VX-261 - Earl & Brown
Contents
1. VW L L C1257 R1151 T e m aN mX Tado oN 12p CH A r A 05 7 PILA nus Sve SS Ee Y RAN R1232 cp1001 x AY sc o x z325 Det WOT ASF AS 20 EE xXF1001 22 JTBMUSOCX2U A ae g oTe O aa te ce Joy of To C1247 MFT50 85P R1178 C1271 R1185 C1297 NS Es s Og D e 0 01 B25V 470 1 39p CH 47K 1 0 01 25VB a D mM HY A MW T E Kl i we e T aX An la las 09 as R1170 Di x ao st FLA Lef A c1209 C1208 C1225 E2. 136 1 74MHz RX5V RX5V RX5V GEN AXSV AXSV a e S RF_AMP MCF IF_AMP ANT_SW BPF JTBM450 BFS505 MFT50 85 25SC5226A RN142S E FM SYSTEM IC 28 1ST MIXER 50 8SMHz L oer 3SK293 AA32U4 16 TUNE TUNE gt DISC AXSV 186 85 224 BSMHz 1SV325 1SV325 50 4 MHz P AVR E CPU 2SC4617 DA221 NSG P DRIV 2SK3077 CF N W N SW LTMUSOG Ra E W N SW W N SW DTC 144 VCO_BV 186 85 224 85MHz DAN222 DAN222 CF W TRX SW BUFF AMP BUFF AMP RX VCO TUN LTMYSOG DAN222 2505010 2505010 1SV325 W N SW cru SEN DTC 14UEE WH BUFF SW oe es CUR DET DTC 1U4EE TRIPLER Sj NUM12904 Ee 16 8Mx3 La d 136 1 74MHz cca eaves APC SW TX OSC TX EER d VCO TUN DTC 14UEE 2SC4227 1SV325 cP TX5V DAC FS Bu Txo eg VCO_MOD PLL CPU A CPU bo AK 154 1 E ste TX_VCO CP DTC144EE Os IH lt 800
3. Block Diagram
4. Modulation Max DeviW Max Dev N Freq MHz 154 05000 4 Help Frequency DK Cancel m Sub Audio CTC Dev lW CTC Dev N DCS Dev W DCS Dev N p ME ex tone 14 Cloning The VX 261 transceiver includes a convenient Cloning feature which allows the programming data from one transceiver to be transferred to another VX 261 Here is the procedure for Cloning one transceiver s data to another l Ze VX 261 VHF FM Transceiver Service Manual Turn both transceivers off Remove the plastic cap and its two mounting screws from the MIC SP jack on the right side of the trans ceiver Do this for both transceivers Connect the optional CT 27 cloning cable between the MIC SP jacks of the two transceivers Press and hold in the PTT and SIDE 1 switches just below the PTT switch while turning the transceiver on the order of the switch on operation does not matter When Clone mode is successfully activated in this step On the Destination transceiver press the SIDE 1 switch The LED indicator on the top of the transceiv er will glow Green 6 Press the PTT switch on the Source transceiver The LED indicator on the top of the transceiver will glow Red and the data will be transferred If there is a problem during the cloning process the LED indicator on the top of the transceiver will blink Red check your cable con
5. e Vertex Standard l Vertex Standard LMR Inc VHF FM Transceiver 2015 Vertex Standard LMR Inc VX 2 6 1 EC128N90A Service Manual Introduction This manual provides the technical information necessary for servicing the VX 261 VHF FM Transceiver Servicing this equipment requires expertise in handing surface mount chip components At tempts by non qualified persons to service this equipment may result in permanent damage not covered by the warranty and may be illegal in some countries an E A eee Deng LH A AA N Two PCB layout diagrams are provided for each double sided board in this transceiver Each side of the board is referred to by the type of the majority of components installed on that side Side A or Side B In most cases one side has only chip components surface mount devices and the other has either a mixture of both chip and leaded components trimmers coils electrolytic capacitors ICs etc or leaded components only As described in the pages to follow the advanced microprocessor design of the VX 261 Trans ceiver allows a complete alignment of this transceiver to be performed without opening the case of the radio all adjustments can be performed from the front panel using the Alignment Mode menu While we believe the information in this manual to be correct Vertex Standard assumes no li ability for damage that
6. 50 Ohm unbalance 2 3 x 4 3 x 1 3 inches 58 4 x 109 x 32 3 mm with FNB V133LI UNI 2 3 x 4 3 x 1 6 inches 58 4 x 109 x 39 9 mm with FNB V134LI UND 9 9 oz 281 g with FNB V133LI UNI Antenna Belt Clip 11 6 oz 330 g with FNB V134LI UNI Antenna Belt Clip Receiver Measured by TIA EIA 603 Circuit Type Sensitivity 12 dB SINAD Adjacent Channel Selectivity Hum and Noise Intermodulation Spurious Image Rejection Conducted Spurious Audio output Double Conversion Super heterodyne 0 25 uV 65 60 dB W N 40 dB 65 dB 70 dB 57 dBm 700 mW intemal 16 Ohm 5 THD 500 mW extemal 4 Ohm 5 THD Transmitter Measured by TIA EIA 603 Output Power Modulation Maximum Deviation Conducted Spurious Emissions FM Hum amp Noise Audio Distortion 5 1W 16K0F3E 11KOF3E 5 0 kHz 2 5 kHz 70 dB below carrier 40 dB lt 5 1 kHz Specifications subject to change without notice or obligation VX 261 VHF FM Transceiver Service Manual Exploded View amp Miscellaneous Parts e CB6642000 H MIC SP CAP ASSY n CB6987000 FRONT CASE ASSY RA1612700 KNOB VOL RA1612800 KNOB FREQ RA125020A SHIELD CASE COVER FET CB6992000 t MAIN UNIT ASSY I RA157250A x 2 pcs a RING NUT EE RUBBER BOOTS RA037690B SHEET 6x6 lt FRONT CASE ASSY Component FRONT CASE NON KEY NAME PLATE MODEL LABEL VX 261 RUBBER
7. 3 5V SwW 8 5v TX5V B BUFF AMP BATTHO i TX5V_SW 2SC50 10 RTM002P SES DATT CPU Laag BATT_TYP TAN CPU DTC 144 TXC CPU RSF 10 0LHDFB il GE ASWO PO_OFF PO_OFF ATMO02P ASW1 vox vox 3 5V e 5v DAC CPU AK2330 RSW2 CD FILT Les cD_sw O Gut pr CPU e AST S RXC INTETT DVDD AVDD RSW3 DEc_c Le DEC_c CHO UNE Set gt 3 5V SAVE3 5V in ax tune bor gt CHO TUNE ECS nsa Le NSQ Y CH1 TXPO TIN ate ow bur ie S Saray DI ASSI Le I P ER F E SI RSS cru Sy ON SAVES N MIC CHU CTCSS_DEV KEY 1 CPU MIC CH2 GAIN CH5 MOD_BAL EEPROM TARSS35U DTA 144EE D A DTMF_ENC GAIN i IC GAIN DU CH6 MAX_DEV S SCK uL La uL GE BRQ3G86 sal CH3 gt DTMF IN DTMF DU DE Jl SDO AF MUTE 5 AF MUTE KEY1 chu SCK amp i IN Cap but Wy KEY2 LG KEY2 SDO 5 gt CPU SA CH5 gt MOD Q WW 7 E KEY2 IN MOD BaL pu BA KEY1 Ls KEY1 DACS e CPU_3 SV sees Mie LIMIT D gt geng E b E ET IN MAX DEV DU E BATT_TYP BATT_TYP CH7 FREQ TW TEMP i IN FREQ bor gt D STB D STB ARRE e CPU SDO ERSAM S MIC_MU e C_MUTE NJM12902 a NJM12902 SS FILTER LE CPU SCK 7 FLAT_AF LS FLAT_SW NUM12902 Ll 3 CPU Der gt CLN_TX SAVE i SAVE e Es ENO CLONE amp CLN_RX DEC H Le DEC H 2 50 ACONT ACONT ED_G SW FLS 1615055GR WH LES W N TC7S66FU oe DTC 144 lt a See et He ED_A MPS gt IMPS FLAT_AF l l DAC ED_G Axc Ls PXC A MIC_GAIN 26 TN Lea TXC SV CPU So MIC_MUTE E DEE E Dm XTAL2 Txvco y TXVcO ENT 11 0592MH
