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Service Manual TSG 90 PATHFINDER™ NTSC Signal Generator

1. 1 0 Li 1 5VA C45 E OuF ce s TEST SIGNAL TEST SIGNAL si Ore OUTPUT FILTER OUTPUT AMPLIFIER 12 R33 34 2 74k m cu 16 15 14 ro 1 0uF TPS 2 2 3 2uH 2 2 8 2uH 2 2 8 2uH TP6 914 C35 1 Ut MB40760 5VA 150pF Ro Ro OPA603AU R13 J7 D10 LSB aout H7 5 5 A 750 I TEST D9 R35 R34 R6 3 SIGNAL OUT 08 3 5 62k 2 74k 75 0 TP4 D C36 C37 C38 TPS R14 3 e 07 VROUTI E 33pF 750 sl D5 vrouT2 16 9 22 83uH C40 L css gt IR His D4 13 1 200pF 1 550pF 1 550pF T 170pF c9 500 D3 1 0uF o D2 45 GAIN D1 veco Hie O 5V our C42 C34 NA veca H 1 cs 550pF 1270pF AGND 2 T our VRIN 14 5 RH ae i 2 21h 79 0 66 0 98uH 4 2 R8 R9 R10 5 62k 121 562 TEST SIGNAL rt C7 DAC 7 50pF 22pF OFFSET SINX X U20 1408 vid eur 2 5VREF GND E C10 6 1 0uF 18 2k NC E di gt NC m 02 45 6 R20 pe L10 12 R22 R36 249 2 ML2036CS 100uH 10uF 12 1k 1 82k U2 27 AUDON 3 vout Hi N R54 U2 24 AUDSCK So TP8 4 75k 7 GND 4700 57 AUDIO OUT U2 25 AUDSID SID i GAIN 016 m 1 0uF xaciciss U2 26 LATI INC LS U8 30 AUDCIK 2 CLKIN c kour 4 ACHT OFF
2. 1 16 Figure 1 16 Safe 1 17 List of Tables Table 1 1 General Video Test Signal Characteristics 1 3 Table 1 2 Video Test Signals 1 4 Table 1 3 Character Identification 1 6 iv TSG 90 PATHFINDER Service Manual Contents Table 1 4 Audio Tone 1 7 Table 1 5 Power Supply 1 7 Table 1 6 Physical Characteristics 1 7 Table 1 7 Environmental Characteristics 1 8 3 1 Table 3 1 Required Test Equipment TSG 90 PATHFINDER Service Manual V Safety Summary Terms Symbols vi This summary contains general safety information for operating and servicing personnel Specific warnings and cautions are given throughout the manual where they apply but may not appear in this summary In this manual CAUTION statements identify conditions or practices that can damage the equipment or other property WARNING statements identify conditions or practices that can cause injury or loss of life As marked on equipment CAUTION indicates an injury hazard not immediately accessible as one reads the marking or a hazard to the equipment or other property DANGER indicates an injury hazard immediately accessible as one reads the marking In this manual This symbol
3. TSG 90 ROWO 1 UPD3 1 ROWi 2 UPD2 2 S ROW 3 vie 3 1 lt Rows 4 4 15 ROW lt ROWS 2 UPD o 3 ROWS 7 7 i gt ROW 8 8 15 9 LCDE 9 15 10 LCDRW 10 I 1 1i LCDRS ii 1 12 12 715 13 13 15 KA 15 E QUA 1 R2 4 Tk ID GENERATOR J2 5V U1 gt 1 ROWS UPD6142G 101 LCD CONTRAST Ri 273 ROW UPDO 2 9 IDDATA 5k gt ROW4 NVSDA UPD1 1 VR o 215 NUPD2 DATA vo Hz 216 1 ROWS CIDCS 4 dem XE TOT ROWI 10 ROWS IDHSYNC 14 4 HSYNC sone 4 AoW DEMO 13 4 tH 16 15 2 amp 4 TESTIN CLKOUT 32 COLO 5V A2 2113 ON REY MICROPROCESSOR
4. 90000 90000 900000 CH oz O O The PATHFINDER provides character ID capability as well storing up to eight messages consisting of two 16 character lines of text Any one of these text mes sages may be inserted into the video test signal or up to four of them may be cycled in a continuous loop displaying for 1 to 9 seconds each in any order These messages may be displayed anywhere in the safe action area of the picture or the first line of the message may be moved into the vertical interval In addition to the eight text messages the PATHFINDER can also store as many as four complete front panel configurations User Presets which can include menu selections text messages and tone and cycle information The PATHFINDER is DC powered using either an AC adapter with 12V output 18V maximum open circuit eight AA batteries or a 9 6V NiCad battery pack optional accessory In instrument charging capability utilizing the AC adapter TSG 90 PATHFINDER Service Manual 2 1 Operating Information is provided for the NiCad battery pack only If eight AA NiCad batteries are used a separate charger must be provided Controls Indicators and Connectors 2 2 Controls The controls for the PATHFINDER consists of a keypad which has buttons to make operational selections and entering menus alphanumeric buttons for text entry and test signal selection a
5. XX TP1 Y J1 1 0 Ut 20K 1 wa R100 2 741 Nc 1 IN 0 OHM 3 NIDEG gt REFER TO ci L WAVEFORM A 100F7T PAD BNC FEMALE FRONT PANEL NOMENCLATURE SE CLOCKWISE HEAT SINK PART NAME US AJUSTMENT J5V SCHEMATIC amp R55 SEE PARTS LIST BOARD REF Ra 100 0 FOR SELECTION ROTATE 20k CRITERIA P md W751 SCREWDRIVER 9 gy BASE DRIVE ADJUSTMENT 711 amp SNUBBER AS ANALOG BOARD SQUARE PIN FUNCTION BLOCK TITLE C27 CONNECTOR lt CIRCUIT BOARD SEE PARTS LIST FOR OUTLINE EARLIER VALUES AND SERIAL NUMBER RANGES INSTRUMENT NAME VERTICAL INPUT A1 SCHEMATIC NAME amp NUMBER A ASSEMBLY NUMBER 4 1 46 COMPONENT LOCATOR GRID 6 2 TSG 90 Diagrams Circuit Board Illustrations 06 OSL AS AS LNdNI AU3LLVO AD 3301 2 338 19 U pedsay IN 1038 J19U97 Gai 21 jausay dr viva al gn 1932950 TI pue Burun 83181 SNOUd 93901 20816 358 6 3 TSG 90 Diagrams Circuit Board Illustrations 6 4 The schematic diagram has an alpha numeric grid to assist Schematic Diagram 1 Key Board Component Locator Chart in locating parts within that diagram Assembly A2 Comp Diag Bd Comp Diag Bd Comp Diag Bd No Loc Loc No Loc Loc No Loc Loc H1 B6 S14 D3
6. 50 Hz 4 KHz 63 Hz 8 KHz 125 Hz 10 KHz 250 Hz 12 5 KHz 400 Hz 16 KHz KHz 20 KHz 2 KHz Move the audio cable from the PATHFINDER Audio CH 1 output to the Audio CH 2 output CHECK that the Audio Output is 8 dBu 0 25 dBu at each of the following frequencies 20 KHz KHz 16 KHz 400 Hz 12 5 KHz 250 Hz 10 KHz 125 Hz 8 KHz 63 Hz 4 KHz 50 Hz 2 KHz Set the Tone Frequency to 1 kHz and the Tone Level to 4 dBu CHECK that the CH 2 Audio Output is 4 dBu 0 25 dBu Set the PATHFINDER Audio Level to 0 dBu CHECK that the Audio Output is 0 dBu 0 25 dBu TSG 90 PATHFINDER Service Manual Performance Verification and Adjustment Procedures m Reset the PATHFINDER Tone Frequency Amplitude and Click to their normal operating pre step 15 states Adjustment Checklist Use the following checklist if you are familiar with TSG 90 operation and adjust ment Step by step instructions for all of the procedures begin on the next page 1 Adjust Subcarrier Frequency Set frequency as close to 3 579545 MHz as possible 0 5 Hz 2 Adjust Audio Output Amplitude Click off diagnostic menu 0 dBu Adjust Tone Level R53 for 0 dBu 0 05 dBu Change diagnostic menu to 4 dBu Adjust to 4 dBu 0 05 dBu with the 4 and p gt keys Change diagnostic menu to 8 dBu Adjust to 8 dBu 0 05 dBu with the 4
7. 4 5 Torque Specifications 4 5 Replacing Assemblies 4 5 Back Cover Removal and Replacement 4 5 Connector Panel Removal and Replacement 4 6 Main Board and LCD Removal and Replacement 4 6 Keypad Removal es 4 6 Keypad Replacement 4 6 Replaceable Electrical Parts List 5 1 Diagrams Circuit Board Illustrations 6 1 Replaceable Mechanical Parts List 7 1 List of Figures Figure 1 1 SMPTE Color Bar Components 1 9 Figure 1 2 75 Color Bars 1 10 Figure 1 3 Red Field 1 10 Figure 1 4 8 1 11 Figure 1 5 5 Step Staircase Gray Scale 1 11 Figure 1 6 OIRE Flat Field 1 12 Figure 1 7 50 IRE Flat Field 1 12 Figure 1 8 Black Burst 1 13 Figure 1 9 Field Square Wave 1 13 Figure 1 10 Multiburst 1 14 Figure 1 11 Convergence Components 1 14 Figure 1 12 Composite 1 15 Figure 1 13 Combination 1 15 Figure 1 14 FCC Composite 1 16 Figure 1 15 Matrix
8. Indicates actual manufacturer s part number TSG 90 PATHFINDER Service Manual Replaceable Electrical Parts CROSS INDEX CODE NUMBER TO MANUFACTURER Mfr Code Manufacturer Address City State Zip Code 04222 AVX CERAMICS 19TH AVE SOUTH MYRTLE BEACH SC 29577 DIV OF AVX CORP P 0 BOX 867 04713 MOTOROLA INC 5005 E MCDOWELL RD PHOENIX AZ 85008 4229 SEMICONDUCTOR PRODUCTS SECTOR 09023 CORNELL DUBILIER ELECTRONICS 2652 DALRYMPLE ST SANFORD NC 27330 DIV FEDERAL PACIFIC ELECTRIC CO 1 566 MAXIM INTEGRATED PRODUCTS INC 120 SAN GABRIEL DRIVE SUNNYVALE CA 94086 22526 BERG ELECTRONICS INC DUPONT 857 OLD TRAIL RD ETTERS PA 17319 24165 SPRAGUE ELECTRIC CO 267 LOWELL ROAD HUDSON NH 03051 32997 BOURNS INC 1200 COLUMBIA AVE RIVERSIDE CA 92507 2114 TRIMPOT DIV 57668 ROHM CORP 8 WHATNEY IRVINE CA 92713 PO BOX 19515 58050 TEKA PRODUCTS INC 45 SALEM ST PROVIDENCE RI 02907 60395 XICOR INC 851 BUCKEYE CT MILPITAS CA 95035 7408 71400 BUSSMANN 114 OLD STATE RD ST LOUIS MO 63178 DIV OF COOPER INDUSTRIES INC PO BOX 14460 15915 LITTELFUSE INC 800 E NORTHWEST HWY DES PLAINES IL 60016 3049 SUB TRACOR INC 78189 ILLINOIS TOOL WORKS INC ST CHARLES ROAD ELGIN IL 60120 SHAKEPROOF DIV 80009 TEKTRONIX INC BRAUN DR BEAVERTON OR 97077 0001 PO BOX 5 91637 DALE ELECTRONICS INC 2064 12TH AVE COLUMBUS NE 68601 3632 PO BOX 609 93907 TEXTRON INC 600 18TH AVE ROCKFORD IL 61108 5181 CAMCAR DIV TK1134 TUSONIX INC 2155 N FORBES BLVD TUCSON AZ 85705
9. T amp R A1C32 283 5114 00 CAP FXD CER MLC 0 1UF 10 50V X7R 1206 SMD 04222 12065 104 1 8 T amp R A1C33 283 5267 00 CAP FXD CER MLC 1UF 80 20 25V Y5V 1206 80009 283 5267 00 SMD T amp R A1C34 283 1055 00 CAP FXD MICA 1270 PF 1 100 V 0 34 X 0 31 80009 283 1055 00 RDL T amp A A1C35 283 0644 01 CAP FXD MICA DI 150PF 1 500V 80009 283 0644 01 A1C36 283 0642 01 CAP FXD MICA DI 33P F 2 500V 09023 CDA10ED330G03 A1C37 283 0674 00 CAP FXD MICA DI 85P F 199 500V 80009 283 0674 00 A1C38 283 0647 01 CAP FXD MICA DI 70PF 1 500V T amp A 09023 CDA15ED700F03 A1C39 283 0646 00 CAP FXD MICA DI 170PF 1 500V 380H X 80009 283 0646 00 460L RDL A1C40 283 0689 00 CAP FXD MICA DI 550PF 1 300V 80009 283 0689 00 A1C41 283 0672 00 CAP FXD MICA DI 200PF 1 500V 80009 283 0672 00 A1C42 283 0689 00 CAP FXD MICA DI 550PF 1 300V 80009 283 0689 00 A1C43 283 0689 00 CAP FXD MICA DI 550PF 1 300V 80009 283 0689 00 A1C44 283 5267 00 CAP FXD CER MLC 1UF 80 20 25V Y5V 1206 80009 283 5267 00 SMD T amp R A1C45 283 5267 00 CAP FXD CER MLC 1UF 80 20 25V Y5V 1206 80009 283 5267 00 SMD T amp R A1C48 283 5114 00 CAP FXD CER MLC 0 1UF 10 50V X7R 1206 SMD 04222 12065C104KAT1A 8MM T amp R A1C49 283 5003 00 CAP FXD CER MLC 0 01UF 10 50V X7R 1206 5M 80009 283 5003 00 D 8MM T amp R A1C50 283 5197 00 CAP FXD CER MLC 330PF 5 100V NPO 1206 5MD 04222 12061A331 AT1A T amp R A1C53 290 5003 00 CAP FXD TANT 47UF 20 10V
10. 13 Check Field Tilt Select the Field Square Wave from the PATHFINDER Press I Set the 1780 waveform display to show one field CHECK using the 1780 voltage cursors that the tilt from the beginning to the end of the White bar is lt 3 57 mV 0 5 IRE ignoring the first and last three lines 14 Check Multiburst Frequency Response a b Select the Multiburst signal from the PATHFINDER press C CHECK using the 1780 voltage cursors that the packets are flat and of equal amplitude 2 to 4 2 MHz 15 Check Total Harmonic Distortion THD a Connect the PATHFINDER Audio Channel 2 to the AA501 Audio Distortion analyzer Attach 6000 resistor between the analyzer s and terminals to represent the system load TSG 90 PATHFINDER Service Manual Performance Verification and Adjustment Procedures m n Set the distortion analyzer to measure THD Set the Tone Frequency Amplitude and ID Click with these steps m Open the Tone Menu by pressing SHIFT TONE ON OFF press the two keys simultaneously m Use the and pp keys to set the TONE FREQ to 50 Hz m Move to the TONE LEVEL selection with the W key m Use the and pp keys to set TONE LEVEL to 0 dBu m Move to the CLICK ON OFF selection with the y key m Use lt and keys if necessary to turn the Click OFF CHECK that the Channel 2 THD is lt 1 Use the A key to move back up to the TONE LEVEL selection Change the P
11. A UD w LS 10 1 5 yi Rao R23 es a Ls voc LS 18 2k 10 0k To R63 vec sv 10k 1o ule ty NC 2 4 I ua 4 NC vss F ov e gepi F Our R53 8 R41 5 R38 R37 3 i 24 9 TONE LEVEL m dos 2 OdBu 111352 CH2 AUDIO OUT 04 o ACH2 OFF i SEVA U2 20 Je TP9 UB 5V 171352 Er 054 vec 47uF U228 CD4013 GND ser alas PGND 9 p a 12 r PGND PGND POWER SUPPLIES 452 10 RST 5VA XX F1 CR4 i LN 057 Toi 1 C56 1 C55 R28 CN 15uF 15uF 4 7uH gt 1 R58 O 1 PGND PGND PGND Thee NICADS 12 2 13 U22A U18 cR SZ GND M aH m ix Hi 4 FOND BROWN 1 Ras 5 9 6V NO PIN 15 2 BAT 10 0 5 4 Nc x L2 C50 PGND PGND CHARGE I 1 mE 3 12 E CLK R44 Nc cc 43 330pF 4 12 i do PGND er 475k NC VOUT 19 lt 7 3 5 5V ALKALINES m Q5 ss VREF lb PGND 1 47UF ae 11 v Hs our K 5V y GND v H Cni BTI BROWN 1 7 GND 8X 1 5V NO PIN 2 15 ORANGE 772715 CHASSISGND SEE ELECTRICAL PARTS LIST FOR EARLIER YELLOW 4 r VALUES AND SERIAL NUMBER RANGES EREEN 535 P O A1 MAIN BOARD G TSG 90 TEST SIGNAL AND AUDIO OUT POWER SUPPLY A1 n Replaceable Mechanical Parts 7 gt
