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Tandy Radio Shack Realistic PRO-2004, Service Manual, Page: 1 / 75

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Tandy Radio Shack Realistic PRO-2004 Service Manual Download Page 1

Summary of Contents for Radio Shack Realistic PRO-2004

Page 1: ......

Page 2: ...CCW Distortion Meter SU AM 60 MOD at 1 kHz and Channel Programming Laad to EXT SPKR 100 IN output CH6 120 MHz AM JACK 2 Adjust T7 to maximum sensitivity Figure S 7 Same as step 6 Same as step 6 T8 I A...

Page 3: ......

Page 4: ...n Acceptance EIA R8 204 A Spurious Rejection at 328 MHz NFM Image Ratio at 70 MHz NFM 70 MHz 2x61 0 MHz 1290 MHz 150 kHz 300 kHz 8 kHz 40 dB 35dB 200 kHz 4OQ kHz 5 kHz 35 dB 25 dB IF Rejection 610 MHz...

Page 5: ...iving 5ystem Any 300 channels in any band combination 30 channels x 10 banks and 10 Monitor channels Liquid crystal display Direct Key Entry Digital Controlled Synthesizer Superheterodyne AC 120 V 60...

Page 6: ......

Page 7: ...MHz signal which is applied to WFM IF 012 or AM NFM IF 010 018 019 Corresponding with input from the keyboard CPU determines which of VCO or VCO 2 WFM IF AM NFM AM IF Data of PLL circuit to be functio...

Page 8: ...again Press SPEEOI sa that Scan speed is set to slow speed To call loeked out channels press ILOCK oUT REVIEWI Press ISPEEDI so tnat Scan speed is set to tast IThis function is avalIabie when locked...

Page 9: ...ndicated ehanne Search operation starts Key in he desired frequency in each ehannel as follows Key in the desired frequency with numeral keys Press lENTE RIto memorize the fre quency If wrong fTequenc...

Page 10: ...INTS L1NEAR PCB TP4 TP3 TP5 J L I O SHIELD CASE 0 t 55 SHIELD CASE r TPI T6 T4 113 D T7 5 T3 CF 2 I c J IPC I I L59 HIELD ASE PLL PCB SH ELO CASE TP2 SHIELD CASE l311 L309 SHIELO A CASE _ TP 301 I U Q...

Page 11: ...5 AM FM Signal Generator 25 to t300 MHz 6 Distortion Meter NOTE1 Use non metsttic runing tools The test eautoment and Receiver should be warmed up at least 30 minutes before proceeding w th alignment...

Page 12: ......

Page 13: ...low Figure 6 TP1 TP2 SJGNAL UNIT DCSSVM GENERATOR UNDER TEST c TP5 Control Setting Test Instrument Adjust Remarks Step Channel Programming Connection 4 OFF vOLUME control Connect Signal T13 Alignment...

Page 14: ...Distortion Meter 8n AM 60 MOD at 1 kHz and Channel Programming Load to EXT SPKR 100 p V output CH6 120 MHz AM JACK 2 Adjust T7 to maximum sensitivity Figure 8 7 Same as step 6 Same as step 6 T8 Align...

Page 15: ...res become as high as those coil case SIGNAL GENERATOR ANT connector o 11 Figure 9 UNIT UNDER TEST EXT SPKR an LDAD ACSSVM OSCILLOSCOPE Step Control Setting Test Instrument Adjust Remarks Channel Prog...

Page 16: ...Figure 10 Adjust L59 Remarks Alignment 1st IF 611 5 to 607 505 MHz S P F coil 1 Select channel 7 a00 495 MHz and set the Signal Generator frequency to a00 495 MHz FM 3 kHz DEV at 1 kHz and 1 pV output...

Page 17: ...T JC3 Pin No 4 L H L NFM MOD To adjust e1 voltage receive signal in Manual mode and set T13 to obtain 3 8 V O 1 V at TP4 It is convenient to use the National Weather Service signal for the adjustment...

Page 18: ...rigger and then observe the keys access pulse when IPROGRAM I key is pressed DATA WAVEFORM IC S03 I I I I I I I I I I I I I I 1 I OISPLAY OATA z __ PLL DATA I I I OISPLAY DATA I I I I Jr 16 7ms _aI I...

Page 19: ...PLL DATA WAVEFORM CLOCK Pin 191 DATA Pin 201 I 1 I Inl I I k I I I 424 u5 434 us l LT 1 I I Pin 17 l I I I I IE 286 us 434 us I e LT 2 I l Pi n 161 NOTE Data in Program mode when 150 000 MHz entered 1...

