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Realistic Car Satellite TV System 20-110 User's Manual

1. 1 Phase 913 Fig 1o 13 E UT D1 5 s 91 Amplifier Charge 9 8 DF 012 E Output 110 4 010 Detector D2 2 CHARGE PUMP IEEE AMPLIFIER E L 4 NM ae dk 010 Our u2 apo 7 05 12 6 D2 pu ge PHASE DETECTOR 4 4 45 E 15 15 Clock 26 b all 16 100 Toggle to 19 Flip MTTL 12 2 5 Fiop Trans 1204 lator jo Ea TTL 130 Recommended Circuitry 9 Es MTTL For ac coupled Inputs 2 3254 MTTL 2 100007 9804 Out Clock Input fout 9 7 Enable T iWon DER 1 1 ls JE 18 13 13 5 l 18 le 18 13 IN Early Decode 12 81 1 2 10 1411 12 13 1 Clock 1 Pin 16 8 14537 yo 22
2. SCANNING PROGRAMMER BOARD SCHEMATIC DIAGRAM 9 A SCANNING PROGRAMMER BOARD TOP VIEW BOTTOM VIEW qz a 8 3 H E 015 4 SERT e et ia Bcc 83770 E ly RA DE sal 2 D Eu Hind l 8 R 1K RIB RIB 1K gt ogai ms ES onan opis T8 els TE rer i 5 em o t MES ue ME E E 24 err 160 D17 N60 mies oro no Dig INGO 020 1160 12 87414551 655 WIRING DIAGRAM FEED THROUGH CAPACITOR PLATE CONNECTOR N CONNECTOR E 2 lt 5765 azz 5 5 5 1755 am mum E Naam
3. P C BOARD PARTS LIST Description RS Part Number Part Number CAPACITORS Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Electrolytic Mylar Ceramic Tantalum Ceramic Ceramic Electrolytic Ceramic Ceramic Ceramic Ceramic Mylar Tantalum Ceramic Ceramic Ceramic Mylar Ceramic Ceramic Ceramic Ceramic Ceramic 0 0014F 0 014 0 0014F 0 0014F 0 0014F 0 0024F 0 0014F 0 0047HF 100pF 0 00474F 0 0047 0 0014F 0 00474F 0 0024F 100pF 0 002KF 47pF 0 0014F 22pF 0 0047HF 0 0047 0 001 0 00474F 0 001 0 001 470 330pF 68pF 47uF 0 1uF 10pF 0 1uF 0 0014F 470pF 47uF 470pF 470pF 470pF 470pF O 1KF O 1KF 100pF 330pF 330pF 0 0014F 2pF 2pF 22pF 0 0014F 0 00474F 32096 80 20 20 20 20 20 20 80 20 10 80 20 80 20 20 80 20 20 10 20 10 20 5 80 20 80 20 20 80 20 20 20 10 10 10 50 10 10 0 5pF 20 20 10 50 10 10 10 10 10 10 20 10 5 5 10 0 5pF 0 5 5 20 80 20 SCP 60 MC 70 SCP 60 SCP 60 5 60 5 80 5 60 5 100 70 5 80
4. 2E A 4SfIC Service Manual 100 5 FM SCANNING MONITOR RECEIVER WITH PROGRAMMABLE MEMORY Catalog Number 20 110 CUSTOM MANUFACTURED FOR RADIO shack DIVISION OF TANDY CORPORATION 5 SPECIFICATIONS OUTLINE ALIGNMENT PREPARATION REFERENCE FREQUENCY OSC DIVIDER ALIGNMENT 6 ALIGNMENT AND TEST POINT POSITIONS 7 FREQUENCY CODE PROGRAMMING FOR ALIGNMENT PREPARATION 8 VOLTAGE CONTROLLED OSCILLATOR VCO ALIGNMENT VHF UHF LOCAL OSCILLATOR FREQUENCY CHECK LOCAL OSCILLATOR FREQUENCY CHECK 10 245 MHz E SECTION ALIGNMENT pe Sis x VHF LOW BAND RF AMP ALIGNMENT VHF HI BAND AMP ALIGNMENT UHF BAND RF AMP ALIGNMENT 5 LOW HIGH OVERALL ALIGNMENT AND SENSITIVITY MEASUREMENT 12 OPERATION OF PLL PROGRAMMER CIRCUIT 125713 OPERATION OF SCANNING PROGRAMMER CIRCUIT 14 CHANNEL COUNTER DISPLAY DRIVER TRUTH TABLES RE IEP ESBOARDITTOP VIEWJ BOARD BOTTOM VIEW 2 RF IF P C BOARD SCHEMATIC DIAGRAM MASTER INTER CONNECT DIAGRAM SCANNING PROGRAMMER P C BOARD SCHEMATIC DIAGRAM SCANNING PROGRAMMER P C BOARD TOP VIEW SCANNING PROGRAMMER P C BOARD BOTTOM VIEW WIRING DIAGRAM PLL PROGRAMMER P C BOARD SCHEMATIC DIAGRAM PLL PROGRAMME
5. uonisue 15 482 9 4 us JE pum L 0 L YH L L L L 0 L H2 L 1 L L L 1 0 imul L L L HD 512 J SN PRS CHANNEL COUNTER DISPLAY DRIVER TRUTH TABLES 5 p LH 1 Mio 5 5 et m GK 3 DEE 5185903 E 1 25387 E CO RF IF P C BOARD BOTTOM VIEW g San PEGE Ea a PE 8 8138 150 330028 6 1 8125 10 1 154 W EET T1 4421 20 2 m0 300 wee 2 i mede no spia BES A wo fas 3 DAT ST T Hae E E ert pg A t 3T pm 4 to Ir 3 XN 5
6. ED R42 22K En Gaol 15 18 280373 N7405A 1 2 BASTIA GETI 82 0027041 Ting 10K 13WK 030 160 IC 3 N74145B 27 28 30 250526 or 250789 229 25C735 Y SYMBOL INDICATES DC VOLTAGE MEASURED WITH DC VOLTMETER JNDER FOLLOWING CONDITIONS CH 1 LO BAND MANUAL OPERATION MINIMUM AND SQUELCH OUT SYMBOL INDICATES VOLTAGES FOR HIGH BAND OPERATION SYMBOL INDICATES VOLTAGES FOR UHF BAND OPERATION 19 SCA MASTER INTER CONNECT DIAGRAM TNO TRAON VSD HOS wasn c pasna 14 WOVE AMOS ree ANO DIN 21 ve Er 2 15 anm mosean romanos 2 2 HUA tha u ww 2 Ano svi av 7 el 35 3 4695 82 39 80807 I d HIWNVHYDOUd TId OLN 1 01 02 01 8 9 10 COPAN TID
7. 1 2 3 Weak battery 9 volt Faulty memory protector Q1 2 and or associated circuit component on DIGITAL P C Board Faulty power supply and regulator circuit compo nent parts on P C Board 13 Program memory operates in read out and write on but unit does not operate on any bands 1 2 3 4 Defective integrated circuit 1 5 6 9 14 and transistor 02 3 5 or PLL circuit component parts of PLL PROGRAMMER P C Board Defective VCO circuit component parts on RF IF Board Defective band selector 1 3 and power supply switching circuit component parts on RF IF P C Board Defective Low band RF amp and or mixer circuit component on RF IF P C Board 14 VHF Hi band does not operate but VHF Lo and program are OK 1 2 3 4 Defective band selector 1 3 and or power supply switching circuit component parts on RF IF P C Board Faulty crystal X 4 60 000 MHz and OSC circuit component parts on P C Board Faulty RF switching circuit component on Board Defective high band RF amp mixer and buffer amp circuit component on RF IF P C Board Symptom Possible cause UHF Lo Mid Hi does not operate but VHF Lo and Hi are OK Defective band selector 1C 3 and or power supply switching circuit component parts on RF IF P C Board Faulty diode D22 23 and or tripler 021 circ
8. Skipper does not operate Defective Channel Digit switch Faulty diodes D7 D11 and 012 or skipper circuit component on SCANNING PROGRAMMER P C Board Delay does not operate Faulty diode D 20 or Electrolytic capacitor C76 on RF IF P C Board 35 Symptom Possible cause 10 PROGRAM does not operate or makes mistakes in read out and or write on 1 2 3 4 5 6 7 8 Defective PROGRAM switch ENTER switch and or associated circuit component Defective Channel Digit switch Defective integrated circuit IC 1 on DIGITAL P C Board Defective SCANNING PROGRAMMER P C Board component parts Defective PLL PROGRAMMER P C Board compo nent parts Faulty memory integrated circuit 4 and or associated circuit component parts on the PLL PROGRAMMER P C Board Faulty integrated circuit 1 1 2 3 7 8 and or associated circuit components parts on the PLL PROGRAMMER P C Board Faulty DISPLAY P C Board 11 Memory operates but after a certain period the read out memory becomes faulty 1 2 3 Weak battery 9 volt Defective diode D35 38 and or associated circuit component on RF IF P C Board Faulty memory IC 4 or associated circuit compo nent on PLL PROGRAMMER P C Board 12 Program memory operates but in case of repeated moving of power switch to ON and OFF the memory read out becomes faulty
