Standard_HX-270S_serv.pdf

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1、1 SERVICE MANUAL VHF/FM Marine Handheld Transceiver HX270S EM007N90A HX270S 2 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 vo

2、ltage:7.2 VDC Current consumption:200 mA (Receive) 40 mA (Standby, Saver Off) TX: 1.4 A (H)/0.9 A (M)/0.5 A (L) Operating Temperature:22 F to +140 F (30 C to +60 C) Waterproof rating: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 o

3、z (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 kHz

4、Sensitivity:0.25 V 12 dB SINAD Adjacent channel selectivity:70 dB Intermodulation response:70 dB Selectivity:12 kHz / 25 kHz (6 dB/60 dB) AF output:600 mW 16 Ohm for 10 % THD (7.2V) 3 Exploded View realign- ment should not be done until after the faulty component has been replaced. We recommend that

5、 servicing be performed only by au- thorized STANDARD HORIZON service technicians who are experienced with the circuitry and fully equipped for repair and alignment. Therefore, if a fault is suspected, contact the dealer from whom the transceiver was pur- chased for instructions regarding repair. Au

6、thorized STANDARD HORIZON service technicians realign all circuits and make complete performance checks to ensure compliance with factory specifications after replacing any faulty components. Those who do undertake any of the following alignments are cautioned to proceed at their own risk. Problems

7、caused by unauthorized attempts at realignment are not covered by the warranty policy. Also, STANDARD HORIZON must reserve the right to change circuits and alignment procedures in the interest of improved perfor- mance, without notifying owners. Under no circumstanc- es should any alignment be attem

8、pted unless the normal function and operation of the transceiver are clearly un- derstood, the cause of the malfunction has been clearly pinpointed and any faulty components replaced, and the need for realignment determined to be absolutely neces- sary. The following test equipment (and thorough fam

9、il- 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 adju

10、stments may require that more complex ad- justments be performed afterwards. Do not attempt to perform only a single step unless it is clearly isolated elec- trically from all other steps. Have all test equipment ready before beginning, and follow all of the steps in a section in the order presented

11、. Required Test Equipment ?RF Signal Generator with calibrated output level at 200 MHz ?Deviation Meter (linear detector) ?AF Millivoltmeter ?SINAD Meter ?Inline Wattmeter with 5% accuracy at 200 MHz ?Regulated DC Power Supply: adjustable from 6 to 17 VDC, 3A ?50-ohm Non-reactive Dummy Load: 10W at

12、200 MHz ?Frequency Counter: 0.1 ppm accuracy at 200 MHz ?AF Signal Generator ?DC Voltmeter: high impedance ?VHF Sampling Coupler ?AF Dummy Load: 8 ohm, 2W ?Oscilloscope ?Spectrum Analyzer Alignment Preparation if necessary, press the ? or ? key to adjust the frequency to 155.500 MHz (100 Hz). ?Press

13、 the PRESET key to exit the PLL Reference Fre- quency Alignment Mode. Alignment Squelch Threshold and Tight Squelch Adjustment ?Set up the test equipment as shown below for Receiver Section Alignment. Maintain the supply voltage at 8.4V DC for all steps. ?Press the ? key twice to set the display to

14、“tHL.“ The transceiver now is in the Squelch Threshold Align- ment Mode. ?Set the RF signal generator output to 155.600 MHz, at a level of 12 dB 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 PRESET key

15、 to exit the Squelch Thresh- old Alignment Mode. ?Press the ? key monentarily to set the display to “tI.“ The transceiver now is in the Squelch Tight Align- ment Mode. ?Increase the RF signal generator output to 4 dB, then press the PRESET key to read the Squelch Tight data. ?Press the H/L key twice

16、. ?Press the PRESET key to exit the Squelch Tight Alignment Mode. PLL if necessary, press the ? or ? key to adjust the output power to 5.0 W (0.1 W). ?Press the PRESET key to exit the Transmitter High Power Output Alignment Mode. ?Press the ? key momentarily to set the display to “CP.“ The transceiv

