50/144/430 MHz Triple-Band Heavy Duty Submersible Transceiver VERTEX STANDARD CO., LTD. 4-8-8 Nakameguro, Meguro-Ku, Tokyo 153-8644, Japan VERTEX STANDARD US Headquarters 10900 Walker Street, Cypress, CA 90630, U.S.A. International Division 8350 N.W. 52nd Terrace, Suite 201, Miami, FL 33166, U.S.A. Technical Supplement ©2002 VERTEX STANDARD CO., LTD. Printed in Japan. EH009M90A VX-7R YAESU EUROPE B.V. P.O. Box 75525, 1118 ZN Schiphol, The Netherlands YAESU UK LTD. Unit 12, Sun Valley Business Park, Winnall Close Winchester, Hampshire, SO23 0LB, U.K. VERTEX STANDARD HK LTD. Unit 5, 20/F., Seaview Centre, 139-141 Hoi Bun Road, Kwun Tong, Kowloon, Hong Kong Introduction This manual provides the technical information necessary for servicing the VX-7R 50/144/430 MHzTriple-Band Heavy Duty Submersible Transceiver. Servicing this equipment requires expertise in handing surface-mount chip components. Attempts 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. Two PCB layout diagrams 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, and the other has either a mixture of both chip and leaded components (trimmers, coils, electrolytic capacitors, ICs, etc.), or leaded components only. While we believe the information in this manual to be correct, VERTEX STANDARD assumes no liability for damage that 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 appreciated. DW Contents Specification .................................................................................................................................... 2 Exploded View & Miscellaneous Parts ........................................................................................ 4 Block Diagram ................................................................................................................................. 5 Interconnection Diagram ............................................................................................................... 6 Circuit Description ........................................................................................................................ 7 Alignment ...................................................................................................................................... 11 Board Unit (Schematics, Layouts & Parts) RF Unit .................................................................................................................................................................... 19 AF Unit .................................................................................................................................................................... 33 CNTL Unit .............................................................................................................................................................. 43 VCO Unit ................................................................................................................................................................ 53 1 General Specifications Frequency Ranges: Rx (MAIN): 0.5 - 1.8 MHz (BC Band) 1.8 - 30 MHz (SW Band) 30-59 MHz (50 MHz HAM: USA version) 30-76 MHz (50 MHz HAM: EXP version) 59-108 MHz (FM: USA version) 76-108 MHz (FM: EXP version) 108-137 MHz (Air Band) 137-174 MHz (144 MHz HAM) 174-222 MHz (VHF-TV) 222-225 MHz (220 MHz HAM: USA version) 225-420 MHz (ACT1: Action Band 1: USA version) 222-420 MHz (ACT1: Action Band 1: EXP version) 420-470 MHz (430 MHz HAM) 470-729 MHz (UHF-TV: USA version) 470-800 MHz (UHF-TV: EXP version) 800-999 MHz (ACT2: Action Band 2, cellular Blocked) Rx (SUB): 50 - 54 MHz 137 - 174 MHz 420 - 470 MHz Tx: 50 - 54 MHz (MAIN & SUB) 144 - 146 MHz or 144 - 148 MHz (MAIN & SUB) 222-225 MHz (MAIN, USA version) 430 - 440 MHz or 430 - 450 MHz (MAIN & SUB) 5/9/10/12.5/15/20/25/50/100 kHz ±5 ppm (+14°F to +122°F, ­10°C to +50°C) F2, F3, A3 50-ohm Nominal: 7.4 V DC, Negative Ground Operating: 10 - 16 V DC, Negative Ground (EXT DC jack) 150 mA (Mono Band Receive) 200 mA (Dual Band Receive) 55 mA (Mono Band Receive, Standby, Saver Off) 100 mA (Dual Band Receive, Standby, Saver Off) 25 mA (Mono Band Receive, Standby, Saver On "Save Ratio 1:5") 50 mA (Dual