8. EMF daBul PD uV EMF uV PD dBm alignment If the power supply is turned off during alignment the alignment data will be corrupted When perform the RX Tune and SQL alignment the RF level shows this unit according to this set ting SP LOAD Switch LOAD LOAD Switch 169 UY UU 50 ohm Dummy Load RF Signal Generator Se T 16 SP OUT B Sampling e MI P Inline A LO Transceiver VC FRB 6 AF Signal Ho ener D Sub 15 pin MICIN Generator Wattmeter Connector SINAD Meter Battery Terminal CLONE Port lt CT 104A CT 106 or CT 171 Computer FIF 12 CE150 Power Supply Deviation 7 5 VDC Meter Frequency Oscilloscope Counter H VX 261 VHF FM Transceiver Service Manual 9 1 PLL Reference Frequenc Frequenc This parameter align the reference frequency for PLL l Press the Frequency button to open the Frequency Align ment window Click the PTT button to transmit the radio on the center fre quency channel Set the value to get the desired frequency according to the following ways e Dragging the slide bar e Clicking the arrow buttons e Pressing the left right arrow key of the computer s key board e Entering the value 000 255 in the Data box from the computer s keyboard
9. Therefore if a fault is suspected contact the dealer from whom the transceiver was purchased for instructions regarding repair Authorized Vertex Standard service technicians realign all circuits and make complete performance checks to ensure compliance with factory specifications after replacing any faulty components Those who do undertake any of the following alignments are cautioned to proceed at their own risk Problems caused by unauthorized attempts at realignment are not covered by the warranty policy Also Vertex Standard reserves the right to change circuits and alignment pro cedures in the interest of improved performance without notifying owners Under no circumstances should any alignment be attempt ed unless the normal function and operation of the trans ceiver are clearly understood the cause of the malfunction has been clearly pinpointed and any faulty components replaced and realignment determined to be absolutely necessary The following test equipment and thorough familiarity with its correct use is necessary for complete realign ment Correction of problems caused by misalignment resulting from use of improper test equipment is not covered under the warranty policy While most steps do not require all of the equipment listed the interactions of some adjustments may require that more complex adjust ments be performed afterwards Do not attempt to perform only a single step unless it is clearly isolated electr
10. a D a Gg aM no aS ol a 05 TP1014 Del E PER Ro CO A 2 a ES T ox Ht al Si i Ma STE D Mem SY EOL SS 337 Gen 3 25 gx 35 R T WW De ow deem A o e C1327 _CF1002 C1348 Z ax ah a T oz Ze IR gt 3s Sak 5 2 Ox 2 oN C1253 priva TS DZ On Hai 627 rm soEn A e X KE Oo a off He o ON ox A z Sx Tak a AT I Gre ma n5 m o or AT 0 0018 27K 14 Q1029 C1261 s gt D1021 H 10V 10 A Sa ks aa olmo ra o un Olmo ro Sav Ss le sre MG nU CPH3910 12p CH gt 18V325 DS D1032 e It 1H Ny SE 77 ze m ER ME te sos maS SN on y sor ee aR TA 4 Da SE at ae as ox Tae Sa P gr NE Tors a S og aiea T of oN R1306 C1259 L1037 C1277 D1022 X aX a aioa S 0 092 Ge a fos Q 0 1p CK L0022945 150pcH 18V325 e Rb M DTC 144EE 143 Os DTC114TE on dvs 4 o SW uo S 2 77 Mie e wr D 7 H 7 H n Zo aa 19 D i T i T RR HE Liss Q1026 nad at RE a Ig may To ch E aes ul gt XN a T A o lr gt PON gt mo ox DO Ll m al A TP1003 SR TP1006 of 0 a LS Lo 3 a9 ese 2 ame go Ae Be Ze Del Ek Roy alc id 8 E A a h Ei q aes HS Soy Sey SE Roa Ry 25 m na jo on oN 3 Do U an 30 AL o8 aa e e P1007 ax ON TaT oN n g gal 49 Si An o e E 4 m a 8 01003 Z A ag ier Dn Sty bald ES MoTAx aa mE a gt o of 05 x RTM002P02 a TP1019 mol os os fae E Dox HE Ka T Jo 5v oli Ll Jelili ga e Jx 77 q q foo S i PA ES l x Sots Sp otot on o ox v Di A Ta A ef Aq Eine ER 0 7T r e 77 T o7 1 oR On oA a oO og O a alt D 2x Al o o Du 0
11. A 235 as A x puie d ae 13s NJM12902V TN S ys TXC m a HPF T E On cos 33 a 45 o r ma o ao HI A ys De Man pale 4 mol OS E BEEP AF ADDER w o gt E b 5 L Biel 3 E SA Es opa sch u pes Zz bk val H 1 a 1 e lt x O 1 o O O u 77 a CO 0j J O X W a x Wl Ui gt a Ww u Ki U gt C O gt FJ O pe un Z lt lt VX 261 VHF FM Transceiver Service Manual e Vertex Standard No portion of this manual may be reproduced without the per mission of Vertex Standard LMR Inc Vertex Standard is a trademark of Vertex Standard LMR Inc All other trademarks are the property of their respective owners 2015 Vertex Standard LMR Inc All rights reserved
12. Radio menu tab of Note when all items are aligned it is strongly recom CE150 mended to align according to following order The detail information is written in the help document of CE150 PC Programming Software File Edit Yiew Common Signaling Radio Channel Help Cais Pap 3 Upload Download Sin eee 1 PLL Reference Frequency Frequency EE EE Sie 3 Squelch SQL RSSI e mm Sean 4 TX Power lt High Low gt NY 5 Maximum Deviation lt Wide Narrow gt l Please adjust the following items when needed RX SG es Power Modulation Sub Audio O CTCSS Deviation lt Wide Narrow gt A RA SEH O DCS Deviation lt Wide Narrow gt TX Power Li ax Dev N 2 O DTMF Alignment laa Y Frequency _ pcs Devin O Sequential Tone DTMF Unit r zeen During alignment you may select the value among dBuV uV EMF or PD or dBm by the UNIT Action of the switches box When the transceiver is in the Alignment mode the ac tion of the SIDE 1 SIDE 2 and PTT keys are ignored All of the action is controlled by the PC Select the alignment menu TX Power TX Power H TX Power L Frequency Sub Audio CTC Dev 1 CTC Dev N DCS DeviW DCS Dev N DTMF Seq Tone Modulation Max Dev 1 Max Dev N Caution Please never turn off the power supply during asuv Em DI dBul
13. aio4y 1 Fe o oa 0 sas e 32 EI ge Q1044 2 Sook NUM 12902V R1117 gt a BN X THe o OF a f 7 ES NUM12902V Po 15K 1 LPF oS OS les E VW E E Ou LIMITTER 3 77 Al DN Ki qa La E m N W R1007 AF REF gs g E EI 47K 1 oO Say mo NW o S ty DS Fo I IMPS C1397 sv TS as as m oe OO 68p CH m par l o a R1012 CLONE d ya e 7 A gt 77 Ee 2a 47K R1283 R1050 93T SEAN ES o Bile TP1029 ST 5 a1002 on t AW AW a 100K 1 o 3 Si RSC OS TARSS35U Me ag 3 DI i D1006 0 EXT PTT aA TE CC J Q1060 C1066 Aioyi a om CPU_3 5V Ko SES T 2SC4617 R DS 3 DA221 i Ca TP1039 Stove Sk DTCI EE Ce JEY 93 Qu A E cys j m tye oo ines Se 33k Mok Ke d we S m S o o T o 45 of OS R1296 D1031 z 1 4 C1063 gt com Jos an 33 ei gt E Ge Nos as a an 22K 1SS400G vu T D1008 0 1 B R1023 C1023 1005 a oo ae nao ATA ot 0 a a on 5 gt A 4 GEET 10v 180K 1 0 022 B16V 100K1 DISC BE ds TAS og og Ex T4 T 3 x bo e It M e I AW o og o9 om aN CPU_3 5V GL Mod ojn z o Sa E o O4 L L o gt FeZ Q1052 4 o o D o mM Ed Ed DD 23 N m 07 0 CRUE SY R1300 R1302 Ne Soe 47S IOT Numiaqoav Ha 3 Gol S ox e Ged 29 AK AK FLAT_AF a lan OF he OS aTa a 4 SEI 7 ja 9 Ta AW MW oj 7 oj a E 01048 2 5 D D o FE H R1301 R1303 Q1007 7 77 o NUM1290 3A 11 al OO ol al al aal amp i a Zo c1402 re Hee E ge 7E RE Se S 160p cH A 5 9 Z a a al a 2 Ie Sls H gt z KX 0 J1003 L1004 ppi012 Ja 2 2 R1029 F a gt VDD Pan E NUM