Page 20: ...ed circuit OK NO Memorv function work OK YES Is Back up battery OK Is voltage Regulator Is ICS03 and reset Is IC701 OK OK properlv END Is CPU control circuit Is AF filter select Is IC1 IC2 andlor whic...

Page 21: ...MEMORY CHECK I I I E _l l OOOO CHI I I S 1dl D F m _ U I Ofj I O OllOO Oe e C U 0 H H 0XI 3 34 rvu 0 w AC b t _ _2 I I _ Sw OOl I l C 0 0 _ _ IV n E OFlY _ OK 20...

Page 22: ...cuit consists of 1C3 IC4 and023 024 025 Replace the defective components 7 Defective Switching circuit consists of IC4 034 038 039 and 040 Replace the defective components 1 IC503 is running wild Pres...

Page 23: ...OS02 67 99S0 MHz Replace the defective components 2 Defective a p F Replace the defective components lS Low sensitivity between 68 0000 to 1 Defective DECODER SWITCHING circuit consists of ICSOl OS03...

Page 24: ...2 and or VCO filter 2 circuit 760 0000 to 1300 0000 MHz Replace the defective components 24 All band do not operate but display 1 Defective PLL circuit IC301 IC302 IC303 IC304 and or associated is OK...

Page 25: ...p e BOARDS TOP BOTTOM VIEWS LINEAR P C BOARD TOP VIEW p TPI f 24 TP4...

Page 26: ...LINEAR P C BOARD BOTTOM VI EW TP4 _ TPI...

Page 27: ...csu P c BOARD TOP VIEW 26 ua I Jo...

Page 28: ...CPU P C BOARD BOTTOM VIEW 27...

Page 29: ...PLL P C BOARD TOP VIEW TP301 3 I t O lt 28...

Page 30: ...PLL P C BOARD BOTTOM VI EW TP301 TP30z1 29 e...

Page 31: ...LI1 ZOLlt en 0 9IOU l Ja 0 s J J 1 0_ ut _ o a t _ l i i 0 o I 1 c i IJt vr N I I f f r 0 _ oallO tQ l UI i _ ca 1 l l N 1 1 N il N ol d t I I I __ _ 11 I I WOl r l t l J I i j 1 1 _ i 1 l _ N _ fltN...

Page 32: ...I 0 u tI N U Q God o I r 11 u Q Q a a l UI 0 u lOl Q al z u G a z IE I z J 0 a ld J U Q s a Q J _ J J __ 1 Q i _ z u 0 en 0 cS cS a u a e z ffi z 0 z 0 0 u z CD U 0 i e a c c J a en a IE z g Q Q ti e...

Page 33: ...p SpF 50WV O 5pF CO Q50CJBC C2C31 Pl HCG0500 C22 Chip 12pF 50WV S CO 120JJBC C2C31P1HCG120J C23 Chip lSpF SQWV S CO 150JJBC C2C31Pl HCG1S0J C24 Chip 12pF 50WV 5 CO 120JJBC C2C31 Pl HCG120J C2S Chip lO...

Page 34: ...OWV 5 CO 1S1JJBC C2C31P1 HCG1S1J C80 Chip 20pF SOWV 5 CO 200JjBC C2C31 Pl HCG200J C81 Chip 1S0pF SOWV 5 CO 1S1JJBC C2C31P1 HCG1S1J C82 Chip 20pF SOWV 5 CO 200JJBC C2C31 P1 HCG200J C83 Chip 1S0pF SOWV...

Page 35: ...0WV 10 CC l02KJBC HE50SJYB102K C135 Ceramic O OOlJlF 50WV 10 CC 102KJBC HE50SJYB102K C136 Ceramic O OOlJlF 50WV 10 CC 102KJBC HE50SJYB102K C137 Mylar 0 047JlF 50WV 10 CC 473KJBM AK1 UU473K50 C138 Myla...

Page 36: ...ytic O l11F 50WV 20 CC l04MJBA 50MVR10HA C194 Mylar 0 05611F 50WV 10 CC 563KJBM A 1 UU563K50 C195 Electrolytic 4 7JlF 25WV 20 CC 475MFBA 25MV4R7HA C196 Tantalum O l11F 35WV 20 CC l04MGBT DN1VOR1M1S C1...

