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Sams Commodore 1701, Technical Service Data

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Summary of Contents for Commodore 1701

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Page 2: ...OOLS TEST EQUIPMENT Digital Volt Oh m Meter High Voltage Probe CRT Tester Crosshatch Generator Degaussing Coil Item FX3201 CR3224 CR3231 CR3232 33 CR3234 IC2376 Q3208 R2125 RX3299A Part No 136 113 23 103 330 103 315 06 103 315 06 103 315 06 221 179 01 63 09063 02 95 3603 01 TOOLS Phillips Screwdriver Low Voltage Soldering Iron Desoldering Tool PARTS LIST AND DESCRIPTION Description Item Part No_ A...

Page 3: ...ator to the Video Input 75 Ohm Jack P7 Rotate Service Plug A1 90 degrees to Color Set Up position Adjust APC Control R2390 for MIN IMUM movement of co lor Return Plu g A1 to Normal position RGB CUTOFF ADJUSTMENT Preset the Red R2505 Green R2516 and Blue R2527 Cutoff Controls for MIN IMUM Adjust Screen Co ntrol RX3499B until a dim raster appears Adjust each Cutoff Control until a gray raster is obt...

Page 4: ...CONNECTING DIAGRAM VI PRELIMINARY SERVICE CHECKS Continued I Y R344 I HOAIZCWTAl 58 CfHTERIN6 01 J C 1 E I X I I Ilrh L LL l IL lAIN BOARD R2125 VERTICAL t CENTERIN6 fi _ CR3224 r 26 9V 3V3 3W3 I I IS4V I f J SOURCE T3201 p 0 SWITCH AND VOLUME CONTROl MOUNTIN6 BRACKET swITCH VOlt t 2A3 C FOCUS 3S3 1 HV HORI ZONTAL SWEEP SOARD _ fll J l 3R3 L t t t J TP3 PIA P2 t 1 I TES TI E POINT WIDTH f 5A BOARD...

Page 5: ...ICE CHECKS Continued AUDIOIVIDEO SYNC BOARD IV PRELIMINARY SERVICE CHECKS Continued PIN1 IC2376 0 Y R2390 APC AJUS 1 RH08 RtD CUTOFF R1714 I lLUt CUTOFF Al StHVICE PL UG AUDIOIVIDEO SYNC BOARD V 3 o eN mm z N 4 3 C1 I ...

Page 6: ...FF P7 VIDEO OUTPUT BOARD 082 PGB IN SW001 f3C GREENIWHITE SWITCH SW170 f2i0 RGB COMP V SWITCH MAIN 1F BOARD R2516 GREEN CUTOFF f 1 I rl VERI CI NTERING A2125 R3233 CR3234 CR3231 CR3232 26 9V A 2f CA3224 120VAC 4A AC C FUSE 1 P1A WIDTH P2 BOARD Q3208 HORIZONTAL 10 OUTPUT VI f1 2 HORIZONTAL SWEEP BOAR tJ JJ m I s z JJ CJ m JJ C m C m C CJ C o s J C I Q tJ JJ m I s Z JJ CJ m JJ C m C m C CJ C o J s c...

Page 7: ...ck Assembly 7 HV Hori zontal Sweep Board 17 18 32 Power Supply Terminal Guides TV Service Information Servicing in the Field Troubleshooting Troubleshooting Aid Howard W Sams CO Inc 2 47 48 49 5 45 41 42 40 4300 West 62nd Street P O Box 7092 Indianapolis Indiana 46206 U S A The listing of any available replacement port herein does not Reproduction or use without express permissi on of editori al o...

Page 8: ... IIlK CR3210 J7T112 PHOTO CIACUITRACE SCHEMATIC CIRCUITRACE r t Iii IIH oi R710S SHARf Hf55 9 I 5 I 3 I R3 of ot5 2200 10 5000 11 1IV R 102 4 BlACK LEVEl 11 IV em 5000 R22 8 1800 S iY R2255 3300 BUIST Q2215 GATE IV R2285 10K 12 OV IB 99 1 QI 30 VIDEO r R71 01 PICT H 99 1 Ql 734YI O APP 499 1 A Rl 768 751 Q1729 YIDEO A1 P RI767 300K R23 8 8200 Rl770 1000 11 1V Rl 69 m R23S TIl 5 IN ORMAL i I I SInS...

