Service Manual TL-120
Contents
1. 90 120 C Lo AAA 1 47 pss Control 35 DIN Connector STBY MK 20A IN Control E Connector Protection antro I Control A 4 Protection m 2 Terminal Plate uA On Air 4A OUT V stay 2 9 7 Fig 1 Block Diagram CIRCUIT DESCRIPTION Power Reduction Circuit against Mis matched Load When the load impedance is other than 500 VSWR gt 1 the ALC circuit tries to keep the travelling wave level at the rated level so that the power transistors are not overdriven In such a case the power loss and amplifier deterioration in creases eventually leading to breakdown To prevent this the reflected wave 15 detected and used to regulate down the amplifier driving power The power amplifier operates then as if the supply voltage is lowered The circuit is designed so that the travelling wave level is decreased to about 35W when a load of 1500 is connected VSWR 3 From Control Unit Filter B 35W Adj 1500 Dummy Load Fig 3 Power reduction circuit against mis matched load Power Reduction Circuit against Supply Voltage Drop lf the supply voltage drops the maximum allowable amplitude of the collector voltage of the power transistors is lowered However the ALC circuit operates to keep the rated output power resulting in overdrive of the power R13 ik ALC line2. 13 8 13 8V OUTPUT POWER 94W 500 OUTPUT POWER 72W 500 SIGNAL FREQ 7 15 MHz 0 SIGNAL FREQ 28 8 MHz g 2249 o 5 1 60 IH 1 p 22 01 26 190 1 100 10 100 m CARRIER B m IN MHz CARRIER FREQUENCY IN MHz SPURIOUS RESPONSE HARMONICS 0 20 OUTPUT POWER 94W 500 29 SIGNAL FREQ a a z 40 5 60 E 10 100 CARRIER FREQUENCY IN MHz
3. 423 1440 04 7P DIN Socket 6 0751 05 Screw 2 Earth Screw 30 2604 46 9 02 ie S P Wing nut 14 0509 05 Diode 531 11 2 163 86 Nut Connactor Mounting Metal IN10 2040 46 21 2640 05 Spring Washer N16 0040 46 Screw N30 4016 46 Screw p D 9 ge Red 2P Terminal Plate E20 0282 05 Self Tapping Round Head x 2 Square Connector 1 1 2022 05 06 0151 05 Chip Jack Black 06 0102 25 9 Rear panel disaasembly Self Tapping Round Head Screw 3 10 Washer F29 0014 04 Self Tapping Round Head Screw3x6 03 250235 A V04 0046 05 Y 1 a2 snr1714 VOB 101 E I Self Tapping Round Screw 3 x 10 Thermostat Metal Self Tapping Round Head Screw 3 10 Insulating Mica F20 0078 05 Spacer x 4 131 0510 04 Fw Ps zb e Radiator 01 0741 03 10 unit disassembly 14 2 P 3 TROUBLESHOOTING No power from power supply Power switch voltage line shorted to ground Defective plug wiring Defective cord Defective switch Switch loose contact Defective PAB Line wiring Loose contact of PAB cable socket No 13 2 Line Se
4. 220 100uF 0 047 uF 0 01 uF 0 047 uF 0 68 470uF 0 01 uF 20 Mica 150pF 5 RESISTOR POTENTIO METER R2 HST14AB3D2R7J Metal 2 13 5 2W 4 7 514 3 90 5 TW R9 10 RS14AB3AB5RBJ 5 69 5 TW R12 13 RSI4AB3A5R6J Metal 5 60 5 TWW R1 3 RCOBSGF2HOCOOJ Solid OOO 5 1 2 8 11 R14 17 RHD1ACB2ECXXOJ Carbon OOO 5 VR1 12 3419 05 Semi fixed resistor B SRF1714 2502354 25 733 SV 03 Transistor Transistor Transistor Diode 04 0046 05 V03 0183 05 22 0031 05 COIL TRANSFORMER L33 0624 05 L33 0622 15 L33 0025 05 L40 1011 03 