Standard Horizon HX270S Service Manual Download Page 1 | Manualshive

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SERVICE MANUAL

VHF/FM Marine Handheld Transceiver

HX270S

EM007N90A

HX

27

0S

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Summary of Contents for HX270S

Page 1: ...1 SERVICE MANUAL VHF FM Marine Handheld Transceiver HX270S EM007N90A HX270S ...

Page 2: ...g 30 minutes 1 meter depth JIS 7 Case Size W x H x D 2 3 x 4 7 x 1 2 58 x 120 x 30 5 mm Weight Approx 13 4 oz 380g with FNB 83 Transmitter RF output power 5 W 2 5 W 1 W 7 2 V Modulation Type Variable Reactance Max deviation 5 kHz Spurious emissions At least 73 dB down Microphone impedance 2 k Ohm Receiver Circuit type Double conversion superheterodyne Intermediate Frequencies 1st 21 7 MHz 2nd 450 ...

Page 3: ...T GUIDE RA0557900 SP NET M4090168 SPEAKER G6090161 LCD RA058900A LIGHT GUIDE RA0589100 REFLECTOR SHEET RA0589200 INTER CONNECTOR MAIN Unit RA0578200 MIC HOLDER RUBBER M3290029 MIC ELEMENT RA0337300 SHEET RA008890A O RING CP7979001 REAR CASEASSY RA0434100 SHEET Ref VXSTD P N U9900035 U9900068 U24110002 U07240202 Description TAPTITE SCREW M2X3 1 TAPTITE SCREW M2X4NI 3 TAPTITE SCREW M2X10NI PAN HEAD ...

Page 4: ...4 Exploded View Miscellaneous Parts Note ...

Page 5: ...5 Block Diagram ...

Page 6: ...6 Connection Diagram ...

Page 7: ...ontrol The squelch circuitry consists of a noise amplifier and band pass filter and noise detector within Q1033 NJM2591V When no carrier received noise at the output of the de tector stage in Q1033 NJM2591V is amplified and band pass filtered by the noise amplifier section of Q1033 NJM2591V and the network between pins 7 and 8 and then rectified by detection circuit in Q1033 NJM2591V The resulting...

Page 8: ... before being sent to the programmable divider section of Q1015 MB15A01PFV1 The data latch section of Q1015 MB15A01PFV1 also re ceives serial dividing data from the microprocessor Q1043 HD64F38024W which causes the pre divided VCO sig nal to be further divided in the programmable divider section depending upon the desired receive frequency so as to produce a 5 0 kHz or 6 25 kHz derivative of the c...

Page 9: ... thorough famil iarity with its correct use is necessary for complete re alignment Correction of problems caused by misalign ment resulting from use of improper test equipment is not covered under the warranty policy While most steps do not require all of the equipment listed the interactions of some adjustments may require that more complex ad justments be performed afterwards Do not attempt to p...

Page 10: ... Receiver Section Alignment Maintain the supply voltage at 8 4V DC for all steps Press the key twice to set the display to tHL The transceiver now is in the Squelch ThresholdAlign ment Mode Set the RF signal generator output to 155 600 MHz at a level of 12 dBµ with 3 5 kHz deviation with a 1 kHz audio tone Press the PRESET key to read the Squelch Thresh old data Press the H L key twice Press the P...

Page 11: ...key to enable adjustment of the Low Power setting Press the PTT key to cause the transceiver to transmit if necessary press the or key to adjust the output power to 1 0 W 0 05 W Press the PRESET key to exit the Transmitter Low Power Output Alignment Mode Transmitter Modulation Press the key to set the display to dEu The trans ceiver now is in the Transmitter Modulation Align ment Mode Set the AF g...

Page 12: ...12 Alignment Note ...

Page 13: ... 4 V 2 5 V 2 4 V 2 4 V RX 2 4 V TX 2 3 V RX 0 V TX 3 0 V RX 3 0 V TX 0 V 0 V 3 0 V RX 2 4 V TX 2 3 V RX 2 4 V TX 2 3 V RX 2 4 V TX 2 3 V RX 2 4 V TX 2 3 V RX 5 8 V TX 5 6 V 0 V 0 V RX 5 0 V TX 5 6 V RX 5 9 V TX 5 2 V RX 2 0 V TX 0 V RX 2 6 V TX 0 V RX 0 V TX 2 3 V RX 0 V TX 3 0 V 0 V 0 8 V 3 0 V RX 0 3 V TX 1 0 V RX 0 5 V TX 1 0 V RX 7 2 V TX 6 6 V RX 0 V TX 2 4 V RX 0 V TX 2 3 V RX 7 2 V TX 4 2 V...

