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Standard Horizon HX370S Service Manual
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Standard Horizon HX370S Service Manual

Standard Horizon HX370S Service Manual

Vhf/fm marine handheld transceiver
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VHF/FM Marine Handheld Transceiver
HX370S
SERVICE MANUAL
EM008N90B
1

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Summary of Contents for Standard Horizon HX370S

  • Page 1 VHF/FM Marine Handheld Transceiver HX370S SERVICE MANUAL EM008N90B...

  • Page 2: Specifications

    Specifications General Frequency range: 156 MHz - 163.275 MHz (Marine Band + WX Band) Channel Steps: 25 kHz 137 MHz - 174 MHz (LMR) Channel Steps: 12.5 / 25 kHz Frequency stability: ± 2.5 ppm (–22 °F to +140 °F [–30 °C to +60 °C]) Emission type: 16K0G3E, 16K0F3E, 11K0F3E Antenna impedance:...

  • Page 3: Exploded View & Miscellaneous Parts

    Exploded View & Miscellaneous Parts RA0588600 WINDOW RA0401600 O RING RA058850A DOUBLE FACE TAPE RA0577200 LIGHT GUIDE CP7936001 FRONT CASE ASSY RA0588400 FRONT CASE RA0478500 RA0577100 SPECIAL NUT ASSY HOLDER RA0578400 RA057700A RING NUT RUBBER KNOB RA0467600 O RING RA0588800 VOLUME KNOB RA0588900 RA0577900...
  • Page 4 Exploded View & Miscellaneous Parts Note...
  • Page 5 Block Diagram...
  • Page 6 Connection Diagram...

