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Service Manual - R6 RU4 Montesecchieta

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5. PC Board View EDC165 Side A T103 T101 T102 5 qe CH or Qo e O O O es 0 R102 R103 Side B amp q Ob xr um o o TRE IG JK101 O O O O O R101 c 0 O Q D101 CAnode Adjustments 1 Required Test Equipment The following items are required to adjust radio parameters 1 Regulated power supply 2 Digital multimeter 3 Oscilloscope 4 Audio dummy load 5 88G 6 Power meter Audio volmeter 8 Audio generator 9 Distortion meter SINAD meter 10 Frequency counter Supply voltage Current Voltage range Current Input resistance Measurable frequency Impedance Dissipation Jack Output frequency Impedance Modulation Impedance Measuring range Sensitivity Output frequency Output impedance Measurable frequency Input level Distortion Measurable frequency Measurable stability Measurable frequency Measurable frequency 7 8 DC 3A or more FS Approx 20V 10A or more High impedance Audio frequency 8Q 1W or more 3 5mm 200MHz or more 50Q unbalanced FM Up to 200MHz 50Q unbalanced 0 1W 10W Up to 100kHz 1mV to 10V 67Hz to 10kHz 600
6. 55 OST SSJ 23 5 8 3 lt 5 uz E 9 os x e xe 9 9 9 OS 2 as 1 2 z 9 z 5 2 8 8 a JK101 D 5 R102 2 89 D101 T101 MVR3338S T102 Schematic Diagram EDC 165 CERAMIC FILTER DISCRIMINATOR FL103 450KHz x103 LPF ANT SW BPF RF AMP BPF 1st MIXER MCF IF AMP IF DETECTOR AF AMP ACTIVE FILTER HPF MUTE AUDIO AMP Q119 0197 Q118 F101 Q121 103 Q120 Q117 Q142 4 D112 HSC277 0120 3 3SK293 0115 3 3SK293 FL102 2805659 31136 22 HN2CO1FE SSM3J15FV NJM2070M 1 D113 HSC277 D119 1SV323 21 7MHz BUFFER BUFFER MUTE SMT SQL TONE LPF SW AUDIO Q114 289 10111 Q124 0 LM2902PWR Q128 HN2CO1FE VCO RX AFP v 112 0114 3 APC DET POWER AMP DRIVER PRI DRIVER BUFFERAMP 1scnoar Kt yp115 1sv323KH LOOP FILTER PLLIC TCXO D108 Q105 Q106 Q101 Q113 102 X102 RB717F RQA0002 RQA0004 2SC5066 15GNO3F VCO TX KO mios KE 2125mHz A Q108 D105 1SV323 ZN TA v 1senoar 1svs23 T TXDIRXD lt 710127 RB5218 30 APC AMP BUFFER STB MODULATION D A CONVERTER POTENTIOMETER CLK IC101 Q116 DATA LM2904PWM 2SC5066FT 0106 HSC277 9 ioi M62364FP CLK DATA IDC SPLATTER FILTER MIC MUTE 10 Q122 LM2902PWR RN1107MFV SD SW TX RX LED D121 SML521MUW q
7. 1290148 1 0 0 108120 T EDCI47 ACADAPTOR230V T E EUK 00149 _ AC ADAPTOR 230V UKPLUG EUK EBPO72 N MHBATTERYPACK EXPLODED VIEW ES0027 FG0479 FGO480 NK0081 ST0089 FP0324 AF0030 9 00006 FG0234Y AF0003 SD0111A PC Board View MAIN Side A RIS R130 C160 9
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11. RECEIVE 7 lt RECEIVE TRANSMIT lt O CPU CONTROL 0123 RN2111MFV K ROTARY ENCODER KEY INPUT JOE BACK LIGHT D123 SML310MT LAMP SW D124 SML310MT D125 SML310MT D126 SML310MT D128 SML310MT D129 SML310MT Q133 0138 RN1111MFV Q140 RN1111MFV LCD EEP ROM 109 1 ACTIVE FILTER LPF 10112 1 4 LM2902PWR TONE 67 250 3Hz DCS 023 754 ACTIVE FILTER LPF 10112 2 4 LM2902PWR PTTK PTT SW Q130 SPEAKER SPEAKER JACK MIC JACK CPU XTAL OSC CLOCK SHIFT X104 Q127 K 8 192MHz RN2111MFV 1C113 uPD78F0395GC 8EA A RESET 1C108 K S80845CLNB 5V REGULATOR 1C106 XC6202P502M BAT Q132 K 2SC6026MFV 05 SW PLL Q137 2SA1955FV E P5C Q139 SW RX HN2CO1FE Q135 RSV na 2SA1955FV RSC SW TX TSV Q136 4 2SA1955FV E T5C B MONI oo POWER oo BATTERY 7 2V Block Diagram DJ 175
12. E TFH EUK T E TFH 1005 1 16 1 01 OHMJ err de s 1005 1 16 1 0M OHMJ nn 1 16W 5 6K OHMJ 1005 1 16W 3 3K OHMJ 1005 1 16W 1 0M OHMJ 1005 T E EUK 1 16W 1 0M OHMJ 1005 1 16W 4 7K OHMJ 1005 x et pez IRK3550 1005 1 16W 10K OHM 1005 1 16W 1 0K OHMJ E TFH E EUK E EUK E EUK E EUK E EUK E EUK A a FH _E EUK FH E EUK rZ ER RUE EEE Ref No R276 R277 R278 R279 R280 R281 R282 R283 R284 R285 R286 R287 R288 R289 R290 R291 R292 R293 R294 R295 R299 R300 R301 R302 R303 R304 R305 R306 R307 R308 R309 R312 R313 R316 R317 R318 R319 R320 R321 R324 R327 R328 R329 R329 R330 R331 R333 R334 R335 R336 R337 R338 R339 R340 R341 R342 R343 Ref No R344 R345 R346 R347 R348 R349 R350 R351 R352 R353 R354 R355 R356 R357 R358 R359 R360 R361 R362 R363 R363 R363 R365 R366 R367 R368 R369 R370 R371 R372 R372 R373 R374 R375 R376 R377 R378 SW101 TH101 Parts No Parts name Version Of lt lt F E EUK FH IMACLH2GG H30AH1 025 H1 UK X102 X103 X104 ala m 3 m r Ref No R344 345 R346 34 348 R349 R350 R351 R352 6353 R354 R355 R356 5357 R358 R359 R360 R
