Icom IC-FR4000 Service Manual
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Icom IC-FR4000 Service Manual

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UHF FM REPEATER
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Summary of Contents for Icom IC-FR4000

  • Page 1 UHF FM REPEATER iC-fr4000...
  • Page 2 DO NOT short any circuits or electronic parts. An insu- lated tuning tool MUST be used for all adjustments. <SAMPLE ORDER> DO NOT keep power ON for a long time when the re- 1110003780 S.IC NJM2902V IC-FR4000 LOGIC UNIT 1 piece peater is defective. 8930056450 2368 6-key IC-FR4000 CHASSIS...

  • Page 3: Table Of Contents

    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 - 3 3 - 3 PLL CIRCUITS......................... 3 - 4 3 - 4 THE OTHER CIRCUITS ....................
  • Page 4 SECTION 1 SPECIFICATIONS ‘ ‘ GENERAL • Frequency range : 450–480 MHz • Type of emission : 16K0F3E / 8K50F3E • Frequency resolution : 25 or 12.5 kHz • Number of channels : Max. 32 channel :N-type × 2 (50 Ω) •...
  • Page 5 SECTION 2 INSIDE VIEWS • BOARD LAYOUT *: Located under side of this point. JACK2 unit* JACK1 unit* REG unit 50PA unit TX unit RX unit LOGIC unit* FRONT unit • 50PA UNIT Top view Power amplifier (Q2: 2SC3102) Pre-drive (IC1: SC-1323) Temp sensor (IC4: NJM2107F...

  • Page 6: Logic Unit

    • LOGIC UNIT Top view Ringer detect circuit (IC33: HD64F2238F) OFF-HOOK CTRL (IC47: LC73701M, DTMF decoder IC50: TC4W53) (IC30: TC4W53, IC31: LC738M) CTCSS decoder (IC29: FX805) EEPROM (IC39: BU4094) (IC33: HD64F2238F) Splatter filter (IC4: NJM2902V) D/A converter (IC25: M62364) Temperature switching Mic mix amplifier (IC32: TC4W53) (IC2: NJM2902V)
  • Page 7 • 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-732) PLL IC* (IC2: MB15A02PFV1) • RX UNIT Top view *: Located under side of this point. PLL IC* RF amplifier (IC4: MB15A02PFV1)

  • Page 8: Receiver Circuits

    SECTION 3 CIRCUIT DESCRIPTION 3-1 RECEIVER CIRCUITS suppressed, and are then applied to a limiter amplifier sec- tion in the system IC (IC2, pin 5). 3-1-1 RF CIRCUIT (RX UNIT) Received signals from the RX antenna connector enter the IC2 contains the 2nd mixer, limiter amplifier, quadrature RX unit J1 and pass through a tuned bandpass filter ( D3, detector, active filter and noise amplifier circuits, etc.

  • Page 9: Transmitter Circuits

    3-1-6 RECEIVER MUTE CIRCUITS (LOGIC UNIT) The DTCS signal passes through the low-pass filter circuit (IC12), and is then applied to the DTCS decoder which is • NOISE SQUELCH inside the CPU (IC33, pin 52) via the “DTCSI” line. The noise squelch circuit cuts out AF signals when no RF signals are received.
  • Page 10 • IN CASE OF THE AF SIGNAL FROM THE ANTENNA 3-2-3 DRIVE AMPLIFIER CIRCUIT (PA UNIT) CONNECTOR The drive amplifier circuit amplifies the VCO oscillating sig- The AF signals (received signals) from the antenna connec- nal to the level needed at the power amplifier. tor (RX unit;...

  • Page 11: Pll Circuits

    rent of the drive amplifier (IC1, pin 2) to reduce the output amplifier (Q14) as RX PLL lock voltage. power. 3-3-5 TRANSMITTER PLL CIRCUIT (TX UNIT) The PLL IC (IC2) which includes in the prescaler, the pro- 3-3 PLL CIRCUITS grammable counter and the phase comparator.

  • Page 12: Power Supply Circuits

    3-5 POWER SUPPLY CIRCUITS 3-4 OTHER CIRCUIT 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 Line Description applied to the ringer detect circuit (C100, C103, C375, R131, D1, D5, R143, R145, IC48).