Choke coil Choke coil 15uH Choke coil 1 3uH Ferri inductor 100 2 44 13 0305 05 119 0312 05 119 0313 15 Input matching transformer Output transformer NF Transformer MISCELLANEOUS V11 2260 16 559 1403 05 559 1404 05 STP31L Thermostat insulating type 120 C Thermostat insulating type 90 C Thermistor 1 0451 05 1 0452 05 Cable DC RED Cable DC BLACK F20 0078 05 F29 0014 05 Insulating mica Insulating washer Spacer x 4 J31 0510 04 a f PARTS LIST FILTER UNIT X51 1210000 marks CAPACITOR Re mee PUCO C34 35
5. 45512 390 03 1815 06 Transistor 25C18 1517 01 1015 06 Transistor 2SA10151Y Ceramic trimmer 10 03 1815 06 Transistor 2501815 01 0032 05 Transistor 25 562 03 1815 06 Transistor 25C1815 03 1959 06 Transistor 2501958 V01 0113 05 Transistor 25 496 SEMICONDUCTOR COIL Q12 15 V03 1815 06 Transistor 28 18151 016 01 0032 05 Transistor 2SA5621Y1 Diode 1N60 Q17 V03 1815 06 Transistor 25 1815 V11 0051 05 NOT USED 4 4 1 L39 0406 05 Detector coil 91 VETUS TS Diode 02 11 0076 05 Diode 151555 L40 1021 03 Ferri inductor 1mH 03 11 4171 05 Zener diode 2 142 L34 0896 05 Filter 3 5 MHz 34 0829 05 Filter D 21 MHz 11 4172 06 enerdiode XZ 162 L34 0827 05 Filter coil 8 7 MHz a I lt 11 4162 16 Zener diode 7 132 L34 0828 05 Filter 14 MHz 411 0078 05 151555 L34 0830 05 Filter coil V11 0243 05 Zenerdiode WZ 061 MISCELLANE 5 22 V11 0076 05 Diode 181555 2 Ceramic 25 CC45CH1H121J Ceramic 45 1 1214 Ceramic 120pF 5 CEOAW 1HO10 Electrolytic luF Ps i ET CE04W1HR47 Electrolytic
6. 5 a m x KENWOOD ON AIR M 11 11 PROTECTION POWER LINE AR ON OFF LINE Ar AMPLIFIER LINEAR AMPLIFIER CONTENTS SPECIFICATIONS SPFEGIFICATIONS erae mro FEATURE rine ee ee A to EUIS CIRCUIT DESCRIPTION SEMICONDUCTOR u INSIDE VIEWS VETAT A eic PA UNIT FILTER UNIT 1 1210 00 CONTROL UNIT 53 1150 61 LED PC BOARD 25 2707 04 L L uuu u REFERENCE DATA IEXANPLEJ u u 18 CIRCUIT DIAGRALNMA Oo 0 onan SPECIFICATIONS y P M O 3 Transmit Frequency Range 35 MHz 297 MHz Power 10W Collector Input 3 5 MHz 21 MHz 160W 28 MHz 140W input Output Impedance 509 Power Supply DC 12 16V 13 8V Power Consumption 15A DC 13 8V Semiconductor Complement Transistors 20 Diodes 22 Dimentions 123 123 Wide x 97 107 High x 235 265 Deep Values in parenthesis include protrusions Weight 2 3 kg NOTE Specifications are subject to change for improvements FEATURE GIRGUIT DESCRIPTIONS
7. 2 ToTS 120V x ALC Adj 95W rn 27 tOut6V 10 12 14V Supply From 13 2V DC DC Converter RIG IK x gt n oe v 14 5 21 Q1 is switched for 3 5 to 9 O28 21 MHz band but 28 MHz is switched OFF Then power D 14 output reduce until 75W 35 28 MHz band 51 3 Band SW t Fig 4 Power reduction circuit against supply voltage drop and power reduction circuit for 28 MHz 4 amplifier This increase in distortion causes unstable opera uon of the amplifier To prevent this the ALC threshold level is regulated by the supply voltage so that the limited power level by ALC is reduced when the supply voltage drops When the supply voltage rises the limited power level by ALC also increases and a circuit which is provided keeps the output power constant