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Tektronix TDS 520, Руководство по диагностике и ремонту


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Содержание TDS 520

Страница 1: ...perform any servicing unless you are qualified to do so Refer to the Safety Summary prior to performing any service Please check for CHANGE INFORMATION at the rear of this manual Part No 070 8313 00 P...

Страница 2: ...an often be done very reasonably in consideration for adding your manual to our library Typically the scans in our manuals are done as follows 1 Typed text pages are typically scanned in black and whi...

Страница 3: ...GIVEN BY TEKTRONIX WITH RESPECT TO THIS PRODUCT IN LIEU OF ANY OTHER WARRANTIES EXPRESS OR IMPLIED TEKTRONIX AND ITS VENDORS DISCLAIM ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICU...

Страница 4: ......

Страница 5: ...2 Figure 9 16 TP904 PC1 Vol 2 9 8 Vol 2 Figure 9 17 TP905 PC2 Vol 2 9 8 Vol 2 Figure 9 18 U601 pin 3 PC7 Vol 2 9 8 Vol 2 Figure 9 19 Analog Holdoff Trou shC oting Procedure Vol 2 9 9 Vol 2 Figure 9 2...

Страница 6: ...quisition Waveforms Vol 2 9 40 A11 DRAM Processor Display Vol 2 Figure 9 50 Bdsack Troubleshooting Procedure Vol 2 9 42 Vol 2 Figure 9 51 BootROM Control Troubleshooting Procedure Vol 2 9 43 Vol 2 Fig...

Страница 7: ...et Vol 2 9 70 Vol 2 Figure 9 88 Kernel Dsack Signals Vol 2 9 71 Vol 2 Figure 9 89 Kernel Dsack Troubleshooting Procedure Vol 2 9 71 Vol 2 Figure 9 90 Kernel RAM Troubleshooting Procedure Vol 2 9 72 Vo...

Страница 8: ...24 Front Panel LED Test Loop Troubleshooting Procedure Vol 2 9 101 Vol 2 Figure 9 125 Front Panel Mux Test Loop Waveforms Vol 2 9 102 Vol 2 Figure 9 126 Front Panel Mux Test Loop Troubleshooting Proce...

Страница 9: ...Q6 Gate Drive Wavefonns Vol 2 9 122 Vol 2 Figure 9 145 FEr DRIVE Wavefonn Vol 2 9 122 Vol 2 Figure 9 146 Low Voltage Power Supply Troubleshooting Procedure Vol 2 9 123 Vol 2 Vol 2 Figure 9 147 Main C...

Страница 10: ...rter Control Waveforms Vol 2 9 138 Vol 2 Figure 9 162 A19 Power Factor Control Board Vol 2 9 139 A19 Power Factor Control Component Locator Vol 2 9 140 A20 CRT Driver Vol 2 Figure 9 163 Display Distor...

Страница 11: ...A10...

Страница 12: ...dure No There is not a prOblem with the A15 AttenuatOf Board Programming TDS 520 Component Level Diagnostic and Repair Manual Do the signals look like those shown in Figure 9 1 Scans by Artekmedia 201...

Страница 13: ...ing SOlXce or the trigger hoIdoff is too long No the SROA Sf 2A SROB SR2B and HOLDOFF1 4 signals co see Tables 9 1 and 9 2 Check and repair Ul551 U1552 and associated circuitry Is the data correct See...

Страница 14: ...ll Other Combinations Vol 2 Table 9 3 Trigger CD Signal BH nigger Mode 7 6 5 4 3 2 1 DC 0 0 0 0 o o o AC HF Reject 0 0 0 0 o 0 IF Reject 0 0 0 o o o IF Reject 0 0 0 o 0 HF Reject 0 0 0 o o o AC HF Rej...

Страница 15: ...4 01 Bus board ooonections and USOO The Acquisition PI stY Is ok IDS 520 Component Level Diagnostic and Repair Manual I U600 pin 8 at 5V and U600 pin 7 at g No Ched and repair the associated circuitry...

Страница 16: ...ify the oscilloscope setup pins 23 24 82 and 83 01 the AID converter 250 MHz ECL clocks Replace the NO converter No Perfoon the Clock System troubleshooting procedure TOS 520 Component Level Diagnosti...

Страница 17: ...and associated components TDS 520 Com ponent l evel Diagnostic and Repair Manual No y Do the voltage at U900 pin 9 chance about every 60 ls and stay within the 10 24 V range Ye Check and repair U905...

Страница 18: ...1 Stopped 15 Acquisitions I I i 1 _ _ J I T en l 2 00 V r i I r 1 1t tHL t _H_ i uujJ 11 1 J 84m Vol 2 Figure 9 10 TP906 pe3 _ TP907 PC4 and TP90B peS are similar Stopped 80 Acquisitions I r f T j l _...

Страница 19: ...lJ lS 1 M10 0 0j t Ch1 J 2 24 mV I Vol 2 Figure 9 16 TP904 PC1 Stopped 64 Acquisitions Chl 2 00 V T f I t 6 iioi as til 44 15 r t _ J 1 O l106 o j Ch l I 224mV I Vol 2 Figure 9 17 TP905 PC2 Scans by A...

Страница 20: ...and UI 5018 to MTHO Check and repair 01543 01531 RI 54S UI502 and associated circui1ly NO Iu both the slow range 10 ms and the fast range 10 ms ok MTHO toggles in the No Check and repair the HOLDOFF4...

Страница 21: ...1s 1000 JIs 10000 j ls 50 s 500 jJ s 1000 j lS 20 s 200 jJ s 1000 IJ S 10 IJ s 100 jJ s 1000 J 1s 5 S 50 J 1s 100 J 1s 2 s 20 s 100 IJ s 1 J Ls 10 J 1s 100 J ls 500 ns 5000 ns 10000 ns 200 ns 2000 ns...

Страница 22: ...in 12 01 Trigger A the proper ampitude and frequerlC N o the trigger select N O I Check and repair the control circuitry Ones correct see U620 U621 and U628 and the connection Is Ul 552 pin 16 0 0 V 1...