Page 14: ...14 MAIN Unit Note ...

Page 15: ... BD4845FVE Q1021 DTC143ZE E23 Q1005 S 812C30AMC Q1010 HD64F38024 Q1043 LM2904PWR Q1003 1050 RD07MVS1 Q1036 UMD2N D2 Q1039 DA221 K D1009 1025 1SS321 F9 D1032 2SA1774 FR Q1019 FMMTL718 Q1014 2SC4617 BR Q1006 1016 1026 1029 1032 2SC5374 NA Q1045 FMMTL618 Q1028 M62364FP Q1030 ...

Page 16: ...1038 1040 2SC5006 24 Q1044 2SC5226 R22 Q1031 2SC5231 C9 Q1012 2SC5374 NA Q1013 1020 1023 DTA143XE 33 Q1027 DTC144EE 26 Q1008 MB15A01PFV1 Q1015 NJM2591V Q1033 UMW1 W1 Q1018 1025 DA221 K D1012 1013 1023 DAN235E D1010 2SJ364 4M Q1035 2SK3074 WA Q1034 3SK320 U7 Q1041 DTA114TE 94 Q1002 DTA144EE 16 Q1007 LM2904PWR Q1052 LM2902PWR Q1051 ...

Page 17: ...8285 1 B b3 C 1034 CHIP CAP 0 001uF 50V B GRM36B102K50PT K22178809 1 B b3 C 1035 CHIP CAP 15pF 50V CH UMK105CH150JW F K22178262 1 B b3 C 1036 CHIP CAP 0 001uF 50V B GRM36B102K50PT K22178809 1 B g2 C 1037 CHIP CAP 0 001uF 50V B GRM36B102K50PT K22178809 1 B b3 C 1038 CHIP CAP 0 047uF 10V B GRM36B473K10PT K22108801 1 B b4 C 1039 CHIP CAP 180pF 25V CH TMK105CH181JW F K22148244 1 B f1 C 1040 CHIP CAP 0...

Page 18: ...20pF 50V CH UMK105CH121JW F K22178284 1 B a2 C 1114 CHIP CAP 120pF 50V CH UMK105CH121JW F K22178284 1 B a2 C 1115 CHIP CAP 0 001uF 50V B GRM36B102K50PT K22178809 1 B a2 C 1116 CHIP CAP 0 001uF 50V B GRM36B102K50PT K22178809 1 B d4 C 1117 CHIP CAP 56pF 50V CH UMK105CH560JW F K22178276 1 B a2 C 1118 CHIP TA CAP 10uF 10V TEMSVA1A106M 8R K78100028 1 B b2 C 1119 CHIP CAP 0 033uF 10V B GRM36B333K10PT K2...

Page 19: ...T K22178285 1 B e3 C 1188 CHIP CAP 39pF 50V CH UMK105CH390JW F K22178272 1 B e2 C 1189 CHIP CAP 0 001uF 50V B GRM36B102K50PT K22178809 1 A B4 C 1191 CHIP CAP 1pF 50V CK GRM36CK010B50PT K22178287 1 B e3 C 1192 CHIP CAP 1 5pF 50V CK GRM36CK1R5C50PT K22178203 1 B e3 C 1193 CHIP CAP 0 022uF 16V B GRM36B223K16PT K22128806 1 A E3 C 1194 CHIP CAP 1uF 10V F GRM39F105Z10PT K22105001 1 B c2 C 1195 CHIP CAP ...

Page 20: ...0596 1 B b3 D 1005 DIODE RB521S 30 TE61 G2070642 1 A A2 D 1006 DIODE HSC277TRF G2070584 1 B b3 D 1007 DIODE HSC277TRF G2070584 1 B b3 D 1008 DIODE HVC350B TRF G2070596 1 B a3 D 1009 DIODE DA221 TL G2070178 1 A A1 D 1010 DIODE DAN235E TL G2070612 1 B d4 D 1011 DIODE 1SS400 TE61 G2070634 1 A F1 D 1012 DIODE DA221 TL G2070178 1 B a2 D 1013 DIODE DA221 TL G2070178 1 B a2 D 1014 LED 19 215UYOC S530 A2 ...