if the supply voltage exceeds about 14 Radiator Temperature Control Fan Circuit A thermistor 18 mounted the radiator for power amplifier control of the cooling fan The circuit is the same as that used for 75 1205 Even if the LINEAR switch is turned to set the linear amplifier in a standby state the cooling fan con tinues to operate until the radiator temperature drops to a certain level From AVR When the radiator temperature is raised to 50 C the thermistor with a resistance of 1 at 252 C activates 014 and 015 and turns ON 016 to rotate the cooling fan Fig 5 Radiator temperature d
8. 5621Y 010 2 1959 011 2SA496 Y D1 TN60 D2 7 11 13 15 17 21 181555 D3 XZ 142 S 04 2 162 D5 WZ 090 D6 2 132 D16 WZ 061 4 c uw t NOOK AI gessi E O B mj LIST Note 1 K U S A W Europe T Britain Note 2 Only special type of resistors example cement metal film etc and capacitors example electrolytic tantalum mylar temp coeff capacitors are detailed in the PARTS LIST For the value of all common type components refer to the schematic diagram of the PC board illustration Resistors not otherwise detailed are carbon type 1 4 or 1 8W Order carbon resistors and capacitors according to the following example A carbon resistors part number is RDI4BY 2E222 A ceramic capacitor s number is 1032 1 220 RESISTOR 1 Type of the carbon resistor 3 Resistance value 22 2 means 22 x 102 22000 2 2 RD14BY RD14CY Significant figure Multiplier 2 Wattage Example 221 2200 224 220 kR 222 2 2 2252 2 2 MQ 223 22 1 8W 2B 4 Tolerance J 5 Gold CAPACITORS 10 Silver 1 Type ceramic electrolytic etc e 2 Shape round square etc Type Type 11 3 Temp range 3 Temp coefficient CK 45 E iH 193 E 45 TH AH 220 4 4 Voltage rating 1 2 3 4 5 6 1 2 3 5 6 5 Value 6 Tolerance 6 T
9. FEATURES CIRCUIT DESCRIPTION e All solid state medium power linear amplifier for TS 120V ALC Circuit e A DC input power of 160W or more 150W or more at 28 MHz band ALC circuit power reduction circuits for protection against mis matched load and supply voltage drop to prevent from distorted RF signal over drive Effective fan cooling for power transistor protection The fan 1s controlled from radiator temperature e Protection circuits to protect power transistors 1 Erroneous band switch setting protection circuit 2 Radiator overheat protection circuit 3 Output transformer overheat protection circuit From Filter Unit Motorola SRF1714 as power amplifier Collector current measuring terminals p Easy to connect with TS 120V and PS 30 With connec cable PS 30 on off contra by power switch of 75 120 The output travelling wave level is monitored and the output power kept to 95W at 14 MHz 500 load For bands other than 28 MHz band detected voltage is divid ed across resistors and applied to the ALC control amplifier The output power is therefore higher at 21 MHz or the lower band than at the 28 MHz band The dividing ratio is selected so that about 7OW is obtained at the 28 MHz band when 95W is obtained at the 14 MHz band The divider ON OFF transistor Switch is controlled by the band selector To TS 120V ALC Adj 95W Fig 2 ALC Circuit IN OUT b Detector i