Страница 23: ...o the start of this troubleshooting procedure Remove Pl200 I the center conduct 01 Pl 200 a 50 mV 1 MHz sine wave No r Repair the A15 Attenuator Check and repair the AID Converter reference voltages a...

Страница 24: ...ove Pl100 Return to the start of this trouble hOOting procedure Is the center No oonductof 01 Pl100 a Repair the A15 50 mV MHz sine Atlenualor wave Check and repair the AID Converter reference voltage...

Страница 25: ...log DA C Control troubleshootng pnx edure for TLC trigger level lor Trigger C Check Ul800 Rl824 Rl 825 R1S01 Rl804 R1S05 RI806 and the power supply voltages lor the trigger Circuitry pins 8 and 9 of U...

Страница 26: ...ure No Check and repair feedback loop for VREFA U751 R764 C764 0758 CR156 L758 etc I TPl203 within t 1 71 V TPl202 within _ ol 71 V U1202 pin 8 50mVDC CheCk and repair Rl204 Rl203 R1202 R1212 Of ll201...

Страница 27: ...problem Check the AID converters IS Yes R714 C714 0708 CR706 l708 etc IS Yes TPl l02 within 1 71 V Ul102 pin 14 50 mVDC Cheek and repair AII04 A1103 Rl 02 R1112 or Ll101 No Troubleshoot FOFFSET2 using...

Страница 28: ...ithin 0 2 V01 specification y Roplace Acquisition CIoc K Buffer lJ501 or U502 I U504 pin 13 see Figure 9 29 a 10 MHz ECl clock ChtlOk U503A and associated components Check Y501 and associated compone...

Страница 29: ...jL __ 1t Ch i 20 0m T Vol 2 Figure 9 29 10 MHz Loopback to the veo U504 pin 13 TP514 is the Same Signal but TTL Levels TDS 520 Component Level Diagnostic and Repair Manual Vol 2 Figure 9 27 Clock Sys...

Страница 30: ...Is to check for a signal at TP1013 Perform 1he Logic T ger Troubleshooting proc edU lI TOS 520 Component level Diagnostic and Repair Manual Scans by Artekmedia 2011 BEVENTl No Perform the Analog Trigg...

Страница 31: ...g _ diagnostic filii Did the digAcqMemPatDiag diagnostic fail Set Horizontal SCALE to 20 ns N O__ I per division Sel oscilloscope for no triggers Address is changing every 32 ns Check and repair demul...

Страница 32: ...0 ns per division No Check and repair ttle 01 bus data path Since all demultiplexers are in parallel on the 01 bus a single demultiplellef with problems here means lifted 01 bus pins or a d demultiple...

Страница 33: ...the main and pop up menus Set Trig When Upper Limit and Lower Limit to 2 ns Select CLASS Glitch and Filter ON from the main and pop up menus Move the 10MHz clock signal to the CH 1 input Set the trig...

Страница 34: ...70Z I L J I 0 1 j _A L Trigger on the falling edge if Polarity is set to Positive Vol 2 Figure 9 34 Glitch Triggering TOS 520 Component Level Diagnostic and Repair Manual ov 4 1 V 3 5V Vol 2 Figure 9...

Страница 35: ...n to 0 Set TYPE to logIc Note from the Trigger Logic and Delay Trigger troubleshooting procedures we know that both the main and delay triQQefS worle No Note from the Trigger Logic and DeUy Trigger tr...

Страница 36: ...nd it should slew up in 3 ns to 10 ns Does the ramp slew down too last No Doe the ramp look ok see Figure 9 36j No Ye Ul601 U931 U933 U934 and associated circuitry Check and repair Ul601 and associate...

Страница 37: ...tworks should attenuate ECL signats by about 2X Repair the analog triggers Set Is MTHO horizontal Is MTHO No TP1072 high No SCALE to less than No Press HORIZONTAL MENU Timebase and TPl072 low for more...

Страница 38: ...e A15 Attenuator and the probe interlace flex circuit Perform these sleps for each vertical input Note the acqCheckProbes diagnostic reads the Have you checked the right most vertical input Yes probe...

Страница 39: ...c and Repair Manual Scans by Artekmedia 1011 2 TP1068 C2l1 0 C213 I I a GP5l9 TP517 I II I C527 GP517 OP513 1 11 1 Iil g g I il II 1 0 G 12a I D CR D I II II II I I J bo GP502 GP50 i___ 11 U200 I I II...

Страница 40: ...1626 C 00 0 000 I3 QJ RB03 tI A604 f R162t C1 0 0 0 0 R605 o R1648 00 00 R607s R608 C1629 00 5 00 R602 0 Al605 8 U630 I Al604C192 0 0 0 0 R606 t C1OO7 00 00 ti0 Q g R153 00 0 0 GJJ R1627 Cl009 0 0 0 0...

Страница 41: ...r TDS 520 Component Level Diagnostic and Repair Manual Scans by Artekmedia 2011 I 2 COMPONENT NUMBER EXAMPLE C npOIMI II NOIII _ _ _ _ _ _ R STAne l SENSITIVE DEVICES Vol 2 Figure 9 43 A10 Acquisition...

Страница 42: ...Rl540 C 620 en lR 636_80000000000000 g en I ld Pi O _ _ J cL t R1632 J1153 c1 t c c L1620 Ql2Q gAl617 I R1526 en _ _ CR1525 1 1 RJ Q 2 d J C161Q s C1529 C1191 t _ 3 R1525 w W TP16 6 Rl50 e g TPl503 0...

Страница 43: ...t Level Diagnostic and Repair Manual Scans by Artekmedia 2011 2 COB 0 R625 C660 R623 0657 R620 R619 A617 A6l8 C658 R622 0 Al023 0 C665 00 0 0 00 o C659 R10SS Rl052 H D Rl042 Cl 0S3 Rl043 r L1000 0 C55...

Страница 44: ...00 0 o s 0 0 0 0 R543 C552 0000 0 0 C553 oRl89 C202 C105 r _ 0 R290 0 R291 C29ii C1IlO C1 L A191 00 R450 Rl90 e 00 R452 00 0 Cl01 c 00 C542 R451 00 COMPONEHT NUMBER EXAMPLE 0 00 00 A23 A2 R1234 00 JT...

