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IC-2GA-T-GE

1. GNO HV A vec A voL2 D202 sau 2 QLCO 250 IOKB v i o SOL I L Iz c v 6 9 p Y a a a 51515 5151515 M 8 8 5 3 4 5 UNLK O PLL O O TSOL DATA 5 lol 40 i CALL 5 HL 55 FUNC ala MONI 1 815 2 0213 25 2712 021 25 4081 0209 2562712 IC20 LAMP 2 JE 0214 25462 0212 2541576 0210 258909 LC40 GND 5 ed x z 81 35 Tx R TX OV TX RX 12 5V TX 5 0V 384 5 58 5 X RX 12 5V RX 5 0V LS RX 0V Q214 Q210 5 5 9213 12203 0 IC203 C IC203 B TX RX 5 0V 4 eJ 0206 TX RX 5 0V 0204 MONITOR 155190 5 M x or x 515 S lt TXRCABV E TX RX OV Pa 5 ST 859 2 C263 470 RX 5 0V 8 x R219 100K N o d O S METER L HIGH POWER A 111 5 3 5 C507 330P 5 470P oT 2 N X 0 8 m RX 4 4V 5 X OV RX 0 6v 8 TX OV 8 TX OV TX OV m RX 4 8V IC201 RX 42V RX 4 0V 7 2 N 84526 R205 5 i N23 5 4 7K ei 9206 XT TX 0V R RX 8 TX RX OV ST rcov N sess 3 MS TX R o Q503 25 1362 BACK UP 5 2V D502 DAN202U PD
2. Spring lock plate 8930005700 Self tapping screw BH M3 x 6 8810002860 Top cover 8010001040 Contact pin 8930006140 Spring A 1 8930007220 P C Board 0910004414 green wire 9037701001 Wire crimped lug red wire 9037701007 Spring washer M2 6 8850000410 Nut M2 6 8830000180 9 Pan head screw M3 x 6 8810001350 02 TP 34 5910000220 Transformer 03 36 5910000240 05 41 5910000270 Self tapping screw M3 x 6 8810002870 P C Board B 439D 0910004414 4 Heatsink 8410000070 Chassis 02 03 04 8010001860 Chassis A 05 8010003340 Rubber foot SK 136 8930002820 Self tapping screw M2 6 x 6 8810001590 Set screw c 4 x 8 8810003390 Power switch SDJ2S 2260000010 5 Fuse holder S N5051 5220000020 D ril 02 03 05 FGB 2A 5210000040 Fuse 04 3SF2 2A 5210000160 e Nut M4 8830000110 S washer M4 8850000430 amp Flat washer M4 8850000140 8810002870 Transformer 04 TP 35 5910000230 e Transformer base A 8930006810 e Pan head screw M4 x 10 8810000380 e Transformer base B 8930002010 Flat washer M3 8850000130 vor aa 860000130 Screw type Screw M2 x 6 etc Self tapping screw BO 2 x 4 etc Precision type screw No 0 1 Screw head style PH Pan head BH Button head FH Flat head Headless hex head TRANSFORMER UNIT BC 36 04 only 9 9 Kk D
3. WX 22 3 25 302 TX RX OV 25 3772 RF UNIT 26 56 8 is 5 m 93 23 cie 0 5 45 324 NOSE 2563770 19 219 xi TAK TX OV LS 354 15M15B4 15 262 R 2 1 RX 0 8V 1 ae 1 825 e 40 34 0 001 vM 864 5 3 1K 41 1 1518 vts 5 4 L3 cs mE 1 13 875 8 65575 2 22P LA 226 LA 227 0 001 14 234 LA 235 cz SE fol g d 1 4 1 34 47k 22 2 R3 100K 15 8 a LS 321 xis amp 5 a 8 548 820218 8 228 52975 5 a el M gt 5 5 5 Tx i Me 5 M lt R7330 522K p OPEN CLOSE D605v 05 560 na RX 43V ROBY 5 2712 2 0924 5 DTCI44EU DTCI44EU OTCI44EU a x Tx 38 HIGH 2 9V Tx 2 28 HIGH LOW 5 0V 8 LOW ev RX OV g amp R64 100 0 00 2sc3772 0 8 015 o RLV 1 3 s 1080 158153 13 9 vec vB 8 9 4 uh TS 1 DN 13 2V 14 22 5 Rox 5 x toPr T T e 8 8 3 1 H i o 5 47 1252 T ay s z R Je hm 335 o 8 Reals seg 0 001 070 c84 33P 4 RTS S S 3548 i 3 5 5 amp 5
4. 2 9 5 E 22 22 3 9 zx J 8 PONE B o 3 e 10503 E 504 PD75308C 22222221 0 2 5 o K M gt T SE LL o 0 19 0 883 R528 220K HE t 7A x Qn 5 5 S METER 18 IE 8 4 t 155 r 7 sig POWER 188 825 3 IC502 1 2 507 470 I I 8508 5 9 2 0 5 1650 5 S8054ALB 52 LS R530 1M 1 I 100K UP 1 I 1 1 2541162 5 7 1 0504 257 0503 I I DTC144EU 25 1362 1 R516 47 BACK UP 1 5 2V I I 0502 I DAN202U NES I T ge Sas 8 95 m 5 ee R508 2 9 220 2 5 Pm 8 5 o INITIAL MATRICES 10 2 8 1 502 1 2 5 26 9 16 26 9 1 26 51 2 EUROPE LSP 2 S EASIA 2 2 AUSTRALIA 1 r TX 0 4V D504 23V RX OV 8 D505 ii a 2 1 IC502 LA6393M III l 0506 155196 0504 155196 0504 155196 2504 155193 0505 155196 0506 155196 0505 155196 0508 155254 0506 155196
5. e 12 4 ir 8 5 31 8 502 1 2 s o 8 _Tx 0 4v RX OV SPEAKER J20t JACK MIC J202 JACK C210 0 001 SH C204 202 SA 0204 25 4081 Q205 2SB909M TX OV RX 9 0V C213 47P C231 470P gt C232 470P R223 47K TX RX 5 2V R221 27 5 6K TX RX 4 6V C229 470P 8224 33K lt C224 470P 3 4 Q206 28J106 IC205 5218 00 R228 235 0 H ic R234 16 R230 180K C239 0 22 47K TX 2 9V RX OV R235 27 P202 0202 DAN202U MAIN UNIT BATTERY PACK C246 0 1 4207 T 5 FI a 583 Lo Low lal 4208 C45 0 00 Q207 2SA1162 9209 25 2712 1C203 Q210 2S8909M LC400 BM TX Rx 12 5V TX 5 0V RX OV Q210 IC203 B 0220 2SC4081 IC204 581250HG 5 3 2v 8 ats s F 5 09909999999 tt C269 470P E bee E R251 R248 39K 39K re 27v ess Lo 55 Tg B i wx s e E C g Qo 9 IC202 z C408 9206 01 uPD4094
6. 37 1 i Lu R68 R72 OUTPUT POWER OUTPUT POWER ADJUSTMENT ADJUSTMENT SPEAKER AND DTMF UNITS L DEVIATION ADJUSTMENT DTMF UNIT IC 2GAT only SECTION 7 BOARD LAYOUTS 1 5 _ encc ewo ex oara ve vee gusv Lame 100 kHz MHz UP DN UP DN SWITCH SWITCH JOkHz UP DN SWITCH wR SwITCH V M SWITCH LOGIC A UNIT B 1564C TRANSMIT INDICATOR CALL Fos rss SQUELCH CONTROL CALL SWITCH IC 2GA IC 2GAT TONE CALL Er a soe SWITCH IC 2GE LOGICB UNIT B 1565B MONI SWITCH PTT UNIT B 1562 B 1552C voL NS 4209 TONE UNIT B 1566B IC 2GAT only TONE SQUELCH UNIT OPTION UT 40 7 1 INTERCONNECTION SPEAKER UNIT MIC UNIT C268 fx Ter sc RF UNIT B 1585C c N VCO UNIT B 1586B MAIN UNIT B 1562B voci wic orwe oTwro 3 995550 0896990920K JUNCTION UNIT DTMF UNIT B 1570C 8 15678 IC 2GAT only N uic ouo voc 7 2 LOGIC A UNIT COMPONENT SIDE FOIL SIDE EN
7. 0 1 pF GRM40 F 47 pF GRM40 Versions 02 04 GRM40 Versions 02 04 GRM40 Versions 02 04 GRM40 Versions 02 04 50 V MS5 Versions 02 04 0 01 uF GRM40 F 222K 0 0022 uF GRM40 B 50PT 0 001 uF GRM40 0 1 pF GRM40 F 47 uF 6 3V MS7 470 pF GRM40 470 pF GRM40 470 pF GRM40 470 pF GRM40 470 pF GRM40 470 pF GRM40 470 pF GRM40 470 pF GRM40 470 pF GRM40 470 pF GRM40 470 pF GRM40 470 pF 50 V 0 1 pF 470 pF 10 pF 10 pF 0 001 pF 0 1 pF GRM40 GRM40 GRM40 GRM40 GRM40 GRM40 GRM40 GRM40 GRM40 470 pF 470 pF 470 pF 470 pF 470 pF 470 pF 470 pF 470 pF 470 pF Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic HSJ0836 01 010 Speaker Jack HSJ1102 01 540 Mic Jack PI28A02M PI28A04M 128 04 4128 0121 10F M R 4 10F M R 28 06 2 4 1 TZB P06H A1 Versions 05 06 07 08 09 2 4 1 Versions 05 06 07 08 09 Connector Connector Connector Connector Connector Connector Connector Connector Connector Connector Connector PI28A10F Versions 05 06 07 08 09 PI28A02F PI28A04F PI28A04F Connector Connector Connector Connector KUC2023 01 006 Microphone Switch Switch Switch Switch Switch SKHLADO35A HI LOW SKHLADO035A MONI SKHMPD004A FUNC SKHMPD004A PTT SKHLAD035A CALL or TONE CALL Speaker Si36D04
8. ZA 60221 4001 NO LINON zA So OIN dS 2415262 211252 62 LINN uo 019 P 2 li 833408 OA JM uu 388 5 3v N en 24148952 2225252 24222 aa sors 210 s VNN31NV 341 33308 NE 19 TWO 1 9 192 21 392 7 LNY 3010 V 811341 rj 1 1 15 82 d4G 2N LII 042 2S2Z z lt x Q SECTION 4 CIRCUIT DESCRIPTION 4 1 RECEIVER CIRCUITS 1 ANTENNA SWITCHING CIRCUIT RF UNIT RF signals enter the antenna connector and pass through a series of Chebyshev low pass filters L1 L2 C1 C2 C6 C7 C8 The signals are then applied to the antenna switching circuit which employs a two stage diode switching system L3 L4 C5 C11 D1 2 RF CIRCUIT RF UNIT The signals from the antenna switching circuit are ampli fied at O1 Amplified signals are applied to a bandpass filter C17 C22 C25 D3 05 D6 16 18 where out of band signals are suppressed D2 D3 D5 and D6 are varactor diodes which track the bandpass filters with the PLL lock voltage 3 1st MIXER CIRCUI
