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Yaesu FT-2500M Technical Supplement

Mil-spec 2-m fm transceiver
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Summary of Contents for Yaesu FT-2500M

  • Page 2: Table Of Contents

    ... 4C MH-27 ABJ Microphone ..4D-1 ,-------------------------- ---, FT-2500M Cut out the label at the right and place it behind the clear plastic window in Technical Supplement the spine of the manual binder.
  • Page 3 The FT-2500M is Yaesu's new successor to the CALL channel. Channel steps are user-selectable famous FT-2400H, the industry's first amateur from 5 to 50 kHz, and Automatic Repeater Shift transceiver designed to meet rugged U.S. mili­ can set standard repeater shifts when you tune to tary specifications for shock and vibration (MIL­...

  • Page 4: Specifications

    Selectivity (-6/-60 dB): 12/30 kHz IF Rejection: better than 70 dB Image Rejection: better than 70 dB Maximum AF Output: 3.5 W into 4 ohms @10% T HD Specifications are subject to change without notice or obligation. FT-2500M Technical Supplement...

  • Page 5: Chip Component Information

    Chi p Component Information The diagrams below indicate some of the distinguishing features of common chip com­ ponents. Capacitors (Unit: mm) Type 3216 1. 6 0.45�0.60 2125 1. 25 0.35�0.50 1608 1. 6 0.65�0.95 Tantalum Capacitors Type 1/lOW, l/16W 1 00 , 222 , 47 3 ······ Marking* Resistors Type...
  • Page 7 Chip Component Information Install a Replacement Chip As the value of some chip components is not indicated on the body of the chip, be careful to get the right part for replacement. Apply a small amount of solder to the land on one side where the chip is to be installed.
  • Page 8 Notes FT-2500M Technical Supplement...
  • Page 9 Circuit Descripton Receive Signal Path (TDA2003H) up to 2 watts for the optional head­ phone jack or 8-ohm loudspeaker. Incoming RF from the antenna jack is deliv­ ered to the Main Unit and passed through a low­ Squelch Control pass filter and a %-wave antenna switching &...

  • Page 10: Circuit Description

    Q1009 and Ql010, so as to maintain stable The 5-kHz (or 6.25-kHz) signal from the pro­ high, medium or low output power under vary­ grammable divider (derived from the VCO) and ing antenna loading conditions. that derived from the crystal are applied to the FT-2500M Technical Supplement...
  • Page 11 Circuit Description phase detector section of Q1024, which produces plifiers Q1009 and Q1010, disabling the transmit­ a dual 5-V pulsed output with pulse duration ter. depending on the phase difference between the input signals. This pulse train is converted to DC Miscellaneous Circuits by charge pump Q1026/Q1027 (IMX5/IMZ2), &...
  • Page 13 r------ ----- ---. LCD KEY/DIAL PLL CLONE 01001. 25. 16 Ql 001 Q1002. 3 Q1006 Q2011 Q2001-3. -4 t.1130Bx2 3SK131 2SK302GRx2 IMH5 IMH5 NJM2902Mx2 Ut.1 9 415 RF AMP 1 ST Ml X BUSY SW PO ADJ SW CTR STOP T/R ANT SW H/M/L •...
  • Page 15 1----------------, 1-----------------, r--------------, MAIN-UNIT F3427000 CNTL-UNIT F3426101 DI SP-UN IT F34261 02 T9206352A w 1 �B ��sY J2oos J30o 1 � J1003 P0090833 J2007 P1090838 S-METER S-METER SCAN STOP ------ DISC OUT DISC OUT MIC-UN IT NOISE INPUT NOISE INPUT 1-V!.1/L F3426103 13.SV S\VED...

  • Page 19: Case Disassembly & Pcb Access

    VOL, SQL and dial knobs by servicing for a period of several years, however, gently pulling them outward. to replace the cell, order Yaesu P I N Q9000552. First note the location and tab polarity of BT2001, mounted over the CNTL Unit micro­...
  • Page 20 Fig. Audio Component Location 2 RX If you want to use your FT-2500M with a 9600- baud Packet TNC, the following modification If you are not confident at surface mount soldering, should enable better performance at this higher do not attempt the modification, and contact your data rate.
  • Page 21 CNTL Unit. Be sure to insulate any spliced leads with heat-shrink tubing or electrical tape. 02018 AF Buff e r Amp. ····�·.;.:.:.;"Moo(ii'Aii..1 N" i': Approx. 2Vp-p : ....�����---····_; Fig. TNC DATA IN/OUT Lead Connections FT-2500M Technical Supplement...

  • Page 22: Channel Display-Only Mode

    Repeat this step to return the transceiver to normal. 2-4 -- -- -- -- -- -- -- -- -- -- -- -- -- - FT-2500M Technical Supplement...