9. 280 316 VICTORIA ROAD PARC INDUSTRIEL DE NANINNE BILSTON ROAD RYDALMERE N S W 2116 5140 NANINNE WEDNESBURY STAFFS WSIO 7JN 2A7 Printed in Japan CANADA BARRIE ONTARIO CANADA L4M 4W5
10. 9 CHAR PT 33x 5 prom gt 8 E wu 5 5 5 x lt 5 8 2 8 LJ wus PROGRAM SQUELCH VOLUNE 23 PLL PROGRAMMER BOARD 5 DIAGRAM im 07 9 250373 PLL PROGRAMMER BOARD TOP VIEW BOTTOM VIEW sie EE dtc 25 DIGITAL DISPLAY BOARDS SCHEMATIC DIAGRAM III DIGITAL BOARD BOTTOM VIEW TOP VIEW ps tj DNN 2 EXPLODED VIEW PLASTIC SCREW 8 CHASSIS GE 214 5720 JERN __ NET _ 13 HEAT SINK GE 210572 INSULATOR TRANSISTOR 250526 or 256780 LOCK WASHER NUT el P C BOARD DISPLAY P C BOARD TOP VIEW T m Ei xa 93 Or Qr E E E BOTTOM VIEW Hee Hes fee How 5 2 duros OOOO OO 28 v r Tini 87 57 87 62 108 CONFIGURATIONS 400 7404 1
11. m 301231084 9 9 uxowvo oso i 1 X 2 tzo izo T nv nw aL d asa T 04 ENVER nm Gam anne ml ema 1 1 wnsnos diy 38 mee Posi ir t 699 to Lia E sua 1 Lej 222 gnano mu DISASSEMBLY DIAGRAM Refer to Figure 3 Step 1 Remove two bracket screws A and the bracket B Step 2 Remove four screws C two from each side of the cabinet Step 3 Open the cabinet FIGURE 3 CHASSIS DISASSEMBLY ALIGNMENT PREPARATION Test equipment required 7 VHF sweep generator with variable marker 1 Oscilloscope 0 500 kHz 0 50 MHz 30 52 MHz 148 174 MHz 2 AC VTVM 8 UHF sweep generator with variable marker 3 DC 450 512 MHz 4 Frequency counter 60 MHz 9 FM signal generator 30 50 MHz 150 172 5 8 ohm dummy load MHz 450 512 MHz 6 Slow sweep generator with variable marker 10 7 MHz NOTE 1 Use non metallic tuning tools The test equipment and receiver should be warmed up at least 10 minutes before proceeding with alig
12. 15 CE04W1A101A FC 80 4 1 100 RESISTORS 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 Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film 4700 10KQ 47 3302 3 9KQ 1 47 10KQ 10 4709 4702 472 47 10 47 100KQ 1 8W 1 8W 1 8W 1 8W 1 8W 1 8W 1 8W 1 8W 1 8W 1 8W 1 8W 1 8W 1 8W 1 8W 1 8W 1 8W 1 8W 1 8W 1 8W 1 8W 1 8W 1 8W 1 8W 1 8W 1 8W 1 8W 1 8W 1 8W 1 8W 1 8W 1 8W 1 8W 5 5 5 5 5 5 5 5 5 5 5 25 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 ERD 18TJ 332 ERD 18TJ 103 ERD 18TJ 471 ERD 18TJ 103 ERD 18TJ 103 ERD 18TJ 103 ERD 18TJ 472 ERD 18TJ 102 ERD 18TJ 472 ERD 18TJ 472 ERD 18TJ 331 ERD 18TJ 392 ERD 18TJ 102 ERD 18TJ 103 18 473 ERD 18TJ 103 ERD 18TJ 103 ERD 18TJ 103 ERD 18TJ 103 ERD 18TJ 103 ERD 18TJ 103 ERD 18TJ 471
13. Ceramic Ceramic Ceramic Ceramic Ceramic Mylar Mylar Mylar Mylar Mylar Ceramic Ceramic Electrolytic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Mylar Electrolytic Ceramic Electrolytic Electrolytic Electrolytic Ceramic Electrolytic Electrolytic Electrolytic Ceramic Electrolytic Electrolytic Electrolytic Ceramic Ceramic Tantalum Trimmer Trimmer Trimmer Trimmer Trimmer Trimmer 0 00474F 10pF 56pF 47pF 0 0047 10 2pF 7 0 01uF 0 024 0 014F 0 14F 0 00274F 0 0014F 0 014 2204F 0 0014F 100pF 100pF 10pF 0 00474F 10pF 0 014F 2204F 0 044F 2204F 33004F AUF 0 04uF 2204F 2204F 47 0 044F 47 2204F 10004F 0 014F 0 014F 22 10pF 10pF 10 16WV 25WV 25WV 25WV 16WV 16WV 16WV 16WV 16WV 16WV 25WV 6 3WV 80 20 0 10 10 80 20 0 5pF 0 5pF 30 5 0 5pF 80 20 10 10 10 410 10 20 80 20 50 10 20 1096 10 0 5pF 80 20 20 5pF 10 50 10 80 20 50 10 50 10 50 10 80 20 50 10 50 10 50 10 80 20 50 10 50 10 50 10 80 20 80 20 20 Eo 0729 0729 0561 0561 0561 0561 5 100 50 100 100 5 100 50 50 50 50 135 5 100 MC 70 CEO4W1C22
14. N7 14 13 12 1 10 8 8 32 10 9 8 GND GND 1 2 3 4 5 6 7 1 2 3 4 5 6 T 7405 14 13 12 11 10 9 8 Pil GND 37 74145 7493 INPUT NC A D GND 13 12 15 14 142 io 9 Vec J a 75 INPUT 1 Ro 2 NC NC NC B N74150 DATA sor anam Dayo VA F E E09 STORAGE ENABLE 2 vestir on pesas Mong Pow AA AA AA 5 7 0 srnose LI T ttt 1 No OUTPUT DATA omnes OUTPUT W N74164 OUTPUT OUTPUT OUTPUT OUTPUT OUTPUT OUTPUT OUTPUT OUTPUT OUTPUTS Qs Qc Qo Grine 5 51 a Mo ow ANNMAN EL 08 Oe 05 257 CLEAR CLEAR OHTA B Ba On Oc GND SERIAL INPUTS
15. pF capacitor to O6 Emitter circuit Refer to Figure 6 JE 10 COUNTER FIGURE 6 Step 2 Read frequency on the Frequency Counter Normal 10 245 MHz 1 kHz NOTE Frequency Counter coupling capacitor should as small a value as possible Frequency Counter should be high impedance type X1 10 245 MHz IF SECTION ALIGNMENT Step 1 Connect instruments as shown in Figure 7 Step 2 Maintain Sweep Generator output at the lowest level possible to prevent overloading NOTE To perform the next adjustments it is necessary to remove the Battery Compartment Step 3 Adjust T4 and T5 for maximum output and adjust T6 and T7 so that the 455 kHz marker is in the center of the discriminator curve and for best linearity as shown in Figure 8 UNIT 15 kHz UNDER TEST TP 5 input e1 1004V output e2 3 8VP P SWEEP 455 kHz 39 GENERATOR 15 kHz FIGURE 7 IF SECTION ALIGNMENT TEST EOPT HOOK UP FIGURE 8 IF DISCRIMINATOR CURVE VHF LOW BAND RF AMP ALIGNMENT NOTE For this test you will MANUALLY select either channel 1 2 3 or 4 Step 1 Connect instruments as shown in Figure 9 Step 2 Select Channel 1 with the MANUAL button Step 3 Adjust T1 T2 and T3 so that the 30 MHz marker is in the center of the curve and for maximum output Step 4 Select Channel 3 The Sweep Generator output should appear with the 50 MHz marker in the center of the curve If necessary read
16. 3 State Enabl Ds tate Enable c High Registance State 1 1 ms WE 1031 Vop 318 20 A2 15 sTo t 3 Din 14 70 4C WE TNS Ago 5L A3 12 A50 i 58 o ST A r 18x 16x 1 A40 7 as Dout pa 10 81 vss 19 L A20 o 25 Alo 58 1 le A00 ete T A TC5082 xr Xrour O T 1 gt RT ET EE TERT eee 85558585829 2011 109 Gt 9 9n e 7 BA 511A 010 4o 50 04 1 t j 02 6 3 58 PIN TA 58 INN 125 10 7 93 SEMICONDUCTOR LEAD IDENTIFICATIONS 254495 0 25 372 0 25 373 25 387 25 394 25 785 25 735 2SC535 B 25 789 250526 0 25 1117 35 35 35 59 2 Collector A 3 Base B 1 1 Emitter 2 2 Collector Base 1 1 2 B 2 Collector Heat Sink 3 Emitter A 1 Emitter D E D 1 Emitter E Em 2 Base 3 Collector 4 Case TROUBLESHOOTING Symptom Possible cause 1 Channel Indicator LED does not light and no sound output Volume Control MAX Channel Digit Switches Pushed in Squelch Control Extreme CCW Faulty line power cord Defective power transformer Defective power
