Cobra MR HH425 LI VP Serivce Manual
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Cobra MR HH425 LI VP Serivce Manual

Marine handheld transceiver
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Specifications ...............................................................................................................................2
Theory of Operation ....................................................................................................................4
Block Diagram .............................................................................................................................7
Disassembly Instructions ..............................................................................................................8
Alignment Procedures ...............................................................................................................9
Adjustment Procedure ...............................................................................................................10
Wiring Diagram .........................................................................................................................12
Printed Circuit Board ..................................................................................................................13
Troubleshooting ..........................................................................................................................16
Exploded View ..........................................................................................................................18
Mechanical Parts List .................................................................................................................21
Electrical & Packing & Other Parts List ..........................................................................................23
IC Lead Identification and Internal Diagram ............................................................................46
Transistor Lead Identification .........................................................................................54
Voltage Chart .............................................................................................................................56
Schematic Diagram.....................................................................................................................63
Version:01 Date: Jan 03,2008

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Summary of Contents for Cobra MR HH425 LI VP

  • Page 1: Table Of Contents

    Page Specifications .................……………………….………...……2 Theory of Operation .………………...........………..………………..….4 Block Diagram ................……...…………………………………7 Disassembly Instructions ............………..………………………...…8 Alignment Procedures ...……………...........……....…...…………………9 Adjustment Procedure ……..…………..............…………………10 Wiring Diagram ……..............…………..…………………….……12 Printed Circuit Board ..............……………..……………………...13 Troubleshooting …...................………...……………………16 Exploded View ..............…………………………..………………..18 Mechanical Parts List ..............…………………….…………….…21 Electrical & Packing & Other Parts List ..............…………………...….23 IC Lead Identification and Internal Diagram ....………………………………………..………..46 Transistor Lead Identification …………………………………………………………….……...……….54 Voltage Chart ................………………….……………...……56...

  • Page 2: Specifications

    SPECIFICATIONS Measurement Conditions Frequency range:transmit 156.025 To 157.425 Frequency range:receive 156.050 To 162.025 Number of channels 59 INT Channels 57 USA Channels 57 Canada Channels Memory channels All marine channels Oscillate mode Modulation FM(16K0G3E) Channel spacing Frequency stabllity ±10 Stantard operation temperature °C -20 To+55 Normal working voltage...
  • Page 3 78.4MHz ≥ 46 39.2/ 146.8/ 154.4/ 155.9/ 157.8/ 158.2/ 163.9/ 249.4MHz ≥ 50 Other frequency ≥ 70 Adjacent ch.rejection ≥ 55 Image rejection ≥ 65 Intermod rejection ( 3-Gen.Method ) ≥ 60 Scan time. per channel ≤ 200 Speaker output:8Ω load @ max vol. ≥...

  • Page 4: Theory Of Operation

    THEORY OF OPERATION This is a PLL - controlled VHF and UHF dual band marine transceiver provides an accurate and stable multi-channel operation. The transceiver consists of 8 main sections: Transmitter Receiver Low voltage detection Vibration Alert Voice recorder Local oscillator PLL (Phase Lock Loop) Circuit Memory backup Transmitter The audio is picked up from the internal MIC, the audio signal is then amplified by Audio Amplifier, U9...
  • Page 5 is filtered by another low-pass filter circuit which consists of C91, L13, C84, C80, L12, C83, C70, L11 and C67. These low pass filters are necessary to suppress the second and third harmonics. The signal is then fed into the antenna input and radiated out. TX current converts into a voltage signal, then fed into U3 LM2904 (1/2) for amplifying.
  • Page 6 The second IF passes through U1 (BA4116) internal squelch control R166, C138, C139 form as a squelch amplifier. The ceramic filter produces a squelch signal (RF noise). Pin 14 of U1 sends the digital squelch control signal to the CPU mute the audio speaker path. Pin 12 of U1 output a RSSI level to the CPU. Low Voltage Detection The battery voltage, divided by R221, R222 is input to U7 Pin 6 for voltage level sample.

  • Page 7: Block Diagram

    BLOCK DIAGRAM...

