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Realistic Welding System 20-113 User's Manual

1. Ceramic 0 001 10 DD104B102K50 Electrolytic 47 uF 16WV 20 16MV470HA Ceramic 5pF 50WV 0 25pf DD104SL050C50 Ceramic 10pF 50WV 0 5pF DD104SL100D50 Ceramic 22pF 50WV 5 DD104SL220J50 Ceramic 0 001 10 DD104B102K50 Ceramic 0 001 5DWV 10 DD104B102K50 Ceramic 220pF 50WV 10 DD104B221K50 Ceramic 47pF 5 DD104SL470J50 Ceramic 0 0014F 50OWV 10 DD104B102K50 Electrolytic 47uF 16WV 20 16MV470HA Ceramic 0 01pF 80 20 DD106F 103250 Ceramic 0 01 80 20 DD106F103Z50 Ceramic 0 01 80 20 DD106F 103250 Ceramic 0 001 uF 10 DD104B102K50 Ceramic 0 014F 50WV 80 20 DD106F 103250 Not used Ceramic 0 01uF 50WV 80 20 DD106F 103250 Ceramic 0 0014F 210 DD104B102K50 Ceramic 0 01uF 80 20 DD106F 103250 Electrolytic 47uF 16WV 20 16MV470HA Tantalum 0 22uF 35WV 10 DN1VR22K1S Mylar 0 01 uF 50WV 10 AK1 UU103K Ceramic 5pF 50WV 0 25pF DD104SL050C50 Ceramic 470pF 210 DD104B471K50 Ceramic 470pF 210 DD104B471K50 Ceramic 39pF 5OWV 5 DD104SL390J50 Ceramic 0 001 uF 50WV 10 DD104B102K50 Ceramic 22pF 5OWV 5 DD104SL220J50 Ceramic 100pF 50WV 5 DD105SL101J50 Ceramic 0 047 uF 50WV 80 20 DD110F473250 Tantalum 0 47 uF 35WV 10 DN1VR47K1S Tantalum 0 47 uF 35WV 10 DN1VR47K1S Ceramic 10pF 50WV 0 5pF DD104SL100D50 Electrolytic 22
2. Zener Zener Zener Zener Rectifier MB504P G TK10420 TC4066BP TA78006AP uPD4069UBP TC4069UBP 152076 Silicon 152076 Silicon 152076A Silicon 1S2076A Silicon HZ12C2L Silicon 152076 Silicon HZ16 3L Silicon 1S2076A Silicon HZ7B2L Silicon 1S2076A Silicon 1S2076A Silicon HZ12C2L Silicon S5277B Silicon 1B4B41 Silicon 152076 Silicon 152076 Silicon 152076 Silicon 152076 Silicon 152076 Silicon 152076 Silicon 152076 Silicon 15207 6A Silicon 152076 Silicon 152076 Silicon 152076 Silicon 152076 Silicon 152076 Silicon 152076 Silicon 152076 Silicon DX 1056 DX 1056 DX 1056 DX 1056 DX 1056 DX 1056 DX 1056 DX 2543 DX 1056 DX 1056 DX 2513 DX 1056 DX 1056 DX 1056 DX 1056 DX 1056 DX 1056 DX 1056 DX 1056 DX 1056 DX 1056 DX 1056 DX 1056 DX 1056 DX 1056 DX 1056 INTEGRATED CIRCUITS PLL Prescaler Bipolar Amp Det Bipolar Mute Band Selector Quad C MOS Voltage Regulator Bipolar SQ Cont Beep Tone Gen C MOS puPC324C LA6324 Zeromatic Cont Audio Amp MC145158 HPD4094BC TDA1905 81250HG GRE 0437A uPD446G 20 TC5517CF 20 Bipolar PLL C MOS Band Selector C MOS Audio Power Amp Bipolar CPU Voltage Regulator C MOS CPU C MOS Memory Back Up C MOS 25 MX 4012
3. Program 68 MHz CH1 78 MHz CH2 88 MHz CH3 Select Channel 1 68 MHz and adjust T3 and T6 for maximum RF waveform Check the Channels 1 3 one by one for maximum RF waveform Slight deviation as shown below is acceptable RESPONSE dB FREQ MHz 43 SCHEMATIC DIAGRAM GD Gp Ka aw 22 9 T E 53 ER gu suour QD Em md 11 4 6R N785 eo 72 3 hk a L3 4LMC 092 Es v n 5 28 5 X oni S S 5 ne 81 2 18 59 51 2 af 8 J lt D Cal x EN 4 4 DRS gt 10087 21 op 3 8 Oy RM2OC2 14 5 ELNA 093 492 06 25225680 1 10 6 09 2502458 ICA LCD PANEL 521 40948 Swt the thesi 4 000 qt 475 2 47 E NN 47 vun gw JAN N I a 68 gt 220 2 8 ca j 245807 GRE 704374 lt lt 5 s s s sis g E HHH E S 5 5 5 5 5 8 518181518 a Vysyvysyy I 23 2 3 pe a 8 8 3 8121818 047 048 mes on coma ex 20 CO 1 el c57 ase 1056 ass X3 Lassi faes 2 6 0 aot Xe ET User ATK pPO4466 ic 8 NOTES
4. 5 5 5 5 5 5 5 259 5 5 5 t5 5 5 5 5 5 5 5 5 5 5 25 5 5 5 5 5 5 5 5 5 15 30 RS Part Number NO521FFC MFR s Part Number R25XELO3J471 ERC 12GK185 R25XEL03J473 R25XEL03J393 R25XFC06J473 R25XFC06J473 R25XFC06J473 R25XEL03J473 R25XEL03J472 R25XEL03J103 R25XEL03J103 R25XELO03J333 R25XEL03J103 R25XELO3J155 R25XEL03J474 R25XEL03J103 R25XEL03J103 R25XEL03J103 R25XEL03J334 R25XEL03J183 R25XEL03J473 R25XEL03J104 R25X FCO6J222 R25XFCO6J222 R25XFC06J222 R25XFC06J102 R25XFC06J102 R25XFC06J102 R25XFC06J102 R25XFC06J102 R25XFC06J102 R25XFC06J102 R25xFC06J102 R25XEL03J472 R25XEL03J564 R25XEL03J100 R25XEL03J682 R25XEL03J151 R25XEL03J104 R25XEL03J222 R25XEL03J560 R25XEL03J220 R25XEL03J224 R25XEL03J473 R25XEL03J473 CAPACITORS TRIMMER Trimmer ECV 12W10x53T Trimmer ECV 12W20x53T Trimmer ECV 12W10x53T Trimmer ECV 12W10x53T Trimmer ECV 12W10x53T Trimmer ECV 12W20x53T VARIABLE RESISTORS Squeich 10k ohm C K1611008TE 10KC 20 Volume w Switch 10k ohm A RK1611111 10KA 20 MISCELLANEOUS Description RS Part Number MFR s Part Number LCD L 1975 LCBAA3021A Electro Luminescence L 1976 GE 85D 6067 Cord AC W 3388 UP 953 J01 Strain Relief Line Cord HB 0705 SR 3P 4 Cable Assembly DC Non Repairable W 3388 GA 85D 5983 Terminal Wire HB 9616 1 SD Accessory Bag for Holder AC Cord HB 1515 GE 18D 42
5. REALISTIC Service anual PRO 2021 PROGRAMMABLE SCANNER AM FM MONITOR RECEIVER Catalog Number 20 113 CUSTOM MANUFACTURED FOR RADIO SHACK A DIVISION OF TANDY CORPORATION CONTENTS SPECIFICATIONS nnen 3 BLOCK 4 PRINCIPLES OF OPERATION ru 5 GENERAL OPERATION OUTLINE 4 2 20 7 ALIGNMENT 8 RECEPTION 14 MEMORY CHECK e eene 15 5 16 BOARD TOP AND BOTTOM 5 18 WIRING 2 20 ELECTRICAL PARTS 5 2 21 DISASSEMBLY EXPLODED VIEW 32 MECHANICAL PARTS 115 33 SEMICONDUCTOR LEAD IDENTIFICATION AND IC CIRCUIT DIAGRAM 34 MICROPROCESSOR IC PORT 42 43 SCHEMATIC DIAGRAM 44
6. anr cs 2 nin 551 14751 sr 47 2130 Clas gt Rus 0 002301 4 7K EXT 95 Sex CM cus 4 7K 01 5 lt 152076 KSIE S 06 0112 E 1012 jl I 13 1 04 L 324 vos i 15 V06 026 252458104 16 07 vos 10 S 9125046 S let 2 966 31555 20 lt 2 21 RW sisislsilsisisis 519181 9 51919 3 122 ag eln as 24 siga is s s RR NOTES RESISTANCE VALLES IN OHMSI CD DENOTES VOLTAGE FOR AIRCRAFT BAND OPENATON se Lu t N DENJTES VOLTAGE FOR HIGH BAND OPERATION F 20 5 5 xixixixixixixix 4 MYLAR CAPACITOR C DENOTES VOLTAGE FOR UHF BAND OPERATION 966 eielrjninleloj s 5 MO SUFFIXED CERAWIC CAPACITOR DENOTES VOLTAGE ANY BAND OPERATION 2254 DT 53 TESTIT 6 DENOTES DC VOLTAGE MEASURED WITH DC VOLTWETER 100K UNDER FOLLOWING jajajajaj l I a CONDITIONS CH ILOW BAND AT 30MMz MANUAL OPERATION VOLUME AT MINIMUM AND b 575 160 SGUELCH COW CAUTION Copyrignt 1986 SINCE THE COMPONENTS MARKED BY N ARE CRITICAL FOR SAFETY USE ONES DESCRISED ON PARTS LIST ONLY 45 AUSTRALIA 91 Kurrajong Avenue U S PATENT NOS 3 794 925 3 801 914 3 961 261 3