12. R56 B5 C1 C34 D2 Lit B5 C1 R57 c5 C1 C35 D1 D3 R58 C1 C36 E1 D3 F3 B2 Reg B3 61 C37 E1 Q4 F4 B1 C38 E1 ca 05 C5 D2 TP3 C1 E4 C39 E1 C4 Q6 B5 TP4 C1 E4 C40 E1 C4 TP5 F1 C3 C41 D1 D4 R6 C1 E4 TP6 F1 C4 R7 G2 B3 TP7 D3 D1 C42 D2 E4 R8 G2 B3 TP8 D3 D1 C43 E1 D4 R9 G2 A4 TP9 G4 B3 C44 C1 R10 G2 TP10 G4 B2 C45 C1 E4 Rf G2 G5 B2 C48 5 D2 R13 H1 TP12 G5 B2 C49 F5 D2 R14 G1 B3 C50 F5 C2 Utt G1 B3 C53 F5 C2 R15 B3 Di u12 E1 C54 F4 C3 R16 A1 E3 U13A B3 C55 C5 C2 R18 F2 A2 U13B G3 B3 C56 C5 C2 R20 G3 B2 014 B1 C57 B5 Ci R21 H3 B2 015 C1 F4 C58 E3 B2 R22 E3 B2 u16 B3 D1 C59 Hi R23 G3 A2 U17A F3 B2 R24 G3 A2 U17B G4 B2 CR1 F5 C2 R32 B1 Fa Ut8 5 C2 CR2 F5 C2 U20 A2 B3 CR3 B5 R33 B1 U22A D5 D2 CR4 D4 C2 R34 C1 E4 U22B D4 D2 CR7 5 R35 B1 E3 R36 F3 B2 CR15 Di R37 F3 B1 R38 E3 B1 F1 B5 C1
13. 00 B023289 DISP LAY MODULE 80009 119 5566 00 1 671 2585 00 010100 010456 CIRCUIT BD ASSY MAIN 80009 671 2585 00 1 671 2585 01 010457 020729 CIRCUIT BD ASSY MAIN 80009 671 2585 01 1 671 2585 02 020730 021355 CIRCUIT BD ASSY MAIN 80009 671 2585 02 1 671 2585 03 021356 CIRCUIT BD ASSY MAIN 80009 671 2585 03 STANDARD ONLY 1 671 2896 00 B010100 B010456 CIRCUIT BD ASSY MAIN 80009 671 2896 00 1 671 2896 01 010457 020729 CIRCUIT BD ASSY MAIN 80009 671 2896 01 1 671 2896 02 020730 021355 CIRCUIT BD ASSY MAIN 80009 671 2896 02 1 671 2896 03 021356 021564 CIRCUIT BD ASSY MAIN 80009 671 2896 03 1 671 2896 04 021565 CIRCUIT BD ASSY MAIN 80009 671 2896 04 OPTION 1J ONLY ATTACHED PARTS 131 5527 00 JACK POWER DC 80009 131 5527 00 END ATTACHED PARTS 1 1 283 5267 00 CAP FXD CER MLC 1UF 80 20 25V Y5V 1206 80009 283 5267 00 SMD T amp R A1C2 283 5114 00 CAP FXD CER MLC 0 1UF 10 50V X7R 1206 5MD 04222 12065C 104KAT1A 8MM TER A1C4 283 5114 00 CAP FXD CER MLC 0 1UF 10 50V X7R 1206 5MD 04222 12065C 104KAT1A 8 TER A1C5 283 5114 00 CAP FXD CER MLC 0 1UF 10 50V X7R 1206 5MD 04222 12065C 104KAT1A 8 TER A1C7 283 5107 00 CAP FXD CER MLC 22PF 5 100V NPO 1206 5MD 04222 120614220 8MM T amp R A1C8 283 5267 00 CAP FXD CER MLC 1UF 80 20 25V Y5V 1206 80009 283 5267 00 SMD T amp R A1C9 283 5267 00 CAP FXD CER MLC 1UF 80 20 25V Y5V 1206 80009 283 5267 00 SMD T amp R
14. 00 RES FXD THK FILM 10 0K 80009 321 5030 00 0HM 1 0 125W TC 100 PPM 1206 T amp R A1R52 311 5033 00 RES VAR TRMR CERMET 500 32997 3314 1 5016 OHM 25 0 25W 4MM 50 ADJ SMD T amp R 5 8 TSG 90 PATHFINDER Service Manual Replaceable Electrical Parts Component Tektronix Serial Assembly Number Mfr Mfr Part Number Part Number gt Effective Discontinued amp Description Code Number A1R53 311 5038 00 671 2585 00 671 2585 03 TRMR CERMET 20K 80009 311 5038 00 OHM 25 0 25W 4MM 50 AD SMD T amp R A1R53 311 5040 00 671 2585 04 RES VAR TRMR CERMET 10K 32997 3314 1 103E OHM 25 0 25W 4MM 50 ADJ SMD T amp R A1R53 311 5038 00 671 2896 00 671 2896 03 RES VAR TRMR CERMET 20K 80009 311 5038 00 OHM 25 0 25W 4MM 50 ADJ SMD T amp R A1R53 311 5040 00 671 2896 04 RES VAR TRMR CERMET 10K 32997 3314 1 103E OHM 25 0 25W 4MM SQ TOP ADJ SMD T amp R A1R54 321 5026 00 RES FXD THK FILM 4 75K 80009 321 5026 00 OHM 1 0 125W TC 100 PPM 1206 T amp R A1R55 321 5026 00 RES FXD THK FILM 4 75K 80009 321 5026 00 0HM 1 0 125W TC 100 PPM 1206 T amp R A1R56 321 5015 00 RES FXD THK FILM 562 OHM 1 0 125W TC 2100 80009 321 5015 00 PPM 1206 T amp R A1R57 321 5000 00 RES FXD THK FILM 10 0HM 1 0 125W TC 100 51668 MCR18EZHFW10E PPM 1206 T amp R A1R58 321 5001 00 RES FXD THK FILM 12 1 0HM 196 0 125W TC 100 57668 M
15. 1 0 125W TC 100 PPM 1206 T amp R A1R22 321 5031 00 671 2896 01 RES FXD THK FILM 12 1K 80009 321 5031 00 0HM 1 0 125W TC 100 PPM 1206 T amp R A1R23 321 5030 00 RES FXD THK FILM 10 0K 80009 321 5030 00 0HM 1 0 125W TC 100 PPM 1206 T amp R A1R24 321 5030 00 RES FXD THK FILM 10 0K 80009 321 5030 00 0HM 1 0 125W TC 100 PPM 1206 T amp R A1R25 321 5022 00 RES FXD THK FILM 2 21K 80009 321 5022 00 0HM 1 0 125W TC 100 PPM 1206 T amp R A1R26 321 5000 00 RES FXD THK FILM 10 OHM 1 0 125W TC 100 51668 MCR18EZHFW10E PPM 1206 T amp R 1828 321 5048 00 RES FXD THK FILM 332K 0HM 1 0 125W TC 100 80009 321 5048 00 PPM 1206 T amp R A1R29 321 5047 00 RES FXD THK FILM 100K OHM 1 0 125W TC 100 80009 321 5047 00 PPM 1206 T amp R A1R30 321 5030 00 RES FXD THK FILM 10 0K 80009 321 5030 00 0HM 1 0 125W TC 100 PPM 1206 T amp R 1832 321 5027 00 RES FXD THK FILM 5 62K 80009 321 5027 00 0HM 1 0 125W TC 100 PPM 1206 T amp R TSG 90 PATHFINDER Service Manual 5 7 Replaceable Electrical Parts Component Tektronix Serial Assembly Number Mfr Mfr Part Number Part Number gt Effective Discontinued amp Description Code Number A1R33 321 5023 00 RES FXD THK FILM 2 74K 80009 321 5023 00 0HM 1 0 125W TC 100 PPM 1206 T amp R A1R34 321 5023 00 RES FXD THK FILM 2 74K 80009 321 5023 00 0HM 1 0 125W TC 100 PPM 1206 T amp R A1R35 321 5027 00 RES FXD THK FILM 5 62K 80009 321 5027 00
16. C4 529 C4 B5 815 D3 C3 S30 D4 C5 51 1 1 516 D2 C3 S31 D3 C4 S2 1 1 517 D2 C2 S32 D3 C3 S3 A2 A2 S18 D1 833 D2 C3 S4 A2 519 D1 C1 S34 D2 C2 S5 A3 A3 S20 D1 B1 S6 A3 A4 S35 D1 c2 S7 A4 A5 S21 C1 B1 536 C1 B1 S8 A4 C1 522 B1 A1 S37 C2 B2 S9 B4 A5 Se3 B1 A1 S38 C2 B3 510 C4 B5 S24 B2 A2 S39 C3 B3 S25 B2 A3 S40 C3 B4 S11 D4 C5 S26 B3 A3 541 G2 A5 512 D4 C5 S27 B3 A4 513 4 C5 S28 B4 A5 TSG 90 TSG 90 Eu 522 ID ON OFF ID MENU 521 ID EDIT ID POSITION 82 OTHER SIGNAL E 523 ONE ON OFF TONE MENU 936 RECALL STORE ON KEY REV AUG 1993 KEY BOARD A2 KEY BOARD A2 J2 MAIN BOARD R59 C57 R58 R57 1 als R3B R25 5 tn cu 2 oa vis C18 el 04 C61
17. IDCLK 7 5 14 m OSCOUT eno 2 Lco 2116 COL2 0 1uF 2197 N UPD78CP14L v 2138 COL3 uPCLK 34 Dx ppo 159 2119 JuPCLK 38 60 UPDI 1 2120 xe PD 62 EN 22 2 PD2 63 UPD3 64 2 mer gt pos spam Res U19 6 PDS 66 190 67 VIN PO POTCS C57 Ws 52 CIDCS 332k pro 93 POTOS Pra 54 ICDBL LCDBL ot BATTLO 37 55 y A3 LCD BOARD 38 56 51 5 38 ANI 38 El R29 39 ana pre 57 100k 40 ana ana m ANS ALE 43 ans RD p48 44 ANT wR 599 ion v SIGNAL SEGMENT 2 Rowo PAO y 32 49 AVREF par El ADDRESS MEMORY 45V o U20 2 36 5 ROWS 55 DIGITAL TIMING 9 BM EZ ROWS 617 10 PES ROWS 2372 DS 1 ROW 04 sac MET COLO X24C04S8 ur 1 0uF MODE so 12 COLI i Tras 27C512PLCC 4 i RESET 31 d RESET 18 2 LFAO Do 13 LFDO e STOP PB3 A2 10 x 4 is 4 014 9 1 4 D 75 28 16 6 DIO 7 8 18 559 5 SCL D3 28 FES ir d 7 19 4 NVSDA 5 8 5 6 4 D4 26 5 p PB7 4 5 spa 8 5 6 45 Ds 20 1 19 AEAT OFF ds q we ME 4 100 421 4B 06 22 20 D7 75 14 LFAB 25 PCI RXD Q4 A0 WS l O 100 PC2 SCK 21 TN Q5 DS 76 A1 CS2 l O ENG LS SCK C82 O1 A9 5V 22 D5
18. Performance Verification and Adjustment Procedures 3 1 Required Test Equipment 3 1 Performance Verification Checklist 3 2 Oscillator Frequency 3 2 Test Signals 3 2 Audio 3 3 Performance Verification Procedures 3 4 Oscillator Frequency 3 4 Test Signals c ad mmm RES as has ose ape 3 4 Audio 3 6 Adjustment Checklist 3 9 Adjustment Procedures 3 10 Maintenance 4 1 Battery Hints 5e gene eibi 4 1 Preventive Maintenance 4 1 Cleaning t eot botes 4 1 Static Sensitive Components 4 2 Troubleshooting Aids 4 2 Foldout Pages user repe y eere cs 4 2 Diagrams ive oca eh v rede Estes et etis 4 3 Circuit Board Illustrations 4 3 Numbering pere ia ere e tole t ultor 4 3 Rev Apr 1994 TSG 90 PATHFINDER Service Manual iii Contents Diagnostics en A Ee E RE 4 4 Diagnostic Menu 4 4 Corrective Maintenance 4 5 Obtaining Replacement Parts
19. R1234 w Circuit Assembly Number Subassembly Number Number Read Resistor 1234 of Subassembly 2 of Assembly 23 The electrical parts list is arranged by assemblies in numerical sequence 1 with its subassemblies and parts precedes A2 with its subassemblies and parts Mechanical subparts to the circuit boards are listed in the electrical parts list These mechanical subparts are listed with their associated electrical part for example fuse holder follows fuse Chassis mounted parts and cable assemblies have no assembly number prefix and are located at the end of the electrical parts list Indicates part number to be used when ordering replacement part from Tektronix Column three 3 indicates the serial or assembly number at which the part was first used Column four 4 indicates the serial or assembly number at which the part was removed No serial or assembly number entered indicates part is good for all serial numbers An item name is separated from the description by a colon Because of space limitations an item name may sometimes appear as incomplete Use the U S Federal Catalog handbook H6 1 for futher item name identification The mechanical subparts are shown as ATTACHED PARTS END AT TACHED PARTS or MOUNTING PARTS END MOUNTING PARTS in column five 5 Indicates the code number of the actual manufacturer of the part Code to name and address cross reference can be found immediately after this page
20. Rise Time Output Impedance Return Loss S ubcarrier Stability 140 ns 20 ns 7 7 Over a temperature range of 0 to 445 C Annual adjustment required 3 579545 MHz 10 Hz Signal to Noise Ratio Chrominance to Luminance Delay 2 60 dB Signal passed through a continuous random noise measurement low pass filter F 5 MHz 10 ns typical Measured with the NTC7 Composite signal SCH Phase Frequency Response Flat within 296 to 4 2 MHz Field Tilt lt 0 5 Line Tit 5 Step Linearity Error sep matching Differential Gain lt 1 Differential Phase lt 19 2T Pulse K Factor lt Ringing lt 1 5 peak Luminance Rise Time 250 ns 25 ns except where otherwise specified Chrominance Rise Time 5 ta 400 ns 40 ns except where otherwise specified Burst Rise Time Digitally derived 400 ns 40 ns Line Timing Digitally derived See Figures 1 1 through 1 16 Front Porch Duration 15 us 0 1 us Line Blanking Interval Breezeway Duration Digitally derived 10 9 us 0 2 us measured at the 20 IRE point of active video itally derived 600 ns 100 ns Line Sync Duration Vertical Serration Duration Equalizing Pulse Duration Burst Delay from Sync Duration 9 Digitally derived 4 7 us 100 ns at half amplitude 4 7 us 100 ns athalFampltude 23 us 100 ns at halfamplitude Digita deve 5 308 us 35 ns 19 cycles of sub
21. Signal Select mode the default operating mode for the PATHFINDER The PATHFINDER powers up in this mode and returns to it after exiting any of the other modes While in the Signal Select mode the Bars button selects SMPTE Bars and 7596 Bars and the Other Signals button scrolls through the remaining test signals The arrow keys will also scroll forward and backward through the signal list In addition the alphanumeric keys may be used to select signals directly eliminat ing the need to scroll through all the signals to get to the one you want Standard A SMPTE Bars I Field Square Wave B 75 Bars J 50 IRE Flat Field C Multiburst K 0 IRE No Burst D NTC7 Composite L Black Burst E NTC7 Combination M SIN X X F FCC Composite N Convergence G 5 Step O Matrix H Red Field P Safe Area Option 1J SN B021565 amp above A SMPTE Bars I Red Field B 75 Bars J Field Square Wave C SNG Bars 50 IRE Flat Field D Multiburst L Black Burst E NTC7 Composite M SIN X X F NTC7 Combination N Convergence G FCC Composite O Matrix 5 Step P Safe Area ID On Off and ID Menu The ID On Off button toggles the character ID messages captions on and off The LCD display will read ID off ID on for a single text ID message or ID cyc 1f cycle has been turned on in the ID Menu The ID Menu is accessed by pressing the Shift button before pressing the ID On Off Rev Apr 1994 TSG 90 PATHFINDER Service Manual 2 3 Operating Information 2 4 button T
22. TK1920 TOKIN OF AMERICA 2261 FORTUNE DR SAN JOSE 95131 TSG 90 PATHFINDER Service Manual 5 3 Replaceable Electrical Parts Component Tektronix Serial Assembly Number Mfr Mfr Part Number Part Number Effective Discontinued amp Description Code Number Al 671 2585 00 B010100 B010456 CIRCUIT BD ASSY MAIN 80009 671 2585 00 1 671 2585 01 010457 020729 CIRCUIT BD ASSY MAIN 80009 671 2585 01 1 671 2585 02 020730 021355 CIRCUIT BD ASSY MAIN 80009 671 2585 02 1 671 2585 03 021356 021854 CIRCUIT BD ASSY MAIN 80009 671 2585 03 1 671 2585 04 021855 023288 CIRCUIT BD ASSY MAIN 80009 671 2585 03 1 671 2585 05 023289 CIRCUIT BD ASSY MAIN 80009 671 2585 03 STANDARD ONLY 1 671 2896 00 010100 B010456 CIRCUIT BD ASSY MAIN 80009 671 2896 00 1 671 2896 01 010457 020729 CIRCUIT BD ASSY MAIN 80009 671 2896 01 1 671 2896 02 020730 021355 CIRCUIT BD ASSY MAIN 80009 671 2896 02 1 671 2896 03 021356 021564 CIRCUIT BD ASSY MAIN 80009 671 2896 03 1 671 2896 04 021565 023288 CIRCUIT BD ASSY MAIN 80009 671 2896 04 1 671 2896 05 023289 CIRCUIT BD ASSY MAIN 80009 671 2896 05 OPTION 1J ONLY A2 671 2586 00 B010100 021651 CIRCUIT BD ASSY KEYBOARD 80009 671 2586 00 A2 671 2586 01 B021652 CIRCUIT BD ASSY KEYBOARD 80009 671 2586 01 A3 119 4506 00 B010100 B023288 DISP LAY MODULE 80009 119 4506 00 A3 119 5566
23. c14 ep 323 8 U22 18 C50 R45 a 5 R24 R23 R18 R20 R36 5 R21 54 R13 utt 81059 47 C6 R10 TPS TPA U20 RQ C7 01 TP6 4 Static Sensitive Devices A1 MAIN BOARD See Maintenance Section A1 MAIN BOARD Component Locator Partial Assembly A1 also shown on schematic lt 2 gt The schematic diagram has an alpha numeric grid to assist in locating parts within that diagram Comp Diag Diag Bd Comp Diag Diag Bd Comp Diag Diag Bd Comp Diag Diag Bd Comp Diag Diag Bd Comp Diag Diag No No Loc Loc No No Loc Loc No No Loc Loc No No Loc Loc No No Loc Loc No No Loc Loc C1 1 F5 F2 ca 2 Di D4 J 2 Hi Rt 2 G2 R44 2 E5 C2 U5 1 H5 D2 1 G5 03 C42 2 02 E4 J 2 H3 B2 R13 2 R45 2 C5 C2 U6 1 D4 D3 C4 2 2 El D4 J 2 H3 Bl R14 2 Gi R50 2 Bi U7 1 H3 C5 2 B2 C44 2 Ci 2 R15 2 D1 R51 2 C5 DI C6 2 G2 B3 C45 2 E4 R16 2 A1 R52 2 Gi 08 1 ES C7 2 G2 4 L2 2 G4 B3 R18 2 F2 2 R53 2 2 Gi B3 C8 2 2 ES D2 2 G5 2 R54 2 G3 2 112 2 El C9 2 C49 2 F5 D2 14 2 El R20 2 B2 R55 2 G4 2 2 F3 B3 C10 2 B2 B3 C50 2 F5 C2 15 2 El R21 2 H3 B2 R56 2 B5 C1 U13B 2 G3 B3 2 A1 C53 2 F5 C2 L6 2 Di D3 R22 2 E3 B2 R57 2 C5 Ut4 2
