IC-910H_serv.pdf

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1、SERVICE MANUAL VHF/UHF ALL MODE TRANSCEIVER i910H INTRODUCTION This service manual describes the latest service information for the IC-910H VHF/UHF ALL MODE TRANSCEIVER at the time of publication. VERSION No. #02 #04 #06 #07 VERSION Europe Australia U.S.A. Korea SYMBOL EUR AUS USA-1 KOR To upgrade q

2、uality, any electrical or mechanical parts and internal circuits are subject to change without notice or obligation. DANGER NEVER connect the transceiver to an AC outlet or to a DC power supply that uses more than 16 V. This will ruin the transceiver. DO NOT expose the transceiver to rain, snow or a

3、ny liquids. DO NOT reverse the polarities of the power supply when connecting the transceiver. DO NOT apply an RF signal of more than 20 dBm (100 mW) to the antenna connector. This could damage the transceiv- ers front end. ORDERING PARTS Be sure to include the following four points when ordering re

4、placement parts: 1. 10-digit order numbers 2. Component part number and name 3. Equipment model name and unit name 4. Quantity required 1110003140ICLA1150NIC-910H MAIN UNIT 5 pieces 8810005770 ScrewBiH M38 ZKIC-910H Cover10 pieces Addresses are provided on the inside back cover for your convenience.

5、 REPAIR NOTES 1. Make sure a problem is internal before disassembling the transceiver. 2. DO NOT open the transceiver until the transceiver is disconnected from its power source. 3. DO NOT force any of the variable components. Turn them slowly and smoothly. 4. DO NOT short any circuits or electronic

6、 parts. An insu- lated tuning tool MUST be used for all adjustments. 5. DO NOT keep power ON for a long time when the trans- ceiver is defective. 6. DO NOT transmit power into a signal generator or a sweep generator. 7. ALWAYS connect a 50 dB to 60 dB attenuator between the transceiver and a deviati

7、on meter or spectrum ana- lyzer when using such test equipment. 8. READ the instructions of test equipment thoroughly before connecting equipment to the transceiver. SECTION 1SPECIFICATIONS SECTION 2INSIDE VIEWS 2 - 1IC-910H . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 1 2 - 2UX-910 (OPTIONAL UNIT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 3 SECTION 3DISASSEMBLY AND OPTION INSTRUCTIONS SECTION 4CIRCUIT DESCRIPTION SECTI

9、ON 5ADJUSTMENT PROCEDURES SECTION 6PARTS LIST SECTION 7MECHANICAL PARTS SECTION 8SEMI-CONDUCTOR INFORMATION SECTION 9BOARD LAYOUTS 9 - 1VR-A BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 - 1 9 - 2VR-B BOA

10、RD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 - 1 9 - 3RIT BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 - 1

11、9 - 4FUNC BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 - 3 9 - 5MIC BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

12、 . . 9 - 3 9 - 6JACK BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 - 3 9 - 7DRV BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

13、. . . . . . . . 9 - 3 9 - 8VARISTOR-A BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 - 3 9 - 9VARISTOR-B BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

14、. . . . . . . . 9 - 3 9 - 10 VARISTOR-C BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 - 3 9 - 11 DISPLAY BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

15、 . . . . . . . . . . . 9 - 5 9 - 12 PA UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 - 7 9 - 13 PLL UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

16、. . . . . . . . . . . . . . . . . . . . . . . . 9 - 9 9 - 14 MAIN UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 - 11 9 - 15 UX-910 MAIN UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 - 13 SECTION 10BLOCK DIAGRAMS 10 - 1 MAIN UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 - 1 10 - 2 PA AND PLL UNITS . . . . . . . . . . .

18、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 - 2 10 - 3 FRONT UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 - 3 10 - 4 UX-910 . . . . . . . . . . .

19、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 - 3 SECTION 11WIRING DIAGRAM SECTION 12VOLTAGE DIAGRAMS 12 - 1 FRONT UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

20、 . . . . . . . . . . . . . . 12 - 1 12 - 2 PLL UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 - 2 12 - 3 PA UNIT (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

21、. . . . . . . . . . . . . . . . . . . . . . . . . . 12 - 3 12 - 4 PA UNIT (2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 - 4 12 - 5 MAIN UNIT (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

22、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 - 5 12 - 6 MAIN UNIT (2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 - 6 12 - 7 MAIN UNIT (3) . . . . . . . . . . . . . . . . . . . . .

23、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 - 6 12 - 8 UX-910 MAIN UNIT (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 - 7 12 - 9 UX-910 MAIN UNIT (2) . . . . . . . . . . . .