14. alignment menu UNIT daBur EMF Help Alignment x x Pore Modulation Sub Audio TX Power H Max Dev 1 CTC Dev 1 TX Power L Max Dev N CTC Dev N DCS Dev W Frequency DCS Dev N DTMF Seq Tone OK Cancel TX Power Alignment High CH Freq MHz o T 134 05000 D Z 36 05000 4 D 39 05000 al 42 05000 al 45_05000 al kil Ei 7 g 4 8 154 05000 D 57 05000 4 69 05000 4 14 172 05000 al 15 TI 174 05000 al 78 05000 al Target Power al Watt E 64 128 192 255 Data Default r doa ane o D 158 iss PTT a DB fice ep rr gt aa e gt fee fase se T H fico f 150 pr Basic C Single C All Freq Cancel Select the alignment menu dBul EMF bd Help TX Power Modulation TX Power H Max Dev 1 TX Power L Max DeviN m Sub Audio CTC Dev 1 CTC Dev N Frequency DCS Dew 1 DCS DeviN DTHF Seg Tone Cancel Max Deviation Alignment Wide CH Freq MHz o 1 134 05000 H Z 36 05000 4 Basic C Single MA kHz E 128 192 255 Data Default H gt fies f ise prr gt a E ol fs p em Dl five Pes res gt e Ea err C All Freq Cancel 12 Please adjust the following items when needed CTCSS Deviation lt Wide gt lt Narrow gt This paramete
15. for alignment Default Single Alignment value changes only on the selected channel All Freq Alignment value changes on all channels 5 Maximum Deviation lt Wide gt lt Narrow gt This parameter align the Maximum Deviation Wide Narrow 1 Press the Max Dev W N button to open the Max Devia tion Alignment window 2 Set the Audio Signal Generator to 100 mV with a 1 kHz tone Sine Wave 3 Click the PTT button on the desired channel The radio starts to transmit on the selected channel 4 Set the value to get desired deviation Wide 4 2 kHz Nar row 2 1 kHz on the deviation meter according to the follow ing ways e Dragging the slide bar e Clicking the arrow buttons e Pressing the left right arrow key of the computer s key board e Entering the value 000 255 in the Data box from the computer s keyboard 5 After getting the desired deviation click the PTT button to stop transmitting 6 Click the OK button to finish the Max Deviation alignment and save the data You may select the alignment type from the Radio button lo cated at the button of the screen ADJ Type as needed Basic Low Edge Band Center High Edge and select the channel for alignment Default Single Alignment value changes only on the selected channel All Freq Alignment value changes on all channels VX 261 VHF FM Transceiver Service Manual Select the
16. is buffered by Q1021 25C5010 and Q1019 2SK3077 for the driver amplifier Q1016 RQA0004PXDQS The low level transmit signal is then applied to Q1012 RQA 0011DNS for final amplification up to 5 watts output power The transmit signal then passes through the antenna switch D1003 RN142S and is low pass filtered to sup press away harmonic spurious radiation before delivery to the antenna 2 3 Automatic Transmit Power Control The current detector Q1053 1 NJM12904R detects the current of the driver amplifier Q1016 RQA0004PXDQS and final amplifier Q1012 RQA0011DNS and converts the current difference to the voltage difference The output from the current detector Q1053 1 NJM12904R is compared with the reference voltage by Q1053 2 NJM12904R The output from Q1053 2 NJM12904R controls the gate bias of the driver am plifier Q1016 RQA0004PXDQS and final amplifiers Q1012 RQA0011DNS The reference voltage changes into two levels Transmit Power High and Low controlled by the Electric Vol ume IC Q1018 AK2330 Circuit Description 3 PLL Frequency Synthesizer 3 1 VCO Voltage Controlled Oscillator While the radio is receiving the RX VCO Q1029 CPH3910 generates a programmed frequency between 186 85 and 224 85 MHz as Ist local signal While the radio is transmitting the TX VCO Q1037 2SC4227 generates a frequency between 136 and 174 MHz The output from VCO is amplified by buffer amplifier Q
17. may occur as a result of typographical or other errors that may be present Your cooperation in pointing out any inconsistencies in the technical information would be ap preciated Important Note This transceiver is assembled using Pb lead free solder based on the RoHS specification Only lead free solder Alloy Composition Sn 3 0Ag 0 5Cu should be used for repairs performed on this apparatus The solder stated above utilizes the alloy composition required for compliance with the lead free specification and any solder with the above alloy composition may be used Contents SEENEN H Exploded View amp Miscellaneous Partir als 3 Parts Disl saccaensctsnsnnenccontseascesosdocss icnensiediosassveustededcubseksskskoessveeaaeiscineadsiatassensinedcetnaasecssonssaevsbstnGvaiessaentdvesdrensesecvestaceersexseis 4 Block D sen 5 ET dr e UO uri 6 heeten EE 8 COMING eege 15 Main Umt Ch CU DAB PAIN arica idilio isis aa a a ia Elida 16 General Frequency range Channel Power Supply Voltage Current Consumption Channel Spacing PLL Steps IP Rating Operating Temperature Range Charging Temperature Range Frequency Stability RF Input Output Dimension H x W x D Weight Approx Specifications 136 174 MHz 16 Channels 7 4 V DC 10 1 8 A 5 WTX 12 5 25 kHz USA Model 12 5 kHz 2 5 5 6 25 kHz IP55 22 F to 140 F 30 C to 60 C 32 F to 113 F 0 C to 45 C 2 5 ppm
18. oz KS BI RA1468800 Jam Ale o NE San Mx NYO os x 20 x ma Sty A M J1001 in E do HO ot 5 Ho l ON bet SCH Q1047 wo D ES as ef RA1454200 ay Se 19 Los ee oN os T a ON 9 K 77 2504617 R RE ES wv Ve gt Lox Led ox L Tx Te TSE TS Tak TOR 7r 77 dos as S C1006 L1001 11002 11003 D1003 o o lo L1012 o of Lioso Se R1110 a 0 001 B 0 047u 0 047u 0 033u AN1U2S 0 024 7u 0 009u Paige Rs 22 R1141 C1216 T a ANT O It TO OO A It e GL EE GE TO Leg NW 39 8p CH D1036 TP1001 q 1380 E 2008 C1010 1039 2 r 5 a AW 1H e 01036 77 DA221 mn kel Oo kal e ont Sx DC f As IN nola LSe Lox Lao De LIO AL 01016 ar lage Se Sue ES EAR Ve S E 2SC4617 R TPio02 WZ 9X cag AF Ta ak To TXT mx roa Cer RGA 0 04PXDOS Hay ae KS aks zo oO Ls 4 va gei M e e y GNE as o NI or ror D ie o ogjo lo o Lon a of o C1162 Be JEN E T 3 Jarig g ER H gt R ty se oe o af 2 S ed Si Eis al E a 0 0018 o oe ta an Bet Lu 1 on e nj OS ule nes oA ony le x sy Ser S T Ger 7 mom 7 m t 7 J w E Top Se go Lal iet R Ys qa o 263 Ce 04 oO XT O 16 Ei o 44 dO a an 4 o _ A D z H A TH S a Do Q1019 Q1021 O os ow og an faq os Ma GE C1326 So D1033 On 25K3077 2505010 ON a A Ki El ba CF1001 C1328 a 77 77 R1014 En A ANE SE aq gt o A Ma S C1262 On T REEGELE Bei II DAN222 150 ZC oS Al 0 047u 01012 es z L10214 C1189 las SN 220p CH Ox ol 10V B 10 B TP10ub H 5 e w 8 S3 lag od Te Hy So 0 0 15u SE S aA S RA ia Si d H 5 Ser en a Se
