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Icom IC-UR8050, Service Manual

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SECTION 1

SPECIFICATIONS

1 - 1

All stated specifications are subject to change without notice or obligation.

M

GENERAL

• Frequency range

:

400–430 MHz

• Mode

:

FM (F3)

• Frequency Resolution

:

5 or 12.5 kHz (Selectable)

• Antenna impedance

:

50 

Ω

• Power supply requirement

:

DC 13.8 V ± 15 % (negative ground)

• Current drain (at 13.8 V DC)

:

• Usable temperature range

:

– 20 ˚C to + 60 ˚C (– 4 ˚F to + 140 ˚F)

• Frequency stability

:

± 2.5 ppm (– 20 ˚C to + 60 ˚C; – 4 ˚F to + 140 ˚F)

• Dimensions

:

425 (W) 

× 

149 (H) 

×

368 (D) mm; 16.7 (W) 

×

5.9 (H) 

×

14.5 (D) inch 

(Projections not included)

• Weight

:

12 kg (26.5 lb)

M

TRANSMITTER

• Output power

:

45 W (Typical)

• Modulation system

:

Variable reactance modulation and reference modulation

• Max. frequency deviation

:

2.5 kHz (Narrow)

5.0 kHz (Wide)

• Spurious emissions

:

less than – 70 dB

• Microphone impedance

:

600 

Ω

M

RECEIVER

• Receiving system

:

Double conversion superheterdyne

• Intermediate frequency

:

1st 30.875 MHz

2nd 455 kHz

• Sensitivity

:

less than 0.32 µV for 12 dB SINAD

• Squelch sensitivity

:

less than 0.32 µV

• Sprious and image rejection

:

more than 70 dB

• Audio output power

:

1.7 W at 10 % distortion with an 8 

Ω

load

• Audio output impedance

:

8 

Ω

Transmit

Receive

15 A
0.7 A
2.0 A

Standby
Max power

Summary of Contents for IC-UR8050

Page 1: ...SERVICE MANUAL UHF REPEATER iUR8050 ...

Page 2: ...ment model name and unit name 4 Quantity required SAMPLE ORDER 1130002390S IC µPD4049UBG IC UR8050 MAIN UNIT 5 pieces 8810008660Screw PH B0 M3x6 NI ZU IC UR8050 Top cover 10 pieces Addresses are provided on the inside back cover for your convenience REPAIR NOTES 1 Make sure a problem is internal before disassembling the repeater 2 DO NOT open the repeater until the repeater is disconnected from it...

Page 3: ...R CIRCUITS 2 2 2 3 PLL CIRCUITS 2 3 2 4 POWER SUPPLY CIRCUITS 2 4 2 5 PORT ALLOCATIONS 2 4 SECTION 3 ADJUSTMENT PROCEDURES 3 1 PREPARATION 3 1 3 2 PLL AND TRANSMITTER ADJUSTMENTS 3 2 3 3 ACC LEVELS REGULATOR OUTPUT AND RECEIVER ADJUSTMENTS 3 3 SECTION 4 PARTS LIST SECTION 5 BLOCK DIAGRAM SECTION 6 VOLTAGE DIAGRAM ...

Page 4: ... 5 D inch Projections not included Weight 12 kg 26 5 lb M TRANSMITTER Output power 45 W Typical Modulation system Variable reactance modulation and reference modulation Max frequency deviation 2 5 kHz Narrow 5 0 kHz Wide Spurious emissions less than 70 dB Microphone impedance 600 Ω M RECEIVER Receiving system Double conversion superheterdyne Intermediate frequency 1st 30 875 MHz 2nd 455 kHz Sensit...

Page 5: ... amplifier limiter amplifier noise amplifier and so on The local oscillator section and X1 gen erate 30 42 MHz for the 2nd LO signal The 2nd LO signal from the limiter amplifier IC5 pin 5 is applied to the quadrature detector section IC5 pin 11 and ceramic discriminator X2 to demodulate the 2nd IF signal into an AF signal The AF signal is output from pin 9 of IC5 2 1 4 SQUELCH CIRCUIT RF AND LOGIC...