Страница 45: ...70 o C1S70 Rl533 o Al545 o O 0 RI800 o _ Al8l1 o RI809 Rla2 RlS01 Rl824 Rl803 CI53 C152 ClS1 CI50 R639 0644 Rl800 el801 00 00 R1B02 RlSlO R1825 Rl5530 C1802 C1551 o Cl550 00 A631 00 00 00 00 00 00 00...

Страница 46: ...0S BZQ 4 C702 l702 L703 C7Q4 Ai170 C707 R125 Rlt6 00 000 AltS R123 13 11 4 C1590 R1590 e727 L701 C70t A122 00 C726 00 00 00 00 00 00 00 00 00 00 e735 Rl2 e72s R732 R731 R726 A725 A120 0 0 At B119 A72t...

Страница 47: ...A10 4 AlO 17 el 50 AID G c C1705 AIO_II m 0 cros A C I 00 C702 A10 em AIO 17 D CI551 Al 9 C C17OO AlO l1 e CM Alo l C7OJ 11 10 4 0 C Al0 13 C CI552 11 10 17 C C1708 AIO ll m 2O C207 A10 1 00 C7 4 11...

Страница 48: ...0 14 A F l00 00 oc 10 3 A 0 11 50 2A GP513 AIO I4 OD U 11 A1D 4 101 oc A A1D 3 Re17 1 10 11 GP514 A10 14 t71Z A P I02 C A AI0 3 Fl618 11 11 A AIO 17 L713 A m A1D 4 oOC AID 3 11619 AHI 11 GP516 0 17 L7...

Страница 49: ...Al 1 2 AID 12 x 0 7 1 1722 AIO l1 e AIO_3 10 12 A10 12 R1626 AI0 7 111723 AID II 2C m AIO 3 AI0 12 58 RI525 AIO I2 1 3C AI0 7 1 1124 AIO Il 2C TP219 Al 3 A10 12 2C AIO I2 X RI628 A10 7 R112S AID ll A...

Страница 50: ...I 17 x AlO 12 ac A10 11 x oc U101D 50 Al0 13 x A10 17 x A10 5 A10 3 00 AIo ll AIo 13 oc x TPlrol AIO l U212 1J151A Al0 3 U17 11 AIl l1 x AIO 13 oc AlO l U213 AI0 5 1J1518 A10 3 UI103 All ll x AIO 13 0...

Страница 51: ..._ j _ _H j_ _ f_ _ 1 r 1 1 uuv 20 0mVG Stopped 8373 1 i r r r T Acquisitions I M l uups l n J Lllum I Input 1 EEVENT U1702 pin 22 ED EEVENT U1703 pin 23 AEVN11 U1552 pin 20 t Glitch Trigger Stopped 3...

Страница 52: ...A11 Scans by ArtekMedia 2011...

Страница 53: ...rmface troubleshooting procedure Ye Are Ul 340 pins 1 and high a and repair U1340 and U126 No No the Keme Osack troubleshooting prooadure Is U1051 pin l Siow Yes RepoJ any paths between U1051 pin 16 a...

Страница 54: ...three bytc should be 20 7F and FF Ul001 and Ul082 Do occur on Ul331 No Check and repair the data bus attached to the outputs of Ul33 pins 13 15 and 17 211 PIaoe jumpers on J4S and J46 set SI001 to 00...

Страница 55: ...k and repair U1082 pins 1 and 3 and associated circuitsy N o I r lbl to Checi and repair e No Ul049 and the trigger on Ul052 path from Ul049 pin going low pin 13 to Ul052 Chang fle Ul052 pin trigger t...

Страница 56: ...sociated circuitry and or pertorm the DRAM Control troubleshooting procedure Check and repair Ul048 and No associated circuitry See Table 6 2210 thi PAL s equations The equations of interest for a byt...

Страница 57: ...The software is laulty Retum the oscilloscope to the lactory lor service TOS 520 Component Level Diagnostic and Repair Manual y Scans by Artekmedia 2011 Is J23 pin toggling y NO Perform 1he BootROM tt...

Страница 58: ...s the hel number just decoded from U1189 pin 2 5 This loop does not halt if a bus error occurs Pro Using the bus error circuitry and compare to Figure 9 55 Do the signals kxlk the same No PrObe Lh26 p...

Страница 59: ...U1178 pin 11 go loW No when power is cycled y Check and repair the path from U1178 pin 11 to Ul057 pin 1 It is either a data bus Of BootROM problem Check the data bus Yo attached to the outputs of Ul0...

Страница 60: ...during the time the trigger is Check and repai the path from U1069 pin 6 to Ul097 TDS 520 Component Level Diagnostic and Repair Manual Yes Doe Ul069 pin 19 appear similar to the waveform in F tgure 9...

Страница 61: ...heck and repair Ul069 See Table 6 23 for this PAL s equations lOS 520 Component Level Diagnostic and Repair Manual No No Check and repair U1055 This signal should stay low throughout the dsplmplicitBu...

Страница 62: ...gnostic and repair any problems with Ul046 and Ul047 Per10rm the DUART troubleshooting procedure Per10rm the FIFO troLbleshooting p OCedureo I Using the cpuOiagAJllnts each intemJp getting asserted at...

Страница 63: ...e 36 pin 1 high y Con you trigger on U11 36 pin 11 gel high No No Ql9Ck and repair path from 03 Xl 3 toU 36 No Dleck and repair U1178 and associated circuitry Yes Check and repair OSt and RZ016 R2023...

Страница 64: ...2011 U1069 pin Trigger U1069 pin 18 U1069 pin 6 UllS0 pin 8 U1069 pin 5 Stopped 2 Acquisitions 4 M sons Ch I J Ch3 5 00 V Ch4 5 00 V 5 00 V SO Ons oom Vol 2 Figure 9 64 U1 069 Signals When the CPU Req...