7. 10 DD104B102K50 Ceramic 330pF 10 DD104B331K50 Ceramic 0 001vF 10 DD104B102K50 Ceramic 0 0014F 10 DD104B102K50 Ceramic 0 0014F 10 DD104B102K50 Ceramic 10pF 0 5pF DD104SL 100050 Ceramic 0 01 uF 80 20 DD106F 103250 Ceramic 0 001 uF 10 DD104B102K50 Ceramic 0 01vF 80 20 DD106F 103250 Ceramic 2pF 0 25pF DD104SL020C50 Ceramic 5pF 0 25pF DD104SL050C50 Ceramic 0 0014F 10 DD104B102K50 Ceramic 5pF 0 25pF DD104SL050C50 Ceramic 0 001uF 10 DD104B102K50 Ceramic 0 001 uF 10 DD1048102K50 Ceramic 100pF 5 DD105SL101J50 Ceramic 33pF 5 DD104SL330J50 Ceramic 10pF 0 5pF DD104SL100D50 Ceramic 0 001uF 10 DD104B102K50 Ceramic 10pF 0 5 0010451 100050 2pF 0 25pF DD104SL020C50 Ceramic 0 001 uF 10 DD1048102K50 Ceramic 0 01uF 80 20 DD 1066 103250 Not used Ceramic 0 001uF 10 DD104B102K50 Ceramic 33pF 5 DD104SL330J50 Ceramic 56pF 5 DD104SL560J50 Ceramic 22pF 5 DD104SL220J50 Ceramic 10pF 0 5 00104 1 100050 Ceramic 0 001uF 10 DD104B102K50 Electrolytic 10uF 20 16MV100HA Ceramic 47pF 5 DD104SL470J50 Ceramic 47 5 DD104SL470J50 Ceramic 0 001uF 10 DD104B102K50 Ceramic 470pF 10 DD1048471K50 Ceramic 47 5 0010454470450 Ceramic 10 0 5 0010451 100050 Mylar is registered trademark Du Pont de Nemours and Company 21
8. 3x8 Trusshead Tapping Screw 3x6 Trusshead Tapping Screw 3x6 Bindinghead Machine Blk Screw 3x8 Bindinghead Machine Screw 4x8 Panhead Machine Screw 3x12 Panhead Machine Screw 3x6 Countersunkhead Machine Screw 2x6 Panhead Tapping Washer Outernal Toothed Lock 4m m Washer Internal Toothed Lock 3m m Nut 4m m Screw Mounting Bracket Screw 3x10 Bindinghead Machine Bik Screw 3x6 Bindinghead Machine Blk Washer Outer Toothed Lock 3m m 33 2 0807 2 0808 XB 1188 2 0806 L 1975 L 1976 B 0217 DB 0094 B 0209 J 1783 TA 0074 5 5332 HC 2793 XB 1189 HC 3797 F 0053 MB 1003 HC 3063 K 1002 HC 3062 HD 1777 HD 1778 HD 1781 Type 2x6 HD 8575 HD 1673 GE 85B 5886 GE 85B 5887 GE 854 5885 GA 85B 6154 GA 85D 5897 GE 85D 5890 GE 85D 5558 GE 85D 5891 LCBAA3021A GE 85D 6076 GE 85D 6067 GE 21D 5728 GE 79D 0113 Type JA C 030 21739 C080A20 G0310 GE 84D 5894 GA 85C 6 156 GE 85D 6079 GE 85D 4580 OK 16 210 5911 21 5725 190 4815 810 1847 5 437 5 GE 79D 0118 L 10m m TT 3x10 TT 3x8 TT 3x6 BM 3x6 GE 79D 0541 PM 4x8 PM 3x12 PM 3x6 OTW 4m m ITW 3m m N 4m m GE 23D 7587 BM 3x10 BM 3x6 OTW 3m m SEMICONDUCTOR LEAD IDENTIFICATION AND IC CIRCUIT DIAGRAM INTEGRATED CIRCUIT LEAD IDENTIFICATION 504 2 10402 LOCAL IN RF IN X TAL OSC GND MIXER OUT AUDIO MUTE Vec SCAN CONTROL SQUELCH TRIGGER LIMITE
9. CH2 and 54 MHz CH3 Step 3 Select Channel 2 40 MHz and adjust T3 and T6 as shown below RF waveform Step 4 Check Channels 1 through 3 for the below RF waveform A slight deviation as shown below is acceptable RESPONSE dB FREQIMHz AIRCRAFT BAND Step 1 Connect instruments Same connection as VHF Lo band except Sweep Generator frequency change to 108 MHz to 174 MHz Step 2 Program 108 MHz CH1 127 MHz CH2 136 MHz CH3 Step 3 Select Channel 2 127 MHz and adjust T1 and T4 for maximum RF waveform Step4 Check Channels 1 through 3 for maximum RF waveform Slight deviation as shown below is acceptable NOTE Perform AIRCRAFT BAND RF AMP ALIGNMENT before VHF HI BAND If this procedure is not followed alignment may be impossible and or inaccurate RESPONSE dB 108 127 136 FREQ MHz 10 VHF HI BAND 138 MHz CH1 154 MHz CH2 174 MHz CH3 Connect instruments Same connection as VHF Lo band except Sweep Generator frequency Step 1 change to 138 MHz to 174 MHz Step 2 Program 138 MHz CH1 154 MHz CH2 174 MHz Step 3 Select Channel 2 154 MHz and adjust T2 and T5 for maximum RF waveform Step 4 Check Channels 1 through 3 for maximum RF waveform Slight deviation as shown below is acceptable 2 2 c FREQIMHz UHF BAND Step 1 Connect instruments as shown below ANT JACK Step 2 Program 380 MHz CH1 450 MHz CH2 and 512 MHz CH3 Step 3 Select Channel
10. MX 6046 MX 5514 MX 4014 MX 5546 MX 6439 152076 152076 152076 152076 HZ12C2L 152076 H216 3L 152076 HZ7B2L 152076 152076 HZ12C2L 5277B 1B4B41 152076 152076 152076 152076 152076 152076 152076 152076 152076 152076 152076 152076 152076 152076 152076 MB504P G TK10420 TC4066BP TA78006AP uPD4069UBC TC4069UBP uPC324C LA6324 MC145158 uPD4094BC TDA1905 S 81250HG GRE 0437A uPD446G 20 TC5517CF 20 COILS amp TRANSFORMERS RFC Low CA 3488 4LNCO92 RFC Aircraft Hi CA 3942 4LNC122 RFC Low CA 3488 4LNCO92 Coil RF UHF CA 4654 8LNRO93 RFC Aircraft Hi CA 3942 4LNC122 Coil RF UHF CA 4654 8LNRO93 Coil Choke 0 22uH LALO3VSR22M Coil RF UHF CA 4654 8LN R093 Coil Choke 104H CB 2076 LALO3VS100K Coil Choke 10 2076 LALO3VS100K Coil Choke 10uH CB 2076 LALO3VS100K Coil Choke 10yH CB 2076 LALO3VS100K Coil Choke 10uH CB 2076 LALO3VS100K Coil Choke 3 94H LALO3VS3R9K Not used Coil Choke 10uH CB 2076 LALO3VS100K Not used Coil Choke 3B 037 Coil RF Aircraft CA 9876 GR N783 Coil RF Hi CA 9880 GR N784 Coil RF Low CA 2092 GR N5341 Coil RF Aircraft CA 9876 GR N783 Coil RF Hi CA 9880 GR N784 Coil Low CA 2092 GR N5341 Coil Low GR N790 Coil Aircraft Hi UHF CA 9890 GR C787 Coil 10 7MHz CA 7246 GR A470033 Coil 455kHz CA 9499 GR P4203 Coil 455kH7i CA
11. 15k ohm 1 4W 5 R25XELO3J153 R36 Carbon film 2 2k ohm L4W 56 R25XELO3J222 R37 Carbon film 220 ohm 1 4W 5 R25XELO3J221 R38 Carbon film 3 3k ohm 1 4W 35 R25XELO3J332 R39 Carbon film 100 ohm 1 4W 45 R25XELO03J101 R40 Carbon fiim 100k ohm 1 4W 5 R25XEL03J104 R41 Carbon film 100 ohm 1 4W 15 R25XEL03J101 R42 Carbon film 100 ohm 1 4W 5 R25XEL03J101 R43 Carbon film 10k ohm 1 4W 5 R25XEL03J103 R44 Carbon film 22k ohm 1 4W 5 R25XELO3J223 R45 Carbon film 15k ohm 1 4W 55 R25XELO3J153 R46 Carbon film 1k ohm 1 4W 3 5 R25XEL03J102 R47 Carbon film 220 ohm 1 4W 5 R25XEL03J221 R48 Carbon film 220 ohm 1 4W 5 25 103 221 R49 Carbon film 470k ohm 1 4W 45 R25XELO03J474 R50 Carbon film 47k ohm 1 4W 5 R25XEL03J473 R51 Carbon film 100 ohm 1 4W 5 R25XEL03J101 R52 Carbon film ohm 1 4W 5 R25XEL03J102 R53 Carbon film 2 2k ohm 1 4W 5 R25XEL03J222 R54 Carbon film 22 ohm 1 4W 5 R25XEL03J220 R55 Carbon film 1k ohm 1 4W 5 R25XEL03J102 R56 Carbon film 100 ohm 1 4W 5 R25XEL03J101 R57 Carbon film 220k ohm 1 4W 59 R25XEL03J224 R58 Carbon film 5 6k ohm 1 4W 5 R25XEL03J562 R59 Carbon film 1k ohm 1 4W 25 R25XEL03J102 R60 Carbon film 2 2k ohm 1 4W 5595 R25XELO03J222 R61 Carbon film 2 2k ohm 1 4W 5 R25XEL03J222 R62 Carbon film 47 ohm 1 4W 5 R25XEL03J470 R63 Carbon film 100k ohm 1 4W 5 R25XEL03J104 R64 Carbon film 27k ohm 1 4W 5 R25XEL03J273 R65 Carbon film 2 2k ohm 1 4W 3 5 R25XEL03J222 R66 Carbon film 4 7k ohm 1 4W 5 R