Page 6: ...control circuit PA unit is applied to the YGR amplifier Q6 to stable RF output power 2 2 4 RF POWER AMPLIFIER CIRCUIT PA UNIT IC1 is a power module which provides a stable 45 W of out put power The amplified signal from the TX unit passes through the low pass filter C16 C17 L6 and is then applied to power amplifier IC1 The amplified signal is applied to the RF detector circuit D1 D2 and passes thr...

Page 7: ...plied to PLL IC IC3 pin 8 and the buffer amplifier Q6 The buffer amplified signal is applied to the mixer circuit IC6 pin 3 2 3 5 TRANSMITTER PLL CIRCUIT TX UNIT The PLL IC IC3 which includes in the prescaler the pro grammable counter and the phase comparator generates the 1st LO frequency with a Colpitts VCO D2 D3 Q2 The PLL IC sets the dividing ratio based on N data from the CPU LOGIC unit IC1 t...

Page 8: ...uit REG unit IC1 by the 5 V regulator cir cuit LOGIC unit IC9 The output voltage is applied to RESET circuit LOGIC unit Pin Port Description number name 3 4 5 29 30 31 32 45 46 47 48 49 54 55 56 57 58 P62 A18 P61 A17 P60 A16 P21 INTP0 P22 INTP1 P23 INTP2 C1 P24 INTP3 P74 AN4 P73 AN3 P72 AN2 P71 AN1 P70 AN0 P00 P01 P02 P03 P04 Outputs LOCAL INHIBIT LED control signal Outputs COR SIMURATE LED contro...

Page 9: ...RADE AND RANGE Output voltage 9 16 V DC Current capacity 20 A or more Measuring range 1 100 W Frequency range 300 600 MHz Impedance 50 Ω SWR Less than 1 2 1 Frequency range 0 1 600 MHz Frequency accuracy 1 ppm or better Sensitivity 100 mV or better Frequency range 30 600 MHz Measuring range 0 to 10 kHz Frequency range 300 3000 Hz Measuring range 1 500 mV EQUIPMENT Standard signal generator SSG Osc...

Page 10: ...ing Set an AG as 50 Hz 1 V Transmitting Connect an AG to MIC connector and set as 1 kHz 4 mV Transmitting LOCAL INHIBIT switch OFF Connect an SSG to the RX ANT connector and set as Level 1 mV 60 dBµ Deviation 3 kHz Modulation 1 kHz Receiving Set an SSG as Deviation 5 0 kHz 03 2 5 kHz 04 Receiving PLL LOCK VOLTAGE REFERENCE FREQUENCY OUTPUT POWER DEVIATION MAXIMUM MICROPHONE REPEATER TX RX Rear pan...

Page 11: ...tor connect point 1 2 MOD 3 GND 1 kHz 1 V P1 L3 PLL lock voltage adjustment for TX R43 R MOD Maximum deviation adjustment TX unit R16 Hi Output power adjustment PA unit RX unit L16 PLL lock voltage adjustment F Reference frequency check point LV PLL lock voltage check point R61 MIC Deviation adjustment MICROPHONE R47 MOD Deviation adjustment REPEATER LOGIC unit ...

Page 12: ...HIBIT switch ON Receiving freq 415 000 MHz Connect an SSG to the RX ANT connector and set as Level 3 2 µV 97 dBm Deviation 3 0 kHz 03 1 5 kHz 04 Modulation 1 kHz Receiving LOCAL INHIBIT switch ON Receiving freq 415 000 MHz Connect an SSG to the RX ANT connector and set as Level 0 32 µV 10 dBµ Modulation OFF Receiving LOCAL INHIBIT switch OFF R91 LOGIC unit Max CW Set an SSG as Level 0 22 µV 13 dBµ...

Page 13: ...stment VD H VD L R35 LO ACC output level adjustment R30 DO ACC output level adjustment R83 DI ACC output level adjustment R91 SQL Squelch level adjustment CP2 CP1 Regulator output voltage checkpoints LOGIC unit L1 L2 L4 L6 L7 L9 Sensitivity adjustment S Tune voltage check point RX unit ...

