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Standard Horizon HX280S Service Manual

Vhf fm marine transceiver
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See also: Owner's Manual
VHF FM Marine Transceiver
HX280S/E
SERVICE MANUAL
HX280S
HX280E
EM038N90A
1

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Summary of Contents for Standard Horizon HX280S

  • Page 1 VHF FM Marine Transceiver HX280S/E SERVICE MANUAL HX280S HX280E EM038N90A...

  • Page 2: Important Note

    Measured in accordance with TIA/EIA-603. Important Note The HX280S and HX280E was assembled using Pb (lead) free solder, based on the RoHS specification. Only lead-free solder (Alloy Composition: Sn-3.0Ag-0.5Cu) should be used for repairs performed on this appara- tus. The solder stated above utilizes the alloy composition required for compliance with the lead-free specification,...
  • Page 3 Specifications (HX280E) General Frequency Ranges: 156.025 MHz - 162.000 MHz Channel Spacing: 25 kHz Frequency Stability: ±5 ppm (–20 °C to +60 °C) Emission Type: 16K0G3E 50 Ω Antenna Impedance: Supply Voltage: 7.4V DC, Negative Ground (Battery Terminal) Current Consumption: 320 mA (Receive, Typical at AF MAX.) 50 mA (Standby) 1.6 A / 0.7 A (TX: 5 W / 1W)

  • Page 4: Exploded View & Miscellaneous Parts

    Exploded View & Miscellaneous Parts CP9402001 (HX280S: USA) CP9402002 (HX280S: EXP) CP9402003 (HX280E: EU) RA0905300 CP9402004 (HX280E: UK) COIL SPRING (C065) FRONT PANEL ASSY RA1079100 LATCH NAIL RA1079200 RA1078700 LATCH PLATE KNOB (VOL) RA1078800 HOLDER (PTT) RA1079600 RUBBER KNOB (PTT)
  • Page 5 Block Diagram...
  • Page 6 Note...

  • Page 7: Circuit Description

    Circuit Description 1. Receive Signal Path 3. Squelch Control Incoming RF from the antenna jack passes through a low- The squelch circuitry consists of a noise amplifier and pass filter consisting of coils L1001, L1002, & L1004, ca- band-pass filter and noise detector within Q1026 pacitors C1005, C1014, C1015, &...

  • Page 8: Pll Frequency Synthesizer

    Circuit Description 4-1 Automatic Transmit Power Control The 25.0 kHz signal from the programmable divider (de- rived from the VCO) and that derived from the reference Current from the final amplifier is sampled by C1011 & oscillator are applied to the phase detector section of C1022, and R1004 &...

  • Page 9: Required Test Equipment

    Alignment The HX280S/E has been carefully aligned at the factory Required Test Equipment for the specified performance across the marine band. RF Signal Generator with calibrated output level at 200 MHz Realignment should therefore not be necessary except in Frequency Counter: >0.1 ppm accuracy at 200 MHz the event of a component failure.

  • Page 10: Before Alignment

    Alignment Before Alignment Main Reference Frequency Adjustment Install the HX280 Service Flag Controller Program to Turn the Antenna switch to the “TX Alignment” side. Remove the solder jumper JP1001. your computer. Remove the Front Panel from the transceiver accord- Set the channel to CH16. Use the [ H/L ] key to set the transceiver to “LOW”...

  • Page 11: Tx Deviation Adjustment

    Connect the DC voltmeter to TP1018, adjust VR1005 Select the COM port number which is connected to so that DC voltmeter reading is 0.2 V ± 0.02 V (HX280S) the HX280 Alignment Jig. or 0.45 V ± 0.02 V (HX280E).
  • Page 12 Note...
  • Page 13 MAIN Unit Circuit Diagram RF AMP 1st Mixer IF AMP 2nd Mixer / IF Q1015 Q1022 Q1024 Q1026 RX: 2.54 V RX: 0 V RX: 4.18 V RX: 3.53 V TX: 0 V TX: 0.82 V TX: 0 V TX: 0 V RX: 4.67 V TX: 0 V RX: 1.82 V...
  • Page 14 MAIN Unit Note...
  • Page 15 MAIN Unit Parts Layout (Side A) μPD78F0484GK LM2904PWR DTC143ZE (E23) DTC144EE (26) VMZ6.8NT2L (6C) (Q1025) (Q1004) (Q1035) (Q1020, 1036) (D1024)
  • Page 16 MAIN Unit Parts Layout (Side B) BA4116FV LM2902PWR BR24L08FVT 2SA1774 (FR) 2SC4617 (BR) 3SK294 (UV) DTC144EE (26) RQA0004PXDQS (PX) SN74LVC1G66 UMD5N DA221 (K) IMN10 (N10) (Q1026) (Q1005) (Q1027) (Q1017, 1031) (Q1014, 1018) (Q1022) (Q1006, 1029, (Q1013) (Q1034) (D1019) (D1020) (Q1010, 1011) 1030) LV2105V NJM12902V...