Page 21: ...Q 1012 TRANSISTOR 2SC5231C9 TL G3352318I 1 B c3 Q 1013 TRANSISTOR 2SC5374 TL G3353748 1 B c3 Q 1014 TRANSISTOR FMMTL718TA G3070335 1 A A2 Q 1015 IC MB15A01PFV1 G BND EF G1092545 1 B a3 Q 1016 TRANSISTOR 2SC4617 TL R G3346178R 1 A A2 Q 1017 TRANSISTOR FMMTL718TA G3070335 1 B g1 Q 1018 TRANSISTOR UMW1 TR G3070078 1 B g1 Q 1019 TRANSISTOR 2SA1774 TL R G3117748R 1 A A2 Q 1020 TRANSISTOR 2SC5374 TL G33...

Page 22: ... R 1039 CHIP RES 2 2k 1 16W 5 RMC1 16S 222JTH J24189029 1 B b4 R 1040 CHIP RES 1k 1 16W 5 RMC1 16S 102JTH J24189025 1 B f2 R 1041 CHIP RES 5 6k 1 16W 5 RMC1 16S 562JTH J24189034 1 B f1 R 1042 CHIP RES 220k 1 16W 5 RMC1 16S 224JTH J24189053 1 B a4 R 1043 CHIP RES 100 1 16W 5 RMC1 16S 101JTH J24189013 1 B c3 R 1044 CHIP RES 680 1 16W 5 RMC1 16S 681JTH J24189023 1 B b3 R 1045 CHIP RES 1M 1 16W 5 RMC1...

Page 23: ... CHIP RES 100 1 16W 5 RMC1 16S 101JTH J24189013 1 A E1 R 1120 CHIP RES 100 1 16W 5 RMC1 16S 101JTH J24189013 1 A F1 R 1121 CHIP RES 100 1 16W 5 RMC1 16S 101JTH J24189013 1 A F1 R 1122 CHIP RES 100 1 16W 5 RMC1 16S 101JTH J24189013 1 A F1 R 1123 CHIP RES 470 1 16W 5 RMC1 16S 471JTH J24189021 1 B d3 R 1124 CHIP RES 100 1 16W 5 RMC1 16S 101JTH J24189013 1 A B2 R 1125 CHIP RES 100 1 16W 5 RMC1 16S 101...

Page 24: ...S 222JTH J24189029 1 B b2 R 1191 CHIP RES 10k 1 16W 5 RMC1 16S 103JTH J24189037 1 B c2 R 1192 CHIP RES 82 1 16W 5 RMC1 16S 820JTH J24189012 1 B e2 R 1194 CHIP RES 2 2k 1 16W 5 RMC1 16S 222JTH J24189029 1 B e2 R 1195 CHIP RES 22k 1 16W 5 RMC1 16S 223JTH J24189041 1 B d2 R 1196 CHIP RES 22k 1 16W 5 RMC1 16S 223JTH J24189041 1 B c2 R 1197 CHIP RES 220k 1 16W 5 RMC1 16S 224JTH J24189053 1 B e2 R 1199 ...

Page 25: ...24189025 1 A E2 R 1261 CHIP RES 8 2k 1 16W 5 RMC1 16S 822JTH J24189036 1 A A3 R 1262 CHIP RES 1k 1 16W 5 RMC1 16S 102JTH J24189025 1 A D2 R 1263 CHIP RES 1k 1 16W 5 RMC1 16S 102JTH J24189025 1 A D2 R 1264 CHIP RES 1k 1 16W 5 RMC1 16S 102JTH J24189025 1 A D2 R 1265 CHIP RES 1k 1 16W 5 RMC1 16S 102JTH J24189025 1 A E2 R 1266 CHIP RES 22k 1 16W 5 RMC1 16S 223JTH J24189041 1 A B3 R 1267 CHIP RES 8 2k ...

Page 26: ...26 Note MAIN Unit ...

Page 27: ...27 ...

Page 28: ...NDARD CO LTD All rights reserved No portion of this manual may be reproduced without the permission of VERTEX STANDARD CO LTD Marine Division of VERTEX STANDARD US Headquarters 10900 Walker Street Cypress CA 90630 U S A ...

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