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VHF FM REPEATER
iC-fr3000
iC-fr3100
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INTRODUCTION DANGER This service manual describes the latest service informa- USE ONLY the specified AC voltage described on the tion for the IC-FR3000/IC-FR3100 VHF FM REPEATER. AC power socket. Other voltages may causes repeater damage or personal injury. Model Version Symbol Frequency range AC supply Power U.S.A. USA DO NOT expose the repeater to rain, snow or any liquids. 100 –120 [V] 50 [W] GEN2 150 –174 [MHz] IC-FR3000 DO NOT reverse the polarities of the power supply when General GEN4
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TABLE OF CONTENTS SECTION 1 SPECIFICATIONS SECTION 2 INSIDE VIEWS SECTION 3 CIRCUIT DESCRIPTION 3 - 1 RECEIVER CIRCUITS ................................................................................................... 3 - 1 3 - 2 TRANSMITTER CIRCUITS ............................................................................................ 3 - 2 3 - 3 PLL CIRCUITS................................................................................................................. 3 - 4 3 - 4 OTHE
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SECTION 1 SPECIFICATIONS IC-FR3000 IC-FR3100 Measurement method EIA / TIA-603 ETS 300 086 [USA2], [GEN2], [GEN4], [GEN74], [EUR2], [FRG2]: 150.000–174.000 MHz Frequency range [GEN74]: 148.000–172.000 MHz Wide (25 kHz): 16K0F3E Type of emission Middle (20 kHz): 14K0F3E Narrow (12.5 kHz): 8K50F3E [USA2], [GEN2], [GEN4], [GEN74], [EUR2]: 25/12.5 kHz Channel spacing [FRG2]: 20/12.5 kHz Frequency stability ±2.5 ppm ±1.0 kHz Number of channels Max. 32 channel Antenna connector Type-N × 2 (50 Ω ) [USA2
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SECTION 2 INSIDE VIEWS • BOARD LAYOUT *: Located under side of this point. JACK2 unit* JACK1 unit* REG unit PA unit TX unit RX unit LOGIC unit* FRONT unit • PA UNIT Top view Power amplifier (IC2:S-AV32 50 W type S-AV33 25 W type) APC CTRL (IC1: TA75S01F Q9: DTC143ZU Q10: DTC114EU) Pre-drive (Q4: 2SK3475) +9 V switch (Q7: DTC114EU Q8: 2SA1362) +5 V regulator (IC7: TA78L05) 2 - 1
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• LOGIC UNIT Top view Ringer detect circuit (IC48: TLP121) DTMF decoder (IC30: TC4W53FU, IC31: LC7387M) CTCSS decoder (IC29: FX805LG) EEPROM (IC37: HN58X2464TI) CPU (IC33: HD64F2238BF) Splatter filter (IC4: NJM2902V) D/A converter (IC25: M62364) Temperature switching Mic mix amplifier circuit (IC32: TC4W53) (IC2: NJM2902V) AF amplifier (IC17: LA4425A) Mic amplifier (IC1: NJM2902V) LED current CTRL (Q18, Q19, Q20: XP1114) Mic mute (IC13: BU4066) Bottom view ON-HOOK signal output RESET (IC45:
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• TX UNIT Top view *: Located under side of this point. TX VCO circuit Mixer (IC6: NJM2107F) D/A converter* (IC5: M62364FP) PLL reference oscillator 12.8 MHz (X1: CR-759) PLL IC* (IC2: MB1511PFV) • RX UNIT Top view *: Located under side of this point. PLL IC* RF amplifier (IC4: MB1511PFV) (Q1: 2SC5337) 1st Mixer (IC1: GN2011) Lo amplifier* (Q8: 2SC4226, Q9: 2SC4703) RX VCO circuit IF amplifier (Q3: 2SK1771) 2nd Lo oscillator Reference oscillator Noise amplifier IF IC 31.195 MHz 12.8 MHz (I