13. LK10052R2K 8 0 124 1000779 CI608CBR47J 128 QC0773 C1608CBR47IJ L126 1000709 1608CBR220 LI27 1000795 1608100H J 126 a ESOS 129 QC0812 100510001 10 So o o 132 1000842 82518122 133 1000812 1005 1001 134 1000902 10201201801 135 1000875 0201268 136 1000875 0201268 137 1000875 10201206800 imo _ __ o _ Parts No Version mF 15GNO3F TL E 15GNO3F TL E 15GNO3F TL E XT0214 HN2C01FE GR T5L F 2SC6026MFV GR ls eee are ee eee XT0210 2SC6026MFV GR 2SA2070 TE12L F 2SA1955FV A TPL3 2SA1955FV A TPL3 XT0212 HN2C01FE GR T5L F SSM3J15FV TPL3 Z 1005 1 16W 4 7K OHMJ 1005 1 16W 1 0K OHMJ Br HER eS pas eee R BEE Ref No Q104 Q105 Q106 Q108 Q110 Q111 Q112 Q113 Q116 Q118 Q123 Q124 E EUK Q128 Q130 Q132 Q133 Q134 Q135 Q138 Q140 Q142 R101 R104 R105 R107 R108 R111 R112 R113 R114 R116 R117 R118 R119 R120 R121 R122 R123 R124 R126 R127 R128 R130 R131 R132 R133 R134 R135 Ref No 0104 0105 0106 0108 ano QUI 8112 0113 8116 0118 0123 0124 0128 0130 80132 0133 134 0135 0138 0140 0142 RIOT R104 RIO RIO RIOT RIO RIMIS 2 3 RI4 RIG RIT Rus 5119 RI20 2 22 23 R124
14. R134 giga m C176 3 RIS 1 pi see RBOB R30 fe o cse 358 1 01107 0 R374 7 La 5 5 i 1 3 id 2 MEME O i r214 de mm E P 8 SF sees C268 8 ra 72 5 8 Fog Raz 5 EE C361 as ode 8 5 E 6 4 2 R237 2294 eT o Resp 8 Bo b C308 C397 2 o 3 2 8 5 295 3 E amp Of R253 5 2 6 EH 14 C315 C316 0 R247 8 8 3 1 m 249 ese4 C317 6 5252 Res 6 3297 pi R265
15. and upper edges of the receiver s covering range Set the memory channels accordingly Input an RF signal from the SSG to the antenna connector then measure output signal at the speaker jack using a SINAD meter Press F FUNC key on the unit One of digits 00 FF should appear on the display where memory channel number was shown Rotate the dial on the unit to bring the SINAD value to 12dB or better a Lower edge Condition 1 2 b Center range Condition 1 2 a Upper edge Condition 1 Memory Channel 11 SSG setting Frequency 137 000M Hz RF Output Level 7 0dB u Modulation Frequency 1kHz Modulation Level 3 0kHz T E TFH 1 5KHz EUK Memory Channel 12 SSG setting Frequency 150 000M Hz RF Output Level 8 0dB u Modulation Frequency 1kHz Modulation Level 3 0kHz T E TFH 1 5KHz EUK Memory Channel 13 2 SSG setting Frequency 173 000MHz RF Output Level 8 0dB u Modulation Frequency 1kHz Modulation Level 3 0kHz T E TFH 1 5KHz EUK Necessary instruments 1 Audio volmeter Note Press FUNC key or leave next adjustment procedure 2 SSG 3 SINAD Meter 4 Audio dummy load the unit for 5 seconds to enter the new values and go to the Memory number should appear on the display when the unit exits the sensitivity adjustment 9 Squelch adjustments Select the memory channel number accordingly to adjust the level Min and Max In
16. 245g 8 70z with EBP 72 amp antenna 16 Buttons Keypad encode decode 39 tones encode decode 104 codes 5W High 2W Middle 0 5W Low Variable reactance frequency modulation 5KHz 2 5KHz 60dB or less Double conversion superheterodyne 1st 21 7MHz 2nd 450KHz 14dBy 0 2uV 6dB 12KHz or more 60dB 26KHz or less 6dB 6KHz or more 60dB 14KHz or less 500mW 80 MAX 400mW 80 10 THD Narrow FM models are available depending on areas of distribution CIRCUIT DESCRIPTION 1 Receiver System The receiver system is a double superheterodyne system with a 21 7MHz first IF and a 450kHz second IF 1 Front End 2 IF Circuit The received signal at frequency in the 136 173 995MHz E version 144 145 995MHz