Page 37: ...2K C303 Ceramic O OOlIJF SOWV 10 CC l02KJBC HESOSJYB102K C304 Ceramic O OOlIJF SOWV 10 CC l02KJBC HESOSJYB102K C30S Ceramic O OOlJ LF SOWV 10 CC l02KJBC HESOSJYB102K C306 Ceramic O OOlIJF 50WV 10 CC l...

Page 38: ...OO1J lF 50WV 10 CC l02KJBC HE50SJYB102K C360 Ceramic 100pF 50WV 10 CC 1D1KJBC HESOSJSL101 K C361 Chip 2pF 50WV 0 5pF CO 0200JBC C2C31 P1 HCG0200 C362 Chip 6pF 50WV 0 5pF CO QSOOJBC C2C31 Pl HCG0600 C3...

Page 39: ...D40CJBC C2C3l Pl HCG040D C419 Chip 4pF 50WV O SpF CD 040CJBC C2C3l Pl HCG040D C420 Ceramic 5pF 50WV O SpF CC D50CJBC HE40SJSL050D C421 Ceramic O OOlIlF 50WV 10 CC l02KJBC HESOSJYB102K CSOl Ceramic O...

Page 40: ...1 011 155241 5ilicon OX 2771 155241 012 155241 Silicon OX 2771 155241 013 155241 Silicon OX 2771 155241 014 155241 Silicon OX 2771 155241 01S 155241 Silicon OX 2771 155241 016 155241 Silicon OX 2771 1...

Page 41: ...585 Silicon DX Q636 lS1585 057 1S1585 Silicon OX 0636 lS1585 0301 lSS241 Silicon OX 2771 lSS241 0302 1SS241 Silicon OX 2771 lSS241 0303 lSS241 Silicon OX 2771 155241 0304 15S241 Silicon OX 2771 155241...

Page 42: ...MOS MX 7478 GRE0327 IC504 j LPD446G 45 Memory Back Up C MOS MX 7480 j LPD446G 45 TC55l7Cf 20 TC5527Cf 20 IC701 j LPD7225G OO LCD Controller C MOS MX 7481 j LPD7225G OO COl LS TRANSFORMERS Ref Ne Desc...

Page 43: ...Hz 40MHz to 67 995MHz 40MHz to 67 995MHz 40MHz to 67 995MHz 40MHz to 67 995MHz 10pH 68MHz to 107 995MHz 68MHz to 107 995MHz 68MHz to 107 995MHz 68MHz to 107 995MHz 68MHz to 107 995MHz 68MHz to 107 995...

Page 44: ...tripline on P C B L330 L501 Coil Choke 100 H LAL03KH 101 K L502 Coil Choke 100 H LAL03KH 101 K L503 Coil Choke 100 1 LAL03KH 101 K T 1 Coil 2nd I F CA 1211 GA N769 T2 Coil 2nd IF WFM Band CA 1212 GA N...

Page 45: ...PNPI w Resistor PNPI w Resistor NPNI NPNI NPN NPNI NPNI NPNI NPNI NPN NPNI NPNI NPNI NPNI PNPI w Resistor PNPI w Resistor RN2005 RN2005 2SC3358 2SC3358 2SC3358 2SC3358 2SC3358 2SC3358 2SC3358 2SC3358...

Page 46: ...0k ohm 1 8W 5 ND 0169EBN ERJ 8GCYJ474 R27 Chip 470k ohm 1 8W 5 ND 0169EBN ERJ 8GCYJ474 R28 Chip 470k ohm l 8W 5 ND 0169EBN ERJ 8GCYJ474 R29 Chip 470k ohm 1 8W 5 ND Ol69EBN ERJ 8GCYJ474 R30 Chip 470k o...

Page 47: ...N 0340ECC R016U473J R83 Carbon film 120k ohm 116W 5 N 0375ECC R016U124J R84 Carbon film 15k ohm 1 6W 5 N 0297ECC R016U153J R85 Carbon film 47k ohm 1 6W 5 N D340ECC R016U473J R86 Carbon film 10k ohm 1...

Page 48: ...film 100 ohm 1 6W 5 N 0132ECC RD165101J 33k ohm R140 Carbon film l 6W 5 N 0324ECC RD165333J R141 Carbon film 1 5k ohm 1 6W 5 N 0206ECC RD16U152J R142 Carbon film 3 3k ohm 1 6W 5 N 0230ECC RD16U332J R...

Page 49: ...ohm 1 6W 5 N 028 1 ECC RD16Ul03J R197 Carbon film lOOk ohm 1 6W 5 N D371ECC RD1GU104J R198 Carbon film 10k ohm 1 6W 5 N 0281 ECC RD1GU103J R199 Carbon film 82k ohm 1 6W 5 N D360ECC RD1GU823J R200 Carb...