Страница 65: ...uts to Ul015 should all be low N Ul072 pins 16 and 13 alternately toggling while the trigger is low Check and repair the paths from Ul072 pins 16 and 13 to Ul007 and Ul0l4 or Ul00B and Ul 09 Is Ul083...

Страница 66: ...e 6 1 8 for this PAL s equations Check and repair the data bus on the output pins 01 U1S2 No No No No Check and repair Ul072 pin 12 81ld associated cirt uiby Check and repair Ul083 pins 5 and 15 Done...

Страница 67: ...out the access Perform the DRAM Dsack troubleshooting procedure No N o Perform the Display Dsack troubleshooting procodure I the DSP Utrn7j being accessed Ye 00 Ul054 pins 1 and 4 stay low throughout...

Страница 68: ...e the address and data pins on Ul004 UHX 6 during tile time the trigger signal is low Also look at these same signals on Ul097 to verify they are connected Does there seem to b contention on 1he TSIA...

Страница 69: ...o U1 179 NO le t le cpuMiscReg does nol exercise this pin so there covld be a problem with U1 179 and or 024 TDS 520 Component level Diagnostic and Repair M anual Scans by Artekmedia 2011 The OSP dsac...

Страница 70: ...iagnostic and Repair Manual No S uck ats bus contentions and or sigws tiC d together Also check and repair TSIA 12 1 Ul00 pin 8 high Check and repair No Ul 00 and associated circuitry Run the dsplnstr...

Страница 71: ...N O Ull33 excepllor Check and repair all the imerrupt mask OR gates U1322 Ut017 UII30 and U109 and the paths from those circuits to Ut133 and Ul093 VERTI NT y 0 U1133 pin 8 Yes going high in response...

Страница 72: ...Ul072 is not enabled causing a contention wtttr Ul084 Are Ul084 pins 7 and 8 toggling when Ul084 pin 19 is low No pins 58 66 and 99 of Ul097 togging when U1084 pin 19 is low Check and repajr Ul084 Ch...

Страница 73: ...lrU1114 pins 8 13 high y Trigger on Ul 10 pin 48 going low Cycle power and run the cpuDRAMmem I there at least Yes 65 ms between the first end second triggers No Run the cpuDRAMlnit in a loop This dia...

Страница 74: ...ure 9 76 U111 0 Bus Interface Signals l DS 520 Component Level Diagnostic and Repair Manual Scans by ArtekMedia 2011 U1114 pin fJ DRAM U1118 pin 4 RASIO 3 U1 118 pin 23 CAS D 3 U1118 pIn 9 MAO this si...

Страница 75: ...circuitry Ace Utl l pirs3 and 6 both toggling Scans by Artekmedia 2011 No RepairUll11 Trigger on U1Q55 pin 0 going low The DRAM signals typically look like Figure 9 78 However the signals resemble Fig...

Страница 76: ...THIS PAGE IS MISSING FROM THIS COPY IT WILL BE REPLACED BY ARTEKMEDIA AS SOON AS WE CAN LOCATE A COPY...

Страница 77: ...stics again to locate the problem Check and repair Ul074 Trigger on U1 l96 pin 5 going low Trigger on U1074 pin 18 Y es ____________________ going low Is Did the cpuOiagFIFOMem diagnostic fail when ac...

Страница 78: ...OS pin S Yo Does he data pattern on U130S pins 11 17 and 19 match the pattem 55 programmed during the write cycle Note U1305 pin 19 is the most significant bit ignore the way the Ie is labeled in the...

Страница 79: ...The board to register is ok No Ok the LED nash anything Intelligible Set SI001 to 0010 000 and C CIe power Enlef 1he emulator mode and type in the command rb OEO 0000 c ros 520 Component Level Diagno...

Страница 80: ...epair U1058 and Ul049 Trigger on U1331 pins 22 and 24 Yes ANCed together going low look at L J the output pins of U1321 vou will have to cycle poWer repeatedly to make these measurements No Per10rm th...

Страница 81: ...Kernel Control Signals Stopped 2 Acquisitions i mV Trigger level j iw1t 1 U1331 pin 32 Vee Q3 pin 3 Reset I o t T I n1 luumv I lil j il uuv M luums Ln l J Vol 2 Figure 9 87 Reset lOS 520 Component Lev...

Страница 82: ...ocedure N o No Perform the Bus Control Register 0 procedure Check and repair Ul340 and the path from Ul340 pin 6 to J23 No Make sure that R64 is Check and repair he paths from Ul051 pin 16 to Ul340 pi...

Страница 83: ...U1336 is fine Some other circuit is probably trying to drive the kernel data kles when it should not Check all other devices conoected to KD 24 31 to see iI one or more are enabled when U1336 Is Trigg...

Страница 84: ...0000 8e c be This continuously wrttes aa to location 0400 0000 in the NVRAM Trigger on Un 07 pin 22 going low Is there II trigger No Check and repai Ul055 pin 11 and the path to U1107 TOS 520 Componen...

Страница 85: ...situation that OIiginaJlV raused the instrument to go into standby mode it might S mpiy be toggling the ON STey button un 01 pin 3 before recreating the standby situation Does the instrument go into s...

Страница 86: ...17 See Table 6 18 for this PAL s equations T _ on U64 pin 3 Are U60 pins 50 and 52 toggling No O ed repair Ul084 pins 11 and 13 Scans by Artekmedia 2011 Are U17Q N o For U17Q pin 7 check pins 7 and 8...

Страница 87: ...1hen Rl59 shOuld be on the board Repair any errors on Ul00 s data outputs and or address fines RSO AS and RS2 Run in a loop 1he dsyDiagRamdacRegMem Trigger on Ul 90 pin 6 going low Is U190 pin 6 acti...

Страница 88: ...low Is there a trigger y Random dOl mode should not be jailing Run the Display diagnostics to find the problem Check and repair the path rOlT lJ60 pin 45 to U55 pin 1 Be sure that U l pin 45 also con...

Страница 89: ...ce pins 1 01 U45 and U46 active No Check and repair U 083 pins 5 and 5 Does the diagnostic indicate thai there are address bus errors Run the dsyDiagAasAegAddr diagnostic and repair any problems No Yo...

