Schematic Diagram 3 Component Locator Chart | Tektronix 1705A

Schematic Diagram <3> 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, 2, 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


C4	F5	A4	Q7	H3	G3				R161	B1	I6
C6	F5	B3	Q8	H1	G4	R82	F3	F5	R231	H1	N5
C7	B3	C2				R83	E3	F5	R232	H2	O6
C10	F5	C3	R31	F4	E4	R84	E3	F5	R241	E1	G5
C11	F5	C4	R32	F4	E4	R85	D4	F6	R242	E1	H5
			R33	G1	E4	R86	D3	F6
C14	G5	D2	R34	G1	E4				R243	D1	F5
C15	G5	D4	R35	G1	E5	R87	E3	F6	R244	C1	G6
C18	G5	D3				R88	E4	F6	R247	D5	F3
C19	F5	D3	R36	C3	D5	R89	C5	F2	R301	G2	G4
C20	B3	E6	R37	B3	D6	R90	D5	F3	R302	G3	G3
			R38	B4	E6	R91	C5	F3
C21	D5	F3	R39	G2	E2				R303	G3	G3
C25	H3	G3	R40	G2	E2	R92	F2	F4	R304	G1	G4
C29	H1	G3				R93	F2	F4
C30	H3	G3	R41	B4	E2	R94	E1	F4	U13A	D4	F3
C40	B1	I6	R42	B4	E3	R95	D1	F5	U13B	D4	F3
			R43	D4	E3	R96	C3	F5	U13C	D5	F3
C49	A1	J5	R44	B4	E3				U13D	D4	F3
C77	G5	L6	R45	E4	E3	R97	C1	F6	U14A	B3	F5
C79	F5	L6				R98	C2	F6
C90	H1	N5	R46	B4	E3	R102	C5	G3	U14B	D3	F5
C92	G1	G4	R47	G4	E3	R103	C5	G3	U14C	D3	F5
			R48	F4	E4	R104	H3	G3	U14D	E3	F5
CR2	F2	E2	R49	F3	E4				U16A	G4	F3
CR3	E4	E3	R50	F2	E4	R105	H3	G3	U16B	F2	F3
CR4	G3	E4				R106	G3	G3
CR5	G1	E4	R51	G1	E5	R107	G1	G4	U16C	G2	F3
CR6	E4	E3	R52	B3	E6	R108	G2	G4	U16D	G3	F3
			R53	B3	E6	R109	D2	G5	U17A	C3	F6
CR7	F3	F4	R54	D5	F2				U17B	C1	F6
CR8	E4	F6	R55	G3	E3	R110	D3	G5	U17C	C2	F6
CR11	B4	F3				R112	C3	G5
CR12	E3	F5	R56	G3	F4	R113	C2	G5	U17D	C2	F6
CR13	G2	G4	R57	F4	E4	R117	H3	G3	U18A	E1	G5
			R58	F2	E5	R118	H3	G3	U18B	E2	G5
CR14	G3	F3	R59	B3	E6				U20A	D2	G5
CR15	H1	G4	R60	D3	E5	R119	H1	G3	U20B	D2	G5
CR16	H2	H4				R120	H1	G4
CR19	H3	G3	R61	C4	E6	R121	G2	G4	U20C	E1	G5
CR20	C5	H5	R62	D3	F6	R122	E2	G4	U20D	D1	G5
			R63	D3	E6	R123	E2	G5	U23A	C3	H5
CR21	A2	H6	R64	D4	E6				U23B	C5	H5
CR24	B1	I6	R65	F2	E2	R124	E2	G5	U23C	B2	H5
CR32	G3	G4				R125	E2	G5
			R66	G3	F3	R126	D1	G6	U24A	B2	I5
J3	B2	G6	R67	G4	F4	R127	C2	G6	U24B	B1	I5
J100	C1	G5	R68	G4	F4	R128	C1	G6
J101	D1	I5	R69	F4	F4				VR1	G2	G4
J200	A3	F1	R70	F3	F4	R129	C2	G6	VR2	G4	F3
J201	B3	F1				R131	H3	H3
			R71	F3	F4	R132	H1	H3	W2	F4	E4
J202	B3	F1	R72	G4	F4	R142	A2	I6	W3	E4	E5
J203	B3	F2	R73	F2	F4	R143	B1	I6	W4	C3	E6
			R74	F2	F4				W5	F2	F4
P3	B2		R75	F2	E5	R144	B2	I6
P100	C1					R151	B1	I6	W6	F2	G4
P101	D1		R76	G3	F3	R158	A1	I5	W7	F2	G4
			R78	D5	F3	R159	A1	I5	W10	B1	I6
Q4	B4	F3	R79	E5	F3	R160	A1	I6
Q5	C4	F3	R80	F3	F4
Q6	D5	F3	R81	G2	F5