range is passed through the low pass filter L101 L102 L104 L118 C101 108 C109 C110 C117 C118 C119 C123 C124 C125 C126 C127 and C188 and tuning circuit C255 C256 C257 C258 D120 L138 and L139 and amplified by the RF amplifier Q119 The signal from Q119 is then passed through the tuning circuit C242 C243 C244 C245 C269 C270 C271 D117 D118 D119 L135 L136 and L137 and converted into 21 7MHz by the mixer Q118 The tuning circuit which consists of L139 L135 L136 varicaps D117 D118 D119 and D120 is controlled by the tracking voltage from the CPU so that it is optimized for the reception frequency The local signal from the VCO is passed through the buffer
17. Q115 and supplied to the source of the mixer Q118 The radio uses the lower side of the superheterodyne system The mixer mixes the received signal with the local signal to obtain the sum of and difference between them The crystal filter FL101 and FL102 selects 21 7MHz frequency from the results and eliminates the signal of the unwanted frequencies The first IF amplifier Q121 then amplifies the signal of the selected frequency 3 Demodulator Circuit After the signal is amplified by the first IF amplifier Q121 it is input to pin 16 of the demodulator IC IC 103 The second local signal of 21 25MHz shared with PLL IC reference oscillation which is oscillated by the TCXO X102 Then these two signals are mixed by the internal mixer in IC103 and the result is converted into the second IF signal with a frequency of 450kHz The second IF signal is output from pin 3 of IC103 to the ceramic filter FL103 where the unwanted frequency band of that signal is eliminated and the resulting signal is sent back to the IC 103 through pin 5 The second IF signal input via pin 5 is demodulated by the internal limiter amplifier and quadrature detection circuit in IC103 and output as an audio signal through pin 9 4 Audio Circuit The audio signal from pin 9 of IC103 is amplified by the AF amplifier Q120 The signal is then input to pin 16 of the electronic volume IC105 for volume adjustment and output from pin 14 The adjusted signal
18. R126 R27 R128 RISO RIS 92 93 R134 R135 o gt 1 i gt oi RK3552 1005 1 16W 15K OHM J RK3554 1005 1 16W 22K OHM J RK3537 1005 1 16W 820 OHM J 1 16W 4 7K OHMJ 1005 POS 1 16W 2 2K OHMJ 1005 We gt ee 1 rer 1 16W 1 0K OHMJ 1005 1005 1 16W 22 OHM J 1005 1 16W 1 0M OHMJ 1005 1 16W 1 0K OHMJ 1005 1 16W 1 0M OHMJ Ref No R136 R137 R138 R141 R142 R143 R144 R145 R146 R147 R148 R149 R151 R152 R153 R154 R155 R156 R157 R159 R160 R163 R164 R165 R167 R168 R171 R172 R174 R176 R177 R178 R179 R180 R181 R183 R184 R185 R186 R187 R188 R189 R190 R191 R192 R193 R194 R195 R198 R199 R200 R201 R202 R203 R204 R205 2 2 d d 2 2 2 lt lt aya rea a a aloe o ce a 2 ojo N co o Ref No R206 R206 R207 R207 R208 R209 R210 R211 R212 R213 R214 R215 R216 R217 R218 R219 R220 R221 R222 R223 R225 R225 R226 R227 R228 R229 R230 R231 R233 R234 R235 R237 R239 R240 R241 R242 R243 R244 R245 R246 R247 R248 R249 R250 R251 R252 R253 R254 R255 R256 R257 R258 R259 R260 R261 R262 R263 R265 R266 R267 R268 R269 R270 R271 R273 Version 1 100 1 1 ZU ZU ZU Zu ZU U ZU co NJN N N 6 O ju A o EUK T
19. oljojoj o joj o ojoJ o jo o o o o o o o o o o o o o o o o ol o o o o o o o o o o o O O Cd Cd c co Co CO co co co co e RIB o m In 2 Co o 2 O oo 3 S o n 10 o e o n 2 O 1 Ref No C305 C306 C307 C308 C310 C311 C312 C313 C314 C315 C316 e dere 2 2 E EUK T T E EUK C359 C360 C361 C362 C363 C364 C365 C366 C367 C368 C369 C370 Ref No C371 C372 Version a zo ooo oi o o T E EUK 2 Sere mae eee D107 XD0421 MSV323 TPH3H 18877 000453 9108 109 D110 00451 01582307601 1986 19111 D112 000422 15027718 2 9113 00422 5027718 7 0114 00421 15 3230173800