17、er now is in the Transmitter Me- dium Power Output Alignment Mode. ?Press the PRESET key to enable adjustment of the Medium Power setting. ?Press the PTT key to cause the transceiver to transmit; if necessary, press the ? or ? key to adjust the output power to 2.5 W (0.1 W). ?Press the PRESET key to

18、 exit the Transmitter Me- dium Power Output Alignment Mode. ?Press the ? key momentarily to set the display to “LP.“ The transceiver now is in the Transmitter Low Power Output Alignment Mode. ?Press the PRESET key to enable adjustment of the Low Power setting. ?Press the PTT key to cause the transce

19、iver 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 Modulatio

20、n Align- ment Mode. ?Set the AF generator output to 50 mV rms 1 kHz. ?Press the PRESET key to enable adjustment of the Transmitter Modulation. ?Press the PTT key to cause the transceiver to transmit; if necessary, press the ? or ? key to adjust the deviation to 4.3 kHz (0.1 kHz). ?Press the PRESET k

21、ey to exit the Transmitter Modu- lation Alignment Mode. ATIS Deviation Confirmation ?Press the ? key to set the display to “Ati.“ The trans- ceiver now is in the ATIS Deviation Confirmation Mode. ?Press the PRESET key, then press the H/L key twice to set the display to “CH.“ ?Press the PTT key to ca

22、use the transceiver to transmit (with no microphone input); confirm the the devia- tion meter reading is 2.3 kHz (0.3 kHz). ?Press the PRESET key to exit the ATIS Deviation Confirmation Mode. Exit from the Alignment Mode Press the 16/9 key to save the new setting(s) and exit to normal operation. Ali

23、gnment RECEIVER SECTION ALIGNMENT SETUP 8.4 V DC Regulated Power Supply RF Signal Generator HX27 0S 12 Alignment Note 13 MAIN Unit Circuit Diagram 4.5 V 4.4 V 0 V 4.2 V 2.1 V RX: 5.3 V TX: 5.2 V 5.2 V 1.5 V 3.6 V 3.4 V RX: 0.5 V TX: 0.7 V2.8 V RX: 0.6 V TX: 0.7 V RX: 0 V TX: 3.6 V RX: 3.6 V TX: 0 V

24、RX: 0 V TX: 1.5 V RX: 0 V TX: 4.3 V RX: 5.1 V TX: 0 V 5.2 V RX: 0 V TX: 5.0 V RX: 5.2 V TX: 4.4 V RX: 1.4 V TX: 5.2 V RX: 5.2 V TX: 2.3 V RX: 0 V TX: 2.8 V RX: 0.7 V TX: 2.1 V RX: 1.3 V TX: 1.4 V 2.9 V 3.0 V 0.6 V RX: 0 V TX: 2.9 V 0 V 0 V 2.7 V 2.7 V RX: 7.2 V TX: 6.9 V RX: 6.9 V TX: 6.7 V3.0 V 5.2

25、 V RX: 3.1 V TX: 3.0 V 2.4 V 2.9 V RX: 6.6 V TX: 6.2 V RX: 7.2 V TX: 6.9 V RX: 7.1 V TX: 6.9 V RX: 7.1 V TX: 0.5 V RX: 6.4 V TX: 6.9 V RX: 0 V TX: 6.9 V RX: 0.6 V TX: 0 V RX: 7.2 V TX: 6.9 V 3.0 V 0 V 2.9 V 0 V 2.5 V RX: 7.2 V TX: 6.9 V RX: 2.5 V TX: 2.4 V RX: 0 V TX: 2.4 V 2.5 V 2.4 V 2.4 V RX: 2.4

26、 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

27、.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 RX: 5.0 V TX: 0 V RX: 4.1 V TX: 0 V RX: 0.7 V TX: 0 V RX: 4.6 V TX: 0 V RX: 0.4 V TX: 0 V 0 V RX: 0 V TX: 1.1 V RX: 0 V TX: 1.1 V RX: 0 V TX: 5.0 V RX: 0 V TX: 1.2 V RX: 0 V TX: 1.2 V RX: 0