  • Page 8: Disassembly Instructions

    DISASSEMBLY INSTRUCTIONS To remove the front and rear panels from the main chassis: 1. Remove the rubber antenna, SPK/MIC knob and the VOL/SQL knob from the main unit. 2. Remove 4 screws from the rear housing of main unit. 3. Detach the die cast from the front housing.

  • Page 9: Alignment Procedures

    ALIGNMENT AND PROCEDURES This unit has been fully aligned at the factory before shipment and does not normally require further adjustment. When necessary, however, the unit may be aligned as indicated below. Do not adjust any circuit in this radiotelephone unless you understand the circuit operation and have experience in adjusting the radiotelephone.

  • Page 10: Adjustment Procedure

    ADJUSTMENT PROCEDURE Step Adjustment Test Point Procedure 1. Connect digital voltmeter to TP1 on RF PCB. 2. Set VHF CH01. L44 VHF Receive TP1 3. Adjust L44. 4. TP1 voltage 1.2~1.6V DC. 1. Connect a digital voltmeter to TP1 on RF PCB. 2.
  • Page 11 Main PCB Top View Bottom View...

  • Page 12: Wiring Diagram

    WIRING DIAGRAM CHARGER+ CHARGER-...

  • Page 13: Printed Circuit Board

    PRINTED CIRCUIT BOARD Main PCB Top View...
  • Page 14 PRINTED CIRCUIT BOARD Main PCB Bottom View...
  • Page 15 PRINTED CIRCUIT BOARD LCD PCB Bottom View Top View Charger PCB Top View Bottom View...

  • Page 16: Troubleshooting

    TROUBLE SHOOTING Item Symptom Possible Cause Defective power switches VR4. Unit does not turn on. Check the battery voltage. Defective regulator U12. Speaker no sound with Defective volume control. AF signal applied to Defective speaker. volume control Defective U14 and/or associated components. Check squelches control.
  • Page 17 Check TP2 voltage 0.5 – 4V; Only UHF No transmit (TX) Defective D14, Q10, Q9; Check TP1 voltage 0.5 – 4V; Only VHF No transmit (TX) Defective D12, Q5, Q4; Defective microphone. Poor or no modulation Defective U9 and/or its associated components. Defective VR2, VR3 Deviation of transmit Check crystal X2 and VC1.

  • Page 18: Exploded View

    MAIN UNIT EXPLODED VIEW...
  • Page 19 CHARGER UNIT EXPLODED VIEW...
  • Page 20 BATTERY TRAY UNIT EXPLODED VIEW...

  • Page 21: Mechanical Parts List

    MAIN UNIT EXPLODED VIEW Ref.No. Description Mfr's Part No. CAB FNT MU COBRA TM833USL ABS BLK 3U2X ROHS 051L003472C012 INSU WATERPROOF FILM D9.5MM ROHS 058LD95047-20006 INSU SHT- NYLON D37.3 TM832EUL SPEAKER FELT 058L002895C013 KEY RUB FUN -6K MAIN TRANSLUCENT 433C TM833USL ROHS...
  • Page 22 Ref.No. Description Mfr's Part No. PLAS MOUNIG- BAT PACK POCKET ABS BLK 3U2X TM832EUL ROHS 056L006982C011 CAB FNT CHG COBRA TM833USL ABS BLK 3U2X CM110-008 ROHS 051L003473D015 LENS LTGD LED LENS FOR CHG TM832EUL PMMA TRANSPARENT ROHS 055L002779C020 061L003059C018 CONT COM CHARGE-- TM832EUL T03 PHOSPHOR COPPER GP ROHS PCB DS FR4- L70.1--W45.2--T10 CHA GP TM833USL REV.3 ROHS...