Page 9: ... C lJ J s 1 1 10 IIf IIT 1r AW O I C ot OSJTf VIDEO JIf IIT SYNC JIf llTS v O o AI P _ _ L CHK IA l t tIlNAHCf lEE fLUf I T NIl 5TAItlAROJ 5T _P ARD fLUE r APPlf GREfH r STAM AAQ ilI N IIf IIT CAPf lf J _ GRfEN _ _ ...

Page 10: ... check for a shorted Switch Transistor OX3202 If the shutdown circu it is not worki ng properly check the voltages and components associated with Shut down Transistors OX3202 03204 and 03207 See the Shutdown Voltage Chart for voltages measured with the moni tor in shutdown SHUTDOWN VO LTAGE CHART NOTE Vol tages are measured with moni tor in shutdown cuit The shutdown circuit also monitors Transfor...

Page 11: ... t VIDEO AMP CR130 1 AUUIU A 11l55 INPUT PANEL ASSE MBLY I j VIDEO HI Z VIDEO 5 OHM AUDIO OUT TOP VIEW AUDIO IN 0 A9S22 0S CONTROL BOARD BLACK LEVEl TINT PICTURE LOR LEVEL SHARPNE SS GREEN RGB Cj W HITE COMP BRIGHT RANGE 9 m SA MAIN BO ARD C R3405 C R2104 CR11 06 CR3406 t 210 D l lHORIZ CENTER IC3401 2M o VERT HORIZ CR 04 PROCESSOR C R21 99 r l CR 34DI LJ L 0 3401 I Q 2101 CR1105 5M VERT OUT J CR ...

Page 12: ...o TP3 pin G of Horizontal Output Transformer TX3204 Adjust 95V Adjust Control R3409 for 95V PURITY ADJUSTMENT If the CRT appears to be magnetized use a degaussing coil to demagnetize the CRT and mounting brackets If neces sary perform center convergence Before proceeding with the purity adjustment the Screen Control RX3499B must be adjusted Set the Color Level Black Level and Picture Controls to M...

Page 13: ...an AC voltmeter having 5000 ohms per volt or more sensitivity in the following manner Connect a 1500 ohm 10 watt resistor 63 10401 76 paralleled by a 15 mfd 150V AC type capac itor 22 4384 between a known good earth ground water pipe conduit etc and the exposed metallic parts one at a time Measure the AC voltage across the combination of 1500 ohm resistor and 15 mfd capacitor Reverse the AC plug a...

Page 14: ...n the part number of the capacitor should be exami ned If it is the 22 7233 type used in E and F model lines only that capacitor must be replaced with an improved recommended type 22 7504 01 Please refer to Zenith Tech Topics I ssue No 87 for the detai ls Your distributor will answer any questions or you may write to Zenith for further details SUBJECT TIPS ON PROPER INSTALLATION 1 Never install an...

Page 15: ...AUDIOIVIDEO SYNC BOARD 10 C BE 01713 E B C 01707 C B E Q1745 C B E 01744 AUDIOIVIDEO SYNC BOARD 39 3 o eN mm r z N 4 3 I Cot 11 ...

Page 16: ...OARD 12 A B C D E F G H K L M o p Q R S T D J o p Q s 4 I5 I6 I7 I8 I9 110 III 112 13114115 116117118 19120 121 1221 23 241 25126127128 T A Howard W Som s liU i m Photo AUDIOIVIDEO SYNC BOARD 37 s o ON mm r Z N I s w U1 ...

Page 17: ..._ 12 9V II II A Howard W Sams iil Jillii t i3i Photo 3 o eN mm r z N 0004 3 I MAIN BOARD 13 ...

Page 18: ...MAIN BOARD 14 12 0V CBE 03202 128V A 26 9V A A Howard W Sams 13 iil f S3i Photo B E02102 C 186V ...

Page 19: ...A B C D E F G H J K 1 2 3 4 5 6 7 8 9 10 11 1 2 3 4 5 6 7 8 9 10 11 A Howa rd W Sams li ill nn Pho to A B C D E F G H J K 0 3 t N 3 0 ON mm z N I 3 Co U I MAIN BOARD 15 ...