9. 0 00 6 3 7 BOARD LAYOUTS 7 1 INTERCONNECTION 44 4 00000000000 7 1 7 2 LOGICA UNIT er 7 2 7 3 LOGIC B UNIT 7 3 7 4 RE UNIT 7 5 7 5 MAIN UNIT E 7 7 7 6 OTHER UNITS 7 9 8 PARTS LIST 8 1 9 SCHEMATIC AND VOLTAGE DIAGRAM 002 2222 24 2 440 40 nnne 9 1 10 BC 35 BC 36 AC BATTERY CHARGERS 10 1 SPECIFICATIONS m denat dadin 10 1 10 2 PANEL DESCRIPTION u 10 1 10 3 BLOCK DIAGRAM 10 2 10 4 CIRCUIT DESCRIPTION 10 3 10 5 MECHANICAL PARTS AND DISASSEMBLY 10 4 10 6 PARTS LIST 2 1 1 U U u 10 6 10 7 SCHEMATIC AND VOLTAGE DIAGRAM a 10 7 11 UT 40 TONE SOUELCH UNIT sold separately 11 1 CIRCUIT DESCRIPTION see Pru teh atate ane gauge 11 1 11 2 BOARD LAYOUT ien cerit tee lQ DEO Lis LER asa 11 2 11 3 SCHEMATIC
10. 8 pu SKIP MEMORY SKIP INDICATOR FREQUENCY DISPLAY MEMORY CHANNEL INDICATOR LOW POWER INDICATOR S RF INDICATOR 2 4 MAIN UNIT IC 2GAT IC 2GA de amphasis Audio filter circuit AF power amplifier 72146 N un 3 E Microphone amplifier circuit 3 TONE ENCODER UNIT C 2GAT IC 2GE 2 3 E 2 5 RFUNIT LPF antenna switching circuit modula 50 10801 Reference crystal 3 248 2 6 SPEAKER AND DTMF UNITS Speaker Microphone Bandpass filter 2nd IF circuit 2nd LO crystal 1 151 circuit UNIT PLL circuit PLL IC 172 PLL2001 ancadar crystal X amp 01 3 58 MHz DTMF UNIT IC 2GAT only LINN LINN 67971 213005 NOWWO2 ea 208911 114 vocrery 3A13038 gt JO yor yr NOTLdO Xi d 7JOHLNOO ANO 1992 21 LIWSNVEL p L LENVIS GHS6LG E LINN 398056404 0521 21901 Rao 2480 31 1082 ASAP Ed vox e w HW 928 vSz A NO 392 21 9 4280621 YOSN3S 90221 9 L MIO INN TW 3801 OIN da8lZGW 431713
11. 705 52234 cros 0 001 R78 18 8 o 2 8 49 lt 22K d EE amp 5 5 5 912 2 3 5 8 E 2293 0 5P 81240 e 8 o p S SLR 5 vA TN 25 3772 ses 8 7 7 i cA 8 ar 725 220 877 22K x Rx C geom 212220 J 2 Se TX RX 25 lt 4 R87 M R 938 2 5 5 gt 338 I J I 2SB909M 813 ero 862 0703 i 9 253772 337 28K210 2SC3772 iens tv TX RX 0V LOW 60V cios M 0 5 i VCO UNIT 8 oue mmm 5 RX OV 915 R49 8 2K 0 00 25 2712 H TX e _ Sle 25 HIGH 12 5V 278 28 LOW 12 07 21 9 p RX 13 0V 95 R80 33K C80 0 47 VOL NA TX RBO3 22K KEY 2 8V A 1285 KEY OFF 4 9V em IC801 RX OV LR40872 2 4 9 4 TX ON 4 KEY OFF 804 47K TX KEY ON 28V KEY OFF RX OV DTMF UNIT 1C 2GAT 7 25 271 2 KEY oN 0 8V KEY OFF 0V RX OV C806 470P R805 68K SECTION 10 35 BC 36 AC BATTERY CHARGERS 10 1 SPECIFICATIONS BC 35 BC 36 VERSIONS VERSION NUMBER POWER SUPPLY REQUIREMENT 02 USA 03 Europe 3 04 W Germany 05 Australia 117 V AC 50 60 Hz 240 V AC 50 60 Hz 220 V AC 50 H
12. ICOM SERVICE MANUAL VHF FM TRANSCEIVER Icom Inc INTRODUCTION This service manual contains the latest service information for the IC 2GA GAT GE VHF FM TRANSCEIVER at the time of going to press The following version numbers are often used in this maunal Southeast Asia o ooo co m ORDERING PARTS For the fastest service please supply all of the following information when ordering parts from your dealer or Icom Service Center Desired date of delivery 10 digit ordering number for mechanical parts only Part number and name Equipment model and unit name Quantity required Example 8810003850 No 0 3 PH B0 1 4 x 2 5 Ni screw IC 2GAT m unit 3 pcs REPAIR NOTE rw DO NOT open transceiver covers until the transceiver is discon nected from a power source DO NOT force any of the variable components Turn them slowly and smoothly DO NOT short any circuits or electronic parts An insulated tuning tool MUST BE used for all adjustments DO NOT keep power on for a long time when the transceiver is defective DO NOT transmit power into a signal generator or sweep gener ator Always connect a 30dB or 40dB attenuator between the transceiv er and a deviation meter or spectrum analyzer when using such test equipment Read the instructions of test equipment thoroughly before con necting the equipment to the transceiver
13. E 1 gold plated rectangle ta tha laft of C81 J REFERENCE FREQUENCY ADJUSTMENT FREQUENCY ADJUSTMENT 6 2 RECEIVER ADJUSTMENT 1 AC POWER SUPPLY Output voltaga Current capacity 2 STANDARD SIGNAL GENERATOR 555 Frequency range 0 1 180 MHz Output level 1277 17 dBm 0 1 uY 32 mY 3 DISTORTION METER Fraquency range Measuring range 13 2 V DC more DT kHzti10 1 10055 4 EXTERNAL SPEAKER Impedance 80 5 DC VOLTMETER Input impedance 50 or batter Fen Fen ET to BATTERY TERMINAL STANDARD SIGNAL GENERATOR to ANTENNA CONNECTOR To saparate tha RF LIMIT fram tha MAIN LIMIT sea tha diagram on p amp 1 fold out NOTE When tha sensitivity is batter than 0 25 12 dB SINADI on all frequencies tha following sansitivity adjustment is unnecessary Skip ta Wn SRF level indicator adjustment balew Frequency 145 00 MHz Receiving Apply an RF signal to the ANTENNA CONNECTOR Frequency 145 00 MHz Level o 118 dBm 0 25 Modulation 1 kHz Deviation 35 kHz s Squelch control maximum countar clockwise Same as above SRF LEVEL INDICATOR Apply an RF signal t the ANTENNA CONNECTOR Lave 101 dBm 2 0 Modulation 1 kHz Deviation 1 343 5 kHz RF UNIT SENSITIVITY ADJUSTMENT Connaet the voltmatar ta pin 7 Connect the distortion meter to t
14. T 500 500 msec msec msec 125 125 msec msec Using this data 12202 12 alternately outputs HIGH shut down for 500 msec and LOW standby for 125 msec This output applied to IC203D pins 5 and 6 and IC023C pin 9 controls the bases of O211 and Q213 thus controlling 5S and R 5 If a signal is received the BUSY signal becomes HIGH shutting off the power save function If a signal is not received HIGH and LOW signals continue to alternate 6 SUBAUDIBLE TONE ENCODER IC 2GA IC 2GAT When the tone encoder is turned on the X601 reference frequency 3 579545 MHz is divided by IC601 s dividing ratio based on 6 bit data from 1 503 tone 67 0 Hz 250 3 Hz is output from pin 1 The tone output passes through R601 for deviation adjustment and is supplied to the MAIN UNIT 7 TONE CALL IC 2GE Pushing the TONE CALL SWITCH S206 turns on Q218 A voltage is applied to IC206 1C206 divides 7 168 MHz by 4 096 and outputs a 1750 Hz tone through pin 4 R242 provides deviation adjustment 8 DTMF ENCODER IC 2GAT IC801 generates DTMF tone signals When transmitting T 5 V are applied to IC801 pins 1 and 2 If at this time data are entered with the keypad the frequency 3 58 MHz oscillated by X801 is divided by the appropriate dividing ratio Pin 17 outputs audio frequencies coresponding to ROW and COL input R801 provides deviation adjustment When a key is pushed a HIGH
15. 8930011950 LCD reflector 8010006980 No 0 3 PH BO 1 4 x 2 5 Ni 8810003850 LCD LD B9213J 5030000280 e Front switch plate 8930012130 eee LCD window plate 8310011530 Switch seal 05 06 07 08 09 8310011820 Switch seal B 02 04 8310011920 Speaker seal 8930011580 Front panel A 06 07 08 8210002950 PH M2 x 4 8810000010 Jack cover flap 8930011980 Antenna connector BNC R111 E includes nut 6510007130 8930012081 No 0 1 PH M2 x 8 ZK 8810004840 T T front panel 05 09 8210002880 Connection spring 8930005980 Front panel B 02 04 8210002960 BuH M2 x 6 Ni 8810002580 Knobs Power Volume Squelch N 126 8610004230 Release button 8930008610 Sliding guide 8010006990 PH M2 x 6 ZK 8810004860 FH M2 x 4 Ni 8810002310 VR nut E 8830000550 Screw lug M2 8860000010 Top panel 05 06 07 08 09 8310011520 Contact holder 8930011880 Top panel 02 04 8310011940 BuH M2 x 6 Ni 8810002580 Top panel seal 05 06 07 08 09 8210002870 02 04 8210003060 Screw type Head style of screws Screw M2 x 6 M2 x 3 etc PH Pan head BuH Button head FH Flat head 8930011970 Self tapping screw B0 2 x 4 B0 2 x 31 5 etc Latch plate A 1 The top panel is availab