  • Page 13: Port Allocations

    3-6 PORT ALLOCATIONS 3-6-3 EXPANDER IC (LOGIC UNIT; IC41) 3-6-1 EXPANDER IC (LOGIC UNIT; IC39) Port Port Description Description number name number name Outputs the control signal for “BASE” Outputs the switch control signal for BASL LED on the FRONT unit. R/BSW the received AF signal to the micro- phone amplifier.
  • Page 14 3-6-5 D/A CONVERTER IC (TX UNIT; IC5) 3-6-6 CPU (LOGIC UNIT; IC33) Port Port Description Description number name number name Input port for the TONE signal from Outputs the strobe signal for the PLL ETONE RPLSTB the ACC connector. IC on the RX unit. Outputs the adjusted external TONE Outputs the strobe signal for the PLL ETONEO...
  • Page 15 CPU-Continued CPU-Continued Port Port Description Description number name number name Input port for the RV SWR signal from Outputs the strobe signal for the port RVSWR PE3STB the PA unit. expander IC (LOGIC unit; IC41). Input port for the temperature signals Outputs the strobe signal for the port TEMP PE2STB...

  • Page 16: Preparation

    SECTION 4 ADJUSTMENT PROCEDURES 4-1 PREPARATION When adjusting the contents on page 4-7, a JIG CABLE is required. Some adjustments must be performed on the “ADJUSTMENT MODE”. Refer to the next page in detail. I REQUIRED TEST EQUIPMENT EQUIPMENT GRADE AND RANGE EQUIPMENT GRADE AND RANGE Output voltage...
  • Page 17 I ENTERING THE ADJUSTMENT MODE 1 Turn the power OFF. 2 Push and hold [CH-DN] and [CH-UP] buttons, then turn the power ON, keep on pushing [CH-DN] and [CH-UP] buttons until sounds 1 beep audio. 3 Push [CH-DN] button, then sounds 2 beep audio. I EXITING THE ADJUSTMENT MODE 1 Turn the power OFF.
  • Page 18 ADJUSTMENT MODE CH LIST LCD DISPLAY BAND ADJUSTMENT 479.275 450.275 A01 LW TXREF *** TVCO/RVCO adjustment. Reference frequency adjustment. 465.075 465.275 RX sensitivity adjustment. A03 LW MRTUN *** 450.075 450.275 RPT SQL adjustment. A05 LW RPTSQL*** 450.075 450.275 TX power adjustment. A06 HW POWER *** 465.075 465.275...
  • Page 19 4-2 PLL ADJUSTMENT MEASUREMENT ADJUSTMENT ADJUSTMENT ADJUSTMENT CONDITIONS VALUE UNIT LOCATION UNIT ADJUST TX VCO LOCK • LCD display : A01 LW TXREF Connect a digital multi 1.0 V TVCO VOLTAGE • Receiving meter or oscilloscope to check point CP1. RX VCO LOCK •...
  • Page 20 • IC-FR4000 TOP VIEW TX UNIT RX UNIT • RX UNIT TOP VIEW • TX UNIT TOP VIEW CP18 RX VCO lock voltage RX VCO lock voltage chack point adjustment TX VCO lock voltage check point Reference frequency check point...
  • Page 21 4-3 RX ADJUSTMENT MEASUREMENT ADJUSTMENT ADJUSTMENT ADJUSTMENT CONDITIONS VALUE UNIT LOCATION UNIT ADJUST • LCD display : A03 LW MRTUN Connect a digital multi Maximum SENSITIVITY • Connect a standard signal generator meter or oscilloscope voltage to the RX antenna connector and set to check point CP18.

  • Page 22: Software Adjustment

    4-4 SOFTWARE ADJUSTMENT Select an operation using [CH-UP] / [CH-DN] keys, then set specified value using [RPT/BASE] / [MONI] keys on the FRONT PANEL. MEASUREMENT ADJUSTMENT ADJUSTMENT CONDITION VALUE UNIT LOCATION OUTPUT • LCD display : A06 HW POWER Rear Connect an RF power meter to 50.0 W POWER...