  • Page 17: Main Unit

    Parts List DESCRIPTION VALUE TOL. MFR'S DESIG VXSTD P/N VERS. LOT SIDE LAY ADR PCB with Components (No adjustment. Requires the adjustment for use.) CB4645001 HX280S CB4645002 HX280E Printed Circuit Board FR019200C C 1001 CHIP CAP. 0.001uF GRM155B11H102KA01D K22178809 C 1004 CHIP CAP.
  • Page 18 C 1099 CHIP CAP. 10pF TMK105CH100D-F K22148214 C 1100 CHIP CAP. GRM1552C1H6R0DZ01D K22178208 HX280E C 1100 CHIP CAP. TMK105CH040C-F K22148208 HX280S C 1102 CHIP CAP. 6.3V GRM155B30J105KE18D K22088803 C 1104 CHIP CAP. GRM1552C1H8R0DZ01D K22178210 C 1105 CHIP CAP. 0.001uF GRM155B11H102KA01D...
  • Page 19 MAIN Unit Parts List DESCRIPTION VALUE TOL. MFR'S DESIG VXSTD P/N VERS. LOT SIDE LAY ADR C 1160 CHIP CAP. 0.1uF GRM155B11A104KA01D K22108802 C 1161 CHIP TA.CAP. 22uF 6.3V TEESVA0J226M8R K78080047 C 1162 CHIP CAP. 0.1uF GRM155B11A104KA01D K22108802 C 1163 CHIP CAP.
  • Page 20 L 1016 M.RFC 0.056uH C1608CB-56NG-RF L1691041 L 1017 M.RFC 0.18uH C1608CB-R18G-RF L1691102 HX280E L 1017 M.RFC 0.22uH C1608CB-R22G-RF L1691103 HX280S L 1018 M.RFC 0.1uH HK1608 R10J-T L1690528 L 1019 M.RFC 0.068uH HK1608 68NJ-T L1690526 L 1021 M.RFC 0.039uH C1608CB-39NG-RF L1691039 L 1022 M.RFC...
  • Page 21 Parts List DESCRIPTION VALUE TOL. MFR'S DESIG VXSTD P/N VERS. LOT SIDE LAY ADR Q 1029 TRANSISTOR DTC144EE TL G3070075 Q 1030 TRANSISTOR DTC144EE TL G3070075 Q 1031 TRANSISTOR 2SA1774 TL R G3117748R Q 1032 TDA2822D013TR G1091542 Q 1033 TRANSISTOR FMMTL718TA G3070335 Q 1034...
  • Page 22 R 1120 CHIP RES. 120k 1/16W RMC1/16S 124JTH J24189050 HX280E R 1120 CHIP RES. 100k 1/16W RMC1/16S 104JTH J24189049 HX280S R 1121 CHIP RES. 2.2k 1/16W RMC1/16S 222JTH J24189029 R 1122 CHIP RES. 1/16W RMC1/16S 220JTH J24189005 R 1123 CHIP RES.
  • Page 23 0.5% MCR01MZPD3302 J24189380 R 1197 CHIP RES. 1/16W 0.5% MCR01MZPD1502 J24189376 HX280E R 1197 CHIP RES. 1/16W 0.5% MCR01MZPD2702 J24189379 HX280S R 1198 CHIP RES. 4.7k 1/16W 0.5% MCR01MZPD4701 J24189370 HX280E R 1198 CHIP RES. 1/16W 0.5% MCR01MZPD1502 J24189376 HX280S R 1199 CHIP RES.
  • Page 24 MAIN Unit Note...

  • Page 25: Charger Cradle

    CD-46 Charger Cradle Exploded View RA1088800 CASE (CHARGER) CHARGER UNIT : When removing the Charger Unit from the Case, gently pull on the charger unit while pushing the three charging terminals from the outside of the case. RA1092900 (x 2 pcs) SHEET (HEAT10t2) RA1088900 BOTTOM PLATE...

  • Page 26: Parts Layout

    CD-46 Charger Cradle Parts Layout (Side A) (Side B) BAJ2CC0FP 2SB1201S NJM12903R (Q3002) (Q3007) (Q3001) 2SA1774 (FR) DTC124EU (25) DTC144EE (26) (Q3006) (Q3008) (Q3003, 3004, 3005)
  • Page 27 CD-46 Charger Cradle Parts List DESCRIPTION VALUE TOL. MFR'S DESIG VXSTD P/N VERS. LOT SIDE LAY ADR Printed Circuit Board FR019300D C 3001 CHIP CAP. 0.1uF GRM21BB11E104KA01L K22140811 C 3002 CHIP CAP. 0.1uF GRM188B11C104KA01D K22124805 C 3003 CHIP CAP. 0.1uF GRM188B11C104KA01D K22124805 C 3004...
  • Page 28 Note...
  • Page 29 1 2 3 HX280S/E Main Unit Circuit Diagram 5 6 7...
  • Page 30 1 2 3 HX280S/E Main Unit Circuit Diagram 5 6 7...
  • Page 31 1 2 3 HX280S/E Main Unit Circuit Diagram 5 6 7...
  • Page 32 1 2 3 HX280S/E Main Unit Circuit Diagram 5 6 7...
  • Page 33 1 2 3 HX280S/E Main Unit Circuit Diagram 5 6 7...
  • Page 34 1 2 3 HX280S/E Main Unit Circuit Diagram 5 6 7...
  • Page 35 1 2 3 HX280S/E Main Unit Circuit Diagram 5 6 7...
  • Page 36 1 2 3 HX280S/E Main Unit Circuit Diagram 5 6 7...
  • Page 37 HX280S/E Main Unit (Side “A”) Parts Layout...
  • Page 38 HX280S/E Main Unit (Side “A”) Parts Layout...
  • Page 39 HX280S/E Main Unit (Side “B”) Parts Layout...
  • Page 40 HX280S/E Main Unit (Side “B”) Parts Layout...
  • Page 41 Note...
  • Page 42 © 2009 VERTEX STANDARD CO., LTD. All rights reserved. Marine Division of VERTEX STANDARD No portion of this manual US Headquarters may be reproduced 10900 Walker Street, Cypress, CA 90630, U.S.A. without the permission of VERTEX STANDARD CO., LTD.

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Hx280e

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