Страница 90: ...nd or signals tied together on US9 pins 20 24 Since there is no predictable pattem on these outputs you need to observe them for a while Look fOf lines that never change stale or thaI always switch at...

Страница 91: ...6 Low VcHlage Power Supply Yes Module Isolation troubleshooting procedure in the A16 Low Voltage Power Supply part 01this section TDS 520 Component Level Diagnostic and Repair Manual Is 03 pin 3 simil...

Страница 92: ...ent Level Diagnostic and Repair Manual pins 14 and 24 01 U71 and V72 toggling whHe pins 13 of U71 and U72 are active and while pins 1001 U71 un Check and repair UTI and un N o Check and repair Ul80 pi...

Страница 93: ...es U1332 pin 11 go k w No Does No Be sure U1190 U1190 pin 6 _ pins 2 and 4 are go lOW connected to VCC y Check and repair U1 54 U1177 and U1 176 All outputs of U1 177 should be high except pin 5 Who U...

Страница 94: ...uations lOS 520 Component l evel Dlagnos1ic and Repair Manual Scans by Anekmedia 2011 U39 and U40 pins 20 toggling No Check and repair the j patns from Ut71 pin 1 1 to U39 and U40 Check and repair U 7...

Страница 95: ...Check and repak UIS2 pin 14 and or US pi 21 A pins 12 01 U 12 U115 active Check and repair the paths Irom pins 12 of U112 Ul15 to UI90 y Although the next four questions reler only to Text Plane 0 you...

Страница 96: ...itions I T J 100mV Vol 2 Figure 9 105 Video Out Signal TDS 520 Component Level Diagnostic and Repair Manual Scans by Anekmedia 2011 Vol 2 Figure 9 104 Video Troubleshooting Procedure Cont Al1 DRAM Pro...

Страница 97: ...1 pins 32 34 O O OorO 1 0 al he trigger Check and repalr any problems on US1 pins 32 34 due to stuck pins and or pins shorted together Are the pins low OCN v No Check and repair SP 20 22J Is UBI pin 2...

Страница 98: ...c and Repair Manual N o Is Ul69 pin 23 going low No Perform the VSC Register troubleshooting procedU e 1I1is will help you repair Ul69 A Check and repair the paths trom UI69 pin 23 to U79 an l usa U60...

Страница 99: ...28 pins 7 and 10 A so II9 ify that the output l of U28 U30 ruo connected to the inputs of U36 U38 Check and repair U59pin41 Check and repair USB pins 4 6 and U59pin41 TDS 520 Component Level Diagnosti...

Страница 100: ...dEn l II 1 tD R63 Il D 0 0 o o OOIlO OO JIlDIl DODOllDO Ul IlDOQ lD O IlD DIlDO IlIlDOaOOCOIl ODO J HIDIl DDOOIlDDOOIl I 1 0 b 0 D 1fl l oo t J 1fl1 1 Oil DOD ODullllllOODIl D 00 11 11 1100000011011...

Страница 101: ...11211 1 jjQ J44 l il I Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q 9 C79 Scans by ArtekMedia 201 1 0 I 8 gOfij Q Q 5 Q U1107 Q C1 125 Q Q C1121 Q Q Q Q Q 9 J5D3 00 lilll I I I 1 o 5 Ii ll 0 0 0 0 0 0 0 0 0 0 0 0 0...

Страница 102: ...UUlV g U47 g g g 0 U42 U41 C 32 C30 1 oeoooooooooo11 1 COOOOOOOO l l 1 g g lIIliHHlj HltHlit TP62 EJOOOOElOOOOO F U I3ClOOOOOOOOO 0 U 90 CL cL __ C 1 Rl58 0 U200 Ul08 C105 ee7 C86 TPS C84 C82 o R157...

Страница 103: ...0 0 c C109 C1 Ci41 0 0 0 0 U170 g g o 0 U1074 0 0 TDS 520 Component Level Diagnostic and Repair Manual I II II II II II I a a a c a a U1I 69 V I I i I Scans by ArtekMedia 2011 C1242 9 Cl024 U1085 5 S...

Страница 104: ...6 RI021 Al1 5 Al1 21 11 11 27 x 11 11 27 x 11 11 4 11 11 5 Al1 27 An 11 27 11 11 27 11 11 7 m 11 11_4 11 27 M 00 11 11 27 AII 27 x All _S RI028 11 11 4 0 11 27 Cl IO Al1 27 X CI240 11 11 27 0 11 3 X 1...

Страница 105: ...11 26 X AII 18 X U _ All 24 All IS A e Ulll A11 3 m Al1 18 x Al 19 X U I66S AII 24 UI046 All IS UIII5D AI1 3 All IO x Al 18 UI67F 11 17 W Ul047 All_IS UII15F Al1 3 Al1 24 AII 18 U I67A 11_24 Ul048 Al...

Страница 106: ...2 AI1 6 Ut 7 C A11 6 UI3220 Al1 10 UI335 A11 3 Ul341e Al 9 UI I6 1 Al1 S UU7aD Al1 e UI3ZZA 111 7 e A11 6 Ul34 1C All II Ull 4 Al1 6 Ul17Q All U13226 All_7 e U1J38A All 4 e UI342C Al 14 Ul 1 i5A All 5...

Страница 107: ...ls TDS 520 Component Level Diagnostic and Repair Manual VIDEO_OUT MARGIN ffi SRLO SGTO SGTl sero sen LI sew TeK Stopped 4974 Acquisitions I r Typical video signal to the monitor Blanking period occurs...

Страница 108: ...A12...

Страница 109: ...t panel N o Per100n tile Front Panel Mux Test Loop Iroubleshooting procedure Chect and repair US U9 and the Front Panel Pots v I Ul pin8al 5V and Ut pin 7 al ground v No Pertonn Front Panel Mux Test L...

Страница 110: ...itions I f I T L _ i _ 1 0 1 I H i r H i i i 1 I i J l 1 T i Vol 2 Figure 9 117 PCO timing Trigger Position 10 Stopped 18 Acquisllions 1 T Vol 2 Figure 9 118 peo Timing Trigger Position 10 6 11 O S l...