Page 20: ...Em VIDEO OUTPUT BOARD 16 A Howard W Sama illii i3M Photo ...

Page 21: ...A Howard W Saml Gilii 3 Photo 3 o eN mm z N f 3 I w U1 HV HORIZONTAL SWEEP BOARD 17 ...

Page 22: ...64 R3279 R3282 R3299A R3299B RX3206 RX3208 RX 3210 RX3211 RX321 3 C 7 C 8 G 7 D 4 F 8 G 4 D 5 E 5 D 3 E 4 F 4 E 4 F 3 G 2 F 1 N 9 J 1 8 8 K 8 D 9 E 7 H 8 C 7 0 5 G 5 E 3 G 1 G 9 E 6 F 6 E 9 G 4 1 2 J 7 0 9 A 7 E 4 G 6 A 5 A 2 G 8 E 6 F 2 E 2 D 7 C 6 C 8 C 8 G 7 E 8 G 8 F 2 E 1 E 3 F 4 G 10 F 1 G 1 M 1 H 9 A 9 A 4 A 1 A 1 H 9 E 9 F 5 L 1 L 1 J 8 E 7 L 8 C 5 C 5 RX 3214 RX 3215 RX3216 RX321 7 A B c ...

Page 23: ...A How ard W Sams iliI I i1i1 f i3i Photo ro j CONTROL BOARD 19 s o eN mm r z N f s I Co C11 ...

Page 24: ...301 13 GElO 9 1 NTE139A ECG139A SK9V1 139A WEP11 09 139 103 301 13 CR I726 ITT1 42 10 3 142 01 GE 300 NTEI 77 ECGI 77 SK9091 1 77 WEP1062 177 103 142 0 1 thru CRI728 CR2104 R142 103 142 0 1 GE 300 NTE 177 ECG I 77 SK9091 177 WEP I 062 1 77 103 142 01 CR2105 254GI 10 3 254 01 GE 5 04A NTE 116 ECG 1 16 SK3313 116 WEP158 11 6 103 254 01 CR2106 7 H254E 4 103 254 0 1 GE 5 0 4A NTE11 6 ECG116 SK3313 1 1...

Page 25: ...CEMENT DATA NEW TONE PHI LI PS NTE ECG RCA PART No PART No PART No NTEI77 ECGI77 SK9091 177 NTE 177 EC GI77 SK 90 91 177 NT E 177 ECG17 7 SK90 91 11 77 NTE 177 ECGI 77 SK9091 1 177 NT E 177 ECGI77 SK909 1 1 1 77 NTE 177 ECGI77 SK9091 1 77 NTEI 77 ECGI 77 SK909 1 17 7 NTE 525 ECG525 SK3925 525 NTE 5019A ECG50 19A SK10A 501 9A NTE 5 52 ECG552 S K9000 55 2 NTEI 77 ECG177 SK9091 177 NTE 177 ECGI77 SK9...

Page 26: ...6 1096 121 1096 Q1727 895 121 695 GE 123AP NT E12 3AP QI726 1064 1096 121 1096 Q1729 3 0 499 1 1 2 1 499 1 GE 123AP NTE123AP Q1731 thr u 1019 121 1019 62 NTE 159 Q1733 Q1 734 49 9 1 12 1 499 1 123AP NTE1 23AP Q1735 1019 121 10 19 GE 62 NTE 159 REPLACEMENT DATA PHILIPS ECG RCA WORKMAN ZENITH PART No PART No PART No PART No ECGI77 SK90 91 177 WEP1062 177 103 142 01 ECG177 SK909 1 177 WEP 10621177 10...

Page 27: ...T No PART No NTE 159 ECG159 S1 3466 159 NTE 229 ECG229 SK3246AI229 NTE123AP ECG12 3AP SK3854 1 23AP NTE 159 ECG1 59 SK3 466 15 9 NTE123AP ECG1 23AP SK3854 1 23AP NTE291 ECG291 SK34 40 291 NTE 12 3AP EC G123AP S1 3854 12 3AP NTE 159 ECG159 SK3466 159 NTE 159 ECG159 SK3466 15 9 NTE159 ECG159 SK3 466 159 NTE229 ECG229 SK32 46A 1229 NTE 159 ECG 159 SK3466 159 NTE 229 ECG229 SK3 246A 229 NTE 159 ECG159...