17. LEVEE 0O CG O 4 1 3 2 1 2 8 0122 4 6 8 10 12 12 10 11 4 6 8 LEVEL oth DISPLAY 7 CH NO 6 8 9 10 11 12 13 14 15 16 0 LOW LEVEL 1 HIGH LEVEL 1 LED ON FIGURE 15 13 OPERATION OF SCANNING PROGRAMMER CIRCUIT 1 Data read out and write on Clock OSC IC7 2 6 TA 3 D21 generates sixteen pulses 2 After address counter 6 counts sixteen pulses word senser 5 1 4 D17 20 operate Then channel counter counts the next pulse and LED display will read out the next channel 3 Then word senser becomes H level and scanning control is decided by C5 33 uF on the Scanning Programmer P C 4 Channel counter and channel display driver operation are the same as PRO 16A 20 165 5 See Figure 16 for timing diagrams at each point driven from this signal Scanning rate is POINT TIMING DIAGRAM TA 1 APPROX 10 100 se TP 3 et 10 Lov T av TP ALL CH DIGIT SW PUSHED IN IE APPROX 100 m Sec 3l 2 1 LE E 23 23 FIGURE 16 097 Aeidsiq paysew janaj 6 4 0 o1
18. NO 7101 1A 2A SN1301 GE 21D 5721 GE 21D 5722 SR 3P 4 95KU4822 B 500 375 GE 21D 5733 SG 7615 K5130 10105 BLK GE 21D 5732 2F0 0009DF 2020 LR205 2 Description RS Part Number Part Number Speaker Screws Nut Nut Nut Nut Speaker pad Styrofoam pad for battery Styrofoam pad for P C Board 8 3P DC jack Volume knob Pan head tapping screw Pan head tapping screw Pan head screw Pan head screw Pan head screw Pan head screw Bind head screw Black Flat countersunk head screw Pan head plastic screw Lock washer Lock washer Flat washer IL Flat washer 54529 EP 100715ST GE 21D 5982 GE 21D 5795 GE 21D 5776 1476 GE 20D 5313 J 0900 K2381 3 6 mm 3mm x 8mm 4 3 6 mm 8 4 x 8 mm 3 8 3 6 mm 10 3 4 7 mm 9 3 4 7 mm 9 R2 4 7 8 RESISTORS T R1 Carbon film 1 8MQ 1 2W 320 Carbon film 1 8W 5 ERD 12TJ 185 ERD 18TJ 103 POTENTIOMETERS CANADA MODEL al Potentiometer SQUELCH Potentiometer VOLUME P 1714 P 1713 VM10A 50KQB25 VM11A975 5M1411 50KA Description RS Part Number MFR s Part Number AC cord CSA listed Line cord strain relief 89 J SR 594
19. R80 Metal film 2W 10 ERF 2SK8RO R81 Carbon film 1002 1 8W 5 ERD 18VJ 101 R82 Carbon film 4700 1 8W 5 ERD 18VJ 471 R83 Carbon film 1 8W 5 ERD 18VJ 472 R84 Carbon film 1 8W 5 ERD 18VJ 103 R85 Carbon film 1000 1 8W 35 ERD 18VJ 101 R86 Carbon film 1 8W 5 ERD 18TJ 332 R87 Carbon film 1 8W 5 ERD 18VJ 105 R88 Carbon film 470 1 8W 5 ERD 18V 470 R89 Carbon film 1002 1 8W 35 ERD 18VJ 101 R90 Carbon film 3302 1 8W 5 ERD 18VJ 331 R91 Carbon film 22KQ 1 8W 5 ERD 18VJ 223 R92 Carbon film 1 8W 35 ERD 18VJ 103 R93 Carbon film 2 2 1 8W 35 ERD 18VJ 222 R94 Carbon film 1002 1 8W 5 ERD 18VJ 101 R95 Carbon film 39KQ 1 8W 5 ERD 18VJ 393 R96 Carbon film 1 8W 35 ERD 18VJ 103 R97 Carbon film 1 8W 5 ERD 18VJ 102 R98 Carbon film 1 8W 35 ERD 18VJ 102 R99 Carbon film 1 8W 5 ERD 18VJ 102 R100 Carbon film 820 1 8W 5 ERD 18VJ 820 R101 Carbon film 470 1 8W 35 ERD 18VJ 470 R102 Carbon film 2 2KQ 1 8W 35 ERD 18VJ 222 R103 Carbon film 2 2KQ 1 8W 55 ERD 18TJ 222 R104 Carbon film 470 1 8W 5 ERD 18VJ 470 R105 Carbon film 22 1 8W 5 ERD 18VJ 222 R106 Carbon film 2 2KQ 1 8W 55 ERD 18VJ 222 R107 Carbon film 470 1 8W 5 ERD 18VJ 470 R108 Carbon film 22KQ 1 8W 5 ERD 18VJ 222 R109 Carbon film 22KQ 1 8W 35 ERD 18VJ 222 R110 Carbon film 1 8W 5 ERD 18VJ 103 111 Carbon film 3 18KQ 1 8W 1 CRB1 4FX R112 Carbon film 3 18KQ 1 8W 1 CRB1 4FX R113 Car
20. by varying the local oscillator frequency we get more frequencies than variance of f would allow For VHF lo nolocal oscillator frequency VHF hi 120MHz X4 and 014 UHF lo 420 MHz X4 021 mid 440 0025 MHz and 021 hi 460 0025 MHz X2 and 021 These local oscillator frequencies are the number X on page 12 of Owner s Manual Then how can we enter the choice of local oscillator frequency and the value of N That s where the binary frequency code comes in The first three digits determine the frequency band Refer to page 12 of Owner s Manual The remaining 13 digits determine the Calculation system uses two base of 16 groups and one base of 10 group First divide by 2560 16 x 16 x 10 Let s use above example here also 10 220 _ 2560 3 9921875 gt And the rest is outlined in Owner s Manual pages 12 and 13 We ve simplified the calculation in Owner s Manual by combining above two formulas into one You might be interested in knowing what frequency increment each of the code digits represents This chart shows you the values assigned to each of the numbers in the last three groups Code Group r Digit No 5 14 Digit LED lit MHz MHz k 0 04 0 02 Digit LED not lit RADIO snack DIVISION OF TANDY CORPORATION 5 FORT WORTH TEXAS 76102 TANDY CORPORATION AUSTRALIA BELGIUM
21. switch DC or AC line fuse blown Defective diodes 039 041 on P C Board Defective voltage regulator circuit component on P C Board Channel Indicator LED lights but no sound Volume Control MAX Squelch Control Extreme CCW Channel Digit Switches Pushed in Defective speaker or speaker jack Faulty AF amplifier circuit component on RF IF P C Board Faulty IF amplifier circuit component on RF IF P C Board Sound but channel lamp does not light Volume Control MAX Squelch Control Extreme CCW Channel Digit Switches Pushed in Defective Channel Digit switch or defective display circuit component Defective 5 V Regulator circuit component on RF IF P C Board Does not scan and Squelch does not operate Defective Squelch control Defective IF amplifier circuit on RF IF P C Board Defective noise amplifier noise detector and or in tegrated circuit 1 on RF IF P C Board Does not scan but Squelch operates Defective SCANNING PROGRAMMER P C Board Defective SCAN or MANUAL switch or faulty associat ed circuit component MANUAL selector does not operate but auto SCAN operates Defective MANUAL switch or associated circuit com ponent Defective D3 and integrated circuit 1 3 or transistor array TA 1 on SCANNING PROGRAMMER P C Board Auto SCAN does not operate but MANUAL selector operates Defective SCAN switch or associated circuit component