24. cover to the front cover 2 Gently separate the back cover about 1 inch from the PATHFINDER taking care to not pull the rear panel connector panel away with it 3 Disconnect the battery cable from J10 Make sure to pull on the connector housing to do this not the wires The back cover is now free and may be moved away from the instrument 4 Replacement is the reverse of removal TSG 90 PATHFINDER Service Manual 4 5 Maintenance Connector Panel Removal and Replacement Main Board and LCD Removal and Replacement 4 6 Keypad Removal Keypad Replacement Follow this procedure to remove and replace the connector rear panel of the PATHFINDER 1 With the back cover removed disconnect the VIDEO and both AUDIO connector cables from J7 J8 and J9 Again pull on the connector housing not on the wires Slide the assembly up away from the front panel Replacement is the reverse of removal Follow this procedure to remove and replace the Main board and LCD of the PATHFINDER 1 After removing the rear panel use a pair of needle nose pliers to gently pull the J2 housing up away from the instrument Pull straight up lifting the Main board at the same time Do NOT bend the connector housing When J2 pulls free lift the Main board and the LCD display away from the case To separate the Main board and LCD display module disconnect the LCD display cable from J6 and gently pull the two assemblies
25. immediately after this page The cross index provides codes names and addresses of manufacturers of components listed in the mechanical parts list Abbreviations Abbreviations confrorm to American National Standards Institute ANSI standard Y 1 1 Chassis Parts Chassis mounted parts and cable assemblies are located at the end of the Replaceable Electrical Parts list TSG 90 PATHFINDER Service Manual 7 1 Replaceable Mechanical Parts Column Descriptions Figure amp Index No Column 1 Tektronix Part No Column 2 Serial No Column 3 and 4 Qty Column 5 Name and Description Column 6 Mfr Code Column 7 Mfr Part Number Column 8 7 2 Items in this section are referenced by figure and index numbers to the illustra tions Indicates part number to be used when ordering replacement part from Tektronix Column three 3 indicates the serial number at which the part was first used Column four 4 indicates the serial number at which the part was removed No serial number entered indicates part is good for all serial numbers This indicates the quantity of mechanical parts used An item name is separated from the description by a colon Because of space limitations an item name may sometimes appear as incomplete Use the U S Federal Catalog handbook H6 1 for further item name identification Following is an example of the indentation system used to indicate relationship 12345 Name
26. in areas that have a floor or work surface covering capable of generating a static charge m Use a soldering iron that is connected to earth ground m Use only special antistatic suction type or wick type desoldering tools The following is miscellaneous information about schematics circuit board il lustrations component numbering and assembly numbering NOTE No repair should be attempted during the warranty period The foldout pages at the back of the manual contain block and schematic dia grams and circuit board illustrations TSG 90 PATHFINDER Service Manual Maintenance Diagrams The circuit number and electrical value of each component is shown on the sche matic diagrams The first page in the Diagrams section explains the schematic symbols and notations found on the diagrams The Replaceable Electrical Parts list gives a complete description of each component Circuit boards and assem blies are shown with a heavy border for identification If the border does not completely encircle the schematic then that schematic only portrays part of the circuitry on that board or assembly The name and assembly number of the cir cuit board are shown along the border as well as the serial number range that the schematic represents NOTE Check the Change Information section at the rear of the manual for inserts describing corrections and modifications to the instrument and manual Circuit Board Illustrations Electrica
27. 0 and 90 of the sync pulse are 140 ns 20 ns 8 Check SCH Phase a Setthe 1780 to measure SCH Phase b CHECK that the SCH Phase of the PATHFINDER Video Output is 0 57 9 Check Chrominance to Luminance Delay and Gain a Select the NTC7 Composite signal from the PATHFINDER press D b Setthe 1780 to view the bottom of the modulated pulse Usethe Chroma Luma measurement mode of the 1780 to measure both Y C delay and gain d CHECK that the Chroma Luma delay is lt 15 ns and the gain is X246 TSG 90 PATHFINDER Service Manual 3 5 Performance Verification and Adjustment Procedures 3 6 Audio Outputs 10 Check K Factor a b With the NTC7 Composite signal still displayed set the 1780 for K Factor measurement CHECK that the PATHFINDER K Factor is lt 0 5 11 Check Differential Phase and Gain a d Set the 1780 Vectorscope mode to measure differential phase Use the double trace method if possible CHECK for differential phase of lt 1 Set the 1780 Vectorscope mode to measure differential gain Use the double trace method if possible CHECK for differential gain of lt 1 12 Check Line Tilt a With the NTC7 Composite signal still displayed set the 1780 waveform display to show the White bar CHECK using the 1780 voltage cursors that the tilt from the beginning to the end of the White bar is lt 3 57 mV 0 5 IRE ignoring the first and last us
28. 0 287 X 80009 290 5003 00 0 169 7343 5MD 13MM T amp R A1C54 290 5003 00 CAP FXD TANT 47UF 20 10V 0 287 X 80009 290 5003 00 0 169 7343 SMD 13MM TGR A1C55 290 5009 00 CAP FXD TANT 15UF 20 25V 0 287 X 24165 293D156X0025D2T 0 169 7343 SMD T amp R A1C56 290 5009 00 CAP FXD TANT 15UF 20 25V 0 287 X 24165 293D156X0025D2T 0 169 7343 SMD T amp R 1 57 283 5114 00 CAP FXD CER MLC 0 1UF 10 50V X7R 1206 SMD 04222 12065C104KAT1A 8MM T amp R A1C58 283 5114 00 671 2585 00 671 2585 00 CAP FXD CER MLC 0 1UF 10 50V X7R 1206 SMD 04222 12065C104KAT1A 8MM T amp R A1C58 283 5211 00 671 2585 01 CAP FXD CER MLC 4700PF 10 50V X7R 1206 8M 80009 283 5211 00 M TGR A1C58 283 5114 00 671 2896 00 671 2896 00 CAP FXD CER MLC 0 1UF 10 50V X7R 1206 SMD 04222 12065C104KAT1A 8MM T amp R A1C58 283 5211 00 671 2896 01 CAP FXD CER MLC 4700PF 10 50V X7R 1206 8M 80009 283 5211 00 M T amp R A1CR1 152 5027 00 DIO RECT SCHTKY 40V 1A MBRS140 SMB 80009 152 5027 00 LEAD 12MM TR A1CR2 152 5027 00 DIO RECT SCHTKY 40V 1A MBRS140 SMB 80009 152 5027 00 LEAD 12MM TR A1CR3 152 5018 00 DIO SIG ULTRA FAST 100V 0 74VF ANS 2 0PF SER 80009 152 5018 00 TSG 90 PATHFINDER Service Manual PR MMBD1203 H SOT 23 8MM T amp R 5 5 Replaceable Electrical Parts Component Tektronix Serial Assembly Number Mfr Mfr Part Number Part Number gt Effective Discontinued Name amp Description Code Number A1CR4 152 5027 00 DIO RECT SCHTKY 40V 1A MBRS1
29. 0 mV no burst 50 IRE Flat Field See Figure 1 7 Amplitude 357 2 mV Black Burst See Figure 1 8 Amplitude 53 57 mV 7 5 IRE Rev Apr 1994 1 4 TSG 90 PATHFINDER Service Manual Specifications Table 1 2 Cont Video Test Signals Characteristic Performance Information Field Square Wave See Figure 1 9 Field Timing Lines White Lines 70 213 Lines at Blanking All remaining active lines Amplitude 714 3 mV 100 IRE Multiburst See Figure 1 10 Amplitudes White Reference Bar 500 mV 70 IRE Packets 428 6 MV p p 60 IRE Equal width packets Pedestal 285 7 mV 40 IRE Burst Frequencies Packet Rise Time 0 5 1 0 2 0 3 0 3 58 and 4 2 MHz 0 5 MHz 140 ns typical sine squared shaped packets All Other Packets 400 ns typical sine squared shaped packets Convergence See Figure 1 11 Amplitude 549 3 mV 76 9 IRE Pattern Crosshatch 14 horizontal lines and 17 vertical lines per field Pulse HAD 225 ns 25 ns NTC7 Composite See Figure 1 12 Bar Amplitude 714 3 mV 100 IRE Rise Time 125 ns 25 ns 2T Pulse Amplitude 714 3 mV 100 IRE HAD 250 ns 25 ns Modulated S in Pulse Phase 60 80 1 Amplitude 714 3 mV 100 IRE measured at peak amplitude HAD 1 563 us 150 ns Modulate 5 Step Staircase Luminance 642 9 mV 90 IRE Chrominance 285 7 mV 40 IRE NTC7 Combination See Figure 1 13 Multiburst Amplitudes White Bar 714 3 mV 100 IRE Packets 357 2 50 IRE Pedestal 357 2 mV 50 IRE BurstFrequencies 0 5 1 0
30. 0HM 1 0 125W TC 100 PPM 1206 T amp R A1R36 321 5024 00 671 2585 00 671 2585 00 RES FXD THK FILM 3 32K 80009 321 5024 00 0HM 1 0 125W TC 100 PPM 1206 T amp R A1R36 321 5021 00 671 2585 01 RES FXD THK FILM 1 82K 80009 321 5021 00 0HM 1 0 125W TC 100 PPM 1206 T amp R A1R36 321 5024 00 671 2896 00 671 2896 00 RES FXD THK FILM 3 32K 80009 321 5024 00 0HM 1 0 125W TC 100 PPM 1206 T amp R A1R36 321 5021 00 671 2896 01 RES FXD THK FILM 1 82K 80009 321 5021 00 0HM 1 0 125W TC 100 PPM 1206 T amp R A1R37 321 5024 00 671 2585 00 671 2585 00 RES FXD THK FILM 3 32K 80009 321 5024 00 0HM 1 0 125W TC 100 PPM 1206 T amp R A1R37 321 5021 00 671 2585 01 RES FXD THK FILM 1 82K 80009 321 5021 00 0HM 1 0 125W TC 100 PPM 1206 T amp R A1R37 321 5024 00 671 2896 00 671 2896 00 RES FXD THK FILM 3 32K 80009 321 5024 00 0HM 1 0 125W TC 100 PPM 1206 T amp R A1R37 321 5021 00 671 2896 01 RES FXD THK FILM 1 82K 80009 321 5021 00 0HM 1 0 125W TC 100 PPM 1206 T amp R A1R38 321 5029 00 671 2585 00 671 2585 00 RES FXD THK FILM 8 25K 80009 321 5029 00 0HM 1 0 125W TC 100 PPM 1206 T amp R A1R38 321 5031 00 671 2585 01 RES FXD THK FILM 12 1K 80009 321 5031 00 0HM 1 0 125W TC 100 PPM 1206 T amp R A1R38 321 5029 00 671 2896 00 671 2896 00 RES FXD THK FILM 8 25K 80009 321 5029 00 0HM 1 0 125W TC 100 PPM 1206 T amp R A1R38 321 5031 00 671 2896 01 RES FXD THK FILM 12 1K 80009 321 5031 00 0HM 1 0 125W TC 100 PPM 1206 T amp R A1R39 321 5032 00 671 2585 00 6
31. 1 10 283 5267 00 CAP FXD CER MLC 1UF 80 20 25V Y5V 1206 80009 283 5267 00 SMD T amp R A1C11 283 5267 00 CAP FXD CER MLC 1UF 80 20 25V Y5V 1206 80009 283 5267 00 SMD T amp R A1C12 283 5260 00 CAP FXD CER MLC 10UF 80 20 25V 25U 5 9X2 1920 1 1062 50 205 7MM SM2210 SMD T amp R A1C14 283 0352 00 671 2585 00 671 2585 01 CAP FXD CER DI 86PF 5 100V TK1134 8121BXXXP 380860 A1C14 283 0352 00 671 2896 00 671 2896 01 CAP FXD CER DI 86PF 5 100V TK1134 8121BXXXP 380860 1 15 283 5267 00 CAP FXD CER MLC 1UF 80 20 25V Y5V 1206 80009 283 5267 00 SMD T amp R 1 16 283 5267 00 CAP FXD CER MLC 1UF 80 20 25V Y5V 1206 80009 283 5267 00 SMD T amp R 5 4 TSG 90 PATHFINDER Service Manual Replaceable Electrical Parts Component Tektronix Serial Assembly Number Mfr Mfr Part Number Part Number gt Effective Discontinued amp Description Code Number A1C17 283 5114 00 CAP FXD CER MLC 0 1UF 10 50V X7R 1206 SMD 04222 12065 104 1 8 T amp R 1 18 283 5114 00 CAP FXD CER MLC 0 1UF 10 50V X7R 1206 SMD 04222 12065 104 1 8 T amp R 1 29 283 5114 00 CAP FXD CER MLC 0 1UF 10 50V X7R 1206 SMD 04222 12065 104 1 8MM T amp R A1C30 283 5114 00 CAP FXD CER MLC 0 1UF 10 50V X7R 1206 SMD 04222 12065 104 1 8 T amp R A1C31 283 5114 00 CAP FXD CER MLC 0 1UF 10 50V X7R 1206 SMD 04222 12065 104 1 8
32. 1 0 1036 No 13 12 5 71 037 7 LFA7 Sq ceo y RDY BUSY RCLK 1038 74 45V 12 c PWRDN SIGNAL SEGMENT ST mi RDATA MEMORY 33 m2 1 0 vec 64 5V si vec 5v 0 94 RESET 73 ano 43 55 DONE PG us AT27HC642R 35DC l m 800 7 10 SDi I 9 a 2 02 18 SD3 D2 4 14 08 a 504 D3 3 15 5 5 05 2 Ds E 5 p Li7 857 5V A10 11 L ca A12 T S CS VPP NOTE SEE PARTS LIST FOR EARLIER VALUES TSG 90 AND SERIAL NUMBER RANGES CPU TIMING DIGITAL AND ID GENERATION A1 MAIN BOARD A1 Schematic Diagram lt 2 gt Main Board Component Locator Chart The schematic diagram has an alpha numeric grid to assist in locating parts within that diagram Assembly Partial Assembly A1 also shown on Schematic lt 1 gt TSG90 Comp Diag Bd Comp Diag Bd Comp Diag No Loc Loc No Loc Loc No Loc Loc C4 C1 E3 J5 5 Bt R39 F3 C5 B2 J H1 A3 R40 G4 M C6 G2 B3 J8 H3 B2 R41 G3 B1 C7 G2 A4 J9 H3 B1 C8 G1 B3 J10 5 Bt R42 G4 2 C9 G1 B3 R43 H4 B2 C10 B2 B3 L2 G4 B3 R44 5 C2 F3 13 G5 B2 R45 c5 c2 C12 E3 B2 L4 E1 C3 R50 D3 B1 C14 Di L5 E1 C3 51 D1 L6 D1 D3 R52 G1 A3 C15 F3 B2 17 D1 D3 R53 B3 C1 C16 F3 B2 L8 D2 D3 R54 A2 C17 D3 Di L9 F5 D2 R55 G4 A2 C18 D3 Di L10 D3 Bt