Band Receive, Standby, Saver On "Save Ratio 1:5") 400 µA (Auto Power Off) 1.6/1.3/1.0/0.7 A (50 MHz, Tx HI/L3/L2/L1) 1.71.4/1.1/0.8 A (144 MHz, Tx HI/L3/L2/L1) 0.6 A (220 MHz, Tx) 1.8/1.5/1.2/0.9/ A (430 MHz, Tx HI/L3/L2/L1) ­4°F to +140°F (­20°C to +60°C) 60 (W) x 90 (H) x 28 (D) mm (w/o knob & antenna) 250 g Channel Steps: Frequency Stability: Emission Type: Antenna Impedance: Supply Voltage: Current Consumption: Operating Temperature: Case Size: Weight: 2 Transmitter Specifications 5/2.5/1.0/0.5 W (50/144/430 MHz, FM) 0.3 W (220 MHz, FM) 1.0 W (50 MHz, FM) FM: Variable Reactance AM: Early Stage (Low Level) ±5/±2.5 kHz At least 60 dB below (@ Tx 1W) 2 k-ohm RF Power Output: Modulation Type: Maximum Deviation: Spurious Emission: Microphone Impedance: Receiver Circuit Type: Intermediate Frequencies: Sensitivity: Selectivity: AF Output: N-FM, AM: Double-Conversion Superheterodyne W-FM: Triple-Conversion Superheterodyne 1st: 47.25 MHz (N-FM, AM) 45.8 MHz (W-FM) 2nd: 450 kHz (N-FM, AM) 10.7 MHz (W-FM) 3rd: 1 MHz (W-FM) 3.0 µV for 10 dB SINAD (0.5 - 30 MHz, AM) 0.5 µV for 12 dB SINAD (30 - 50 MHz, N-FM) 0.16 µV for 12 dB SINAD (50 - 54 MHz, N-FM) 15 kHz/35 kHz (-6 dB/-60 dB: N-FM, AM) 200 kHz/300 kHz (-6 dB/-20 dB: W-FM) 200 mW @ 8 ohm for 10 % THD (@ 7.4V DC) 400 mW @ 8 ohm for 10 % THD (@ 13.8V DC) Specifications are subject to change without notice, and are guaranteed within amateur bands only. 3 Exploded View & Miscellaneous Parts RA0417100 PANEL FRAME RA03995000 WINDOW RA03994000 DOUBLE FACE TAPE RA0401600 O RING RA0399800 LIGHT GUIDE (LED) Â Â Â Â No. VXSTD P/N À U9900137 Á U9900138 Â U07225120 Ã U9900136 Ä RA0304300 Å U00103002 Æ U00104002 Ç U9900140 È U44104002 É U9900141 U07125102 DISCRIPTION BINDING HEAD SCREW M2X21.7 (W/ O RING) BINDING HEAD SCREW M2X5 (W/ O RING) PAN HEAD SCREW M2X2.5SUS#1 SPECIAL SCREW M2X2.35 WASHER PAN HEAD SCREW M2X3NI PAN HEAD SCREW M2X4NI TAPTITE SCREW M2X6SUS#3 TAPTITE SCREW M2X4NI TAPTITE SCREW M1.7X5NI#3 TAPTITE SCREW M1.7X2.5SUS#1 QTY. 2 4 4 1 1 1 6 2 4 2 2 CP7346002 (USA) CP7346003 (EXPORT) CP7346004 (GERMANY) PANEL ASS'Y with RUBBER KNOB, MIC SHEET, SP SHEET, SP, PROTECTOR L, PROTECTOR R RA0400000 RUBBER PACKING Q7000426 LCD MODULE RA0399100 LIGHT GUIDE (LED) RA0405600 MIC HOLDER RUBBER RA014250A DOUBLE FACE TAPE (LCD) RA0399900 REFLECTOR SHEET È CNTL-Unit È Æ AF-Unit È É È É Æ Æ Æ FR008330C FPC CABLE There is a direction in WASHER. SCREW WASHER EXP CAP RA0426800 O RING RA0400900 O RING RA0400500 EXT CAP RA0292200 SPECIAL NUT RA0426900 O RING RA0087900 SPECIAL NUT RA0400200 STUD (X4 pcs) ÆÆ Ã Ä Á ÇÇ Å RA01403AA LATCH NAIL CP7342003 REAR CASE ASS'Y with SMA CONNECTOR ASS'Y, TERMINAL BOARD ASS'Y, RUBBER KNOB (PTT), RUBBER KNOB (PTT) Á Á Á RA0399700 HOLDER (PTT) RA0401200 ENCODER KNOB RA0401900 VOLUME KNOB RA0400600 CAP(SP/MIC) À À RA0400100 RUBBER KNOB (PTT) RA0140100 MASK SHEET RA0141600 RUBBER PACKING FNB-80LI 4 Block Diagram 5 Interconnection Diagram 6 Circuit Description The VX-7R consists of a RF-UNIT, a CNTL-UNIT and an AF-UNIT. The RF-UNIT contains the receiver front end, PLL IC, power and switching circuits, and the VCOUNIT for transmit and receive local signal oscillation. The CNTL-UNIT contains the CPU, and audio ICs, and the power circuitry for the LCD. The AF-UNIT contains the IF, and audio ICs. filter characteristics are provided for each specific operating frequency. (3) 435-MHz Band and 222-540MHz Reception Received signals between 222 and 540 MHz pass through the Triplexer circuit, low-pass filter/high-pass filter circuit, UHF T/R switch circuit and protector diode D1001 (1SS362) before additional filtering by a bandpass filter prior to application to RF amplifier Q1003 (2SC5555). The amplified RF signal is passed through a band-pass filter, RF amplifier Q1006 (2SC5555) and band-pass filter to first mixer Q1011 (2SC5555). Meanwhile, UHF output from the VCO-UNIT is amplified by Q1016 (2SC5374) and applied through diode T/R switch D1045 (HN2D01FU) to mixer Q1011 as the first local signal. The 47.25-MHz intermediate frequency product of the mixer is delivered to the AF-UNIT. The TUNE voltage from the CPU on the CNTL-UNIT is amplified by DC