16. using IC output as a reference voltage The heat factor of the voltage at 0207 Vac equals that of the junction voltage at Q208 The output is stable even with regard to tempera ture changes Common 5 V controlled by the power save function Current amplified at Q213 Q214 5 V controlled by the power save function Current amplified at Q211 Q212 Used by the receiver circuits 5 V current amplified at Q209 Q210 Used by the transmitter circuits PLL STLB COUNTER AND LATCH 2 VOLTAGE REGULATOR CIRCUIT MAIN UNIT When the battery voltage is 5 5 16 V the regulator 204 outputs a reference voltage of 5 V The noise components are removed by the noise filter C220 R213 This output is applied to the current amplifier Q207 Q208 3 CPU POWER SUPPLY CIRCUIT LOGIC UNIT When the power is turned off voltage from the lithium battery is applied to the CPU 501 pin 52 via D502 4 5 OTHER CIRCUITS 1 S RF METER CIRCUIT LOGIC UNIT The voltages detected at the S meter detector Q4 Q5 D7 or the APC detector D13 D14 are applied to pin 2 of IC502 1 2 When the voltage level is detected IC503 pin 52 outputs a HIGH signal Because the signal passes through an integrator circuit C507 R517 the voltage at pin 3 increases with time When the voltage at pin 3 is greater than that at pin 2 pin 1 outputs a HIGH signal to IC503 pin 51 When 503 pin 52 becomes
17. AND VOLTAGE DIAGRAM enne nne nnns 11 3 SECTION 1 SPECIFICATIONS GENERAL Frequency coverage e Mode Tuning step increment Memory channels e Antenna impedance Power supply requirement Current drain at 13 2 V DC Usable temperature range Dimensions Weight TRANSMITTER Output power at 13 2 V DC Modulation system Max frequency deviation Spurious emissions Microphone impedance RECEIVER Receiver system intermediate frequencies Sensitivity Spurious rejection Audio output power Audio output impedance OPERATIONAL RANGE MHz VERSION RECEIVE TRANSMIT 06 U S A 07 Australia 08 Southeast Asia 138 00 174 00 140 00 150 00 05 U S A 09 Southeast Asia 02 Europe 144 00 146 00 144 00 146 00 04 Italy 138 00 174 00 138 00 174 00 Specifications guaranteed for 144 00 148 00 MHz Operational range 144 00 148 00 MHz FM F3 IC 2GA IC 2GAT 5 10 15 20 or 25 kHz IC 2GE 12 5 or 25 kHz IC 2GA IC 2GAT 20 plus a CALL channel IC 2GE 20 50 Q unbalanced 5 5 V 16 0 V DC negative ground RECEIVE power saver on 10 mA typical aud output 250 mA TRANSMIT HIGH 1 8 A LOW 900 mA 10 60 C 14 F 140 F All versions 65 35 0 mm 2 6 W x 1 4 0 in IC 2GAT U S A with BP 70 151 H
18. Current D3 D4 016 D17 Control IN 4002 x 4 D6 2P1M Gate Pulse Phase Angle Control Gate Generator 1 4 IC2 Q3 2SA970 uPD4011B Q4 2SC2440 Charging Current Control 05 06 25 945 x 2 Charging Detector Q10 28C1740 CHARGE IND Logic Circuit Charging Current 011 012 Selector 1 2 144102 Se uPD4011B x 2 D2MS x 3 Current Selector data 10 2 Charging Battery Pack 2 s 10 4 CIRCUIT DESCRIPTION This charger is designed for the following battery packs 2 BP 3 BP 4 BP 5 7 and BP 70 The char ger s selector board which selects the correct charging current for the battery pack as well as the battery pack sensors prevent overcharging The phase angle control circuit a feedback loop ensures charging at a stable current 1 PHASE ANGLE CONTROL CIRCUIT An SCR D6 controls the current using the phase angle In order to synchronize the gate pulse with the supplied voltage the charger generates a saw tooth wave synchro nized with the rectified AC input A gate pulse of the desired phase angle approx 40 160 is generated by changing the fall time of the saw tooth wave Diagram 1 Threshold Diagram 3 E Threshold e Diagram 4 E Threshold 0 180 Explanation of diagrams 1 Rectified Sine Wave 3607 2 Voltage Waveform When the C
19. MCR10 JPW Versions 05 06 07 08 09 MCR10 JPW Versions 02 04 Jumper Jumper P C Board P C Board P C Board Tube Crystal Seat B 1562B Main B 1552C PTT B 1570C Junction IRRAX d 0 7 L 2 0 X201 Versions 02 04 8 2 RFUNIT DESCRIPTION PARTNO DESCRIPTION MC3357P LS 321 PLL2001 LS 321 SC 1080 LS 321 LS 321 LS 262 Transistor 25 37723 LS 354 FET 2SK302 Y LA 247 Transistor 25 37703 246 Transistor 25 37703 LALO2KR 1R5M Transistor 25 3770 3 LALO2KR 1R5M Transistor 2SC2712 Y LA 228 Transistor RN1404 LALO2KR 4R7K Transistor 2541162 GR LA 246 FET 25 209 Y LALO3NA 1R5M Transistor 25 37723 Transistor 2SB909M Q R Transistor 25 37723 Resistor 100 kQ MCR10 Transistor FMS1 Resistor 6 8 kQ MCR10 Transistor 2SC2712 BL Resistor 22 kQ MCR10 Transistor DTA144EU Resistor 33Q MCR10 Transistor RN1404 Resistor 330Q R20 Transistor 2SC2712 BL Resistor 100 kQ MCR10 Transistor 25 37723 Resistor 100 kO MCR10 Transistor DTC144EU Resistor 100 kQ MCR10 FET 25 536 Resistor 220 MCR10 FET 25 536 Resistor 4 7 kQ MCR10 Transistor 2SA1576 R Resistor 470Q MCR10 Transistor DTC144EU Resistor 22 kQ MCR10 Transistor DTA144EU Resistor 47 kQ MCR10 Resistor 1 5 MCR10 Resistor 2 2 kQ MCR10 Diode MA862 Resistor 22 kQ MCR10 Varicap MA334 B Resistor 1 5 kQ MCR10 Varicap MA334 B Resistor 1 5 MCR10 Varicap MA334 B Resistor 47 kQ MCR10 Varicap MA334 B Resistor 1 5 kQ MCR10 Diode HSM88AS Resisto
20. Power Control RF UNIT IC3 output passes through the APC detector circuit D13 D14 L15 etc where its RF output level is detected The detected output compared at the differential amplifier Q13 to the reference voltage output of the power set circuit is applied to the base of Q15 When the antenna is matched at 50 Q the detected output is at a minimum When mismatched the detected output increases The current at the collectors of Q11 and Q15 as well as the gain of the driver Q10 decreases until the detected output and the reference voltage become equal In this way the power module IC3 is protected from damage Q17 acts as a switch for the reference voltage used in the APC circuit In this way HIGH LOW transmit output power switching is accomplished This current is controlled lt by the APC circuit 7W output power to low pass filter ber DETECTOR CIRCUIT RF indicator signal to the LOGIC UNIT POWER SET CIRCUIT T 5 LOW HIGH when low power is selected 3 CHARGE PUMP AND LOOP FILTER CIRCUITS RF UNIT Phase detected signals from pins 5 and 12 are converted to DC voltage by the charge pump Q6 Q8 and the lag lead loop filter 48 50 C81 C112 and C113 The frequency at which the VCO oscillates is controlled by varactor diodes D703 D704 DC voltage PLL lock voltage is provided through the loop filter The output of the loop filter passes t
21. RHO4A3AS4J Resistor 47kQ MCR10 Tantalum 0 47 uF 25V SV Ceramic 470 pF GRM40 Ceramic 47 pF GRM40 Ceramic 39 pF GRM40 Diode MA862 Varicap MA334 B Varicap MA333 Varicap MA334 B Diode 1SS154 Connector PI28A10M P C Board B 1566B Crystal Seat 41424 Sponge BC R15K LB 224 8 5 DTMFUNIT Versions 05 09 DESCRIPTION DESCRIPTION Variable Resistor RK0971110051A 10KB SQL LR40872 Variable Resistor RK097111101NA 10KA VOL Resistor 4 7 kQ MCR10 Resistor 2 2 kQ MCR10 Transistor 2SC2712 BL Resistor 470 10 Resistor 47 kQ MCR10 Resistor 47 kQ MCR10 Diode DAP202U Resistor Array MA5025 F 09 224 J Resistor 1 MCR10 Resistor 1MQ MCR10 Discriminator CSAC3 58MGC300CD Resistor 100 kQ MCR10 Resistor 100 kQ MCR10 Resistor 47 kQ MCR10 Trimmer 10 kQ RH04A3A14J Resistor 1 2 MCR10 Resistor 33 kQ MCR10 Resistor 220Q MCR10 Resistor 22 kQ MCR10 Resistor 100 kQ MCR10 Resistor 47 kQ MCR10 Resistor 330 kQ MCR10 Resistor 68 kQ MCR10 Resistor 100 kQ MCR10 Resistor 390 kQ MCR10 Resistor 1MQ MCR10 Tantalum 0 47 pF 25V SV Resistor 220 kQ MCR10 Ceramic GRM40 SL 300J 50PT Resistor 1 10 Ceramic GRM40 SL 300J 50PT Resistor 1 10 Tantalum TES VC1A106M12L Resistor MCR10 Ceramic 470 pF GRM40 Ceramic 470 pF GRM40 Ceramic 0 1 pF GRM40 F Ceramic 0 01 pF GRM40 F Connector 28 06 0 001 uF GRM40 Ceramic 15 pF GRM40 Ceramic 15 pF GRM40 P C Board B 1567B Tanta
