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PRESIDENT GEORGE II Service Manual

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GEORGE II
SERVICE MANUAL

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Summary of Contents for PRESIDENT GEORGE II

  • Page 1 GEORGE II SERVICE MANUAL...

  • Page 2: Specifications

    GEORGE II SPECIFICATIONS General Frequency coverage 26.565MHz 27.405MHz 40 EU / 40 PL / 80 d / 40 EC / 40 UK+40CEPT / 27 In Configuration Operating mode AM(A3E) / FM(F3E) / USB LSB(J3E) Antenna Impedance 50Ω Working temperature –10 ~+55 ℃...

  • Page 3: Circuit Description

    GEORGE II CIRCUIT DESCRIPTION 1. Frequency Configuration The receiver utilizes double conversion, the 1 intermediate frequency is 10.695MHZ & the 2 intermediate frequency is 455KHZ. The 1 local oscillator signal is generated by RF module. 2. Receiver The receiver is double conversion superheterodyne, designed to operate in the frequency range of 26.965-27.405MHz...
  • Page 4 GEORGE II CIRCUIT DESCRIPTION 3. Transmitter Outline The transmitter circuit produces and amplifies the desired frequency directly. It FM-modulates the carrier signal by means of RF module. 1) Mic Amplifier The audio signal from the microphone enters the Audio Processor (U802) for audio pre-emphasis, filtering, etc.
  • Page 5 GEORGE II CIRCUIT DESCRIPTION Controls the power supply unit. 7. Display Circuit The MPU (U800) controls the display LCD. The LCD driver (U800) communicate through the LCD.CS, LCD.CK, LCD.DI lines.

  • Page 6: Block Diagram

    GEORGE II BLOCK DIAGRAM AF.EN Y250 Y251 (455KHz) 10.24MHz MAIN UNIT NB RF AMP NB RF AMP DC SW NB DET NB ATT 2nd LO (10.24MHz) Q265, Q266 U251 Q268, Q269 D274 Q259 Q267 Q261 CB250 AF8R (FM) Q251, Q252 IF AMP 10.695MHz CF251 FM IF IC IF AMP Q255, Q254 1ST MIXER (455KHz) Q256 U252 D271 AF8R Q253 RF AMP...
  • Page 7 GEORGE II EU Adjusting Mode  。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。   Testing Mode: In radio off status, Press and hold PTT+TB+F and turn on radio, LCD shows “TEST”, press NRC→ECHO→VOX ...

  • Page 8: Schematic Diagram

    GEORGE II SCHEMATIC DIAGRAM E100 L111 L109 R159 CGJ-JCJ-0529 L107 LAI-0133 LMA-0009 SWRIND C122 152P3A/J L123 L101 L102 L103 L104 L110 LWS-0009 LWS-0009 LWS-0009 LWS-0009 LAI-0134 R102 R103 TP103 C123 C124 C153 R161 C125 152P3A/J 104P 103P 103P C101 C113...
  • Page 9 GEORGE II SCHEMATIC DIAGRAM L256 R274 R278 LWS0805-0036 Q251 C287 C251 220R R272 C298 R306 TS-0291 R250 102P/J 102P/J 470R 681P/J C258 C309 C259 470K 220R R261 103P 475PC 103P R311 D250 D252 D253 D254 L261 L262 C263 DS-0041 DS-0041...
  • Page 10 GEORGE II SCHEMATIC DIAGRAM AM MOD L552 C557 R586 C563 R570 105PC Q552 LMA-0006 R596 TIP36C 100K U552E R587 R599 104PC ICS-0736 C559 C562 R588 U551B R597 R581 561P/J 104PC ICS-0733 R571 C554 C622 C550 C572 C551 C576 100K 225PA...
  • Page 11 GEORGE II SCHEMATIC DIAGRAM TX.MOD B3V3 Shield450 R451 CB-PBJ-0058 C472 475PA/M C455 225PA C453 C462 TP452 C473 C463 C454 225PA 103P C450 471P/J 103P 225PA 104PC L452 C474 LWS0805-0010 BUSM BUSM X451 L450 QSSMD-0064 102P/J C458 C461 220nH L451 R450...
  • Page 12 GEORGE II SCHEMATIC DIAGRAM J800 Shield800 R825 KEYIN.03 A/D PA05.ANI5 CB-PBJ-0108 KEYIN.01 A/D R831 PA06.AIN6 AA3V3 KEYIN.05 A/D R826 PA07.AIN7 R812 R822 C824 L801 KEYIN.02 A/D R832 PC04.AIN14 JK800 222P 6.8uH R804 CGJ-JCJ-0411 R810 R878 R827 PC05.AIN15 C802 KEYIN.06 A/D...
  • Page 13 GEORGE II SCHEMATIC DIAGRAM 13.2V U750 Q758 ICS-0802 Vout Vout L750 R762 R761 LWS0630-0002 ICS-0884 220K C775 U756 J750 104P ICI-0060 C782 D750 TSK13.3*15*3.8X2 C750 C752 C777 C751 C753 C783 C776 C754 C755 106P E753 C764 DS-0302 103P 104P 105P...
  • Page 14 GEORGE II SCHEMATIC DIAGRAM T908 R902 T903 R908 R936 R937 R938 R940 R909 R910 R911 R913 R914 R915 R916 R918 C900 C904 C909 470R 470R 470R 470R 103P 475PA/M 103P T904 C911 C912 HSG88517-00-FTUNNS-R C922 C923 R905 R906 R907 C914...
  • Page 15 GEORGE II SCHEMATIC DIAGRAM J907 SQPCB W901 CGJ-QTKG-0054...
  • Page 16 GEORGE II PC board views...
  • Page 17 GEORGE II PC board views...
  • Page 18 GEORGE II PC board views...
  • Page 19 GEORGE II PC board views...
  • Page 20 GEORGE II PC board views...