Страница 111: ...f 00 when the Bell should ring I there a 16 ms pulse thai does not go near 5 Von U3 pin 9 When the Bell sholAd ring y Replace U3 procedure the Bell prod a nO lsU3B pin l3al 5V No Check and repair FPPR...

Страница 112: ...l LEOs ok No Pet10rm the Front Panel LED Test Loop troubleshOOting procedure Check and repair U5 U7 051 0524 and associated circuitry TDS 520 Component Level Diagnostic and Repair Manual Scans by Arte...

Страница 113: ...output goes low The front panel LED Circuitry is ok N o No N o Check and repair Ul US UB and U7 Check and repair Ul US U6 and U7 Check and repairUl US 00 and U7 Check and repair US U7 and associated...

Страница 114: ...and is the change smooth r the entire range of the pot No TDS 520 Component Level Diagnostic and Repair Manual Check and repair Ul US and U9 Check repair Ul US and U9 Check and repair tile affected p...

Страница 115: ...s Ul pins 3 and 8 at SVand No Ul pin 7 at ground Yes Ul pins 24 31 No at 5V Yes WiIh nOo Jumpers No installed on p are TP6 TP19 and TP29 at 5V Yes Aun the Front Panel Sell Diagnostic Loop Check and re...

Страница 116: ...and Repair Manual Scans by Artekmedia 2011 Slopped 82 A cqLllsltiollS 1 T H H 1 H t T I t 1 T Cill PWid 3 200SJJS Chl NWid 3 2000 S 2 000 V MS JJSCl 00 V Running OFF 1 4 1 I I I 1 r I t 1 t i i i I j...

Страница 117: ...s No Check on TP1 1 TP18 match the repair U4 and waveforms shown in associated Fgure 9 13O circuitry TDS 520 Component Level Diagnostic and Repair Manual Scans by ArtekMedia 2011 PSO PS Stopped 363 Ac...

Страница 118: ...Penorm the Bell troubleshooting procedure T m the fear panel POWER switch ott and then back on Is TP1 Qa 2 kHz 0 0 V to 4 4 Vsquare wave Are U3A pin 5 and CALSIG kHz waves Check and repair NOO _ I U3A...

Страница 119: ...0511 o irg CR105g 16o ir 02 5 a5 a CR107 CRt06 CR104 CR103 CRlOl CAHXl o B 0 TPS U8 1 1 0 GIJ RSO 1 1 1 I li ill 1 11 l lfll l 1 0 I I O DSS 0 0 TPS n Tt l ll n 0 1 111 0 OS10 1 8 1 I I O DS BI I O P3...

Страница 120: ...0 IE Uii ml1II illIa S33 S35 S36 537 0 0 0 illIa 0 muu 0 ltiJlIl iH 0 0 57 sa 59 0 0 0 0 0 ml1II iIIId 518 0 0 0 0 S38 54 55 56 0 0 0 illIa liliW 0 0 0 0 0 0 0 0 0 0 0 51 52 53 519 0 0 0 0 JEjjjj IIl...

Страница 121: ...1 0 12 4 0 12 3 0 12 2 A12 1 oc 0 12 1 0 12 3 11 12 2 A12 2 0 12 0 12 1 A12 3 0 12 2 50 A12 2 0 12 0 12 3 A12 1 1 12 2 0 12 2 0 12 1 0 12 3 50 00 0 12 1 e A12 2 12 2 DO 0 12 3 AS A12 1 0 12 2 0 12 2 A...

Страница 122: ...2011 Stopped 21 Acquisitions Envelopes 1 Ic T l j T j T 1 noli Slopped 15 Acquisitions f T f r f l I T T l t O msCh t l r 2 Probe Compensation S gnal ell I i OOO V 1 2 DO OmV M SOO JS enl J 2 00 V TP1...

Страница 123: ...A13 Scans by ArtekMedia 2011...

Страница 124: ...part 01 the Maintenance section Make sure that 5 1002 on the At 1 board is switched towards the back 01 the oscliloscope Power on enter the emulator mode an type wb 00400000 67 then il 0100 0000 0117...

Страница 125: ...c TP c c CO c c cTpsc c TP2 o TP15 U40 C2 I U408 U405 U409 o TP TP46 0 o TP44 I I u U402 I I oTP23 U406 J2 U403 U407 C403 TP41 0 TPSl N cs 1 1 0 TPSO TP1BTP19 C12 0 TP2 o ooTP20 u O o OTP17 TP56 0 I I...

Страница 126: ...SCHE LOCATION HUMBER lOCATION NUMBER HUMBER LOCATION NUMBER LOCATION A1 3 1 A1 3 1 13 1 A13 1 A13 1 AI 3 1 AIl I c AI3 1 PO A13 1 A13 1 A13 1 AI3 1 m A13 1 113 1 113 1 0 113 1 n 113 1 113 1 113 1 113...

Страница 127: ...A14 Scans by ArtekMedia 2011...

Страница 128: ...0 0 0 0 00 0 0 00 00 0 00 0 0 0 00 0 0 0 0 0 0 0 0 00 00 0 0 0 0 00 0 re s 520 Component l evel Diagnostic and Repair Manual I 2 PHXl lao 00 00 0 00 00 o og o og 00 00 0 0 0 0 00 00 0 0 g o 00 00 00...

Страница 129: ...n NUMBER NUMBER LOCATION NUM BER lOCATION UM8ER NUMBER NUMBER I OCA TION NUMBER NUMBER lOCATION NVIo BEA LOCATION NUMBER UMBER LOCATION HUMBER LOCAllON 1 4_ 4 _1 A1 1 Al _1 A14 _1 01 14 A 1 14 0 1 00...

Страница 130: ...a A15...

Страница 131: ...P1153 pins 16 and 18 ok see Table 9 8 Correct the 5 V or 5 V problem on the circuit board Do the outputs 01 U 150 U1450 have the correct resistance 10 ground see Table 9 9 Replace all lour hybrid att...