19. x SAM TS ON SAT A SS oi a 12K 1 a E CES on 257 Tra y TO Al x 3 g Lx A We E ax ob ix Q1032 gt S MO Tax 08 ry Nom lao oX 72 gt i Z SS 28C50 10 R1193 R1207 Sx Za m a no AXE ASEN o MA g az C1418 B 01033 A Zo T o3 CH ave NOP AF As CG Ge R1275 e AW 4 2 ao gs r ar Al E R1294 DOTA 14UEE TO gt aia on 47K 1 to ty 3 9K 1 Ei m a 0 mM Q1006 TP1015 Oe an on DE e Me 0 a ol ac AR Lo 77 TP1052 SE al H Dl Zur gt TARSSS0U Tan N Ny no ul got ALA EEGEN le ol Fo Ny on Ta No D r ert ma H Ma Ch E a Mot ER Es belleg 031 9 We A 2 ST Ree S o Ps Ps 7 7 gt S 2 tne e o A1295 R1095 R1096 Ei 7 E 7 aes Ef om n ine 3 15K 1 5 6K1 5 6K S R1281 EE 4 Ze Gr Sx O 14 MN NW AM y 47K T T o OS oO a a LA 2 400 ram 5 14 77 S O Lua gA F2 OI 7 x Sei 3 010514 Zo Te A ES e OTG YEE NUM12902V Og os H a o 5 gt gt E D i S 8 m a pe gt a 77 oi in e W T 77 Ww i gt gt w E a gt a 4 gt H Oo k g T g g E 2 i g 8 a gt al al glo ei 2 g HN Ble gfe m E nlm E a EJ a a F lt a T gt FE mM De n a a a gt a mM i HI ma 4 2 2 o0 gt KI af af gt f E z a D o a a mM ofufufwuft gt gt fufafrvfa ofw a H gt gt ofa gt fafofr uf x z afofafHfufwfafea Q oO w zf w W T e mm H gt aja A z a ua z e in ol loo E alz HI in in Z oO mn a z E ELS be z 1 0 a SJE zl gt E 5 5j gt Z OS B aj uj u a Wd Wd ml e a Gla a a
20. 1026 and Q1021 both 25C5010 The buffered VCO is supplied to the 1st mixer Q1020 3SK293 in case of the reception In the transmission the buffered VCO is supplied to other buffer amplifier Q1019 2SK3077 and then amplified more by Q1016 RQA0004PXDQS and it is put into the final amplifier Q1012 RQA0011DNS A portion of the buffered VCO is fed back to the PLL IC Q1046 AK1541 to control the VCV voltage 3 2 Varactor Control Voltage The tuning voltage VCV of VCO is established the lock range of VCO by controlling the cathode of varactor di odes D1021 D1022 D1023 and D1025 all 1SV325 for receiving and D1027 and D1028 both 1SV325 for transmitting 3 3 PLL The PLL IC Q1046 AK1541 is consists of reference divider main divider phase detector charge pumps and pulse swallow operation The reference frequency from TCXO X1002 16 8 MHz is inputted to pin 10 of PLL IC Q1046 AK1541 and is divided by reference divider On the other hand the feedback signal of the VCO inputted to 17 pin of PLL IC Q1046 AK1541 and is divided with the dividing ratio which becomes same frequency as the output of reference divider These two signals are compared by phase detector and then phase difference pulse is generated The phase dif ference pulse is becomes a DC voltage through the charge pumps and LPF and it controls the VCO The PLL serial data from CPU Q1028 R5F100LHDFB is sent with three lines of SDO pin 5 SCK pi
21. 40 T a m Y gt E n aol Al 25 5 o gt ue Q1027 at ao cizeu GG 01332 3 5V 77 de Ta SS 1 aw 1 op tox e Ken DTC114TE 77 a Lg L E 27p CH 20 E 22 100p CH eee x1002 TP 1004 a Of 0 2 3 ORY o Sa o a TT HST 1 ma ys 16 8MHz R1243 A x 1 2w 1 4 a x a ag ON o 40 SE ES BATT sence D m E m aT Jovy og O o zw a x R1017 1 Lon 00 SIM N Ma GND 00 SR E ai 0 2 N TIo Q1030 1037 ToS SA as a ee o 1 20 1 H ae yy OTCIIUTE 25c4227 P32 aw fats 3 m5 do 136 3 E y 5 8 3 Ta b HQ Us J1002 S 77 RA1250400 3 Q1053 2 C1264 oS Dn R1204 R1205 NUM12900R EN Ll ip ck ox Bod X 25 H Ali EE 77 oS 7 m gt 1053 ny T a ISa No i x X NyM12904R cq R1180 on T og Qad Dm IK ba Q1001 TP1049 af 100K 1 A ore ae ORO ASTA SES Ge R1253 e o RTM002P02 77 aa en a Jen ar T9 SAS Q1017 D a A a DTC 144EE os Roses oe bk L l 0 5 a m EE y SE ook He 01005 ed 2723 22 Tu gt nxn Lu DTC 1LUEE To On cw ON a O AW ts 3 EELER Gs 4 m oD TP10z36 R1309 in a 5 ooo 77 e D 47K 1 Aen ing o AX oc an 1009 SOU Zim Dx 243 DTC 14 LEE 77 e E E 93 13 Dei ZM ai052 2 Z i SR Si 9 NUMi2q02V al x as R1184 c1287 L11042 L1043 L10147 C1309_ ze 77 En i x Da BOK 1 0 001 B 0 039u 0 039u 0 0 39u 0 001 B 7 x gav SCH IS e It rm SE 1 EK Sl gls had Ps un a a N e BE dl 25 En 25 SH 237 Z SE ES TP1031 Did Ate Na Mo gt M o Es 2 a1059 E TE 253 8 aq 0 R I gx or za Jase tte DC UE Alles TP 1022 a g Ae On Se SA
22. 6 ohm BTL for internal speaker or up to 500 mW 4 ohm OTL for ex ternal speaker 1 5 Squelch Circuit There are 16 levels of squelch setting from 0 to 15 The level 0 means open the squelch The level 1 means the threshold setting level and level 14 means tight squelch From level 2 to level 13 1s established in the middle of threshold and tight The level 15 be comes setting of carrier squelch 1 5 1 Noise Squelch The noise squelch circuit is consisted of the band path fil ter noise amplifier Q1047 2SC 4617 and noise detector D1035 DA221 When a carrier isn t received the noise ingredient which goes out of the demodulator section of Q1040 AA32416 is amplified by noise amplifier Q1047 25C4617 through the band path filter and then is detected to DC voltage by D1035 DA221 The DC voltage is inputted to pin 54 A D port of the CPU Q1028 R5F100LHDFB When a carrier is received the DC voltage becomes low because the noise is compressed When the detected voltage to CPU is High the CPU stops the AF output of Q1013 DTC144EE by making to low of the pin 39 of CPU When the detection voltage to CPU is low the CPU al lows the AF output of Q1013 DTC144EE by making to High of the pin 39 of CPU 1 5 2 Carrier Squelch The detected RSSI voltage from pin 12 of Q1040 AA32416 supplied to pin 53 A D port of Q1028 R5F100LHDFB It is control