22. 024 20 16WV 50 10 0 0022uF 20 0 0022uF 20 16WV 50 10 10 0 0014 F 20 0 14 F 80 20 50WV 75 10 47uF 16WV 50 10 0 014 10 2204F 16WV 50 10 0 004 7uF 10 0 024F 10 0 00474F 10 THF 50WV 75 1096 0 014F 10 0 00274F 10 16WV 50 10 16WV 50 1096 0 014F 2109 16WV 50 1096 0 14F 80 20 47 16 50 10 10pF 0 5pF 7pF 0 5pF 33pF 359 5 0 001 20 20pF 5 2pF 0 5pF 0 0014F 20 O 1MF 10 0 0014F 10 0 001 10 30 5 0 0014F 20 0 0014F 20 SCP 100 PC 50 50 50 5 100 5 100 5 100 5 100 50 5 100 80 50 SCP 50 CE04W1C470B 5 80 CE04W1C100F SCP 80 SCP 80 CEO4W1C100F SCP 50 SCP 60 MC 135 04 1 010 CE04W1C470B 4 1 221 CE04W1H010 CE04W1C100F 4 1 100 CDO4W1C100F MC 135 CE04W1C470B FC 50 FC 50 FC 50 FC 50 SCP 60 FC 50 FC 50 SCP 60 SCP 60 SCP 60 FC 50 SCP 60 SCP 60 TS Description RS Part Number MFR s Part Number C106 C107 C108 C109 C110 111 112 113 114 115 116 0117 0118 0119 C120 C121 0122 C123 C124 C125 C126 C127 C128 C129 C130 C131 C132 C133 C134 C135 C136 C137 C138 C139 C140 C141 C142 C143 TC 1 Ceramic Ceramic Ceramic Ceramic Ceramic
23. 1E 5 60 70 70 50 5 100 50 04 1 221 MC 100 4 1 221 1E332 CE04W1C470B MC 100 CE04W1C221E 4 1 221 CE04W1C470B MC 100 CE04W1C470B 4 1 221 04 1 102 70 70 515 3220 15 12 10 52 ECV 1ZW10X52 ECV 1ZW50X32 ECV 1ZW50X32 ECV 1ZW50X32 ECV 1ZW10X52 2 0 Ref Description RS Part Number MFR s Part Number COIL TRANSFORMERS FILTERS CRYSTALS T10 T11 T12 2 L3 L4 L5 L6 L7 L8 L9 L10 L11 L12 L13 L14 L15 L16 L17 2 4 5 10 10 Lo RF coil IFT 10 7 MHz IFT 10 7 MHz IFT coil Discriminator coil VHF Hi RF coil VHF Hi RF coil VHF Hi RF coil Coil VCO coil VHF RF coil RFC 10 Balun coil VHF OSC coil RFC 2 2mH UHF Tank coil RFC 10 uH UHF Tank coil VHF OSC coil 68 1 8 4H 33 33 uH 33 uH 2 4H 2 Choke 18 HH Crystal filter 10 7 MHz Crystal filter 10 7 MHz Ceramic filter 455 kHz Ceramic filter 455 kHz Ceramic filter 455 kHz Crystal 10 245 MHz Crystal 65 71464 MHz Crystal 62 85750 MHz Crystal 60 00000 MHz CA 4549 CA 3482 CA 3482 CA 4653 CA 4653 CA 3484 CA 2997 CA 3481 CA 3481 CA 4547 CA 3483 CA 3482 CA 3486 C 0728 CA 3487 CA 4546 727 4654 0
24. 5 8 512 450 1 1 0 944 5 GENERATOR FREQ MHz FIGURE 13 BAND RF TEST HOOK UP FIGURE 14 Mb LOW HIGH OVERALL ALIGNMENT AND SENSITIVITY MEASUREMENT Step 1 Step 2 Step 3 Step 4 Step 5 Step 6 Step 7 NOTE Connect Signal Generator to ANTenna jack and AC VTVM with 8 ohm dummy load to EXT SPeaKeR jack Turn SQUELCH fully counterclockwise Set for reception of the channels noted in the following chart Set the SSG to the center of each band BAND FREO VHF LO 40 MHz VHF HI 160 2 LO 460 MHz UHF MID 480 MHz UHF HI 500 MHz Set the Signal Generator frequency to 40 MHz channel 2 and readjust T4 and T5 for maximum output Set the Signal Generator frequency to 160 MHz channel 6 and adjust L4 for maximum output Set the Signal Generator frequency to 480 MHz channel 12 and adjust L9 and TC 2 for maximum output For each frequency channel set the signal generator to each frequency no modulation and mini mum output and set VOLUME control to 0 dB 0 775 V reading on the VTVM Increase output of the generator to obtain reading 20dB on the AC VTVM The generator output now equals the 20 dB noise quieting sensitivity Alignment of T11 on the RF IF P C Board is not required It happens 10 be adjustable only because of ease parts procurement and does not need any adjustment OPERATION
25. 60831402 831602 3024 20 3024 9 3024 20 GE 21B 5700 HOW THE 100 CIRCUIT FUNCTIONS Refer to page 4 for basic concept of PLL circuits Also refer to page 5 Block Diagram The value of for COMP 100 can be varied from 8 140 to 12 540 thus f of VCO be varied from 40 7 MHz to 62 7 MHz f x fi 5 kHz The input signal fi is generated by X1 5 12 MHz on the PLL PROGRAMMER P C Board This is divided by 1 024 through 6 to produce frequency of 5 kHz The receiving frequency is first mixed with local oscillator frequency derived from X2 X3 or through doubler O14 or x7 multiplier O21 on the RF IF P C Board This is mixed with f of VCO to produce the IF 10 7 MHz The choice of crystals and multiplier is made by 1 3 on P C Board in accordance with the band selected Let s say we want to tune to 460 4 MHz 1C 3 selects 60 000000 MHz and x7 multiplier 021 So the local oscillator frequency is 420 MHz This is mixed with receiving frequency and produces 40 4 MHz Now f of VCO must be 51 1 MHz in order to obtain 10 7 MHz IF 40 4 MHz 10 7 MHz Therefore must be 10 220 51 1 MHz divided by fi 5 kHz Thus to calculate use this formula _ VCO Receiving frequency local oscillator frequency IF 10 7 MHz fi 5 kHz 5 kHz N In the example above _ 460 4 420 10 7 _ 10220 You will note that
26. 728 4654 3485 2190 2909 0726 0726 0726 3488 3488 3182 0725 0725 0578 0578 113 4427 113 53442 113 53442 119LC 470033N3 119LC 470033N3 7MC 452503N 7MC 2091N 113 51272 113 51272 1135 4580 126LN 5730A 113 53442 6 55 0 097 LF4 100K 6 5SN0 099 6 5SN0 087 FL 7H 093 LF4 100K 8LNR 093 6 5SN0 104 ELO606 R68M LF4 1R8K FL 3H FL 3H FL 3H 4LNC 092 4LNC 092 3B 037 CMF 10 7 or 10 15 10 7 10M15B LF C18 or BFB455L MISCELLANEOUS Test pin IC socket Shield plate Ceramic stand off Ceramic stand off P C Board VCO shief plate with insulator L 10 mm L 20 mm 96461 831402 CE 21D 5910 GE 21B 5694 GE 21D 6070 6071 Description RS Part Number MFR s Part Number SEMICONDUCTORS Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Transistor FET FET Transistor Transistor Transistor Transistor Transistor Silicon Silicon Silicon Variable capacitor Variable capacitor Variable cap
27. 740 TLR 104 C or D D14 Light emitting diode L 0740 TLR 104 C or D D15 Light emitting diode L 0740 TLR 104 C or D D16 Light emitting diode L 0740 TLR 104 C or D all MISCELLANEOUS Board holder GE 11D 593 P C Board GE 21C 5706 LED P C BOARD PARTS LIST Part Number Description RS Part Number L 0740 TLR 104 C or D Light emitting diode P C Board GE 21D 5708 48 A DIGITAL P C BOARD PARTS LIST Description RS Part Number MFR s Part Number CAPACITORS Mylar 0 1uF 310 Mylar 1096 MISCELLANEOUS Push switch 7293 2 0001 DF 3220 Push switch 7294 16FQ 0001BF 3220 P C Board connector 5490 3022 20 5491 3022 9 Board connector HB 5490 3022 20A P C Board connector HB 5491 3022 9A P C Board connector HB 5490 3022 20A P C Board connector HB 5490 3022 20A P C Board connector HB 5492 3022 3A P C Board connector HB 5493 5048 12A P C Board connector HB 5493 5048 12A P C Board GE 21B 5697 RESISTORS Carbon film 2700 1 8W 5 ERD 18TJ 271 2702 1 8W 35 ERD 18TJ 271 Carbon film 2700 1 8W 5 ERD 18TJ 271 Carbon film 2700 1 8W 5 ERD 18TJ 271 Carbon film 2700 1 8W 5 ERD 18TJ 271 Carbon film 2700 1 8W 35 ERD 18TJ 271 Carbon film 2709 1 8W 35 ERD 18TJ 271 Carbon film 2700 1 8W 55 ERD 18TJ 271 Carbon film 2702 1 8W 35 ERD 18TJ 271 Carbon f