Page 28: ...23AP SK3854 123AP ECG165 SK3 11 5 165 ECG123AP SK3854 123AP ECG123AP SK3854 123AP ECG 159 SK3466 159 ECG123AP SK3854 123AP ECG123AP SK3854 123AP ECG123AP SK3854 123AP EC G171 SK3201 171 ECG1 23AP SK3854 123AP ELECTROL YTIC CAPACITORS Item numbers not listed are normally avaI l able at local dIst rIbu tors ITEM RATING No C120 1 1 50V C1702 2 2 25V C3 25 4 22 100V C3402 1 35V C3410 22 16V NP t P NP ...

Page 29: ...CX3258 I 100V 5 01 2KV 530 N2200 01 2KV 530 N2200 0165 0047 500V I 125VAC CONTROLS All wattages Y2 watt or less unless listed ITEM FU NCTION RESISTANCE MFGR NO PART NO R1400 Vo lume 15K 63 10772 04 1 R1708 Red Cutof f 5000 63 10857 11 R1714 BI ue Cutoff 5000 63 10857 31 R1832 Black Level 2000 63 10857 86 or Reference 63 10857 88 R1836 Black Leve l Cutoff 30K 63 10857 15 R2125 Vert Center Ing 500 6...

Page 30: ...R3231 1 10 2 11 II ll 63 10422 24 2 11100 R3239 1 10 3 11 II ll 63 1 0852 ll R3240 18 10 3 11 II ll 63 1 0852 01 ll R3241 4 10 10 11 11 1 63 08246 10 11309 R3243 2200 5 1 2 11 Carbon Film 63 10243 80 HW 222 R3244A 47 10 3 11 11 1 63 10430 64 1 47 5 3 11 Carbon Film 63 1 0840 40 R3245 PTC 11 Cold 63 10 71 0 778413 1 R3261 3 10 5 11 II ll 63 1 0444 86 5 111 39 R5101 2000 5 3 11 Carbon FIl m 63 10840...

Page 31: ...DY1 Y oke Hor lz 1mH HE 234 547 or 90 Vert 27mH HE 234 455 L3402 Sweep Osc I I Iator 20 4026 LX3261 Wi dth 20 3976 T3201 Start Up 95 3558 03 T3205 Horlz Driver 95 3344 TX3202 Regulator 95 3502 02 TX3204 Hor Iz Outp ut 95 3603 01 TX3251 Pincushion 95 3389 06 I For SAFETY use only eq uivalent replacement part FILTER CHOKE FUNCTION RF Choke 663uH RF Choke IOuH RF Choke 10uH RF Choke 1OuH Peaking 8 2u...

Page 32: ... II Ferrite Bead Ferr Ite Bead Ferri te Bead Power Cord Switch Switch Switch Switch an P C Board P C Board P C Board P C Board P C Board P C Board P C Board Power Cord Power Cord Socket 1 Number on unIt 28 MFGR PART No 103 15201 52 2240 08 52 2240 06 52 2240 06 52 2240 06 149 454 A 11847 85 1628 63 10766 01 M33AAWOOX02 1 HE 234 547 or HE 234 455 9 230 5 1 A 9522 05 1 204 840 03 9 247A 1 9 227 5A 1...

Page 33: ...Iate 12 8215 Knob Assembly Volume A 08846 Perforated Bottom Pl ate 12 8416 Knob On Of f 49 1332 Knob RetaIning SprIng Volume 80 02166 WIRING DATA High Vo ltage Lead Use BELDEN No 9867 30 KV Shi e lded Hook up W ire U se BELDEN No 8401 or 842 1 S ing le Conductor 8208 Two Conductor General use Unshi e lded Hook up W ire Use BELDEN No 8529 Sol id Ava i lable in 13 Colors 8522 Stranded Avai lable in ...

Page 34: ...01 N _ J WIDTH BOARD A Howard W Sams 11 13111 31 Photo 30 ...