  • Page 23: Electrical & Packing & Other Parts List

    058L002947-016 CONT COM PLATE--- TM833USL T03 BS ROHS 061L003084-015 METAL PLATE ----- T03 S/S LCD MOUNTING TM832EUL ROHS 063L003946D016 INLAY KEY- SUS304+ADHESIVE TM833USL UNIT COBRA ROHS 076L002624-018 INLAY KEY- SUS304+ADHESIVE TM833EUL COBRA ROHS 076L002625-015 CUSH SPON 40*4*3MM TM832 ROHS 089L003426-017...
  • Page 24 021L662021-10126 R407 RES-CF- 1K---OHM 1/16W J 0402- 200PPM ASJ CR10-102-JT 021L210019-10222 PCB 2L FR4- L32---W20---T10 V3 LCD GP TM833USL ROHS 116L2833US-56D33 TM833USL/MAIN/TOP/SMD/PCBA COBRA/US/BLK/REV.0 A29P4030101L0008 CAP-CSM 1---U/K 10-V 0603--X5R EYANG 003L261052-515H7 LED SMD-- ORG 2V1- 3216 JOYWOW JW-CS-1204O1-JC ROHS 015L000302-10004 CAP-CSM 1---N/K 50-V 0402--X7R MURATA GRM155R71H102K ROHS...
  • Page 25 PART LIST MAIN PCB ASSEMBLY Ref.No. Description Mfr's Part No. C201 CAP-CSM 100-N/K 16-V 0402-X7R *** 003L211041-61360 C204 CAP-CSM 100-N/K 16-V 0402-X7R *** 003L211041-61360 C205 CAP-CSM 100-N/K 16-V 0402-X7R *** 003L211041-61360 C206 CAP-CSM 100-N/K 16-V 0402-X7R *** 003L211041-61360 C207 CAP-CSM 100-N/K 16-V 0603--X7R *** 003L211041-61566 C210 CAP-CSM 100-N/K 16-V 0402-X7R ***...
  • Page 26 PART LIST MAIN PCB ASSEMBLY Ref.No. Description Mfr's Part No. RES TFC 18K--OHM 1/16W J 0402- *** 200 021L618029-10129 RES-TFC 47K--OHM 1/16W J 0402- *** 200 021L247029-10223 RES-TFC 47K--OHM 1/16W J 0402- *** 200 021L247029-10223 RES-TFC 150K-OHM 1/16W J 0402- *** 200 021L615039-10121 RES TFC 47---OHM 1/16W J 0402- *** 200 021L647099-10122...
  • Page 27 VR LIN TRIMMER 50K- B - 0.15W PANASONIC EVM3YSX50B54 +/-25% 026LA50311-70001 PCB 4L FR4- L112.5W57T10REV.4 MAIN TM833USL L2-3:0.2MM ROHS 116L4833US-56B47 TAPE KAPTON T805-3/4 OR K250- 3/4 (19*33M) 239L903800-00006 TM833USL/MAIN/BTM/SMD/PCBA/ COBRA/US/BLK/REV.0 A29P4030114L0003 CAP-CSM 4---P/C 50-V 0603--COG MURATA 003L884095-06565 CAP-CSM 1---U/Z 6.3V 0402--Y5V MURATA GRM155F50J105Z ROHS 003L201050-68366 003L51006B-60000...
  • Page 28 PART LIST MAIN PCB ASSEMBLY Ref.No. Description Mfr's Part No. CAP-CSM 1000P/K 10-V 0402--X7R *** 003L211021-01388 CAP-CSM 1000P/K 10-V 0402--X7R *** 003L211021-01388 CAP-CSM 1000P/K 10-V 0402--X7R *** 003L211021-01388 CAP-CSM 1000P/K 10-V 0402--X7R *** 003L211021-01388 CAP-CSM 1000P/K 10-V 0402--X7R *** 003L211021-01388 CAP-CSM 1000P/K 10-V 0402--X7R *** 003L211021-01388 CAP-CSM 1000P/K 10-V 0402--X7R ***...
  • Page 29 PART LIST MAIN PCB ASSEMBLY Ref.No. Description Mfr's Part No. CAP-CSM 33--P/J 50-V 0603--NPO *** 003L153305-05563 CAP-CSM 1000P/K 10-V 0402--X7R *** 003L211021-01388 CAP-CSM 33--P/J 50-V 0402--COG MURATA GRM1555C1H330J ROHS 003L883305-05364 CAP-CSM 12--P/J 50-V 0603--COG MURATA 003L881205-05565 CAP-CSM 12--P/J 50-V 0603--COG MURATA 003L881205-05565 CAP-CSM 12--P/J 50-V 0603--COG MURATA 003L881205-05565...