33. 2 0 3 0 3 58 and 4 2 MHz Packet Rise Times 0 5 and 1 0 MHz 140 ns typical sine squared shaped packets TSG 90 PATHFINDER Service Manual 1 5 Specifications Table 1 2 Cont Video Test Signals Characteristic All Other Packets Modulated P edestal Pedestal Amplitude Chrominance Amplitudes Performance Information 400 ns typical sine squared shaped packets 357 2 mV 50 IRE 142 9 mV 20 IRE 285 7 mV 40 IRE and 571 4 mV 80 IRE Phase 90 Rise Time 400 ns 40 ns FCC Composite See Figure 1 14 Bar Amplitude 114 3 mV 100 Rise Time 250 ns 25 ns 2T Pulse Amplitude 714 3 mV 100 IRE HAD 250 ns 25 ns Modulated Sin Pulse Phase 60 80 1 Amplitude 714 3 mV 100 IRE HAD 1 563 us 150 ns Modulate 5 Step Staircase Luminance 571 4 mV 80 IRE Chrominance 285 7 mV 40 IRE Rise Time 375 ns 37 5 ns Matrix See Figure 1 15 Safe Area See Figure 1 16 Amplitude 549 1 mV 76 9 IRE Safe Title Horizontal Bar Vertical Timing Safe Action Horizontal Bar Vertical Timing Table 1 3 Character Identification Characteristic Number of Characters Displayed Lines 45 and 238 14 925 and 56 525 us Lines 33 and 250 12 325 and 59 125 us Information Two lines of up to 16 characters per line Display Position Character Amplitude 1 6 Movable over the Safe Action area ofthe field The first line may also be displayed in the Vertical Blanking Interval Black 53 6 mV 7 5 IRE Whit
34. 22 00 0HM 1 0 125W TC 100 PPM 1206 T amp R A1R13 321 5113 00 RES FXD THK FILM 75 OHM 1 0 125W TC 100 80009 321 5113 00 PPM 1206 T amp R A1R14 321 5113 00 RES FXD THK FILM 75 0HM 1 0 125W TC 100 80009 321 5113 00 PPM 1206 T amp R AIR15 317 0512 00 671 2585 00 671 2585 01 RES FXD CMPSN 5 1K OHM 5 0 125 80009 317 0512 00 1 15 317 0512 00 671 2896 00 671 2896 01 RES FXD CMPSN 5 1K OHM 590 0 125 80009 317 0512 00 1 16 321 5000 00 RES FXD THK FILM 10 OHM 1 0 125W TC 100 51668 MCR18EZHFW10E PPM 1206 T amp R A1R18 321 5032 00 671 2585 00 671 2585 00 RES FXD THK FILM 15 0K 80009 321 5032 00 0HM 1 0 125W TC 100 PPM 1206 T amp R A1R18 321 5033 00 671 2585 01 RES FXD THK FILM 18 2K 80009 321 5033 00 0HM 1 0 125W TC 100 PPM 1206 T amp R A1R18 321 5032 00 671 2896 00 671 2896 00 RES FXD THK FILM 15 0K 80009 321 5032 00 0HM 1 0 125W TC 100 PPM 1206 T amp R A1R18 321 5033 00 671 2896 01 RES FXD THK FILM 18 2K 80009 321 5033 00 0HM 1 0 125W TC 100 PPM 1206 T amp R A1R20 321 5315 00 RES FXD FILM 24 9 OHM 196 0 125W SMD 1206 91637 24 9 OHM A1R21 321 5315 00 RES FXD FILM 24 9 OHM 196 0 125W SMD 1206 91637 24 9 OHM A1R22 321 5029 00 671 2585 00 671 2585 00 RES FXD THK FILM 8 25K 80009 321 5029 00 0HM 1 0 125W TC 100 PPM 1206 T amp R A1R22 321 5031 00 671 2585 01 RES FXD THK FILM 12 1K 80009 321 5031 00 0HM 1 0 125W TC 100 PPM 1206 T amp R A1R 22 321 5029 00 671 2896 00 671 2896 00 RES FXD THK FILM 8 25K 80009 321 5029 00 0HM
35. 2N7002 TO 236 SOT 23 8MM TER A103 151 5066 00 XSTRSIG MOS N CH 60V 0 115A 7 5 80009 151 5066 00 OHM 2N7002 TO 236 SOT 23 8MM TER A1Q4 151 5066 00 XSTRSIG MOS N CH 60V 0 115A 7 5 80009 151 5066 00 OHM 2N7002 T0 236 SOT 23 8MM T amp R 5 6 TSG 90 PATHFINDER Service Manual Replaceable Electrical Parts Component Tektronix Serial Assembly Number Mfr Mfr Part Number Part Number gt Effective Discontinued amp Description Code Number A1Q5 151 5066 00 XSTR SIG MOS N CH 60V 0 115A 7 5 80009 151 5066 00 OHM 2N7002 T0 236 SOT 23 8MM T amp R A1Q6 151 5044 00 XSTR PWR BIPOLAR PNP 100V 3 0A 3 0MHZ 04713 MJ D32RL AMPL MJ D32C TO 252 DPAK 16MM T amp R AIR1 311 5036 00 RES VAR TRMR CERMET 5K 80009 311 5036 00 OHM 25 0 25W 4MM SQ TOP ADJ SMD T amp R A1R2 307 5041 00 RES NTWK FXD FI 4 7K OHM 2 0 125W 32997 4816P 002 472 A1R6 321 5113 00 RES FXD THK FILM 75 OHM 1 0 125W TC 100 80009 321 5113 00 PPM 1206 T amp R A1R7 311 5036 00 RES VAR TRMR CERMET 5K 80009 311 5036 00 OHM 25 0 25W 4MM SQ TOP ADJ SMD T amp R A1R8 321 5029 00 RES FXD THK FILM 8 25K 80009 321 5029 00 0HM 1 0 125W TC 100 PPM 1206 T amp R A1R9 321 5007 00 RES FXD THK FILM 121 196 0 125 2100 80009 321 5007 00 PPM 1206 T amp R A1R10 321 5015 00 RES FXD THK FILM 562 196 0 125 100 80009 321 5015 00 PPM 1206 T amp R A1R11 321 5022 00 RES FXD THK FILM 2 21K 80009 321 50
36. 32 A1U8 156 6591 00 IC DGTL CMOS PLD 80009 156 6591 00 A1U11 156 6560 00 IC LIN BIPOLAR OP AMP CUR FDBK 100MHZ H 80009 156 6560 00 OUT CUR OPA603AU S 016 300 A1U12 156 6518 00 IC MISC CMOS WAVEFORM GENERATOR DIG 80009 156 6518 00 PRO A1U13 156 6519 00 IC LIN BIPOLAR OP AMP DUAL 04713 MC33102D A1U14 156 6561 00 BIPOLAR D A 10 BIT 60MHZ CURRENT 80009 156 6561 00 OUT A1U15 156 6560 00 IC LIN BIPOLAR OP AMP CUR FDBK 100MHZ H 80009 156 6560 00 OUT CUR OPA603AU S 016 300 A1U16 156 6562 00 9 10358 80009 156 6562 00 A1U17 156 6519 00 IC LIN BIPOLAR OP AMP DUAL 04713 MC33102D A1U18 156 6520 00 IC LIN CMOS SW REGULATOR PWM CURRENT 1ES66 MAX738CWE MODE A1U20 156 5588 00 IC LIN BIPOLAR V REF 2 5V 80009 156 5588 00 1 MC1403 508 150 TUBE A1U21 156 5155 00 IC DGTL HCMOS GATE HEX 80009 156 5155 00 INV 74HC04 5014 150 TUBE TSG 90 PATHFINDER Service Manual 5 9 Replaceable Electrical Parts Component Tektronix Serial Assembly Number Mfr Mfr Part Number Part Number gt Effective Discontinued amp Description Code Number A1U22 156 5076 00 IC DGTL CMOS FLIP FLOP DUAL D 80009 156 5076 00 TYPE 4013B S 014 150 TUBE 1 1 119 4503 00 05 14 31818 7 80009 119 4503 00 2 671 2586 00 010100 021651 CIRCUIT BD ASSY KEYBOARD 80009 671 2586 00 A2 671 2586 01 B021652 CIRCUIT BD ASSY KEYBOARD 80009 671 2586 01 2 1 131 0787 00 671 2586 00 671 2586 00 TERM PIN 22526 47359 001 2 1 131
37. 40 S MB 80009 152 5027 00 LEAD 12MM TR A1CR15 152 0141 02 671 2585 00 671 2585 01 DIO SIG ULTRA 80009 152 0141 02 FAST 40V 150MA 4NS 2P F 1N4152 DO 35 T GR A1CR15 152 0141 02 671 2896 00 671 2896 01 DIO SIG ULTRA 80009 152 0141 02 FAST 40V 150MA 4NS 2PF 1N4152 D0 35 T amp R A1F1 159 0245 00 671 2585 00 671 2585 02 FUSE WIRE LEAD 1A 125V FAST 15915 R251001T1 A1F1 159 0153 00 671 2585 03 FUSE WIRE LEAD 1 5A 125V FAST BLOW 71400 A1 1 2 A1F1 159 0245 00 671 2896 00 671 2896 02 FUSE WIRE LEAD 1A 125V FAST 15915 R251001T1 A1F1 159 0153 00 671 2896 03 FUSE WIRE LEAD 1 5A 125V FAST BLOW 71400 A1 1 2 131 5542 00 CONN BOX 80009 131 5542 00 131 5542 01 CONN BOX 80009 131 5542 01 MOUNTING PARTS 210 0586 00 NUT PL ASSY WA 4 40 X 0 25 STL CD PL 78189 211 041800 00 QUANTITY 2 211 0101 00 SCR MACH 4 40 X 0 25 FLH 100 DEG STL 93907 ORDER BY DESCR QUANTITY 2 END MOUNTING PARTS A1J2 131 5543 00 CONN BOX 80009 131 5543 00 Alj2 131 5543 01 CONN BOX 80009 131 5543 01 MOUNTING PARTS 210 0586 00 NUT PLASSY WA 4 40 X 0 25 5TL CD PL 78189 211 041800 00 QUANTITY 2 211 0101 00 SCR MACH 4 40 X 0 25 FLH 100 DEG STL 93907 ORDER BY DESCR QUANTITY 2 END MOUNTING PARTS A1J 6 131 4794 00 PCB MALE STR 1X2 0 1CTR 0 235 MLG X 0 112 58050 082 3644 5510 TAIL 30GOLD 0 035 DIA 7 131 4794 00 PCB MALE STR 1X 2 0 1 0 235 MLG X 0 112 58050 082 3644 5510 TAIL 30GOLD 0 035 DIA A1j8 131 291
38. 5781 00 671 2586 01 CONN HDR PCB MALE STR 2 X 10 0 1 CTR 0 380 80009 131 5781 00 MLG X 0 09 TAIL GLD A2 2 QUANTITY 20 A3 119 4506 00 DISP LAY MODULE 80009 119 4506 00 1 174 3002 00 CABLE ASSY WITH XLR 131 3207 00 80009 174 3002 00 W2 174 3002 00 CABLE ASSY WITH XLR 131 3207 00 80009 174 3002 00 5 10 TSG 90 PATHFINDER Service Manual a ea Diagrams Circuit Board Illustrations Section 6 Diagrams Circuit Board Illustrations Symbols Component Values TSG 90 Graphic symbols and class designation letters are based on ANSI Standard Y32 2 1975 Logic symbology is based on ANSI Y32 14 1973 in terms of positive logic Logic symbols depict the logic function performed and may differ from the manufacturer s data Overline parenthesis or leading slash indicate a low asserting state Example ID CONTROL ID CONTROL or CONTROL Abbreviations are based on ANSI 1 1 1972 Other ANSI standards that are used in the preparation of diagrams by Tektronix Inc are Y14 15 1966 Drafting Practices Y14 2 1973 Line Conventions and Lettering Y10 5 1968 Letter Symbols for Quantities Used in Electrical Science and Electrical Engineering American National Standard Institute 1430 Broadway New York New York 10018 Electrical components shown on the diagrams are in the following units unless noted otherwise Capacitors Values one or greater are in picofarads pF Values less than one
39. 71 2585 00 RES FXD THK FILM 15 0K 80009 321 5032 00 0HM 1 0 125W TC 100 PPM 1206 T amp R A1R39 321 5033 00 671 2585 01 RES FXD THK FILM 18 2K 80009 321 5033 00 0HM 1 0 125W TC 100 PPM 1206 T amp R A1R39 321 5032 00 671 2896 00 671 2896 00 RES FXD THK FILM 15 0K 80009 321 5032 00 0HM 1 0 125W TC 100 PPM 1206 T amp R A1R39 321 5033 00 671 2896 01 RES FXD THK FILM 18 2K 80009 321 5033 00 0HM 1 0 125W TC 100 PPM 1206 T amp R A1R40 321 5030 00 RES FXD THK FILM 10 0K 80009 321 5030 00 0HM 1 0 125W TC 100 PPM 1206 T amp R 1 41 321 5315 00 RES FXD FILM 24 9 OHM 196 0 125W SMD 1206 91637 24 9 OHM A1R42 321 5030 00 RES FXD THK FILM 10 0K 80009 321 5030 00 0HM 1 0 125W TC 100 PPM 1206 T amp R A1R43 321 5315 00 RES FXD FILM 24 9 OHM 196 0 125W SMD 1206 91637 24 9 OHM A1R44 321 5169 00 RES FXD THK FILM 475K OHM 1 0 125W TC 100 91637 CRCW1206 47502FT PPM 1206 T amp R A1R45 321 5030 00 RES FXD THK FILM 10 0K 80009 321 5030 00 0HM 1 0 125W TC 100 PPM 1206 T amp R A1R50 321 5000 00 671 2585 00 671 2585 00 RES FXD THK FILM 10 OHM 1 0 125W TC 2100 51668 MCR18EZHFW10E PPM 1206 T amp R A1R50 321 5010 00 671 2585 01 RES FXD THK FILM 221 OHM 196 0 125W TC 100 80009 321 5010 00 PPM 1206 T amp R A1R50 321 5000 00 671 2896 00 671 2896 00 RES FXD THK FILM 10 OHM 1 0 125W TC 2100 51668 MCR18EZHFW10E PPM 1206 T amp R A1R50 321 5010 00 671 2896 01 RES FXD THK FILM 221 OHM 196 0 125W TC 2100 80009 321 5010 00 PPM 1206 T amp R A1R51 321 5030
40. 77 16 IFAT 24 17 PCS TI INT2 A2 1 0 1 02 10 ou W 24 E Da 78 17 LFATO 27 1 PC4 T0 AUDSCK U12 6 0 103 11 DU d 1 25 5 Do 82 18 3 26 VDD AUDSID U12 7 A4 1 O 1 04 A12 Nc 126 26 2 LFAt 84 19 LFD6 30 12 co os pogicoo 18 AUDLAT U12 8 LEAI 84 5 0 vos 19 06 Y A18 O 1uF 3544 vss PC7 CO1 AUDON 012 3 6 l O 106 A14 5 5 21 LFD4 FAIS 2 4 0 1 07 15 5 9 23 2 A8 110 vos 38 A m El yoo 22 CE vec o sv 10 10 voto end LE gt isst oun U21A U21D y A11 10 von 26 74HC04 74HC04 3 2 0 012 27 A13 1 O 1013 c32 H enD 1 Del s Del uPCLK 83 14 10 1 014 K AUDGIK gt NC TP2 i 15 10 015 55 Te x los P U12 16 U21E SK 72 Do DIN 1 0 vom 37 EU 74HC04 01 10 1018 eTa pers 918 Le 83 1 10 JuPCLK SATT 65 40 5 D3 1 0 020 SATZ 62 4i IDVSYNC D4 1 0 021 SAT 60 44 IDDATA D5 l O 1022 SD7 58 45 IDBLK U21C 850 58 D6 1 0 1023 45 74HC04 07 10 1024 Voz 47 SD3 Del 12 _ TCLKN I O vos 48 m U6 34 027 50 SD5 XC1736 36 0 0 11028 51 SDT U21B i 54 100 0 09 57 E 74HC04 DATA INIT O voso 52 5 3 4 2 53 031 63 3 De DACCIK gt 53 1032 53 4 XTL1 BCKIN 1 0 1033 68 q us 1034 79 D3 U21F 7 65 4 050 10 1035 mE 74HC04 4 oEiRsT ver o 6v CS1
41. 9 01 PCB MALE STR 1X 4 0 1CTR 0 235 MLG X 0 112 58050 082 3644 5510 TAIL 30 GOLD 0 035 DIA 9 131 2919 01 PCB MALE STR 1X 4 0 1CTR 0 235 MLG X 0112 58050 082 3644 5510 TAIL 30 GOLD 0 035 DIA A1 10 131 5240 00 PCB MALE STR 1X 5 0 1 CTR 0 230 MLG X 0 120 58050 082 3644 5610 TAIL 30 GOLD QUANTITY 5 PINS USED 114 0494 00 COIL IDCTR TRNTBL 2 2 3 2UH 80009 114 0494 00 5 114 0494 00 COIL IDCTR TRNTBL 2 2 3 2UH 80009 114 0494 00 AIL6 114 0494 00 COIL IDCTR TRNTBL 2 2 3 2UH 80009 114 0494 00 A1L7 120 1941 00 2 92079 80009 120 1941 00 A1L8 114 0495 00 COIL IDCTR TRNTBL 0 66 098UH 80009 114 0495 00 19 120 1938 00 XFMR Z 91389E 80009 120 1938 00 A1L10 108 5018 00 671 2585 00 671 2585 00 COILRF DCTR FXD 4 7UH 20 0 50 SRF 45MH 80009 108 5018 00 Z DCR 1 0 OHM IMAX 315MA 1812 PKG 12MM A1L10 108 5015 00 671 2585 01 COIL RF IDCTR FXD 100UH 10 Q 40 SRF 8 0MH 80000 108 5015 00 Z DCR 8 OHM IMAX 110MA 1812 PKG 12MM T amp R A1L10 108 5018 00 671 2896 00 671 2896 00 COILRF DCTR FXD 4 7UH 20 0 50 SRF 45MH 80009 108 5018 00 Z DCR 1 0 OHM IMAX 315MA 1812 PKG 12MM A1L10 108 5015 00 671 2896 01 COIL RF IDCTR FXD 100UH 10 Q 40 SRF 8 0MH 80009 108 5015 00 Z DCR 8 OHM IMAX 110MA 1812 PKG 12MM T amp R Al 120 1939 00 2 92266 80009 120 1939 00 101 151 5066 00 XSTR SIG MOS N CH 60V 0 115A 7 5 80009 151 5066 00 OHM 2N7002 TO 236 SOT 23 8MM TER A102 151 5066 00 SIG MOS N CH 60V 0 115A 7 5 80009 151 5066 00 OHM
42. ATHFINDER Tone Amplitude to 4 dBu use the 4 and pp keys CHECK that the Channel 2 THD is lt 1 Change the TONE LEVEL to 8 dBu CHECK that the Channel 2 THD is lt 1 Move the audio cable from the PATHFINDER Audio CH 2 connector to the Audio CH 1 connector CHECK that the Channel 1 THD is lt 1 Change the TONE LEVEL to 4 dBu CHECK that the Channel 1 THD is X146 Finally change the TONE LEVEL to 0 dBu CHECK that the Channel 1 THD is X146 16 Check Audio Output Amplitude a TSG 90 PATHFINDER Service Manual Set the PATHFINDER Frequency to 1 kHz and the Audio Level to 0 dBu with these steps as necessary m Open Tone Menu by pressing SHIFT TONE ON OFF press the two keys simultaneously m Use the and pp keys to set TONE FREQ to 1 kHz m Move to the TONE LEVEL selection with the y key Use the and pp keys to set the TONE LEVEL to 0 dBu 3 7 Performance Verification and Adjustment Procedures 3 8 CHECK that the Audio Output is 0 dBu 0 25 dBu Set the PATHFINDER Audio Level to 4 dBu use the lt and keys CHECK that the Audio Output is 4 dBu 0 25 dBu Set the PATHFINDER Audio Level to 8 dBu Go back up to the TONE FREQ menu item press the A key and select the appropriate frequencies in turn to CHECK that the Audio Output is 8 dBu 0 25 dBu at each of the following frequencies