Страница 132: ...Hybrid Ground Ground 11 17 17 kGI ICGND 12 20 17 kGI ICGND 13 10 17k01 ICGND 14 18 370fl RELAYGND Pin 8 15 24 370fl RELAYGND Pin 8 16 11 370fl RELAYGND Pin 8 17 4 370fl RELAYGNO Pin 8 18 25 1 1 kfl R...

Страница 133: ...G C ll4 C 1 205 C1306 C 1 305 C1406 C1207 P1300 Cl 307 000000000 0000000 00 Ci3l0 B C 1410G 0 U1450 TPl 00000 0000 U1380 000000000 A1380C 1 382C l CD b AT 3OQ AT1400 O C1 Cl 301 O C1 C1304 C1309 C1400...

Страница 134: ...CI201 415 0 e 415 0 Pll53 Cl 02 C 5 0 15 0 roo 5 1 WI OO Cl103 c A15 o e WIIDl 50 CllGo 0 CIllO 5 0 Pl l A15 O e roo 50 Cl10i5 0 15 0 C111 5 0 CI401 15 0 AI5 0 oc Wl201 15 0 50 2A CI106 15 0 Cl112 5 0...

Страница 135: ...A16 A17 A18 A19 r i I Scans by ArtekMedia 201 1...

Страница 136: ...T1 the Acquisition Processor troubleshooting procedure located in the A10 kquisition part 01 this section across J27 pins 1 Yes fan s COflfle Ctor securely attached to J20 on the All DRAM ProcessorlDi...

Страница 137: ...rcuits that can hold U2 pin 6 low Is EITOI Amplifier U1A pin 3 at 2 5 II Is Error Amplifier U1A pin high Is Error Amplffier U1A pin 2 loW No lOS 520 Componenl l evel Diagnostic and Repair Manual I Cul...

Страница 138: ...VDe Input and Bulk As the Ground Reference C H l 5 lJ A I 20 s 3 2 8 U lJ ERT 1 M I I I I j CH l COUPLI AC Vol 2 Figure 9 145 FET DRIVE Waveform With 60 VDC Input and Bulk As the Ground Reference ros...

Страница 139: ...lrage and voltages up to 800 VDC ate accessible during this procedure Refer to the Safety Summary at the front of this manual fOf safety information Turn the power switch off and unplug the power cord...

Страница 140: ...aln LV Power Supply board This will force the high Check and repair the L _____ _ _ _ _______ j Low Bulk Fault and r maximum duty cycle Connect a variable voltage supply 7 V tn J6 pin 5 top of R42 Wit...

Страница 141: ...C 50 n ON D Vol 2 Figure 9 149 GATE DRIVE With 60 VDe Input and W4 pin 9 As the Ground Reference lDS 520 Component level Diagnostic and Repair Manual I N UE R T O N D F F Scans by ArtekMedia 2011 CH l...

Страница 142: ...er Supply Secondary troubleshooting prn edure I the 00 V supply in current limit cY ___ I Look fot and repair short _______ on the AC sde of CAS r Is the VOltage at elZ Yes Make sure that the more pos...

Страница 143: ...xternal supply I r the sU y Y _ 1 1 k and repair chirp rTKXle in chirp fault circuits See Table 9 13 mode No 07 and receiving Y __ rCh OC k Ihe d ru n g 0 I a 7 _________ J gate we See and 08 and the...

Страница 144: ...11 2 I 2 2 2 J6 Itl Cjl B 06 R39 R 00 C 9 V R26 fa 1 02 1 2 0 0 0 0 0 a 0 2 12 J 0 0 0 R31 A28 0 R m o 0 1 J 0 1 CAll L9 Y VR1 C C S f 0 0 2K I R35 5 fiiit 1 1CA10 f O 10 023 CR1S It 0 po C11 01 0 2 0...

Страница 145: ...pair Manual 4 COMPONENT NUMBER EXAMPLE A23 A l R1234 T T c _ Ift Io _ _r_ R STATIC l SENSrTI E DEVICES Scans by ArtekMedia 2011 Vol 2 Figure 9 156 A17 Main LV Power Supply Board Section B A16 A17 AlB...

Страница 146: ...AC U o p L1 o C24 0 o 2 o C9 o AT5 o c o o o 17 o 0 as I r C10 o R12 o o 0 e CR2 A E TOS 520 Component Level Diagnostic and Repair Manual CO PONENT NUMBER AMPLE COIIl IOIIeW NIItlDet R STATIC VJ I SE...

Страница 147: ...Diagnostic and Repair Manual I 4 o l10 0 R75 I Scans by ArtekMedia 2011 CONPONENT NUMBER EXAMPl a _ _ __ _ _ _ It STATIC J SENSITIVE DEVICES Vol 2 Figure 9 158 A17 Main LV Power Supply Board Section D...

Страница 148: ...17 2 0 CAli AI1_1 An A17 2 A17 2 A17 2 0 CAI2 A17 1 An A 1 2 0 A n A17 1 e A17 2 CRl3 A17 1 Q AI1 1 c A17 2 0 A17 1 5A A17 2 A17 M A17 1 e A17 2 An AI1 A17 2 CR S A17 1 Q AI1 1 0 An e A17 2 A17 1 A17...

Страница 149: ...ic and Repair Manual IN UE R T ONiD f Scans by ArtekMedia 2011 CH1 5ElEl J C H I C H I 5 1 s 5ElEl U U E R T F R EQ 6 3 3 6 k H z p p __ _ _ _ _ _ J GNio CH 1 COUPLING 50 ON OE I N UjO R T ON lbFF DC...

Страница 150: ...R T RC OC ON OFF ON iDFF W2 pin 11 Ground W4 pin 9 TDS 520 Component Level Diagnostic and Repair Manual CHl CHI CHI A 2 l S p p FREQ rr CHl l 05 4 3 kH z _ _ _ _ __ _ _ _ __ __ _ I Hl CHl C OU PL lN...