12. 8183 GR P352203 Coil 455k Hz CA 7844 GR P4202 Coil Converter 7PSO 244 Transformer Power 21739 Inverter Transformer N19 5N75TK TRANSISTORS 3SK96 Mas 3SK 96 3SK96 25 2458 NPN 25 2458 25 2458 3SK101 Y Mos 3SK 101Y 3SK101 Y 25 2464 NPN 25 2464 25 2464 25 2466 25 2466 25 2466 25C2668 0 Y NPN 2SC 26680 Y 2SC2668 O Y 2SC2668 O Y NPN 2SC 26680 Y 2SC2668 O Y 25 2347 NPN 25 2347 25 2347 25 2498 25 2498 25 2498 RN2202 UN4111 PNP w Resistor MX 4016 RN2202 UN4111 RN2202 UNA4111 PNP w Resistor MX 4016 RN2202 UN4111 RN2202 UN4111 PNP w Resistor MX 4016 RN2202 UN4111 26 Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon fiim Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Description RN2202 UN4111 PNP w Resistor 2SC2668 O Y NPN 25 2458 NPN 2SC2458 Y NPN 28C2458 GR NPN RN2202 UN4111 PNP wi Resistor 2SC2458 GR NPN 28C2458 GR NPN 2SC2458 GR NPN 2SA1150 Y PNP 25 2458 NPN 2SK118 0 Y 2SC2458 GR NPN 2SC2458 GR NPN 2SA1150 Y PNP 2SC2458 GR NPN 28C2458 GR NPN 25 945 NPN RESISTORS 220 ohm 220 ohm 10k ohm 47k
13. B 3SK101 Y gt GATE 1 SOURCE DRAIN GATE 2 gt 25 2464 25 2466 1 2 BASE 3 COLLECTOR 4 BASE 39 C 2SK118 v c OD CD G 25 2498 2 EMITTER 3 COLLECTOR D 2SA11501Y 25 2458 GR 28C2668 0 Y RN2202 p 3 1 EMITTER 2 COLLECTOR 3 BASE H UN4111 9 o i BASE 2 COLLECTOR 3 EMITTER DIODE IDENTIFICATION AND LEAD POLARITY 15585 Silicon Cathode Anode 2nd Band Black 1st Band Green 15 89 Varactor Cathode Anode 2nd 3rd Band Light Blue 1st Band Black C 1SV136A Silicon Cathode Anode Cathode Band Black D 1SV145B Silicon Cathode Anode Cathode Band Black E BB329 Body White Silicon Cathode Anode Cathode Band Black F 1K261 Germanium Cathode Anode 2nd Band Red 1st Band Red 40 G HZ2B2LL HZ4BLL Zener Body Green Cathode Anode Type No Cathode Band Navy Blue H HZ7B2L HZ12C2L HZ163L Zener Body Orange Cathode Band Navy Blue 552778 Silicon Body Black Cathode Anode Cathode Band White J 152076 Silicon Cathode Anode Cathode Band Navy Blue K 184841 1 2 3 4 1 1 41 VU N MICROPROCESSOR IC Band select keyboard Band select keybo
14. PRODUCT SAFETY NOTICE Many electrical and mechanical parts in this chassis have special characteristics These character istics often pass unnoticed and the protection afforded by them cannot necessarily be obtained by using replacement components rated for higher voltage wattage etc Replacement parts that have these special safety characteristics are identified in this manual and its supplements electrical components having such features are identified by A in the schematic diagram and the parts list Before replacing any of these components read the parts list in this manual carefully The use of substitute replacement parts that do not have the same safety characteristics as specified in the parts list may create shock fire or other hazards Description Freguency Coverage VHF LOW or MID AIRCRAFT VHF HIGH UHF Sensitivity 20 dB S N FM 3 kHz DEV at 1 kHz AM 60 MOD at 1 kHz VHF LOW or MID FM AIRCRAFT AM VHF HIGH FM UHF FM Selectivity 6 dB 50 dB Spurious Rejection at 40 MHz or 78 MHz at 120 MHz at 154 MHz at 450 MHz except primary image IF Rejection 10 7 MHz at 154 MHz Modulation Acceptance EIA RS 204 A Signal to Noise Ratio VHF LOW or MID AIRCRAFT VHF HIGH UHF Residual Noise Vol Min Scanning Rate Fast Slow Search Rate Fast Slow Priority Sampling Scan Delay Time Audio Output Power T H D 10 Channels of Operation Channel Freguency and Mode Disp
15. Squeich Input Serial Date out Serial clock Hold Input LCD control Key tone Mute out Memory Data 1 0 Memory output enable Keyboard Keyboard Keyboard Keyboard Band select keyboard APPENDIX VHF MID Band Alignment for European Australian models CIRCUIT REVISION 1 The following parts should be changed Low band Mid band Low band Mid band Not used 18pF Not used 56 pF BB329 Not used Not used BB329 Not used 4LN 092 GR N5341 GR N791 GR N5341 GR N791 Not used 47k9 0 0014 F 56pF 21739 21882 0 0014 F b6pF 0 0014 F 100pF 56pF 22pF 22pF 10pF 2 045 changed to C11 Pin 66 from IC11 Pin 65 3 R112 changed to 8 Pin 5 from 8 Pin 4 vco ALIGNMENT Step 1 Step 2 Step 3 Step 4 Step 5 Connect DC SSVM to TP5 and ground Program CH1 2 and 3 as follows CH1 68 MHz CH2 78 MHz CH3 88 MHz Select channel 3 88 MHz and adjust TC3 for 11 0V on the DC SSVM Select channel 1 68 MHz and adjust T7 for 1 5V on the DC SSVM Repeat steps 3 and 4 until no improvement is observed The DC SSVM should show as below 68 MHz Voltage of TP5 1 5V 78 MHz Voltage of TP5 4 7V 88 MHz Voltage of TP5 11 0V RF AMP ALIGNMENT Step 1 Step 2 Step 3 Step 4 Connect instruments as shown below ANT JACK SCOPE TP1 UNIT UNDER TEST o 1 m SWEEP MM gt i 68MHz 88MHz gt 7
16. 03J103 R25XEL03J103 R25XEL03J101 R25XEL03J1RO R25XEL03J223 R25XEL03J333 R25XEL03J221 R25XELO3J561 R5OXELRJ3R3 Carbon film Solid film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon fiim Carbon fiim Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Description 470 ohm 1 8M ohm 47k ohm 39k ohm 47k ohm 47k ohm 47k ohm 47k ohm 4 7k ohm 10k ohm 10k ohm 33k ohm 10k ohm 1 5M ohm 470k ohm 10k ohm 10k ohm 10k ohm 330k ohm 18k ohm 47k ohm 100k ohm 2 2k ohm 2 2k ohm 2 2k ohm 1k ohm 1k ohm ik ohm 1k ohm 1k ohm 1k ohm 1k ohm 1k ohm 4 7k ohm 560k ohm 10 ohm 6 8k ohm 150 ohm 100k ohm 2 2k ohm 56 ohm 22 ohm 220k ohm 47k ohm 47k ohm 1 4W 1 2W 1 4W 1 4W 1 4W 1 4W 1 4W 1 4W 1 4W 1 4W 1 4W 1 4W 1 4W 1 4W 1 4W 1 4W 1 4W 1 4W 1 4W 1 4W 1 4W 1 4W 1 4W 1 4W 1 4W 1 4W 1 4W 1 4W 1 4W 1 4W 1 4W 1 4W 1 4W 1 4W 1 4W 1 4W 1 4W 1 4W 1 4W 1 4W 1 4W 1 4W 1 4W 1 4W 5 10 5 5 5 5 5 5 5 5 5