28. ERD 18TJ 471 ERD 18TJ 470 ERD 18TJ 472 ERD 18TJ 103 ERD 18TJ 472 ERD 18TJ 104 ERD 18TJ 104 ERD 18TJ 472 ERD 18TJ 103 ERD 18TJ 104 Description RS Part Number MFR s Part Number SEMICONDUCTORS Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Diode Integrated circuit Integrated circuit Integrated circuit Integrated circuit Integrated circuit Integrated circuit Integrated circuit Transistor Transistor Transistor Transistor Transistor Germanium Germanium Germanium Geramanium Silicon Germanium Germanium Germanium Silicon Germanium Germanium Germanium Germanium Germanium Germanium Germanium Germanium Germanium Germanium Germanium Silicon Silicon Toshiba Silicon Toshiba Array Array Array 1N60 1N60 1N60 1N60 HV80 1N60 1N60 1N60 HV80 1N60 1N60 1N60 1N60 2N60 1N60 1N60 1N60 1N60 1N60 1N60 HV80 N74145 N74145 N7400 N7493 N7400 N7493 N7404 25 373 25 373 TA 58 TA 58 TA 58 1N60 1N60 1N60 1N60 HV80 1N60 1N60 1N60 HV80 1N60 1N60 1N60 1N60 1N60 1N60 1N60 1N60 1N60 1N60 1N60 HV80 N74145 N74145 N7400 N7493 N7400 N7493 N7404 25 373 25 373 58 58 58 MISCELLANEOUS IC socket socket Test pin P C Board connector P C Board connector P C Board connector P C Board 53 J 6462 HB 3996
29. ET EET Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Transistor Integrated circuit Integrated circuit Integrated circuit Integrated circuit Silicon Silicon Silicon Silicon Silicon Silicon Silicon Silicon Silicon Silicon Silicon Silicon Silicon Silicon Silicon Silicon Silicon Silicon Silicon Silicon Silicon Silicon Toshiba Toshiba Toshiba Toshiba Toshiba Toshiba Toshiba Toshiba Toshiba Toshiba Hitachi Hitachi Toshiba Toshiba Toshiba Toshiba Toshiba Hitachi Toshiba Toshiba Toshiba Toshiba 25 272 0 25 372 0 25 372 0 35 35 35 59 35 35 35 59 2SC785 R 25 373 25 373 25 373 25 373 25 1117 25 1117 25 387 25 394 25 495 0 25 495 0 2SA495 0 2SC535 B 250526 25 789 250526 25 789 25 735 250526 25 789 N7405A BA 511A N74145B 1648 25 372 0 25 372 0 25 372 0 35 35 35 59 35 35 35 59 2SC785 R 25 373 25 373 25 373 25 373 25 1117 25 1117 25 387 25 394 25 495 0 2SA495 0 25 495 0 25 535 250526 25 789 250526 25 789 25 735 250526 25 789 N7405A BA 511A N74145B MC1648P RESISTORS Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Carbon film Ca
30. OF PLL PROGRAMMER CIRCUIT 1 To pi with then rogram the National Weather Service station frequency 162 40 MHz for example select channel 1 the MANUAL selector button Slide the Program Door open and press in the PROGRAM button set the Digit switches in or out as shown below Indicator 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Teod 7 2 b 55 to release Digit switches at 3 7 10 11 All other switches are to remain pushed in 2 After setting the Digit switches press the ENTER button The code is then memorized and displayed the channel program code indicators instantly See Figure 15 for the timing diagram The displays shown in the timing diagram can be seen whenever the ENTER button is pressed 3 The memorized code controls the programmable counter IC 9 14 thru shift register IC 7 8 The programmable counter divides VCO frequency by the given code 4 The phase of the divided frequency and 5 kHz reference frequency are detected by phase detector 1 5 This phase difference controls VCO frequency 5 TP 3 is a PROGRAMMABLE COUNTER output terminal when in locked condition 5 kHz pulse signals appear APPROX 10 m Sec 4 1C 7 8 PINS Pine 111 1 11111111 e EM 1C 8 ei 107 IC PIN NO 1312 1106 4 13 12 11 106
31. OUTPUTS CLOCK CLEAR SERIAL INPUTS aa 1648 10 14 2 his 3 12 4 5 nio 5 7 4016 4018 10 H16 2q 015 30 14 4q pis 50 12 60 7H p10 sp 014 1 Q1 Output 4 8 5 Veet Bias Pt Tank Vee2 AGC 7900 9901 159 02 199 Loa D o 5 De Clock o c 02 a oo a 5 5 5 1 o o o 7 2111110 Buss 5 211011 3 2 9 o 1 o i 0 011 0 o o o o Vee Pin 16 GND Pin 8 og sro 146 2 263 7000 9 lo OUTPUT Cj count an oz 0100 Clock o px em 2 2 1 1 1 ss 22 2 1 0 0 Vee Pin 16 FREE Pi GND Pin 8 E 181118 8 110 00 10 7 6 MS 5 1 0 0 4 I 3 Gate of 2 0 011 0 3 i o o o o st 1 EIS 145 2 26P3 MC4044 100 14 20 13 sg 12 49 11 50 10 60 9 7q 8 12013 9 Q4 2 64 3 oa ws MTTL MTTL Output 7 1 vee 8 MC12014
32. R TOP VIEW PLL PROGRAMMER P C BOARD BOTTOM VIEW DIGITAL DISPLAY P C BOARDS SCHEMATIC DIAGRAM DIGITAL P C BOARD TOP VIEW DIGITAL P C BOARD BOTTOM VIEW EXPLODED VIEW SOI E E ERN A DISPLAY P CBOARDAMOP VIEW DISPLAY BOARD BOTTOM VIEW IC PIN CONFIGURATIONS SEMICONDUCTOR LEAD IDENTIFICATIONS PES HO OTILN REE PARTS LIST CHASSIS ASSEMBLY RETTIEICIBOARD 22 aden meen DISPLAY P C BOARD LED P C BOARD DIGITAL P C BOARD PLL PROGRAMMER P C BOARD SCANNING PROGRAMMER P C BOARD SPECIFICATIONS Description Nominal spec Limit spec VHF Lo VHF Hi UHF Lo UHF Mid UHF Hi Frequency coverage Scanning rate Variable speed Scan delay time Sensitivity VHF Lo VHF Hi UHF Lo UHF Mid UHF Hi Selectivity 6 dB 50 dB Spurious rejection VHF Lo at 40 MHz VHF Hi at 160 MHz UHF at 480 MHz IF rejection 10 7 MHz Image ratio VHF Lo VHF Hi UHF Modulation acceptance Squelch sensitivity Threshold Audio power output Current drain 13 8 V DC 30 50 MHz 150 172 MHz 450 470 MHz 470 490 MHz 490 512 MHz 10 channel sec 2 sec 1 for 20 dB quieting for 20 dB quieting 2 uV for 20 dB quieting 1 for 20 dB quieting 2 uV for 20 dB quieting 9 kHz 17 kHz More than 60 48 More than 35 dB More than 16 dB More t
33. SCP 80 SCP 60 SCP 80 SCP 60 FC 70 SCP 80 FCC 100 SCP 60 FC 50 SCP 100 SCP 100 SCP 60 SCP 100 SCP 60 SCP 60 SCP 50 SCP 50 FC 70 CE04W1C470B FC 50 CS15E1VOR1M SCP 60 SCP 50 CE04W1C470B SCP 50 SCP 50 SCP 50 SCP 50 CS15E1VOR1M FC 70 SCU 100 SCU 100 FC 50 FC 50 FC 50 SCP 60 SCP 100 Ref No RS Part Number MFR s Part Number C51 C52 C53 C54 C55 C56 C57 C58 C59 C60 C61 C62 C63 C64 C65 C66 C67 C68 C69 C70 071 072 073 C74 C75 C76 C77 C78 C79 C80 C81 C82 C83 C84 C85 C86 C87 C88 C89 C90 C91 C92 C93 C94 C95 C96 C97 C98 C99 C100 C101 C102 Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Electrolytic Ceramic Electrolytic Ceramic Ceramic Electrolytic Ceramic Ceramic Ceramic Electrolytic Electrolytic Mylar Electrolytic Mylar Mylar Mylar Electrolytic Mylar Mylar Electrolytic Electrolytic Mylar Electrolytic Ceramic Electrolytic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Ceramic Mylar Ceramic Ceramic Ceramic Ceramic Ceramic Description 0 004 7 80 20 10pF 0 5pF 0 5pF 10pF 0 5pF 0 0047 80 20 0 0047uF 80 20 0 00474 80 20 0 0047 80 20 10 0 5pF 0 0047uF 80 20 150pF 10 10pF 0 5pF 470pF 310 47UF 16WV 50 10 0 0