  • Page 23: Reg Unit

    SECTION 5 PARTS LIST [REG UNIT] [REG UNIT] ORDER ORDER DESCRIPTION DESCRIPTION 1180001320 IC NJM7809FA 4030006860 S.CERAMIC C1608 JB 1H 102K-T 1180002290 S.IC NJM7809DL1A-TE 4510007660 ELECTROLYTIC LXZ25VB100 1180001860 S.IC TA78M05F (TE16L) 4030006860 S.CERAMIC C1608 JB 1H 102K-T 1180002480 S.REG TA78DL12AF (TE16L) 4510007650 S.ELECTROLYTIC EEVHB1C470P 1180001540 S.IC TA78L08F (TE12R)

  • Page 24: Front Unit

    [FRONT UNIT] [FRONT UNIT] ORDER ORDER DESCRIPTION DESCRIPTION 1530002060 S.TRANSISTOR 2SC4081 T106 R 6910014540 SPACER LM-10 1750000930 S.DIODE NNCD8.2C-T1 1750000930 S.DIODE NNCD8.2C-T1 1750000930 S.DIODE NNCD8.2C-T1 [LOGIC UNIT] 6200001620 S.COIL ELJFC 1R0K-F ORDER DESCRIPTION ERJ3GEYJ 471 V (470 Ω) 7030003400 S.RESISTOR 1110003780 S.IC NJM2902V-TE1 ERJ3GEYJ 100 V (10 Ω)
  • Page 25 [LOGIC UNIT] [LOGIC UNIT] ORDER ORDER DESCRIPTION DESCRIPTION ERJ3GEYJ 681 V (680 Ω) 1590002430 S.TRANSISTOR DTA144EE TL 7030003420 S.RESISTOR 1510000590 S.TRANSISTOR 2SA1362-Y (TE85L) 7030003510 S.RESISTOR ERJ3GEYJ 392 V (3.9 kΩ) 1160000150 S.TRANSISTOR IMZ4 T108 7030003480 S.RESISTOR ERJ3GEYJ 222 V (2.2 kΩ) ERJ3GEYJ 271 V (270 Ω) 1590001960 S.TRANSISTOR XP4311 (TX)
  • Page 26 [LOGIC UNIT] [LOGIC UNIT] ORDER ORDER DESCRIPTION DESCRIPTION R128 7030003680 S.RESISTOR ERJ3GEYJ 104 V (100 kΩ) R230 7030003640 S.RESISTOR ERJ3GEYJ 473 V (47 kΩ) MCR100JZHJ 10 Ω (100) R129 7030006480 S.RESISTOR R231 7030003640 S.RESISTOR ERJ3GEYJ 473 V (47 kΩ) R130 7030003620 S.RESISTOR ERJ3GEYJ 333 V (33 kΩ) R232...
  • Page 27 [LOGIC UNIT] [LOGIC UNIT] ORDER ORDER DESCRIPTION DESCRIPTION R341 7030003510 S.RESISTOR ERJ3GEYJ 392 V (3.9 kΩ) R493 7030003480 S.RESISTOR ERJ3GEYJ 222 V (2.2 kΩ) R342 7030003510 S.RESISTOR ERJ3GEYJ 392 V (3.9 kΩ) R494 7030003640 S.RESISTOR ERJ3GEYJ 473 V (47 kΩ) R345 7030003500 S.RESISTOR ERJ3GEYJ 332 V (3.3 kΩ)
  • Page 28 [LOGIC UNIT] [LOGIC UNIT] ORDER ORDER DESCRIPTION DESCRIPTION 4030006860 S.CERAMIC C1608 JB 1H 102K-T C161 4030007090 S.CERAMIC C1608 CH 1H 470J-T 4030008850 S.CERAMIC C1608 JB 1H 123K-T C162 4030007090 S.CERAMIC C1608 CH 1H 470J-T 4030010760 S.CERAMIC C1608 CH 1H 331J-T C163 4030007090 S.CERAMIC C1608 CH 1H 470J-T...
  • Page 29 [LOGIC UNIT] [LOGIC UNIT] ORDER ORDER DESCRIPTION DESCRIPTION C250 4030011600 S.CERAMIC C1608 JB 1E 104K-T C407 4030011600 S.CERAMIC C1608 JB 1E 104K-T C251 4030011600 S.CERAMIC C1608 JB 1E 104K-T C408 4030007090 S.CERAMIC C1608 CH 1H 470J-T C252 4030011600 S.CERAMIC C1608 JB 1E 104K-T C409 4030006870 S.CERAMIC C1608 JB 1H 222K-T...
