AA(R6) dry, alkaline;or optional BP-202 (negative ground) Current drain less than 140 mA less than 500 mA Operating temperature range –10˚C to +55˚C (–14˚F to +122˚F) Number of CTCSS frequency 38 (67.0–250.3 Hz) Dimensions 55.5(W) · 102.5(H) · 26.5(D) mm 3 1 1 (pro
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CHANNEL FREQUENCY LIST Channel No. Frequency (MHz) Channel No. Frequency (MHz) Channel No. Frequency (MHz) 1 433.0750 24 433.6500 47 434.2250 2 433.1000 25 433.6750 48 434.2500 3 433.1250 26 433.7000 49 434.2750 4 433.1500 27 433.7250 50 434.3000 5 433.1750 28 433.7500 51 434.3250 6 433.2000 29 433.7750 52 434.3500 7 433.2250 30 433.8000 53 434.3750 8 433.2500 31 433.8250 54 434.4000 9 433.2750 32 433.8500 55 434.4250 10 433.3000 33 433.8750 56 434.4500 11 433.3250 34 433.9000 57 434.4750 12 433
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SECTION 2 INSIDE VIEWS MAIN UNIT • TOP VEIW BOTTOM VEIW Audio amplifier (IC9: NJM2070M) EEPROM T+3 Regurator (IC3: X24C01AS) (Q28: 2SB798) +3 Regurator CPU (IC6: S-81230SG) (IC1: μPD753036GK) R+3 Regurator (Q18: 2SA1586) RF UNIT • TOP VIEW BOTTOM VIEW FM IF IC (IC2: TA31136FN) Reference oscilletor (X1: CR-633 21.25 MHz) 1st mixer 1st IF filter (Q2: 2SC4226) PLL IC (Fl2: FL-298) (IC1: TB31202FN) 1st IF amplifier VCO circuit (Q1: 2SC4215) RF amplifier 2nd IF filter (Q3: 2SC5194) (Fl3: CFWM450E) 2
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SECTION 3 DISASEMBLY INSTRUCTIONS REMOVING THE REAR PANEL REMOVING THE MAIN UNIT • • Unscrew 1 screw , and 4 screws . Unscrew 2 screws, . Remove the rear panel in the direction of the arrow. Remove the PTT rubber, . Unsolder 2 points, , and remove the MAIN unit. F G B B A H REMOVING THE RF UNIT • Remove 1 knob, , and unscrew 1 nut, . Unsolder 1 point, , and then remove the RF unit. RF unit E C MAIN unit D 3 - 1
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SECTION 4 CIRCUIT DESCRIPTION 4-1-4 2nd MIXER AND DEMODULATOR CIRCUITS 4-1 RECEIVER CIRCUITS (RF UNIT) 4-1-1 ANTENNA SWITCHING CIRCUIT (RF UNIT) The 2nd mixer circuit converts the 1st IF signal to a 2nd IF Received signals from the antenna connector are passed signal. A double conversion superheterodyne system (which through the low-pass filter (L5, L6, C8–C12). The filtered sig- l converts receive signals twice) improves the image rejection nals are applied to the ⁄4 type antenna switching circ
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4-1-6 SQUELCH CIRCUIT (RF AND MAIN UNITS) 4-2-3 DRIVE/POWER AMPLIFIER CIRCUITS (1) NOISE SQUELCH (RF UNIT) The noise squelch circuit cuts out AF signals when no RF sig- The amplifier circuit amplifies the VCO oscillating signal to nals are received. By detecting noise components in the AF the output power level. signals, the squelch circuit switches the AF mute switch. The amplified transmit signal is passed through the antenna A portion of the AF signals from the FM IF IC (RF unit; IC2, switchi
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4-4 POWER SUPPLY CIRCUITS Pin Port Description VOLTAGE LINE number name Outputs data signals to the PLL IC (RF LINE DESCRIPTION 51 PLLDA unit; IC1). BATT The voltage from the connected battery pack. Outputs strobe signals for the PLL IC Common 3 V converted from the BATT line at 52 PLLST (RF unit; IC1). the 3V regulator circuit (IC6). The circuit outputs 3V Outputs control signal for the +3V reg- the voltage regardless of the power ON/OFF 53 POWER ulator circuit (MAIN unit; Q25, D4). condition.