20. 2K50PT C193 CU3514 GRM36CH180J50PT 0194 CU3554 GRM36B104K10PT 0195 003535 GRM36B102K50PT 0196 OU3502 GRM36CK010C50PT 0197 1003527 GRMI552C1E221JD0ID 0198 003554 GRM36BIO4KIOPT 0199 003515 GRM36CH220J50PT 0200 CU3554 GRM36B104K10PT 0201 CU3535 GRM36B102K50PT 0202 CU3547 GRM36B103K16PT 0203 CU3535 GRM36B102K50PT 0204 CU3535 GRM36B102K50PT 0205 1050396 120 0106 J 0206 1050396 20 0106 0207 CU3547 GRM36BIOSKIGPT 0210 1009505 GRM36CH040C50PT C211 10019528 GRM1552C1E181JD01b 0212 10019528 GRM1552C1E271JD01b 0213 CU3526 GRMI552C1E181JD0ID CZE i C219 C227 C230 C231 C232 C233 C234 C235 C236 C237 C238 Ref No C239 C240 C241 C242 C243 C244 C245 C246 C247 C248 Version ee 4 0293 003554 GRM36B104K10PT 0294 CU3535 GRM36B102K50PT pos c ey 0296 1060469 11002100888 029 _ _ 0298 109535 GRM36B102K50PT 0299 1003137 GRMI88B3ICIOSKA92D 0300 OU3554 GRM36B104K10PT 0301 CU3535 GRM36B102K50PT C302 OE0462 1606100885 0303 CU3535 GRM36B102K50PT 0304 CU3554 GRM36B104K10PT E TFH UK Ref No 0239 C240 C241 0242 C243 0244 0245 0246 C247 C248 o oj
21. 361 5362 R363 R363 6363 R365 R366 R367 R368 R369 R370 37 R372 R372 R373 R374 R375 R376 R37 R378 swi01 1101 X102 X103 X104 7 _ p z 722 mam Ref No Parts No Partsname KZ0219 FRONTCASEASSYDJI 0081 KNOB 1530111 BATTERY TERMINAL SD0137 TERMINAL oo 15 0019 KNOBSPRING7800 1 1550112 CHASSIS 1510089 LCD HOLDER TL0033 REFLECTIVE SHEET TS0188 VCOCASE DJ175 UE0571 SMA ANT CONNECTOR JUR0027 ROTARY ENCODER 0045 LODTAPE CHARGER UNIT EDC 165 Ref No Parts No Partsname 0101 0125 MVR33388 Jo 01 UJO033 HEC2781 010520 R101 0027 SPR356OHM R102 RK3038 1608 1 10 1 0KOHM J Ria ____uposis 00165 INTEGRATED 7 _ PHP26 10FE BZN 1000017 BLIND SHEET KS0103 BOTTOM CASE EDC165 KUO162 UPPERCASEEDCI OA SPO020 CHARGE TERMINAL 1771002 IOXIMM S ACCESSORIES BBOO09Y HANDSTRAP DJS41 180011 X BELTCLUP DS0446 NTTOMODELPLATES EA0141 ANTENNA EA0141 T E EUK EA0142 ANTENNA EAO142
22. LL Loop Filter Circuit If a phase difference is found in the phase comparison between the reference frequency and VCO output frequency the charge pump output pin 5 of IC102 generates a pulse signal which is converted to DC voltage by the PLL loop filter and input to the varicap of the VCO unit for oscillation frequency control 5 VCO Circuit A Colpitts oscillation circuit driven by Q108 directly oscillates the desires frequency The frequency control voltage determined in the CPU IC113 and PLL circuit is input to the varicaps D105 and D107 This change the oscillation frequency which is amplified by the VCO buffer Q113 and output from the VCO unit 4 CPU and Peripheral Circuits 1 LCD Display Circuit The CPU turns ON the LCD via segment and common terminals with 1 4 the duty and 1 3 the bias at the frame frequency is 112 5Hz 2 Display Lamp Circuit When the LAMP key is pressed L is output form pin 67 of CPU IC113 to the bases of Q140 Q140 then turn ON and the LEDs D128 and D129 light 3 Reset and Backup When the power form the DC jack or external battery increases from Circuits OV to 2 5 or more H level reset signal is output form the reset IC 1C108 to pin 6 of the CPU IC 113 causing the CPU to reset The reset signal however waits at 100 and does not enter the CPU until the CPU clock X104 has stabilized 4 S Signal Meter Circuit The DC potential of pin 12 of IC103 is input to pin 83 o
23. Q unbalanced 1kHz Up to 40dB 1 100 Up to 200MHz Approx 0 lppm 11 Linear detector Measurable frequency Up to 200MHz 12 DC Ammeter Note Characteristics Flat CN 60dB or more Current 3A or more 1 SSG initial setting Modulation Frequency 1kHz Modulation Level 3 0kHz T E TFH 1 5kHz EUK 2 Reference sensitivity 12dB SINAD 3 Specified audio output level 500mW at 8Q 4 Standard audio output level 50mW at 8Q 5 Use an RF cable 3D2W 1M for test equipment 6 Attach a fuse to the RF test equipment 7 All SSG outputs are indicated by EMF 8 Supply voltage for the transceiver 7 2VDC 2 Adjustment mode The adjustment should be operated in the Adjustment mode