  • Page 23: Alignment

    Alignment The FT-2500M has been carefully aligned at equipped for repair and alignment. Therefore, if the factory for the specified performance across a fault is suspected, contact the dealer from the amateur band. Realignment should therefore whom the transceiver was purchased for instruc­...

  • Page 24: Pll & Transmitter

    After completing one step, read the following step to determine whether the same test equip­ ment will be required. If not, remove the test equipment (except dummy load and wattmeter, if connected) before proceeding. FT-2500M Technical Supplement...

  • Page 25: Pll Reference Frequency

    Alignment PLL & Transmitter Alignment Points Set the transceiver to the 17 4.000 MHz*, and Panel Power Adjustment Power Output adjust coil L303 on the VCO Unit for 7.5 V on Selection the voltmeter. High VR2005 50±5W *For transceiver versions without extended receive 146.000 MHz L303 capability, tune to...

  • Page 26: Receiver

    T 1 00 1 T 1 002 T 1 003 T 1 004 VR2007 T 1 006 T P200 1 ( - ) T P2002 ( + ) J 1 003 Pin? VR2006 VR 1 00 1 FT-2500M Technical Supplement...

  • Page 27: Vcounit

    M O D RX /TX component side chip-only side Em itter 1 Base 1 Emitter Collector Collector Collector 1 Collector Base Emitter Base Emitter Base I M H5 ( H5) DTC1 24EK (25) 2SC2759 ( U22) ( 0304) (0302) ( 0305) 2SC3356 (R24) ( 030 1 ,303) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ,...
  • Page 29 VCO Unit REF. DESCR I PT I ON VALUE TOL. MFGR ' S DES I G YAESU P/N VERS. ------ ----- -------- -------- ---- -------- ------ VCO UN I T * * * PCB W i th Components CA 1305001...
  • Page 30 Q5000037 TP0302 TP-H MK- 1 0 160 Q5000037 TP0303 TP-H MK- 1 0 160 Q5000037 TP0304 TP-H MK- 1 0 1 60 Q5000037 TP0305 TP-H MK- 1 0 1 60 Q5000037 SHI ELD CASE R0 1 36240B FT-2500M Technical Supplement...
  • Page 31 MA I N-UN I T F3427DDO + 13.7dBµ 4.6V + 15.6dBµ 0 1 008 X 1 00 1 4.0V - 3.6V 3.BV :SOL CLOSE SOL OPEN 0 1 008 455kHz 0 1 008 455kHz Pin 7 0 1 008 0 1 008 1 kHz Pin 9 0 1 024...
  • Page 33 M6778 1 L ( 0 1 009) TDA2003H A N 6541 ( 0 1 023) ( 0 1 0 1 3 ) I \' - Emitter E m itter Collector "- Col lector Base Base 2S B 1 1 43S 2SC2053 ( 0 1 0 1 5, 1 0 1 9 ) ( 0 1 0 1 0 )

  • Page 35: Mainunit

    MAIN Unit TOL. MFGR ' S DES I G YAESU P/N REF. DESCR I PT I ON VALUE VERS. ----- ---- ---- - - - - - - - - - - - - MA I N UN I T...
  • Page 36 0. luF GRM40B1 04M25PT K221 408 1 1 1 1 17 AL. ELECTRO. CAP. 470uF RE2- 16V471 M K40 129049 1 1 1 8 AL. ELECTRO. CAP. l OOOuF 1 6V RE3- 16V1 02MS K40 129067 38-6 FT-2500M Technical Supplement...
  • Page 37 DESCR I PT I ON VALUE TOL. MFGR ' S DES I G YAESU P/N VERS. - - - - - - - - - - - - - - - - - - - - - - - -...
  • Page 38 2SB1 143S G32 1 1 430S Q 1 020 TRANS I STOR DTA 143EK T 146 G30700 1 0 Q 1 0 2 1 TRANS I STOR I MH5 T 1 08 G3070027 3 8 - 8 FT-2500M Technical Supplement...
  • Page 39 DESCR I PT I ON VALUE TOL. MFGR ' S DES I G YAESU P/N VERS. - - - - - - - - - - - - - - - - - - - - - - - -...
  • Page 40 1 / l OW 5% RMC l/ lOT 6 8 1 J J2420568 1 R 1 1 20 CH I P RES. 1. SK 1 / l OW 5% RMC l / l OT 1 82J J24205182 3B-10 FT-2500M Technical Supplement...
  • Page 42 Notes...