17. 0uF 10WV 20 10MV221HA Ceramic 0 001 10 DD104B102K50 Mylar 0 01 uF 5OWV 210 AK1 UU103K My lar O 1uF 50WV 210 AK1 UU104K Ceramic 470pF 50WV 10 DD104B471K50 Electrolytic 1 20 50MV010HA Electrolytic 10uF 16WV 20 16MV100HA Ceramic 0 01VL 50VV 80 20 DD106F 103250 Electrolytic 1uF 20 50MV010HA Electrolytic 10uF 16WV 20 16MV100HA Electrolytic 47uF 16WV 20 16MV470HA Mylar 0 01uF 10 AK1 UU103K Tantalum 0 47uF 35WV 10 DN1VR47K1S Electrolytic 50WV 20 50MV010HA Mylar 0 033 210 AK1 UU333K Mylar 0 047 uF 50WV 10 AK1 UU473K Electrolytic 47 uF 16WV 20 16MV470HA Not used Electrolytic 0 47 uF 50WV 20 50MR47HA Electrolytic O 1uF 50WV 20 50MVOR1HA Ceramic 0 001uF 10 DD104B102K50 Myiar 0 022uF 50WV 310 AK1 UU223K Ceramic 33pF 50WV 5 DD105CH330J50 Ceramic 56pF 5 DD106CH560J50 22 Ceramic 0 1VC 20 SR295C104M Ceramic 220pF 10 DD104B221K50 Ceramic 22pF 5 DD104SL220J50 Ceramic 0 0047uF 10 DD108B472K50 Ceramic 220pF 10 DD104B221K50 Ceramic 220pF 10 DD104B221K50 Tantalum 1uF 10 15 Tantalum 0 33uF 10 DN1VR33K1S Electrolytic 4 7uF 20 25MV4R7HA My lar 0 01uF 10 AK1 UU103K Electrolytic 1uF 20 470pF 10 DD104B471K50 Mylar 0 01uF 10 AK1 UU103K Mylar 0 0015 F 10 AK1 UU152K Mylar 0 033uF 10 AK1 UU333K Electrolytic 10uF 20 16MV100HA Mylar 0 0033
18. 1 380 MHz and adjust TC1 and TC2 as shown below Step 4 Check Channels 1 3 for the below RF waveform at each frequency marker A slight deviation as shown below is acceptable V 380 450 512 FREO MHz RESPONSE dB 11 ZEROMATIC FUNCTION AND HOW TO CHECK IT ICS 2 6 1C6 1 4 Diseriminator curve Zeromatic functions when OUTPUT is H level ee ee lt s ece S ves To adjust e voltage receive signal in Manual mode and set T10 to obtain 2 8V 1 2 at TP 3 It is convenient to use the National Weather Service Signal for the adjustment the event Zeromatic does not function correctly refer to REFERENCE FREQUENCY OSC ALIGN MENT and check 50 700 MHz 20 Hz and adjust T10 again at 2 8V DC while a Signal is being received 12 KEYS ACCESS PULSE OUTPUT IC11 P30 7 P31 1 2 L me 1 l 200 5 4 ey I 400 j 1 51 NOTE Usea at Pin 66 of IC11 as trigger and then observe the keys access pulse when IPROGRAM key is pressed PLL DATA WAVEFORM IC11 3288 32 8us l 1221 46us 1 1 265 DATA 3 PIN68 N 78 je 78805 Shift Register Strobe n d F o 55 PLL Latch Pulse PIN56 1f1n 5 8 78us NOTE Enter 150 000 MHz to cha
19. 10 AK1 UU332K Mylar 0 022uF 10 AK1 UU223K Ceramic 0 001 10 DD104B102K50 Electrolytic O 1uF 20 Electrolytic 10uF 20 16MV100HA Electrolytic 10uF 20 16MV100HA Electrolytic 47uF 2209 16MV470HA Mylar 0 22uF 10 AK1 UU224K Electrolytic 2200uF 20 16MV222HA Electrolytic 100uF 20 16MV101HA Electrolytic 10uF 20 16MV100HA Tantalum 0 47uF 2105 DN1VR47K1S Mylar 0 001vF 10 AK1 UU102K Electrolytic 47 uF 20 16MV470HA Tantalum O 1uF 1096 DN1VOR1K1S Tantalum O 1uF 10 DN1VOR1K1S Electrolytic 1000F 20 25MV102HA Ceramic O 01uF x2 80 20 EXR FS2032S Ceramic 0 01pFx2 80 20 EXR FS203ZS Not used Not used Ceramic 0 01 80 20 DD106F 103250 Ceramic 0 01 80 20 DD106F 103250 Electrolytic 20 0 001vF 10 DD104B102K50 Electrolytic 10uF 20 16MV100HA Ceramic 33pF 5 DD104SL330J50 Ceramic 33pF 5 DD 105CH330J50 Ceramic 22pF 5 DD104CH220J50 Electrolytic 20 0 01 L 805 20 jo DD106F 103250 Ceramic 0 01uF 80 20 DD106F 103250 Ceramic 0 01uF 80 20 DD106F 103250 Ceramic 0 01 80 20 DD106F 103250 Ceramic 47pF 5 DD104SL470J50 Tantalum 6 8uF 10 DN1A6R8K1S Mylar 0 047 uF 10 AK1 UU473K Ceramic O O1uF 80 20 DD 106F 103250 Ceramic O 01uF 80 20 DD106F103Z50 Ceramic 220 pF 10 DD104B221K50 Electrolytic 100 2205 16MV101HA Ceramic 0 01pF 80 20 DD106F 103250 Ceramic 0 01uF
20. 15 Accessory Bag for Bracket Mounting HW2000143M GE 17D 3738 Wire Kit 532 A Hardware Kit 20001 13 532 B Connector Pin 2 Pin Male 011 02 Connector Pin 3 Pin Male P1 011 03M Connector Pin 12 Pin Male 011 12 Switch Push Reset SKHHLA Jack Tape Out JPJO573 01 010 Jack Ext SPKR G8036 Jack Ext PWR HEC0470 01 630 Jumper Short ERD 25TC0B TP1 TP5 Jumper Short ERD 25TCO Antenna Telescopic 1170 Plate CPU Shield Bottom GE 85D 6073 Piate RF Shield GE 85D 6075 Plate PLL Shield Bottom GE 85D 6074 31 OOOO DISASSEMBLY EXPLODED VIEW Remove two screws and detach the Bracket 23 Remove four screws Remove two screws and two washers Detach the top and bottom cabinet Use care not to damage speaker leads connected to the top cabinet MECHANICAL PARTS LIST Cabinet TOP Cabinet BOTTOM Chassis PCB Assembiy Main Escutcheon Front Assembly Non Repairable Front Escutcheon Holder Keyboard Window LCD LCD Holder LCD Electro Luminescence Box Battery Cover Battery Compartment Snap Battery 200 m m Jack Antenna Transformer Power Speaker 2W 8 ohm Rubber Keyboard PCB Assembly Keyboard Spacer Speaker Holder Speaker Foot Spacer Bonnet Bracket Mounting Spacer Mounting Bracket Knob Volume Sguelch Bushing Antenna Guide Antenna Plate Lug L 10m m Screw 3x10 Trusshead Tapping Screw
21. 25XEL03J472 R67 Carbon film 1M ohm 1 4W 5 R25XEL03J105 R68 Carbon film 2 2k ohm 1 4W 5 R25XEL03J222 R69 Carbon film 10k ohm 1 4W 596 R25XEL03J103 R70 Carbon film 1k ohm 1 4W 5 R25XEL03J102 R71 Carbon film 1 5k ohm 1 4W 5 R25XELO3J152 R72 Carbon film 1 5k ohm 1 4W 45 R25XEL03J152 R73 Carbon film 47k ohm 1 4W 5 R25XEL03J473 R74 Carbon film 22k ohm 1 4W 5 R25XEL03J223 R75 Carbon film 10k ohm 1 4W 5 R25XEL03J103 R76 Carbon film 100k ohm 1 4W 59 R25XEL03J104 R77 Carbon fitm 100k ohm 14W 35 R25XEL03J104 R78 Carbon film 47k ohm 1 4W 15 R25XEL03J473 R79 Carbon film 100k ohm 1 4W 5 R25XEL03J104 R80 Carbon film 3 3k ohm 1 4W 5 R25XEL03J332 R81 Carbon film 220k ohm 1 4W 5 R25X EL03J224 R82 Carbon film 5 6k ohm 1 4 5 R25XELO3J562 R83 Carbon film 470 ohm 1 4W 5 R25XEL03J471 R84 Carbon film 1k ohm 1 4W 5 R25XEL03J102 R85 Carbon film 100 ohm 1 4W 5 R25XEL03J101 Carbon film Carbon film Carbon film Carbon Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Not used Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon Carbon film Carbon film Carbon film Carbon f