43. Bi C54 2 F4 17 2 Di R23 2 G3 A2 R58 2 C5 C Ut5 2 Ci Fa C12 2 E3 B2 C55 2 C5 C2 L8 2 02 R24 2 G3 2 663 2 U16 2 Di C14 2 D1 C56 2 C5 C2 L9 2 F5 D2 R25 1 Gi Bi U17A 2 F3 B2 C15 2 F3 B2 C57 2 B5 C1 L10 2 D3 Bi R26 1 H2 B4 1 C16 2 F3 B2 C58 2 ES B2 Lt 2 B5 C1 R28 1 A2 Gi TP2 1 A4 U17B 2 G4 B2 C17 2 D3 D1 C59 2 A3 R29 1 A2 1 2 Ci E4 Ut8 2 E5 C2 C18 2 01 Q1 1 H2 B4 R30 1 A2 El 2 Ci E4 1020 2 A2 B3 C29 1 C3 F2 CRI 2 F5 c2 02 1 B2 El R32 2 Bi F4 TP5 2 F1 U21A 1 B4 F3 C30 1 G2 Fi cR 2 F5 2 2 F3 B2 R33 2 Bi F4 TP6 2 F1 C4 U21B 1 B4 C31 1 H5 2 B5 C1 04 2 F4 Bi R34 2 Ci E4 TP7 2 D3 Di U21C 1 B4 C32 1 A4 CR7 2 E5 Q5 2 C5 02 R35 2 Bi TP8 2 D3 Di U21D 1 B4 C33 1 G2 CR4 2 C2 Q6 2 B5 R36 2 F3 B2 TP9 2 G4 U21E 1 B4 CR15 2 Di R37 2 F3 Bl TP10 2 G4 B2 UetF 1 B4 C34 2 D2 ES R1 1 Gi Bi R38 2 ES Bl 2 G5 B2 U22A 2 05 D2 C35 2 Di D3 F1 2 B5 CI R2 1 Bi G3 R39 2 F3 Al TP12 2 G5 B2 U22B 2 D4 D2 C36 2 El 03 R6 2 Ci Ed C37 2 El J 1 A1 R7 2 G2 B3 R40 2 G4 Al Ut 1 F1 Yi 1 A3 C38 2 El Ca J2 1 At 02 R8 2 G2 B3 R41 2 Bl 12 1 C2 F2 C39 2 El Ca J5 2 R9 2 G2 A4 R42 2 G4 2 U4 1 Gl C40 2 El Ca J6 1 H2 4 R10 2 G2 R43 2 B2
44. Bu tone level See the adjustment proce dure in Section 3 This selection is used to calibrate the PATHFIND ER 8 dBu tone level See the adjustment proce dure in Section 3 TSG 90 PATHFINDER Service Manual Maintenance Corrective Maintenance Corrective maintenance deals with obtaining replacement parts torque specifica tions and component replacement Obtaining Replacement Replacement parts are available from or through the local Tektronix Inc field Parts office or representative When ordering parts be sure to include the following information in your order 1 Instrument type and option numbers if any 2 Instrument serial number 3 Description of the part as it appears in the electrical or mechanical parts list 4 The Tektronix part number If a part that has been ordered is replaced with a new or improved part the local Tektronix field office or representative will contact you concerning any change in the part number After repair the circuits may need readjustment Torque Specifications Only 4 screws are used in the PATHFINDER to secure the case halves together DO NOT USE MORE THAN 3 INCH POUNDS OF TORQUE ON THESE SCREWS Replacing Assemblies li WARNING Disconnect the AC adapter and batteries before replacing any components Back Cover Follow this procedure to remove and replace the back cover of the PATHFIND Removal and Replacement 1 Remove the four screws securing the back
45. CR18EZHFW 12E1 PPM 1206 T amp R A1R63 321 5030 00 671 2585 04 RES FXD THK FILM 10 0K 80009 321 5030 00 0HM 1 0 125W TC 100 PPM 1206 T amp R A1R63 321 5030 00 671 2896 04 RES FXD THK FILM 10 0K 80009 321 5030 00 0HM 1 0 125W TC 100 PPM 1206 T amp R A1U1 156 6491 00 80009 156 6491 00 A1U2 160 9402 00 671 2585 00 671 2585 01 IC DGTL PRGM 80009 160 9402 00 A1U2 160 9402 01 671 2585 02 IC DGTL CMOS MICROCMPTR 8 BIT 2 80009 160 9402 01 T USART A D 16K OTP 1 25MHZ 78CP 14 PLCC68 A1U2 160 9402 00 671 2896 00 671 2896 01 IC DGTL PRGM 80009 160 9402 00 A1U2 160 9402 01 671 2896 02 671 2896 03 IC DGTL CMOS MICROCMPTR 8 BIT 2 80009 160 9402 01 T USART A D 16K OTP 1 25MHZ 78CP 14 PLCC68 A1U2 160 9781 00 671 2896 04 IC DGTL CMOS MICROCMPTR 8 BIT 2 80009 160 9781 00 T USART A D 16K OTP 1 25 MHZ 78CP 14 PLCC68 A1U4 156 6272 01 IC MEM CMOS EEPROM 256 X 60395 24 0258 T amp R 8 5ER 24C02 508 15 T amp R A1U5 160 9403 00 671 2585 00 IC DGTL PRGM 80009 160 9403 00 A1U5 160 9572 00 671 2896 00 671 2896 03 IC MEM 27HC642 35DC 80009 160 9572 00 A1U5 160 9572 01 671 2896 04 IC MEM CMOS EPROM 8K X 8 35NS DIP 24 3 80009 160 9572 01 A1U6 160 9405 00 IC DGTL PRGM 80009 160 9405 00 A1U7 160 9404 00 671 2585 00 IC DGTL PRGM 80009 160 9404 00 A1U7 160 9571 00 671 2896 00 671 2896 03 IC MEM CMOS EPROM 64K X 80009 160 9571 00 8 150N5 27C512 PLCC32 A1U7 160 9571 01 671 2896 04 IC MEM CMOS EPROM 64K X 80009 160 9571 01 8 150N5 27C512 PLCC
46. ECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAM AGES IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR HAS ADVANCE NO TICE OF THE POSSIBILITY OF SUCH DAMAGES TSG 90 PATHFINDER Service Manual TSG 90 PATHFINDER Service Manual Se UU Contents Warranty Seg d ir dite 1 Dist of Figures iii cia een Od whence ae iv Eist of Tables 24 Paes EO a lle haga RARO STER iv Safety Summary rove ve ty eder POETA UU RATS vi Specifications 1 1 Introductions yy ae rex RRA G S hie 1 1 Reference Documentation 1 1 Performance Conditions 1 2 Safety Standards vete eee exa WAR tes 1 2 Specification Tables 1 3 Waveform Illustrations 1 9 Operating Information 2 1 Controls Indicators and Connectors 2 2 v arta ese vete A Sta 2 2 SHE Shift LOCK eoe eet ehe EO US 2 2 ium weeds es the tes ed es d za 2 3 Bars and Other Signals 2 3 ID On Off and ID Menu 2 3 ID Edit and ID Position 2 3 Tone On Off and Tone Menu 2 4 Recall and 2 5 2 2 2 4 Indicaters EEE EAS CARRE AS Vote PES eS 2 5 CONRECLOTS m ML 2 5
47. LY NORTH AMERICAN UL CSA 80009 119 4538 00 STANDARD ONLY 119 4539 00 1 POWER SUPPLY APANESE T MAEK 80009 119 4539 00 OPTION 1 ONLY OPTIONAL ACCESSORIES 17 119 4488 00 1 BAT PACK ASSY 80009 119 4488 00 070 8706 01 1 MANUAL TECH SERVICE TSG90 80009 070 8706 01 7 4 TSG 90 PATHFINDER Service Manual FIG 1 EXPLODED VIEW 7 5 TSG 90 PATHFINDER Service Manual 7 6 TSG 90 PATHFINDER Service Manual
48. OUT button down while turning the PATHFINDER ON Diagnostic Menu BATTERY TYPE FACTORY RESET LCD DIAG TONE LVLO TONE LVL4 TONE LVL8 4 4 AUTO POWER DOWN Use the keys to enable disable the Auto Power Down function When enabled the PATH FINDER will power down after 10 minutes of inac tivity no keystrokes Enabled status is indicated by a rotating line in the upper right corner of the LCD display Use the lt q and keys to select between RE CHARGEABLE and DISPOSABLE battery types This selection sets the voltage at which the BAT TERY LOW message appears and the lowest volt age on which the instrument will operate Be sure to set this selection to RECHARGEABLE when using NiCad batteries and DISPOSABLE when alkaline batteries are installed Pressing the ENTER button when this selection is displayed will reset the PATHFINDER to the facto ry default settings This includes stored text and user presets CAUTION ALL USER MADE SELECTIONS AND PRESETS WILL BE LOST This selection is used to check the proper operation of the LCD display Pressing the 4 button will turn all the LCD segments on and pressing the button will turn all the segments off This selection is used to calibrate the PATHFIND ER 0 dBu tone level The setting requires adjusting an internal potentiometer See the adjustment proce dure in Section 3 for instructions This selection is used to calibrate the PATHFIND ER 4 d
49. ST R53 Tone Level for 0 dBu 0 05 dBu Press the W key once to select TONE LVLA in the diagnostic menu Use and keys to ADJUST the audio level to 4 00 0 05 dBu Go to TONE 8 in the diagnostic menu press the W key once Use po keys to ADJUST the audio level to 8 00 0 05 dBu Reset the Audio Tone Frequency and Click to their previous states through the Tone Menu 3 Adjust Test Signal Gain a Connect the PATHFINDER Video Output to the 1780 A Input and terminate the loop through in 750 Set the 1780 for waveform display of Ch A Select the 5 Step signal from the PATHFINDER press G Select the WFM CAL function of the 1780 and set CAL to 714 mV ADJUST GAIN R52 so that the top of the lower waveform just touches the DC level of the upper waveform 4 Adjust Test Signal DC Offset a d Set the 1780 Coupling to GND and adjust the monitor trace to a convenient ground reference Change the 1780 input coupling to DC ADJUST DC OFFSET R7 to set the 0 IRE point of the 5 Step signal to the established ground reference 2 mV Repeat steps 3 and 4 as necessary for best results 5 Adjust Frequency Response 2T Ringing and SIN X X Compensation NOTE Step 5 contains several interactive adjustments Repeat this step until the best overall response is obtained TSG 90 PATHFINDER Service Manual Performance Verification and Adjustment Procedures Select the M
50. Service Manual Tektronix TSG 90 PATHFINDERTM NTSC Signal Generator 070 8706 01 Warning The servicing instructions are for use by qualified personnel only To avoid personal injury do not perform any servicing unless you are qualified to do so Refer to all safety summaries prior to performing service Copyright O Tektronix Inc rights reserved Tektronix products are covered by U S and foreign patents issued and pending Information in this publication supercedes that in all previously published material Specifications and price change privileges reserved Tektronix Inc Box 500 Beaverton Oregon 97077 TEKTRONIX and TEK are registered trademarks of Tektronix Inc WARRANTY Tektronix warrants that this product will be free from defects in materials and workmanship for a period of one 1 year from the date of shipment If any such product proves defective during this warranty period Tektronix at its option either will repair the defective product without charge for parts and labor or will provide a replacement in exchange for the defective product In order to obtain service under this warranty Customer must notify Tektronix of the defect before the expi ration of the warranty period and make suitable arrangements for the performance of service Customer shall be responsible for packaging and shipping the defective product to the service center designated by Tektronix with shipping charges prepaid Te
51. a 50 Hz 20 kHz audio sweep This sweep signal is composed of 27 separate frequencies more than double the number of specified fixed frequen cies While in the tone frequency menu with sweep selected displayed on the LCD readout pressing the ENTER key will stop the sweep and the PATHFIND ER will continue to output the frequency it was producing when the ENTER key was pressed The display will change from SWEEP 50 20 to SWEEP PAUSED This is useful for checking a problem noticed at a particular frequency while sweeping and also allows the use of frequencies not specifically addressed in the Tone Menu Pressing the ENTER key again will restart the sweep Recall and Store The Recall button allows the user to recall one of eight user defined IDs or four user presets In this mode the left right arrows select the ID or preset number and pressing ENTER will then recall it The up and down arrow buttons may be used to view the 2nd line of the text message before recalling Store is used to store the current ID text with an assigned ID number or it will store the current text and instrument settings as a User Preset Rev Apr 1994 TSG 90 PATHFINDER Service Manual Operating Information Indicators functions of the PATHFINDER are indicated by the LCD display This back lit display has two 16 character lines to display all information necessary for operation signal selection text editing selecting and positioning text messages an
52. amp Description Assembly and or Component Mounting parts for Assembly and or Component MOUNTING PARTS END MOUNTING PARTS Detail Part of Assembly and or Component Mounting parts for Detail Part MOUNTING PARTS END MOUNTING PARTS Parts of Detail Part Mounting parts for Parts of Detail Part MOUNTING PARTS END MOUNTING PARTS Mounting Parts always appear in the same indentation as the Item it mounts while the detail parts are indented to the right Indented items are part of and included with the next higher indentation Mounting parts must be purchased separately unless otherwise specified Indicates the code number of the actual manufacturer of the part Code to name and address cross reference can be found immediately after this page Indicates actual manufacturer s part number TSG 90 PATHFINDER Service Manual Replaceable Mechanical Part CROSS INDEX CODE NUMBER TO MANUFACTURER Mfr Code Manufacturer Address City State Zip Code 06090 RAYCHEM CORP 300 CONSTITUTION DRIVE MENLO PARK CA 94025 1111 12327 FREEWAY CORP 9301 ALLEN DR CLEVELAND OH 44125 4632 73143 FISCHER SPECIAL MFG CO 111 INDUSTRIAL RD COLD SPRING KY 41076 9749 80009 TEKTRONIX INC 14150 SW KARL BRAUN DR BEAVERTON OR 97077 0001 PO BOX 500 93907 TEXTRON INC 600 18TH AVE ROCKFORD IL 61108 5181 CAMCAR DIV TSG 90 PATHFINDER Service Manual 7 3 Replaceable Mechanical Parts Fig amp Index Tektronix Serial Number M
