Related Manuals for Standard Horizon HX270S
Summary of Contents for Standard Horizon HX270S
- Page 1 VHF/FM Marine Handheld Transceiver HX270S SERVICE MANUAL EM007N90A...
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Page 2: Specifications
Specifications General Frequency range: 156 MHz - 163.275 MHz (Marine Band + WX Band) Channel Steps: 25 kHz Frequency stability: ± 5 ppm (–22 °F to +140 °F [–30 °C to +60 °C]) Emission type: 16K0G3E Antenna impedance: 50 Ohms Supply voltage: 7.2 VDC Current consumption:... -
Page 3: Exploded View & Miscellaneous Parts
Exploded View & Miscellaneous Parts RA0600400 WINDOW RA0401600 O RING RA058850A DOUBLE FACE TAPE RA057720A LIGHT GUIDE RA0589300 FRONT CASE ASSY RA0589400 FRONT CASE RA0478500 SPECIAL NUT ASSY RA0577100 HOLDER RA057700A RUBBER KNOB RA0588800 VOLUME KNOB RA057840A RA0588900 RING NUT RUBBER KNOB RA0434100 SHEET... - Page 4 Exploded View & Miscellaneous Parts Note...
- Page 5 Block Diagram...
- Page 6 Connection Diagram...
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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 Q1033 coils L1025, L1026, and L1027, capacitors C1229, C1235, (NJM2591V). - Page 8 Circuit Description The data latch section of Q1015 (MB15A01PFV1) also re- If a CDCSS code is enabled for transmission, the code is generated by Q1043 (HD64F38024W) and delivered to ceives serial dividing data from the microprocessor Q1043 X1001 (21.25 MHz) for CDCSS modulating. (HD64F38024W), which causes the pre-divided VCO sig- nal to be further divided in the programmable divider The modulated signal from the VCO Q1012 (2SC5231) is...
- Page 9 Alignment The HX270S 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.“ The trans- Set up the test equipment as shown below for PLL and Ttransmitter Section Alignment. Maintain the sup- ceiver now is in the Transmitter Modulation Align- ply voltage at 7.5V DC for all steps.
- Page 12 Alignment Note...
- Page 13 MAIN Unit Circuit Diagram RX: 0 V TX: 2.8 V RX: 0 V 4.4 V 4.5 V TX: 1.2 V 3.4 V RX: 0 V 4.2 V RX: 0.5 V TX: 3.6 V RX: 7.2 V RX: 0 V TX: 0.7 V 2.8 V TX: 4.2 V TX: 5.0 V...
- Page 14 MAIN Unit Note...
- Page 15 MAIN Unit Parts Layout (Side A) HD64F38024 (Q1043) LM2904PWR (Q1003, 1050) BR24L64F (Q1042) M62364FP (Q1030) 2SA1774 (FR) 2SC4617 (BR) RD07MVS1 BD4845FVE DTC143ZE (E23) S-812C30AMC UMD2N (D2) DA221 (K) 1SS321 (F9) (Q1019) (Q1006, 1016, (Q1036) (Q1021) (Q1005) (Q1010) (Q1039) (D1009, 1025) (D1032) 1026, 1029, FMMTL718...
- Page 16 MAIN Unit Parts Layout (Side B) LM2904PWR LM2902PWR 2SA1774 (FR) 2SC4400 (RT4) 2SJ364 (4M) 2SK3074 (WA) DTA114TE (94) DTA143XE (33) DTA144EE (16) DTC144EE (26) UMW1 (W1) DA221 (K) DAN235E (Q1052) (Q1051) (Q1011, 1024) (Q1037) (Q1035) (Q1034) (Q1002) (Q1027) (Q1007) (Q1008) (Q1018, 1025) (D1012, 1013, (D1010)
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Page 17: Main Unit
MAIN Unit Parts List DESCRIPTION VALUE TOL. MFR'S DESIG VXSTD P/N VERS. LOT SIDE LAY ADR PCB with Components CB2718001 CE OFF, DST USA CB2718002 CE OFF, DST EXP CB2718003 CE ON, DST EU Printed Circuit Board AM007N000 FR0113900 C 1001 CHIP CAP. - Page 18 MAIN Unit Parts List DESCRIPTION VALUE TOL. MFR'S DESIG VXSTD P/N VERS. LOT SIDE LAY ADR C 1074 CHIP TA.CAP. 4.7uF TEMSVA1C475M-8R K78120031 C 1075 CHIP TA.CAP. 4.7uF TEMSVA1C475M-8R K78120031 C 1076 CHIP CAP. 0.001uF GRM36B102K50PT K22178809 C 1077 CHIP CAP. UMK105CH050CW-F K22178253 C 1078...