  • Page 30 PART LIST MAIN PCB ASSEMBLY Ref.No. Description Mfr's Part No. C126 CAP-TC- 10--U/K 16-V CASEA---- *** ROHS 664L331001-61A92 C128 CAP-CSM 100-N/K 16-V 0402-X7R *** 003L211041-61360 C130 CAP-CSM 100-N/K 16-V 0402-X7R *** 003L211041-61360 C131 CAP-CSM 6800P/K 50-V 0402--X7R EYANG ROHS 003L216825-013H6 C132 CAP-CSM 100-N/K 16-V 0402-X7R *** 003L211041-61360...
  • Page 31 PART LIST MAIN PCB ASSEMBLY Ref.No. Description Mfr's Part No. C177 CAP-CSM 100-P/J 50-V 0402--COG MURATA 003L881015-05365 C178 CAP-CSM 100-N/K 16-V 0402-X7R *** 003L211041-61360 C181 CAP-CSM 1000P/K 10-V 0402--X7R *** 003L211021-01388 C186 CAP-CSM 1000P/K 10-V 0402--X7R *** 003L211021-01388 C188 CAP-CSM 100-N/K 16-V 0402-X7R *** 003L211041-61360 C189 CAP-CSM 1000P/K 10-V 0402--X7R ***...
  • Page 32 PART LIST MAIN PCB ASSEMBLY Ref.No. Description Mfr's Part No. C246 CAP-CSM 3.3-N/K 50-V 0402-X7R MURAT GRM155R71H332KA01D 003L213325-01369 C247 CAP-CSM 180-P/J 50-V 0402--COG MURATA GRM36COG181J50 ROHS 003L881815-05363 C248 CAP-CSM 680-P/K 50-V 0402--X7R MURATA GRM155R71H681K ROHS 003L216815-01362 C249 CAP-CSM 47--N/K 25-V 0402--X7R EYANG 003L214732-513H3 C250 CAP-CSM 22--N/K 16-V 0402-X7R ***...
  • Page 33 PART LIST MAIN PCB ASSEMBLY Ref.No. Description Mfr's Part No. FLTR- 160M---- -20+60 HDF111 201L160600-30000 FLTR- 160M---- -20+60 HDF111 201L160600-30000 FLTR- 465M----- 150 -20+60- SHOULDER HDF465B S-3 SMD ROHS 201L465671-31009 JACK STER F VERT D2.6 SMD TG-2866D-PA6T-G ROHS 019L322256-01006 COIL-AIR 150--NH J 0805 Q=30 MURATA LQW2BHNR15J03L ROHS 006L5150A1-43815 COIL-AIR D1.6*4T*0.35MM SMD(-) ZHENGLONG...
  • Page 34 PART LIST MAIN PCB ASSEMBLY Ref.No. Description Mfr's Part No. INDUCTOR 39--NH- J-----0603- MURATA LQG18HN39NJ00D 006L439B94-37110 INDUCTOR 15---NH- J----- 0603 MURATA LQG18HN15NJ00D 006L515B94-27218 CHOKE--- 2.2---UH J 1.55R 2520 TDK NLV25T-2R2J-PF 006L822503-50004 INDUCTOR 12---NH- J------ 0603 MURATA LQG18HN120J00 006L412B94-37110 INDUCTOR- 12---NH- J 10R 0603 PANASONIC ELJRE12NJFA ROHS 006L412B94-37158 COIL-AIR SMD 6-T*D3.0*0.5MM(-) ZHENGLONG ROHS 006L360303-B0005...
  • Page 35 PART LIST MAIN PCB ASSEMBLY Ref.No. Description Mfr's Part No. TRS BJP PW SC-70- 2SA1577Q---- ROHM 023L231577-10001 TRS BJP PW SC-70- 2SA1577Q---- ROHM 023L231577-10001 TRS BJN SS SSM--- 2SC5066----- TOSHIBA (120-240) 023LC50661-61405 RES TFC 10---OHM 1/16W J 0402- *** 200 021L610099-10129 RES TFC 47---OHM 1/16W J 0402- *** 200 021L647099-10122...
  • Page 36 PART LIST MAIN PCB ASSEMBLY Ref.No. Description Mfr's Part No. RES-TFC 2.2K-OHM 1/16W J 0402- *** 200 021L622019-10122 RES-TFC 2.2K-OHM 1/16W J 0402- *** 200 021L622019-10122 RES-TFC 6.8K-OHM 1/16W J 0402- *** 20 021L668019-10126 RES-TFC 2.2K-OHM 1/16W J 0402- *** 200 021L622019-10122 RES-TFC 2.2K-OHM 1/16W J 0402- *** 200 021L622019-10122...
  • Page 37 PART LIST MAIN PCB ASSEMBLY Ref.No. Description Mfr's Part No. RES-TFC 68K--OHM 1/16W J 0402- *** 200 021L668029-10124 RES-TFC 120K-OHM 1/16W J 0402- *** 200 021L612039-10125 RES TFC 330K-OHM 1/16W J 0402- *** 200 021L633039-10123 R100 RES-CF- 100--OHM 1/16W J 0402- 200PPM ASJ CR10-101-JT 021L210009-10224 R101 RES-TFC 56K--OHM 1/16W J 0402- *** 200...