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SECTION 3 CIRCUIT DESCRIPTION local oscillator section and X2 generate 31.195 MHz for the 3-1 RECEIVER CIRCUITS 2nd LO signal. 3-1-1 RF CIRCUIT (RX UNIT) Received signals from the RX antenna connector enter the The 455 kHz 2nd IF signal is applied to a ceramic bandpass RX unit J1 and pass through a tuned bandpass filter (D3, filter (narrow; FI5, wide; FI6) where unwanted signals are D4, L2, L3, C5–C8, C12, C13, C205, C206, C220, 221) suppressed and are then applied to a limiter amplifier sec- wh
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3-1-6 RECEIVER MUTE CIRCUITS (LOGIC UNIT) nal is applied to the CPU (IC 33) via the serial signal line. • NOISE SQUELCH The DTCS signal passes through a low-pass filter circuit The noise squelch circuit cuts out AF signals when no RF (IC12, pins 1, 3, 8, 10), and is then applied to the signal signals are received. By detecting noise components in the amplifier (IC12, pins 12, 14). the amplified signal is applied AF signals, the squelch circuit switches the AF mute switch. to the DTCS decoder wh
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ulate the oscillated signal (TVCO unit; D5) and modulate the The filtered signals are applied to the limiter amplifier (IC3), oscillated signal at VCO circuit (TVCO; Q1, D1–D4). The and are then mixed with the DTMF signal from the CPU modulated VCO output is amplified at the buffer amplifier (IC33, pin 43) via the TX-signal filter (IC3, pins 8, 10, 12, 14). (Q1) and is then applied to the drive amplifier circuit on the The mixed signals are applied to the splatter filter (IC4), and PA unit. are
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detected voltage exceeds the power setting voltage. Then R81, R136, R137). The filtered signal is applied to the 1st the output voltage of the APC amplifier IC (IC1, pin 4) con- mixer circuit (RX unit; IC1) as 1st LO signal. trols the input current of the drive amplifier (Q4) and power A part of the signal is applied to the PLL IC (RX unit; IC4) via amplifier IC (IC2, pin 2) to reduce the output power. the amplifier (RX unit; Q14) as RX PLL lock voltage. 3-3-5 TRANSMITTER PLL CIRCUIT (TX UNIT)
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3-5 POWER SUPPLY CIRCUITS 3-4 OTHER CIRCUITS 3-5-1 LOGIC AND REG UNITS VOLTAGE LINES 3-4-1 TELEPHONE IF CIRCUIT (LOGIC UNIT) The signals from the telephone line (FRONT, J13) are Description Line applied to the ringer detect circuit (IC48, D1, D5, R131, The voltage from the DC power unit (CHASSIS; R143, R145, C100, C103, C375). The detected signals are PS 15V applied to the CPU (IC33, pin 73) via “RING” line. The EP1). “HOOKC” signal from the CPU (IC33, pin 72) and the “DP” The same voltage as th
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3-6 PORT ALLOCATIONS 3-6-1 EXPANDER IC (LOGIC UNIT; IC39) 3-6-3 EXPANDER IC (LOGIC UNIT; IC41) Pin Port Pin Port Description Description number name number name Outputs the control signal for “BASE” Outputs the switch control signal for 4 BASL LED on the FRONT unit. 5 R/BSW the received AF signal to the micro- phone amplifier. Outputs the control signal for 5 RMTL “REMOTE” LED on the FRONT unit. Outputs the control signal for nar- 6 W/NS row/wide bands. Outputs the control signal for “BUSY” 6 B
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3-6-5 D/A CONVERTER IC (TX UNIT; IC5) 3-6-6 CPU (LOGIC UNIT; IC33) Pin Port Pin Port Description Description number name number name Input port for the TONE signal from Outputs the strobe signal for the PLL 1 ETONE 1 RPLSTB the ACC connector. IC on the RX unit. Outputs the adjusted external TONE Outputs the strobe signal for the PLL 2 ETONEO 2 TPLSTB signal. IC on the TX unit. Outputs the TX AF signal to the TX Input port for the unlock signal from 3 TXAFO 3 TUNLK modulation. the PLL IC on the T