Page 35: ...A Howard W Saml i lailiii s31 Photo R3240 TX3202 HORIZONTAL OUTPUT BOARD 31 s o ON mm z N s X w U I ...

Page 36: ... E r _ B03204 C HV HORIZONTAL SWEEP BOARD A Howard W Saml tj1 14iiiili4i Photo 32 ...

Page 37: ...115 8 8 5C2 D ll C5105 A 7 L5105 J 2 R5105 C l0 R511 9 C 8 5H3 G 2 C5106 8 7 L5106 C 5 R51 06 E 4 R5120 J 2 5X3 F 2 C5101 1 3 L5107 D 5 R5108 E 5 R51 21 C 5 C5102 E 7 05101 J 3 R511 0 D 3 R51 22 D 6 C5103 G 3 05102 A 4 R5111 C 9 R51 23 A 8 1 2 3 4 5 6 7 8 9 10 11 A A B B C C D D 3 E E 0 ON mm z F N F 0004 3 1 eN G U1 G H H J J K K L rr L 2 5 2IJ 12 1 2 r3 4 5 6 7 8 9 10 11 A Howard W Sams lco jj U...

Page 38: ...6 LX3202 8 10 R2540 H 2 R3452 J l C3409 0 4 02101 E 6 R25 42 1 5 R3453 0 2 C3410 C 6 02102 C 8 R2544 1 4 R3461 F 2 C3411 G 8 02103 D 6 R2546 J 2 R3462 E 2 C341 2 8 5 02104 F 5 R25 48 J 3 R3463 E 3 C3413 A 4 02501 H 4 R2549 J 2 R3465 F l C3414 0 3 02502 J 4 R2550 J 5 R3466 G 2 C3416 8 5 02503 H 3 R2552 J 4 R3467 G 2 C3419 C 4 02504 J 3 R2554 J 2 R3468 F 2 C3420 G l 02505 H 2 R3201 G 3 R3469 F l C34...

Page 39: ...MAIN BOARD 35 ...

Page 40: ...1 786 R 22 LX1705 L 27 R1706 L l0 R1788 G 26 R2378 P 18 C1858 H 22 LX1706 J l0 R1707 P 26 R1789 H 18 R2379 5 21 C2215 T 1 5 01202 L 5 R1708 N 28 R1791 J 17 R2381 T 26 C2251 N 15 01203 M 6 R1709 M 26 R1792 G 18 R2383 5 26 C2257 0 16 01204 N 6 R1710 P 26 R1793 E 1 9 R2385 R 20 C2278 P 14 01701 N 3 R1711 K l1 R1794 F 18 R2387 R 26 C2281 P 17 01702 M 26 R1 712 N 26 R1795 B 16 R2388 N 22 C2282 0 1 8 01...

Page 41: ...AUDIOIVIDEO SYNC BOARD 38 A Howard W Sams Ii Ai Il f i3i Photo AUDIOIVIDEO SYNC BOARD 11 3 o ON mm z N f 3 I ...

Page 42: ...N D Refer to Troubleshooting Horizontal circuit NO VERT DEFLECTION Refer to Troubleshooting Vertical circuit POOR VERT LIN OR FOLDOVER Refer to Troubleshooti ng Vertical circuit POOR HORIZ LIN OR FOLDOVER Refer to Troubleshooting Horizontal circuit NARROW PICTURE Refer to Troubleshoot ing Horizontal ci rcuit VERT OFF FREQUENCY Refer to Troubl eshoot ing Vertical circuit HORIZ OFF FREQU ENCY Refer ...

Page 43: ... TX3204 and may be defective Poor horizontal linearity or foldover may be caused by the condition of Capacitors C3221 CX3211 CX3223 CX3229 and CX3227 and Diodes CR3211 B and CR3212 If the horizontal sweep is off frequency check the sweep osc illator circu it at pins 23 24 and 25 of IC3401 and check the adjustment of the Horizontal Oscillator Coi l L3402 VERTICAL No vertical sweep Check voltages wa...