23. After getting the desired frequency click the PTT button to stop transmitting Click the OK button to finish the frequency alignment and save the data Select the alignment menu daBur EMF DI Help Freq MHz 0 154 05000 4 Help Alignment TX Power Modulation TX Power H Max Dev 1 TX Power L Max Dev N Sub Audio CTC Dev 1 CTC Dev N Frequency ox 192 255 DCS Dev 1 DCS Dev N DTMF Seq Tone Cancel Data Default D E 3 128 PIT mni 2 RX Sensitivity RX Tune This parameter align the RX BPF Band Pass Filter for Receive RX sensitivity The PLL Reference Frequency Frequency alignment must be done before this alignment is performed l Press the RX Tune button to open the RX Sensitivity Alignment window will appear Click the slide bar of the desired channel The radio switches to the selected channel Set the RF Signal Generator according to the indication at the top of the screen Setting Your SG as followings Set the value to get the best RX sensitivity Highest RSSI value according to the following ways e Dragging the slide bar e Clicking the arrow buttons e Pressing the left right arrow key of the computer s key board e Entering the value 000 255 in the Data box from the computer s keyboard Click the OK butto
24. Alignment for the Noise SQL Tight level at Wide 5k 4k or Narrow 2 5k Threshold SQL Level TH NSQ W N The Alignment for the Noise SQL Threshold level at Wide 5k 4k or Narrow 2 5k Tight SQL RSSI Level TI RSSI W N The Alignment for the level 14 of the RSSI SQL level at Wide 5k 4k or Narrow 2 5k TX Save RSSI Level TX SAVE W N The Alignment for the TX Save RSSI level at Wide 5k 4k or Narrow 2 5k The procedure for all the alignments is as follows 1 Click the SQL button to open the SQL Alignment menu vie A 2 Click the Start button on the desired alignment item to open other window TX Power H Max DeviW CTC Dev W 3 Set the RF Signal Generator according to the indication of the Ea E g de z9 DCS Dev 1 window then click the OK button A Dos pew 4 The automatic alignment will start to get the optimum level omr 5 The alignment result will appear in the New box eg On the following alignment items click the OK button and SCH ox SSC then repeat step 2 5 several times according to the indication of the window Threshold SQL Level Wide Narrow ee e Normal RSSI Level Wide Narrow i a a a Tight RSSI Level Wide Narrow TETUA D i SS ES Other alignment items has not extra step only one step proce Pra woe zos mm wsom ass dure rx assram 109 TI rsstim 109 rx Save 1 135 Help rx Save
25. E S od 4 MIC_MUTE 1 pS et KEYI i 37 SE 2 Lox txt Sxl ox a do S Sp cH ad e va E i nen Ser i gt F 3 2 nd axl ax 3 Ss 8 Ge 8 25SC4081 1 3 as E EE ON ze SS numi3255y 2 ADDER as Q1052 1 1e v ocD SAVE E 1 d T T ee as d 3 NJM12902V ER 31002 p 77 77 SSC e REF_MOD AMP oX L o RESET cun Txo Sey SQ aN N5090167 GN TO M ze ze M M 330K 1 A L 5 i ax 7 NY TP1040 vw ER DOE y 1 i ER ar O IN Tey 1 i OoN e 1 ER j gt TP1037 a S T 01023 aye ASF 100LHDFB VO0 1 T1038 Ze 14 4 a DTC114TE Lo y a i e 01028 a C1341 N y om e ER ab OC a S REE e o ise x C1070 R1103 C1340 R1105 Min o R1132 SY C1377 Noe Tir Ne 7 on bBP CH 22k 1 0 0022 B 1 BM Ge b5K1 xo CH Gy a1307 aa o ar S1003 ___ S l g 1 We W e 2 1H W x ES 1 10VB 10K 1 a N5090 167 cs R1104 S q 2 oun 3 W 77 TN m a a Y 77 We E a oX a 120K 1 R1308 3 W mot ay ae a E 1H 9 03 HEr ef 40 do A Y R1116 R1118 R1119 R1122 a 5i C1239 E H 10K 1 MC 1001 C1064 a C1067 OK 1 i os ES ae 1 15K1 B2K1 180K 1 120K 1 y 10p CH TP102 H d Eoo PF0 1055P 0 047 E 0 068 R1028 am os E y w WwW WW A1165 D1017 W L B quad B ie 12K 4 A1032 E 77 D SW 8 ba A7 1554006 Q Z a Spr RES an 0 gt V a A A SE Hido e AM d M he S S pO SE 25 A1166 a om nb DO SX ons 77 Sie Q1043 ze RH fe a 2 ha a E 2 2K 17 e C1220 R1108 E mo ER Mo NuM12902V Sa DN 220K 1 gt SL A DTC114TE T3 DTC1147E Ww gt E AF_REF 0 001 B 18K1
26. I2q02V 3s a E 1407 Ym age e 5 a g E E P1090896 2 7u 10V B 0 22 le Zo MIC PTT JD M d AW h oN oe U R1011 0 1608 e a m Q1055 gt SP OUT AW He SE DTC144EE qiosi 1 Us Cc1072 aa NUM 12902V E INT sp 220 10v OE CD SW A R1013 0 Q1011 R1101 CLONE RTQ040P02 AA k T a GND ad 75 25 5 gt E ALS c An Dan zx nin ASA PN A Q1057 m 1 Q1057 r 07 Kl D ne 39 ja 09 Sa 343 TOOG BE Sb S a an o Se SN74LV40664PW ales II SN74LV4 0664PW Sa i n T Aa ON WEI E oo E Bd Da et aS A O oO aN ot ad al M N VDD pas on a a gt P TET a ee Tal eme ls o goje Lag ae OS S ne 1 2 y MIC gt SS 105 S o E a lon TDA2822L S08 gt 3 som o 5 IN OUT OUT IN Ya fra o 777 NMM1290 3R A So ae IN OUT OUT IN E Ol vss e D DI 8 uF ONTROL on ASA I 7 13 ols a z 71129 C1197 MICEMUTE e e amp gt o wu MIC_MUTE 680 f TP1047 SE a 0 5 10V gt Sr 0 1 C1147 A e Mie 11 TP1013 Em a 0 901 a P INT_SP ny a Q1057 m x D Q1057 1608 na o 1 ww a BERG Don gt TP1017 Sov Me R1074 SN74LV4066APW oS O ole 21198 data SN74LV4O66APW C4 Zqu 2A Ewech 220K 1 a AUST R1128 Os 0 018 0 01 0 1 L Dm 25v 10V B sm j 114 10 8 H 100K _ e SH S Va 4 z DISC ST MN tN II Av SE 0 5 gt d 1H H d o iiy del aS C1145 R1099 IN OUT OUT IN AW 5 C1193 X IN OUT OUT IN cl 28 Sy A C1148 01 680K 1 y 0 018 x ain a D I rk xg 0 1 A1076 IVE ONTROL m Q1045 3 ER SN E SR CONTROL an 10V B 0 12 nyg nana ao Q1015 2 aid wise A2 5 al 01013
27. N 135 6 Click the OK button then the data will be saved and the alignment is finished Tight NSQ Level Wide xj Setting Your SG as followings Frequency Deviation Modulation RF Level 485 05000 MHz 3 0 kHz 1 0 kHz 4 dBuV EMF Help Tight NSQ Level Wide x SQL Tuning is completed Do you change the Alignment Data to Result Current New VX 261 VHF FM Transceiver Service Manual 11 4 TX Power This parameter align the Transmit Output High or Low Power for the selected channel 1 Press the TX Power H L button to open the TX Power Alignment window 3 Click the PTT button on the desired channel The radio starts to transmit on the selected channel 4 Set the value to get desired output power Normally High 5 W Low 1 W on the Power Meter according to the following ways e Dragging the slide bar e Clicking the arrow buttons e Pressing the left right arrow key of the computer s key board e Entering the value 000 255 in the Data box from the computer s keyboard 5 After getting the desired output power click the PTT but ton to stop transmitting 6 Click the OK button to finish the TX Power alignment and save the data You may select the alignment type from the Radio button lo cated at the button of the screen ADJ Type as needed Basic Low Edge Band Center High Edge and select the channel