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CPU-Continued CPU-Continued Pin Port Pin Port Description Description number name number name Input port for the RV SWR signal from Outputs the strobe signal for the port 47 RVSWR 89 PE3STB the PA unit. expander IC (LOGIC unit; IC41). Outputs the strobe signal for the port Input port for the temperature signals 90 PE2STB 48 TEMP of PA and REG units. expander IC (LOGIC unit; IC40). Outputs the strobe signal for the port Input port for the VCO lock voltage to 91 PE1STB 49 T/RLV expander IC (LOGIC
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SECTION 4 ADJUSTMENT PROCEDURES 4-1 PREPARATION Some adjustments must be performed on the “ADJUSTMENT MODE”. CS-FR3000 CLONING SOFTWARE, OPC-478 CLONING CABLE and OPC-592 ADAPTOR CABLE are required when entering the adjustment mode. Refer to the next page in detail. REQUIRED TEST EQUIPMENT EQUIPMENT GRADE AND RANGE EQUIPMENT GRADE AND RANGE Output voltage : 13.6 V DC [FR3000] Frequency range : 300–3000 Hz Audio generator 13.2 V DC [FR3100] Output level : 1–500 mV DC power supply Current capaci
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BEFORE ENTERING THE ADJUSTMENT MODE CAUTION!: Need to back up the original memory data using CS-FR3000 before cloning the adjustment frequencies. When program the adjustment frequencies into the repeater, the repeater’s memories channels will be overwritten the data and deleted original memory data at the same time. Need to do cloning “Adjustment Mode Access” permitting and adjustment frequency into the CPU using CS-FR3000 before entering the adjustment mode. Otherwise, the repeater can not en
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ENTERING THE ADJUSTMENT MODE [CH-DN] 1 Turn the power OFF. [POWER] [CH-UP] 2 While pushing and holding both [CH-DN] and [CH-UP], turn ON. Never release [CH-DN] and [CH-UP] until 1 short beep sounds. 3 Push [CH-DN] button, then sounds 2 beep audio. OPERATING IN THE ADJUSTMENT MODE • Change the item (including frequency) (+1). : Push [CH-UP] button. • Change the item (including frequency) (–1). : Push [CH-DN] button. • Adjust the specified value (+1). : Push [PRT/BASE] button. • Adjust the spe
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ADJUSTMENT MODE CH LIST [Other] (MHz) [GEN74] (MHz) W/N CH LCD DISPLAY ADJUSTMENT A01 LW TXREF 127 A01 173.925 (RX) 171.925 (RX) W TVCO/RVCO adjustment. 173.725 (TX) 171.725 (TX) Reference frequency adjustment. A02 LW HRTUN 115 A02 173.925 (RX) 171.925 (RX) W RX sensitivity adjustment. 173.725 (TX) 171.725 (TX) A03 LW MRTUN 088 A03 162.075 (RX) 160.075 (RX) W RX sensitivity adjustment. 162.275 (TX) 160.275 (TX) A04 LW LRTUN 055 W A04 150.075 (RX) 148.075 (RX) RX sensitivity adjustment. 150.275
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4-2 PLL ADJUSTMENT MEASUREMENT ADJUSTMENT ADJUSTMENT ADJUSTMENT CONDITIONS VALUE UNIT LOCATION UNIT ADJUST TX VCO LOCK 1 • LCD display : A01 LW TXREF 127 TX Connect the digital 4.0 V TVCO C17 VOLTAGE • Transmitting multi meter or oscillo- scope to check point CP4. RX VCO LOCK 1 • LCD display : A01 LW TXREF 127 RX Connect the digital 4.0 V RVCO C17 VOLTAGE • Receiving multi meter or oscillo- scope to check point CP3. REFERENCE 1 • Wait for 5 minutes after power ON. REAR Loosely couple a fre- 171.