Therefore except for the reference frequency deviation and tone deviation adjustments an operator won t touch the components on the board but most of the adjustments should be done by operating the dial and keys on the unit During such operation memory channels are used temporary therefore it is required to program memories before the unit 1s set to the adjustment mod Please refer the chart below for the programming channels The frequencies may be varied within the range of 0 2Mhz depending on the RF environment around your work area and refer the instruction manual for how to program the memories into the memory channels To enter the adjustment mode press F then KL to key lock the unit Then press the numeric keys i
24. Service Manual DJ 175 www r6 ru4montesecchieta it Specifications izbccv Circuit Description Parts List Exploded View PC Board View Adjustment Schematic Diagram Block Diagram ALINCO INC SPECIFICATIONS DJ 175 lt GRNERAL gt Frequency range Modulation Channel steps Memory channels Antenna impedance Frequency stability Microphone impedance Power supply Current drain Approx Temperature range Ground Dimension Weight DTMF Subaudible Tone CTCSS Digital Code SQ DCS lt TRANSMITTER gt Output power Approx Modulation Max deviation Spurious emission lt RECEIVER gt Receive system Intermediate frequencies Sensitivity 12dB SINAD Selectivity Audio output power T TX 144 147 995MHz RX 136 173 995MHz E TX 144 145 995MHz RX 144 145 995MHz TFH TX136 173 995MHz 150 173 995MHz RX 136 173 995MHz 150 173 995MHz Guaranteed range per specifications 144 147 995MHz 144 147 995MHz 144 145 995MHz 144 145 995MHz F3E FM F2D T E models only 5 10 12 5 20 25 amp 30KHz 200 channels 1 CALL channel 1 Repeater Access function memory 50 unbalanced 2 5ppm 2k ohm nominal 7 2V 7 4V Battery only 1 5A Transmit high at 5W 250mA Receive at 500mW 70mA Stand by 30mA Battery save on 10 45 C 14 113 F Negative ground 58 W x 107 5 H x 36 3 D mm 2 28 W x 4 23 H x 1 43 D inches Approx
25. als s ON ON Na 58 Via 810 on 2 g OJ3HN N I 5 os ON ON al FIT RIO 0 04 Occ 8 vila a S 8 u ACC 2 5 44 gs HR i 35 5 sila ES y i 3 09 0 ss 9 SR ER at 5 8004 Smo AE ze 8 Bog Occ AZZ 89 se 2 69 1968 3 8 9 S X 8 O o 2 ZB tute did S 8 8 NS 3 Wi 58 SOO pieg 9928 z og HR FR 8 N MSS 9 i 0 ae eau 2 LH 28 zu L 0 FT s HH 9 2 8508 of oz L00 0 3 8 Ol RELE 6810 o5 E HE an EE k Sal ON 0 eal g 0 0 0 s OW ren Cell oo 99 gz gt SUA O 040 HR 279 2 019S 09d 58 Inox Z oS 91 1000 NS T ant 13834 3 TTO oo 2 8 LOLO 0619 ld a z ER uoo O00 ve 89 cau g 10070 6211 0 eld 19 7 0910 HHA sae EEA sf T 4 dg 00L ip lt 99 138 So 5 Ss lveco ss 981 est 8 a 9 HR Os 29 ds ze sz 9 ae j 58 S nke 3 IN X TE 8 5 de 0 oor 2 77 Vero 6025 1618 coza S 2003 r AEE Ar 5 ENOO ce 54 uoo 06 9 zozy Hr os gt ioli 00 me 000 Ss 7 2220 ers 65 dx 18 ST TE zoas 000 28 es 62 89 535 e ROO tz ME 3 TWOO iz YS 1038 12 938 1 628 os gt 2
26. ease the PTT to finish the adjustment Be sure to check the consuming current value after the adjustment is completed Specification TX output power High 5 0 watts Current consumption 1 6A or less Necessary instrument 1 DC Ammeter 2 Power meter 3 TX output Middle power Select memory ch 3 Press PTT on the unit to transmit One of digits 00 FF should appear on the display where memory channel number was shown Rotate the dial on the unit to adjust the TX power to meet the specification Release the PTT to finish the adjustment Specification 2 0 watts Necessary instrument 1 Power meter 4 TX output Low power Select memory ch 4 Press PTT on the unit to transmit One of digits 0 F should appear on the display where memory channel number was shown Rotate the dial on the unit to adjust the TX power to meet the specification Release the PTT to finish the adjustment Specification 0 5 watts Necessary instrument 1 Power meter 5 Microphone deviation Select memory ch 5 Input the signal as specified below from an Audio generator and transmit Measure the deviation value using a Liner detector Press PTT on the unit to transmit One of digits 00 FF should appear on the display where memory channel number was shown Rotate the dial on the unit to adjust the deviation to meet the specification Release the PTT to finish the adjustment Specification 4 3 0 1kHz T E TFH 2 2 0 1kHz EUK Measuri
