Schematic Diagram 6 Component Locator Chart | Tektronix 1705A

A2 Front Panel Board

Static Sensitive Devices

See Maintenance Section

A4 18V Power Supply Board

Schematic Diagram <6> Component Locator Chart

The schematic diagram has an alphanumeric grid to assist in locating parts within that diagram.

Assembly A2 and A4.

Comp	Diag	Bd	Comp	Diag	Bd
No	Loc	Loc	No	Loc	Loc


A2			A4

DS112	A1		C491	D4	B1
DS112A	B1		C497	D4	C1
DS112B	A3		C580	C4	A1
DS112C	B3		C581	C4	A2
DS129	B1		C583	B5	A1
DS129A	B1		C682	A5	A2
DS129B	B3		C683	B5	A2
DS129C	B1		C684	B5	B2
DS130	B1		C690	E4	B2
DS144	C1		C697	F4	C2
			C782	A5	A3
DS144A	C1
DS144B	B3		CR481	C4	A1
DS144C	C1		CR485	D4	B1
DS145	C1		CR494	D4	C1
DS319	A2		CR594	D4	D1
DS319A	A2		DS698	F5	C2
DS319B	B3
DS319C	B2		J698	G4	D2
DS319D	B3
DS319E	C2		L591	D4	B1
			L695	F4	C2
DS319F	B3
DS319G	D2		Q481	C4	A1
DS325	B2		Q482	C5	A1
DS330	B2		Q588	E5	B2
DS337	B2		Q596	D4	D1
			Q783	B5	B3
J303	H1	A2
			R485	C4	B1
R211	E2	A1	R494	D4	C1
R235	F3	B2	R581	C4	A2
R343	D2	C3	R585	D4	B1
R411	F3	A3	R586	B5	B2
R419	E3	A3
			R587	E5	B1
R428	E3	B3	R588	D5	B1
R444	D2	C3	R680	A5	A2
R511	D3	A4	R681	A5	A2
R528	D3	B4	R682	B5	A2
S109	E1	A1	R685	C5	B2
S123	F1	B1	R686	C5	B2
S139	E1	C1	R687	E4	B2
S311	E2	A2	R688	E4	B2
S345	F2	C2	R690	E4	B2
			R691	E4	B2
			R692	F4	B2
			R693	F4	B2
			R696	F4	C2
			S100	G5
			U583	C5	A2
			W698	G4

