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Atari SM124, Service Manual, Page: 18 / 33

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Atari SM124 Service Manual Download Page 18

 

Summary of Contents for SM124

Page 1: ...PECIFICATIONS 3 ADJUSTMENT AND MAINTENANCE 3 THEORY OF OPERATION 5 BLOCK DIAGRAM 8 TIMING CHART 9 TRANSISTOR IC BASING 10 VOLTAGE CHART 11 COMPONENT OF P C B 13 TROUBLESHOOTING CHART 16 REPLACEMENT PA...

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Page 3: ...he cabinet back and ad justing the centering tabs on the neck of the tube located at the rear of the deflection yoke Turn the whole device clockwise or counter clockwise To increase the amount of rast...

Page 4: ...b 1 5 mm max fa v a I a a 3 0 mm max a a b 2 0 mm max d TRAPEZOID 1 i 1 1 i 1 c c 1 5 mm max ____04 d d 1 5 mm max 1 1 1 1 1 I I d 4 t b b 2 0 mm max PARALLELOGRAM YORK TILT Active video CRT Fig 2 Geo...

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Page 8: ...NC 71 2Hz VIDEO INPUT VERT OSC VERT AMP VERT OUTPUT 12V GND 12V GND 12V REGULATOR HOR SYNC 35 7KHz VIDEO AMP CONTRAST BRIGHTNESS MONO STABLE CIRCUIT VIDEO OUTPUT V Dy ASTABLE CIRCUIT HORIZ DRIVE CRT H...

Page 9: ...25pS VIDEO BLANK V SYNC VIDEO BLANK 111 35pS 0 1 20pS 0 5pS 01 3 5pS 01 14 0845mS 1 50S H 1 41 1Lines 4 0 0281mS 0 9558mS H 34 Lines 500 Lines 14 056mS O 506mS 0 84338mS 30 el 1 855mS 400 LinesHe 66 1...

Page 10: ...S 5uS 7uS 4 5uS 15 75KHz 63 5uS VERTICAL TIMING VIDEO 1 396mS ill 1 1134mS 12 7mS 1 41mS 0 19mS SYNC 0 19mS 04 4 1 016mS 60Hz 16 69mS 108 NOTES 1 SIGNAL INPUT LEVEL 1Vp p 2 TIME TOLERANCE 0 1 3 THE MO...

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Page 13: ...COMPONENT OF P C B 10 V4 i4 57 07 1 yr CAI c71 R724 R7Z7 4 VR 03 FOCUS _R305 th moo _ SU6 MGM kMIZKV 7 MtrirsTr CONTRAST RIM VOW VitiO3 MAIN P C B COMPONENT SIDE 1 1 A 1 7...

Page 14: ...MAIN P C B SOLDER SIDE 14...

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Page 16: ...RT MAIN CHART IPlease Check the Monitor and the PC how to Connect exactly Go to POWER chart Yes Go to VIDEO chart Switch ON monitor then check it after 15 miuntes No Go to SOUND chart Good Please retu...

Page 17: ...e F901 Replace AC fuse Yes Trouble in D901 D904 Yes No or Weak Check inpu t of IC901 22V DC7 Yes Check PS P4 of power PCB Yes To the main chart Check output of IC901 PIN 2 of connector P901 Replace IC...

Page 18: ...heck Video circuit Check Hor circuit Check Vert ircuit Trouble in FBT Check 3 of P301 1 6Vp p Yes Check 5 or 9 of IC302 SVP Pi Yes Trouble in Signal Cable Check 48 or 6 of IC302 Check cathode of CRT P...

Page 19: ...Mo itor and PC Power is ON7 TYes Check connector P901 Yes Check connector P402 To the Power chart Normal 1 Yes Trouble in connector P901 Check connector P401 Yes Trouble in connector P402 Trouble in...