28、 V TX: 3.5 V RX: 0 V TX: 2.8 V RX: 0.7 V TX: 0 V RX: 1.9 V TX: 0 V RX: 1.9 V TX: 0.8 V RX: 5.3 V TX: 5.2 V RX: 2.0 V TX: 4.0 V 1.4 V 1.4 V 1.4 V 1.4 V RX: 4.8 V TX: 4.7 V 2.4 V 2.9 V 0.9 V RX: 0 V TX: 2.9 V 0 V0 V RX: 0 V TX: 1.2 V 0 V 2.9 V 3.0 V 3.0 V 3.0 V RX: 3.0 V TX: 0 V RX: 0 V TX: 3.0 V RX:

29、3.0 V TX: 0 V RX: 0 V TX: 3.0 V RX: 0 V TX: 1.7 V 1.3 V 14 MAIN Unit Note 15 MAIN Unit Parts Layout (Side A) BADCFEG 1 3 2 4 H BR24L64F (Q1042) BD4845FVE (Q1021) DTC143ZE (E23) (Q1005) S-812C30AMC (Q1010) HD64F38024 (Q1043) LM2904PWR (Q1003, 1050) RD07MVS1 (Q1036) UMD2N (D2) (Q1039) DA221 (K) (D1009

30、, 1025) 1SS321 (F9) (D1032) 2SA1774 (FR) (Q1019) FMMTL718 (Q1014) 2SC4617 (BR) (Q1006, 1016, 1026, 1029, 1032) 2SC5374 (NA) (Q1045) FMMTL618 (Q1028) M62364FP (Q1030) 16 MAIN Unit Parts Layout (Side B) badcfe g 1 3 2 4 h 2SA1774 (FR) (Q1011, 1024) FMMTL718 (Q1017) 2SC4400 (RT4) (Q1037) 2SC4617 (BR) (

31、Q1001, 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)

32、(Q1034) 3SK320 (U7) (Q1041) DTA114TE (94) (Q1002) DTA144EE (16) (Q1007) LM2904PWR (Q1052) LM2902PWR (Q1051) 17 REFDESCRIPTIONVALUEV/WTOL.MFRS DESIGVXSTD P/NVERS.LOTSIDELAY ADR Parts List MAIN Unit PCB with ComponentsCB2718001CE OFF, DST USA CB2718002CE OFF, DST EXP CB2718003CE ON, DST EU Printed Cir

33、cuit BoardAM007N000FR01139001- C 1001CHIP CAP.0.001uF50VBGRM36B102K50PTK221788091-AB1 C 1002CHIP CAP.0.001uF50VBGRM36B102K50PTK221788091-AB1 C 1003CHIP CAP.0.001uF50VBGRM36B102K50PTK221788091-Bf1 C 1004CHIP TA.CAP.10uF10VTEMSVA1A106M-8RK781000281-Bb2 C 1005CHIP CAP.0.001uF50VBGRM36B102K50PTK22178809

34、1-Bf1 C 1006CHIP CAP.0.001uF50VBGRM36B102K50PTK221788091-Be1 C 1007CHIP CAP.0.0047uF25VBGRM36B472K25PTK221488301-Be1 C 1008CHIP TA.CAP.10uF10VTEMSVA1A106M-8RK781000281-Ba3 C 1009CHIP CAP.0.01uF16VBGRM36B103K16PTK221288041-Ba3 C 1010CHIP CAP.0.01uF16VBGRM36B103K16PTK221288041-Be2 C 1011CHIP CAP.0.001

35、uF50VBGRM36B102K50PTK221788091-Be1 C 1012CHIP CAP.0.001uF50VBGRM36B102K50PTK221788091-Bf1 C 1013CHIP CAP.0.001uF50VBGRM36B102K50PTK221788091-AB2 C 1014CHIP CAP.0.001uF50VBGRM36B102K50PTK221788091-Bf1 C 1015CHIP CAP.0.001uF50VBGRM36B102K50PTK221788091-AB2 C 1016CHIP TA.CAP.22uF6.3VTEMSVA0J226M-8RK780