27. en ie 1SV323 TPH3 H 1SV323 TPH3 H C375 C376 C377 C379 C380 C381 C382 2 D101 Ref No 0371 372 0375 0376 377 0379 C380 C381 C382 pioi 0106 D118 D119 D120 D121 D122 D123 D124 D125 D126 D127 D128 D129 r d o Ref No Parts No Parts name D130 00418 RBS21S 30TEG 10101 1109 LM29004PWa 10102 XA1107 MBISEO7SRPFTGBNDEFE C103 80404 TASMI36FNG ED C104 80210 ONJM2070M IC105 XA1293 62364 8 10109 119 06202850298 10108 1120 S80845CLNB B66 T2G 10109 XAT 17 S24CS64A01 J8TIG 10110 106 LM2902PWR 10111 1106 LM2902PWR 10112 81106 LM2902PWR 01 1010019 HSJI493 01 010 102 110022 HSJ1102 01 540 10 105401556 1046 155 611 2 05402006 040 20 8TL 104 QS402000 040 20 8TL 105 105401405 040 14 5TL 106 105501403 05071491 108 1000812 10051000 109 LJ o o o 4d 110 1000757 C1608CB22NJ i a i i 112 1054020587 04020571 113 1000875 C2012H68NH 114 1000902 020120180 115 QC0812 10051000 116 1000736 005282 8 117 080057 8 216085 0 118 QS402057 040 205 7T5L 120 080057 MPZI608SIOAT LI21 1000818 C2012H82NH 128 1000736
28. f the CPU IC113 converted from an analog to a digital signal and displayed as the S meter signal on the LCD 5 DTMF Encoder The CPU IC113 is equipped with an internal DTMF encoder The DTMF signal is output from pin 71 through IC112 Low pass filter and then through the microphone amplifier IC110 and is sent to the varicap of the VCO for modulation At the same time the monitoring tone passes through the AF circuit and is output form the speaker 6 TONE Encoder The CPU IC113 is equipped with an internal tone encoder The tone signal 67 0 to 250 3Hz is output from pin 70 of the CPU to the 21 25MHz reference oscillation X102 of the PLL reference oscillator 7 DCS Encoder The CPU IC113 is equipped with an internal DCS code encoder The code 023 to 754 is output from pin 70 of the CPU to the 21 25MHz reference oscillation X102 of the PLL reference oscillator 8 CTCSS DCS Decoder The voice band of the AF output signal from pin 9 of 103 is cut by sharp active filter 111 and amplified then led to pin 80 of CPU The input signal is compared with the programmed tone frequency code in the CPU The squelch will open when they match 9 Clock Shift In the unlikely event that CPU clock noise is present on a particular operating frequency programmed into the radio you can shift the CPU clock frequency to avoid the CPU clock noise The output signal from pin 8 of the CPU turns on Q127 Then the oscillation frequenc
29. harmonic waves are reduced as needed and the resulting signal is supplied to the antenna 3 APC Circuit Part of the transmission power from the low pass filter is detected by D108 converted to DC and then amplified by a amplifier IC101 The output voltage controls the bias voltage from the source of Q105 and Q106 to maintain the transmission power constant 3 PLL Synthesizer System 1 PLL The dividing ratio is obtained by sending data from the CPU IC113 to pin 10 and sending clock pulse to pin 9 of the PLL IC 1C101 The oscillated signal from the VCO is amplified by the buffer Q116 and input to pin 8 of IC102 Each programmable divider in 102 divides the frequency of the input signal by N according to the frequency data to generate a comparison frequency of 5 or 6 25kHz 2 Reference Frequency Circuit The reference frequency appropriate for the channel steps is obtained by dividing the 21 25MHz reference oscillation X102 by 4250 or 3400 according to the data from the CPU IC113 When the resulting frequency is 5kHz channel steps of 5 10 15 20 and 30kHz are used When it is 6 25kHz channel steps of 12 5 25 and 50kHz are used 3 Phase Comparator Circuit The PLL 1C102 uses the reference frequency 5 or 6 25kHz The phase comparator in the IC102 compares the phase of the frequency from the VCO with that of the comparison frequency 5 or 6 25kHz which is obtained by the internal divider in IC102 4 P