- Page 19 MAIN Unit Parts List DESCRIPTION VALUE TOL. MFR'S DESIG VXSTD P/N VERS. LOT SIDE LAY ADR C 1154 CHIP CAP. 15pF GRM39CH150J50PT K22174215 C 1155 CHIP CAP. 0.1uF GRM36B104K10PT K22108802 C 1156 CHIP CAP. UMK105CH080DW-F K22178256 C 1157 CHIP CAP. 100pF UMK105CH101JW-F K22178282...
- Page 20 MAIN Unit Parts List DESCRIPTION VALUE TOL. MFR'S DESIG VXSTD P/N VERS. LOT SIDE LAY ADR C 1230 CHIP CAP. 0.001uF GRM36B102K50PT K22178809 C 1231 CHIP CAP. 0.047uF GRM36B473K10PT K22108801 C 1232 CHIP TA.CAP. 47uF SK7-0G476M-RA K78060048 C 1233 CHIP CAP. 0.001uF GRM36B102K50PT K22178809...
- Page 21 MAIN Unit Parts List DESCRIPTION VALUE TOL. MFR'S DESIG VXSTD P/N VERS. LOT SIDE LAY ADR L 1007 M.RFC LK1608 1R0K-T L1690687 L 1008 COIL E2 0.28-1.0-4.5T-R L0022395 L 1009 M.RFC LK1608 1R0K-T L1690687 L 1010 COIL E2 0.45-1.4-4T-L L0022391 L 1011 COIL E2 0.25-1.9-8.5T-L...
- Page 22 MAIN Unit Parts List DESCRIPTION VALUE TOL. MFR'S DESIG VXSTD P/N VERS. LOT SIDE LAY ADR R 1005 CHIP RES. 1.5k 1/16W RMC1/16S 152JTH J24189027 R 1006 CHIP RES. 5.6k 1/16W RMC1/16S 562JTH J24189034 R 1007 CHIP RES. 1/16W RMC1/16S 333JTH J24189043 R 1008 CHIP RES.
- Page 23 MAIN Unit Parts List DESCRIPTION VALUE TOL. MFR'S DESIG VXSTD P/N VERS. LOT SIDE LAY ADR R 1079 CHIP RES. 470k 1/16W RMC1/16S 474JTH J24189057 R 1080 CHIP RES. 1/16W RMC1/16S 103JTH J24189037 R 1081 CHIP RES. 1/16W RMC1/16S 105JTH J24189061 R 1082 CHIP RES.
- Page 24 MAIN Unit Parts List DESCRIPTION VALUE TOL. MFR'S DESIG VXSTD P/N VERS. LOT SIDE LAY ADR R 1160 CHIP RES. 330k 1/16W RMC1/16S 334JTH J24189055 R 1161 CHIP RES. 100k 1/16W RMC1/16S 104JTH J24189049 R 1162 CHIP RES. 1/16W RMC1/16S 470JTH J24189009 R 1163 CHIP RES.
- Page 25 MAIN Unit Parts List DESCRIPTION VALUE TOL. MFR'S DESIG VXSTD P/N VERS. LOT SIDE LAY ADR R 1233 CHIP RES. 1/16W RMC1/16S 102JTH J24189025 R 1234 CHIP RES. 1/16W RMC1/16S 153JTH J24189039 R 1235 CHIP RES. 1/16W RMC1/16S 103JTH J24189037 R 1236 CHIP RES.
- Page 26 MAIN Unit Note...
- Page 28 © 2004 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.