Schematic Diagram 2 Component Locator Chart | Tektronix 1705A

Schematic Diagram <2> Component Locator Chart

The schematic diagram has an alphanumeric grid to assist in locating parts within that diagram. Assembly A3. Partial Assembly A3 also shown on Diagrams 1, 3, 4, and 5.

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


C31	G1	H2	C74	F4	L3	L15	G4	L4	R173	E2	J1
C32	H1	H2				L16	B2	M2
C33	G1	H3	C81	G5	L4	L17	E2	J1	R174	E2	J1
C34	H1	H3	C82	G4	L4	L18	E2	J1	R175	C4	J4
C35	H1	H4	C83	F5	L5				R181	D2	J1
			C85	A2	M2	P5	H1		R182	E3	J2
C36	E3	I2	C87	F4	M3	P6	F1		R183	D4	J4
C37	B5	I3				P10	E4
C39	F2	I1	C88	H4	M5				R187	D3	K1
C41	E2	I1	C100	G5	L5	Q9	B3	I4	R195	E5	L5
C42	E2	J1	C101	E2	J1	Q10	B4	I4	R196	F4	L4
						Q11	F2	J1	R201	A1	L3
C43	F2	J2	CR22	C5	I4	Q12	D2	J1	R202	F4	L3
C44	C5	J3	CR23	C4	I4	Q13	E2	J1
C45	C5	J3	CR25	C5	I3	Q24	H4	M5	R203	F4	L3
C46	B4	J4	CR26	C4	I4	Q25	G4	M6	R206	A2	L3
C47	B4	J4							R207	B2	M3
			CR27	E4	K4	R136	G1	H2	R208	H3	M5
C48	D4	J4	CR28	E4	K4	R137	H1	H3	R218	H4	M6
C50	D2	J2	CR29	E5	K4	R138	A4	H5
C51	F3	J2	CR30	E5	K4	R141	G1	I3	R219	G3	M6
C52	C5	J3				R145	G1	I3	R222	H4	M5
C53	D4	J4	FL1	C2	K1
			FL2	B1	J2	R146	G1	I3	T1	A1	L2
C54	E2	J1	FL3	F4	M4	R147	B5	I3
C55	D2	J1	FL4	F4	M4	R148	B5	I4	U22	G1	H3
C56	D4	J4				R149	A3	I4	U23D	A4	H5
C57	D4	J4	J5	H1	H4	R150	A4	I4	U23E	A4	H5
C58	D4	J4	J6	F1	I2				U23F	A3	H5
			J10	E3	K3	R153	F2	I1	U25	F1	J3
C59	D2	K1				R154	F2	I2
C60	D2	K1	L1	B5	I4	R155	B4	I4	U28	B2	L2
C61	E3	K2	L2	B5	I3	R156	B3	I4	U29	E4	L3
C62	D5	K3	L3	B4	I4	R157	B4	I4	U31	B3	L2
C63	C2	K1	L4	E2	I1				U32	G4	L4
			L5	C5	J4	R163	E2	J1
C64	D5	K3				R164	E2	J1	VR3	G1	I2
C66	D5	K3	L6	D2	K1	R165	F2	I2
C67	D5	K4	L7	D4	K4	R166	F2	I2	W13	B3	J2
C68	E4	L4	L8	D4	K4	R167	B4	I5
C69	B3	L1	L9	D5	K4				Y2	E2	J1
			L10	E5	K4	R169	E2	J1	Y3	C5	J3
C70	E4	L3				R170	F2	J2	Y4	D5	K3
C71	B3	L2	L11	B3	L1	R171	B4	J4
C72	A3	L2	L12	B3	L1	R172	D4	J4
C73	F4	L3	L14	F4	L3

1705A

Image 199

Tektronix 1705A instruction manual Schematic Diagram 2 Component Locator Chart

Contents

1705A Spectrum Monitor SN B040000 and Above 070-8222-08 Table of Contents Table of Contents InstallationTheory 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 Preface InstallationIntroduction Replaceable Mechanical Parts Preface Contacting TektronixUSA Preface Xvi Introduction Page Section Introduction Typical Configurations #73 AccessoriesOptions Introduction Optional Accessories Safety Information SPAN/DIV Spectrum DisplayFull Introduction Spectrum Display Power SourceCRT 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 MID Minimum Maximum FrequencyFrequency Scale = 10 Divisions Sweep Length = 12 Divisions 70 MHZ Center Frequency ReadoutMHZ 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 Section Theory of Operation Block DiagramOverview 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 Recommended Equipment List Section Checks And AdjustmentsElectrical Instruments Auxiliary Equipment Checks and Adjustments SMA Male-to-bnc Female Adapter Short-Form ProcedurePerformance 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 Front A3 Main BDA1 PWR Sply BD Tek Shorting Remove the shorting strap 1705A Spectrum MonitorStrap 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 Maintenance Test Selectable Components Mechanical Disassembly/AssemblyBezel 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 Section Replaceable Electrical Parts Using the Replaceable Electrical Parts ListParts 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 GF06UT 2K ADJUSTT&RRES NTWK,FXD,FI10K OHM,20%,9RES GF06UT 5K RES,FXD,FILM237K OHM,1%,0.2W,TC=T0 RES,FXD,FILM115K 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 Component Locator A1 Power Supply BoardSee 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