22. 80 20 DD 106F 103250 CAPACITOR ARRAY Description RS Part Number MFR s Part Number Array Capacitor 100pFx8 50WV EXF P8101MW CRYSTALS amp FILTERS Crystal 10 245 MHz MX 1281 T5717 H5717 Crystal 6 400 MHz MX 1247 6 400 MHz Crysta 32 768 kHz MX 1039 32 768 kHz Filter Crystal 10 7 MHz C 1149 T5718 H5718 Fitter Ceramic 455 kHz C 1044 CFW455D 1SS85 Silicon DX 1462 1SS85 Varactor 1SV136A Silicon DX 2504 1SV136A 1SS85 Silicon DX 1462 1SS85 1SS85 Silicon DX 1462 1SS85 Varactor BB329 Silicon DX 1739 BB329 1SS85 Silicon DX 1462 1SS85 Varactor 1SV136A Silicon DX 2504 1SV136A 15585 Silicon DX 1462 15585 15585 Silicon DX 1462 15585 Varactor BB329 Silicon DX 1739 BB329 Varactor 1SV145B Silicon DX 2512 1SV145B Varactor 1SV145B Silicon DX 2512 1SV145B Varactor 152076 Silicon DX 1056 152076 Varactor BB329 Silicon DX 1739 BB329 Varactor BB329 Silicon DX 1739 BB329 Varactor 1SV145B Silicon DX 2512 1SV145B Varactor 1SV145B Silicon DX 2512 1SV145B 152076 Silicon DX 1056 152076 152076 Silicon DX 1056 152076 152076 Silicon DX 1056 152076 152076 Silicon DX 1056 152076 152076 Silicon DX 1056 152076 1K261 Germanium DX 1325 1K261 1K261 Germanium DX 1325 1K261 1K261 Germanium DX 1325 1K261 HZ4BLL Silicon DX 2673 HZ4BLL 152076 Silicon DX 1056 152076 152076 Silicon DX 1056 1S2076A 152076 5 DX 1056 152076A 24
23. 962 644 4 027 251 4 092 594 4 123 715 4 245 348 MS 2000113 CUSTOM MANUFACTURED FOR RADIO SHACK A Division of Tandy Corporation U S A FORT WORTH TEXAS 76102 CANADA BARRIE ONTARIO L4M 4W5 TANDY CORPORATION BELGIUM FRANCE U K Centre Commercial des 3 Fontaines Rue des Pieds d Alouette 39 B P 147 Bilston Road Wednesbury 5140 Naninne Namur 95022 Cergy Pontoise Cedex West Midlands WS10 7JN Mount Druitt N S W 2770 5A6 Printed in Japan
24. CPU malfunctions such as wrong data processing wrong data transfer etc To overcome this C149 and R146 initialize the CPU Initialization is done when RESET switch is pushed Figure A shows initializing waveform The CPU contains two clocks One produces the waveform shown in Fig B at Pins 49 and 50 which is used for program functioning The other waveform which appears at Pins 3 and 4 is derived from X 3 32 768 kHz which is used to determine Delay time LCD display etc Shown in Fig C IC7 is the PLL frequency synthesizer The VCO output is 1 64 or 1 65 divided by Pre scaler The output of Pin 15 and 16 of IC7 is applied to the VCO control via the Low Pass Filter 022 23 24 5V 1 5V Figure A Figure B Figure C GENERAL OPERATION OUTLINE Turn POWER SW ON Automatically set to SCAN mode and starts scanning when the SO is on Press MANUAL When MANUAL is pressed again the channei advances To select one of 1 200 channels push the number key and then push MANUAL Key in search freguency as follows Press LIMIT and key in lower frequency with numeral keys When battery voitage drops LOW BATT indicates and beep tone trom speaker sounds Press LIME upper frequency and key in Press Press to search from lower frequency Press Y to search trom upper fre quency Squelch must be MON to store the desired frequency 10 monitor channel
25. ER PROGRAM MEMORY 4096 8 5 SYSTEM CLOCK GENERATOR CL STANOBY CONTROL P410 P400 X20 XIO VLC3O VLC2O COM3O COM2O COMIO COMOO S310 S300 S290 280 270 5260 5250 5240 5230 5220 5210 NCO 200 LCDCL DECODER LCD CL MAR 18 INSTRUCTION O PO00 1NTO 01 5 02 50 OPO03 SI O P30 OP3 NC oo BO 79 78 77 76 73 74 73 T2 7 706968 6766 63 OP50 5 O P52 OP53 OP60 OP6I O P62 63 O DO 400 Qn GRE 0437A Ovss OP32 OP33 OPI _ _ C 20 6518 OP21 PTOUT OP22 2 OP73 OCL2 ORESET O INT 50 05 052 C53 ONC 654 SCK POI SI PO3 INTI INTO POO 2 INTERRUPT SERIAL N CONTROL INTERFACE 8 STACK POINTER 8 DATA MEMORY 256x4 BITS LCD CONTROLLER DRIVER RESET Vss Vici 3 COMO 3 50 3 28 LI LE o 1L 1 IL 1 PORTO BUFFER PORT BUFFER PORT2 LATCH BUFFER PORT3 LATCH BUFFER PORT4 LATCH BUFFER PORT 6 LATCH BUFFER PORT LATCH BUFFER 8 95 1 1 1 U U 1 P20 P22 PSTB P20 PTOUT P2I P30 P33 P40 P43 50 53 P60 P63 P70 P73 TRANSISTOR LEAD IDENTIFICATION A 35 96 GATE 1 GATE 2 DRAIN SOURCE PWR E 25 2347 oS No 1 EMITTER 2 COLLECTOR 3 BASE
26. PS WIRING DIAGRAM NH8 OIA 9 nig 9 11 ANOS 96 98001 LHM 3180 3AP 1346 WAE 6 980 9713145 NY9 G Nd 2 T A9 0342 18 2 1315 I 0 01 14 NUO 0000000000001 8244 QHVOBA3 WWF 21110168 9 lt 2 3 a 18A 1081405 213005 4831198 dVNS 4831198 0131 5 MS 28U 109I1M0 3Wn7OA a 2 1 xd o NM SAA 1185 3329395 3JON3ISININNI 0812373 UINUOISNVUL 3MOd m9 N 19 20 ELECTRICAL PARTS LIST PRODUCT SAFETY NOTE Products marked witha have special characteristics important to safety Before replacing any of these components read carefully the product safety notice of this service manua Don t degrade the safety of the product through improper servicing CAPACITORS Ceramic 0 01 uF 80 20 DD106F 103250 Ceramic 0 01 uF 80 20 0010621032750 Ceramic 0 001uF 10 DD104B102K50 Ceramic 1pF 0 25pF DD104SL010C50 Ceramic 0 01 uF 80 20 DD106F 103250 Ceramic 0 0014F 10 DD104B102K50 Ceramic 0 014F 80 20 DD106F103250 Ceramic 0 0014F 10 DD104B102K50 Ceramic 330pF 10 DD104B331K50 Ceramic 0 01 80 20 DD106F 103250 Ceramic 0 0014F 10 DD104B102K50 Ceramic 22pF 5 DD104SL220J50 Ceramic 0 001 uF 10 DD104B102K50 Ceramic 0 001vF 10 DD104B102K50 Ceramic 0 0014F
27. R IM SQUELCH IN MTH MSTERESS DE COUPLING FILTER OUT LIMITER OUT FILTER IN QUAD IN DETECTOR OUT TC4066BP 12 CONTROLS IN OUT OUT IN CONTROL 34 1 4 78006 1 INPUT 2 OUTPUT 3 GND uPD4069UBP AI YI A2 Y2 Vs C6 324 INPUTS 35 IC7 MC145158 MC 145158 14 8IT SHIFT REGISTER hn ENABLE 15 sv 14 REF OSC IN out OSC OUT REF OUT Modulus Control Enable Data Clock LATCH 12 MODULUS CONTROL N CLOCK VDO PING VSS PING uPD4094B 8 5 SHIFT REGISTER nt SERIAL sTRoBE LI 05 OUTPUTS 2 crock 3 LATCH 0255 031 6 o 7 3 STATE BUFFER vss 8 01 02 0304 05 Q6 07 88 PARALLEL OUTPUTS 1 9 TDA190 5 GND R3 e ee ee 02 EN 51 THRESHOLD 4 GND MUTING 5 GND RI LET ERS INVERT IN 6 03 97 SVR io EE T iy n 36 10 S 81250HG 1 12 uPD446G 6 5 4 2 Al AQ 1 01 1 02 1 03 GND wo 9 Alo A4 _ VCC M 8 GND AT MEMORY gt CELL ARRAY A8 x eo 1 01 m OUTPUT SENSE SWITCH COLUM DECODER ADDRESS BUFFER 1 02 37 1 11 GRE 0437A COUNT CLOCK x2 GENERATOR PROGRAM COUNTER I2 cL CLOCK TIMER EVEN CONTROL COUNT