  • Page 7: Circuit Description

    Circuit Description 1. Receive Signal Path 3. Squelch Control Incoming RF from the antenna jack is delivered to the RF The squelch circuitry consists of a noise amplifier and Unit and passes through a low-pass filter consisting of band-pass filter and noise detector within Q1039 coils L1023, L1026, and L1027, capacitors C1227, C1273, (NJM2591V) When no carrier received, noise at the out- C1276, C1270, C1257, and C1256, and antenna switching...
  • Page 8 Circuit Description If a CDCSS code is enabled for transmission, the code is The data latch section of Q1017 (MB15A01PFV1) also re- generated by microprocessor Q1066 (HD64F2266) and de- ceives serial dividing data from the microprocessor Q1066 livered to X1001 (21.25 MHz) for CDCSS modulating. (HD64F2266), which causes the pre-divided VCO signal to be further divided in the programmable divider sec- The modulated signal from the VCO Q1012 (2SC5231) is...
  • Page 9 Alignment The HX370S has been carefully aligned at the factory for Required Test Equipment the specified performance across the land mobile band. RF Signal Generator with calibrated output level at 200 MHz Realignment should therefore not be necessary except in Deviation Meter (linear detector) the event of a component failure.
  • Page 10 Alignment Before Alignment Squelch Threshold and Tight Squelch Adjustment Press and hold in the [ ] key and [ MEM ] key while Set up the test equipment as shown below for Receiver turning the transceiver on to enter the Alignment Section Alignment.
  • Page 11 Alignment Transmitter Power Output Transmitter Modulation Press the [ ] key to set the display to “dEu dEu.“ The trans- Set up the test equipment as shown below for PLL and Ttransmitter Section Alignment. Maintain the ceiver now is in the Transmitter Modulation Align- supply voltage at 8.4V DC for all steps.
  • Page 12 Alignment Note...
  • Page 13 MAIN Unit (Lot. 1~3) Circuit Diagram 4.5 V RX: 8.40 V RX: 0 V TX: 8.20 V TX: 2.80 V 3.50 V RX: 0 V TX: 4.60 V 0.67 V 4.30 V RX: 2.90 V RX: 0 V RX: 0 V TX: 2.86 V TX: 3.65 V TX: 1.10 V...
  • Page 14 MAIN Unit (Lot. 1~3) Note...
  • Page 15 MAIN Unit (Lot. 1~3) Parts Layout (Side A) HD64F2266 (Q1024) AT24C128N (Q1067) LM2904PWR (Q1062, 1079) CD4094BPWR (Q1053) M62364FP (Q1033) 2SA1774 (FR) 2SC4617 (BR) RD07MVS1 BD4845FVE DTA114TE (94) DTC143ZE (E23) S-812C30AMC UMD2N (D2) DA221 (K) 1SS321 (F9) (Q1022) (Q1004, 1021, (Q1045) (Q1023) (Q1003) (Q1005)
  • Page 16 MAIN Unit (Lot. 1~3) Parts Layout (Side B) LM2904PWR LM2902PWR 2SA1774 (FR) 2SC4400 (RT4) 2SJ347 (KS) 2SK3074 (WA) DTA114TE (94) DTA143XE (33) DTA144EE (16) DTC144EE (26) UMW1 (W1) DA221 (K) DAN222 (N) (Q1075, 1078) (Q1074, 1076) (Q1007, 1025, (Q1046) (Q1011) (Q1036) (Q1002) (Q1029)