amplifier Q3017 and applied to varactors D1005, D1018, D1030 and D1031 (HVC358B) in the variable frequency band-pass filters. By changing the electrostatic capacitance of the varactors, optimum filter characteristics are provided for each specific operating frequency. (4) 50-MHz-Band and 30-76 MHz Reception Received signals between 30 and 76 MHz pass through the Triplexer circuit, low-pass filter circuit, 50 MHz T/R switch circuit and protector diode D1003 (1SS362) before additional filtering by a band-pass filter prior to application to RF amplifier Q1005 (2SC5555). The amplified RF signal is passed through a band-pass filter to first mixer Q1008 (2SC5555). Meanwhile, 50 MHz output from the VCO-UNIT is amplified by Q1018 (2SC5374) and applied through diode T/R switch D1046 (HN2D01FU) to mixer Q1008 as the first local signal. The 47.25-MHz intermediate frequency product of the mixer is delivered to the AF-UNIT. The TUNE voltage from the CPU on the CNTL-UNIT is amplified by DC amplifier Q3017 and applied to varactors D1025 and D1026 (1SV325) in the variable frequency band-pass filters. By changing the electrostatic capacitance of the varactors, optimum filter characteristics are provided for each specific operating frequency. Receiver Signal Flow The VX-7R includes five receiver front ends, each optimized for a particular frequency range and mode combination. (1) Triplexer Signals between 0.5 and 540 MHz received at the antenna terminal pass through a first low-pass filter composed of C1266, C1269, C1289, C1291, C1296, C1297, L1059, L1060, L1067 and L1068. Received 430-MHz signals, after passing through the low-pass filter, are fed to the UHF T/R switch circuit composed of diode switch D1048 (RLS135), D1051 (1SV307). Received 145-MHz signals, after passing through the low-pass filter, are fed to the VHF T/R switch circuit composed of diode switch D1053 (RLS135), D1054 (1SV307). Received 50-MHz signals, after passing through the low-pass filter, are fed to the 50MHz T/R switch circuit composed of diode switch D1058 (RLS135), D1059 (1SV307). (2) 145-MHz Band and 76-300MHz Reception Received signals between 76 and 300 MHz pass through the Triplexer circuit, low-pass filter/high-pass filter circuit, VHF T/R switch circuit and protector diode D1002 (1SS362) before additional filtering by a band-pass filter prior to application to RF amplifier Q1004 (2SC5555). The amplified RF signal is passed through a band-pass filter to first mixer Q1012 (2SC5555). Meanwhile, VHF output from the VCO-UNIT is amplified by Q1017 (2SC5374) and applied through diode T/R switch D1041 (DAN222) to mixer Q1012 as the first local signal. The 47.25-MHz intermediate frequency product of the mixer is delivered to the AF-UNIT. The TUNE voltage from the CPU on the CNTL-UNIT is amplified by DC amplifier Q3017 (NJU7007F2) and applied to varactors D1020 and D1022 (HVC369B), D1019, D1021, D1023, D1024, D1033 and D1036 (1SV325) in the variable frequency band-pass filters. By changing the electrostatic capacitance of the varactors, optimum 7 Circuit Description (5) 0.5 - 30 MHz Reception Received signals between 0.5 and 30 MHz pass through the Triplexer circuit, low-pass filter circuit, HF T/R switch circuit and protector diode D1003 before additional filtering by a band-pass filter prior to application to RF amplifier Q1009 (2SC4915-0). The amplified RF signal is passed through a band-pass filter to first mixer Q1013 (2SC4915-0). Meanwhile, HF output from the VCOUNIT is amplified by Q1018 and applied through diode T/R switch D1046 to mixer Q1013 as the first local signal. The 47.25-MHz intermediate frequency product of the mixer is delivered to the AF-UNIT. The TUNE voltage from the CPU on the CNTL-UNIT is amplified by DC amplifier Q3017 and applied to varactors D1013 (HVR100) in the variable frequency bandpass filters. By changing the electrostatic capacitance of the varactors, optimum filter characteristics are provided for each specific operating frequency. (6) 540 - 999 MHz Reception Received signals between 540 and 999 MHz pass through the high-pass filter circuit, T/R switch D1004 (1SV271) prior to application to RF ampl ...