30. ie ON 38 S Fla ty 2 5 EN NO 8222 086 162 OST x 7 AC OILY z N i S S amm diem 9 ps mes 200 08 2865 E 538 1819 xg 9020 ozz HR zoey se u pr em back dt 255 5 ne x 129 2 g lou We 8315 Veto o S 3 5 5 5 B o 099 2 FZI T T 7 tot a H c Ox o ne E ex 906 OE IS Sl x x x x 5 zs SES l i i z 1000 z LX gt 5 8 9000 ISEO KE el xl 58 6 FLERE E VES s 7 sle SEERE 01 8 z gt ES 019 oo o 3 SI ol o 5 ry 58 3 Savi F 5 ral SAVIN 7 z ele es 0 9089 HEBE 9 2196 Ez Bol E Bal x So HR SSH 8 LZ 8 o o ag x af 001 022 8 5 98 E HE Nols RS sotto 7 Oe 2288 2 2 Sra EN all lolz E gt eve 8 T Loo 9 FR 5 ga 923 ON ON ael L00 0 5 ezeo 1819 m ON i slo s SE 0 1869 amp 2 z z Es iris e 2 2 ss z daa le Sala 6 SS 21 E as 8 SS a S oz AN So 8 X001 BS R of 5 se u WS E m ae vi gt lt 20000 A vov Z s ASh NO xa eseo 0 i 52
31. is sent to the audio power amplifier IC 104 through pin 2 to drive the speaker 5 Squelch Circuit The signal except for the noise component in AF signal of IC103 is cut by the active filter inside IC The noise component is amplified and rectified then converted to the DC voltage to output from pin 14 of IC103 The voltage is led to pin 2 of CPU and compared with the setting voltage The squelch will open if the input voltage is lower than the setting voltage 2 Transmitter System 1 Modulator Circuit The audio signal is converted to an electric signal in either the internal or external microphone and input to the microphone amplifier IC110 0 consists of two operational amplifiers one amplifier pins 12 13 and 14 is composed of pre emphasis and IDC circuits and the other pins 5 6 7 8 9 and 10 is composed of a splatter filter The maximum frequency deviation is obtained by IC105 and input to the cathode of the varicap of the VCO to change the electric capacity in the oscillation circuit This produces the frequency modulation 2 Power Amplifier Circuit The transmitted signal is oscillated by the VCO amplified by the pre drive amplifier Q101 and drive amplifier Q106 and input to the final amplifier Q105 The signal is then amplified by the final amplifier Q105 and led to the antenna switch D101 and low pass filter L104 L102 L101 C119 C118 C117 C127 C126 C125 C124 C108 and C101 where un wanted high
32. n order of 4 9 0 2 1 ang 7 Observe that decimal points appear on the display below 100MHz and 10MHz digits To exit from the adjustment mode repeat the whole sequence key lock then enter the code in order NEVER RESET THE UNIT WHILE OPERATING IN THE SET MODE This may reset whole adjustment values resulting the malfunction of the unit in the operating mode The chart below shows the adjustment points and interface between the unit and instruments Please use an attenuator in case the specifications of the linear detector and frequency counter may exceed the requirement herein Simply memory the frequencies only into the relative memory channels Channe 0 0 TFH 1 Frequnecy Adjustment 145 000 162 000 6 CTCSS tone deviation 145 000 162 000 1 Frequency adjustment Select memory ch 1 Press PTT on the unit to transmit and measure the TX frequency One of digits 00 FF should appear on the display where memory channel number was shown Rotate the dial on the unit to adjust the frequency to bring the value to the range specified below Specification value 50Hz Necessary instrument 1 Frequency counter 2 TX output High power Select memory ch 2 Press PTT on the unit to transmit One of digits 00 FF should appear on the display where memory channel number was shown Rotate the dial on the unit to adjust the TX power to meet the specification Rel