10. O 47uF 50WV CEO4AW1H010 Electrolytic 50WV CC455L2H581J Ceramic 596 45512 1 560pF t 596 91 0456 05 OO TTAP eu CCA5SL2H561J Ceramic 560pF 5 CEOs Electrolytic Mero ita 455127 27 1 Ceramic Se CC45SL2H331J CEOAW1C221Q Electrolytic 2204F 16WV CCA5SL2H560J 56pF 15 CE04W1HR47 Electrolytie 0 47 50WV A CC45SL2H101J 100pF 596 See aue a CC45SL2H121J Ceramic 120pF 55 1 2210 Electrolytic 220uF 16WV CCA5SL2H560J Ceramio 56pF 555 C91 0456 05 Ceramic 0 047 25V 45512 151 150pF 5 45512 181 180pF 5 45512 331 Ceramic 330pF 5 4554281513 180pF 458 45512 181 1 180pF 55 TENES nee CCABSL2H151J 150pF 5 05 0042 05 Ceramic trimmer 10pF osa gi ns apo R12 3054 05 47 kt B 35W Adj ALC Adj 45512 151 Ceramic 150pF 5 f R12 1406 05 1 B SVAVR Adj CCA5SL2H181J Ceramic 180pF 5 R12 0408 05 1009 B Ic Adi 28 31 45512 390 Ceramic 39pF 5 i C32 33 CC455L2H820J Ceramic 82pF 3 556 SEMICONDUCTOR 4 0154 05 23 0047 05 Coaxial connector 12 Terminal J31 0502 04 J42 0404 05 Board
11. color PC Board bush L39 0406 05 140 1021 03 Detector coil Ferri inductor 1 mH CONTROL UNIT 53 1150 61 Re MISCELLANEOUS 551 4402 05 Relay CAPACITO R 04 0154 05 23 0047 04 Coaxial connector x 4 Terminal x 5 PACKING DISASSEMBLY PACKING Operating Manual B50 2681 00 Cushion H12 0465 04 Accessory Bag 25 0112 04 Accessory Fuse FO5 2304 05 Coaxial Cable 42 1120 10 REMOTE Cable E30 1640 05 Cord E30 1638 05 Cable E30 1637 05 Fuse Holder J13 0404 05 Fuse F05 2034 05 Protective H20 1407 03 Front Packing Fixture 7 10 2513 02 Rear Packing Fixture H10 2514 02 Carton HO1 2647 04 gt DISASSEMBLY lt Qu Case A01 0732 03 Y a Case 01 0758 02 Foot x 4 Knob 402 0323 05 21 0723 04 oet Fitting Mers as Accistance Foot A J02 0409 04 Selftapping round head screw 87 3006 46 a Fig 7 Case disassembly 12 13 23 1440 04 Control Ass 53 1150 61 45 1130 00 Ass y DISASSEMBLY 8 Frontpanel disassembly Mounting PC Board Switch Ass y Fig 51 1210 00 Filter Ass y LED PC Board d J25 2707 04 gt LED Mounting Diode Holder 3 J19 1317 04 DISASSEMBLY M Type Receptacle 04 0152 05
12. d check that DC volt is 13 2V 0 2 Base current adjustment e instrument 1 DC current meter 200 mA 10 2 Voltmeter ADJUSTMENTS Adjusting procedure PC BOARD ALIGNMENT 1 Connect the current meter between REDWIRE and REARPANEL RED WIRE in the PA unit CONTROL UNIT 53 1150 61 X45 1130 00 Place STBY SW to SEND exciter and after 15 seconds adjust VR1 on the unit for 200 mA Place STBY SW to REC the exciter connect the 2 2 Check 13 2V 0 5V FAN VER EVRE 3 B exciter terminal TL 120 IN terminal Then Con 75 nect the voltmeter to terminal on the Linear amp 39W Adj 1500 Dummy oll LS 3 Place STBY SW to SEND on the exciter and reduce the GND 21355 VR so the current meter reads 10A Connect the iki voltmeter to lc terminal the rear panel and adjust Teis Protection VR4 in the CONTROL unit X53 1150 61 for voltmeter reading of O 1V Then connect the RED WIRE FINAL to REDWIRE the rear panel Must be STBY SW to REC if connect between REDWIRE and REDWIRE rear panel 3 ALC adjustment 7 Instruments VIEW ALC Adj 95W y 1 Power meter Adjusting procedure FILTER UNIT X51 1210 00 1 Exciter CAR VR is FULLCLOCKWISE place STBY SW TOP VIEW VIEW to SEND Adjust VR2 on the CONTROL unit X53 1150 61 until the RF POWER