Page 50: ...25PJ221 R254 Carbon film 220 ohm 1 4W 5 ERD 25PJ221 R255 Chip 100 ohm 1 8W 5 ND 0132EBN ERJ 8GCYJ10l R256 Carbon film 1 ohm 1 2W 5 N 0022EFE RNF1 2S1ROJ R301 Carbon film 2 2k ohm 1 6W 5 N 0216ECC RD16...

Page 51: ...n film 470 ohm 1 6W 5 N 0169ECC RD16U471J R354 _Chip 4 7k ohm 1 8W 5 ND 0247EBN ERJ 8GCYJ472 R355 Carbon film 33k ohm 1 6W 5 N 0324ECC RD16U333J R356 Carbon film 4 7k ohm 1 6W 5 N 0247ECC RD16U472J R3...

Page 52: ...81ECC RD16U103J R707 Carbon film 10k ohm 1 6W 5 N 0281ECC RD16Ul03J R708 Carbon film 180k ohm 1 6W 5 N 0387ECC RD16U184J R709 Carbon film 22 ohm 1 6W 5 RD16U220J R710 Carbon film 150 ohm 1 6W 5 RD16U1...

Page 53: ...cord Binder cord Cord AC Foot Snap battery w cable Speaker Strainrelief Line Cord Switch push Terminal solderless Wire Kit 3 Pin Male 4 Pin Male 2 Pin Male 3 Pin Male 2 Pin Male 3 Pin Male 9 Pin Male...

Page 54: ...369 26 Top PLL Shield B GE 86D 6373 27 Plate PLL Shield 0 VCO GE 86D 6528 28 PCB Ass y Loqic GA 86D 6318 29 Case Logic Shield GE 86D 6388 30 Top Logic Shield GE 86D 6389 31 Fiber Logic Shield GE 86D 6...

Page 55: ...ad GE 79D 0541 75 Screw Countersunkhead Machine HD 2585 CM3x6 76 Washer External Toothed Loek 3m m ETW3m m 77 Washer Internal Toothed Loek 3m m HD 8966 ITW3m m 78 Nut flange serrated 3DIA 79 Nut flang...

Page 56: ...DISASSEMBLV EXPLODED VIEW Remove four screws and detach the Cabinet CD 3 55...

Page 57: ...56...

Page 58: ...IN FM IF IN I r FM IF DC FEED 8ACK FM AC GND 2 r FM IF IN AM IF IN FM AC GND AM RF AGC FM BIAS FM IF DC AM Vee FEED BACK FM Vee AM IF AGC FM GND AM IF OUT FM AF OUT AM AC GND OUAD IN AM FM METER OUT...

Page 59: ...lOut o t K Control oOut ln ICS 6 lPC324C v OUT A A INPUT D iNPUT A INPUT D INPUT 1NP1J 1 v Rsc OUTPUT B INPUT B INPUT C INPUT OUT B OUT C 7f T IC7 TDA190S GND Ril VS GND BDOTSTRAP GND rHRESHOlD GND MU...

Page 60: ...INPUT 2 OUTPUT 3 GND ICg S 81250HG R4 ZI L _ 3 GNO DD0 123 IC301 MC145158 OSCIN l1 R EIIA8I E ose OUT V fv REF OUT osc1 11 ascOUT VOO fR REF OUT 14 PO OUT MODULUS eONTROL VSS ENABLE LD DATA fiN CLOCK...

Page 61: ...IC302 CX79258 Vss elK AMI AMI lAT VOD Vss FMI XI TV1 XD BD PO AD 1C303 TD6127AP IC304 TD6105AP LI U 5V I RFINPIJT 60...

Page 62: ...t i R6 L i 3 COMMON ICS01 SN74LS14S or HD74LS145 OUTPUT 0 0 OUTPUT 7 OUTPUT 3 OUTPUT 1 31 OUTPUT2 0 0 OUTPUT 4 0 OUTPUT 5 OUTPUT6 OUTPUT 9 ICS02 TDS2S04P 1I Ol 12 02 13 03 14 04 15 05 16 06 17 07 COM...

Page 63: ...I81 U t t t t r lld _O PREIZ181 TZ 181 DECODER IA I I B BIT RAil ROII I A U IACCUlIUUTOR Z56 BYTE INOEX I1 INDEX 819Z BYTE CONTRO AI8 1 REGISTER REGISTER COllMAND XI81 TI81 PRESCA R TIIIER X PREX 181...