  • Page 30 [LOGIC UNIT] [RX UNIT] ORDER ORDER DESCRIPTION DESCRIPTION 8900009230 CABLE OPC-908 (P=1 N=10 L=60) 1190000450 S.IC GN2011-Q (TX) 8900008740 CABLE OPC-867 (P=1 N=24 L=60) 1110003490 S.IC TA31136FN (D,EL) 7030003860 S.JUMPER ERJ3GE JPW V 1180000420 S.IC TA78L05F (TE12R) 7030007150 S.JUMPER MCR50JZHJ JPW 1140005990 S.IC MB15A02PFV1-G-BND-ER 8900009270 CABLE...
  • Page 31 [RX UNIT] [RX UNIT] ORDER ORDER DESCRIPTION DESCRIPTION 7030003670 S.RESISTOR ERJ3GEYJ 823 V (82 kΩ) R155 7030003520 S.RESISTOR ERJ3GEYJ 472 V (4.7 kΩ) 7030003680 S.RESISTOR ERJ3GEYJ 104 V (100 kΩ) R156 7030003620 S.RESISTOR ERJ3GEYJ 333 V (33 kΩ) 7030003680 S.RESISTOR ERJ3GEYJ 104 V (100 kΩ) R157 7030003680 S.RESISTOR...
  • Page 32 [RX UNIT] [RX UNIT] ORDER ORDER DESCRIPTION DESCRIPTION 4030006860 S.CERAMIC C1608 JB 1H 102K-T C199 4030006860 S.CERAMIC C1608 JB 1H 102K-T 4030006860 S.CERAMIC C1608 JB 1H 102K-T C200 4030006860 S.CERAMIC C1608 JB 1H 102K-T 4510004630 S.ELECTROLYTIC ECEV1CA100SR C201 4550006250 S.TANTALUM TEMSVA 1A 106M-8L 4550000460 S.TANTALUM TESVA 1C 105M1-8L...
  • Page 33 [RVCO UNIT] [TX UNIT] ORDER ORDER DESCRIPTION DESCRIPTION 1560001280 S.FET 2SK508 K53 T1B 1180000420 S.IC TA78L05F (TE12R) 1530002920 S.TRANSISTOR 2SC4226-T1 R25 1140005990 S.IC MB15A02PFV1-G-BND-ER 1110002400 S.IC NJM2107F-TE1 1180000430 S.IC TA78L06F (TE12L) 1720000640 S.VARICAP 1SV284 (TPH3) 1190001350 S.IC M62364FP 600D 1720000640 S.VARICAP 1SV284 (TPH3) 1110002400 S.IC NJM2107F-TE1...
  • Page 34 [TX UNIT] [TX UNIT] ORDER ORDER DESCRIPTION DESCRIPTION 7030003520 S.RESISTOR ERJ3GEYJ 472 V (4.7 kΩ) 4550006250 S.TANTALUM TEMSVA 1A 106M-8L 7030003480 S.RESISTOR ERJ3GEYJ 222 V (2.2 kΩ) 4030006860 S.CERAMIC C1608 JB 1H 102K-T 7030003520 S.RESISTOR ERJ3GEYJ 472 V (4.7 kΩ) 4510004630 S.ELECTROLYTIC ECEV1CA100SR 7030003480 S.RESISTOR ERJ3GEYJ 222 V (2.2 kΩ)
  • Page 35 [TVCO UNIT] [50PA UNIT] ORDER ORDER DESCRIPTION DESCRIPTION 1530000371 S.TRANSISTOR 2SC3356-T1B R25 1150001680 IC S-AU27AM (ICOM) / SC-1323 1530002920 S.TRANSISTOR 2SC4226-T1 R25 1110002750 S.IC TA75S01F (TE85R) 1180001250 S.IC TA7808F (TE16L) 1110002400 S.IC NJM2107F-TE1 1720000640 S.VARICAP 1SV284 (TPH3) 1180000420 S.IC TA78L05F (TE12R) 1720000640 S.VARICAP...
  • Page 36 [50PA UNIT] [50PA UNIT] ORDER ORDER DESCRIPTION DESCRIPTION 7030003560 S.RESISTOR ERJ3GEYJ 103 V (10 kΩ) 4030018430 S.CERAMIC ERF22X 6C2H 6R0D D01L MCR10EZHJ 22 Ω (220) 7030000180 S.RESISTOR 4030009500 S.CERAMIC C1608 CH 1H 0R5B-T ERJ3GEYJ 101 V (100 Ω) 7030003320 S.RESISTOR 4030009530 S.CERAMIC C1608 CH 1H 030B-T 7030003560 S.RESISTOR...