13. ea LAM 25 733 lt ctam 25 01 3 5 55 San 58 oc I jum 58 4 r k 3 ai ah 54241554 52891 T j3 17722 UIT re 250235 ably 50 8 og hipa vE 247 ais 27 13 02 1 08 A30 D c2z 4 AT HAE Rad 2 R26 Bis 3 015 2 I3 xs 432 220 TEV 33K Hih 47 a y 100 1 0 SRF1714 LA 4 1N60 02 7 41 e 13514 17 151555 D3 2 142 2 04 gt XZ 162 ds D5 WZ 050 IN 06 DXZI 132 Dis WZ 061 k edi TLG 205 Da TLR 205 TL 120 J 19 NN O CCCC C L o sees sd REFERENCE DATA EXAMPLE SPURIOUS RESPONSE HARMONICS RESPONSE HARMONICS I 0 0 es Vcc 13 8V dp Vcc 13 8V 20 LOUTE T POWER 20 OUTPUT POWER 96W 500 ra laret v rSn SIGNAL FREQ 21 225 MHz i t gt 40 40 2 7 o B0 e a B 60 u p e 100 21 rm 10 100 CARRIER FREQUENCY IN MHz CARRIER FREQUENCY IN MHz SPURIOUS RESPONSE HARMONICS SPURIOUS RESPONSE HARMONICS eran 0
14. ee saw Switch 536 2404 05 knob 3 Nu K21 0723 04 F lt Ling ay T Panel Foot x 4 20 2367 03 ME m t 702 0323 05 REAR PANEL 7P DIN Socket E06 0751 05 __ Chip Jack black 06 0102 05 _ Chip Jack red 06 0151 05 type Receptacle EOA d 04 0152 05 __M type Receptacle 04 0152 05 Wing Nut N14 0509 05 __ Power Connector EX E31 2022 05 2 Terminal Plate 20 0282 05 1 Ka es 1440 04 VIEWS Unit 45 1130 00 FILTER Unit X51 1210 00 CONTROL Unit X53 1150 61 Rotary Switch 501 2420 05 5 BOARD 25 733 Y UNIT 45 1130 00 250235 Y SRF1714 SRF1714 28D235 Y 01 2 03 25 733 SV 03 04 1 00 1210 FILTER UNIT 51 1 60 LI o W LED PC BOARD J25 2707 04 D2 TLY 205 PG BOARD 5 T 4 o gl 2 s z M m m oc gt e Wap Wan G Y Wr 645 mp CAMeSNOL2EH u REMOTE CONTROL UNIT X53 1150 61 F Ha IA gt 2SA10151Y 28C1815 Y 25C1959 Y x w 01 3 5 7 9 12 15 17 2SC1815 Y Q4 28A10151Y 08 16 2SA
15. etecting type cooling fan con trol circuit Erraneous BAND Switch Setting Protection Circuit The power amplifier is a push pull broad band amplifier which has no tuning circuit Therefore higher harmonic components must be suppressed by some other means For this purpose a LPF is provided for each band and the LPF used is selected by the BAND switch The input impedance of LPF viewed from the power amplifier varies greatly at fre quencies higher than the cut off frequency even if the 500 load is connected to the output If the exciter frequency exceeds the LPF cut off frequency i e the band setting of 5 120 is different from that of TL 120 the power amplifier load is greatly mis matched and results in an abnormal operation of the power transistors To pre vent this a reflected wave detection circuit is provided between the power amplifier and LPF This circuit actuates the protection circuit when it detects a reflected wave from an incorrect band setting gt CIRCUIT DESCRIPTION SEMICONDUCTOR DATA The protection circuit places TL 120 on standby and is directly connected to the antenna To relase the protection circuit set the exciter to receive and the BAND switch of TL 120 to the same band as the exciter Set the LINEAR switch to the STBY position After the PROTECTION Indicator goes off switch from LINEAR to OPERATE This protection circuit functions only when the exciter frequency is h