28. PTT FLAME PTT RUBBER SIDE LATCH NAIL LATCH PLATE COIL SPRING 2 2x12x0 25 x2 pes INDICATOR SPEAKER SP NET WIRE ASSY BLK WIRE ASSY YEL SHIELD SHEET SHEET MICROTEX 8x4 PAN HEAD SCREW M2x3BUS 2 MIC SP CAP ASSY Component CAP MIC SP O RING CAP O RING 0 8x2 2 x2 pcs BIND HEAD SCREW M2 6x6B x2 RA1612600 RUBBER PACKING A pm mp m S CB6984000 Y CHASSIS ASSY RA0292100 SHEET MICROTEX C010 P e mm wm wm le mm mm eee mm m mm mm AAJ67X001 Li lon BATTERY PACK FNB V133LI UNI RA1614100 e LABEL r AAJ68X001 CHASSIS ASSY COMPONENT Li lon BATTERY PACK FNB V134LI UNI CHASSIS CONNECTOR 5MAF11S T02 RUBBER PACKING RUBBER BOOTS SHEET 6x6 SHEET MICROTEX C010 CAUTION LABEL BIND HEAD TAPTITE B 2x10 x2 Printed Circuit Board with Components HOLDER RUBBER MIC SPONGE RUBBER LIGHT GUIDE Y AAH12X101 BELT CLIP CLIP 20 SHIELD CASE COVER FET RING NUT x2 pcs PAN HEAD TAPTITE B M2x5 x13 pcs REF VXSTD P N DESCRIPTION QTY U24110001 BIND HEAD TAPTITE B 2X10 2 U44105001 PAN HEAD TAPTITE B_ M2X5 13 Non designated parts are available only as part of a designated assembly VX 261 VHF FM Transceiver Service Manual 3 Parts List REF DESCRIPTION VALUE MFR s DESIG VXSTD P N FRONT CASE ASSY CB6987000 MIC SP CAP ASSY CB6642000 CHASSIS ASSY CB6984000 RUBBER PACKING RA1612600 RUBBER BOOTS RA1458000 SHEET 6
29. S Gaiei 0 32 e zx H a o 2 A A d mo M A EN DN N E HI L1011 L1015 150p CH 7p CH 150p CH Ser ow fy a 33 eS On UC la O gt Qo gt 0 047u KK It H a 0 ARTS 0 Si Z Sn e x x Gl S Jo OF Wi 01035 O Sr eg Don L1005 L1006 C1080 C1081 c1082 R1056 az md mit ain in Tr o 28C5226A 4 4 39 0 047u 0 047u 150pcH 15p CH 150p CH 0 R1057 S 2 DOl A slo 55 SS a5 NG DEL e I 0 Gi re ve 4 e 1 Y T AE 01015 Tak Zar 226 gt Seca Zei se 212100 a on S CH 045 C1031 C1032 a c1122 0 BFS505 Wi on Joy D I aM 15 oa o nX oS lt 30 WS cow aq e KA ip CK gt 215 on 92 RE 150 a nen E moe ve Les RN o o ne x MIDA ER 5 P CH ER E n gig 9 SF a9 Heel mam o II 1H my Sa DX keet Eet ek vet H 77 zi S aX J a on A TA AR TP1041 20 os 2 EE CA ZP tom Acs Atta x fa ol an on Ey qo a ba 7 anT GoT ow Se a T be S S Ze ac m5 oa J a See le On a m o 0 ete S E i mM wn o ae 39 38 7 77 77 al el sl Sen gt Ska o S ffer gt a ON oH of x R1037 ao of o ms ca 5 Fa o e o a 5 aly 35 0 H a0 o a Ny ux 2 FLZ EN 77 ON A g ggm e Sch ER AW D 8 77 SSP NY HE al as NS 2 00 1608 5 Te pge j Sa OF o as mE H oc a KE FAS we Zaza NE ei C1412 77 wnt SST AT Xa wl TP oy US Wo eo R1138 220p C1231 nS Ziel Bao R1250 o Mes 330 1 CH 12p CH cizue Sin TS 220K 1 77 W Lee 1 D 0068 Ir o AW a P L1024 axl B25V T m E 0 068u T o mM be e 0 oX x o gt pa HS1001 ao qa 3 aL 40 Ba Mx mx a Da
30. a uo zl 3 El 5 ul o i a OI gt i i ol z o S i i aj a 1 e ol 6 M NY Y l a n a a a be iJ A 3 Im i i CHO TUNE F E ma ni Ir TP1030 ni D 1 l 1 a Fl Ww a E X Z E I 0 alm Wl O E E gt Ww Ole Ww a io vj o R1148 Ola E o O a i E oi JI lt alm ol lt Z gt lt x lt CH1 TXPO T oj o 330K 1 nj x a Ww lt l d e H i a x Di S a ol l lt Bl E Q1038 CH2 MIC as R1327 oN E MW a R119 DTA1UUEE e Ex Con ofa o 4 CH3 DTMF DEV o gt mpka D an o a gt O von 14 E m5 1 o bs 5 CHU CTCSS DEV ER 2 Mx os 3 4 TP1008 1 28C4617 R Ke gt WwW Ze x WE EE CHS MOD BAL S A1314 R1313 T to F SR gt amp ay k a gees a dada a CH6 MAX DEV oe bBK 1 33K 1 SS Tx vo a2 A KN l i CH7 FERQ S AW AW T NW M TS On 7 Aig oe o Soo i BO 17 CARREY 0 TP1925 S z ESTOS Du Se Ze 1 o I 100K 1 EN If 4 nS T S a A I 4 M M gt on el L INT_PTT Zei EAS 1 T Te o Seam Fo Ma ii Tesi ace O T R1292 3 5 dr ci S i 3 nales Le 2 e 4 gt 42 SE il Gee 32 gt sv ue 1K 1 ZS ci293 0 z 21 nA al us s e VDD 0 1 10V8 TP1032 ane BE EA 2 E o S s S EEN Gu 3 MER si001i ox ER 21 GG na T nin TP1023 a Mi a N5090167 7 BD TP1909 e ES 21 fy gon o7 Xs gon RESET O 7 9 amp gt gt UE un gt O o S K x y 9 pon 7 1 231 o Ex Com Trio2b DAME N SHIFT 4 gt O e Kassel l gt gt x cono O W 1 47K a L B S1B i ER 7 R1213 C cD_ENC 4 FE R E WS e i Be S
31. ermine whether the same test equipment will be required If not remove the test equipment except dummy load and wattmeter if connected before proceeding Correct alignment requires that the ambient temperature be the same as that of the transceiver and test equipment and that this temperature be held constant between 68 and 86 F 20 30 C When the transceiver is brought into the shop from hot or cold air it should be allowed time to come to room temperature before alignment Whenever possible alignments should be made with os cillator shields and circuit boards firmly affixed in place Also the test equipment must be thoroughly warmed up before beginning Note Signal levels in dB referred to in the alignment pro cedure are based on 0 dBu EMF 1 uV VX 261 VHF FM Transceiver Service Manual 8 Alignment Test Setup Setup the test equipment as shown below for transceiver alignment then apply 7 5 V DC power to the transceiver The Alignment Tool Outline Installation of the alignment tool O Install the CE150 PC Programming Software to your Alignment Mode In the Alignment Mode the aligned data written in the radio will be able to re align its alignment data The value of each parameter can be changed to desired position by e gt arrow key for data up down t arrow key for channel up down direct number input and drag the mouse PC i SCH O Alignment function in the
32. ically from all other steps Have all test equipment ready before beginning and follow all of the steps in a section in the order presented Alignment Required Test Equipment RF Signal Generator with calibrated output level at 600 MHz Oscilloscope a Deviation Meter linear detector In line Wattmeter with 5 accuracy at 200 MHz 50 Ohm RF Dummy Load with power rating 10 W at 600 MHz O Regulated DC Power Supply standard 7 5 V DC 3 A O Frequency Counter with 0 2 ppm accuracy at 200 MHz Audio Signal Generator AC Voltmeter DC Voltmeter VHF Sampling Coupler IBM PC compatible Computer with Microsoft Win dows 2000 XP Vista or Windows7 Vertex Standard CE150 PC Programming Software Vertex Standard FIF 12 USB Programming Interface and CT 104A CT 106 or CT 171 PC Programming Cable O Vertex Standard FRB 6 Tuning Interface Box and CT 160 Connection Cable O Vertex Standard CN 3 P N A08760001 Antenna Connector Q QO OUOUOUU au Alignment Preparation Precautions A 50 Ohm RF Dummy Load and in line wattmeter must be connected to the main antenna jack in all procedures that call for transmission except where specified other wise Correct alignment is not possible with an antenna Because of the BTL Bridged Trans Less Amplifier cir cuit used in the VX 261 do not connect earth side of the speaker leads to chassis ground After completing one step read the following step to de t