53. and p gt keys 3 Adjust Test Signal Gain 5 step signal set 1780 for WFM CAL 714 mV Adjust Gain R52 so waveforms just touch 4 Adjust Test Signal DC Offset Adjust DC Offset R7 so O IRE point of 5 step is 0 V 2 0 mV 5 Adjust Frequency Response 2T Ringing and SINX X Compensation NOTE Interactive steps repeat until best overall response is obtained Adjust filters L4 L5 L6 L7 and L8 for flat equal amplitude multiburst packets Adjust L7 and L8 for symmetrical ringing overshoot lt 0 05 Adjust SINX X Compensation C6 for flat mod pulse base 6 Adjust LCD Contrast Adjust R1 so that unused LCDs are just barely turned off Rev Mar 1994 TSG 90 PATHFINDER Service Manual 3 9 Performance Verification and Adjustment Procedures Adjustment Procedures Remove the PATHFINDER back cover before proceeding see the instructions on page 4 5 Power the instrument with the AC adapter while making adjustments 1 Adjust Subcarrier Frequency a Connect the PATHFINDER Video Output to the NTSC Test Signal Generator genlock input with a 750 coaxial cable Terminate the genlock input in 750 if necessary Connect the NTSC Test Signal Generator subcarrier output to the Frequency Counter A input using a 75Q coaxial cable Connect a reference such as WWW V to the B input of the Frequency Counter Set the Frequency Counter
54. and then charge the battery pack until fully charged approximately 16 hours A new battery pack will take a few charge discharge cycles to reach full capacity Setting the Battery Type and the Auto Power Down functions in the diagnostic menu also have an impact on battery life The battery types are disposable Alka line or rechargeable NiCad Setting the battery type changes the voltage level that causes the battery low message to be displayed and also changes the cut off voltage for instrument operation The Auto Power Down function when enabled shuts the PATHFINDER off when there is no keypress for approximately 10 minutes to conserve battery life Auto Power Down is indicated when enabled by a rotating line in the upper right corner of the display Preventive Maintenance Cleaning A Under average conditions the PATHFINDER should have preventive mainte nance performed about every 2000 hours This is approximately one year of operation Preventive maintenance includes cleaning visual inspection a perfor mance verification and if necessary adjustment See Section 3 for performance verification and adjustment procedures Clean the instrument often enough to prevent dust and dirt from accumulating in or on it Dirt can provide high resistance electrical leakage paths between con ductors or components in a humid environment CAUTION The PATHFINDER case is made of molded plastic Do not allow water to get inside of an
55. apart at J1 The rubber board spacers should remain attached to the LCD display Replacement is the reverse of removal Follow this procedure to remove the PATHFINDER keypad 1 Once the Main board is out of the way lift the plastic spacer board out of the PATHFINDER This is held in place only by a friction fit Lift the Keypad board out of the PATHFINDER This too is held in place by a friction fit Peel the rubber keypad out of the front panel Follow this procedure to replace the PATHFINDER keypad 1 Place the Keypad board with the pins of the connector towards the work bench Place the rubber keypad on top of the Keypad board positioning it so that the ON button is in the corner closest the connector Adjust the rubber keypad so that the fingers on its back side fit through the corresponding holes in the Keypad board TSG 90 PATHFINDER Service Manual Maintenance 4 Holding the keypad and Keypad board with the buttons up slide the front case onto them aligning the rubber buttons with the holes for them in the front case as you do so The Keypad board is a friction fit in the front case half so you must apply some slight pressure to fully seat the assemblies into the case 5 Place the assembled front case and keypad face down on the workbench and press the plastic spacer board into place Align the cutout in the spacer board with the connector The plastic fingers will be facing up TSG 90 PATHFINDER Se
56. ations 114 3 Dessin mV Yellow 0 0 us 0 0 9 4 16 2 22 7 29 2 35 7 42 2 48 7 55 2 61 8 63 6 285 7 Figure 1 2 75 Color Bars 714 3 mV 103 5 515 1 201 7 0 0 111 6 285 7 us 0 0 9 8 61 7 63 6 Figure 1 3 Red Field 1 10 TSG 90 PATHFINDER Service Manual Specifications mV 642 9 542 9 171 4 71 4 0 0 285 7 0 0 9 8 19 9 29 9 35 9 41 9 52 0 63 6 15 61 9 Figure 1 4 SIN X X 714 3 mV 571 4 428 6 285 7 142 9 0 0 285 7 us 0 0 19 3 27 3 35 3 43 4 51 4 61 7 63 6 Figure 1 5 5 Step Staircase Gray Scale TSG 90 PATHFINDER Service Manual 1 11 Specificatio
57. carrier 2 51 us 0 1 us 9 cycles of subcarrier TSG 90 PATHFINDER Service Manual 1 3 Specifications Table 1 2 Video Test Signals Characteristic SMPTE Bars Rise Times Luminance Chrominance Q Field Timing Color Bars Reverse Blue Bars IYQB White Yellow Cyan Green Magenta Red Blue Q 75 Color Bars SNG Color Bars Opt J only SNB021565 amp above Lines 21 163 Lines 164 198 Lines 199 209 Lines 210 162 Red Field Luminance P edestal Chrominance Amplitude Chrominance Phase Performance Information See Figure 1 1 140 ns 25 ns 250 ns 25 ns 833 ns 80 ns Lines 21 182 See Figure 1 1a Lines 183 202 See Figure 1 1b Lines 203 262 See Figure 1 1c Luminance Amplitude Subcarrier Amplitude Subcarrier P hase Pedestal mV peak to peak mV degrees 549 1 00 0 00 0 492 6 443 3 1671 400 9 626 6 283 5 344 5 585 2 240 7 258 2 585 2 60 7 201 7 626 6 103 5 110 1 443 3 3471 53 6 285 7 303 0 53 6 285 7 33 0 Full Field Color Bars 75 Amplitude 7 5 Setup with a 100 IRE White Flag See Fig ure 1 2 30 IRE Flat Field Color Bars of 0 Setup SMPTE Color Bars IYQB of 0 Setup SMPTE Color Bars 30 IRE Flat Field See Figure 1 3 201 74 mV 28 3 IRE 626 66 mV p 87 8 IRE 103 59 SIN XyX See Figure 1 4 Spectrum 3 dB at4 75 MHz 5 Step Staircase See Figure 1 5 Amplitude 114 3 mV 100 0 IRE Flat Field STD only See Figure 1 6
58. d making menu selections Connectors The PATHFINDER has four connectors one 750 BNC connector for the video output two XLR connectors for audio output and one DC power jack for the AC Adapter input Rev Apr 1994 TSG 90 PATHFINDER Service Manual 2 5 Operating Information 2 6 TSG 90 PATHFINDER Service Manual Performance Verification and Adjustment Procedures w W h Performance Verification and Adjustment Procedures This section consists of a detailed performance verification procedure to verify the operation of the PATHFINDER and an adjustment procedure to return the PATHFINDER to in spec operation The order of these procedures has been chosen to minimize changes in equip ment setup Performance parameters may be checked in any order As some of the calibration steps are interactive care must be taken when adjusting individual parameters to ensure that all others remain within specification A performance verification checklist begins on page 3 2 Performance verification procedure instructions begin on page 3 4 An adjustment checklist appears on page 3 9 Adjustment instructions begin on page 3 10 Required Test Equipment The following list of equipment represents the minimum required for the Perfor mance Verification and Adjustment procedures While alternate equipment may be used it is not recommended Alternate equipment must meet the minimum specifications for the listed equipment Use of inadequate equip
59. e 642 9 mV 90 IRE TSG 90 PATHFINDER Service Manual Specifications Table 1 4 Audio Tone Characteristic Performance Requirements Supplemental Information Amplitude 0 44 or 48 dBu into 6000 Amplitude Accuracy 0 25 dBu Frequency 50 63 125 250 and 400 Hz 1 2 4 8 10 12 5 16 and 20 kHz Sweep Frequency Accuracy 0 5 Hz Sweep 1 kHz for 5 seconds followed by 0 5 seconds at each of the following frequencies 50 63 80 100 125 160 200 250 315 400 500 630 and 800 Hz then 1 1 25 1 6 2 2 5 3 15 4 5 6 3 8 10 12 4 16 and 20 kHz Distortion THD lt 1 20 kHz bandwidth lt 0 4 typical Audio ID click click ON Channel 1 1 click Channel click outputs are offset for positive channel identification Channel 2 2 clicks Table 1 5 Power Supply Table 1 6 Physical Characteristics Characteristic Performance Requirements Supplemental Information DC Input Range 9 to 15 Vdc Supply Accuracy 5 V 250 mV 5 V 250 mV Hum Typical 25 MV p p Noise lt 50 mV 5 MHz bandwidth Fuse 1 A fast blow 32 V min Power Limit without adapter 225W with adapter 40W Power Consumption Typical Audio and Back light off 1 25 W Audio and Back light on 144W Characteristic Performance Information Height 5 6 cm 2 2 in Width 9 1 cm 3 6 in Depth 19 1 cm 7 5 in Net Weight TSG 90 0 48 kg 1 06 Ib TSG 90 with battery pack 0 68 kg 1 5 lb 1 50 k
60. e Number to Manufacturer Cross Index for the electrical parts list Number to Manufacturer is located immediately after this page The cross index provides codes names and addresses of manufacturers of components listed in the electrical parts list Abbreviations Abbreviations confrorm to American National Standards Institute ANSI standard Y 1 1 List of Assemblies list of assemblies can be found at the beginning of the electrical parts list The assemblies are listed in numerical order When the complete component number of a part is known this list will identify the assembly in which the part is located TSG 90 PATHFINDER Service Manual 5 1 Replaceable Electrical Parts Column Descriptions Component No Column 1 Tektronix Part No Column 2 Serial Assembly No Column 3 and 4 Name and Description Column 5 Mfr Code Column 6 Mfr Part No Column 7 5 2 The component circuit number appears on the diagrams and circuit board illustrations located in the diagrams section Assembly numbers are also marked on each diagram and circuit board illustration in the Diagram section and on the mechanical exploded views in the mechanical parts list The component number is obtained by adding the assembly number prefix to the circuit number Example a Component Number A23R1234 A23 R1234 Assembly Number Circuit Number Read Resistor 1234 of Assembly 23 Example b Component Number A23A2R1234 A23 2
61. ectrotechnical Commission Standard Safety Requirements for Electronic Measuring Apparatus IEC 348 Canadian Standards Association Electrical Standard for Electrical and Electronic Measuring and Testing Equipment CAN CSA C22 2 No 231 Standard for Electrical and Electronic Measuring and Testing Equipment Second Edition July 21 1980 TSG 90 PATHFINDER Service Manual 1 1 Specifications Performance Conditions The Performance Requirements are valid within the environmental limits shown in Table 1 7 if the instrument is calibrated in an ambient temperature of 23 C after a warm up time of 20 minutes Safety Standards The following safety standards apply to the TSG 90 m ANSVISA S82 01 m 348 C222 No 231 m UL 1244 NOTE Shielded cables were used in the certification of this instrument therefore shielded cables are recommended to be used when operating EC 92 1 2 TSG 90 PATHFINDER Service Manual Specifications Specification Tables Table 1 1 General Video Test Signal Characteristics Characteristic Luminance Amplitude Accuracy Performance Requirements Supplemental Information 1 of 714 3 mV 100 1 IRE Chrominance to Luminance Gain 2 of 714 3 mV 100 2 IRE 1 typical Blanking Level Rise Time Accuracy Burst Amplitude Sync Amplitude 0 V 50 Except where otherwise specified 285 7 mV 40 IRE 2 285 7 mV 40 IRE 2 Sync
62. for a ratio of A B and set the AVG to 106 ONLY IF NECESSARY remove the round metal foil tape cover from the oscillator Y 1 ADJUST the subcarrier frequency to 3 579545 MHz 0 5 Hz NOTE The subcarrier frequency specification is 10 Hz but it is recommended that this adjustment be made as close to 3 579545 MHz as possible to maximize performance The crystal may drift after adjustment Leave the PATHFINDER powered up for 20 minutes after adjustment then recheck the frequency to verify that it has remained within spec g Reinstall the metal foil tape cover on the oscillator 2 Adjust Audio Output Amplitude a Connect the PATHFINDER Audio CH 2 to the AA501 Audio Distortion analyzer Attach a 6000 resistor to the analyzer s and terminals to represent the system load Set the PATHFINDER Tone Frequency and Click with these steps m Open the Tone Menu by pressing SHIFT TONE ON OFF press the two keys simultaneously m Use the and pp keys to set TONE FREQ to 1 kHz m Move to the CLICK ON OFF selection with the y key m Use lt and keys if necessary to turn the Click OFF TSG 90 PATHFINDER Service Manual Performance Verification and Adjustment Procedures Enter the diagnostic menu and go to TONE LVLO with these steps m Turn the PATHFINDER OFF and then ON while holding the LOCKOUT button down m Press the A key repeatedly to reach the TONE LVLO selection menu item 5 ADJU