  • Page 21: Parts List

    GEORGE II PARTS LIST MAIN UNIT Designators Comment Description Footprint C100 102P S0805 C101 33P2J/J S1206 C102 3P/C S0805 C103 3P/C S0805 C104 56P/J S0805 C105 47P/J S0805 C106 56P/G S0402 C107 56P/G S0402 C108 56P/G S0402 C109 103P S0603...
  • Page 22 GEORGE II Designators Comment Description Footprint C173 331P/J S0402 C175 33P/J S0402 C176 68P/J S0402 C178 391P/J S0603 C179 181P/J S0603 C181 104P S1206 C185 102P/J S0402 C186 102P/J S0402 C187 102P/J S0402 C188 102P/J S0402 C189 7P/B S0402 C190...
  • Page 23 GEORGE II Designators Comment Description Footprint C288 102P/J S0402 C289 102P/J S0402 C290 102P/J S0402 C291 102P/J S0402 C292 102P/J S0402 C295 102P/J S0402 C296 102P/J S0402 C297 102P/J S0402 C298 681P/J S0402 C299 103P S0402 C300 27P/J S0402 C301...
  • Page 24 GEORGE II Designators Comment Description Footprint C356 104PC S0402 C357 104PC S0402 C358 104PC S0402 C359 104PC S0402 C360 104PC S0402 C361 104PC S0402 C362 104PC S0402 C363 475PA/M S0402A C365 222P S0402 C366 223PC S0402 C367 223PC S0402 C368...
  • Page 25 GEORGE II Designators Comment Description Footprint C468 103P S0402 C469 101P/G S0402 C470 101P/G S0402 C472 475PA/M S0402A C473 471P/J S0402 C474 102P/J S0402 C476 22P/J S0402 C477 101P/G S0402 C480 47P/J S0402 C481 47P/J S0402 C482 103P S0402 C483...
  • Page 26 GEORGE II Designators Comment Description Footprint C581 104P S0603 C582 473PE S0402 C583 226PE/K S1206 C584 104P S0805 C585 1P/B S0603 C586 472P S0402 C587 472P S0402 C588 102P S0603 C589 105PC S0402 C590 102P S0402 C591 102P S0603 C592...
  • Page 27 GEORGE II Designators Comment Description Footprint C808 475PA/M S0402A C809 30P/J S0402 C810 30P/J S0402 C811 104PC S0402 C812 221P S0201 C813 103P S0402 C814 103P S0402 C815 103P S0402 C816 103P S0402 C818 103P S0402 C819 103P S0402 C820...
  • Page 28 GEORGE II Designators Comment Description Footprint C872 103P S0402 C873 103P S0402 C874 471P/J S0402 C875 12P/G S0402 C876 12P/G S0402 C877 102P/J S0402 C880 103P S0402 C882 106PC S0805 CB250 QI-0048 10.695MHz M10.7 CF250 QI-0052 10.695MHz 10M04DS CF251 FCI-0006...
  • Page 29 GEORGE II Designators Comment Description Footprint D804 DS-0224 ESDBL3V3F1 DFN1006 D805 DS-0224 ESDBL3V3F1 DFN1006 D806 DS-0231 1SS400 SOD723 D807 DS-0224 ESDBL3V3F1 DFN1006 E100 CGJ-JCJ-0529 E550 470uF/25V SRB0.160(8MM) E551 470uF/25V SRB0.160(8MM) E552 47uF/35V SRB0.125(6MM) E750 1000uF/25V SRB0.200(10MM) E751 470uF/25V SRB0.160(8MM) E753 470uF/25V SRB0.160(8MM)
  • Page 30 GEORGE II Designators Comment Description Footprint L259 LWS1210-0005 LWS1210A.3225.V1 L260 LWS1210-0005 LWS1210A.3225.V1 L261 ICS-0744 HB617DB-5553Ts-1 BF4-1010 L262 ICS-0744 HB617DB-5553Ts-1 BF4-1010 L263 LWS3225-0006 LWS1210.3225.V2 L264 10uH S0603 L265 10uH S0603 L266 15uH S0603 L267 NLV32T-471J LWS1210.3225.V2 L268 S0603 L269 470nH S0603 L270 8.2uH...
  • Page 31 GEORGE II Designators Comment Description Footprint Q271 TS-0142 RT1N141U EMT3 Q272 TS-0142 RT1N141U EMT3 Q450 TS-0291 9018M SOT23 Q451 TS-0291 9018M SOT23 Q452 TS-0142 RT1N141U EMT3 Q453 TS-0142 RT1N141U EMT3 Q550 TS-0142 RT1N141U EMT3 2SB1132 Q551 TS-0009 SOT89 Q552 TIP36C TO-247(3P)-B-V2.0...