33. ing Click the OK button to finish the DTMF Deviation align ment and save the data equential Tone Deviation Select the alignment menu TX Power TX Power H TX Power L Alignment Modulation Max Dev 1 Max Dev N DTMF Alignment Freq MHz 154 05000 4 Help Frequency This parameter align the Sequential Tone Deviation for the 2 Tone and 5 Tone Encoder l VX 261 VHF FM Transceiver Service Manual Press the Seq Tone button to open the Sequential Tone De viation Alignment window will appear Click the PTT button to transmit the radio on the center fre quency channel Set the value to get desired deviation Nominal 3 0 kHz on the deviation meter according to the following ways e Dragging the slide bar e Clicking the arrow buttons e Pressing the left right arrow key of the computer s key board e Entering the value 0 255 in the Data box from the computer e keyboard After getting the desired deviation click the PTT button to stop transmitting Click the OK button to finish the Sequential Tone Deviation alignment and save the data Alignment Select the alignment menu TX Power TX Power H TX Power L Sub Audio CTC Dev lW CTC Dev N DCS Dev W D Devik DTHF seg Tone OK Cancel 192 255 Data Default ARNm men
34. n 6 and PSTB pin 4 The lock condition of PLL is output from the UL pin 7 terminal of the PLL IC Q1046 AK1541 The UL termi nal becomes High at the lock condition and becomes Low at the unlock condition The CPU Q1028 R5F100LHDFB is always watch ing over the UL condition and when it becomes Low unlocked condition the CPU prohibits transmitting and receiving VX 261 VHF FM Transceiver Service Manual 7 Introduction The VX 261 is carefully aligned at the factory for the specified performance across the frequency range speci fied for each version Realignment should therefore not be necessary except in the event of a component failure or altering version type All component replacement and service should be performed only by an authorized Vertex Standard representative or the warranty policy may be void The following procedures cover the sometimes critical and tedious adjustments that are not normally required once the transceiver has left the factory However if damage occurs and some parts subsequently are replaced realign ment may be required If a sudden problem occurs during normal operation it is likely due to component failure realignment should not be done until after the faulty com ponent has been replaced We recommend that servicing be performed only by au thorized Vertex Standard service technicians who are ex perienced with the circuitry and fully equipped for repair and alignment
35. n to finish the RX Sensitivity alignment and save the data You may select the alignment type from the Radio button lo cated at the button of the screen ADJ Type as needed Basic Low Edge Band Center High Edge and select the channel for alignment Default Single Alignment value changes only on the selected channel All Freq Alignment value changes on all channels VX 261 VHF FM Transceiver Service Manual Alignment x Select the alignment menu TX Power Modulation Sub Audio TX Power H Max Dev 1 CTC Dev 1 TX Power L Max Dev N CTC Dev N UNIT DCS Devi asuv EnF DI Frequency DCS DeviN DTMF Seq Tone Help 0K Cancel RX Sensitivity Alignmen t Setting Your SG as followings Deviation 3 0 kHz Modulation 1 0 kHz RF level 10 dBul EMF Step fa RSSI 67 CH Freq MHz D dl 134 05000 H Z 136 0500 Sie es ee es fea es es ees es al 64 128 H AE 255 Data Default E Ze Basic C Single C All Freq gt Be ae mus al SEER HU 192 3 Jee 20 5 51 541 51 5 ka ke A A ni n ef ef ef Geld el elel ef KC ka a w ao J J On On in w o o o e 00 N On o o o e fe Ze bee bee oe pe H o Alignment 3 Squelch SQL This parameter align the SQL Squelch Sensitivity There are several alignments as follows in the Squelch Sensitivity Tight SQL Level TI NSQ W N The
36. nections and battery volt age and try again If the data transfer is successful the LED indicator on the top of the transceiver will turn off Turn both trans ceivers off and disconnect the CT 27 cable You can then turn the transceivers back on and begin normal operation Replace the plastic cap and its two mounting screws m i i Kit Uu D YE AB AAA d by Do Ir CT 27 Optional Cloning Cable 15 Main Unit Circuit Diagram
37. nt Wide CH Freq MHz 0 1 134 05000 H 36 05000 4 69 05000 4 14 172 05000 al is Fees 178 05000 al Help TX Power Modulation Data Default E D kh KH ri Hn ke ke l ke r Kl ke LL KI a 4 sa 24 24154 2 54 54 4 1 854 1 5 ai dl EA E lx 7 LEE EEEIEEEEEIBBEIEE S Sub Audio TX Power H Max Dev 1 CTC Dev 1 TX Power L Max DeviN DCS Dev 1 Frequency DCS DeviN OK Cancel H C Single Bf fo PIT fi cere los cel pare al el ca onl mee EISE limes one al a e PIT E a aaa gt fia a mo PTT fi a 10 PTT fa gt ka PIT off aM o gt u lt Ia PTT gt TE E ees PIT C All Freq Cancel 13 DTMF Deviation This parameter align the DTMF Deviation l S Press the DTMF button to open the DTMF Alignment window Click the PTT button to transmit the radio on the center fre quency channel Set the value to get desired deviation Nominal 3 0 kHz on the deviation meter according to the following ways e Dragging the slide bar e Clicking the arrow buttons e Pressing the left right arrow key of the computer s key board e Entering the value 0 255 in the Data box from the computer s keyboard After getting the desired deviation click the PTT button to stop transmitt
38. plied to the 1st mixer Q1020 3SK293 through the buffer amplifier Q1021 and Q1026 both 25C5010 1 3 IF Amplifier amp Demodulator The Ist IF signal passes through monolithic crystal filters XF1001 47 5 kHz BW to strip away all but the desired signal and then supplied the buffer amplifier Q1035 25C5226 The amplified Ist IF signal is applied to the FM IF subsys tem IC Q1040 AA32416 which contains the 2nd mixer 2nd local oscillator limiter amplifier noise amplifier and RSSI amplifier The signal from reference oscillator X1002 16 8 MHz becomes three times of frequencies in Q1040 AA32416 it is mixed with the Ist IF signal and becomes 450 kHz The 2nd IF signal passes through the ceramic filter CF1001 LTM450GW or CF1002 LTM450EW to strip away unwanted mixer products and is supplied to the limiter amplifier in Q1040 AA32416 which removes amplitude variations in the 450 kHz IF before detection of the speech by the ceramic discriminator CD1001 JT BM450CX24 Circuit Description 1 4 Audio amplifier The detected signal from Q1040 AA32416 is supplied to the AF adder Q1045 1 NJM12902V through the TX RX switch Q1057 2 SN74LV4066A high pass filter Q1045 2 NJM12902V and mute switch Q1057 4 SN74LV4066A The audio signal from Q1045 1 NJM12902V is sup plied to the audio amplifier Q1008 TDA2822L through the AF volume potentiometer VR1001 As a result the audio signal provides up to 700 mW 1