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SECTION 5 ADJUSTMENT PROCEDURES 5-1 PREPARATION REQUIRED TEST EQUIPMENT EQUIPMENT GRADE AND RANGE EQUIPMENT GRADE AND RANGE Output voltage : 4.5 V DC Frequency range : 300–3000 Hz DC power supply Audio generator Current capacity : 1 A or more Measuring range : 1–500 mV Measuring range : 1 mW–1 W Frequency range : 0.1–600 MHz Standard signal RF power meter Frequency range : 300–600 MHz Output level : 0.1 µV–32 mV generator (SSG) (terminated type) Impedance : 50 Ω (–127 to –17 dBm) SWR : Less tha
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5-2 ADJUSTMENT ADJUSTMENT MEASUREMENT POINT ADJUSTMENT ADJUSTMENT CONDITION VALUE UNIT LOCATION UNIT ADJUST REFERENCE 1 • Operating channel : Ch 35 Top Loosely couple a fre- 433.925000 MHz RF C63 FREQUENCY • Transmitting panel quency counter to the antenna. OUTPUT 1 • Operating channel : Ch 35 RF Connect an RF power 9 mW [ITA/–1] RF R206 POWER • Transmitting meter to the RF test 470 mW [CSA/–1] port J1. FM 1 • Operating channel : Ch 01 RF Connect an FM devia- ±4.8 kHz RF R50 DEVIATION •Connect
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C63 Reference frequency adjustment R50 FM deviati R206 Output power J1 RF adjustment GND RF test por ENTERING THE ADJUSTMENT MODE TEST
q Turn the transceiver power OFF.
w While connecting the "TEST" to GND, then turn power ON. 5 - 3
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SECTION 6 PARTS LIST [MAIN UNIT] [MAIN UNIT] REF ORDER REF ORDER DESCRIPTION DESCRIPTION NO. NO. NO. NO. IC1 1140006881 S.IC µPD753036GK-524-BE9 R52 7030003740 S.RESISTOR ERJ3GEYJ 334 V (330 kΩ) IC2 1110002820 S.IC NJM2100M-T1 R53 7030003820 S.RESISTOR ERJ3GEYJ 155 V (1.5 MΩ) IC3 1140004450 S.IC X24C01AS-3.0T6 R54 7030003450 S.RESISTOR ERJ3GEYJ 122 V (1.2 kΩ) IC5 1110004710 S.IC S-80928ANMP-DDR-T2 R55 7030003330 S.RESISTOR ERJ3GEYJ 121 V (120 Ω) IC6 1180001150 S.IC S-81230SG-QB-T1 R56 703000
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[MAIN UNIT] [MAIN UNIT] REF ORDER REF ORDER DESCRIPTION DESCRIPTION NO. NO. NO. NO. C8 4510004630 S.ELECTROLYTIC ECEV1CA100SR W1 7030003860 S.JUMPER ERJ3GE JPW V C9 4030006850 S.CERAMIC C1608 JB 1H 471K-T-A W3 7030003860 S.JUMPER ERJ3GE JPW V C10 4030006850 S.CERAMIC C1608 JB 1H 471K-T-A W4 7030003860 S.JUMPER ERJ3GE JPW V C11 4030006850 S.CERAMIC C1608 JB 1H 471K-T-A W5 9001502002 WIRE 72/98/030/X98/X98 C15 4030011600 S.CERAMIC C1608 JB 1C 104KT-N W6 7120000470 JUMPER ERDS2T0 C17 4550006880 S.T