Page 14: ...050541 PCB B 5202A IC1 1140001480 S IC µPD78213GC AB8 IC2 1130004080 S IC µPD71055GB 3B4 IC4 1130004712 IC NM27C256Q150 IC5 1130004790 S IC TC74HC374AF IC6 1130004011 S IC TC74HC138AF IC7 1130004921 S IC TC74HC04AF TP1 IC8 1110001501 S IC S 80845ALUP EA9 T2 IC9 1180000970 S IC AN78L05M E1 IC10 1130002390 S IC µPD4049UBG IC11 1130002390 S IC µPD4049UBG IC12 1110000960 S IC NJM4558M T1 IC13 11100009...

Page 15: ... S RESISTOR ERJ3GEYJ 224 V 220 KΩ R66 7030003440 S RESISTOR ERJ3GEYJ 102 V 1 KΩ R67 7030003560 S RESISTOR ERJ3GEYJ 103 V 10 KΩ R68 7030003560 S RESISTOR ERJ3GEYJ 103 V 10 KΩ R69 7030003400 S RESISTOR ERJ3GEYJ 471 V 470 Ω R70 7030003560 S RESISTOR ERJ3GEYJ 103 V 10 KΩ R71 7030003560 S RESISTOR ERJ3GEYJ 103 V 10 KΩ R72 7030003520 S RESISTOR ERJ3GEYJ 472 V 4 7 KΩ R73 7030003720 S RESISTOR ERJ3GEYJ 22...

Page 16: ...006860 S CERAMIC C1608 JB 1H 102K T A C78 4030006890 S CERAMIC C1608 JF 1H 103Z T A C79 4030006890 S CERAMIC C1608 JF 1H 103Z T A C80 4030006890 S CERAMIC C1608 JF 1H 103Z T A C81 4030006850 S CERAMIC C1608 JB 1H 471K T A C82 4030007130 S CERAMIC C1608 CH 1H 101J T A C83 4030007130 S CERAMIC C1608 CH 1H 101J T A C84 4030006860 S CERAMIC C1608 JB 1H 102K T A C85 4030006850 S CERAMIC C1608 JB 1H 471...

Page 17: ...TOR ERJ3GEYJ 224 V 220 kΩ R56 7030003450 S RESISTOR ERJ3GEYJ 122 V 1 2 kΩ R57 7030003460 S RESISTOR ERJ3GEYJ 152 V 1 5 kΩ R58 7030003380 S RESISTOR ERJ3GEYJ 331 V 330 Ω R60 7030003650 S RESISTOR ERJ3GEYJ 563 V 56 kΩ R62 7030003530 S RESISTOR ERJ3GEYJ 562 V 5 6 kΩ R64 7030003650 S RESISTOR ERJ3GEYJ 563 V 56 kΩ R65 7030003450 S RESISTOR ERJ3GEYJ 122 V 1 2 kΩ R66 7030003290 S RESISTOR ERJ3GEYJ 560 V ...

Page 18: ...0006850 S CERAMIC C1608 JB 1H 471K T A C140 4030006850 S CERAMIC C1608 JB 1H 471K T A C141 4030007010 S CERAMIC C1608 CH 1H 100D T A C145 4030006900 S CERAMIC C1608 JB 1E 103K T A C146 4030006860 S CERAMIC C1608 JB 1H 102K T A C149 4030006850 S CERAMIC C1608 JB 1H 471K T A C150 4030006850 S CERAMIC C1608 JB 1H 471K T A C151 4030006850 S CERAMIC C1608 JB 1H 471K T A C153 4030006920 S CERAMIC C1608 ...

Page 19: ...T A C9 4510004640 S ELECTROLYTIC ECEV1CA470SP C10 4030006850 S CERAMIC C1608 JB 1H 471K T A C11 4030006850 S CERAMIC C1608 JB 1H 471K T A C13 4030006850 S CERAMIC C1608 JB 1H 471K T A C15 4030007000 S CERAMIC C1608 CH 1H 090D T A C17 4030007010 S CERAMIC C1608 CH 1H 100D T A C18 4030007060 S CERAMIC C1608 CH 1H 270J T A C19 4030009550 S CERAMIC C1608 CH 1H 2R5B T A C20 4030009510 S CERAMIC C1608 C...