Page 64: ...3D S29 COM CDU COll COll SI sa 3 2 I 0 LCD DRIVER DISPLAY DATA LATCH DSC WRITE COMMAND CONTROL DECODER _ OatCD unn N O I NNNNNNNNNN U en en fII en en en en en en UI en Yl c I Y c2 cu 519 Yl c3 5YNC 51...

Page 65: ...2 EMITTER 3 COLLECTOR 1 EMITTER 2 BASE 3 COLLECTOR 1 BASE 2 QLLECTOR 3 EMITTER F 2SC3358 G 2SK184 GR 1 2 3 3 2 4 c J E 2S01330 m9 1 2 3 1 BASE 2 COLLECTOR 3 EMITTER 1 EMITTER 2 BASE 3 EMITTER 4 COLLE...

Page 66: ...de Band Orange Cathode r 1i i BI 1S2076A Cathode Silicon CJ I Anode Cathode Band Navy Blue C SR1K 2 Cathode Silicon Anode 151 Band White 2nd Band White 0 1B4B41 1 1 I I I I 1 2 3 4 I 1 1 2 I 3 I 4 I I...

Page 67: ...range Zener Cathode Anode Type No Cathode Band Navy Blue GI 1T25 I Cathode I Anode El Hl 1SV89 Cathode Varaetor 2nd 3 d U9htBlu 1 lst Band Black 11 OA90 R Germanium 1 11 Cathode Band Whitel Cathode JI...

Page 68: ...I 9lA91 P37 SRDY RF filter switch P3 TXD RF filter switch PI3 RF fi Iter switch P34 RXD PI4 P33 CNTR PI P321INT2 P31 P3ct USA etc Cel lular switch INTI Reset CNV ss Input RESET XIN XOUT ct Low battery...

Page 69: ...ss 2 A2 23 P32 INT2 Hold Input 55 POl Memory address 1 A 1 24 P3l Sound Squelch Input 56 POO Memory address0 AO 25 P30 NC 57 P27 Memory 1 08 26 INT l 5 V 58 P26 Memory 1 07 27 CNVSS GND 59 P25 Memory...

Page 70: ...IS lil 39 40 L41 47PT ooPTlooPT 1OOP lTP IK C l ICl IC I IC ICl ICl Tiel S3 O PC I LAST NO 1 0 34 0 57 C 248 R Z58 L TI NOT USED 07 AI III CI a ISO 232 239 NOTES I ES ISTANCE V LUESIN OM SII IOOO 000...

Page 71: ...lEQL f R21Z Q23 n 25C24 IGR1 D C4 1I 1 J 1 1119 0 I I I OZT_ZO I 1 1S2076A e 4 16 200 r I III _ W MJ I OZT I r 0 12 i _ 1S2Q 715A ra J I i t i 13 H e 5 I D I 1I 1 02 1f i ri i OZ9 L I 5iJ fLil j l e...

Page 72: ...CN502 j I 2 1 3 lH 4 L Hl 5 lL H 11 IH R516 ff ffff li 560K Fr c 3 37 RS i OK l I I 1 1 I I I I 1 i I I 1 I I I RSle 47K I 11 R519 47K I 1 RS20 47K I I RS21 47K I R522 47K I J I lC502 bC503 ro OI r ol...

Page 73: ...8 N F I I I D B I 1 I 051S OS02 S09 SI5 152076 1 I 1 I I I I I I I I I I I I I I I I 1 I I I 1 1 I I 1 1 1 I I I 0506 1 I 1 0507 1 I I OS081 I I 05091 I I I OS041 I i I os051 1 I OS02 OS03 1 I I 1 R51...

Page 74: ...4 4 7K IC C64 1 0PICI 1 lCGa 10 001 R35 1 100 R353 470 R350 100 N o L31G 0 lOOp C361 2PIC 1 R347 8 2K R348 330 e35 0 001 I C41 1 3PtCI R346 1 1 00 052_ l r1C358 R345 0 001 0 001 470 C354 UI2 l 1 0PtCl...

Page 75: ...16 R318 14PlCI 220 I R321 I 100 R322 3 8 Cl2 C326 C327 C328 C329 lOOK fl IPICI IPICI IPICI 2PlCl Cl J C324 T IF l 327 I U28 l U29 330 l 4 _ I J O 5PtCI ICI Ir 0308 2S0358 R317 R319 100 471 0315 RNZOOS...

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