34. acitor Variable capacitor Variable capacitor Variable capacitor Silicon Silicon Silicon Silicon Silicon Silicon Silicon Silicon Germanium Germanium Germanium Germanium Silicon Silicon Silicon Silicon Silicon Germanium Germanium Germanium Germanium Germanium Variable capacitor Zener 9 1V Zener 5 6V Silicon Zener 5 6V Silicon Zener 5 6V Silicon Silicon Silicon Silicon Toshiba Silicon Toshiba Silicon Toshiba Silicon Hitachi Silicon Toshiba Silicon Toshiba Silicon Toshiba Silicon Toshiba HV80 HV80 HV80 54 54 54 54 54 54 HV80 HV80 HV80 HV80 HV80 HV80 HV80 HV80 1N60 1N60 1N60 1N60 HV80 HV80 HV80 HV80 HV80 1N60 1N60 1N60 1N60 1N60 FC 54M 0229 1A 0225 6 HV80 0225 6 HV80 0225 6 151885 1 2 1 18221 25 373 35 35 35 59 35 35 35 59 25 535 25 372 0 25 372 0 25 372 0 25 372 0 HV80 HV80 HV80 54 54 54 54 54 54 HV80 HV80 HV80 HV80 HV80 HV80 HV80 HV80 1N60 1N60 1N60 1N60 HV80 HV80 HV80 HV80 HV80 1N60 1N60 1N60 1N60 1N60 0279 1 0225 6 HV80 0225 6 HV80 0225 6 151885 1B2C1 18221 25 373 35 35 38 59 35 35 59 25 535 8 25 372 0 25 372 0 25 372 0 25 372 0 Description RS Part Number Part Number Transistor Transistor Transistor F
35. bon film 1 59KQ 1 8 1 CRB1 4FX R114 Carbon film 1 8W 35 ERD 18VJ 103 R115 Carbon film 1000 1 8W 35 ERD 18VJ 101 116 Carbon 1002 1 8W 5 ERD 18VJ 101 R117 Carbon film 4700 1 8W 55 ERD 18VJ 471 R118 Carbon film 1500 1 8W 5 ERD 18VJ 151 119 Metal 10 1W 5 ERX 1ANJ1RO R120 Carbon film 3900 1 8W 5 ERD 18VJ 391 R121 Metal film 19 5W 10 ERF 5SK1RO R122 Carbon film 3300 1 8W i596 ERD 18VJ 331 R123 Carbon film 1KQ 1 8W 5 ERD 18VJ 102 R124 Carbon film 10KQ 1 8W 5 ERD 18VJ 103 R125 Metal film 100 1W 5 ERX 1ANJ100 R126 Carbon film 1 8 5 ERD 18TJ 102 R127 Carbon film 1 8W 5 ERD 18TJ 335 DISPLAY BOARD PARTS LIST Description RS Part MFR s Part Number SEMICONDUCTORS D1 a Light emitting diode L 0740 TLR 104 C or D D2 Light emitting diode L 0740 TLR 104 C or D D3 Light emitting diode L 0740 TLR 104 C or D D4 Light emitting diode L 0740 TLR 104 C or D 05 Light emitting diode L 0740 TLR 104 C or D D6 Light emitting diode L 0740 TLR 104 C or D D7 Light emitting diode L 0740 TLR 104 C or D 08 Light emitting diode L 0740 TLR 104 C or D D9 Light emitting diode L 0740 TLR 104 C or D D10 Light emitting diode L 0740 TLR 104 C or D 011 Light emitting diode L 0740 TLR 104 C or D D12 Light emitting diode L 0740 TLR 104 C or D D13 Light emitting diode L 0
36. bs baz veo 8 Sis EON 0 Fx 031 3 D or 19101 7 5 2 1 571 Es SE oot pe 209 g e g 48 gt 12 Eur 365 P C BOARD SCHEMATIC DIAGRAM 0126373 C1 001 Di 5 D2 02 3 3SK35or 3skso cis 1000 078 54 002 RI 100K 012 13 3SK350r35K59 DIG HVO 522 SQUELCH 50 Tz 023 25 15 28 4950 c 8 Ej Gb pmo 8 R102 2 2K 019 20 29 7 11 R10322K 25 785 9 34 8104 47 5 5 ed 8 222 nene m 001 TC 10 100 102 00 023 C103 0047 58 more 4 R108 2 2K R109 2 2K L12 34H 38411 021 25 REMARKS 222 25C394 Y 1 RESISTANCE VALUES IN OHMS K 1 000 1 000 000 4 18 2 CAPACITANCE VALUES uF P uuF 3 5 C THIS I VOLUME A L J1THis Tuis Raa 330K RIS 330K
37. han 60 dB 40 dB at 30 40 MHz 25 dB at 50 MHz 70 dB at 160 170 MHz 60 dB at 150 MHz 20 dB at 480 MHz 35 kHz Less than 1 uV 2 watts Max 850 mA Squelched 1000 mA Max volume open squelch 30 50 MHz 150 172 MHz 450 470 MHz 470 490 MHz 490 512 MHz Approx 15 channel sec 1 5 sec 2 uV for 20 dB quieting 2 for 20 dB quieting 4 uV for 20 dB quieting 2 uV for 20 dB quieting 4 uV for 20 dB quieting 38 kHz 20 kHz More than 30 dB More than 20 dB Not limited More than 50 dB More than 20 dB More than 50 dB Not limited 7 kHz Less than 2 uV More than 1 5 watts 1000 mA 1200 mA Description Specification Program channel IF frequency Antenna impedance Built in speaker Power source and consumption Dimensions Battery drain life Battery drain Battery life 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 which still might 16 channels 30 52 MHz UHF and VHF Hi 10 7 MHz and 455 kHz 50 ohms 3 7 6 cm dynamic speaker 12 V DC Negative ground 16 watts 120 AC 30 watts Max Approx 3 1 4 x 10 D x 10 1 4 W 8 x 25 x 26 Approx 6 months Nominal 1 Approx 6 months Max 500uA be considered acceptable in no case should a unit perform to
38. he DC VTVM The Frequency Counter should read 40 700000 MHz 600 Hz Step 3 Next select Channel 3 and adjust TC 6 for 4 V on the DC VTVM The Frequency Counter should read 60 700000 MHz 600 Hz Step 4 Repeat steps 3 and 4 until no improvement is observed Make sure that the Frequency Counter reads 40 700 MHz for CH 1 50 700 MHz for CH 2 60 700 MHz for CH 3 and 62 700 MHz for CH 4 NUMBER DC VTVM FIGURE 4 VHF UHF LOCAL OSCILLATOR FREQUENCY CHECK NOTE For this test you will MANUALLY select either channel 1 5 8 11 or 14 Step 1 Couple the frequency Counter through a pickup coil to oscillator coil L9 Refer to Figure 5 Step 2 If necessary adjust L9 as follows As you adjust this coil you will note output increasing up to a certain point further adjustment will cause output to drop off slightly and still further adjustment will cause the oscillator to drop out Proper adjustment is at a point just before you get to maximum on the side away from oscillator drop out 1 2 diameter CHE 2 3 TURN LOOP P C B B FREQUENCY COUNTER FIGURE 5 LOCAL OSCILLATOR COUPLING Step 3 Adjust TC3 4 and 5 for the following frequencies Channel Freq 0 60 000000 MHz 200 Hz 60 000000 MHz 200 Hz 62 857500 MHz 200 Hz 65 714642 MHz 200 Hz LOCAL OSCILLATOR FREQUENCY CHECK 10 245 MHz Step 1 Connect Frequency Counter through a 10
39. hrough 16 as follows See page 13 for D procedure to enter code Receiving Channel Digit Switches VCO Frequency 5 6 10 12 18 14 1516 low CH 1 30 MHz 4 7 wg Jof X 40 700 MHz CH 2 40MHz 4 506 4 8 I0 M 50 700 MHz CH 3 50 MHz OT 60 700 2 4 52 MHz 62 700 MHz VHF high CH 5 150MHz 3 4 7 9 1011 40 700MHz CH 6 160MHz 34 5 6 7 8 1011 50 700MHz CH 7 172MHz 3 5 5 7 1011 62 700 UHF low CH 8 450MHz 2 grow ce ce 40 700 MHz CH 9 460MHz 208 55 o8 E 50 700 MHz CH10 470 MHz 2 x 8 y om g 60 700 MHz UHF mid CH11 470MHz 40 700 2 CH12 480 MHz 22 5706 7 85 50 700 MHz CH13 490 MHZ ER F 19 60 700 2 high CH14 490 MHz 40 700 MHz CH15 500MHz 4 YQ EGS 7 8 1011 s 50 700 MHz CH16 512MHz Tre 62 700 MHz NOTE Code Button in Code Number Button out VOLTAGE CONTROLLED OSCILLATOR VCO ALIGNMENT NOTE For this test you will MANUALLY select either channel 1 2 3 or 4 Step 1 Connect a DC VTVM and a Frequency Counter as shown in Figure 4 Step 2 Select Channel 1 and adjust T12 for 0 4 V on t