36、800471-Be1 C 1017CHIP CAP.0.001uF50VBGRM36B102K50PTK221788091-Be1 C 1018CHIP CAP.0.001uF50VBGRM36B102K50PTK221788091-Bg1 C 1019AL.ELECTRO.CAP.100uFRVZ-10V101MF55U-R2K481000081-Bg2 C 1022AL.ELECTRO.CAP.100uFRVZ-10V101MF55U-R2K481000081-Bg1 C 1023CHIP CAP.0.1uF10VBGRM36B104K10PTK221088021-AA1 C 1024CH

37、IP CAP.0.1uF10VBGRM36B104K10PTK221088021-Bg2 C 1025CHIP CAP.0.1uF10VBGRM36B104K10PTK221088021-Bf2 C 1026CHIP CAP.0.047uF10VBGRM36B473K10PTK221088011-Bf1 C 1027CHIP CAP.0.001uF50VBGRM36B102K50PTK221788091-Bb3 C 1028CHIP CAP.0.001uF50VBGRM36B102K50PTK221788091-Bc3 C 1029CHIP CAP.0.22uF10VBGRM39B224K10

38、PTK221048011-Bb4 C 1030CHIP CAP.0.001uF50VBGRM36B102K50PTK221788091-Be2 C 1031AL.ELECTRO.CAP.100uF16VECEV1CA101WPK481200121-Bh2 C 1032CHIP CAP.0.001uF50VBGRM36B102K50PTK221788091-Bf1 C 1033CHIP CAP.0.5pF50VCKGRM36CK0R5B50PTK221782851-Bb3 C 1034CHIP CAP.0.001uF50VBGRM36B102K50PTK221788091-Bb3 C 1035C

39、HIP CAP.15pF50VCHUMK105CH150JW-FK221782621-Bb3 C 1036CHIP CAP.0.001uF50VBGRM36B102K50PTK221788091-Bg2 C 1037CHIP CAP.0.001uF50VBGRM36B102K50PTK221788091-Bb3 C 1038CHIP CAP.0.047uF10VBGRM36B473K10PTK221088011-Bb4 C 1039CHIP CAP.180pF25VCHTMK105CH181JW-FK221482441-Bf1 C 1040CHIP CAP.0.22uF10VBGRM39B22

40、4K10PTK221048011-Bb4 C 1041CHIP TA.CAP.22uF6.3VTEMSVA0J226M-8RK780800471-Be1 C 1042CHIP CAP.18pF50VCHUMK105CH180JW-FK221782641-Bb3 C 1043CHIP CAP.20pF50VCHUMK105CH200JW-FK221782651-Bb3 C 1044CHIP CAP.0.001uF50VBGRM36B102K50PTK221788091-Bb3 C 1045CHIP CAP.0.001uF50VBGRM36B102K50PTK221788091-Be2 C 104

41、6CHIP CAP.0.1uF10VBGRM36B104K10PTK221088021-Bf1 C 1047CHIP CAP.1uF6.3VBGRM39B105K6.3PTK220848011-Bb3 C 1048CHIP TA.CAP.4.7uF16VTEMSVA1C475M-8RK781200311-Bb4 C 1049CHIP TA.CAP.10uF10VTEMSVA1A106M-8RK781000281-Bf2 C 1050CHIP CAP.0.1uF10VBGRM36B104K10PTK221088021-Bf2 C 1052CHIP CAP.0.001uF50VBGRM36B102

42、K50PTK221788091-AA2 C 1053CHIP CAP.0.001uF50VBGRM36B102K50PTK221788091-Bc3 C 1054CHIP TA.CAP.10uF10VTEMSVA1A106M-8RK781000281-Ba4 C 1055CHIP TA.CAP.10uF10VTEMSVA1A106M-8RK781000281-Bb4 C 1057CHIP CAP.1.5pF50VCKUMK105CK1R5CW-FK221782491-Bb3 C 1058CHIP TA.CAP.220uF4VSK4-0G227M-RDK780600141-AB1 C 1059C

43、HIP CAP.0.01uF16VBGRM36B103K16PTK221288041-AC2 C 1060CHIP CAP.0.001uF50VBGRM36B102K50PTK221788091-Bc3 C 1061CHIP CAP.0.001uF50VBGRM36B102K50PTK221788091-Ba4 C 1062CHIP CAP.47pF50VCHUMK105CH470JW-FK221782741-Bb3 C 1063CHIP CAP.0.01uF16VBGRM36B103K16PTK221288041-Bb4 C 1064CHIP CAP.0.001uF50VBGRM36B102