39. r align the CTCSS Deviation of the selected channel 1 Press the CTC Dev W N button to open the CTCSS De viation Alignment window will appear 2 Click the PTT button on the desired channel The radio starts to transmit with the CTCSS tone on the selected chan nel 3 Set the value to get desired deviation Nominal Wide 0 55 kHz Narrow 0 35 kHz on the deviation meter according to the following ways e Dragging the slide bar e Clicking the arrow buttons e Pressing the left right arrow key of the computer s key board e Entering the value 0 255 in the Data box from the computer s keyboard 4 After getting the desired deviation click the PTT button to stop transmitting 5 Click the OK button to finish the CTCSS Deviation align ment and save the data You may select the alignment type from the Radio button lo cated at the button of the screen ADJ Type as needed Basic Low Edge Band Center High Edge and select the channel for alignment Default Single Alignment value changes only on the selected channel All Freq Alignment value changes on all channels DCS Deviation lt Wide gt lt Narrow gt Select the alignment menu RX SQL UNIT dBuY EMF bs Help CH Freq MHz 0 1 134 05000 H Z 36 05000 4 This parameter is to align the DCS Deviation of the selected channel 1 Press the DCS Dev W N bu
40. s the AF output The RSSI output voltage changes according to the signal strength of carrier The stronger signal makes the RSSI voltage to be higher voltage The process of the AF signal control is same as Noise Squelch The shipping data is ad justed 3 dBu EMF higher than squelch tight sensitivity VX 261 VHF FM Transceiver Service Manual 6 2 Transmitter System 2 1 MIC Amplifier The speech signal from internal microphone MC1001 or external microphone J1003 is amplified by Q1044 2 NJM12902V The amplified speech signal from Q1044 2 NJM12902V is supplied to pin 14 of Electric Volume IC Q1018 AK2330 which adjusts the microphone gain through the TX RX switch Q1057 2 SN74LV4066A high pass filter Q1045 2 NJM12902V and other TX RX switch Q1057 3 SN74LV4066A The adjusted speech signal is output from pin 15 of Q1018 AK2330 and then passed through the limiter ampli fier Q1044 1 NJM12902V low pass filter Q1044 2 3 NJM12902V and AF adder Q1052 3 NJM12902V The processed speech signal from Q1052 3 NJM12902V is supplied to pin 22 of Electric Volume IC Q1018 AK2330 which adjusts the maximum devia tion The adjusted speech signal is amplified by Q1052 2 NJM12904R and then is made FM modulation to transmit carrier by the modulator D1019 BB208 of VCO Q1037 28C4227 2 2 Drive and Final Amplifier Stages The modulated signal from the VCO Q1037 2SC4227 is buffered by Q1026 2SC5010 Then the signal
41. tton to open the DCS Devia tion Alignment window 2 Click the PTT button on the desired channel The radio starts to transmit with the DCS code on the selected channel 3 Set the value to get desired deviation Nominal Wide 0 55 kHz Narrow 0 35 kHz on the deviation meter according to the following ways e Dragging the slide bar e Clicking the arrow buttons e Pressing the left right arrow key of the computer s key board e Entering the value 0 255 in the Data box from the computer s keyboard 4 After getting the desired deviation click PTT button to stop transmitting 5 Click the OK button to finish the DCS Deviation alignment and save the data You may select the alignment type from the Radio button lo cated at the button of the screen ADJ Type as needed Basic Low Edge Band Center High Edge and select the channel for alignment Default Single Alignment value changes only on the selected channel All Freq Alignment value changes on all channels VX 261 VHF FM Transceiver Service Manual TX Power Alignment Modulation TX Power H Max Dev 1 CTC Dev 1 TX Power L Max DeviN CTC Dev N Frequency DCS DeviN DTMF Seq Tone OK Cancel CTCSS Freq 151 4 Hz 64 128 192 255 Select the alignment menu UNIT daBu EMF z Help DCS Deviation Alignme
42. x6 RA037690B SHEET MICROTEX C010 RA0292100 CAUTION LABEL RA1614100 BIND HEAD TAPTITE B x2 pcs 2x10 U24110001 MECHANICAL PARTS KNOB VOL RA1612700 KNOB FREQ RA1612800 MAIN UNIT ASSY CB6992000 CD1001 CERAMIC DISC _ JTBM450CX24 A H7901530A_ oos Losse J wetes Les CF1002 CERAMIC FILTER LTM450EW A H3900574A MC1001 MIC ELEMENT PFO1058PP 8290045 Q1012 LEET LI RQaoonDNS 63070392 __ TACT SWITCH EVQPUBO2K N5090167 TACT SWITCH EVQPUBO2K N5090167 TACT SWITCH EVQPUBO2K N5090167 ROTARY SWITCH TP7LBJT16 RY 10487 NO190199 TH1001 THERMISTOR THO54B473FR_ G90m580 VR1001 POT LL TP7LBRN1 B503 RY 10489 J60800323__ X 1001 XTAL EXS00A CG04670 H0103439 X 1002 XTAL OSC 16 8MHz HKE3448A 16 8MHZ H9501511 XF1001 XTALFILTER MFTSO85P50 88MHZ__ H1102361 _ _ SHIELD CASE COVER FET RA125020A RING NUT RA157250A PAN HEAD TAPTITE B M2X5 U44105001 When replace a chip fuse use the part of the same type and value A VX 261 VHF FM Transceiver Service Manual
43. z NN SE C SS SE ii XTAL1 DTMF ENC a DTMF_ENC INT SP DTA114TE CLONE Ao gt CPU SW B SHIFT xT_PT Oy EXT PTT CEONE gt ene DAC EA l W e VDET INT PTT Lea INT PTI DTMF DE CPU CPU SV Less 8 AF_MUTE TXC CPU B DECC P_STB B P_STB AMP_SW CUR_LIM PDN2 gt PDN2 ATQ030P 2SA1774 S 77 RESET e RESET DEC D L DEC_D V S 80835 1ss4006 SNE EA ee CPU CPU OCD CD_ENC CD ENG ACONT O Dec DEC_D RSTO E INT_SP AF_AM lt 4 gt de DA2822 O i i SW B oc KE DO SW VR gt VX 261 VHF FM Transceiver Service Manual 1 Receiver System 1 1 Front end RF amplifier Incoming RF signal from the antenna is delivered to the Main Unit and passes through low pass filter antenna switching diode D1004 and D1005 both 1SS390 high pass filter and removed undesired frequencies by varactor tuned band pass filter D1007 and D1009 both 1SV325 The filtered RF signal is amplified by Q1015 BFS505 and then passes through another varactor tuned band pass filter D1013 and D1014 both 1SV325 to remove the undesired frequencies and then applied to the 1st mixer Q1020 38K293 1 2 First Mixer The RF signal is mixed with the Ist local signal be tween 186 85 and 224 85 MHz in the Ist mixer Q1020 3SK293 to produce 50 85 MHz Ist IF signal The Ist local signal is generated by the VCO which consists of Q1029 CPH3910 varactor diodes D1021 D1022 D1023 and D1025 all 1SV325 The Ist lo cal signal is sup
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