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FM TRANSCEIVERS

Service

Manual

Содержание V7

Страница 1: ...V7 1 V7 FM TRANSCEIVERS Service Manual ...

Страница 2: ...nce 50Ω TRANSMITTER Frequency Stability 5ppm Output Power 5W High 1W Low Max Frequency Deviation 2 5KHz Intermodulation Response Rejection 70dB Audio Distortion 10 Adjacent Channel Power 65dB Occupied Bandwidth 16KHz RECEIVER RF Sensitivity 0 2μV Audio Frequency Response 300 3000Hz Audio Output 0 5w Audio Distortion 10 All stated specifications are subject to change without notice or obligation ...

Страница 3: ...ration of the receiver is shown in Fig 2 1 Front end RF amplifier An incoming signal from the antenna is applied to an RF amplifier T201 after passing through a transmit receive switch circuit D101 D102 D103 and a 3 pole LC filter L203 L204 After the signal is amplified T201 the signal is filtered by a band pass filter a 3 pole LC filter L217 L218 L221 to eliminate unwanted signals before it is pa...

Страница 4: ...r lower than the preset value To output sounds from the speaker U811 sends a high signal to the AF Power Iines and turns U481 on through T471 T472 6 Receive signaling QT DQT The output signal from FM IC U200 enters the microprocessor U811 U811 determines whether the QT or DQT matches the preset value and controls the AF Power and the speaker output sounds according to the squelch results 3 PLL fre...

Страница 5: ...r consists of two MOS FET stages The output of the RF power amplifier is then passed through the harmonic filter LPF and antenna switch D101 D102 and applied to the antenna terminal 5 Power supply There are four 5V power supplies for the microprocessor 5M 5C 5R and 5T 5M for microprocessor is always output while the power is on 5M for microprocessor is always output while the power is on 5M is alw...

Страница 6: ...t contains the transceiver control program for the CPU and data such as Transceiver channels and operation features 2 Low Battery Warning The battery voltage is checked using by the microprocessor 1 The red LED blinks when the battery voltage falls below 6 2V 2 A Warning tone generates when the red LED blinking See Fig 4 ...

Страница 7: ...lloscope Measurable frequency Audio frequency 4 Audio dummy load Impedance 8 ohm Dissipation 1W or more Jack 3 5mm 5 SSG Output frequency 200MHz or more Output level 20dBu 0 1uV 120dBu 1V Modulation FM 6 Spectrum Analyzer Measuring range Up to 2GHz or more 7 Power meter Measurable frequency Up to 200MHz Impedance 50 unbalanced Measuring range 0 1W 10W 8 Audio volmeter Measurable frequency Up to 10...

Страница 8: ...40dB Distortion 1 100 11 Frequency counter Measurable frequency Up to 200MHz Measurable stability Approx 0 1ppm 12 Linear detector Measurable frequency Up to 200MHz Characteristics Flat CN 60dB or more Note Standard modulation 1kHz 2 5kHz DEV Reference sensitivity 12dB SINAD Specified audio output leve 200mW at 8 ...

Страница 9: ... C211 C214 C227 C247 C106 C102 C215 C109 C207 C213 C222 C303 C173 C177 C401 C419 C421 C337 C371 C831 C305 C376 C378 C113 C119 C123 C343 C345 C350 C324 C849 C902 472P 0402 3 C413 C481 C282 273P 0402 1 C418 223P 0402 5 C420 C422 C515 C521 C523 473P 0402 4 C441 C445 C483 C281 332P 0402 3 C442 C448 C846 680P 0402 2 C443 C848 820P 0402 1 C447 221P 0402 3 C484 C485 C284 C836 C837 C838 C839 C832 C833 C83...

Страница 10: ...0 C126 C134 C137 5P 0603 3 C154 C151 C149 1P 0603 1 C148 470P 0603 1 C145 102P 0603 1 C138 15P 0603 1 C136 10P 0603 1 C135 33P 0603 1 C133 Comment Footprint Quantity E405 E423 E514 E337 E301 E281 E302 105P 0805 2 C471 C901 6 8uF 0805 1 E173 2 2uF 0805 1 E417 223P 0805 1 E452 E471 E482 E362 E232 E248 E908 E910 0 1uF 0805 2 E319 E321 1uF 0805 2 E320 E126 Comment Footprint Quantity 22uF EIA3528 1 E32...

Страница 11: ... R281 R282 R283 R392 R417 R485 R514 R814 R850 R851 R291 R192 R309 R256 R346 R375 R224 R402 R403 R404 R406 R370 R374 R215 R223 R413 R253 R210 R824 R845 R336 R335 R216 R218 R207 R414 R483 R836 R837 R838 R839 R133 R317 R493 R820 R821 R200 R321 820R 0402 1 R416 750K 0402 1 R420 22K 0402 5 R421 R453 R516 R305 R324 30K 0402 1 R423 51K 0402 1 R424 1K8 0402 1 R433 R441 R442 R446 R448 R306 R846 R522 1M8 04...

Страница 12: ... 1 R237 180K 0402 2 R243 R245 3 9K 0402 1 R244 22R 0402 4 R345 R103 R106 R343 15K 0402 2 R822 R337 82K 0402 1 R823 Comment Footprint Quantity 0R 0603 1 R123 4K7 0603 2 R351 R332 Comment Footprint Quantity 0 33R 1206 3 R160 R161 R162 0R 1206 1 R901 Comment Footprint Quantity 1K RP 1206 4 2 PR811 PR301 47K RP 1206 4 1 PR813 Comment Footprint Quantity 100K RV1208 1 RV453 50K RV1208 1 RV307 12 Chip Re...