40. ilm 2702 1 8W 35 ERD 18TJ 271 Carbon film 2702 1 8W 35 ERD 18TJ 271 Carbon film 2702 1 8W i596 ERD 18TJ 271 Carbon film 2709 1 8W 5 ERD 18TJ 271 Carbon film 2700 1 8W 35 ERD 18TJ 271 Carbon film 2700 1 8W i596 ERD 18TJ 271 Carbon film 2709 1 8W 35 ERD 18TJ 271 Carbon film 1002 1 8W 5 ERD 18TJ 101 Carbon film 1500 1 8W 5 ERD 18TJ 151 Carbon film 1 8W 5 ERD 18TJ 332 Carbon film 220KQ 1 8W 5 ERD 18TJ 224 Carbon film 2702 1 8W 35 ERD 18TJ 271 SEMICONDUCTORS Diode Germanium 1N60 1N60 Diode Zener HZ3 C HZ3 C Diode Silicon HV80 HV80 Integrated circuit N74150 N74150 1 Transistor Silicon Toshiba 25 373 25 373 Transistor Silicon Toshiba 25 373 25 373 49 PLL PROGRAMMER P C BOARD PARTS LIST Description RS Part Number MFR s Part Number CAPACITORS Electrolytic 10WV Mylar Mylar Electrolytic 10WV Electrolytic 50WV Mylar Mylar Ceramic Tantalum Ceramic Ceramic Ceramic Mylar Mylar Mylar Mylar Mylar Mylar Mylar Mylar Mylar Mylar Mylar Mylar Mylar Trimmer 50 10 10 10 50 10 75 10 10 10 5 20 20 5pF 10 35 10 10 10 10 10 10 410 10 10 10 10 10 10 CE04W1A470B CE04W1A221E CE04W1H010 50 515 1 010 15 50 70 50 ECV 1ZW20X53 MISCELLANEOUS P C Board connector Board connector Board connecto
41. just TC 6 by rechecking step 3 of the VCO alignment Step 5 Make sure that the output curves are similar to Figure 10 for channels 1 thru 4 NOTE t is difficult to track these 4 different frequencies but differences of up to 6 dB are acceptable 50 52 gi 40 6 UNIT UNDER TEST p 2 o swEEP 0 1 3 GENERATOR 2 FIGURE 9 LOW BAND TEST HOOK UP FIGURE 10 10 NOTE this test will MANUALLY select either Channel 5 6 or 7 Step 1 Connect instruments as shown in Figure 11 Step 2 Adjust T8 9 10 and L1 for maximum output similar to the Figure 12 curve This curve should be dropping down by about 3 dB for CH 5 to 7 NOTE f you change the connection from TP 3 to TP 1 you should see a display similar to Figure 10 curve UNIT UNDER TEST 5 2 5 SWEEP TY FREQ MHz FIGURE 11 VHF HIGH BAND RF TEST HOOK UP FIGURE 12 UHF BAND RF AMP ALIGNMENT NOTE For this test you will MANUALLY select either Channel 9 12 or 15 Step 1 Connect instruments as shown in Figure 13 Step 2 Set TC 2 to minimum capacitance Step 3 Adjust TC 1 for maximum output and best curve symmetry as shown in Figure 14 480 ANT UNIT 194 XS 319 UNDER TEST
42. less than within any Limit Spec 100 does not require additional crystals to select frequencies as in previous scanners This is because COMP 100 includes a PLL circuit and a memory circuit PLL is phase locked loop which consists of a phase detector det low pass filter LPF and voltage controlled oscillator VCO See Figure 1 The phase detector produces a voltage proportional to the phase difference between two input signals This output voltage represents the frequency component of the input signal and also its harmonics plus extraneous noises The low pass filter integrates the output voltage of the phase detector and then filters harmonics and noises Then it produces a continuous voltage component in proportion to the phase difference The VCO is an oscillator which controls oscillation frequency a given control voltage It is used to assure that the control voltage and the oscillation frequency are proportional It is called LOCKED when input phase and output phase become the same This frequency width which keeps the locked condition and follows the input signal is called LOCKED RANGE fi 0i FIGURE 1 Figure 2 shows block diagram of the frequency synthesizer This is not direct feed back but this includes 1 N programmable divider in the feedback loop Oscillation frequency fo of the VCO is decided by times input frequency So fo If the input signal fi is derived from a
43. nment Input signal from the generator should be kept as low as possible and still obtain usable output NOTE 2 The 9 volt battery is required to hold the memory when AC is disconnected Always be sure the unit is loaded with a fresh 9 volt battery or the pre programmed channels will be lost and will have to be re programmed NOTE 3 The extension P C Boards are prepaired to check and or repair PLL PROGRAMMER and SCANNING PROGRAMMER Boards For PLL PROGRAMMER P C Board Part No GE 22B 6321 For SCANNING PROGRAMMER P C Board MFR s Part No GE 22B 6322 REFERENCE FREQUENCY OSC DIVIDER ALIGNMENT NOTE The reference frequency OSC Divider circuit is on the PLL PROGRAMMER P C Board Step 1 Connect Frequency Counter to TP 2 and ground Step 2 Adjust TC 1 On the PLL PROGRAMMER so that the frequency is 5 120000 MHz 230 Hz Step 3 Connect Frequency Counter to TP 1 and ground Read frequency on the frequency counter Normal 5 000 kHz ALIGNMENT AND TEST POINT POSITIONS RF IF P C BOARD Hn 1 5 d mue de zs xal Tea E i t y d 112 5 PLL PROGRAMMER 1 TC SCANNING PROGRAMMER P C BOARD FREQUENCY CODE PROGRAMMING FOR ALIGNMENT PREPARATION Before starting alignment enter program code into channels 1 t
44. ough 0 001 22 80 2096 80 20 80 20 0 5pF 80 20 80 20 80 20 80 20 80 20 80 20 5 PL 102BN PL 102BN PL 102BN 1HB3635L0300DE PL 102BN PL 102BN PL 102BN PL 102BN PL 102BN PL 102BN FC 50 MISCELLANEOUS AC cord UL listed ANT jack ANT supporter Battery box Battery box cover Battery snap Case bottom Case top Case pad Car mounting bracket Car mounting bracket screw Chassis Connector ass y Connector ass y Cord band Cord holder Strain relief DC cable with fuse holder Feed through capacitor plate Foot Front escutcheon assembly Fuse UL listed Fuse Fuse holder UL listed Heat sink A Heat sink B Line cord strain relief Lug terminal UL listed Nylon bushings P C Board holder Phone jack Power transformer UL listed Push knob black Push knob ivory Push switch RCA jack CEES ee 9 W 1907 J 0566 B 0258 CB 0172 B 0259 23275 23275 0160 5 0379 2 3274 5499 5500 1515 1649 W 1908 HB 5494 F 0065 HF 0018 F 1069 HH 0197 HH 0196 H 2542 HB 5498 HB 5495 0030 0594 2383 2382 5 7295 J 0801 6 feet BLK JA C 020 GE 13C 890 GE 21D 5728 GE 21D 5729 GE 21B 5724 GE 21B 5723 GE 21D 5981 GE 21C 5725 GE 16D 3166 GE 21A 5720 5047 12 5047 12 5125 180 4215 5121 GE 19D 4719 GE 21D 5730