22. mm 5 9 H in IC 2GA IC 2GAT Southeast Asia with BP 4 140 H mm 5 5 H in IC 2GA U S A IC 2GE with BP 3 130 mm 5 1 H in IC 2GAT U S A with BP 70 500 g 1 1 Ib IC 2GA IC 2GAT Southeast Asia with BP 4 450 g 1 0 Ib IC 2GA U S A IC 2GE with BP 3 430 g 0 9 Ib HIGH 7 W LOW 1W Variable reactance frequency modulation 5 kHz Less than 60 dB 2kQ Double conversion superheterodyne 1st 16 9 MHz 2nd 455 kHz Less than 0 25 for 12 dB SINAD Less than 60 dB More than 400 mW at 10 distortion with an 8 Q load 8Q Ali stated specifications are subject to change without notice or obligation SECTION 2 OUTSIDE AND INSIDE VIEWS 2 1 FRONT AND SIDE PANELS SQUELCH CONTROL ANTENNA CONNECTOR FUNCTION SWITCH PTT SWITCH LIGHT SWITCH BATTERY PACK RELEASE BUTTON VOLUME CONTROL POWER SWITCH TRANSMIT INDICATOR DTMF KEYBOARD SPEAKER CALL SWITCH IC 2GA GAT TONE CALL SWITCH IC 2GE 17 C d RF OUTPUT POWER SWITCH MONITOR SWITCH S SS s IC 2GAT only EXTERNAL MICROPHONE AND SPEAKER JACKS MICROPHONE BATTERY PACK 2 2 TOP PANEL WRITE SWITCH MHz DIGIT UP DOWN SWITCH VFO MEMORY SWITCH 100 kHz DIGIT UP DOWN SWITCH 10 kHz DIGIT UP DOWN SWITCH 2 3 FUNCTION DISPLAY TONE AND SQUELCH DUPLEX INDICATORS INDICATORS rm LOCK INDICATOR
23. uF 470 uF 47 uF 22 uF 470 pF 470 pF 2 2 uF 0 0047 0 0047 uF SDJ2S D2MS D2MS D2MS OPC 013 OPC 019 OPC 146 OPC 071 B 439D 10 7 SCHEMATIC AND VOLTAGE DIAGRAM 221 121 NOM 90 speosz l p So 028 l 5 0221952 699151 T a 06 30S02 2ZH3 xoi gu ZOObNL 0 41052 998151 ALZ 248 40219 913 95 ASS VS V Ro rea d o od 5 089 S S Aq ee 1 O 0 0 089 ELY KS 91 ET I 1 9 ZH 09 50 S d1 ZH 09 AOZZ 0 9841 ZH 09 08 092 WOLIOS 96 41 ZH 09 09 ALLL 20 dOL 35V 110A LAdNI NOISH3A 5181057 LO 83604 td ASL 14 727 seras LS zH09 0S OL 22 2913 a d 10 7 SECTION 11 UT 40 TONE SOUELCH UNIT 11 1 UT 40 CIRCUIT DESCRIPTION 1 GENERAL is a tone encoder decoder which outputs and detects 37 tone frequencies IC2 functions as a serial parallel conver ter 6 bit parallel data are applied to IC1 Refer to the following table for tone frequencies an
24. 1 66 P72 e L H DA2 67 P73 e L H DA3 eo of 2 SEGET Turns off standby RESET When resetting becomes LOW for initialization 69 80 50 512 H H LCD driver output KS0 KS1 KS2 pin 29 pin 30 pin 31 MHz DN MHz UP 100 kHz UP 100 kHz DN pin 34 10 kHz UP 10 kHz DN CALL KR1 pin 35 KR2 pin 36 SECTION 5 MECHANICAL PARTS AND DISASSEMBLY DESCRIPTION ORDERING NUMBER ORDERING NUMBER No 0 3 PH BO 1 4 x 2 5 Ni 8810003850 Lens 8930011940 573 keyboard 05 09 8010006870 No 0 1 PH M2 x 2 5 8810004870 PH B0 2 x 31 5 ZK 8810004000 Button K 106 8610004210 Rear panel 8010006860 Button K 107 8610004220 No 0 1 PH B0 2 x 4 8810004800 No 0 1 PH M2 x 2 5 8810004870 Speaker plate 8930012100 No 0 3 PH B0 1 4 x 4 5 Ni 8810004980 Casing seal side 8930011990 Spacer plate 8930012140 6189668668686909 Microphone holder 8930011930 e e Top panel switch seal 8930011960 Casing seal center 8930011870 Top panel 05 06 07 08 09 8310011520 eoo No 0 1 PH M2 x 5 ZK 8810000530 Top pnel 02 04 8310011940 PTT button 8930011910 VR angle plate 8930012120 PTT holder 1 8930011920 LCD contact strip SRCN573 8930012090 PTT switch rubber
25. 3 2822712 Y BL RN1404 Q5 Q1 010 Q12 Q6 Q15 Q18 Q7 017 Q18 BASE DASE BASE COLLECTOR COLLECTOR COLLECTOR COLLECTOR EMITTER EMITTER EMITTER EMITTER Symbol JY3 Symbol LY3 Symbol LL Symbol XD 25B8900M CR 155193 HSMBBAS MABE 07 09 013 D1 016 014 Symbol Symbol C1 COMPONENT SIDE po ni LID n S 3 ol Je CA mpi 1 25K536 25A1162 GR FMS1 DTA144EU DTCTIAEU O21 022 Qa 313 O16 COLLECTOR Symbol GR Symbol 1 Symbol 16 155153 RD3 1M 5K302 Y DAP202U 15V172 015 018 Qz 019 Symbol A9 Symbol 9T2 BA526 IC201 SINGLE POWER AMPLIFIER LC4001BM 1C203 QUAD 2 INPUT NOR GATE M5218FP IC205 LOW NOISE DUAL OPERATIONAL PD4094BG 202 8 STAGE SHIFT STORE BUS REGISTER STROBE 116 DATA 2 hs CLOCK 3 i4 Q5 Q1 4 2113 Q6 Q2 5 12 Q7 Q3 6 111 Q8 Q4 7 2110 Qs Vss 8 9 Qs S81250HG 204 C MOS VOLTAGE REGULATOR OUTPUT INPUT TC5082P G 1C206 02 04 OT 2 3 47 5 7 8 9 XT XT NC XTOUT VDD NC 09010 08 GND 7 5 MAIN UNIT FOIL SIDE FMW1 O208 2541162 Q207 Q214 25106 GR 0206 Q202 0204 0211 0219 0220 2504081 R Symbol 27 BASE 1 nasc COLLECTOR gwirTEH ER Symbol SG EA ITT GATE Symb
26. 5 0V S ISIz t WN o 8 81 8 1 5 8 91619 eek 5 51 8 8 S x eR S BT ST E Boh g S T 2 Sj ots C56 0 01 8 8 8 axs 9 rov N RX 5 0V 60 470P 6 04 5 S 25 3770 8 016 025 DTCI44EU 44 C72 0 001 100 n Sec 4 UNLOCK 0 6V LOCK 4 2V C68 0 001 R62 390K C102 0 00 R52 47 C75 0 001 af x 8 Q6 25027 2 d TX RX OV R42 i TX 1 9V qO RX 1 7V TX 1 7V RX 1 4V R53 15K Q21 22 25 536 25 3772 C82 33P 0 001 DH VCO UNIT 4 47 0707 070 R705 0 C708 0 001 8703 39K R704 10K 28C3772 R49 8 2K 0 00 a R48 iK S 2 o s o R50 UNLOCK OV LOCK 5 0v Q23 2 254162 Q7 H N 8 EN 1494 TX RX ov 25 RX 1 4 V UN LOCI 85 59 25 209 Lock Q8 91 13 2 254162 5 R602 47K 0 47 C605 39P IC60 5716 0409486 MUR TONE ON ov TONE OFF 5 0V RX 5 0V TONE ENCODER UNIT IC 2GAT RBO2 33K 080 047 voL AM 4 DTMFO RBO3 22K 470P 3 6vo p 0 28p30c 080 2 25 27 2 KEY OFF OV 5 RX 0V n
27. BG R244 iM a N Y pov 029 y 22v TX RX OV RX 0 8V 4081 X TX RX 0V 73096 qum 2 AT HIGH TONE Low EMITTED Q206 mdi ond RR C amp TONE CALL UNIT amp 3 IC206 I TC5082P G I I T CALL SW I amp TX RX 0 5V I I 2115 TIS p e 1 IC205 1 Ajj R87 5 6 M5218FP l 9298 IC 2GE R23 1K I x 1 4 yh 41 26 x R232 180K R234 180K 2Vp p amp x Q218 1 10 IC 2GAT 4 TX 2 9V 5 5 RN2404 21 OV T CALL SW 1 38d 0 teuSec o t R235 270K amp TXRX 5 0V J 81 1714 M R R240 100K MOD R233 120 TONE CALL IC 2GE 6 6 5 m Em L 8 C68 0 00 8 JE LT 518 100 nSec UNLOCK 0 6 V LOCK 4 2V Q2 254 I I P20 TONE sje 1 R20 L5k 044 01 RI9 20K C37 27 R28 10K X 5K J 11121514 R29 H M88AS c46 15519 7 470 5 4 3 2 a ar 1 357 0 RES 8 LM 2 15 15 E RX 28 RX 0 7v o R32 470 RX 2 0V 5 81 18 Q3 TX 0Y 10 RX 1 5V 2903770 18 354 RX 0 8V 77 1 I IX 0V 4 4 RX
28. HIGH the S RF level calculated from the delay time is displayed A DO IC503 PIN51 _ IC503 PIN52 S RF signal C507 C511 2 LAMP CIRCUIT LOGIC UNIT When the LIGHT SWITCH is pushed the IC503 pin 53 LAMP signal becomes HIGH The current of this signal is amplified at Q501 to light the two chip type LED DS502 DS503 3 LOW VOLTAGE DETECTOR CIRCUIT LOGIC UNIT 5S is divided over R523 and R524 1 16 V are applied to IC502B pin 5 The Vcc voltage divided over R525 and R526 is applied to pin 6 When the Vcc voltage exceeds 5 7 V the voltage at pin 6 becomes greater than that at pin 5 Output pin 1 becomes LOW When the Vcc voltage is less than 5 7 V the voltage at pin 5 exceeds that at pin 6 Pin 1 outputs HIGH The TRANSMIT INDICATOR does not light even when transmitting 4 BEEP CIRCUIT MAIN UNIT When some switches are pushed the CPU sends BEEP data to IC102 Beep tones are output from 1 202 pin 5 in square waves of about 1 kHz and 500 Hz 5 POWER SAVER CIRCUIT MAIN UNIT When the squelch is closed IC503 pin 41 BUSY signal is LOW If no operation is performed for more than 30 seconds the power save function is automatically acti vated After 30 seconds the 503 sends power save data to 12202 SQL LOW BEEP OFF POWER 1 1C202 2 SHIFT 3 REGISTER TMUT STANDBY STANDBY SHUT SHUT SHUT DOWN DOWN DOWN 500