28. RESISTANCE VALL 2 CAPACITANCE vas 3 TAXTALUMM 4 5 101 MYL R NO SUFFIXED i 6 DENOTES DG CONDITIONS CHL SGUELCH CCW MI67 2 2X jme 35 2552VV Cb A ozs gae ate 9 2 029 29 R57 R55 1 5M 25524584681 MX CAUTION SINCE THE COMPONN DESCRISED ON PART p 44 SCHEMATIC DIAGRAM d RES ca REF mA CT s amp af 1 47X 22x mne 4TOP mao A 7 11 4 GR N783 72 3 704 13 6 oR ascen 3 2 na d 3 gt m mue 42 gt TAD i RI s 8 220 84 AK i Md jalo 8 5 SEE FREI 924 sl 215 115 22 2 1 C70 0 001 8 g LI 000 L l ar Reg aa Q x R58 54 x T jo ao Qo Ser Sox eio 8 x 1 15 n L CF HIN IINA 4 67 J 962 1 13 1C40668P PIN 00 13 PIN 14 to UNAII s PAIK 2J TC406308P PIN NOT Gr vto PIN NO 14 s pense 16124 vas PAN NO II PIN NO 4 V50 10 14 7800 CC ROC 04750 am 1 Rite 034 22 2 E em 29x ol
29. Sweep Generator with variable marker 30 54 MHz 108 174 MHz NOTE 1 Use non metallic tuning tools The test equipment and Receiver should be warmed up at least 30 minutes before proceeding with alignment Input signal from the Generator should be kept as low as possible and still obtain usable output NOTE 2 Three silver oxide batteries are required to hold the memory when main battery is disconnected Always be sure the unit is loaded with fresh batteries or the pre programmed channels will be lost will have to be re programmed NOTE 3 For servicing VHF Mid band of European Australian models see Appendix on page 43 IF SECTION ALIGNMENT Step 1 Connect instruments as shown below 15kHz TP1 UNIT 4 UNDER TEST 455kHz 3 8 42VP P 10 7 MHz o OIF SWEEP GENERATOR 15kHz INPUT 100uV Step 2 Adjust T10 for maximum output so that the 455 kHz marker is in the center of the discrimi nator curve and for best linearity as shown above During alignment maintain Sweep Generator output at the lowest level possible to prevent overloading VCO ALIGNMENT VHF LO BAND Step 1 Connect a DC SSVM to and ground Step 2 Program CH1 2 and 3 as follows CH1 30 MHz CH2 40 MHz CH3 54 MHz Step 3 Select Channel 3 54 MHz and adjust for 13V on the DC SSVM Step 4 Select Channel 1 30 MHz and adjust T7 for 1 0V on the DC SSVM Step 5 Repeat steps 3 and 4 until no improvement is observ
30. and or associated circuit components Replace the defective parts 2 Defective band switch circuit components Replace the defective parts Defective VCO circuit 08 D16 and or associated circuit components e Replace the defective parts 1 Defective PLL circuit IC1 7 and or associated circuit components Replace the defective parts 2 Defective 4 and or associated circuit components Replace the defective parts 1 Defective 021 1C 6 and or associated circuit components Replace the defective parts 2 Discriminator Coil T10 is out of adjustment e TP3 shall have 1 2 VCC approx 2 8V in normal receiving mode 3 15 50 700 MHz adjusted correctly Refer to page 9 REFERENCE FREQUENCY OSC ALIGNMENT 17 P C BOARDS TOP AND BOTTOM VIEWS TOP VIEW PAT is Bed we big SN Ea a Ri WO e UH 18 BOTTOM VIEW _ 8 a 5 v gu 9 83 ile C78 ceo DQ Tiis Fee indi oe Q 8 4 _ Te 2 58 O cwb C62 2 229 JA 04 S Lo 5 i90 C lt X ad ms 915 51 Ras 650 Leas vai 95 gt Hae pet 5 HB ke Qe ni A N gt gt o ys ub wet Og fon 624 gt jie E 2 1155 i 4 T
31. ard Count clock oscillator Count clock oscillator LCD bias LCD bias LCD bias LCD LCD LCD LCD LCD LCD LCD LCD LCD LCD LCD LCD LCD LCD LCD NC LCD LCD LCD LCD LCD LCD LCD P410 P400 XIO VLC3O VLC2O COM3O COM2O COM 1O COMOO 310 5300 290 280 270 5260 5250 5240 230 220 210 MCC 5200 42 43 50 80 79 DO UN 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 52 53 60 OP6I OP62 OP63 O POO INTO 01 5 OP02 50 O P03 St OP30 78 77 76 757473727 706968 6766 63 O GRE 0437A LCD LCD VDD LCD LCD LCD LCD LCD NC NC NC NC NC NC NC NC GND RESET System clock oscillator System clock oscillator OVss O P32 OP33 OPII OPi2 OPIS 20 5 8 OP21 PTOUT OP22 72 OPT3 OCL2 OCL ORESET OINTI Oso OSI OS2 os3 ONC 654 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 Key Lock Low Batt Band 80 Select Input Keyboard Keyboard Keyboard Shift register strobe PLL latch pulse out Memory write enable Memory Data 1 0 Memory Data 1 42 11 PORT FORMAT Memory Data 1 0 Memory Data 170 Band select keyboard Band select keyboard VSS Band select keyboard Band select keyboard
32. case should a unit perform to less than within any limit spec VHF MID range 68 88 MHz is for European and Australian Models only 28 BLOCK DIAGRAM CRYSTAL OSC MIXER IF AMP VHF RF AMP MIX 4 LOW AIR HI FILTER QUADRATURE DET 01 2 3 DI 10 57 XF 1 NOISE AMP VRI 1c 2 SOUELCH UHF RF AMP MIX Di Q4 5 AM FM SW DET amp ANL H 024 25 3 5 3 6 017 VCO LOW VR2 DI4 15 VOLUME f ZEROMATIC AUDIO HEADPHONE amp KEY TONE AMP 6 IC5 6 020 2 9 1 LV SPEAKER 1 TAPE OUT EL DRIVER s TIS 030 v arse lt lt 240V KEYBOARD LOW BATT PLL LOW PASS DC DC CONV LCD DET FILTER 025 26 CPU CONTROL 018 19 D26 VOLTAGE REGULATOR 1C 10 027 28 29 5 7 022 23 24 036 37 BACK UP BATT C O SWI RESET SW PRINCIPLES OF OPERATION The PRO 2021 is a PLL Phase Locked Loop Synthesized VHF UHF AM FM Receiver controlled by a CPU Central Processing Unit via the keyboard The VHF Low Band 30 54 MHz or Mid Band 68 88 MHz and High Band 138 174 MHz are received in 5 kHz increments Aircraft Band 108 136 MHz is set up for 25 kHz increments and the UHF Band 380 512 MHz for 12 5 kHz increments Receiving freguency range freguency determination scanning speed delay time etc are all functions controlled by the CPU The CPU is able to d
33. ed The DC SSVM should read as below 30 MHz Voltage at TP5 0 9 1 0V 40 MHz Voltage at TPB 4 1 4 5V 54 MHz Voltage at 12 5 13 1V REFERENCE FREQUENCY OSC ALIGNMENT Step 1 Connect Frequency Counter to Q7 Collector through a ceramic capacity 47 100 pF and ground Step 2 Select Channel 2 40 MHz and observe VCO Frequency Step 3 Adjust TC6 so that the frequency is 50 700 MHz 20 Hz Step 4 Repeat VHF LO BAND VCO ALIGNMENT AIRCRAFT HI BAND AND UHF BAND Step 1 Connect a DC SSVM to TP 5 and ground Step 2 Program CH1 2 and 3 9 as follows CH1 108 MHz CH2 380 MHz CH3 138 MHz CH4 120 MHz CH5 150 MHz CH6 450 MHz CH7 136 MHz CH8 174 MHz CH9 512 MHz Step 3 Select Channel 9 512 MHz and adjust TC4 for 13V on the DC SSVM Step 4 Select Channel 1 108 MHz and adjust T8 for 1 0V on the DC SSVM Step 5 Repeat steps and 4 until no improvement is observed The DC SSVM should read as below 108 MHz Voltage at TP5 0 9 1 1V 380 MHz Voltage at TP5 1 2 2 0V 138 MHz Voltage at TPS 1 8 2 5V 120MHz Voltage at TP5 2 2 3 0V 150 MHz Voltage at TP5 3 7 4 7V 450 MHz Voltage at TP5 5 5 6 6V 136 MHz Voltageat TP5 5 6 6 5V 174 MHz Voltage at TPS 9 8 11 0 512 MHz Voltage at TP5 12 5 13 1V RF AMP ALIGNMENT VHF LO BAND Step 1 Connect instruments as shown below ANT JACK SWEEP GENERATOR 30MHz S4MHz Step 2 Program 30 MHz CH1 40 MHz