1705A

Image 201

Tektronix 1705A instruction manual Schematic Diagram 3 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 Options AccessoriesIntroduction #73 Optional Accessories Safety Information Spectrum Display SPAN/DIVFull Power Source Introduction Spectrum DisplayCRT Display Physical Characteristics Introduction Environmental CharacteristicsCertifications and Compliances EMC CAT Introduction Certifications and Compliances Meters Applications Earth SUN Satellite Using the 1705A for Satellite Communication Vancouver BC Seattle Portland Helena Boise SAN Francisco Band Input SignalsLOS Angeles SAN Diego 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 Band LNB OUTSplitter Input Operating Instructions Page Section Operating Instructions Front-panel Controls and Indicators Operating Instructions Position PowerFilter Input Display 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 Voltage Ratio Power Ratio Reading in dB Voltage Ratio Power RatioOperating Instructions DB Reference Reading in dB 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 Offset Adjust Readout ModeMain Menu Readout Position 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 Installation Mechanical InstallationLNB Power Band Input OFF Cabinet Options 875 250105 130 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 LOW Power Schott Schottky SignalCmos ECL 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 Focus Amplifier Check Maintenance High Volts Supply Fault SymptomsAxis Amplifier Check Grid Drive 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 Power Cord Options Field Upgrade KitsPower Cord Options Description of power cord Section Options Ordering Replaceable Electrical Parts Page Using the Replaceable Electrical Parts List Section Replaceable Electrical PartsParts Ordering Information Tektronix Part No Column DescriptionsColumn Column 3 Cross Index MFR. Code Number to Manufacturer Spectrum Control INC Weight STAMP INC Fulling Mill Harrisburg PA MSD INC Orange ST DARLINGTON, SC Sobudai Zawa Kanagawa 228 Japan Zman & AssociatesChrome Shibaura Tokyo Japan 2ND Floor NEW Kyoei MINATO-KU Wilhelm Westerman Circuit BD ASSY18V Power Supply Circuit BD Assypower SUPPLY, 1705ACircuit BD Assyfront Panel Circuit BD Assymain Board ASSY,1705A CAP,FXD,PLSTC100PF,5%,1600VDC/500VAC IAL,MIIN,BULK CAP,FXD,CER DI470PF,20%,100V TUBULAR,MI A1DS1 LAMP,GLOW135V MAX,1.9MA,C2A-T,WIRE LeadA1DS2 A1DS3 SQ,SIDE ADJUSTT&R SQ,TOP AdjustbulkRES,FXD,CMPSN1.5M OHM,5%,1W RES,FXD,CMPSN2.2M OHM,5%,0.5W IAL,T&R,SMALL Body RES,FXD,FILM5K OHM,0.1%,0.2W,TC=T9REELED,SMALL Body RES,FXDMETAL FILM,100K OHM,1%,0.2W,TC=100 WIRED,1705A SQ,TOP ADJUST,T&RRES,THERMAL5 OHM,10%,7A/DEG C RES,FXD,CMPSN2.4K OHM,5%,2W Part