Page 44: ...wave forms and components associated with Intensity Transistor 01736 IC1702 and associated circuitry RASTER Check the CRT and CRT voltages and waveforms If the raster is magenta check voltages waveforms and components associated with the Green Output Transistor 05103 and pin 6 of the CRT 42 If the raster is yellow check the voltages waveforms and components associated with the Blue Output Trans is...

Page 45: ...8K 94 01736 IllF 6020 94 03202 INF 0170 231a 7ull 6590 01737 609 2240 0 03203 911 01709 2325 7590 6590 01 38 294 609 1102 03204 407 01710 232 7586 b590 01739 7521 1102 94 0320ti 0 017 11 1699 8577 6588 QI740 566 1520 3130 Q3207 468 01712 1683 8607 6594 01711 35 3 8128 659Q 3208 I 01713 1683 8560 6590 01742 7848 714 8384 03209 0 01714 115 9247 659U Q1743 2360 8380 6590 03401 1000 OlliS 1180 9279 65...

Page 46: ...NT VIEW WIRING VIEW ill H I I 1m I 1 0 2 0 1 0 1 0 J 0 1 0 C 0 WIRINGVIEW 3T8 3R8 X Y 3F3 3V W IRING VIEW W IRING VIEW WIRINGVIEW eR PN 18 Iffi os ML0 1 0 T K0 2 0 oy J 0 0 2A3 3B9 3R3 3S 3 WIRING VIEW WIRING VIEW TX3204 l tQ BOTTOM VIEW 2 0 m SH3 WIRING VIEW WIRINGVIEW E B C QSIOI THRU Q5103 FRONT VIEW r INDEX I I I HOLE I I m m ill 2 I 3 2 0 Z 0 2 0 4 0 3 0 3 0 3 0 4 0 4 4 0 5 6 E 5 0 5 0 WIRING...

Page 47: ...nect HV anode lead degaussing coi l Connector 3T8 deflection yoke Connec tor 3S3A and 2A3 speaker Connector 4P4 front panel co ntrol Connectors 3S8 TP7 2A7 and 2B7 Remove four screws holding cabinet front to chassis Disconnect Power Indicator Connector Z and remove cabinet front from set Remove four screws holding CRT to chassis Disconnect ground connectors and lift CRT from set SERVICING IN THE F...

Page 48: ...RES C3201 1 100Y R499 01C Q3201 VOlT RES 9 e 1064 R3202 120 _ 2 C3247 680 lf 3_ r _ __ __ _ __ _ __ __ __ _ _ __ _ __ _ __rn 2 VCID 3 L3401 SOURCE CR3219 33061 CR3223 330G 6 I IV CR3202A 33061 L2501 L _ 3 RCE e R2299 51 lOW C 1 2 IV SOURCE 1 IV SOURCE 12 OVW SOURCE 2 OVCID SOURCE 2 0V SOURCE 1 IV SOURCE 11 IVW SOURCE 11 IVCID SOURCE 8 V SOURCE Rl106 2 QI728 VOl T RE S_ ___ __________ ___________ _...

Page 49: ... 11 9Y 11 W 11 9Y R5105 100 e T11088 05102 RED OUTPUT l5106 L __________________________________________________________________ R5119 10 11 I I RI833 10K I1 IY 8 I 5 I CR1703 ITTl042 e C304SO 200pF Nt Nt ov R304S2 6Boo R895 030405 CUTOFF 1 9Y 12 I RIS10 100 R1812 3000 13 I 48 II lIT FOR TERMINAL GUIDES AND NOTES PHOTO CIRCUITRACE SEE PAGE 5 44 SCI HATIC CIRCUITRACE 1019 01 3 CUTOFF 9 I RI816 B 2O...

Page 50: ...logic probe readings to isolate defective circuitry and components LOGIC PIN Ie Pi N IC PIN IC IC IC IC IC IC IC IC NO Ul00 NO Ul00 NO UI02 Ul03 Ul04 Ul05 Ul06 UI 07 Ul0B UI09 1 p 21 P 1 L L L L L L L L 2 P 22 P 2 P I p p p p p P 3 P 23 P 3 H H H H H H H Quick ComRonent Location using the SAMS exclusive GRIDTRACE CiRCUITRACE and component photographs J K ComRlete Components Parts List in an easy t...

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