34. ilm Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Description 330k ohm 5 6k ohm 100 ohm 10k ohm 8 2k ohm 10k ohm 100k ohm 10k ohm 10k ohm 22k ohm 4 7k ohm 10k ohm 47k ohm 47k ohm 22k ohm 100k ohm 22k ohm 22k ohm 4 7k ohm 6 8k ohm 3 3k ohm 2 2k ohm 47k ohm 10k ohm 10 ohm 10 ohm 10k ohm 4 7k ohm 2 2k ohm 560 ohm 4 7k ohm 4 7k ohm 560 ohm 22k ohm 100 ohm 10k ohm 6 8k ohm 220k ohm 22k ohm 150k ohm 2 2k ohm 10k ohm 1M ohm 47k ohm 100k ohm 1M ohm 22k ohm 10k ohm 10k ohm 100 ohm 1 ohm 22k ohm 33k ohm 220 ohm 560 ohm 3 3 ohm R143 changed to Fusible Resister RNF1 2S3R3J for Canadian model 29 RS Part Number MFR s Part Number 25 103 334 25 103 562 R25XEL03J101 R25XEL03J103 R25XEL03J822 R25XEL03J103 R25XEL03J104 R25XEL03J103 R25XEL03J103 R25XEL03J223 R25XELO3J472 R25XEL03J103 R25XEL03J473 R25XEL03J473 R25XEL03J223 R25XEL03J104 R25XELO3J223 R25XEL03J223 R25XEL03J472 R25XEL03J682 R25XEL03J332 R25XEL03J222 R25XEL03J473 R25XEL03J103 R25XEL03J100 R25XEL03J100 R25XELO3J103 R25XEL03J472 R25XEL03J222 R25XEL03J561 R25XEL03J472 R25XEL03J472 R25XEL03J561 R25XEL03J223 R25XEL03J101 R25XEL03J103 R25XEL03J682 R25XEL03J224 R25XEL03J223 R25XEL03J154 R25XEL03J222 R25XEL03J103 R25XEL03J105 R25XEL03J473 R25XEL03J104 R25XEL03J105 R25XEL03J223 R25XEL
35. itch OFF Does 5 0 3V exist at Pin 33 of 11 YES Power switch ON Is 150 000 displayed at CH1 YES Disconnect AC or DC plug and then connect after 2 hours Power switch ON Is 150 000 displayed at CH1 YES MEMORY circuit is OK NO NO NO MEMORY CHECK NOTE 1 NOTE 2 Defective Voltage Regulator IC 10 Defective CPU control circuit 018 019 and or IC 12 Defective Back up battery Prior to checking CPU System measure supply voltage to ICs See schematic drawing While checking the following items the ICs can latch up If so push RESET switch about one second and then continue 15 TROUBLESHOOTING 1 Display does not light and no 1 Faulty power cord sound when POWER is on Replace the power cord Volume Contro MAX 2 Defective power transformer Squelch Control Replace the power transformer Counterclockwise CCW 3 Defective power switch Replace the Volume control VR 2 4 Defective rectifier D43 Replace the D43 5 Defective voltage regulator circuit components Replace the defective parts 1 Defective speaker or headphone jack o Repiace the defective parts 2 Defective audio amplifier 9 and or associated circuit components Replace the defective parts 3 Defective IF amplifier 2 and or associated circuit components Repiace the defective par
36. lay Receiving System Power Source Tape Out Speaker Accessory SPECIFICATIONS Nominal spec 0 5 aV 2 0 uV 1 0 V 1 0 uV 9 kHz 15 kHz 50 dB 50 dB 50 dB 60 dB 8 kHz 45 dB 35 dB 45 dB 35 dB 3 mV 8 channels sec 4 channels sec 8 steps sec 4 steps sec 2 sec 2 sec 1 5W Limit spec 30 54 MHz 5 kHz steps 68 88 MHz 5 kHz steps 108 136 MHz 25 kHz steps 138 174 MHz 5 kHz steps 380 512 MHz 12 5 kHz steps 2uV 5uV 3 IV 4uV 12 kHz 18 kHz 40 dB 40 dB 40 dB Not specified 40 dB 5 kHz 30 dB 25 dB 30 dB 25 dB 5 mV 6 10 channels sec 5 channels sec 6 10 steps sec 3 5 steps sec 1 steps 1 sec 1 0W Any 200 channels in any band combination Liquid crystal display Direct Key entry Digital Frequency Controlled Synthesizer Superheterodyne 1st IF 10 7 MHz 2nd IF 455 kHz AC 120V 60 Hz 15W max DC 13 8V 8W Z 10 kohm 500 mV nominal 300 mV limit Built in 3 77mm 8 ohm Dynamic Speaker Telescopic antenna Approx 24 13 16 63cm Car mounting bracket with screws and DC cable Dimensions Approx 3 1 8 x 10 2 8 x 8 80 x 260 x 200 mm HWD Weight 4 4 Ibs 2 0 kg NOTE Nominal specs represent the design specs all units should be able to approximate these some will exceed and some may drop slightly below these specs Limit specs represent the absolute worst condition that still might be consid ered acceptable in no
37. nnel 1 and lock out other channels Observe the waveforms while scanning 13 RECEPTION CHECK Tabie 1 POWER ON Does DISPLAY work properly NO YES Does SQ function and scan when SQ is ON NO YES Does Key in work properly NO YES the Unit produci NOISE when Volume Control turned clockwise SQ counter lockwise NO Is reception OK when correct frequencies are entered NO YES Does Memory function work OK NO YES Backup battery OK Is CPU control circuit which consists of 018 019 D26 OK is memory power supply circuit which consists of IC 10 OK 010 013 COLLECTOR NOTE 1 5 5V v 0 gt 0V Is DC DC converter OK associated circuit OK Is Keyboard and or Is voltage Regulator ts1C11 and reset OK properly 15 Band select which consists of 8 010 Q13 OK Is IC 2 and or associated circuit OK Is PLL circuit which consists of IC1 7 OK Is Mute circuit 017 1C 3 OK Is Power Suppiy circuit OK Is Voltage Regulator OK Is IC11 clock oscillation waveform or reset OK Is CPU control circuit OK Is 1C11 OK Is IF Amp or Noise Amp circuit 1 2 OK i 9 15 VCO circuit OK Amp IC 9 Is 1C11 OK 14 POWER ON Enter program 150 000 in CH1 Power sw