  • Page 38 PART LIST MAIN PCB ASSEMBLY Ref.No. Description Mfr's Part No. R146 RES-CF- 5.6K-OHM 1/16W J 0402- 200PPM 021L256019-10226 R147 RES-CF- 5.6K-OHM 1/16W J 0402- 200PPM 021L256019-10226 R148 RES-CF- 12--KOHM 1/16W J 0402- 021L212029-10224 R149 RES-CF- 12--KOHM 1/16W J 0402- 021L212029-10224 R150 RES-TFC 22K--OHM 1/16W J 0402- *** 200 021L622029-10120...
  • Page 39 PART LIST MAIN PCB ASSEMBLY Ref.No. Description Mfr's Part No. R197 RES-TFC 22K--OHM 1/16W J 0402- *** 200 021L622029-10120 R198 RES TFC 2.7K-OHM 1/16W J 0402- *** 200 ROHS 021L627019-10122 R199 RES-TFC 4.7K-OHM 1/16W J 0402- 200PPM ASJ CR10-472-JT 021L247019-10225 R201 RES-TFC 33K--OHM 1/16W J 0402- *** 200 021L633029-10125...
  • Page 40 TM833USL/FNT HSG/E-M COMP COBRA/US/BLK/REV.0 A29P2730101L0001 002L240145-11004 SPK FLAT 8--OHM D40-H5.2 1---W TAIHEXING TEK404P-8 OHM1W ROHS CAB FNT MU COBRA TM833USL ABS BLK 3U2X ROHS 051L003472C012 LENS MAIN TM833USL COBRA PMMA ROHS 055L002777C012 PLAS PLATE-- PTT MOUNT PC BLK 3U2X TM832EUL ROHS 056L006978D011 INSU SHT- NYLON D37.3 TM832EUL SPEAKER FELT...
  • Page 41 BATTERY BOX SPONGE 42*8*1mm(SI NGLE COATED) 089L084201-90001 ALK BATTERY ASSEMBLY TM833USL/ALK BATT/E-M COMP/ COBRA/US/BLK/REV.0 A29P2730105L0005 CAB REAR ALK BATT TM833USL COBRA ABS BLK 3U2X ROHS 052L003065E019 INSU LABL 8B35 75.3*3.9*0.15MM TM833 ROHS 058L002967-012 CONT +VE PLATE B TM832EUL T02 PHOSPHOR COPPER GP ROHS 061L003057C014...
  • Page 42 RES MOF 0.22-OHM 1---W J AXL-- MO-100 D4.5XL11MM ROHS 021L402289-61905 RES MOF 0.1--OHM 1---W J AXL-- HK RESISTORS D4*11MM ROHS 021L200143-C0002 LED RECTA R/G 2V1 L7W5H3 JOYWON JW-S25709RG2-YG ROHS 015L009950-10004 TM833USL/CRADLE CHG/SMD/PCBA/ COBRA/US/BLK/REV.0 A29P4030109L0006 C101 CAP-CSM 0.1-U/K 25-V 0603--X7R 003L510446-10009 C102 CAP-CSM 0.01U/K 25-V 0603--X7R ROHS...
  • Page 43 005LTL431I-75911 PCB DS FR4- L70.1--W45.2--T10 CHA GP TM833USL REV.3 ROHS 116L2833US-USB33 CHARGER ASSEMBLY TM833USL/CRADLE CHG/E-M COMP/ COBRA/US/BLK/REV.0 A29P2730110L0002 CAB FNT CHG COBRA TM833USL ABS BLK 3U2X CM110-008 ROHS 051L003473D015 CAB REAR CHG TM832EUL ABS BLK 3U2X COBRA ROHS 052L003066C014 055L002779C020...
  • Page 44 088L230105-20002 PE PVC BAG:155*265MM(T0.05MM) 088L265155-20001 WRIST STRAP 123L250600-20004 BELT CLIP PACKING MATERIAL ASSEMBLY TM833USL/PKG MAT'L/BELT CLIP/ COBRA/US/BLK/REV.0 A29P1700105L0005 PLAS CLIP TOP ABS+PC BLK 3U2X TM832EUL ROHS 056L006992C019 PLAS CLIP BASE ABS+PC BLK 3U2X TM832EUL ROHS 056L006993C016 METAL AXLE FOR BELT CLIP S/S...
  • Page 45 PART LIST CHARGER PACKING MATERIAL ASSEMBLY Ref.No. Description Mfr's Part No. BAG PE 165*180MM FOR NC886G CHG ROHS 088L003395-019 TM886BEUG/PKG MAT'L/CHG SCREW/ COBRA/EUR/BLACK/REV.0 886P1702300L0000 SCREW TS D3.0L23 PH - + SH S/S ROHS 067L130235-50008 BAG PE 40X60MM T=0.04MM ROHS 088L060040-20009...