24、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 - 8 TABLE OF CONTENTS SECTION 1SPECIFICATIONS 1 - 1 I GENERAL Frequency coverage:(Unit: MHz) *1Optional UX-910 is installed. *2Guaranteed range is 144.0148.0 MHz. *3Guaranteed range is 430.0450.0 MHz. *4

25、Guaranteed range is 1240.01300.0 MHz. Mode: USB, LSB, CW, FM, FM-N* *Not available in 1200 MHz band No. of memory Ch.: 212 (99 regular, 6 scan edges, 1 calls for each band) plus 10 satellite memories) Antenna connector: SO-239 (50 ; VHF) Type-N (50 ; UHF) Usable temp. range: 10C to +60C; +14F to +14

26、0F Frequency stability: Less than 3 ppm (10 to 60C; +14 to +140F) Frequency resolution: 1 Hz minimum Power supply: 13.8 V DC 15% (negative ground) Current drain (at 13.8 V DC): TransmitMax. power23.0 A ReceiveStandby2.0 A (3.0 A with UX-910) Max. audio2.5 A (3.5 A with UX-910) Dimensions : 241(W) 94

27、(H) 239(D) mm (projections not included)912(W) 31116(H) 91332(D) in Weight (approx.): 4.5 kg; 10 lb (with UX-910: 5.35 kg; 11 lb 13 oz) ACC 1 connector: 8-pin DIN connector CI-V connector: 2-conductor 3.5 (d) mm (18) DATA connectors: 6-pin mini DIN 2 (for MAIN and SUB) I TRANSMITTER Output power: (c

28、ontinuously adjustable) 144 MHz 5100 W 430 (440) MHz 575 W 1200 MHz 110 W (with UX-910) Modulation system: SSBBalanced modulation FMVariable reactance modulation Spurious emission: 144/430 (440) MHz More than 60 dB 1200 MHzMore than 50 dB Carrier suppression: More than 40 dB Unwanted sideband : More

29、 than 40 dB suppression Microphone connector: 8-pin connector (600 ) KEY connector: 3-conductor 3.5(d) mm (14) Version144 MHz430 (440) MHz1200 MHz*1 U.S.A. Tx: 144.0148.0Tx: 430.0450.0Tx: 1240.01300.0 Rx: 136.0174.0*2Rx: 420.0480.0*3Rx: 1240.01320.0*4 Europe144.0146.0430.0440.01240.01300.0 Australia

30、144.0148.0430.0450.01240.01300.0 Korea144.0146.0430.0440.01260.01300.0 All stated specifications are subject to change without notice or obligation. I RECEIVER Receive system: VHFSSB, CWSingle conversion superheterodyne FMDouble conversion superheterodyne UHFSSB, CWDouble conversion superheterodyne

31、FMTriple conversion superheterodyne Intermediate frequencies:(Unit: MHz) Sensitivity: SSB, CW (10 dB S/N)Less than 0.11 V FM (12 dB SINAD)Less than 0.18 V Squelch sensitivity: SSB, CWLess than 1.0 V (threshold)FMLess than 0.18 V Selectivity: SSB, CWMore than 2.3 kHz/6 dB Less than 4.2 kHz/60 dB* FM

32、More than 15.0 kHz/6 dB Less than 30.0 kHz/60 dB* FM-N More than 6.0 kHz/6 dB Less than 18.0 kHz/36 dB CW-N More than 0.5 kHz/6 dB (w/FL-132 or FL-133)Less than 1.34 kHz/60 dB* *Except 1200 MHz band Spurious and image rejection ratio: 144/430 (440) MHzMore than 60 dB 1200 MHzMore than 50 dB AF outpu

33、t power (at 13.8 V DC): More than 2.0 W at 10% distortion with an 8 load RIT variable range : 144/430 (440) MHz1.0 kHz (SSB, CW) 5.0 kHz (FM) 1200 MHz2.0 kHz (SSB, CW) 10.0 kHz (FM) IF SHIFT variable range: More than 1.2 kHz PHONES connector: 3-conductor 6.35(d) mm (14) Ext. SP connectors: 2-conduct

34、or 3.5 (d) mm (18) /8 2 (for MAIN and SUB) MAIN BANDSUB BAND 1st2nd3rd1st2nd3rd SSB10.850010.9500 CW10.849110.9491 FM10.85000.45510.95000.455 SSB71.250010.850071.350010.9500 CW71.249110.849171.349110.9491 FM71.250010.85000.45571.350010.95000.455 SSB243.950010.8500243.950010.9500 CW243.949110.8491243

35、.949110.9491 FM243.950010.85000.455243.950010.95000.455 144 MHz 430 (440) MHz 1200 MHz 1 - 2 2 - 1 SECTION 2INSIDE VIEWS 2-1 IC-910H MAIN AND PLL UNITS DDS IC (IC701: SC-1287) DDS gate array (IC131: SC-1246A) DDS gate array (IC331: SC-1246A) PLL unit 144 MHz band VCO circuit 430 MHz band VCO circuit

36、 Reference oscillator (X512: CR-452 30.2 MHz) Driver IC (IC1: BU4094BCF) DDS IC (IC601: SC-1287) AF power amplifier (IC1852: LA4445) MAIN unit * Located under side of the point FM IF IC (IC951: TA31136FN) D/A converter (IC1521: M62352GP) Analog master IC* (IC1701: PC5023-077) FM IF IC (IC401: TA3113