38. o only the assigned functions and no modification of the CPU is feasible The following paragraphs explain the operation of the circuit in terms of the functional blocks varactor variable capacitance diode tuning Automatic Tuning System is employed on all Bands Field effect transistors FET are used in the RF MIX circuits of Low Mid High and Aircraft Bands to achieve optimum mix modulation and mutuai modulation characteristics Q14 amplifies the 10 7 MHz IF A 10 7 MHz monolithic Crystal Filter is incorporated for better selectivity 2 contains the Local Oscillator Mixer IF Amplifier Quadrature FM Detector Noise Amplifier and DC amplifier A Crystal Oscillator produces 10 245 MHz which mixed with 10 7 MHz resulting in 455 kHz IF A 455 kHz Ceramic filter is provided to increase selectivity The 455 kHz IF is amplified in the IF Amp stage and a Quadrature FM Detector detects it to an audio signal A portion of the 455 kHz Ceramic Filter output is picked up amplified and detected by the AM IF Amp which consists of Q15 and Q16 and is then applied to the next stage via the ANL circuit Detected output of and FM is applied to 9 9 amplifies audio signals and feeds them to the speaker The zeromatic circuit consists of 1C 5 and 6 and 020 21 and functions in the search mode IC 11 is the CPU The CPU does data processing calculation etc Any unstable supply voltage VDD to the CPU can produce
39. ohm 220 ohm 47k ohm 4 7k ohm 47k ohm 100k ohm 47k ohm 47k ohm 100k ohm 220 ohm 47 ohm 100k ohm 47k ohm 22 ohm 220 ohm 220 ohm 47k ohm 220 ohm 47k ohm 47k ohm 2 2k ohm 47k ohm 470 ohm 4 7k ohm 10k ohm 100 ohm RS Part Number MX 4016 25 26680 Y 25 2458 28C 2458Y 2SC 2458GR MX 4016 2SC 2458GR 2SC 2458GR 2SC 2458GR 2SA 1150Y 25 2458 25 1180 2SC 2458GR 2SC 2458GR 2SA 1150 Y 2SC 2458GR 2SC 2458GR 25 9450 MFR s Part Number RN2202 UN4111 28C2668 0 Y 2SC2458 Y 2SC2458 Y 2SC2458 GR RN2202 UN4111 2SC2458 GR 2SC2458 GR 2SC2458 GR 2SA1150 Y 2SC2458 Y 2SK118 O Y 2SC2458 GR 2SC2458 GR 2SA1150 Y 2SC2458 GR 2SC2458 GR 2SC945 OA R25XEL03J221 R25XEL03J221 R25XEL03J103 R25XEL03J473 R25XEL03J221 R25XEL03J473 R25XEL03J472 R25XEL03J473 R25XEL03J104 R25XEL03J473 R25XEL03J473 R25XEL03J104 R25XEL03J221 R25XEL03J470 R25XEL03J104 R25XEL03J473 R25XEL03J220 R25XEL03J221 R25XEL03J221 R25XEL03J473 R25XEL03J221 R25XEL03J473 R25XEL03J473 R25XEL03J222 R25XEL03J473 R25XEL03J471 R25XEL03J472 R25XEL03J103 R25XEL03J101 R86 Not used 28 R30 Carbon film 47k ohm 1 4W 25 R25XELO3J473 R31 Carbon film 1M ohm 1 4W 5 R25XEL03J105 R32 Carbon film 1k ohm 1 4W 45 R25XEL03J102 R33 Carbon film 47k ohm 1 4W 5 25 103 473 R34 Carbon film 22k ohm 1 4W 35 R25XELO3J223 R35 Carbon fiim
40. s in the search mode Press Program mode Press PROGRAM to set to Command the desired fre Quency in each channel as follows Key in the desired freguency with numeral Keys Press to memorize the frequency If wrong frequency out of the band is entered it dis plays Error Press Error to clear Press PROGRAM Advances to next channel Key in the freguency and press LENT repeat it to memorize frequencies one by one For priority operation set as follows First press PROGRAM and channel numeral keys Press SCAN to set to scan Channel 1 200 when squelch is on Use LOCK QUT to skip undesired channels Press SPEED to set high speed scan press again to revert to norma speed Press PRIORITY to start the priority function a PRIORI TY will appear on the display Press PRIORITY to clear priority ALIGNMENT ALIGNMENT AND TEST POINTS TP4 TP3 N E 0 v ALIGNMENT PREPARATION Test eguipment reguired 1 Oscilloscope 0 500 kHz 0 50 MHz 8 UHF Sweep Generator with variable marker 2 ACSSVM 380 512 MHz 3 DC SSVM 9 FM Signal Generator 4 Frequency Counter 200 MHz 30 54 MHz 108 174 MHz 380 512 MHz 5 8 ohm dummy load 10 AM Signal Generator 108 136 MHz 6 Slow Sweep Generator with variable marker 10 7 MHz 7 VHF
41. tive parts 2 IC 11 is running wild e Replace Reset Switch 3 Defective 11 and or associated circuit components Replace the defective parts Squeich control is not adjusted correctly e Adjust SOUELCH VR 1 clockwise 6 Scan does not operate but MANUAL selector operates 16 7 Display lights but PROGRAM does not operate 8 Low Mid band does not operate but Air High and UHF operates 9 Air band does not operate but Low High and UHF operate 10 High band does not operate but Low and UHF operate 11 UHF band does not operate but Air High and Low operate 12 Air Hiah and UHF band do not operate but Low operates 13 bands do not operate but display OK 14 Searches but does not halt on the correct freguency Cause Remedy Defective Keyboard or connector and or associated circuit components Replace the defective parts 1 Defective Low band RF Coils T 3 6 and or VCO circuit components e Replace the defective parts 2 Defective band switch circuit components Replace the defective parts Defective AM IF Amp Q15 16 and or associated circuit components Repiace the defective parts 1 Defective Air and High band RF Coils T1 2 4 5 and or associated circuit components Replace the defective parts 2 Defective band switch circuit components Replace the defective parts 1 Defective UHF band RF amplifier Q4 mixer Q5 multiplier
42. ts 4 Defective functional squelch control IC 3 IC 5 and or associated circuit components Replace the defective parts 2 Display lights but no sound Volume Control MAX Squelch Control CCW 1 1 11 is running wild Activate Reset Switch 2 Defective initiate control and or associated circuit components Replace the defective parts 3 Defective IC 4 and or associated circuit components Replace the defective parts 4 Defective DC DC converter circuit components Replace the defective parts 5 Defective LCD Replace 6 Defective CPU IC 11 and or associated circuit components Repiace the defective parts 7 Defective 018 19 D26 and or associated circuit components Replace the defective parts 8 Defective EL1 and or associated circuit components Replace the defective parts 3 Sound but display does not light Volume Control MAX Squelch Control CCW 1 Defective functional squelch control 5 017 and or associated circuit components Replace the defective parts 2 Defective 2 and or associated circuit components Replace the defective parts 3 Defective IC 4 and or associated circuit components Replace the defective parts 4 Does not scan and squelch does not operate 5 Does not scan but saueich operates 1 Defective 017 IC 5 and or associated circuit components Replace the defec

Realistic Welding System 20-113 User's Manual

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