  • Page 17 MAIN Unit (Lot. 4~7) Circuit Diagram 4.5 V RX: 8.40 V RX: 0 V TX: 8.20 V TX: 2.80 V 3.50 V RX: 0 V TX: 4.60 V 0.67 V 4.30 V RX: 2.90 V RX: 0 V RX: 0 V TX: 2.86 V TX: 3.65 V TX: 1.10 V...
  • Page 18 MAIN Unit (Lot. 4~7) Note...
  • Page 19 MAIN Unit (Lot. 4~7) Parts Layout (Side A) HD64F2266 (Q1024) AT24C128N (Q1067) LM2904PWR (Q1062, 1079) CD4094BPWR (Q1053) M62364FP (Q1033) 2SA1774 (FR) 2SC4617 (BR) RD07MVS1 BD4845FVE DTA114TE (94) DTC143ZE (E23) S-812C30AMC UMD2N (D2) DA221 (K) 1SS321 (F9) (Q1022) (Q1004, 1021, (Q1045) (Q1023) (Q1003) (Q1005)
  • Page 20 MAIN Unit (Lot. 4~7) Parts Layout (Side B) LM2904PWR LM2902PWR 2SA1774 (FR) 2SC4400 (RT4) 2SJ347 (KS) 2SK3074 (WA) DTA114TE (94) DTA143XE (33) DTA144EE (16) DTC144EE (26) UMW1 (W1) DA221 (K) DAN222 (N) (Q1075, 1078) (Q1074, 1076) (Q1007, 1025, (Q1046) (Q1011) (Q1036) (Q1002) (Q1029)
  • Page 21 MAIN Unit (Lot. 8~18) Circuit Diagram 4.5 V RX: 8.40 V RX: 0 V TX: 8.20 V TX: 2.80 V 3.50 V RX: 0 V TX: 4.60 V 0.67 V 4.30 V RX: 2.90 V RX: 0 V RX: 0 V TX: 2.86 V TX: 3.65 V TX: 1.10 V...
  • Page 22 MAIN Unit (Lot. 8~18) Note...
  • Page 23 MAIN Unit (Lot. 8~18) Parts Layout (Side A) HD64F2266 (Q1024) AT24C128N (Q1067) LM2904PWR (Q1062, 1079) CD4094BPWR (Q1053) M62364FP (Q1033) 2SA1774 (FR) 2SC4617 (BR) RD07MVS1 BD4845FVE DTA114TE (94) DTC143ZE (E23) S-812C30AMC UMD2N (D2) DA221 (K) 1SS321 (F9) (Q1022) (Q1004, 1021, (Q1045) (Q1023) (Q1003) (Q1005)
  • Page 24 MAIN Unit (Lot. 8~18) Parts Layout (Side B) LM2904PWR LM2902PWR 2SA1774 (FR) 2SC4400 (RT4) 2SJ347 (KS) 2SK3074 (WA) DTA114TE (94) DTA143XE (33) DTA144EE (16) DTC144EE (26) UMW1 (W1) DA221 (K) DAN222 (N) (Q1075, 1078) (Q1074, 1076) (Q1007, 1025, (Q1046) (Q1011) (Q1036) (Q1002) (Q1029)
  • Page 25 MAIN Unit (Lot. 19~) Circuit Diagram 4.5 V RX: 8.40 V RX: 0 V TX: 8.20 V TX: 2.80 V 3.50 V RX: 0 V TX: 4.60 V 0.67 V 4.30 V RX: 2.90 V RX: 0 V RX: 0 V TX: 2.86 V TX: 3.65 V TX: 1.10 V...
  • Page 26 MAIN Unit (Lot. 19~) Note...
  • Page 27 MAIN Unit (Lot. 19~) Parts Layout (Side A) HD64F2266 (Q1024) AT24C128N (Q1067) LM2904PWR (Q1062, 1079) CD4094BPWR (Q1053) M62364FP (Q1033) 2SA1774 (FR) 2SC4617 (BR) RD07MVS1 BD4845FVE DTA114TE (94) DTC143ZE (E23) S-812C30AMC UMD2N (D2) DA221 (K) 1SS321 (F9) (Q1022) (Q1004, 1021, (Q1045) (Q1023) (Q1003) (Q1005)
  • Page 28 MAIN Unit (Lot. 19~) Parts Layout (Side B) LM2904PWR LM2902PWR 2SA1774 (FR) 2SC4400 (RT4) 2SJ347 (KS) 2SK3074 (WA) DTA114TE (94) DTA143XE (33) DTA144EE (16) DTC144EE (26) UMW1 (W1) DA221 (K) DAN222 (N) (Q1075, 1078) (Q1074, 1076) (Q1007, 1025, (Q1046) (Q1011) (Q1036) (Q1002) (Q1029)