44、K50PTK221788091-Bb3 C 1065CHIP CAP.47pF50VCHUMK105CH470JW-FK221782741-Bb3 C 1066CHIP CAP.0.001uF50VBGRM36B102K50PTK221788091-Bg1 C 1067CHIP CAP.0.001uF50VBGRM36B102K50PTK221788091-Bg2 C 1068CHIP CAP.0.001uF50VBGRM36B102K50PTK221788091-Bf1 C 1069CHIP CAP.47pF50VCHUMK105CH470JW-FK221782741-Bb3 C 1070C

45、HIP TA.CAP.10uF10VTEMSVA1A106M-8RK781000281-Bh1 C 1071AL.ELECTRO.CAP.100uF16VECEV1CA101WPK481200121-Bg2 C 1072CHIP CAP.820pF50VBGRM36B821K50PTK221788081-Bf2 C 1073CHIP CAP.560pF50VBGRM36B561K50PTK221788061-Bf2 18 Parts List MAIN Unit REFDESCRIPTIONVALUEV/WTOL.MFRS DESIGVXSTD P/NVERS.LOTSIDELAY ADR C

46、 1074CHIP TA.CAP.4.7uF16VTEMSVA1C475M-8RK781200311-AA2 C 1075CHIP TA.CAP.4.7uF16VTEMSVA1C475M-8RK781200311-AA2 C 1076CHIP CAP.0.001uF50VBGRM36B102K50PTK221788091-Bc4 C 1077CHIP CAP.5pF50VCHUMK105CH050CW-FK221782531-Ba3 C 1078CHIP CAP.5pF50VCHUMK105CH050CW-FK221782531-Ba3 C 1079CHIP CAP.15pF50VCHUMK1

47、05CH150JW-FK221782621-Ba3 C 1081CHIP CAP.47pF50VCHUMK105CH470JW-FK221782741-Bc4 C 1082CHIP CAP.0.22uF10VBGRM39B224K10PTK221048011-Bg1 C 1083CHIP CAP.47pF50VCHGRM36CH470J50PTK221782281-Ba3 C 1084CHIP CAP.0.001uF50VBGRM36B102K50PTK221788091-Bg1 C 1086CHIP CAP.0.022uF16VBGRM36B223K16PTK221288061-AE3 C

48、1087CHIP CAP.0.001uF50VBGRM36B102K50PTK221788091-Bc4 C 1088CHIP CAP.5pF50VCHUMK105CH050CW-FK221782531-Bc4 C 1089CHIP CAP.5pF50VCHUMK105CH050CW-FK221782531-Bc4 C 1090CHIP CAP.0.001uF50VBGRM36B102K50PTK221788091-AA1 C 1091CHIP CAP.0.001uF50VBGRM36B102K50PTK221788091-Bf2 C 1092CHIP CAP.5pF50VCHUMK105CH

49、050CW-FK221782531-Bc4 C 1093CHIP CAP.0.001uF50VBGRM36B102K50PTK221788091-Ba3 C 1094CHIP CAP.100pF50VCHUMK105CH101JW-FK221782821-Ba3 C 1095CHIP CAP.0.0033uF50VBGRM36B332K50PTK221788151-Bf2 C 1096CHIP CAP.120pF50VCHGRM36CH121J50PTK221782381-Bf2 C 1097CHIP CAP.0.1uF10VBGRM36B104K10PTK221088021-AA1 C 1100CHIP CAP.1uF10VFGRM39F105Z10PTK221050011-Be2 C 1101CHIP CAP.0.001uF50VBGRM36B102K50PTK221788091-Bg2 C 1102CHIP CAP.0.001uF50VBGRM36B102K50PTK221788091-Bd4 C 1103CHIP CAP.0.1uF10VBGRM36B104K10PTK221088021-AA1 C 1104CHIP CAP.0.001uF50VBGRM36B102K50PTK221788091-AB1 C 1106CHIP CAP.0.001uF5