  • Page 37 [VR UNIT] [JACK2 UNIT] ORDER ORDER DESCRIPTION DESCRIPTION 7210003110 VARIABLE RK0971110 10KA 1750000930 S.DIODE NNCD8.2C-T1 7210003120 VARIABLE RK0971110 10KB 1750000930 S.DIODE NNCD8.2C-T1 1750000930 S.DIODE NNCD8.2C-T1 1750000930 S.DIODE NNCD8.2C-T1 6510018950 S.CONNECTOR B7B-PH-SM3-TB 1750000930 S.DIODE NNCD8.2C-T1 1750000930 S.DIODE NNCD8.2C-T1 1750000930 S.DIODE NNCD8.2C-T1 0910056093 PCB B 5653C 1750000930 S.DIODE...
  • Page 38 [CHASSIS UNIT] ORDER DESCRIPTION 6510022970 CONNECTOR N-PA-JJ (NI) 2510001200 SPEAKER C057FA510-10 2710000750 FAN FBA08A12LZ 2710000740 FAN FBA06A12L 8900011510 CABLE OPC-1048 (AC INPUT CABLE) 8900011520 CABLE OPC-1049 (POWER SW CABLE) 8900011530 CABLE OPC-1050 (BACKUP DC CABLE) 8900011540 CABLE OPC-1052 (PS OUTPUT CABLE) 8900011550 CABLE OPC-1053 (REG-LOGIC CABLE) 8900011560 CABLE...
  • Page 39 SECTION 6 OPTION UNIT INSTALLATION I Opening the repeater’s case Follow the case and cover opening procedures shown here when an optional unit is installed or adjust the in- ternal units, etc. CAUTION: DISCONNECT the AC power cable and/or DC power cable from the repeater. Other- wise, there is danger of electric shock and/or equip- ment damage.
  • Page 40 SECTION 7 MECHANICAL PARTS AND DISASSEMBLY [CHASSIS PARTS] [LOGIC UNIT] ORDER ORDER QTY. QTY. DESCRIPTION DESCRIPTION 8900011520 OPC-1049 (Power SW cable) 5210000030 Fuse FGB 1A (FGB0 125V) 8900011570 OPC-1055 (LOGIC-JACK2 cable A) 5220000020 Fuse holder S-N5051 8900011580 OPC-1056 (LOGIC-JACK2 cable B) 5220000020 Fuse holder S-N5051 8900011590...
  • Page 41 MP17 MP84 FRONT UNIT MP84 MP82 W5 (L) EP2 (F) MP69 MP84 JACK1 UNIT MP82 W4 (L) MP84 MP68 EP3 (F) MP82 MP16 EP4 (F) EP7 (F) MP84 MP86 MP68 EP6 (F) MP82 MP27 EP5 (F) MP10 MP68 MP84 MP86 W3 (L) MP85 MP68...
  • Page 42 MP64 MP64 MP100 MP18 MP64 MP64 MP100 MP64 NOTE MP64 (R): REG UNIT MP54 MP55 (RX): RX UNIT MP54 MP55 (TX): TX UNIT (PA): 50PA UNIT MP64 MP74 (RVCO): RVCO UNIT MP64 MP53 (TVCO): TVCO UNIT MP74 MP53 to EP7 (R) to EP2 (PA) MP74 to EP8 (R)
  • Page 43 [CHASSIS PARTS] [RX UNIT] ORDER ORDER QTY. DESCRIPTION QTY. DESCRIPTION 8510015120 2368 A-case 6510022970 Connector N-PA-JJ(NI) 8510015130 2368 B-case 8510015140 2368 E-case 8900011510 OPC-1048 (AC input cable) 8930059680 Sponge (HD) 8900011520 OPC-1049 (Power SW cable) 8930059680 Sponge (HD) 8900011530 OPC-1050 (Back up DC cable) 8900011540 OPC-1052 (PS output cable) 8900011550...
  • Page 44 SECTION 8 SEMI-CONDUCTOR INFORMATION 8 - 1 TRANSISTORS AND FETS 8 - 2 DIODES 2SA1362-Y 2SA1576A T106R 2SB1143 T 2SB1182 TL Q 2SC2712-BL/GR 1SR154-400 TE25 1SS226 (TE85R) 1SS268 (TE85R) 1SS319 (TE85R) 1SS355 TE-17 (Symbol: AEY) (Symbol: FR) (Symbol: B1143 (Symbol: B1182, Q) (Symbol: BL/LG) (Symbol: 14) (Symbol: C3)