Страница 13: ...P L0603 1 L119 560nH L0603 1 L225 330nH L0603 1 L226 301T L0603 1 L821 0R L0603 2 L900 L323 5P L0805 2 L332 L351 101T L0805 3 L105 L126 L901 220nH L0906 1 L139 1uH L1009 1 L114 1uH L1310 1 L118 5T LC 0352424 3 L111 L112 L113 6T LC 0352428 5 L204 L214 L110 L218 L221 0R LC 0352428 1 L201 8T LC 0352436 1 L128 100nH L S5R0301020 1 C333 150nH L S5R0301020 1 C352 inductance Designators 13 7 100nH L0603 ...

Страница 14: ...uantity 2SK3476 2 5N1A 1 T107 2SK3078 SOT89 1 T105 2SC3357 SOT89 1 T102 Comment Footprint Quantity 2SC4617 ESM 2SC4617 S 3 T451 T441 T845 2SC4617 S ESM 2SC4617 S 1 T361 2SB624 TSM 4 T391 T471 T191 T822 MRF497 USM 1 T414 Comment Footprint Quantity 2SC4649 ESM 1 T203 2SC3356 USM 2SC3356 R25 2 T372 T373 2SC4226 USM 1 T101 Light Emitting Diode Designators High Frequency Switching Diode Designators Var...

Страница 15: ...99 TSQ 2 T202 T201 Comment Footprint Quantity U TMP87P805BU QFP44 1414 P1 0 1 U811 LM4558 SOP8 245 1 U411 AUDIO SOP8 245 1 U511 24C32 SOP8 245 1 U821 5A SOT89 5A JN0102 1 U909 TA7368 SSOP10 225 P1 0 1 U481 TA31136F SSOP16 225 1 U200 LMX2336ATM SSOP20 225 1 U301 NJM2904V SSOP8 225 1 U161 Switching FET Transistors Designators Integrated Circuits Designators 15 Swiching Transistors Designators Dual G...

Страница 16: ...HZ FX UM 5 2S 1 CR240 Comment Footprint Quantity C24 FX BS 06260 1 CR255 Comment Footprint Quantity 16 8MHZ FX DS0305 1 CR340 Comment Footprint Quantity 32 768KHz FX DS 6025 1 CR825 Ceramic Filter Designators Crystal Filters Designators Crystal Oscillator Designators 16 Ceramic Oscillator Designators TCXO Designators ...

Страница 17: ...06 1 JK481 3 5mm JK ST 301 6 F 1 JK402 JP4 JP I3T050 150S 1 JP401 JP16 JP S16S100 050S 1 JP811 MIC MIC60 1 MIC401 MONI S 1 1 SW401 CALL S 1 1 SW400 SP SP JN0101 1 SP401 RD82 TD2 S RD82 T02 1 SW812 RD840G S RD840G 1 SW811 RD91 S RD910S 1 VR411 PTT S TD 15EA 1 SW402 Orthers Designators 17 ...

Страница 18: ...R712 R713 R714 R710 560R R0402 2 R715 R716 C 1 C0402 1 C720 DIO 2 D0603 4 D712 D715 D713 D710 DTC114EE T ESM DTC114EE 3 T711 T712 T713 GD 4460 JN_JN04 1 LCD720 JP16 JP S16S100 050S 1 JP710 R 1 R0402 7 R724 R723 R729 R725 R726 R727 R728 R 2 RP 1206 4 1 RP700 S6A0069 U CHIP80 S6A0069 JN04 1 U720 ZJDB 756B Y D LED B420160 3PNA 1 D720 JN0402 Designators 18 ...

Страница 19: ...8 11 12 7 6 3 4 5 2 13 14 15 16 17 18 20 21 A A A A A A A A 9 10 ...

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Страница 24: ... C703 100P R718 4K7 R717 4K7 C718 104P C717 104P SCHEMATIC DIAGRAM 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 JP710 JP16 A B C D E F G H I J A B C D E F G H I J K K 1 2 5 3 4 1 2 5 3 4 CALL 1 2 3 4 5 6 7 8 9 0 VFO MANU C09 C10 C11 C12 C13 C14 C15 C16 S01 S02 S03 S04 S05 S06 S07 S08 S09 S10 S11 S12 S13 S14 S15 S16 S17 S18 S19 S20 C01 C02 C03 C04 C05 C06 C07 C08 S21 S22 S23 S24 S25 S26 S27 S28 S29 S30 S...

Страница 25: ...KHz C821 104P L821 301T C826 22P C825 22P T822 2SB624 C822 103P 3 2 1 SW811A RD840G 6 5 4 9 8 7 12 11 10 VOUT 4 VDD 5 GND 3 SDA 1 RST 7 GND 6 OSC 2 SCL 8 U511 AUDIO A0 1 A1 2 GND 4 DA 5 CK 6 A2 3 WP 7 Vcc 8 U821 24C32 PR811 NC C811 NC C812 NC C827 103P R827 10K R548 680R C548 104P C549 104P R549 4K7 C547 103P C546 104P R546 330K R545 10K C831 102P R832 47K R830 150K R831 150K 5M 5M T845 2SC4617 R8...

Страница 26: ...TLAE 010 LPF LPF 5T 5T AGC 1SS 372 MRF497 DC Regulator 5A 5M DCS Balence Circuit P LLOSC Addjust er 5C TX Path RX Path 1 2 5T 5M DTC114EE 2SB624 X 2 L208 L211 L214 L204 L230 AF RXD PTT TXD RED LPF BATTERY BATT Test PLL LD PLL Data PLL CS PLL CLK MPU TMP87P805U PC5 P LL CS PC4 Save TX RX Control RE D TXD PTT RXD AP C Tune BA TTTest V OX SQL CDC SS CTCSS AF POWER DCS CTCSS Filter OSC 32 768K Hz Rese...

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