of A2DS313 LED ASSYDIR1CA ASSY,SP,ELEC34,26 AWG,5.0 L RES,VAR,PNLCP,20K OHM,20%,0.5W,LINEAR,W PLATE,ELEC Shldcircuit Board BUS,CNDCTSHIELD,ELECCIRCUIT Board SHIELD,ELEC1705A,BRS UVX1H330MAA CAP,FXD,ELCTLT33UF,+50-20%,35WVDCCAP,VAR,CER DI9-45PF,200V CAP,VAR,PLSTC1-3.5PF,500V A3CR1 CAP,FXD,MICA DI98PF,5%,500VA3CR2 DIO,SIGFAST RCVRY70V,200MA,100NS,COM FLTR,BANDPASS A3FL1A3FL2 A3FL3 COIL,RFFIXED,15NH COIL,RFFIXED,45NHCOIL,RFFIXED,64UH COIL,RFFIXED,505NH 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 Percent RES,FXD,FILM1M OHM.1%,0.2W,TC=T0CRB20FXE1K62 CRB20FXE9K35 RES,VAR,NONWWTRMR,100 OHM,20%,0.5W LIN RES,FXD,FILM2.1K OHM,1%,0.2W,TC=T0RES,FXD,WW6.3K OHM,1%,3W CRB20FXE210E GF06UT 1K Loss 10DB,PKG 7.2MM SQ,6.8MM HI RES,FXD,FILM187K OHM,1%,0.2W,TC=T0IC,CONVCMOS,A/D8-BIT,32US,SAR,DIFF IN,SER MICROCKT,DGTLMICROCOMPUTER,8 BIT IC,LINBIPOLAR,AMPLRF AMP,20DB IC,MISCCMOS,ANALOG Swquad SPST,100IC,DGTLTTL,BFR/DRVRHEX INV, OC, HI MIXER,FREQ1-500MHZ CTR,0.385 H,30 GLD,BLK,JUMPER CONN,BOXSHUNT/SHORTINGFEM,STR,1 X 2,0.1TAIL,30 GLD IAL,MI,T&R RES,FXD,WW1 OHM,5%,2W RES,FXD,FILM267K OHM,1%,0.2W,TC=T0Order by Desc RES,FXD,CMPSN1K OHM,5%,0.50W CONN,HDRPCB/WIREWRAP,MALE,STR,1 X 4,0.150 CONN,HDRPCB/WIREWRAP,MALE,STR,1 X 7,0.15CORE,EMTOROID,FERRITE COIL,RFFIXED,150NH Controlled 0LUA3 A10SKT1CONN,RF Plug CA ASSY,SP Replaceable Electrical Parts Diagrams/Circuit Board Illustrations Page Symbols Diagrams/Circuit Board IllustrationsAssembly Numbers Component ValuesPage 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 Ramp Generator Band LinearityMarker Generator Schematic Diagram 4 Component Locator Chart Amplifier DeflectionFilter Buffers Schematic Diagram 5 Component Locator Chart Microprocessor 1705A Spectrum MonitorMicroprocessor Trace 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 Error SwitcherLine Rectifier Output Filters A10 CRT Socket Board Front of Board Schematic Diagram 8 Component Locator Chart 1705A Spectrum Monitor High Volts Power Supply Error AMPHV OSC Grid DrivePage Replaceable Mechanical Parts Page Section Replaceable Mechanical Parts Using the Replaceable Mechanical Parts List Replaceable Mechanical Parts Qty ColumnThis indicates the quantity of mechanical parts used Indicates actual manufacturer’s part number Richco Panduit Corp RidgelandCHICAGO, IL Nelson Name Plate CO Casitas COVER,HOUSINGALUMINUM Circuit BD Assypower Supply See A1 Repl Mounting PartsFRAME,CRTBEZEL SCREW,MACHINE6-32 X 0.875,PNH,SST FRAME,CHASSISSAFETY Controlled HOUSING,CKT BdaluminumSCREW,MACHINE6-32 X 0.188,PNH,STL IN/OUT See A6 Repl Mounting Parts CLAMP,LOOP0.375 ID,PLASTIC,SAFETY CON Trolled Standard AccessoriesStandard only Optional Accessories CA ASSY,CRTDISCRETE,ANODE LEAD,CRT,1,22 A10