  • Page 45: Front Unit

    The combination of this page and the next page shows SECTION 9 BOARD LAYOUTS the unit layout in the same configuration as the actual P.C. Board. 9 - 1 FRONT UNIT ¡ TOP VIEW to LCD DS7 2 4 6 8 9 - 2 VR UNIT 9 - 3 TVCO UNIT 9 - 4 RVCO UNIT...
  • Page 46 FRONT UNIT The combination of this page and the previous page shows the unit layout in the same configuration as the ¡ ¡ BOTTOM VIEW to LOGIC UNIT J4 actual P.C. Board. to LOGIC UNIT J3 to LOGIC UNIT – to JACK1 UNIT J3 RVCO UNIT...

  • Page 47: Logic Unit

    9 - 5 LOGIC UNIT The combination of this page and the next page shows the unit layout in the same configuration as the actual ¡ ¡ TOP VIEW P.C. Board. to JACK1 UNIT J3 to JACK2 UNIT J2 to JACK2 UNIT J3 3 4 5 6 7 8 9 10 11 12 13 SQLVRI SQLVRO...
  • Page 48 to OPTIONAL UNIT LOGIC UNIT The combination of this page and the previous page shows the unit layout in the same configuration as the ¡ ¡ BOTTOM VIEW actual P.C. Board. MICO SDTO MICI RPLSTB to RX UNIT J2 RUNLK W/NS RSSI to OPTIONAL...
  • Page 49 9 - 6 RX UNIT The combination of this page and the next page shows the unit layout in the same configuration as the actual ¡ ¡ TOP VIEW RX ANT P.C. Board. RX OUT to LOGIC UNIT J1 9 - 5...
  • Page 50 RX UNIT The combination of this page and the previous page shows the unit layout in the same configuration as the ¡ ¡ BOTTOM VIEW actual P.C. Board. RX OUT 9 - 6...
  • Page 51 9 - 7 TX UNIT The combination of this page and the next page shows to 50PA UNIT the unit layout in the same configuration as the actual ¡ ¡ TOP VIEW P.C. Board. to LOGIC UNIT J2 FWSWR RVSWR PATEMP TMUTE2 ETONE...
  • Page 52 TX UNIT The combination of this page and the previous page shows the unit layout in the same configuration as the ¡ ¡ BOTTOM VIEW actual P.C. Board. 9 - 8...

  • Page 53: Pa Unit

    9 - 8 50PA UNIT The combination of this page and the next page shows the unit layout in the same configuration as the actual ¡ ¡ TOP VIEW P.C. Board. C125 C126 1 2 3 TX ANT 8 - 9 VARISTER UNIT ¡TOP VIEW to REG UNIT to REG UNIT...
  • Page 54 50PA UNIT The combination of this page and the previous page shows the unit layout in the same configuration as the ¡ ¡ BOTTOM VIEW actual P.C. Board. VARISTER UNIT ¡BOTTOM VIEW) 9 - 10...