63. fr No Part No Effective Dscont Qty 12345 Name amp Description Code Part No 1 1 614 0913 00 1 KIT ASSEMBLY BATTERY HOLDER SUB ASSEMBLY 80009 614 0913 00 MOUNTING PARTS 2 211 0097 00 4 SCREW MACHINE 4 40 X 0 312 P NH STL 93907 ORDER BY DESCR END MOUNTING PARTS 3 348 1347 00 4 PAD CUSHIONING TSG90 80009 348 1347 00 4 200 4075 00 1 DOOR BATTERY POLYCARBONATE 80009 200 4075 00 5 333 4065 00 1 PANEL REAR POLYCARBONATE 80009 333 4065 00 6 131 0955 03 1 CONN RF JACK 80009 131 0955 03 ATTACHED PARTS 7 210 0590 00 1 NUT PLAIN HEX 0 375 32 X 0 438 BRS CD PL 13743 28269 402 8 210 0255 00 1 TERMINAL LUG 0 391 ID LOCKING BRS CD PL 12327 ORDER BY DESCR 174 3001 00 1 CABLE ASSY WITH BNC 131 0955 03 80009 174 3001 00 162 0531 00 1 INSUL SLVG ELEC HT SHRINK 0 165 ID 06090 VERSAFIT END ATTACHED PARTS 9 1 CIRCUIT BD ASSY SEE Al REPL 10 426 2475 00 1 SPACER BOARD POLY CARBONATE 80009 426 2475 00 ell 0 1 CIRCUIT BD ASSY SEE A2 REPL 12 119 4487 00 022754 1 KEYPAD SILICONE RUBBER 80009 119 4487 00 12 119 4487 01 022755 1 KEYPAD SILICONE RUBBER 80009 119 4487 00 13 361 1636 00 2 SPACER SANTOPREN 80009 361 1636 00 14 1 DISP LAY MODULE SEE A3 REPL 15 614 0915 00 1 KIT ASSEMBLY 378 2073 00 202 0320 00 80009 614 0915 00 STANDARD ACCESSORIES 016 1229 00 1 CASE CARRYING TSG90 80009 016 1229 00 063 1449 00 1 MANUAL TECH OPERATOR TSG90 CARD 80009 063 1449 00 16 119 4538 00 1 POWER SUPP
64. g 3 31 lb Shipping Weight with AC adapter TSG 90 PATHFINDER Service Manual Specifications Table 1 7 Environmental Characteristics Characteristic Performance Information Temperature Operating 0 C to 50 32 to 4122 F Storage 30 C to 465 C 22 to 4149 excluding batteries Altitude Operating battery to 15 000 feet 4572 m Operating with AC adapter to 14 000 feet 4267 m Storage to 50 000 feet 15420 m Transportation Meets the requirements of NTSB Test Procedure 1A Category II 24 inch drop 1 8 TSG 90 PATHFINDER Service Manual Specifications Waveform Illustrations 714 3 mV 549 1 8 Color Bars EIA Color Bars 0 0 285 7 us 00 9 4 17 0 24 5 32 0 39 5 47 0 54 5 62 0 714 3 mV 549 1 b Reverse Blue Bars 53 6 0 0 285 7 us 00 9 4 17 0 24 5 32 0 39 5 47 0 54 5 62 0 63 6 714 3 mV c for SMPTE Bars 53 6 0 0 285 7 us 00 9 4 18 8 28 2 37 6 469 519 62 0 494 544 63 6 Figure 1 1 SMPTE Color Bar Components TSG 90 PATHFINDER Service Manual 1 9 Specific
65. gt AAA Replaceable Mechanical Parts This section contains a list of the components that are replaceable for the TSG 90 Use this list to identify and order replacement parts There is a separate Replaceable Mechanical Parts list for each instrument Parts Ordering Information Replacement parts are available from or through your local Tektronix Inc Field Office or representative Changes to Tektronix instruments are sometimes made to accommodate improved components as they become available and to give you the benifit of the latest circuit improvements Therefore when ordering parts it is important to include the following information in your order m Part number m Instrument type or model number m Instrument serial number m Instrument modification number if applicable If a part you have ordered has been replaced with a new or improved part your local Tektronix Inc Field Office or representative will contact you concerning any change in part number Change information if any is located at the rear of this manual Using the Replaceable Mechanical Parts List The tabular information in the Replaceable Mechanical Parts list is arranged for quick retrieval Understanding the structure and features of the list will help you find all of the information you need for ordering replaceable parts Cross Index Mfr Code The Mfg Code Number to Manufacturer Cross Index for the mechanical parts Number to Manufacturer list is located
66. he ID Menu allows the ID cycle to be turned on or off sets the display time for the captions and selects which of the stored ID messages to cycle in what order ID Edit and ID Position Pressing the ID Edit button enters a mode where the current ID text can be edited Editing occurs off line in an edit buffer so any displayed messages are not affected When finished editing pressing the Enter button saves the ID from the edit buffer as the current ID and the new text is inserted into the video signal unless the ID cycle function is in use The ID Position mode Shift ID Edit allows positioning of the message on screen The H and V readouts on the LCD display allow the operator to deter mine where the message is being positioned even if there is no video display available The H value shows how many letter spaces from the left edge the mes sage starts The V value shows the character line that the first line of text occu pies If the first line of text is placed into the vertical interval the LCD display will read V vert Tone On Off and Tone Menu The Tone On Off button toggles the audio tone on and off When Tone is On the LCD display will display the selected audio level i e Tone 4dB The Tone Menu Shift Tone On Off is used to select the tone frequency select the audio level 0 4 or 8 dBu and to turn the audio click on and off The tone frequency menu will select one of 13 fixed frequencies between 50 Hz and 20 kHz or
67. ifications 714 3 mV 571 4 457 1 342 9 228 6 114 3 0 0 285 7 0 0 9 8 13 7 16 7 22 7 28 8 35 9 63 6 19 7 25 7 31 8 39 2 61 8 Figure 1 14 FCC Composite Lines NTC7 Composite 50 IRE Flat Field Figure 1 15 Matrix 1 16 TSG 90 PATHFINDER Service Manual Specifications 714 3 mV 549 1 0 0 Lines 33 45 238 and 250 714 3 mV 549 1 1 0 0 4 i 149 56 5 Lines 69 132 and 149 213 714 3 mV 549 1 Lines 133 140 and 142 148 Figure 1 16 Safe Area TSG 90 PATHFINDER Service Manual 714 3 mV 549 1 714 3 0 0 285 7 us 0 0 remaining lines Safe Area display 63 6 TSG 90 PATHFINDER Service Manual ma Ss Operating Information Operating Information The TEKTRONIX TSG 90 PATHFINDER TV Signal Generator is designed for ease of operation and outstanding portability It provides a complement of 16 NTSC test signals including the Safe Area signal It also provides 13 selectable audio frequencies from 50 Hz to 20 kHz a 50 Hz to 20 kHz audio sweep and an audio click channel ID The two stereo AUDIO outputs may be set to one of three selectable amplitudes 0 dBu 4 dBu or 8 dBu Tektronix Pathfinder TSG 90 NTSC Signal Generator ID 5 5 8 A cop 2 3 o 9
68. in microfarads uF Resistors Ohms Q Diagrams Circuit Board Illustrations The following information and special symbols may appear in this manual Assembly Numbers Each assembly in the instrument is assigned an assembly number e g A20 The assembly number appears on the diagram in circuit board outline circuit board illustration title and lookup table for the schematic diagram The Replaceable Electrical Parts List is arranged by assembly number in numeri cal sequence the components are listed by component number Example Component Number Chassis mounted components have no Assembly No prefix A23 A2 R1234 See end of Replaceable Electrical Parts List Assembly Subassembly T Number Number if used Schematic Circuit Number Grid Coordinates The schematic diagram and circuit board component location illustration have grids A lookup table with the grid coordinates is provided for ease of locating the component Only the componeants illustrated on the facing diagram are listed in the lookup table When more than one schematic diagram is used to illustrate the circuitry on a circuit board the circuit board illustration will only appear opposite the first dia gram the lookup table will list the diagram number of other diagrams that the other circuitry appears on B DECOUPLED OR FILTERED VOLTAGE PLUG CHANGED XE PART WIRE STRAP REAR 12V3 PORTS ae NEGATIVE INPUT
69. ktronix shall pay for the return of the product to Customer if the shipment is to a location within the country in which the Tektronix service center is located Customer shall be responsible for paying all shipping charges duties taxes and any other charges for products re turned to any other locations This warranty shall not apply to any defect failure or damage caused by improper use or improper or inade quate maintenance and care Tektronix shall not be obligated to furnish service under this warranty a to repair damage resulting from attempts by personnel other than Tektronix representatives to install repair or service the product b to repair damage resulting from improperuse or connection to incompatible equip ment c to repair any damage or malfunction caused by the use of non Tektronix supplies or d to service a product that has been modified or integrated with other products when the effect of such modification or integration increases the time or difficulty of servicing the product THIS WARRANTY IS GIVEN BY TEKTRONIX WITH RESPECT TO THIS PRODUCT IN LIEU OF ANY OTHER WARRANTIES EXPRESSED OR IMPLIED TEKTRONIX AND ITS VEN DORS DISCLAIM ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE TEKTRONIX RESPONSIBILITY TO REPAIR REPLACE DE FECTIVE PRODUCTS IS THE SOLE AND EXCLUSIVE REMEDY PROVIDED TO THE CUS TOMER FOR BREACH OF THIS WARRANTY TEKTRONIX AND ITS VENDORS WILL NOT BE LIABLE FOR ANY INDIR
70. l components connectors and test points are identified on circuit board illustrations located on the inside fold of the corresponding circuit diagram or the back of a preceding diagram Numbering The circuit board assemblies are assigned assembly numbers starting with 1 Circuit boards have been assigned an assembly number so that they may be or dered from Tektronix Inc They are as follows 1 Main Board Assembly A2 Keypad Board Assembly A3 LCD Board Assembly The part numbers for ordering these boards are listed first in the Replaceable Electrical Parts list EPL in Section 5 The EPL is arranged in assembly by assembly order as designated in ANSI Standard Y32 16 1975 Each component is assigned a circuit number according to its location within a circuit which is shown in the parts list by combining the assembly number and the circuit number EXAMPLE R123 on assembly A2 would be listed in the EPL as A2R123 In the EPL assemblies are listed first followed by circuit board mounted parts in alphanumeric order Parts mounted on the chassis are listed at the end of the EPL NOTE The complete part number shown in the parts list should be used when ordering replacement parts TSG 90 PATHFINDER Service Manual 4 3 Maintenance Diagnostics The PATHFINDER contains no automated diagnostic routines There is one diagnostic selection found in the diagnostics menu LCD Diag This menu is ac cessed by holding the LOCK
71. m the PATHFINDER press G CHECK that the test signal DC level is at O V 50 mV 3 Check Sync Amplitude a Continue from the preceding step with the PATHFINDER 5 Step signal on the 1780 waveform Ch A Using the WFM CAL function of the 1780 match the DC level of the lower displayed waveform to the sync tip of the upper waveform CHECK that the sync amplitude is 285 7 mV 5 7 mV 40 IRE 0 8 IRE TSG 90 PATHFINDER Service Manual Performance Verification and Adjustment Procedures 4 Check Burst Amplitude a Using the 1780 WFM CAL function match the top of the burst on the lower displayed waveform to the bottom of the burst on the upper waveform b CHECK that the burst amplitude is 285 7 mV 45 7 mV 40 IRE 0 8 IRE 5 Check 5 Step Linearity a Continuing from the preceding step set the 1780 to view the signal using the differentiated step filter b CHECK that the difference between the highest and lowest spikes differentiated steps is 190 6 Check Luminance Amplitude Accuracy a Using the 1780 WFM CAL function match the top of the 5 Step waveform on the lower display to the DC level on the upper waveform b CHECK that the 5 Step amplitude is 714 mV 7 14 mV 100 IRE 1 IRE 7 Check Rise Time a Setthe 1780 to view the sync pulse b Setthe voltage cursors to the the 10 and 90 points of the sync transitions c CHECK that the rise and fall times between 1
72. ment may result in faulty measurements or calibration Table 3 1 Required Test Equipment Item Information Requirements Example NTSC Video Measurement For measuring and displaying Tektronix 1780 Video Mea Set line and field rate waveforms surement Set Mustbe capable of making differential phase and gain measurements Frequency Counter Must be accurate to within 2 5 Tektronix DC503A plugs into Hz out of 5 MHz a TM503 power mainframe NTSC Video Signal Generator Mustbe capable of being gen Tektronix TSG 170A locked to the PATHFINDER Video output and must have a Subcarrier output TSG 90 PATHFINDER Service Manual 3 1 Performance Verification and Adjustment Procedures Table 3 1 Cont Required Test Equipment Item Audio Distortion Analyzer Audio Connector to Triple Ba nana Cable Noise Measurement Filter BNC Coaxial Cables End Line Termination Information Requirements Mustbe capable of testing power output over a range of 0 to 8 dBm Must be capable of detecting THD of 0 01 or less Continuous random noise 5 MHz low pass filter 75 impedance Qty 2 150 0 02596 termination with BNC connector Example Tektronix AA501 ITT Pamona Electronics Mod el 4953 J 36 Must be config ured to match the PATHFIND ER audio output Pin 1 shield pin 2 and pin 3 Tektronix p n 015 0213 00 Tektronix p n 012 0074 00 Tektronix p n 011 0102 01 Performa