  • Page 32 GEORGE II Designators Comment Description Footprint R134 470R S0402 R135 S0402 R136 S0805 R137 S0805 R143 100R S0402 R145 S0402 R146 S0402 R147 S0402 R148 S0402 R149 S0402 R150 S0402 R151 270R S0402 R152 S0402 R153 270R S0402 R154 S0402...
  • Page 33 GEORGE II Designators Comment Description Footprint R276 470R S0402 R277 470R S0402 R278 S0402 R279 S0402 R280 470R S0402 R281 470R S0402 R282 680R S0402 R283 S0402 R284 S0402 R285 220R S0402 R286 220R S0402 R287 S0402 R288 220R S0402...
  • Page 34 GEORGE II Designators Comment Description Footprint R341 S0402 R342 S0402 R343 S0402 R344 S0402 R345 S0402 R346 S0402 R347 S0402 R348 S0402 R349 S0402 R350 S0402 R351 S0402 R352 S0402 R353 S0402 R354 102P/J S0402 R355 470R S0402 R357 S0402...
  • Page 35 GEORGE II Designators Comment Description Footprint R460 S0402 R461 S0402 R462 S0402 R463 S0402 R464 S0402 R465 330K S0402 R466 100R S0402 R467 S0402 R468 S0402 R469 470R S0402 R470 S0402 R473 100K S0402 R474 220K S0402 R475 S0402 R476...
  • Page 36 GEORGE II Designators Comment Description Footprint R591 S0402 R592 S0402 R593 S0402 R594 S0402 R595 S0603 R596 S0402 R597 S0402 R598 S0402 R599 S0402 R600 S0402 R601 220R/F S1206 R602 6R8/F S1206 R603 2K2/F S0603 R604 S0402 R605 470R S0402...
  • Page 37 GEORGE II Designators Comment Description Footprint R812 S0402 R813 30K(F) S0402 R814 150K/F S0402 R815 S0402 R817 150K/F S0402 R818 S0402 R819 S0402 R820 220R S0402 R821 S0402 R822 S0402 R823 S0402 R824 S0402 R825 S0201 R826 S0201 R827 S0201...
  • Page 38 GEORGE II Designators Comment Description Footprint R878 220R S0402 R879 S0402 R880 1M/F S0402 R881 LMS0603-0011 S0603 R885 S0402 R886 S0402 R887 S0402 R888 S0402 R891 22K/F S0201 R892 22K/F S0201 R893 22K/F S0201 R895 22K/F S0201 R898 22K/F S0201...
  • Page 39 GEORGE II Designators Comment Description Footprint C901 103P S0402 C902 103P S0402 C903 103P S0402 C904 475PA/M S0402A C905 475PA/M S0402A C906 475PA/M S0402A C907 104PC S0402 C908 105PC S0402 C909 103P S0402 C911 103P S0402 C912 103P S0402 C913...
  • Page 40 GEORGE II Designators Comment Description Footprint D934 DLS0603-0003 ORANGE SD0603(LED) D935 DLS0603-0003 ORANGE SD0603(LED) D936 DLS0603-0007 GREEN SD0603(LED) D937 DLS0603-0007 GREEN SD0603(LED) D938 DLS0603-0007 GREEN SD0603(LED) D939 DLS0603-0007 GREEN SD0603(LED) D940 DLS0603-0007 GREEN SD0603(LED) D941 DLS0603-0007 GREEN SD0603(LED) D942 DLS0603-0007...
  • Page 41 GEORGE II Designators Comment Description Footprint D993 DLS0603-0010 BLUE SD0603(LED) D994 DLS0603-0010 BLUE SD0603(LED) D995 DLS0603-0010 BLUE SD0603(LED) D996 DLS0603-0010 BLUE SD0603(LED) D997 DLS0603-0010 BLUE SD0603(LED) D998 DLS0603-0010 BLUE SD0603(LED) D999 DLS0603-0010 BLUE SD0603(LED) D1000 DLS0603-0010 BLUE SD0603(LED) D1001 DLS0603-0010...
  • Page 42 GEORGE II Designators Comment Description Footprint R934 S0402 R935 S0402 R936 470R S0603 R937 470R S0603 R938 470R S0603 R939 470R S0603 R940 470R S0603 R941 470R S0603 R942 470R S0603 R943 470R S0603 R944 470R S0603 R945 470R S0603...

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