29. ID 10 5 10 6 PARTS LIST uPD4011B uPD4011B 2SC1815 0 Y GR BL 2SA1015 Y 2SA970 GR BL 2SC2240 GR BL 2SC945 P 2SC945 P 2SC1740 Q R S E 2SC1740 QR S E 25 1740 R S E Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Zener RD9 1EB1 Diode 181555 Diode 1 4002 Diode 1N4002 Diode 151555 SCR 2P4M Diode 1N4002 Diode 1S1555 Diode 1S1555 LED LD 002R Diode 1S1555 Diode 1S1555 Diode 1N4002 Diode 1N4002 Choke Choke Choke Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Surge Absorber Electrolytic Electrolytic Ceramic Electrolytic Ceramic Ceramic Ceramic Ceramic Barrier Layer Ceramic Ceramic Ceramic Ceramic Ceramic Electrolytic Electrolytic Ceramic Ceramic Electrolytic Ceramic Ceramic Switch Switch Switch Switch Jumper Jumper Power Cord 02 03 04 05 P C Board 10 6 5 6 kQ 470 kQ 22 kQ 6800 6800 10 kQ 10 kQ 270 150 10 10 10 10 2 390 47 uF 10 uF 470 pF 100 pF 0 0047 0 0047 0 0047 470 pF 0 047 uF 470 uF 470 uF 470 uF 470
30. Li 25C4081 0501 Q502 COLLEGTOA EMITTER Symbol BR 548 0507 Symbol M1A SLM 13MW 05502 05503 1 7 185184 155186 0502 0504 02 04 0505 404 07 T gt iN Symbol B3 Symbol G3 SLM 13VW DS504 7 3 LOGIC B UNIT COMPONENT SIDE LI E xe gt _ gt gu ta 28 23 5858866215255233 uo rs lt o a z 310 ef o3 25 S BO54ALB IC501 LA6393M 10502 RESET DUAL COMPARATOR VOLUME CONTROL AND POWER SWITCH FOIL SIDE KEFEN GEG Zt 355 25A1362 GR RN1404 185193 0503 0504 0501 0504 05 06 08 09 COLLECTOR Symbol AEG Symbol YD Symbol F3 GND TO SOL UNIT SL SOUELCH CONTROL MC3357P IC1 LOW POWER FM IF CRYSTAL 1 D OSCILLATOR 2 115 GND MIXER OUTPUT 14 AUDIO MUTE 40 113 SCAN CONTROL 312 SQUELCH INPUT 111 FILTER OUTPUT 310 FILTER INPUT 9 DEMODULATOR OUTPUT 116 RF INPUT LIMITER INPUT 50 DECOUPLING 60 LIMITER OUTPUT 70 QUAD INPUT 80 SC 1080 IC3 POWER MODULE OUTPUT SUPPLY VOLTAGE BIAS POWER CONTROL INPUT PLL2001 2 PLL SYNTHESIZER OV RANGE FR DOA LE DATA CLK 7 4 RFUNIT FOIL SIDE 25C3770 3 28C3772
31. MCR10 Electrolytic 50V 55 Resistor 1kQ MCR10 Ceramic GRM40 Resistor 4 7 MCR10 Electrolytic 50V RC3 Resistor 4 kQ MCR10 Electrolytic 10V RC3 Resistor 2 2 kQ MCR10 Ceramic GRM40 Resistor 10 kQ MCR10 Electrolytic 63 57 Resistor 100 kQ MCR10 Ceramic GRM40 F Resistor 10 kQ MCR10 Ceramic GRM40 Resistor 270 MCR10 Ceramic GRM40 F DESCRIPTION Ceramic Electrolytic Ceramic Ceramic Electrolytic Electrolytic Electrolytic Electrolytic Ceramic Electrolytic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Electrolytic Ceramic Ceramic Ceramic Electrolytic Tantalum Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Electrolytic Ceramic Ceramic Ceramic Ceramic Electrolytic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic 0 001 uF GRM40 33 pF 16V RC3 470 pF GRM40 470 pF GRM40 100 uF 63V 55 47 uF 63V MS5 47 uF 63V MS5 47 uF 16V MS5 470 pF GRM40 22 pF 16V 55 470 pF GRM40 0 1 GRM40 F 470 pF GRM40 470 pF GRM40 470 pF GRM40 470 pF GRM40 470 pF GRM40 470 pF GRM40 1 uF 50V 55 0 001 GRM40 103K 0 01 uF GRM40 B 25PT 0 0047 uF GRM40 4 7 uF 16V MS5 0 22 uF 35 V DN Versions 02 04 07 08 09 35 V DN Versions 05 06 GRM40 470 pF GRM40 120 pF GRM40 222K 0 0022 uF GRM40 B 50PT 0 001 pF GRM40 222K 0 0022 uF GRM40
32. RM40 F Ceramic 0 1 pF GRM40 F Ceramic 82 pF GRM40 Ceramic 15 pF GRM40 Ceramic 470 pF GRM40 Ceramic 0 1 uF GRM40 F Ceramic 0 001 uF GRM40 Ceramic 470 pF GRM40 Ceramic 100 pF GRM40 Electrolytic 0 22 pF 50V MS7 Ceramic 0 001 uF GRM40 Ceramic 0 001 uF GRM40 Ceramic 33 pF GRM40 Ceramic 0 001 uF GRM40 Ceramic 0 001 uF GRM40 Ceramic 0 001 uF GRM40 Electrolytic 0 1 pF 50V MS7 Ceramic 0 01 pF GRM40 F Ceramic 103K 0 01 uF GRM40 B 25PT Ceramic 0 001 uF GRM40 Ceramic 0 1 GRM40 F Ceramic 470 pF GRM40 Ceramic 470 pF GRM40 Ceramic 0 001 uF GRM40 Ceramic 0 001 uF GRM40 Ceramic 0 001 uF GRM40 Ceramic 0 001 uF GRM40 Ceramic 0 001 uF GRM40 Ceramic 0 001 uF GRM40 Ceramic 0 001 uF GRM40 Ceramic 0 001 uF GRM40 Ceramic 0 001 uF GRM40 Ceramic 0 001 uF GRM40 Ceramic 0 001 pF GRM40 Ceramic 0 001 pF GRM40 Ceramic 0 001 uF GRM40 Electrolytic 1 pF 50 V MS7 Ceramic 18 pF GRM40 CH Trimmer ECR GA020E30 20P Ceramic 27 pF GRM40 Electrolytic 10 uF 16 V MS7 Tantalum 3 3 16V DN Ceramic 33 pF GRM40 Ceramic 0 001 pF GRM40 Ceramic 33 pF 40 12 pF GRM40 Ceramic 0 001 uF GRM40 Ceramic 0 001 pF GRM40 Ceramic 0 001 GRM40 Ceramic 0 001 GRM40 Ceramic 0 001 pF GRM40 Electrolytic 10 uF 16V MS7 Electrolytic 10 uF 16V MS7 DESCRIPTION PART NO 1R5M LOH3N 1R5M LOH3N 1R5M LON2A R15K Ceramic 22 pF GRM40 Ceramic 22 pF GRM40 Ceramic 0 001 pF GRM40 Ceramic 0 001 pF GRM40 Ceramic 0 001 uF GRM40 Ceramic 0 001
33. SECTION SECTION SECTION SECTION SECTION SECTION SECTION SECTION SECTION SECTION SECTION TABLE OF CONTENTS 1 SPECIFICATIONS 1 1 2 OUTSIDE AND INSIDE VIEWS 2 1 FRONT AND SIDE PANELS I 2 1 2 2 TOR PANEL M 2 2 2 3 FUNCTION DISPLAY 2 2 2 4 UNIT M 2 3 2 5 RE UNIT L 2 4 2 6 SPEAKER AND UNITS 2 4 BLOCK DIAGRAM Pe 3 1 4 CIRCUIT DESCRIPTION 4 1 RECEIVER CIRCUITS 4 1 4 2 TRANSMITTER CIRCUITS 4 2 4 3 PEE 4 2 4 4 POWER SUPPLY CIRCUITS u 4 3 4 5 OTHER CIRCUITS 4 4 4 6 CPU 1 501 PORT ALLOCATION resin nennen enne 4 5 4 7 MATRICES ierit tek erstes tator e neve eas Mr 4 6 5 MECHANICAL PARTS AND DISASSEMBLY 2 22 2 4 1 5 1 6 ADJUSTMENT PROCEDURES 6 1 PLL ADJUSTMENT A 6 1 6 2 RECEIVER ADJUSTMENT 4 6 2 6 3 TRANSMITTER ADJUSTMENT 02
34. T RF UNIT The signals are applied to the gate of the first mixer Q2 A frequency oscillated in the PLL passes through the LO switching circuit D16 and is applied to the source of Q2 The received signals are mixed with the PLL output to produce the first IF of 16 9 MHz which is picked up at L9 4 1st IF AMPLIFIER RF UNIT The first IF signal is applied to a set of two monolithic filters which determine the bandwidth 15 kHz 3 dB suppress unwanted heterodyned signals The first IF signal is amplified at Q3 and then applied to IC1 pin 16 via C34 5 2nd IF AND DEMODULATOR CIRCUITS RF UNIT IC1 contains the second local oscillator the second mixer a limiter amplifier and the quadrature detector Using X1 IC1 oscillates a 2nd LO frequency of 16 445 MHz The second IF of 455 kHz is output from pin 3 Applied to IC1 pin 5 the second IF is amplified at the IC s internal limiter amplifier The amplified signal is applied to the quadrature detector IC1 pins 7 8 X2 An AF signal is output from the quadrature detector through pin 9 After passing through the ceramic filter F12 a portion of the second IF is applied to the S meter amplifier O4 Q5 6 AF CIRCUIT MAIN UNIT The AF signal is applied to the de emphasis circuit C55 R33 and then to the AF amplifier Q219 Q220 The de emphasis circuit is an integrated circuit with frequency characteristics of 6 dB octave 300 Hz 3 kHz Pa
35. d corresponding input data OUTPUT SEICTINPUT PIN NUMBER OUTPUT ICT INPUT PIN NUMBER FREQUE ei iN FREQUENCY ma js a sle 7 8 5 T 67 0 HILIHIHIHI L 136 5 HIHIH H L AE 71 9 IH H L 141 3 F ht 1 744 HIHILIH H L 146 2 HILIHIHIL zh T T gt 77 0 151 4 4 dee 797 156 7 THY LI i 1 LIHIHIL LiHiL E ri H H Se H H H IH pe 114 8 31 54 41 118 8 ra 123 0 1 127 3 11 1 2 ENCODER pin 26 outputs the programmed tone frequency when IC1 pin 12 becomes LOW Q4 functions as a buffer amplifier The collector of 04 outputs the tone signal which is applied to the VCO circuit to be modulated Tone deviation is adjusted with R10 3 DECODER The detected tone from the transceiver is applied to IC1 pin 29 When the signal is tone modulated and the tone equals the programmed tone frequency pin 23 becomes HIGH When the tone squelch function is turned off IC2 pins 11 and 12 are HIGH 5 V are not applied to IC1 Q2 and Q3 are turned off and the TSQL line is HIGH When t