16. hip JACK Red terminal Chip JACK Black terminal 7P DIN Socket REMOTE 2P terminal plate DC13 8V 4A OUT Cable DC cord REMOTE Cable Coaxial Cable A BAND Square Connector 2034 05 F09 0405 04 Fuse 20A 2 Fan 01 2647 04 10 2513 02 10 2514 03 12 0465 04 20 1407 03 25 0029 04 25 0112 04 Front packing fixture Rear packing fixture Cushion Protective cover Protective bag 60 110 mm Protective bag 180 250 mm J02 0323 05 Foot 4 J02 0409 04 Accistance foot J13 0404 05 Fuseholder J19 1317 04 Diodeholder J61 0201 05 Vinyle tie 21 0723 04 Pointer knob BAND SW 08 0256 05 N14 0509 05 Earth screw x 3 Wing nut GND terminal T40 0301 05 FAN motor 42 1120 10 Coaxial cable 5 45 1130 00 unit Tr X51 1210 00 FILTER unit w 53 1150 00 CONTROL unit YT PA UNIT X45 1130 00 2b a R CC45SL2H101J CK45D2H222M CMS3D2H68814J 45512 221 CE04W1C1010 C91 0465 05 CKA51H103Z 91 0456 05 1042 91 0448 05 CEO4W1H471Q 1037 USED CM83D2H151J 5 20 5 5 Ceramic Mica Ceramic Electrolytic Ceramic Ceramic Ceramic Ceramic Layer built Electrolytic Ceramic 100pF 0 002 2 uF
17. igher than the LPF cut off frequency band setting of TL 120 lt band setting of TS 120V When band setting of TL 120 gt band setting of TS 120V the input impedance of LPF matches with the power amplifier and the protection circuit is inoperative However higher harmonic components pass through LPF resulting in deterioration of the transmitted signal quality When a problem occurs in the antenna system and VSWR increases greatly this protec tion circuit may cut in before the power reduction mis matched protection circuit Filter Unit X51 1210 00 o HT To LPF Transistor SRF 1417 x 2 E Protection Control Unit 59 1150 61 178 a 004 08 5 zi mmi gs 7 Radiator Output T 4 Transformer 2 QU 14 RAS TK E 2255 E T TS 120V Fig 6 Erroneous BAND switch setting protection circuit Radiator and output transformer overheat protection circuits Radiator and Output Transformer Overheat Protection In the normal operation the cooling fan prevents the power transistor temperature from rising greatly However if the ventilation is not sufficient transmission is continuous or if the cooling fan circuit mal functions this temperature may rise steeply As a precaution two overheat protection cir cults are provided One is a thermostat which detects and opens when the temperature of the radia
18. iter 1 3 reading INPUT LEVEL IN mV SIGNAL FREQ 14 170 MHz MODE CW MIC GAIN 9 O CLOCK EXCITER TS 120V OUTPUT CHARACTERISTIC 3 5 ET 715 440 35 21 225 28 0 29 7 275 70 73 14175 210 2145 288 CARRIER FREQUENCY IN MHz ALC READING RF SCALE 5 VOLTAGE Don LILI SIGNAL wm CONTROL SIGNAL transmission gt fan operated 5 1130 00 L1 wx M VII _ _ R4 3 5 Tw c 0022 c3 0022 c5 0022 0022 cage Q1 2 SRF1714 25CT7T33 Y TSI cec SCHEMATIC DIAGRAM 2 COMMON VOLTAGE LINE CONTROL UNIT X53 1150 00 t 3 EE us 1 ALi ESAE TPS sl hey 5 Lzcm Dy lt Tua caso 5 2 L 5 gt g 228 E SI sje sl I I R23 15K 150 01 um FERES LF iF ny tm gt lt 200 0 z MATIC DIAG RAM The curcuit and ratings change without notice due to developement in technology IE 2SA1015 Y 25 1815 5 195 TROL UNIT 53 1150 00 0143 547 010 25 4959 T 9 185 37 2501815 2SA4961 Y1 A 94 1 2SA1015 Y 46 25456 M