  • Page 55: Reg Unit

    AC IN 9 - 10 REG UNIT POWER The combination of this page and the next to LOGIC UNIT J6 PS 0V page shows the unit layout in the same BATTERY ¡ ¡ TOP VIEW DC SUPPLY PS 15V configuration as the actual P.C. Board. to LOGIC to PA FAN to REG FAN...
  • Page 56 REG UNIT The combination of this page and the previous page shows the unit layout in the same configuration as the ¡BOTTOM VIEW actual P.C. Board. BATTERY BATTERY to 50PA to 50PA PS 15V PS 0V PS 0V UNIT EP2 PS 15V –...
  • Page 57 SECTION 10 BLOCK DIAGRAM SCK,SDTO,DA1STB,TPLSTB IC13: BU4066BCFV TUNLK IC1: NJM2902V IC4D IC4: NJM2902V MIC MUTE Q1: XP1214 IC1D PATEMP from FRONT UNIT SW-D CTDTO FWSWR TONE IC2: NJM2902V IC3: NJM2902V from CPU RVSWR IC4A, B, C IC2D IC2C IC2A, B IC3A IC3B UNIT...
  • Page 58 IC5: TA78L05F IC1: TA78L05F VARISTOR UNIT D1: MA29W B D4: MA2S111 IC4: TA78L06F TVCO UNIT Q6: 2SC3661 PATEMP RIPLE D1: 1SV284 FILTER D2: HSU88 IC4: NJM2107F D2: 1SV284 D4: HSU88 D3: 1SV284 IC5: M62364FP D5: MA8047M D4: 1SV284 Q2: 2SC4226 D5: 1SV284 D6: MA8047M Q2: 2SC3102...
  • Page 59 SECTION 11 VOLTAGE DIAGRAM REMOTE REMOTE SP MUTE FREE: 4.7V SPMUTE PUSH: 0.0V S7 SKQDPB S8 SKQDPB MICE 5.0V 3.8V to LOGIC UNIT J4 CLONE M PTT M MONI REMOTE SP MUTE REP/BASE MONI MSC-C161UYLY-4W FREE: 4.2V S6 SKQDPB PUSH: 0.0V S5 SKQDPB Q1 2SC4081 to JACK1 UNIT J3...
  • Page 60 0.001 3.3k 22nH 0.22µH 0.001 3.5V RX RFIN 0.01 10nH 0.001 0.001 10nH GN2011-Q 0.001 0.001 RX ANT 458DB-1011 458DB-1011 C182 C210 22nH 22nH C153 2SC5337 R181 22nH 22nH 0.001 2.7V SA05C401N 3.1V 3.1V C152 3.1V 1SS226 3.1V 0.001 3.3k 0.001 470p 0.001...
  • Page 61 1µH TVCO UNIT 0.001 100p 2SC3356 100p 15nH 0.001 1SV308 22nH 22nH 0.001 7.9V 2SC4703 to 50PA UNIT 2.6V 0.6V 100p 18nH C121 100p 0.001 0.001 100p 22nH 4.7k 10nH 2SC3356 27nH TX OUT 8.2k 0.5p 0.1µH 0.1µH 2.2V 2.5p 2.2k TX OUT 4.7k...
  • Page 62 C383 22p C366 R453 10 LIMIT S MIX IC4A IC4C SPLATTER FILTER IC2A IC3A IC2C IC2B MIC MIX PRE-EMP NJM2902V NJM2902V C380 IC13 IC3B R497 2.5V NJM2902V NJM2902V R23 330k R118 5.0V NJM2902V NJM2902V 4.7k BU4066BCFV 100k NJM2902V 2.0V C408 1.9V C364 C382...
  • Page 63 Mount B-Side to FRONT UNIT J2 to FRONT UNIT J1 to RX UNIT J2 to TX UNIT J3 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 13.6V L4 BLM31PG121SN1...
  • Page 64 SC-1323 470p 0.001 470p C125 C126 C119 470p C112 100p LA-559 LA-560 LA-559 TXRFOUT TX ANT 2SC3102 Y655LY-03K=P3 Y655LY-01M 0.001 100p TXRFIN 0.001 470p 0.001 to TX UNIT 0.001 2SK3475 LA-572 0.001 6.8nH 8.2nH Y655LY-02M L19 – L21 BL01RN1-A62-001 LA-562 1.5k Hi-Po: 12.9V 470p...
  • Page 65 AC IN CHASSIS UNIT POWER PS 0V PS 0V DC SUPPLY PS 15V M SW PS 0V EP10 ATC-20 PS 15V PS 15V PS 15V M SW PS 0V FCH30A03L TA78L08F PS 15V PS 0V PS 15V 2SJ533 0.001 0.001 0.01 0.001 0.001...
  • Page 67 S-13913MZ-C1 1-1-32, Kamiminami, Hirano-ku, Osaka 547-0003, Japan © 2003 Icom Inc.
  • Page 68 4. See the following image. Put transistor grease on bottom of shield where it contacts the chassis and put it in place. Solder the bottom shield onto the PA board. Note: Board is shown outside of repeater for clarity. Page 1 ©2008 Icom America Inc.
  • Page 69 11. Go to Maker Reserve Mode (specifically following the Maker Reserve Instructions on the B2B) and set the "On Mute Timer" to 0.000. Replacement is complete. Page 2 ©2008 Icom America Inc.

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