36. e current When the charging current is less than the specified level the circuit functions in reverse keeping the charging current constant 2 OVERCHARGE PROTECTOR Using microswitches S3 S5 and a charging detector 010 the overcharge protector circuit prevents overcharg ing When charging BP 2 BP 5 BP 7 or BP 8 the micro Switches on the base of the battery pack closes 5 Thermo sensors are included in all quick charge battery packs After the pack is fully charged the temperature inside the pack rises The charger shuts off current flow to the pack and stops charging D10 and Q10 are used to detect charging current During normal speed charging 25 mA 45 mA and 70 mA are consecutively applied to the battery cells During quick charging 600 mA is reapplied to the cells until the thermo sensor begins to function The negative charging terminal inside the battery pack is unconnected Q10 is turned off and 1 2 pin 5 becomes LOW The RS flip flop works in reverse IC2 pin 10 becomes HIGH Q4 remains off Even if the temperature cools D6 shuts off the current preventing further charging The CHG INDICATOR goes out indicating that the pack is fully charged Removing the battery pack at this time opens 55 pin 5 becomes LOW resetting the RS flip flop D1 and Q1 supply 9 V of stable voltage to the overcharge protector circuit 10 5 MECHANICAL PARTS AND DISASSEMBLY
37. ha EXT SP JACK with an 80 load FLINCTIOM DISPLAY Minimum distartion 26 LEVEL INDICATOR ADJUSTMENT 42 pin 7 S RF LEVEL INDICATOR ADJUSTMENT SENSITIVITY 110 ADJUSTMENT 6 3 TRANSMITTER ADJUSTMENT 1 AC POWER SUPPLY e Output voltage Current capacity 8 13 2 V DC selectable 3 A or more RF POWER METER TERMINATED TYPE Measuring range 1 10 W AF e Frequency range 120 180 MHz GENERATOR e impedance 50 Q e SWR Less than 1 2 1 FM DEVIATION METER AC MILLI VOLTMETER ATTENUATOR 3 AF GENERATOR AG Frequency range Output level 200 2000 Hz 0 200 mV to EXT MIC JACK 4 AC MILLI VOLTMETER e Measuring range 2 200 mV 5 FM DEVIATION METER e Minimum frequency Measuring range 6 ATTENUATOR e Attenuation ratio ADJUSTMENT 180 MHz 10 kHz 30 or 40 dB ADJUSTMENT CONDITIONS AC POWER SUPPLY to BATTERY TERMINAL RF POWER METER to ANTENNA CONNECTOR TRANSCEIVER To separate the RF UNIT from the MAIN UNIT see the diagram on p 6 1 fold out MEASUREMENT LOCATION OUTPUT POWER e Frequency 145 00 MHz Output power HIGH e Transmit Output power LOW Power supply output voltage 9 V DC Output power HIGH j __ ___ Power supply output voltage 8 4 V DC e Output power HIGH FM DEVIATION e Frequency 145 00 MHz FM deviation me
38. he tone squelch function is turned on 2 11 is HIGH and 12 12 is LOW Q2 are turned on When the received tone frequency equals the programmed tone frequency pin 23 is HIGH and the TSQL line is HIGH When the received tone frequency does not equal the programmed tone frequency IC1 pin 23 is LOW and the TSQL line is LOW 11 2 BOARD LAYOUT SIDE A H SIDE B uu C nts JB 11 2 224 n x 11 3 SCHEMATIC AND VOLTAGE DIAGRAM 1 2 uPD4094 BG 107 6520 C6 470P RX OV UNPROGRAMMED TONE ib RX 4 8V PROGRAMMED TONE 7 4581 TX OV x 4 gt c RX OV CUNPROGRAMMED TONE RX 5 0V PROGRAMMED TONE TXi5 0V 11 3 GND CK crc DATA OPT ICOM AMERICA INC Corporate Headquarters 2380 116th Avenue N E Bellevue WA 98004 U S A Phone 206 454 8155 Fax 206 454 1509 Telex 152210 ICOM BVUE Customer Service Phone 206 454 7619 lt Regiona Customer Service Centers 3150 Premier Drive Suite 126 Irving TX 75063 U S A Phone 214 550 7525 Fax 214 550 7423 1777 Phoenix Parkway Suite 201 Atlanta GA 30349 U S A Phone 404 991 6166 Fax 404 991 6327 Icom Inc 6 9 16 Kamihigashi Hirano ku Osaka 547 Japan Phone 06 793 5301 Fax 06 793 0013 Telex 05277822 ICOMTR J ICOM CANADA A Division of co
39. hrough Q9 and is used to control the bandpass filter D3 D5 D6 in the receiver RF circuit When the power save function is on the charge pump control circuit 020 022 018 cuts off the charge pump and the VCO 4 VCO CIRCUIT RF UNIT D701 changes the inductive reactance of the oscillator Q702 shifting the receive and transmit frequencies Varactor diode D702 provides frequency control Q703 buffer amplifies the VCO output signal Q701 buffer ampli fies the PLL feedback signal 5 UNLOCK SENSOR CIRCUIT When the PLL circuit is unlocked pin 7 of IC2 is LOW and a LOW signal is applied to the unlock sensor Q23 The unlock sensor outputs a current amplified LOW signal to the CPU 503 60 r M VCO UNIT 0703 from Buffer gt gt T R switching circuit RF bandpass filter 4 disp Buffer CHARGE PUMP gt CONTROL Q21 Q22 LC 4 F RANGE 14 8 COUNTER AND LATCH ZN CHARGE PUMP Q6 Q8 12 L PHASE DETECTOR 5 DATA CK SHIFT REGISTER 4 4 POWER SUPPLY CIRCUITS 1 VOLTAGE LINES Battery pack output that passes through the power switch Vcc is applied to the power module 3 the AF power amp regulator and the following 5 V lines Common 5 V current amplified at Q207 Q208
40. istor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Thermistor Resistor Resistor Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic REF NO DESCRIPTION PART NO 15kQ MCR10 10 kQ MCR10 5 6 kQ MCR10 10Q MCR10 100 kQ MCR10 330Q MCR10 330Q MCR10 150Q MCR10 330Q MCR10 390 kQ MCR10 56 kQ MCR10 100Q MCR10 10 kQ MCR10 6 8 kQ MCR10 5 6 kQ MCR10 82 kQ MCR10 20 kQ E VM LGG A00 B24 2 7 kQ MCR10 1 2 kQ MCR10 3 kQ E VM LGG A00 B33 22 kQ MCR10 220 kQ MCR10 22 kQ MCR10 560 kQ MCR10 2 2 kQ MCR10 22 kQ MCR10 2 2 kQ MCR10 47 kQ MCR10 10 kQ MCR10 100Q MCR10 1 8 kQ MCR10 1 8 kQ MCR10 150Q MCR10 1MQ R20 100kQ MCR10 22 kQ MCR10 ERT D2FHL503S 1 kQ MCR10 560Q MCR10 3pF 12 pF 0 001 uF 22 pF 39 pF 15 pF 27 pF 10 pF 22 pF 22 pF 470 pF 68 pF 470 pF 68 pF 0 5 pF 68 pF 1 pF 68 pF 47 pF 0 001 uF 0 001 uF GRM40 GRM40 GRM40 GRM40 GRM40 GRM40 GRM40 GRM40 GRM40 GRM40 GRM40 GRM40 GRM40 GRM40 GRM40 GRM40 GRM40 GRM40 GRM40 GRM40 GRM40 DESCRIPTION PART NO Ceramic 0 001 GRM40 Ceramic 4 pF GRM40 Ceramic 0 001 GRM40 Ceramic 0 1 uF GRM40 F Ceramic 0 001 uF GRM40 Ceramic 0 1 pF GRM40 F Ceramic 0 001 uF GRM40 Ceramic 27 pF GRM40 Ceramic 56 pF GRM40 Ceramic 0 1 pF G
41. le completely assembled i e with parts 69 69 and built in 8930008601 Precision type screw No 0 1 e CASE AND FRONT PANEL e TOP PANEL MAIN UNIT e LOGIC A AND LOGIC B UNITS e CONTACT HOLDER e RF UNIT SEPARATING THE RF UNIT FROM THE MAIN UNIT T JR ANZ ZB 0 tension cable kit 573 10 x ul 2 7 c xtension cable kit 573 10 A horized Icom Dealer ble kits from an aut Order the extension ca SECTION 6 ADJUSTMENT PROCEDURES 6 1 PLL ADJUSTMENT MANMENTCONETONINTN O 1 AC POWER SUPPLY Dc VOLTMETER Output voltage 13 2 V DC Current capacity POWER SUPFLY FREQUENCY COUNTER 2 FREQUENCY COUNTER Frequency range 0 1 180 MHz Fraquency accuracy 41 ppm or better Sensitivity 100 mV or bettar Lose couple to dummy load 2 DC VOLTMETER Input impadance or better to BATTERY TERMINAL separate the RF UNIT from tha MAIN UNIT sae the diagram on p 6 1 fold out REFERENCE Connect 50 C dummy load Loose couple tha frequency FREQUENCY Frequency 148 00 MHz counter to the dummy load Tranamit RF AND VCO UNITS Lroz under aluminum tapa LOCK VOLTAGE ADJUSTMENT g LP