Page 20: ...16 C310 709 0 001 C309 NH C305 0 001 22 16 i3 R310 1K in C312 C306 0 001 22 16 0 303 KTC2229 0 302 11309 BSX20 75 1C302 SNUCK C311 0 001 C307 220 16 4R31 1147 R302 0313 1K 0 001 1314 0 001 R312 240 L...

Page 21: ...VERTICAL DEFLECTION CIRCUIT O 5 0Vp p 11 71 43Hz 0 6 68V 0 0 7Vp p 71 43Hz O4 0Vp p 71 43Hz O 4Vp p 71 43Hz 0 4 7Vp p 71 43Hz 21...

Page 22: ...11 92V O 2 1Vp p I 71 43Hz nn inn c n 12Vp p 71 43Hz 13 0 85Vp p 71 43Hz 2 5Vp p 71 43Hz 14 22Vp p 71 43Hz 22 0 24Vp p 71 43Hz J Ir 0 7Vp p 71 43Hz...

Page 23: ...Ka1555 C706 68P R108 111116 R709 1 2K6 0194 Kos1555 11711 t2K6 708 0 0016 C709 0 001 1 R715 tin R114 100 11713 Z2K6 Ara 710 0 1 11716 1 0 10151555 8717 t 10K Y R718 UK 150 11 2M C711is 4 7 50 A C712 2...

Page 24: ...5Vp p Y 35 7KHz 9 0Vp p V 5 35 7KHz 74N 8 0Vp p 35 7141 Hz 35 7KHz 0 7Vp p O 35 7KHz 7 2Vp p 4 35 7141 Hz 24 2 3vp p 35 7KHz 6 8Vp p O 35 7KHz aa 7 0Vp p 35 714KHz...

Page 25: ...KHz 4 71Vp p 13 35 714KHz Ermt islivN z 38Vp p 35 714KHz r 6 1 1 7 0Vp p 1 21 35 714KHz A 14 180Vp p 35 714KHz 36Vp p 35 714KHz 0 69 5VDC 0 28 8VDC nr 17 1 0 7Vp p 35 714KHz 56Vp p 35 714KHz 0 11 8VDC...

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Page 29: ...D 341 068A LUCKY ABS AF 303 1 6 HOLDER LAMP 341 238A LUCKY ABS AF 303 1 7 CHASSIS MAIN 311 486A 1 8 METAL VOLUME FIXING 430 273A 1 9 PLATE ASSY HEAT SINK 407 385A 1 10 METAL SIGNAL POWER 430 268C 1 11...

Page 30: ...0P SOOV I R728 o 33K 0 1 SG701 Nada 1601 P701 0 0 7 0 7 0 07 0 0 C610 2200 16 601 0 16 R615 3 3 R721 120 11 2111 0709 ROAM 1701 33011 12701 120 11 2161 702 720 16 a a 701 220 16 R703 330 11 216 703 22...

Page 31: ...REVISED AUDIO CIRCUIT SM124 MONITOR 12V i000ufI1SV VR tOK 390K 11 10uf 0 16V 150ohri 3K3 Q401 R404 R405 1 630ohm R406 4 630ohnt Q402 Q403 Chassis MT 21...

Page 32: ...220 COITRAST ACC Darr FC30 321 47u 16V 8318 100 R715 SL 3 V1 47X V27 2 1 3 DiPr RTINT SAFETY IICTICE VALID AREA DI TrilS ZIAGIAM 11 a TE SF r EATL RE 3 1MPCRTANT Tr R FROTECTIDI X RAV ATIC F 17 E iC 0...

Page 33: ...yot now 4 2 0000 202 Me U LAS 46 60 X6 10002 OOP 20242 2004 A 42 rt 10 ft 0 7 aL 1 79726 Clvb 2221 Oft vitt A 022 601 2 tea 001 KW Et 26 111 2099 060 2202 I I 918r15 Ott X t 2002 eoeo e o o 4 4 dit 1...

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