  • Page 43: Mic Unit

    (.!) a... « To DISPLAY JP3001 Unit (See Page JE-1 ) MFGR ' S DES I G YAESU P/N VERS. REF. DESCR I PT I ON VALUE TOL. - - - - - - - - - - - - - -...
  • Page 47 CNTL Unit Pin 60 Emitter '- Collector Bose 2S B1 1 40S ( 02 0 1 6) Ground "- 2SB 1 1 43S SC418082CFU L7805 Input (02004) (02006) ( 02 0 1 2 ) Ground Ground O U T N J M2902M RH5VA45AA ( 05 ) Input N J M78L05UA...

  • Page 49: Cntl Unit

    CNTL Unit REF. DESCR I PT I ON VALUE TOL. MFGR ' S DES I G YAESU P/N VERS. ---- -------- ------ ---- ------ ---- - - - - - CNTL UN I T PCB W i th Components CA 1 25800 1...
  • Page 50 DTC 1 14EK T96 G3070002 Q Z003 TRANS I STOR DTC 1 14EK T96 G3070002 Q 2004 TRANSI STOR 2SB 1 143S G32 1 1430S Q 2005 TRANS I STOR 2SC27 1 ZGR TE85R G3327 1 Z7G 30-6 FT-2500M Technical Supplement...
  • Page 51 DESCR I PT I ON VALUE TOL. MFGR ' S DES I G YAESU P/N VERS. - - - - - - - - - - - - - - - - - - - - - - - -...
  • Page 52 VR2003 POT. EVN-DXAA03B 14 J5 1783103 VR2004 POT. EVN-DXAA03B23 J51 783202 VR2005 POT. EVN-DXAA03B1 4 J5 1783103 VR2006 POT. EVN-DXAA03B54 J5 1783503 VR2007 POT. EVN-DXAA03B24 J5 1 783203 RUBBER SPONGE R7139760 SEAL R8 1 1 8690 30-8 FT-2500M Technical Supplement...
  • Page 53 � - 4.6V J2005 - 2.7V Unit To CNTL J2006 ( See Page 3 0-1 ) Unit To CNTL (See Page 30-1 ) 0300 1 Pin 55 57kHz r - - - - - - - - - - - - - - J3001 P 1 090653 CALL...

  • Page 57: Display Unit

    DISPLAY Unit REF. DESCR I PT I ON VALUE TOL. MFGR ' S DES I G YAESU P/N VERS. --------------- -------- ---- ----- ---- ---- ------- - - - - - - D I SPLAY UN I T PCB W i th Components (W/0 L I GHT GU I DE (2pcs) ,...
  • Page 58 L I GHT GU I DE R3520080 L I GHT GU I DE R7 139670A REFLECTOR R7140070 SHEET (A) R7 149850 SHEET S6000236 LH-5-3 LED SPACER (2pcs) S6000242 LH-5-9 LED SPACER S6000314 NRP-380 NYLON R I VET 3E-6 FT-2500M Technical Supplement...

  • Page 59: Frc-6 Dtmf Paging Unit

    1 . OUT 2 . R/W 3 . cs 4 . RSO 6 . IRQ/CP . DO 8 . Dl 1 0 . 03 1 1 . GND 1 2 . 1 3 . IN 1 4 . N. C. connector side solder side "-...
  • Page 60 CH I P RES. 1 / l OW RMC l/lOT 103J J2420 5 1 03 VRO l O l POT. EVM-1 USX30BQ447KB J51 789473 0 1 0 1 XTAL 3. 579545MHz H01 03055 RUBBER SPONGE R7 139760 FT-2500M Technical Supplement...

  • Page 61: Fts-17A Ctcss T One Squelch Unit

    connector side solder side Cathode 1.2 P in 4 0 Pin 21 Pin 16 � � Anode 1 Anoda 2 MX365LH 1 SS30 1 ( 83) ( 0 1 0 1 ) ( 0 1 0 1 ) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - C 1 0S C 1 0.( Q .
  • Page 62 CH I P RES. 330K RMC l / 1 6 822JATP J24 1 85822 8. 2K 1 / 1 6W R 0 1 04 CH I P RES. J5 1789473 EVM-1USX30BQ447KB VR0 1 0 1 POT. R71 30200 SPONGE 4B-2 FT-2500M Technical Supplement...
  • Page 63 REF. DESCR I PT I ON VALUE TOL. MFGR ' S DES I G YAESU P/N VERS. --------- - - - - - - - - - - - - - - - - - - - - - -...
  • Page 65 S8100227 C U RL CORD W/ P L U G Specifications Micropone Impedance: 1.5kQ + 60°C Operating Temperature Range: l0°C � Voltage Requirement: 4.8V 5.2V � D/MR & P Button N.C. 3. PTT Butt on MicTx At.dio 6. + 5V 7.
  • Page 67 YAE S U Per f ormance without compromise. Copyright © No portion of this manual 1994 aesu Musen Co., Ltd. may be reproduced right reserved. without the permission of Yaesu Musen Co. , Ltd. Printed in Japan. E06519000 (4080-AY)

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