19. meter reads 95W 4 Protection adjustment Instrument 1 Power meter 2 Voltmeter 3 RF dummy load 1500 100W e Adjusting procedure 1 3 750 MHz TL 120 21 Band Turn STBY SW to SEND maximum output is detained with TL 120 Connect the voltmeter to TP1 on the FILTER unit X51 1210 00 and adjust 1 on the FILTER unit for volt reading of dip point Excite 14 250 MHz TL 120 14 MHz Band turn STBY SW to SEND Connect the voltmeter to TP1 on the CONTROL unit X53 1 150 61 and adjust on i the CONTROL unit for volt reading of dip point Exciter 28 000 MHz TL 120 28 MHz Turn STBY SW to SEND and adjust the CAR LEVEL VR so ALC meter reads Limit of ALC zone Turn STBY SW to REC with the BAND to 21 MHz turn STBY SW to SEND again adjust VR1 on the FILTER unit 51 1210 00 so the PRO indicator lights 4 Exciter 14 250 MHz TL 120 14 MHz Band connect the BIRD power meter and 150 ohm RF dummy load then turn STBY SW to SEND and adjust the CAR LEVEL VR so the ALC meter reads limit of ALC zone adjust VR1 on the CONTROL unit 53 1150 61 until the BIRD power meter reads 35W FORWARD RF POWER PA UNIT X45 1130 00 s s F Base Current 200 n3 18 OUTPUT POWER WATTS POWER IN WATTS EFFICIENCY REFERENCE DATA EXAMPLE OUTPUT VS INPUT ii TS 120V only exc
20. olerance a el wom 40 80 100 More than 10uF 10 50 m 4 Less than 10 Capacitor value Example 010 1 pF oF 0 1 0 26 055 1 2 LN 102 1000 pF 0 001 uF 3 CK45F 103 0 01 uF Ceramic capacitor Type 1 CCAS 30 0 0 Color 2 1 1 Bb Operating temperature 30 30 85 85 3 4500 Ceramic capacitor Il temperature coeff capacitor 17 3 itwod CH LH PH RH s TH UH Color Black Red Orange Yellow Blue Violet PARTS LIST GENERAL Ref No Parts ee CK45F1H4737 Ceramic 00474 80 20 New parts R92 0520 05 Cement resistorl Smi V11 2163 86 Diode S31C 11 3163 16 TLY 205 V11 3162 86 LED TLG 205 V11 3162 86 LED TLR 205 501 2420 05 536 2404 05 Rortary switch BAND See Saw switch POWER MODE A01 0732 03 Case 01 0758 02 20 2367 03 23 1440 04 39 0407 04 B50 2681 00 Spacer 2 for assistance leg Operating manual 04 0152 05 0151 05 6 0102 05 6 0751 05 20 0282 05 E30 1637 05 E30 1838 05 E3O 1640 05 E31 2018 05 1 2022 05 M type receptacle 2 OUTPUT INPUT C
21. tor exceeds 90 C The other also a thermostat connects the output transformer and opens when the temperature exceeds 170 C When one of these thermoswitches opens TL 120 is brought into STBY 5 120 is connected directly to the antenna If any of these protection circuits operate set the LINEAR switch to the STBY position take countermeasures to cool the instrument until the PROTECTION indicator goes P rotection will not be released unless the LINEAR switch is set to the STBY Collector Current Measuring Terminals A 15 mt shunt resistor is provided in the collector power supply circuit of the power transistors Measuring terminals