  • Page 46: Ic Lead Identification And Internal Diagram

    IC LEAD IDENTIFICATION AND INTERNAL DIAGRAM 4116 PIN FUNCTION 3. MIXER OUT 4. VCC 5. IF IN 6. BY PASS 7. FILTER OUTPUT 8. FILTER INPUT 9. AUDIO 10. DISCRIMINATOR 11. IF OUTPUT 12. RSSI 13. COMP OUTPUT 14. COMP INPUT 15.
  • Page 47 U SIT 8825 01- 090 DPLL Fin1 Fin2 OSC1 DATA OSCO 16TSSOP 3/ 10- 2904 PIN FUNCTION 1.A OUTPUT 2.A - INPUT 3.A +INPUT 4.GND 5.B +INPUT 6.B - INPUT 7.B OUTPUT...
  • Page 48 9032...
  • Page 49 U5-M38C29FFAHP60K...
  • Page 50 U6-XC61FC4012MR VOUT Delay Circuitry Vref 1. VOUT 2. VSS 3. VIN U7/U8/U9 NJM324...
  • Page 51 24 16 U12-XC6204B502MR...
  • Page 52 U13-74HC4053PW U14-NJM2070 BIAS +INPUT +INPUT -INPUT OUTPUT -INPUT OUTPUT 100K...
  • Page 53 U401-HT1621-DICE U402-ISD1730X-BONDING...

  • Page 54: Transistor Lead Identification

    TRANSISTOR LEAD IDENTIFICATION 3SK318 2SK302 1.Gate 1 2.Gate 2 1.Gate 2.Drain 3.Drain 3.Source 4.Source 4901 2SA1363 5066 1.Base 1.Emitter 2.Emitter 2.Collector 3.Collector 3.Base 2SA1577Q 2SK3078 1.Emitter 1.Gate 2.Source 2.Base 3.Collector 3.Drain 4097 2SK210Y Drain 1.Emitter Gate 2.Base 3.Collector Source...
  • Page 55 FMA A 2SK3476 1.Collector 2.Collector 1. Gate 3.Base Source heat sink 4.Emitter 5.Base 3. Drain PDTA143ZE PDTC143ZE handbook halfpage 1. Base 2. Emitter 3. Collector...