1705A

Image 207

Tektronix 1705A instruction manual Schematic Diagram 6 Component Locator Chart

Contents

1705A Spectrum Monitor SN B040000 and Above 070-8222-08 Table of Contents Installation Table of ContentsTheory of Operation 1705A Spectrum Monitor Iii Checks and Adjustments Options Maintenance Replaceable Electrical Parts Replaceable Electrical PartsReplaceable Mechanical Parts 10-1 Simulation of a 1705A Full SPAN/DIV display List of Figures 1705A Spectrum Monitor Vii Considerations for custom installation of an instrument Viii List of Tables General Safety Summary General Safety Summary Service Safety Summary Service Safety Summary Xii Installation PrefaceIntroduction Replaceable Mechanical Parts Contacting Tektronix PrefaceUSA Preface Xvi Introduction Page Section Introduction Typical Configurations #73 AccessoriesOptions Introduction Optional Accessories Safety Information Spectrum Display SPAN/DIVFull Power Source Introduction Spectrum DisplayCRT Display EMC Introduction Environmental CharacteristicsPhysical Characteristics Certifications and Compliances CAT Introduction Certifications and Compliances Meters Applications Earth SUN Satellite Using the 1705A for Satellite Communication SAN Diego Band Input SignalsVancouver BC Seattle Portland Helena Boise SAN Francisco LOS Angeles Zeroing in on a Satellite Tek 12.20 GHZ Frequency and Number Down Link Transponder Horizontal Vertical Polarization GHZ Looking at Exciters with the 70 MHz Input Miscellaneous Uses for the 1705A Input LNB OUTBand Splitter Operating Instructions Page Section Operating Instructions Front-panel Controls and Indicators Display Position PowerOperating Instructions Filter Input SPAN/DIV Variable control that adjusts the display brightness Position Rear- Panel Connectors Spectrum Monitor Holder for the instrument’s mains fuse 1400 MHZ Powering- up 1705A graticule scale Measurement Graticule Reading in dB Reading in dB Voltage Ratio Power RatioVoltage Ratio Power Ratio Operating Instructions DB Reference Operating Instructions DBm to v Conversion Reading in dBm 75Ω 50Ω Minimum Maximum Frequency MIDFrequency Scale = 10 Divisions Sweep Length = 12 Divisions Center Frequency Readout 70 MHZMHZ 1400 MHZ Center Frequency Tuned AT this Point Point on Trace That Corresponds to Customizing Frequency Readout Readout Position Readout ModeOffset Adjust Main Menu 12.00 GHZ Locating Ku- Band Satellites Basic Operating Procedure Satcom K2 G-STAR City 1705A Spectrum Monitor Operating Instructions Page Page Installation Page Electrical Installation Section Installation Cabinet Options Mechanical InstallationInstallation LNB Power Band Input OFF 130 250875 105 Cabinetizing 1700F02 portable cabinet dimensions Cabinet Securing Screws A WFM7F05 with a blank front panel 1700F06 1700F07 1705A Spectrum Monitor Theory of Operation Page Block Diagram Section Theory of OperationOverview Theory of Operation Front Panel Diagram RF Input Diagram If Amplifier Diagram Resolution Filter and Log Detector Sweep Generator Diagram Start Display Deflection Amplifiers Diagram Vertical Deflection Amplifier Microprocessor Diagram Front Panel Diagram High Load LOW Load Average Low Voltage Power Supply Diagram Pulse Width Modulator Theory of Operation High Voltage Power Supply Diagram Axis Amplifier Pinout of the CRT Socket 1705A Spectrum