are connected to the both ends of the resistor The collector current is found by measuring the voltage across the resistor a correction circuit is provided a precise value can be obtained The conversion rate is Semiconductor Data SRF 1714 08 1011 06 01 2 on the PA Unit Application RF band power amplifier Absolute Maximum Ratings 25 in 65 1 Minimum ei veiw 38 Gren 4 Ro 108 EMITTER BASE EMITTER COLLECTOR Pw j a 3 OUTSIDE VIEWS INSIDE VIEWS gt FRONT PANEL Case LED TLY 205 23 11 3163 16 01 0732 03 TLG 205 V11 3162 86 Case B B TLR 205 __ 0758 02 V11 3162 96 S
22. tting Zenerdiade 06 ALC Detector Transmitter Output LOW Check PAB Line OK Check PAO in PA unit OK Check BSO in control unit OK OUTPUT Terminal Check FC voltage in control unit NG NG NG Check exciter Defective 06 2 132 Defective 04 5 6 Defective D in Control unit VR2 requires adjustment in control unit Defective Q2 in control unit Confirm circuit description Protection operated Defective EXT Power Supply or 13 8V require Defective 01 2 Base current requires adjustment Defective L1 in Filter unit Defective PAO BSI in Filter unit BAND SW burn up broken and Loose contact Defective RL1 1 in Control unit VR2 requires adjustment in Control unit Defective Q14 16 in Control unit Defective Fan motor check FAN terminal voltage 15 ADJUSTMWIENTS TEST EQUIPMENT REQUIRED 1 STVM or DVM 1 Input resistance More than 1 0 2 Voltage range 1 5 to 20V DC High precision voltmeter maybe used However accurate readings can not be obtained for high impedance circuits 2 DC CURRENT METER Current range 2 20A Note High precision current meter maybe used 3 RF DUMMY LOAD 1 Impedance 500 1500 2 Dissipation 100W continuous or greater 4 BIRD WATT METER Dissipation 100W contin
23. uous or greater 5 DRIVE EXCITER Input 16 to 20 watt ex TS 120V 6 POWER SUPPLY 13 8V 20A min 5 30 or higher class PREOPERATION Remove the upper and lower cases as shown below Figure 11 2 Power supply voltage is 13 8V 20A operation 3 Disconnect PAB red wire in the P unit and red wire of rear panel 4 Disconnect the coaxial cable between exciter TS 120V and Linear amp 1 1 120 5 If power transistor are changed in the unit X45 1430 00 They must of same rank 11 Case disassembly SRF1714 V08 1011 06 CONNECTION Connect the Linear amp TL 120 TS 120V shown below Fig 12 TL 120 a Exciter T5 120V Power supply BIRD P5 30 Power meter Fig 12 Connection between TL 120 and exciter TS 120V SETTING 1 EXCITER 5 120 BAND 14 250 MHz MODE CW STBY SW REC CAR VR Counterclockwise POWER SW ON etc Free 2 TL 120 POWER SW OFF LINEAR SW STBY BAND SW 14 MHz BAND 14 MHz CONTROL UNIT VR1 VR2 Fullclockwise FILTER UNIT VR1 Fullclockwise ADJUSTMENT 1 9V adjustment and check DC DC converter e instrument 1 Voltmeter or Digital voltmeter e Adjusting procedure 1 Connect the digital voltmeter to on the CONTROL unit X53 1150 61 and adjust VR3 on the CONTROL unit for 9 0 O TV 2 Connect the digital voltmeter to TP2 on the CONTROL unit X53 1150 61 Then turn OPERATE LINEAR SW an
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