33. ng condition 1 Audio generator setting Frequency 1kHz Output Level 50mV Necessary instrument 1 Audio generator 2 Linear detector 6 CTCSS tone 88 5Hz deviation and adjustment of the sign wave Select memory ch 6 Press PTT to automatically transmit 88 5Hz tone Measure the deviation value using a Liner detector Press PTT on the unit to transmit One of digits 00 FF should appear on the display where memory channel number was shown Rotate the dial on the unit to adjust the tone deviation to meet the specification below Use an oscilloscope to monitor the sign wave then correct the wave shape see the chart 1 below Specification 0 80 0 05KHz T E ae PUN 0 90 0 05KHz TFH Ni NUN 0 50 0 05KHz EUK Necessary instrument 1 Linear detector NG 7 2 Oscilloscope Chart 1 sign wave correction 7 DCS 255 deviation Select memory ch 7 Press PTT to automatically transmit DCS code of 255 Measure the deviation value using a Liner detector Press PTT on the unit to transmit One of digits 00 FF should appear on the display where memory channel number was shown Rotate the dial on the unit to adjust the tone deviation to meet the specification below Specification 0 80 0 05KHz T E TFH 0 50 0 05KHz EUK Necessary instrument 1 Linear detector 8 Receiver sensitivity adjustment Preparation Set the speaker audio output level to 50mW Operation There are three points to be adjusted the lower central
34. put an RF signal to the antenna connector from SSG then press FUNC key on the unit A beep pip sounds and completes the adjustment a Squelch level Min Condition 1 Memory Channel 14 2 SSG setting Frequency 145 000MHz T E EUK 162 000MHz TFH RF Output Level 11dB u Modulation Frequency 1kHz Modulation Level 3 0kHz T E TFH 1 5KHz EUK b Squelch level Max Condition 1 Memory Channel 15 2 SSG setting Frequency 145 000MHz T E EUK 162 000MHz TFH RF Output Level 0dB u Modulation Frequency 1kHz Modulation Level 3 0kHz T E TFH 1 5KHz EUR Necessary instrument 1 SSG 10 S meter adjustments Select the memory channel number accordingly to adjust the S meter level 1 and full Input an RF signal to the antenna connector from SSG then press FUNC key on the unit A beep pip sounds and completes the adjustment a S meter level 1 Condition 1 Memory Channel 16 2 SSG setting Frequency 145 000MHz T E EUK 162 000MHz TFH RF Output Level 5dB u Modulation Frequency 1kHz Modulation Level 3 0kHz T E TFH 1 5KHz EUK b S meter level Full Condition 1 Memory Channel 17 2 SSG setting Frequency 145 000MHz T E EUK 162 000MHz TFH RF Output Level 15dB Modulation Frequency 1kHz Modulation Level 3 0kHz T E TFH 1 5KHz EUR Necessary instrument 1 SSG
35. y of X104 will be shifted about 200 ppm Parts List MAIN UNIT Ref No Parts No Parts name Version C101 C102 C103 C104 E gt pO T E EUK NI HE raz dne 777 05 GRM36B102K50PT i a CU3535 GRM36B102K50PT CU3535 003535 GRM36B102K50PT BED C108 C109 C110 C111 C112 C113 C160 C163 C164 C165 C166 C167 C168 C169 C171 C172 OJO O OJ O OJ OJOJO OJO N N nS 9 N N N N o olan Ref No cio C102 C103 C104 C108 C109 6110 C1 0112 6113 C160 0163 C164 0165 0166 C167 C168 0169 on C172 Ref No Parts No Patsname 0176 CU3502 GRM36CK010C50PT 0117 109595 GRM36BIO2KSOPT 0178 CU3513 GRM36CH150J50PT 0179 CU3535 GRM36B102K50PT C180 CU3515 GRM36CH220J50PT c181 OUO119 GRM21BB30J106KE18L 0182 CU3554 GRM36BIO4KIOPT 0183 CU3535 GRM36B102K50PT 0184 CU3547 GRM36BIOSKIGPT 0185 CU3535 GRM36BIO2KSOPT 01 LJ NEM 0187 CU3513 GRM36CH150J50PT 0188 CU3508 1000CH50V7PFD 0189 CU3535 GRM36B102K50PT 0191 OU3137 GRMI88B31C105KA92D 0192 CU3535 GRM36B10

Service Manual - R6 RU4 Montesecchieta

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