Monitor CRT The pinout for the CRT is shown in Figure Theory of Operation Checks and Adjustments Page Section Checks And Adjustments Recommended Equipment ListElectrical Instruments Auxiliary Equipment Short-Form Procedure Checks and Adjustments SMA Male-to-bnc Female AdapterPerformance Check 1705A Spectrum Monitor Long Form Procedure Checks and Adjustments Preliminary Control Settings Page Marker Here Marker is +/-- 1 Minor Division from Here Checks and Adjustments 1705A Spectrum Monitor Page Variable Autotransformer L-BAND Input Marker Here Graticule Line Disregard UHF Sine Wave Generator Page End of the Performance Check Procedure Short- Form Procedure Adjustment Procedure Video SPAN/DIV Full Center Frequency Preliminary Setup A3 Main BD FrontA1 PWR Sply BD Tek Remove the shorting strap 1705A Spectrum Monitor ShortingStrap 1705A Spectrum Monitor Page 1705A Spectrum Monitor Page 1705A Spectrum Monitor End of Adjustment Procedure Checks and Adjustments Maintenance Page Cleaning Section Maintenance ECL Schottky SignalLOW Power Schott Cmos Troubleshooting Diagnostic Routines Nonvolatile 2444 RAM Test Reading Data Stored AT 60H to 7F in Processor Error Cannot Read or Write Press Input KEY to Exit Troubleshooting Aids Circuit board assembly locations Major Assembly Interconnection PIN ROW B ROW a Power Supply Fault Symptoms Power Supply Troubleshooting Procedure Low Volts Supply Maintenance Power Supply Fault Symptoms Maintenance Rectifier/Switcher Check High Volts Supply Grid Drive Check Maintenance High Volts Supply Fault SymptomsFocus Amplifier Check Axis Amplifier Check CRT Voltage Check High Voltage Oscillator Check Obtaining Replacement Parts Corrective Maintenance Mechanical Disassembly/Assembly Maintenance Test Selectable ComponentsBezel Removal Graticule Light Removal and Replacement Replacing the CRT Removal of the CRT Removal of the Rear Panel Removal of Front- Panel Assembly Removing the L- Band Tuner Removal Replacement of the Main Board Removal Replacement of the Power Supply Board Front Removing the LNB Power Supply Board Repackaging 1705A Spectrum Monitor Options Page Section Options Field Upgrade KitsPower Cord Options Power Cord Options Description of power cord Ordering Replaceable Electrical Parts Page Using the Replaceable Electrical Parts List Section Replaceable Electrical PartsParts Ordering Information Column 3 Column DescriptionsTektronix Part No Column MSD INC Orange ST DARLINGTON, SC Spectrum Control INC Weight STCross Index MFR. Code Number to Manufacturer AMP INC Fulling Mill Harrisburg PA Wilhelm Westerman Zman & AssociatesSobudai Zawa Kanagawa 228 Japan Chrome Shibaura Tokyo Japan 2ND Floor NEW Kyoei MINATO-KU Circuit BD Assymain Board ASSY,1705A Circuit BD Assypower SUPPLY, 1705ACircuit BD ASSY18V Power Supply Circuit BD Assyfront Panel CAP,FXD,CER DI470PF,20%,100V TUBULAR,MI IAL,MICAP,FXD,PLSTC100PF,5%,1600VDC/500VAC IN,BULK A1DS3 LAMP,GLOW135V MAX,1.9MA,C2A-T,WIRE LeadA1DS1 A1DS2 RES,FXD,CMPSN2.2M OHM,5%,0.5W SQ,TOP AdjustbulkSQ,SIDE ADJUSTT&R RES,FXD,CMPSN1.5M OHM,5%,1W RES,FXDMETAL FILM,100K OHM,1%,0.2W,TC=100 RES,FXD,FILM5K OHM,0.1%,0.2W,TC=T9IAL,T&R,SMALL Body REELED,SMALL Body RES,FXD,CMPSN2.4K OHM,5%,2W SQ,TOP ADJUST,T&RWIRED,1705A RES,THERMAL5 OHM,10%,7A/DEG C RES,VAR,PNLCP,20K OHM,20%,0.5W,LINEAR,W LED ASSYDIR1Part of A2DS313 CA ASSY,SP,ELEC34,26 