Page 20: ...0036340 M OTHER FX2169 P01 P03PA EP1 0910050522 PCB B 5200B 4 7 REF ORDER DESCRIPTION NO NO PA UNIT IC1 1180001320 IC NJM7809FA D1 1790000700 DIODE DSA3A1 R1 7010004680 RESISTOR R2 7010004680 RESISTOR C1 4550002430 TANTALUM DN 1V R33M C2 4550000320 TANTALUM DN 1V 0R1M C3 4510004590 ELECTROLYTIC 16 MV 470 HC C4 4010006880 CERAMIC HE50SJ YB 102K 50V J1 6510003390 CONNECTOR B03B EH S J2 6510003420 CO...

Page 21: ...R SIMULATE V DET 13 8V D1 D16 MA6S121 S1 S12 MATRIX SW IC1 µPD78213 CPU 5V RESET IC7 TC74HC04 IC8 S 80845ALUP ROM PIO ADDRESS DECODER ADDRESS SELECT 9V S13 8V 5 V EXT interface OUT 9 REG 13 8V REG UNIT 13 8V NC BUSY S METER DI D0 STB D1 A2 D2 A1 D3 A0 DO E E E E TX EXT NOTE GROUNDING TERMINAL LOGIC UNIT LOCAL INHIBIT POWER SWITCH CDBC455X24 X2 IC12A MJM4558M IC2B MJM4558M IC13A MJM4558M IC13B MJM4...

Page 22: ...62 61 60 59 58 57 56 55 54 53 52 51 50 49 P50 A8 P47 AD7 P46 AD6 P45 AD5 P44 AD4 P43 AD3 P42 AD2 VSS P41 AD1 P40 AD0 ASTB P20 NMI P21 INTP0 P22 INTP1 P23 INTP2 C1 P24 INTP3 P71 AN1 P72 AN2 P73 AN3 P74 AN4 P75 AN5 AVREF AVSS VDD EA P33 SO SB1 P32 SCK P31 TXD P30 RXD P27 SI P26 I5 P25 I4A 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 IC1 µPD78213GC R105 1 k P0 5 R124 1 k X1 CR 505 R112 1 k A 7 R11...

Page 23: ... 2 k R13 2 7 k R12 100 C33 0 001 C22 0 001 R14 22 k L2 LA 252 C1 6 p C5 9 p 1 3 4 2 5 IC3 TA75S01F R11 820 k R10 10 k C24 10 R2 22 k D2 MA742 C7 1 p L3 LA 252 IC1 M68703LA C9 4 p 7 6 1 2 3 4 5 C12 10 R9 33 k C25 0 001 R8 47 k Q1 2SC4081 C26 0 001 R7 270 Q2 2SB1019 C13 470 p C15 10 R15 22 k R21 27 k C23 0 001 C2 5 p C18 470 p C9 10 C14 470 p L7 LA 239 TX ANT W4 TX UNIT J3 P1 TX UNIT J4 2 3 4 1 C28 ...

Page 24: ...C4 TA75S01F L13 10 µH Q9 2SA1586 R46 100 k R45 47 k C93 0 1 C92 0 1 R44 22 k C94 0 001 UNLOCK C77 82 p R39 560 R100 390 FI2 CFZM455E10 03 CFZM455G 04 C75 0 22 C76 0 22 C72 0 01 C73 33 p C74 39 p R81 560 k C81 82 p R34 6 8 k R33 1 5 k X1 CR 473 IC1 AN78L05M C88 10 C89 10 C145 0 01 C91 0 001 IC2 AN8003M R51 4 7 k R52 4 7 k Q11 2SC4117 C98 0 001 C99 0 001 R55 220 k R54 1 2 k C97 4 7 C23 0 75 p C31 0 ...

Page 25: ...5 454 7619 Glenwood Centre 150 6165 Highway 17 Delta B C V4K 5B8 Canada Phone 1 604 952 4266 Fax 1 604 952 0090 URL http www icomcanada com E mail info icomcanada com Unit 1 103 Garden Road Clayton VIC 3168 Australia Phone 61 03 9549 7500 Fax 61 03 9549 7505 URL http www icom net au E mail sales icom net au 146A Harris Road East Tamaki Auckland New Zealand Phone 64 09 274 4062 Fax 64 09 274 4708 U...

Page 26: ...6 9 16 Kamihigashi Hirano ku Osaka 547 0002 Japan A 5351M SU 1998 by Icom Inc ...

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