42. lum 47 uF 6 3VSV Ceramic 330 pF GRM40 CH Ceramic 0 001 GRM40 Ceramic 0 1 pF GRM40 F 8 6 LOGIC UNIT Ceramic 0 001 uF GRM40 Ceramic 470 pF GRM40 DESCRIPTION PART NO S 8054ALB LM LA6393M uPD75308GF 034 3B9 LD B9213J SLM 13MW SLM 13MW SLM 13 VW Transistor 2SC4081 R Transistor 2SC4081 R Transistor 2SA1362 GR Transistor RN1404 Transistor 2SA1576 R Lithium Battery BR2325 1HC P C Board B 1564C LOGIC A P C Board B 1565B LOGIC B P C Board B 1555A SQL P C Board B 1556B VOL Flexible P C B 1568A M L Board Flexible P C B 1569A A B Board LCD Contact Strip SRCN573 Tube IRRAX d 0 7 L 7 0 Version 04 Diode 1SS193 Diode 1SS184 Diode 1SS196 Versions 02 04 Diode 1SS193 Versions 05 06 08 09 Diode 1SS196 Versions 04 07 Diode 1SS196 Versions 02 07 Diode MA159 Diode 1SS254 Version 04 Crystal CR 227 SECTION 9 SCHEMATIC AND VOLTAGE DIAGRAM LOGIC UNIT 21 050 05502 05503 pe 25 408 SLM i3MW SLM I3MW vcc L L RIOS T REER 12 13 14 5 16 17 18 19 20 2 22 23 24 25 26 27 28 29 30 2 x 815 un gt 918 ns0 com 2 05501 3 rt 513 E 9248 1 EU 2 9522 SLM i vw 8 L3 3 5 6 T B 9 0 44 2740 18502 25 4081 IRSE 6502 0 0 K gt 7 5 99 588 SEER R515 100K
43. m America Inc 3071 5 Road Unit 9 Richmond B C V6X 214 Canada Phone 604 273 7400 Fax 604 273 1900 ICOM EUROPE GMBH Communication Equipment Himmelgeister Str 100 4000 D sseldorf 1 W Germany Phone 0211 346047 Fax 0211 333639 Telex 8588082 ICOM D ICOM AUSTRALIA PTY LTD incorporated In Victoria 7 Duke Street Windsor Victoria 3181 Australia Phone 03 529 7582 03 529 8765 Fax 03 529 8485 Telex AA 35521 ICOM AS ICOM UK LTD Unit 9 Sea St Herne Bay Kent U K Phone 0227 363859 Fax 0227 360155 Telex 965179 ICOM G ICOM FRANCE S A 120 Route de Revel BP4063 31029 Toulouse Cedex France Phone 61 20 31 49 Fax 61 34 05 91 Telex 521515 ICOM FRA Count on us 5019 5 Printed in Japan Copyright 1988 by Icom Inc Icom Inc 6 9 16 Kamihigashi Hirano ku Osaka 547 Japan
44. ol SOLE COLLECTOR EMITTER COMPONENT SIDE 2502712 BL 0208 2213 COLLECTOR EMITTER Symbol LL DAP202U 0204 D205 0209 2SA1576 0212 2216 0217 COLLECTOR EMITTER Symbol FR DTC144EU 0215 BASE COLLECTOR EMITTER Symbol 24 x x 8 a 5 25B808M DANZO2U 0205 2210 0201 0202 0205 0207 Cu Wm 4 Symbol M 2404 155184 0218 2402 04 0208 402 04 BASE COLLECTOR EMITTER Symbol YD HOW Dui H THY 571164 12601 GENERATOR C MOS LSI 4094 6 1C602 8 STAGE SHIFT STORE BUS REGISTER STROBE 10 716 OUT 20 CE1 CLOCK 7 14 05 2 40 113 06 Q2 50 12 07 60 111 08 Q4 701 110 Qs Vss 9 Qs LR40872 801 TONE DIALING Ve 4 18 NONCONNECT TONE V 2 U XMAT ee 16 SINGLE TONE INHIBIT COL 4 15 ROW coL ROW 2 5 COL ROW 22 ig gt RO V 7 12 ROW asc MUTE 9 out OSC COL 4 7 6 OTHER UNITS e VCO UNIT LUN au e PTT UNIT TU WHIT JUNCTION UNIT TONE UNIT Versions 05 09 e DTMF UNIT Versions 05 09 7 9 SECTION 8 PARTS LIST 8 1 MAINUNIT DESCRIPTION DESCRIPTION BA526 Resistor MCR10 yPD4094BG Resi
45. r 33 kQ MCR10 Diode 1SS193 Resistor 560 kQ MCR10 Diode HSM88AS Trimmer 20 kQ E VM LGG A00 B24 Diode HSM88AS Resistor 680 kQ MCR10 Diode HSM88AS Resistor 10 kQ MCR10 Diode 1SS153 Resistor 330 kQ MCR10 Diode MA862 Resistor 100 kQ MCR10 Zener RD9 1M B2 Resistor 330 kQ MCR10 Diode 15 V172 Resistor 4700 MCR10 Diode DAP202U Resistor 2 7 kQ MCR10 Diode 1SS254 Resistor 27 kQ MCR10 Resistor 5 6 kQ MCR10 Resistor 2 2 kQ MCR10 Monolithic 16M15B4 Resistor 100 kQ MCR10 Ceramic CFUM455E Resistor 1 MCR10 Resistor 47 kQ MCR10 Resistor 10 kQ MCR10 Crystal CR 177 16 445 MHz Resistor 270 kQ MCR10 Discriminator CDB455C7A Resistor 100 kQ MCR10 Crystal CR 248 10 0 MHz Resistor 100 kQ MCR10 Resistor 470 kQ MCR10 Resistor 1kQ MCR10 Coil LA 235 Resistor 8 2 kQ MCR10 Coil LA 234 Resistor 390Q MCR10 Coil LA 227 Resistor 470Q MCR10 Coil LA 226 Resistor 47 MCR10 R53 R54 R55 R56 R57 R58 R59 R60 R61 R62 R63 R64 R65 R66 R67 R68 R69 R70 R71 R72 R73 R74 R75 R76 R77 R78 R79 R80 R82 R83 R84 R85 R86 R87 R88 R89 R90 R91 C2 C3 C4 C5 C6 C7 C8 C11 C12 C13 C14 C15 C17 C18 C22 C23 C25 C26 C27 Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Resistor Trimmer Resistor Resistor Trimmer Resistor Resistor Resistor Resistor Resistor Res
46. se Serial data output clock a PLLN b CTCSS TONE c EXPANSION Serial data output synchronized with CK BUSY input used when a signal is received Input used for lamp output HI LOW control input used for ON OFF control of SOL OFF and BEEP output TX Rx switching input Switches matrix input to FUNC functions Output for the initial matrix 47 P21 L e VOSTB Strobe signal output for I O expansion serial data 48 P22 O L PLSTB PLL serial data strobe signal output 49 P23 L e CTSTB CTCSS serial data strobe signal output 50 P30 I L H DET Data equalizer signal input from the CTCSS decoder 51 P31 1 L H SRFI S RF meter comparison input 52 P32 L H SRFO S RF meter comparison output 53 P33 L H LAMPO LCD backlight LAMP output 54 2 5V VDD 55 59 XTAL T 60 P60 UNLK PLL unlock input 61 P61 L L HULOW Used for output and KEYLOCK ON OFF switching Determines whether or not a CTCSS encoder decoder 92 Pee 9 E j L ENC DEC MN6520 is online Determines whether or not a CTCSS encoder 63 P63 9 L L ENC S7116A is online 64 P70 O L e H DAO 1 65 P71 L H DA
47. signal is output to pin 11 Q801 is turned on for about one second to maintain transmission without pushing the PTT switch 9 T5 R5 SWITCHING CIRCUIT MAIN UNIT When the PTT switch S205 is pushed Q216 is turned on The collector of Q215 outputs a LOW signal to the CPU IC503 pin 44 Using the LOW signal the CPU sends TRANSMIT data to IC202 1C202 pin 13 outputs a HIGH signal to 203 8 and IC203A pins 12 and 13 controlling IC203C pin 10 shutting off R 5 IC203A pin 11 outputs a LOW signal to 203 2 controlling the base of 0209 turning on T4 5 T5 R5 SWITCHING CIRCUIT Releasing the PTT switch turns off Q216 The collector of Q215 outputs a HIGH signal which causes the CPU to send RECEIVE data to 1 202 1C202 pin 13 outputs LOW signal to 203 8 and IC203A pins 12 and 13 controlling IC203C pin 10 turning on R 5S 1C203A pin 11 outputs a HIGH signal to IC203B pin 2 controlling the base of Q209 turning off T 5 55 0213 0214 0211 0212 LOW POWER CHARGE PUMP DESCRIPTION Output for the SW matrix Output for the SW matrix Output for the SW matrix Output for the SW matrix Ground Input for the matrix return input for the matrix return Input for the matrix return Input for the matrix return Standby detector input Goes to standby at the end of a pul
48. ssing through the volume control R502 the signals are ampli fied by 201 and sent to the speaker 7 SQUELCH CIRCUIT RF AND MAIN UNITS A portion of the AF signal from IC1 pin 9 is applied to pin 10 the active filter The SOL pot R501 adjusts the input level at pin 1 The active filter in amplifies noise components of frequencies of 20kHz and above and outputs the resulting signals from pin 11 The signals pass through D9 for noise detection If the detected noise voltage is high Q18 is turned on Q202 is turned off cutting off voltage buffer Q204 Q205 output voltage In this way 201 is deactivated when the squelch is closed When transmitting a decrease 0202 voltage cuts off voltage buffer output voltage turning off IC201 8 LOCAL OSCILLATOR CIRCUIT RF UNIT 012 buffer amplifies the VCO output which then passes through D16 and is applied to the source of Q2 IF CIRCUIT AF output to Q219 DEEMPHASIS SQL control 5 1st IF signal from Q3 SQL CO Squelch close LOW Squelch Open HIGH 4 2 TRANSMITTER CIRCUITS 1 MICROPHONE AMPLIFIER MAIN UNIT AF signals from the built in condenser microphone or from the external microphone jack are amplified at a limiter amplifier IC205 and are pre emphasized to 6 dB octave 300 Hz 3 kHz Pin 1 outputs a square wave which con tains many high harmonic components The signals pass through the splatter fil