AWG,5.0 L SHIELD,ELEC1705A,BRS BUS,CNDCTPLATE,ELEC Shldcircuit Board SHIELD,ELECCIRCUIT Board CAP,VAR,PLSTC1-3.5PF,500V CAP,FXD,ELCTLT33UF,+50-20%,35WVDCUVX1H330MAA CAP,VAR,CER DI9-45PF,200V DIO,SIGFAST RCVRY70V,200MA,100NS,COM CAP,FXD,MICA DI98PF,5%,500VA3CR1 A3CR2 A3FL3 A3FL1FLTR,BANDPASS A3FL2 COIL,RFFIXED,505NH COIL,RFFIXED,45NHCOIL,RFFIXED,15NH COIL,RFFIXED,64UH ADJUSTT&R GF06UT 2KRES NTWK,FXD,FI10K OHM,20%,9RES GF06UT 5K RES,FXD,FILM115K OHM,1%,0.2W,TC=T0 RES,FXD,FILM237K OHM,1%,0.2W,TC=T0RES,FXD,FILM3.4K OHM,1%,0.2W,TC=T0 RES,VAR,NONWWTRMR,250 OHM,20%,0.5W LIN RES,FXD,FILM7.5K OHM,1%,0.2W,TC=T0 CRB20FXE9K35 RES,FXD,FILM1M OHM.1%,0.2W,TC=T0Percent CRB20FXE1K62 CRB20FXE210E RES,FXD,FILM2.1K OHM,1%,0.2W,TC=T0RES,VAR,NONWWTRMR,100 OHM,20%,0.5W LIN RES,FXD,WW6.3K OHM,1%,3W GF06UT 1K MICROCKT,DGTLMICROCOMPUTER,8 BIT RES,FXD,FILM187K OHM,1%,0.2W,TC=T0Loss 10DB,PKG 7.2MM SQ,6.8MM HI IC,CONVCMOS,A/D8-BIT,32US,SAR,DIFF IN,SER MIXER,FREQ1-500MHZ IC,MISCCMOS,ANALOG Swquad SPST,100IC,LINBIPOLAR,AMPLRF AMP,20DB IC,DGTLTTL,BFR/DRVRHEX INV, OC, HI IAL,MI,T&R CONN,BOXSHUNT/SHORTINGFEM,STR,1 X 2,0.1CTR,0.385 H,30 GLD,BLK,JUMPER TAIL,30 GLD RES,FXD,CMPSN1K OHM,5%,0.50W RES,FXD,FILM267K OHM,1%,0.2W,TC=T0RES,FXD,WW1 OHM,5%,2W Order by Desc COIL,RFFIXED,150NH CONN,HDRPCB/WIREWRAP,MALE,STR,1 X 7,0.15CONN,HDRPCB/WIREWRAP,MALE,STR,1 X 4,0.150 CORE,EMTOROID,FERRITE CA ASSY,SP A10SKT1Controlled 0LUA3 CONN,RF Plug Replaceable Electrical Parts Diagrams/Circuit Board Illustrations Page Component Values Diagrams/Circuit Board IllustrationsSymbols Assembly NumbersPage 1705A Spectrum Monitor A3 Main Board Component Locator With cross-references to schematic diagrams 1, 2, 3, 4, A5 70 MHz Tuner Board A3 Main Board Schematic Diagram 1 Component Locator Chart 1705A Spectrum Monitor RF Input Local Oscillator Schematic Diagram 2 Component Locator Chart 1705A Spectrum Monitor If Amplifier Resolution Filter & LOG Detector Schematic Diagram 3 Component Locator Chart Generator Band LinearityRamp Generator Marker Schematic Diagram 4 Component Locator Chart Buffers DeflectionAmplifier Filter Schematic Diagram 5 Component Locator Chart Trace 1705A Spectrum MonitorMicroprocessor Microprocessor Schematic Diagram 6 Component Locator Chart A2 Front Panel Board 1705A Spectrum Monitor Front Panel & 18V Supply A1 Power Supply Board A1 Power Supply Board Component LocatorSee Parts List for Effective Serial Number Ranges Output Filters SwitcherError Line Rectifier A10 CRT Socket Board Front of Board Schematic Diagram 8 Component Locator Chart Grid Drive Error AMP1705A Spectrum Monitor High Volts Power Supply HV OSCPage Replaceable Mechanical Parts Page Section Replaceable Mechanical Parts Using the Replaceable Mechanical Parts List Indicates actual manufacturer’s part number Qty ColumnReplaceable Mechanical Parts This indicates the quantity of mechanical parts used Nelson Name Plate CO Casitas Panduit Corp RidgelandRichco CHICAGO, IL SCREW,MACHINE6-32 X 0.875,PNH,SST Circuit BD Assypower Supply See A1 Repl Mounting PartsCOVER,HOUSINGALUMINUM FRAME,CRTBEZEL IN/OUT See A6 Repl Mounting Parts HOUSING,CKT BdaluminumFRAME,CHASSISSAFETY Controlled SCREW,MACHINE6-32 X 0.188,PNH,STL CA ASSY,CRTDISCRETE,ANODE LEAD,CRT,1,22 Standard AccessoriesCLAMP,LOOP0.375 ID,PLASTIC,SAFETY CON Trolled Standard only Optional Accessories A10