  • Page 56: Voltage Chart

    VOLTAGE CHART U1 BA4116FV 4.72 4.15 3.38 4.75 7.32 4.33 1.52 0.62 0.74 4.74 3.90 2.62 Rx(V) 0.94 Rx(V) U2 SIT8825B01 Fin 1 CP 1 Data OSCO OSC1 Rx(V) 4.85 4.89 3.01 4.94 5.00 3.70 4.08 4.78 GP 2 Fin 2 Rx(V) 4.89 4.89...
  • Page 57 VOLTAGE CHART-CONTINUED U8 NJM324V 1.76 1.76 1.74 4.89 1.74 1.76 1.76 1.76 1.76 1.75 1.75 Rx(V-HHF) Rx(V-HHF) 1.76 1.76 U9 NJM324V Tx(V) 2.13 2.14 2.13 4.92 2.45 2.48 2.48 2.13 2.13 2.13 2.45 2.45 2.41 Rx(V) U10 NJM2904V 1.72 1.72 1.72 1.72 1.72...
  • Page 58 VOLTAGE CHART-CONTINUED U401 HT1621-DICE Rx(V) 0.64 3.25 7.16 U01 MC34063AD-CHARGER Charger(V) 7.50 0.65 5.70 12.00 12.00 8.40 0.55 0.65 12.00 12.00 2.00 Standby(V) U02 S324-CHARGER Chargeing(V) 1.60 0.50 12.00 0.38 0.30 11.00 1.60 0.07 2.50 11.00 6.00 0.50 12.00 2.20 Standby(V) Chargeing(V) 2.50...
  • Page 59 VOLTAGE CHART-CONTINUED Q1 2SK3476 Q2 2SK3078 Tx(V-VHF Lo) 0.52 7.20 1.24 7.20 Tx(V-VHF Mid) 0.72 7.12 1.74 7.15 Tx(V-VHF Hi) 0.92 7.01 2.25 7.05 Rx(U-UHF Lo) 0.36 7.15 0.68 7.20 Rx(U-UHF Mid) 0.54 7.05 1.13 7.07 Rx(U-UHF Hi) 0.75 7.09 1.71 7.17 Q3 2SC4901YK...
  • Page 60 VOLTAGE CHART-CONTINUED Q15 3SK318 Q16 2SK302 Rx(V-VHF) 1.73 2.22 0.65 4.51 0.74 3.98 Q17 FMA8A-T148 Tx(V-VHF) 4.21 4.15 5.00 Rx(V-VHF) 3.98 4.04 5.00 Q18 FMA8A-T148 Rx(V-VHF) 5.00 4.88 0.00 5.00 Rx(V-VHF) 4.94 5.00 4.99 Q19 PDTA143ZE Rx(V-VHF) 5.00 4.98 Q20 2SK210Y Tx(V-VHF) 0.51 4.12...
  • Page 61 VOLTAGE CHART-CONTINUED Q25 PDTC143ZE Q26 PDTC143ZE Tx(V-UHF) 1.19 3.89 Q27 PDTC143ZE Tx(V-NOAA) 2.30 2.40 Q28 PDTC143ZE Mic Mute (V) 4.95 Q29 2SA1577 Tx(V) 5.00 5.00 Q31 2SA1577 Q34 2SC4097R Q35 2SC4097R Speaker On(V) 7.20 6.51 7.18 4.24 4.82 6.42 4.24 4.85 7.18 Q32 PDTC143ZE...
  • Page 62 VOLTAGE CHART-CONTINUED Q40 2SA1577 Q41 2SC5066 Tx(V-UHF) 4.98 4.20 4.72 0.90 0.43 Q39 2SA1577 Tx(V-UHF) 4.98 4.20 4.53 CHARGER Q01 MMBT3904LT1 Q1 BSP613P Q02 MMBT3904LT1 Chargeing(V) 1.70 12.00 2.50 12.00 10.00 8.20 9.00 10.00 12.00 Standby(V) 12.00 12.00 7.40 12.00 3.90 7.40 12.00...

  • Page 63: Schematic Diagram

    SCHEMATIC DIAGRAM MAIN CLONE C140 OSCO OSCI MUTE Fin2 Fin1 ALERT R139 ) REC HVU307 MUTE BUSY 2.2uH HVU307 SCLK E 235 2.2uH R124 TXPOW TXPOW E 235 UMOD E 235 KEY2 KEY1 TIS1 BATT POWER TXPOW CNVss RESET TIS4 RESET &...
  • Page 64 SCHEMATIC DIAGRAM-LCD MISO MOSI DATA INT /...
  • Page 65 SCHEMATIC DIAGRAM CHARGER...

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