45. r Board connector Board Crystal 5 12 MHz IC socket IC socket Test pin 4 6462 3996 3024 9A 3024 20A 3024 20A 3024 3A GE 21B 5703 C831402 C831602 CTP RESISTORS Carbon film 1 8W Carbon film 1 8W Carbon film 1 8W Carbon film 1 8W Carbon film 1 8W Carbon film 1 8W 25 25 5 5 5 5 ERD 18VJ 223 ERD 18VJ 104 ERD 18VJ 104 ERD 18VJ 331 ERD 18VJ 101 ERD 18VJ 331 Description RS Part MFR s Part Number 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 4702 4709 27 47 47 220KQ 1 8W 1 8W 1 8W 1 8W 1 8W 1 8W 1 8W 1 8W 1 8W 1 8W 1 8W 1 8W 1 8W 5 5 5 5 5 5 5 5 5 5 5 5 5 ERD 18VJ 332 ERD 18VJ 102 ERD 18VJ 471 ERD 18VJ 471 ERD 18VJ 272 ERD 18VJ 335 ERD 18VJ 472 ERD 18VJ 103 ERD 18VJ 103 ERD 18VJ 102 ERD 18VJ 103 ERD 18VJ 472 ERD 18TJ 224 SEMICONDUCTORS Integrated circuit Integrated circuit Integrated circuit Integrated circuit Integrated circuit Integrated circuit Integrated circuit Integrated circuit Integrated circuit Integrated circuit Integrated circuit Integrated circuit Integrated circuit Integrated circuit Diode Diode Transistor Transistor Transistor T
46. ransistor Transistor Transistor Transistor Transistor Transistor Silicon Silicon Silicon Silicon Silicon Silicon Silicon Silicon Silicon Silicon Silicon Toshiba Toshiba Toshiba Toshiba Toshiba Toshiba Toshiba Toshiba Toshiba F N7405 N7405 N7405 MCM14537 4044 5082 174164 74164 4016 4018 4018 4016 12014 12013 HV80 HV80 25 373 25 373 25 373 25 373 25 373 25 373 25 373 25 373 25 373 N7405 N7405 N7405 MCM14537 MC4044 TC 5082P N74164 N74164 4016 4018 4018 MC4016P MC12014 MC12013 HV80 HV80 25 373 25 373 25 373 25 373 25 373 25 373 25 373 25 373 25 373 SCANNING PROGRAMMER P C BOARD PARTS LIST Ref No Description RS Part Number 1 MFR s Part Number CAPACITORS 2 c5 c6 C7 C8 c9 C10 C12 C13 C14 015 C16 Mylar Tantalum Tantalum Tantalum Tantalum Electrolytic Mylar Mylar Ceramic Mylar Mylar Mylar Mylar Mylar Electrolytic Mylar 0 014 3 34F 1uF 100uF 0 01 0 014F 220pF 0 002uF 0 047uF 0 01uF 0 0068uF 0 00684F 10uF 0 014F 10WV 35WV 35WV 6 3WV 10WV 16WV 10 20 20 20 20 50 10 10 10 10 10 10 10 10 10 50 10 10 CS15E1A3R3M1S CS15E1E010M1S 515 1 010 15 515 0 330
47. rbon film 1000 100 47 470 1002 1002 47 4 100KQ 1000 22KQ 22 47 47 1000 1000 1MQ 2 200 1002 2 2KQ 470 1MQ 4700 56KQ 4700 1200 47 ERD 18VJ 102 ERD 18VJ 101 ERD 18VJ 104 ERD 18VJ 472 ERD 18VJ 102 ERD 18VJ 102 ERD 18VJ 474 ERD 18VJ 101 ERD 18VJ 102 ERD 18VJ 101 ERD 18VJ 334 ERD 18VJ 472 ERD 18VJ 334 ERD 18VJ 472 ERD 18VJ 104 ERD 18VJ 472 ERD 18VJ 104 ERD 18VJ 101 ERD 18VJ 223 ERD 18VJ 223 ERD 18VJ 473 ERD 18VJ 473 ERD 18VJ 104 ERD 18VJ 101 ERD 18VJ 101 ERD 18VJ 473 ERD 18VJ 105 ERD 18VJ 222 ERD 18VJ 222 ERD 18VJ 101 ERD 18VJ 102 ERD 18VJ 223 ERD 18VJ 103 ERD 18VJ 222 ERD 18VJ 470 ERD 18VJ 102 ERD 18VJ 103 ERD 18VJ 105 ERD 18VJ 332 ERD 18VJ 471 ERD 18VJ 563 ERD 18VJ 103 ERD 18VJ 471 ERD 18VJ 104 ERD 18VJ 102 ERD 18VJ 121 ERD 18VJ 332 ERD 18VJ 473 ERD 18VJ 332 ERD 18VJ 332 ERD 18VJ 103 ERD 18VJ 103 Ref Description RS Part Number MFR s Part Number R75 Carbon film 1 8W 5 ERD 18VJ 332 R76 Carbon film 1 8W 5 ERD 18VJ 332 R77 Carbon film 4 7 1 8W 35 ERD 18VJ 472 R78 Carbon film 9 1 8W 5 ERD 18TJ 392 R79 Carbon film 220 1 8W 5 ERD 18VJ 220
48. rbon 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 1 8W 1 8W 1 8W 1 8W 1 8W 1 8W 1 8W 1 8W 1 8W 1 8W 1 8W 1 8W 1 8W 1 8W 1 8W 1 8W 1 8W 1 8W 1 8W 1 8W 1 8W 1 8W 25 5 5 5 5 5 5 5 5 5 5 5 5 25 5 5 5 5 5 5 5 5 ERD 18VJ 102 ERD 18VJ 102 ERD 18VJ 102 ERD 18VJ 102 ERD 18VJ 104 ERD 18VJ 473 ERD 18VJ 104 ERD 18VJ 473 ERD 18VJ 101 ERD 18VJ 101 ERD 18VJ 104 ERD 18VJ 104 ERD 18VJ 104 ERD 18VJ 332 ERD 18VJ 101 ERD 18VJ 332 ERD 18VJ 332 ERD 18VJ 474 ERD 18VJ 102 ERD 18VJ 101 ERD 18V 474 ERD 18VJ 101 Description RS Part Number MFR s Part Number 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 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 Carbon film Carbon film Carbon film Ca
49. stable crystal oscillator frequency this PLL system works as a frequency synthesizer Reference frequency fo is divided by a code from the shift register The shift register shifts memory of the memory and transfers the code to the programmable counter The memory transfers a code to the shift register after memorizing the programmed code and read out write on 1 N PROGRAM MABLE DIVIDER FIGURE 2 IMPORTANT NOTE The P C Boards of the COMP 100 utilize plated through holes Connections are made from one side of the board directly to the other through a hole so that no soldering or jumper wires are required Do not mistakenly think the factory forgot to solder some connections on these boards We ve prepared special extender boards for ease of servicing these boards one extender available at each Service Center Use it when servicing the inner P C Board which can t be worked on without removing the P C Boards BLOCK DIAGRAM PEN M3LUSANI 14418 62920 woivinosu vta wore 10 23
50. uit component on RF IF P C Board Defective UHF RF amp and or mixer circuit compo nent on RF IF P C Board UHF Mid band does not operate but VHF Lo and UHF Lo are OK Defective band selector 1 3 or diode 025 031 on RF IF P C Board Defective crystal X 3 62 85750 MHz and or associ ated circuit component parts on RF IF P C Board UHF Hi does not operate but VHF Lo Hi and UHF Lo Mid are OK Defective band selector 1 3 or diode D26 D29 on RF IF P C Board Defective crystal X 2 65 71464 MHz and or associ ated circuit component parts on RF IF P C Board VCO does not oscillate correct frequency Faulty crystal X 1 and or integrated circuit 6 of PLL PROGRAMMER CIRCUIT Defective programmable counter circuit phase detector circuit and or associated circuit component of PLL PROGRAMMER P C Board Faulty 5 kHz filter and or buffer amp 026 circuit component parts on RF IF P C Board Defective VCO 4 and or varicap D32 or associated circuit component on RF IF P C Board NOTE Recheck to see that each connector is connected firmly 7 5 115 CHASSIS ASSEMBLY PARTS LIST Description RS Part Number Part Number CAPACITORS Feed through 0 001 Feed through 0 0014 Feed through 0 0014 Feed through 3pF Feed through 0 0014 Feed through 0 001uF Feed through 0 001 Feed through 0 001 Feed through 0 0014F Feed thr

Realistic Car Satellite TV System 20-110 User's Manual

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