49. stor MCR10 LCA001BM Resistor MCR10 S81250HG Resistor MCR10 5218 Resistor MCR10 TC5082P G Resistor MCR10 Versions 02 04 Resistor MCR10 Resistor MCR10 Resistor MCR10 Transistor 25 4081 Resistor MCR10 Transistor 25 4081 Resistor MCR10 Transistor 258909 Q R Resistor MCR10 FET 25 106 GR Versions 02 04 07 Transistor 2SA1162 GR 08 09 Transistor FMW1 MCR10 Transistor 25 2712 BL Versions 05 06 Transistor 2SB909M Q R Resistor MCR10 Transistor 25 4081 R Resistor MCR10 Transistor 2SA1576 R Resistor MCR10 Transistor 2SC2712 BL Resistor MCR10 Transistor 2SA1162 GR Resistor MCR10 Transistor DTC144EU Resistor MCR10 Transistor 2SA1576 R Resistor MCR10 Transistor 2SA1576 R Trimmer RH04A3ASAJ Transistor RN2404 Versions 02 04 Trimmer RH04A3A14J Transistor 25 4081 Versions 02 04 Transistor 25 4081 R Resistor MCR10 Versions 02 04 Resistor MCR10 Diode DAN202U Resistor MCR10 Diode DAN202U Resistor MCR10 Diode DAP202U Resistor MCR10 Diode DAN202U Resistor MCR10 Diode DAP202U Resistor MCR10 Diode DAN202U Resistor MCR10 Diode 155184 Versions 02 04 Resistor MCR10 Diode DAP202U Resistor MCR10 Zener RD20E B2 Resistor MCR10 Resistor MCR10 Resistor MCR10 Crystal RF4A3 FAE Resistor 10 Versions 02 04 Electrolytic 50V Resistor 47 kQ MCR10 Ceramic GRM40 Resistor 4 7 kQ MCR10 Ceramic GRM40 Resistor 22 kQ MCR10 Electrolytic 10V RC3 Resistor 680Q MCR10 Electrolytic 10V RC3 Resistor
50. ter HPF 50 kHz LPF 20 kHz Deemphasis OFF Detector 2 Apply an AF signal to the EXT MIC JACK 1 kHz 40 mV USA version 1 kHz 100 mV Connect the RF power meter to the ANTENNA CONNECTOR Connect the FM deviation meter to the ANTENNA CONNECTOR via the attenuator More than 25W More than 2 0 W 4 8 kHz CTCSS DEVIATION IC 2GAT only e Frequency 145 00 MHz Set the tone frequency to 88 5 MHz e HPF FF LPF 20 kHz De emphasis OFF Detector P P 2 e Cut off microphone input Transmit Connect the FM deviation meter to the ANTENNA CONNECTOR via the attenuator X 0 75 kHz DTMF DEVIATION IC 2GAT only e Frequency 145 00 MHz e While pushing the PTT switch push and hold D on the keypad Connect the FM deviation meter to the ANTENNA CONNECTOR via the attenuator TONE CALL DEVIATION IC 2GE only e Frequency 145 00 MHz e Push and hold T CALL Connect the FM deviation meter to the ANTENNA CONNECTOR via the attenuator x 3 5 kHz MAIN AND TONE UNITS IC 2GA IC 2GAT EXT MIC JACK TONE UNIT IC 2GAT only FM DEVIATION ADJUSTMENT Nuts IHOT p CTCSS DEVIATION ADJUSTMENT R501 IC 2GE R242 TOME CALL ee eee mne cx PEYET E Rd DEVIATION ADJUSTMENT RF UNIT 5 815858 E 220
51. ter in IC205 where signals of 3 kHz and above are attenuated The signals from pin 7 are applied to the VCO UNIT for frequency modulation FM 2 DRIVE AMPLIFIER RF UNIT The VCO output is buffer amplified at 012 Passing through D16 the signals are then amplified at the drive amplifier Q10 3 RF POWER AMPLIFIER RF UNIT 010 output is amplified at IC3 to 7 W HIGH or 1 W LOW When transmitting the RF signals amplified at IC3 pass through the antenna switching diode D15 and the low pass filter where harmonic signals are rejected The signal is then applied to the antenna connector RX 1st mixer APC CIRCUIT RF signal from Q12 Power mod Driver amp Q15 Detected voltage Reference voltage 4 3 PLL CIRCUITS 1 GENERAL The PLL circuit using a one chip PLL IC IC2 directly generates the desired frequency 2 sets the dividing ratio based on serial data from the CPU IC501 and compares the phases of the VCO signal and the reference oscillator frequency it detects the out of step phase and outputs it 2 REFERENCE OSCILLATOR CIRCUIT RF UNIT oscillates 10 MHz signal 2 divides this signal with N data from the CPU In this way one of six tuning steps b 10 12 5 15 20 25 kHz can be selected jt ule pe von D D D D D D D D D 1 L 4 APC CIRCUIT Automatic
52. uF GRM40 Ceramic 0 001 pF GRM40 Electrolytic 0 47 uF 50V MS7 Ceramic 0 001 uF GRM40 Ceramic 0 001 uF GRM40 Ceramic 10 pF GRM40 Ceramic 0 001 GRM40 Ceramic 0 001pF GRM40 Electrolytic 4 7 uF 35 V MS7 Ceramic 0 001 pF GRM40 Ceramic 0 1 uF GRM40 F Ceramic 0 001 uF GRM40 Ceramic 0 001 GRM40 Ceramic 0 001 uF GRM40 Ceramic 7 pF GRM40 Ceramic 0 001 uF GRM40 Ceramic 0 001 pF GRM40 Ceramic 0 001 pF GRM40 Ceramic 0 001 pF GRM40 Resistor 1 kQ MCR10 Resistor 100 kQ MCR10 Resistor 39 kQ MCR10 Resistor 10 kQ MCR10 Resistor 100 kQ MCR10 Resistor 39 kQ MCR10 Resistor 1 MCR10 Ceramic 0 001 uF GRM40 Ceramic 0 001 uF GRM40 Ceramic 7pF GRM40 Ceramic 0 5 pF GRM40 Ceramic 0 001 GRM40 Ceramic 0 001 GRM40 Ceramic 0 001 GRM40 Ceramic 0 001 GRM40 Ceramic 47 pF GRM40 Ceramic 0 001 uF GRM40 Ceramic 0 001 uF GRM40 Ceramic 0 001 uF GRM40 Ceramic 0 5 pF GRM40 Ceramic 7 pF GRM40 Connector BNC R111 E Connector BB04G 10M Connector BB04G 10M P C Board B 1586B VCO P C Board B 1604 COIL Jumper 72 98 050 X98 X98 Jumper 72 98 050 X98 X98 Jumper 73 98 020 X98 X98 Jumper 73 98 020 X98 X98 Jumper 7 Nee 8 4 TONEUNIT Versions 05 09 DESCRIPTION S7116A uPD4094BG P C Board B 1585C Filter Spacer 41590 Tube IRRAX d 0 7 L 8 0 Tube IRRAX d 0 7 L 10 0 Crystal RF4A3FAA 3 579545 MHz 8 3 VCOUNIT DESCRIPTION Transistor 2SC37723 FET 2SK210 Y Transistor 25 3772 3 Trimmer 47 kQ
53. urrent is Increased 3 Voltage Waveform When the Current is Increased 4 Voltage Waveform When the Current is Stable When the rectified voltage is less than 9 V the saw tooth wave generator circuit 02 charges C9 to 47 8 V 0215 turned on When the voltage exceeds 9 V C9 discharges through Q5 Diagrams 2 4 creating a saw tooth wave voltage This voltage is applied to IC2 pin 12 When the voltage is less than 9 V 2 pin 11 is HIGH and 04 are turned on A pulse applied to the gate of the SCR D6 turns on D6 D6 remains on if the current exceeds 9 V The entire rectified wave 360 is applied to the anode of D6 When the voltage becomes less than 9 V reverse bias turns off D6 53 55 used to select the correct impedance of the series R37 R42 and thus the charging current R37 R42 are connected in series between the battery and ground C16 and R14 differentiate the voltage across these resistors The resulting voltage is applied to the differential amplifier Q5 Q6 The Vcc voltage 9 V divided by R11 and R12 is applied to the base of Q5 Q5 collector current control led by the base voltage of Q6 controls the discharge time constant of C9 When the charging current exceeds a specified level Q6 collector current increases O5 collector current decreases increasing the discharge time constant of C9 Hence the gate of D6 receives a pulse with a delayed phase angle decreasing th
54. z 240 V AC 50 Hz BATTERY PACK SPECIFICATIONS when using BC 35 or BC 36 Capacity mAh Voltage V Charging Time hrs 9 0 drycells fe 7 2 NiCd 8 4 1 5 15 15 Charging Current mA 600 25 600 Usable Temperature Range 50 F 104 F 10 C 40 C 0 C 40 C 32 F 104 F 0 C 45 C 32 F 113 F 10 C 40 C 50 F 104 F 10 C 40 C 50 F 104 F 10 C 40 C 50 F 104 F 10 C 45 C 50 F 113 F 39 1 5 39 1 5 80 3 1 80 3 1 60 5 2 4 When sold with IC 2GA or IC 2GAT Southeast Asia versions BP 4 comes with drycells NEVER charge drycells Replace them with six AA NiCd batteries before charging 10 2 PANEL DESCRIPTION POWER SWITCH Turns power on and off CHG INDICATOR Lighted when charging Goes out after charging is completed PWR INDICATOR Lighted when the power is on BATTERY PACK INSERTION SLOT CHARGING TERMINAL Corresponds to the terminals on the base of a battery pack MICROSWITCHES The microswitches select the correct current and capa city for each battery pack 10 1 10 3 BLOCK DIAGRAM AC INPUT 100 117 230V Transformer Saw Tooth Wave Generator Q2 25 1015 Reverse Flow Stopper 014 151555 Voltage Regulator D1 RD9 1EB1 Q1 2SC1815 POWER IND Rectifier

IC-2GA-T-GE

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