Страница 151: ...pin 9 A C H 1 C H 1 zp s P p FREQ El B U CHl 72 3ElB U l 05 04 kH z Hl CHI COU P LING DC GN _ _ _ _ _ _ __ _ _ 50 ON Q I N UE R T ON Q T6 pin 9 Ground W4 pin 9 TDS 520 Component Level Diagnostic and...

Страница 152: ...0 U5 00000000 o COMPONENT NUMBER EXAMPLE A23 A2 R1 234 rr L If 0 _ _ _ _ _ _ R STATIC 3 1 SENSITIVE DEVICES A18 Vol 2 Figure 9 160 A1BMain Converter Control Board A16 A17 A18 and A19 Low Voltage Power...

Страница 153: ...0 18 1 0 18 1 0 18 C 0 18 1 AU coo 0 18_1 0 18 1 A1S el l A 0 18 C A18 1 AU C 10 0 18 S A18 1 0 18 1 OA C A18 1 A OA CRll 11 18 C OA Al l C OA 11 111 1 A18 1 OA C A18 CR12 11 18 1 M 11 18 1 11 18 1 1...

Страница 154: ...S pin 7 Ground W4 pin 9 C Hl 5lJ A i 2 s j F H l jP P C Hl FRE Q 1 CH l l5 El El lJ l El4 6 El k l z i H H l I CHl C OUP L ING 50 I N UE R T AC DC GN D ON O F F ON D FF W4 pin 10 Ground W4 pin 9 TDS 5...

Страница 155: ...evel Diagnostic and Rep air Manual COMPONENT NUMBER EXAMPLE 0 _ ___ _ R STATIC J I SENSITIVE DEVICES 2 A19 Scans by ArtekMedia 2011 Vol 2 Figure 9 162 A19 Power Factor Control Board A16 A17 AlB and A1...

Страница 156: ...11 9 11 9 1 11 9 11 19 CO 11 19 1 11 9 1 W 11 9 AIii 11 19_ CRS 11 19 1 11 9 3C 11 19 Rill 11 19 1 C 11 9_1 C 11 9 1 oo 11 9 3C 11 9 00 C 11 51 A 9 11 9 1 11 19 Alii I X 11 9 C 11 9 11 9 1 AIii W A I...

Страница 157: ...A20 j r Scans by ArtekMedia 2011...

Страница 158: ...damaged or defective deflection yol tl can cause these faults can the comer focus be adjusted No Replace the CRT deflection yoke combination V1000 1100A L100B Is the conect waveform at TP172 Yo No Che...

Страница 159: ...itry No In the order listed check m repai 0205 CR205 CR149 C320 U428 C248 C455 C423 C258 1225 1100A and V1000 Adjust R569while watching the display screen Ooes a lighted background appear with no pict...

Страница 160: ...s Ihe a ramp signal at A335 Yes No Check and repar U428 and associated circuitry Check and tepar J340 P340 Ll00B and associated circuitry Check and repair R335 and associated circuitry No Tum off the...

Страница 161: ...r TP172 J475 b J574 00000000 DODOODDD COMPONENT NUMBER EXAMPLE _ _ _ _ R STATIC Jf SENSITIVE DEVICES Vol 2 Figure 9 166 A20 CRT Driver Board A2 O C R T D V bO 2 S9 t14 44 res 520 Component Level Diag...

Страница 162: ...MBER NUMBER LOCATION NUMBER LOCATION HUMBER N UMBEA LOCATION NU OER LOCATION NUNB ER NUMBER LOCATION NUMBER lOCATION C171 00 R 4 em u A527 em C4 LIOOB A R528 C248 C4 7 M R372 A 50 C LlS1 R374 A Cl 6 c...

Страница 163: ...TDS 520 Componenllevel Diagnostic and Repair Manual ChI Per 16 668ms Ch1 Per 16 672ms TeK Stopped 4 12 Acquisitions I T Refl 10 0 V 2 00ms Stopped m 1204 Acquisitions I T r I 1_ Scans by ArtekMedia 20...

Страница 164: ...Per IT 99jJ S ChI PWid 14 94 1 ChI Per 32 00j U eM NWld 3 33J LS Scans by Artekmedia 2011 S lopped 9968 Acquisitions 1 1 1 t H r l I j Stopped 13386 Acqulslt jons 1 4 200mV ChI Per 32 00j l s ChI NWid...

Страница 165: ...f M UUJ 1S I nl J TDS 520 Component Level Diagnostic and Repair Manual ChI Per 32 00 ChI PWid 14 71p s 1 eIc Slopped 9976 Acquisitions 1 t 1 It k Stopped q90 Acquisitions Scans by ArtekMedia 2011 75...

Страница 166: ...Scans by Artekmedia 2011 A21...

Страница 167: ...H 15 0 ellO C 09 C OB Rl03 Rl02 Cl01 TOS 520 Component Level Diagnostic and Repair Manual COMPONENT NUMBER EXAMPLE Campooent NIJtnb A23A2 TT L _ _ _ _ __ 11 STATIC l I SENSITIVE DEVICES Vol 2 Figure 9...

Страница 168: ...TION NUMBER NUMBER lOCATION NUMBER LOCATION NUMBER HUMBER LOCATION NUMBER LOCATION CIO 0 21 e oo 0 2 1 1 PSO 8 0 21 1 0101 0 21 1 M A21 1 e 0 21 CliO 0 21 1 PSOle A21_1 0 0 21 1 00 0 21 1 e J 21 1 P50...

Страница 169: ..._ 1 J Schematics...

Страница 170: ...TCHES iO T6 N AHe FRONT PANEL REAR P L SWfTCHES J FRONT PANEL LEOS FRONT PANEL i POTS GPIB IEEE 5ro Be PORT 1 I S I GNAL PROBE i CONPENS t TION TUBE SSEHBLY 1 A12 RONT PAteL OISPL y II 1 S YSTEM I LOW...

Страница 171: ...I I C I A 2 1 YCO wIO TDS 520 I R5 1 EN C m Ii PING EN C 1 GO PltcI EN C 1 0 I eo PINS E I C n w l A 2 0 CRT IIU ItOARO INTERCONNECTIONS...

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Страница 186: ......

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