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[RF UNIT] [RF UNIT] REF ORDER REF ORDER DESCRIPTION DESCRIPTION NO. NO. NO. NO. L206 6200005690 S.COIL ELJRE 18NG-F C6 4030006850 S.CERAMIC C1608 JB 1H 471K-T-A L207 6200005690 S.COIL ELJRE 18NG-F C7 4030007050 S.CERAMIC C1608 CH 1H 220J-T-A L208 6200003640 S.COIL MLF1608K 100K-T C8 4030006970 S.CERAMIC C1608 CH 1H 060D-T-A C9 4030010780 S.CERAMIC C1608 CH 1H 1R5C-T-A C10 4030007010 S.CERAMIC C1608 CH 1H 100D-T-A R1 7030003430 S.RESISTOR ERJ3GEYJ 821 V (820 Ω) C11 4030009470 S.CERAMIC C1608 CH
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[RF UNIT] REF ORDER DESCRIPTION NO. NO. C211 4030006860 S.CERAMIC C1608 JB 1H 102K-T-A J1 6910007660 CONNECTOR IMSA-9210B-1-02T J2 6510018170 S.CONNECTOR 4-175643-4 W4 7030003860 S.JUMPER ERJ3GE JPW V W5 7030003860 S.JUMPER ERJ3GE JPW V W6 7030003860 S.JUMPER ERJ3GE JPW V W8 7030003860 S.JUMPER ERJ3GE JPW V W201 7030003860 S.JUMPER ERJ3GE JPW V W202 7030003860 S.JUMPER ERJ3GE JPW V EP1 0910050351 PCB B 5162A [ITA], [ITA-1] 0910050781 PCB B 5162A [CSA], [CSA-1] S.=Surface mount 6 - 4
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SECTION 7 MECHANICAL PARTS AND DISASSEMBLY 7-1 CABINET PARTS 7-2 ACCESSORIES [CHASSIS PARTS] REF. NO. ORDER NO. DESCRIPTION QTY. MP1 8930045331 2045 Belt clip-1 1 REF. NO. ORDER NO. DESCRIPTION QTY. MP2 8820001040 2045 Screw 1 SP1 2510000960 Speaker K036NA500-26A27 1 EP1 3310002090 Antenna 2045ANT 1 MP1 MP2 MP1 8210015181 Panel 2045 Front Panel-1 [ITA], [CSA] 1 8210016101 Panel 2045 Front Panel (A)-1 1 [ITA-1], [CSA-1] MP2 8210015191 Panel 2045 Rear Panel-1 [ITA], [CSA] 1 8210016111 Panel 2045
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EP1 (C) MP11 (C) MP22 (C) MP24 (C) MP8 (C) MP23 (C) MP9 (C) MP30 (C) MP14 (C) MP25 (C) MP1 (RF) MP20 (C) MP3 (C) MP7 (C) MP13 (C) RF unit MP25 (C) DS2 (M) MP10 (C) MP24 (C) EP1 (M) MP1 (C) MP2 (C) MP4 (C) MAIN unit SP1 (C) MP5 (C) MP12 (C) UNIT abbreviation (C): CHASSIS PARTS, (RF): RF UNIT, (M): MAIN UNIT 7 - 2
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SECTION 8 SEMI-CONDUCTOR INFORMATION • TRANSISTOR AND FET’S 2SA1362 GR 2SA1586 GR 2SB798 DK 2SC3356 R24 2SC4081 S (Symbol: AEG) (Symbol: SG) (Symbol: DK) (Symbol: R24) (Symbol: BS) B B B B B C C C C C C E E E E E 2SC4213 B 2SC4215 O 2SC4226 R25 2SC4228 R44 2SC5108 Y (Symbol: AB) (Symbol: QO) (Symbol: R25) (Symbol: R44) (Symbol: MC) B B B C C C E E E 2SC5194 2SJ144 Y 2SK1829 DTA114 EU DTA144 EU (Symbol: T88) (Symbol: VX) (Symbol: K1) (Symbol: 16) (Symbol: 16) E B B B B S C G C C E D C E E E DTC1