73. nce Verification Checklist 3 2 Oscillator Frequency Test Signals Use the following checklist if you are familiar with the operation of the TSG 90 as well as video and audio performance verification techniques Step by step instructions for all of the procedures begin on page 3 4 NOTE After initial delivery or long storage allow a two hour warm up time to re age the crystal Thereafter 20 minute warm up time is sufficient 1 Check Subcarrier Frequency 2 Check Blanking Level 0 V 50 mV 3 Check Sync Amplitude 285 7 mV 5 7 mV 40 IRE 20 8 IRE 4 Check Burst Amplitude 285 7 mV 5 7 mV 40 IRE 20 8 IRE Subcarrier of genlocked generator 3 579545 MHz 10 Hz TSG 90 PATHFINDER Service Manual Performance Verification and Adjustment Procedures 10 11 12 13 14 Audio Outputs 15 16 Check 5 Step Linearity Max diff step difference lt 1 Check Luminance Amplitude Accuracy 714 mV 7 14 mV 100 IRE 1 IRE Check Rise Time 140 ns 20 ns 10 to 90 Check SCH Phase SCH Phase 0 5 Check Chrominance to Luminance Delay and Gain Delay lt 15 ns Gain lt 2 Check K Factor 2T pulse K Factor lt 0 5 Check Differential Phase and Gain Diff phase X1 Diff gain X196 Check Line Tilt Line tilt 3 57 mV 0 5 IRE Check Field Tilt Field tilt lt 3 57 mV 0 5 IRE Check Multib
74. nd arrow buttons for maneuvering through the menus and positioning text on screen There is an enter button in the center of the arrow keys used in menu selections There is also a Shift Shift Lock button an ON button and a Lock Out button Other Ten 5 ignal m Shift Lock Shift Shift Lock The Shift Shift Lock button is used to access the upper shifted nomenclature associated with each of the buttons including itself When Shift is pressed a reverse video S is displayed in the lower right corner of the LCD display indicating that the next keystroke will use the shifted nomenclature If the next keystroke is the Shift button again then the keypad is locked into the shift mode and all keystrokes will use the shifted nomenclature The LCD display shows a reverse video SL indicating that shift lock is active Shift Lock is cancelled by pressing the Shift button a third time TSG 90 PATHFINDER Service Manual Operating Information Lockout The Lockout button is used to disable the keypad While locked out pressing any key except Lock Out or ON produces the message press Lock Out on the LCD display and has no other effect While in Lock Out mode a lock symbol padlock icon appears in the lower right corner of the LCD display Bars and Other Signals The Bars and Other Signals buttons are used along with the alphanumeric keys for selecting test signals This occurs in the
75. ns 714 3 mV 0 0 285 7 us 0 0 63 6 Figure 1 6 0 Flat Field 714 3 mV 357 2 0 0 285 7 us 0 0 9 6 61 8 63 6 Figure 1 7 50 IRE Flat Field 1 12 TSG 90 PATHFINDER Service Manual Specifications 714 3 mV 285 7 us 0 0 9 6 61 8 63 6 Figure 1 8 Black Burst 714 3 mV 0 0 285 7 us 0 0 9 6 61 8 63 6 Figure 1 9 Field Square Wave TSG 90 PATHFINDER Service Manual 1 13 Specifications mV s 53 4 60 4 63 6 54 5 61 9 46 4 47 5 39 4 40 5 32 4 33 5 25 4 26 5 19 5 139 181 9 4 0 0 us Figure 1 10 Multiburst 714 3 mV 8 Horizontal Component 0 0 285 7 61 9 9 5 0 0 us 63 6 714 3 mV 549 3 b Vertical Component 0 0 285 7 Figure 1 11 Convergence Components TSG 90 PATHFINDER Service Manual 1 14 Specifications 714 3 mV 642 9 514 8 885 7 2574 61 01 63 6 58 0 61 8 36 0 us 00 0 0 285 7 Figure 1 12 NTC7 Composite 714 3 3 0 3 58 4 2 2 0 N I I N I N I I 1 0 500 kHz mV 0 0 285 7 60 0 63 6 61 9 46 0 50 0 54 0 40 0 269 31 0 35 0 387 42 9 2 9 21 1 16 0 0 0 us Figure 1 13 NTC7 Combination 1 15 TSG 90 PATHFINDER Service Manual Spec
76. rvice Manual 4 7 4 8 TSG 90 PATHFINDER Service Manual popa p O Replaceable Electrical Parts EFF Replaceable Electrical Parts This section contains a list of the components that are replaceable for the TSG 90 Use this list to identify and order replacement parts There is a separate Replaceable Electrical Parts list for each instrument Parts Ordering Information Replacement parts are available from or through your local Tektronix Inc Field Office or representative Changes to Tektronix instruments are sometimes made to accommodate improved components as they become available and to give you the benifit of the latest circuit improvements Therefore when ordering parts it is important to include the following information in your order m Part number m Instrument type or model number m Instrument serial number m Instrument modification number if applicable If a part you have ordered has been replaced with a new or improved part your local Tektronix Inc Field Office or representative will contact you concerning any change in part number Change information if any is located at the rear of this manual Using the Replaceable Electrical Parts List The tabular information in the Replaceable Electrical Parts list is arranged for quick retrieval Understanding the structure and features of the list will help you find all of the information you need for ordering replaceable parts Cross Index Mfr Code The Mfg Cod
77. shows where applicable A cautionary or other information is to be found As marked on equipment DANGER High voltage Protective ground earth terminal A ATTENTION refer to manual TSG 90 PATHFINDER Service Manual Safety Summary Power Source This product is intended to operate from a power source that applies no more than 250 volts RMS between the supply conductors or between either supply conductor and ground Ground the product This product is grounded through the grounding conductor of the power module power cord To avoid electrical shock plug the power cord into a properly wired receptacle before connecting to the product input or output terminals A protec tive ground connection by way of the grounding conductor in the power cord is essential for safe operation Danger arising from loss of ground If the protective connection to ground is lost all accessible conductive parts in cluding knobs and controls that may appear to be insulated can render an elec tric shock Use the proper fuse Use only the fuse of correct type voltage rating and current rating as specified in the parts list for the product Refer fuse replacement to qualified personnel Do Not operate in an explosive atmosphere Do not operate this product in an explosive atmosphere unless it has been specif ically certified for such operation Do Not operate without covers To avoid injury do not operate the product witho
78. ultiburst signal from the PATHFINDER press C Set the 1780 to view all of the multiburst packets on a line ADJUST LA L5 L6 L7 and L8 to make the frequency packets flat and equal amplitude from one packet to another Use the 1780 CAL function to confirm that all packets are of equal amplitude 1 596 Select the NTC7 Composite signal from the PATHFINDER press D Set the 1780 to view the bottom of the modulated and 2T pulses Magnify as necessary to view the ringing ADJUST L7 and L8 for symmetrical ringing Use the 1780 K Factor graticule to verify that the ringing overshoot is lt 0 5 of peak ADJUST SIN X X Correction C6 to make the bottom of the Modulated Pulse as flat as possible Return to part a and repeat this step Continue to repeat this step until the best overall response is obtained 6 Adjust LCD Contrast Press the BARS button to make sure that the LCD backlight is on ADJUST LCD Contrast R1 counterclockwise until the unused LCD segment rectangles appear then adjust R1 clockwise until they just disappear Stop adjusting R1 before the intensity of the displayed LCD characters is affected TSG 90 PATHFINDER Service Manual Maintenance Maintenance Battery Hints For optimal battery life and capacity use the rechargeable NiCad battery pack Tektronix p n 119 4488 00 in full charge discharge cycles In other words ful ly discharge the battery pack before recharging
79. urst Frequency Response Flat Packets equal amplitude 2 Check Total Harmonic Distortion Channel 1 lt 1 Channel 2 lt 1 Check Audio Output Amplitude L OdBu 0 dBu 20 25 dBu at 1 kHz both channels 4 dBu 4 dBu 10 25 dBu at 1 kHz both channels 8 dBu 8 dBu 0 25 dBu at all possible frequencies both channels TSG 90 PATHFINDER Service Manual 3 3 Performance Verification and Adjustment Procedures Performance Verification Procedures 3 4 Oscillator Frequency Test Signals NOTE After initial delivery or long storage allow a two hour warm up time to re age the crystal Thereafter a 20 minute warm up time is sufficient 1 Check Subcarrier Frequency a Connect the PATHFINDER Video Output to the genlock input of the NTSC Test Signal Generator with 75Q coaxial cable Terminate the genlock input in 75Q if required Connect the NTSC Test Signal Generator subcarrier output to the Frequency Counter A input using a 75Q coaxial cable Connect a reference such as WWW V to the B input of the Frequency Counter Set the Frequency Counter for a ratio of A B and set the AVG to 106 CHECK that the measured oscillator frequency is 3 579545 MHz 10 Hz 2 Check Blanking Level a Connect the PATHFINDER Video output to the 1780 A Input and terminate the loop through in 750 View the Ch A signal on the 1780 waveform display Select the 5 Step signal fro
80. ut its covers and panels proper ly installed Do Not service alone Do not service or adjust this product unless another person capable of rendering first aid and cardio pulmonary resuscitation is present TSG 90 PATHFINDER Service Manual vii viii TSG 90 PATHFINDER Service Manual E CIEN Specifications Specifications Introduction The material in this section is organized into two main groupings the specifica tion tables and the supporting figures The specification tables include m NTSC general signal characteristics and test signal specifications m Signal level specifications Power supply physical and environmental specifications The supporting figures waveform diagrams and related data follow the specifi cation tables Reference Documentation The following documents were used as references in the preparation of this spec ification Product Classification Environmental Test Summary 13 June 1977 Tektronix Standard 062 2853 00 Electromagnetic Compatibility Environmental Test 31 March 1977 Tektronix Standard 062 2866 00 Recommendations and reports of the CCIR 1978 Transmission of Sound Broadcasting and Television Signals Over Long Distances CMTT IEEE Standard Dictionary of Electrical Terms Second Edition 1977 IEEE Standard 100 1977 Safety Standard for Electrical and Electronic Test Measuring Controlling and Related Equipment February 1988 ANSVISA S82 01 International El
81. y enclosed assembly or component Do not clean any plastic materials with organic cleaning solvents such as benzene tuolene xylene acetone or similar compounds because they may damage the plastic TSG 90 PATHFINDER Service Manual 4 1 Maintenance Troubleshooting Aids Static Sensitive Components A Foldout Pages The PATHFINDER contains electrical components that are susceptible to dam age from static discharge Static voltages of 1 to 30 kV are common in un protected environments CAUTION Static discharge can damage any semiconductor component in this instrument Observe the following precautions to avoid static damage m Minimize handling of static sensitive components m Transport and store static sensitive components or assemblies in their original containers on a metal rail or on conductive foam Label any package that contains static sensitive assemblies or components m Discharge the static voltage from your body by wearing a wrist strap while handling these components Servicing static sensitive assemblies or components should only be performed at a static free workstation by qualified personnel m Nothing capable of generating or holding a static charge should be allowed on the workstation surface m Keep the component leads shorted together whenever possible m Pick up components by the body never by the leads Do not slide the components over any surface W Avoid handling components

Service Manual TSG 90 PATHFINDER™ NTSC Signal Generator

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Service Manual TSG 90 PATHFINDER™ NTSC Signal Generator