  • Page 29: Main Unit

    MAIN Unit Parts List DESCRIPTION VALUE TOL. MFR'S DESIG VXSTD P/N VERS. SIDE LAY ADR PCB with Components CB2717001 CB2717002 EXPORT CB2717007 AUSTRALIA Printed Circuit Board AM008N000 FR011410C FR011410D FR011410E 8-18 FR011410F C 1001 CHIP TA.CAP. 10uF TEESVA1A106M8R K78100028 C 1002 CHIP CAP.
  • Page 30 MAIN Unit Parts List DESCRIPTION VALUE TOL. MFR'S DESIG VXSTD P/N VERS. SIDE LAY ADR C 1049 CHIP CAP. 20pF GRM1552C1H200GZ01 K22179702 C 1050 CHIP CAP. 0.001uF GRM155B11H102KA01D K22178809 C 1051 CHIP CAP. 0.001uF GRM155B11H102KA01D K22178809 C 1052 CHIP CAP. 1.5pF UMK105CK1R5CV-F K22178249...
  • Page 31 MAIN Unit Parts List DESCRIPTION VALUE TOL. MFR'S DESIG VXSTD P/N VERS. SIDE LAY ADR C 1118 CHIP CAP. 0.001uF GRM155B11H102KA01D K22178809 C 1119 CHIP CAP. 15pF UMK105CH150JV-F K22178262 C 1120 CHIP CAP. 15pF UMK105CH150JV-F K22178262 C 1121 CHIP CAP. 0.001uF GRM155B11H102KA01D K22178809...
  • Page 32 MAIN Unit Parts List DESCRIPTION VALUE TOL. MFR'S DESIG VXSTD P/N VERS. SIDE LAY ADR C 1173 CHIP CAP. UMK105CH080DV-F K22178256 1-18 C 1173 CHIP CAP. UMK105CK010CV-F K22178248 AUSTRALIA 19- C 1173 CHIP CAP. UMK105CH080DV-F K22178256 EXPORT C 1173 CHIP CAP. UMK105CH080DV-F K22178256 C 1174...
  • Page 33 MAIN Unit Parts List DESCRIPTION VALUE TOL. MFR'S DESIG VXSTD P/N VERS. SIDE LAY ADR C 1226 CHIP CAP. 0.01uF GRM36B103K16PT K22128804 1-41 C 1226 CHIP CAP. 0.01uF GRM155B11E103KA01D K22148834 C 1227 CHIP TA.CAP. 22uF 6.3V TEESVA0J226M8R K78080047 C 1230 CHIP CAP.
  • Page 34 MAIN Unit Parts List DESCRIPTION VALUE TOL. MFR'S DESIG VXSTD P/N VERS. SIDE LAY ADR C 1299 CHIP CAP. 0.001uF GRM155B11H102KA01D K22178809 C 1299 CHIP CAP. 0.01uF GRM36B103K16PT K22128804 4-41 C 1299 CHIP CAP. 0.01uF GRM155B11E103KA01D K22148834 C 1300 CHIP CAP. 0.001uF GRM155B11H102KA01D K22178809...
  • Page 35 MAIN Unit Parts List DESCRIPTION VALUE TOL. MFR'S DESIG VXSTD P/N VERS. SIDE LAY ADR D 1041 DIODE 1SS400 TE61 G2070634 D 1042 DIODE 1SS400 TE61 G2070634 D 1043 DIODE 1SS400 TE61 G2070634 D 1044 DIODE RB521S-30 TE61 G2070642 D 1045 DIODE 1SS400 TE61 G2070634...
  • Page 36 MAIN Unit Parts List DESCRIPTION VALUE TOL. MFR'S DESIG VXSTD P/N VERS. SIDE LAY ADR Q 1013 TRANSISTOR 2SC5374-TL G3353748 EXPORT Q 1013 TRANSISTOR 2SC5374-TL G3353748 Q 1014 TRANSISTOR FMMTL718TA G3070335 Q 1016 TRANSISTOR 2SC5374-TL G3353748 Q 1017 MB15A01PFV1-G-BND-EFE1 G1092545 Q 1019 TRANSISTOR FMMTL718TA...
  • Page 37 MAIN Unit Parts List DESCRIPTION VALUE TOL. MFR'S DESIG VXSTD P/N VERS. SIDE LAY ADR R 1008 CHIP RES. 5.6k 1/16W RMC1/16S 562JTH J24189034 R 1009 CHIP RES. 1/16W RMC1/16S 473JTH J24189045 R 1010 CHIP RES. 1/16W RMC1/16S 473JTH J24189045 R 1011 CHIP RES.
  • Page 38 MAIN Unit Parts List DESCRIPTION VALUE TOL. MFR'S DESIG VXSTD P/N VERS. SIDE LAY ADR R 1067 CHIP RES. 100k 1/16W RMC1/16S 104JTH J24189049 R 1068 CHIP RES. 1/16W RMC1/16S 101JTH J24189013 R 1069 CHIP RES. 1/16W RMC1/16S 102JTH J24189025 R 1070 CHIP RES.
  • Page 39 MAIN Unit Parts List DESCRIPTION VALUE TOL. MFR'S DESIG VXSTD P/N VERS. SIDE LAY ADR R 1148 CHIP RES. 1/16W RMC1/16S 333JTH J24189043 AUSTRALIA 20- R 1148 CHIP RES. 1/16W RMC1/16S 102JTH J24189025 EXPORT R 1148 CHIP RES. 1/16W RMC1/16S 102JTH J24189025 R 1149 CHIP RES.
  • Page 40 MAIN Unit Parts List DESCRIPTION VALUE TOL. MFR'S DESIG VXSTD P/N VERS. SIDE LAY ADR R 1210 CHIP RES. 1/16W RMC1/16S 102JTH J24189025 R 1211 CHIP RES. 1/16W RMC1/16S 101JTH J24189013 1-18 R 1211 CHIP RES. 1/16W RMC1/16S 220JTH J24189005 AUSTRALIA 19- R 1211 CHIP RES.
  • Page 41 MAIN Unit Parts List DESCRIPTION VALUE TOL. MFR'S DESIG VXSTD P/N VERS. SIDE LAY ADR R 1270 CHIP RES. 1/16W RMC1/16S 102JTH J24189025 R 1271 CHIP RES. 1/16W RMC1/16S 102JTH J24189025 R 1272 CHIP RES. 1/16W RMC1/16S 103JTH J24189037 R 1273 CHIP RES.
  • Page 42 MAIN Unit Parts List DESCRIPTION VALUE TOL. MFR'S DESIG VXSTD P/N VERS. SIDE LAY ADR R 1349 CHIP RES. 2.2k 1/16W RMC1/16S 222JTH J24189029 R 1350 CHIP RES. 1/16W RMC1/16S 103JTH J24189037 R 1351 CHIP RES. 330k 1/16W RMC1/16S 334JTH J24189055 R 1352 CHIP RES.
  • Page 43 Note...
  • Page 44 © 2008 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.