37、6FN) Crystal band pass filter (FI751: FL-129) Crystal band pass filter (FI151: FL-128) TX IF amplifier* (Q1: 3SK131) 2 - 2 PA UNIT TX balanced mixer Q501, Q502: 2SK302 D502: 1SV286 RX balanced mixer (Q511, Q512: 2SK1740) Pre-amplifier (Q507: 3SK177) 145 MHz power amplifier (Q651, Q652: 2SC5152) TX/R

38、X switching relay (RL700: AE5349) Varistor-A board Varistor-C board 440 MHz power amplifier (Q151, Q152: 2SC3102) TX balanced mixer* (Q1, Q2: 2SK302) Pre-amplifier (Q260: 3SK177) RX balanced mixer (Q220, Q221: 2SC3356) DRV board Drive amplifier (Q131: SRFJ7044) * Located under side of the point Vari

39、stor-B board TX double balanced mixer D190: HSB88WS L190, L191: 617DB-1010 2 - 3 2-2 UX-910 (OPTIONAL UNIT) TOP VIEW BOTTOM VIEW Power module IC (IC21: M57762-02) 1st LO VCO circuit PLL IC (IC501: TB31242) DDS IC (IC661: SC-1246A) RF pre-amplifier (Q281: NE34018) Power supply circuit for AG-1200 Q72

40、: DTC144EU Q73, Q74: 2SC2712 RF amplifier (Q271: 2SC5454) YGR amplifier (IC141: PC1878G) TX 1st mixer (IC131: PC8163TB) RX 1st mixer (IC241: PC2721) TX 1st IF amplifier (IC111: PC2709) RX 2nd mixer (Q221: 3SK166) TX 2nd mixer (D82: HSB88WS) 2nd LO VCO circuit Power supply circuit for AG-1200 (Q71: 2

41、SD1801) Pre-drive amplifier (Q36: 2SK2354) 2nd IF amplifier (Q81: 2SC2712) Divider (IC610: TC7W74FU) Reference amplifier (IC601: TC7SU04F) Drive amplifier (Q38: 2SK2855) SECTION 3DISASSEMBLY AND OPTION INSTRUCTIONS Opening the transceivers case Follow the case and cover opening procedures shown here

42、 when you want to install an optional unit or adjust the internal units, etc. q Remove the 5 screws from the top of the trans- ceiver and 4 screws from the sides, then lift up the top cover. w Turn the transceiver upside down. e Remove 5 screws from the bottom of the trans- ceiver, then lift up the

43、bottom cover. CAUTION:DISCONNECT the DC power cable from the transceiver before performing any work on the transceiver. Otherwise, there is a danger of electric shock and/or equipment damage. UX-910 1200MHz BAND UNIT q Remove the bottom cover as shown above. w Remove the antenna plate from the chass

44、is using a stan- dard screw driver. WARNING! NEVER attempt to remove the antenna plate using your finger, this may result in injury. e Connect the FFC (Flexible Flat Cable) of the UX-910 to J2 on the MAIN unit, DC power cable to the power connector (W305) from the PA unit and the coaxi- al cable to

45、J541 on the PLL unit. CAUTION NEVER catch the cables from the optional DSP unit(s) between chassis and the UX-910, this may damage the DSP unit(s) and/or transceiver. J541 J2 UX-910 PLL unit Power connector DC power cable Coaxial cable Flexible flat cable Disconnect the speaker cable. r Place the UX

46、-910 using the supplied 4 screws. BE CAREFUL not to drop the supplied screws inside the transceiver. Antenna plate UX-910 Turn the flexible flat cable up under the UX-910. J2 MAIN unit Flexible flat cable UX-910 t Return the bottom cover to its original position. 3 - 1 Opening the PA unit cover q Re

47、move the top cover as shown in the diagram on p. 3- 1. w Remove 8 screws and grounding plate from the PA unit cover. e Remove fastening tape from the inside power cable. grounding plate FL-132/FL-133 CW NARROW FILTER q Remove the bottom cover as shown in the diagram on p. 3-1. Remove the UX-910 if y

48、ou have installed it. (p. 3-1) w Disconnect the connection cable connectors from J501 and J1051 on the MAIN unit. e Remove 2 clips. WARNING! BE CAREFUL not to pinch your finger with the clip. r Remove 6 screws from the MAIN unit, then lift up the MAIN unit. PLL unit MAIN unit J1051 J501 Clips r Slid

49、e the PA unit cover as shown below. t Install FL-132 or FL-133 to the specified position on the MAIN unit. FL-132 (MAIN) FL-133 (SUB) y Solder then cut the leads, keeping 23 mm (1/8) of the leads from the bottom of the MAIN unit. u Return the MAIN unit and clips to their original positions. i Re-connect the connection cable connector to J501 and J1051 on the MAIN unit. o Return the bottom cover to the original position. (MAIN) (SUB) 3 - 2 UT-102 VOICE SYNTHESIZER UNIT q Remove the bottom cover as shown in the diagram on p. 3-1. Remov