Audio international PA-7500A Instrukcja Obsługi

Instruction Manual1720/1721Vectorscope (S/N B060000 & Above)070-5846-07www.tektronix.comWarningThe servicing instructions are for use by qualified

Table of Contentsvi1720/1721Figure 4-2: Block diagram of the Phase Lock Loop 4--7...Figure 5-1: Rear view of Remote plug

Checks and Adjustments5-21720/1721PAL TEKTRONIX 1411 with Option AA and Option AB (modified SPG12and TSG11) and TSG13.PAL-M TEKTRONIX 1412 with Option

Checks and Adjustments1720/17215-3For example: A TEKTRONIX TM506 Power Module.7. Variable AutotransformerFor example: General Radio Metered Auto T ran

Checks and Adjustments5-41720/172114. Dual Input CouplerMatched BNC cable-T for making phase comparisons between two inputs.Matched length of the two

Checks and Adjustments1720/17215-5Performance Check Procedure Short-Form ReferenceThe short-form reference table is intended for those who are familia

Checks and Adjustments5-61720/1721Performance Check Procedure1. Preliminary Setupa. Connect the variable autotransformer to the AC power connector. Tu

Checks and Adjustments1720/17215-71720/1721 (rear)Black burst75Ω Termination1410--Series (rear)Figure 5-2: Loop-through connection of black burst sign

Checks and Adjustments5-81720/1721Figure 5-3: Using the vector graticule - 3 dB markings to measure bandwidth.Amplitude is set to the compass rose at

Checks and Adjustments1720/17215-9c. CHECK -- that all of the vectors fall within ±1.25° and ±1.25 IRE(NTSC and PAL-M), or ±1.25° and ±2.5% (PAL) of t

Checks and Adjustments5-101720/1721

Checks and Adjustments1720/17215-11staircase) to the burst cross on the horizontal graticule axis. Use thesmall dot on the --U axis for PAL and PAL-M.

Table of Contents1720/1721viiList of TablesTable 1--1: Signal Input 1--4...Table 1--2: Vector Mode 1--5

Checks and Adjustments5-121720/1721g. Disconnect the Black Burst signal and the terminators from the1720/1721.11. Return LossRequirement -- Video Inpu

Checks and Adjustments1720/17215-13o. Remove the precision high-frequency terminator from the RF Bridge.p. Connect the male-to-male bnc adapter to the

Checks and Adjustments5-141720/1721123456789101112131415+YINPUT+Y HIGHGAIN INPUT-- XINPUT+XINPUT-- YINPUT+X HIGHGAIN INPUT-- YINPUT-- XINPUTGND GND GN

Checks and Adjustments1720/17215-15MinimumopeningFigure 5-6: Audio frequency XY display.14. Check XY Frequency ResponseREQUIREMENT -- The --3 dB point

Checks and Adjustments5-161720/1721Perform parts i. through p. only if internal jumpers J920 and J921 (Mainboard) are set to High Gain mode.i. Connect

Checks and Adjustments1720/17215-17Adjustment ProcedureThis procedure is divided into two parts. The first, a short form, is an outline ofthe full pro

Checks and Adjustments5-181720/17211720/1721 (rear)Black burst75Ω Termination1410--Series (rear)Color bar75Ω TerminatorFigure 5-8: Starting connection

Checks and Adjustments1720/17215-19Table 5- 2: Adjustment Procedure Short-Form ReferenceStep # Step NameAdjustedComponentsPage #1 Adjust +5 V R99 5--2

Checks and Adjustments5-201720/1721Long-Form Adjustment ProcedureSee the Front-Panel Presets and S ignal Connections in the Adjustment Procedureintrod

Checks and Adjustments1720/17215-21g. Adjust R571 (Orthogonality) on the Main board for a straight verticalline parallel to the Y axis.h. Disconnect t

viii1720/1721General Safety SummaryReview the following safety precautions to avoid injury and prevent damage tothis product or any products connected

Checks and Adjustments5-221720/1721c. Change the Television Signal Generator’s subcarrier frequency by--50 Hz for NTSC and PAL-M (--10 Hz for PAL).d.

Checks and Adjustments1720/17215-23b. Connect the Function Generator red clip lead to pin 7 ( +Y) on therear-panel X Y INPUT connector. Connect the Fu

Checks and Adjustments5-241720/1721b. Hold the REF switch in until the TEST indicator lights.c. Set the front-panel GAIN CAL to midrange.d. Position t

Checks and Adjustments1720/17215-2515. Adjust Line Select FocusWith a 1730-Series Waveform Monitor:a. Connect an Auxiliary cable between the 1720/1721

Checks and Adjustments5-261720/1721

Maintenance

1720/17216-1Section 6MaintenanceThis section contains instructions for preventive maintenance, general trouble-shooting, Serial Port and LED Driver di

Maintenance6-21720/1721(high-velocity air can damage some parts). Hardened dirt or grease may beremoved with a cotton-tipped applicator dampened with

Maintenance1720/17216-3Table 6- 1: (Cont.)Static SusceptibilityRelative Suscepti bility Levels Voltage7 LINEAR CIRCUITS 400 to 1000 V est.8 LOW POWER

General Safety Summary1720/1721ixTerms in this Manual. These terms may appear in this manual:WARNING. Warning statements identify conditions or practi

Maintenance6-41720/1721TroubleshootingThe material contained here is general and is not intended to cover specific cases.Note that the manual itself i

Maintenance1720/17216-5A2 Front Panel BoardA3 Main BoardA1 Power Supply BoardFigure 6-1: Circuit board assembly locationsThere are two separate parts

Maintenance6-61720/1721numbers that identify terminal connectors; numerals are used from 2 up. Atriangular key symbol is used to identify pin 1 on the

Maintenance1720/17216-7Instructions in Section 2), and by being sure that a malfunction has notoccurred down stream from the vectorscope.2. Determine

Maintenance6-81720/1721Specific Troubleshooting ProceduresTwo areas of the the 1720/1721 instrument require specific troubleshootingmethods. The power

Maintenance1720/17216-9determining which section of the power supply the problem is in. Apply acpower and turn on the power supply. From Table 6--2, d

Maintenance6-101720/1721NOTE. Low Volts Supply Power Connection:The Low Volts power supply troubleshooting is performed without applying acpower.b. Di

Maintenance1720/17216-11c. Connect the positive output from the 20 VDC Power Supply to TP1.Connect the negative output to W3 (--15 V). The circuit sho

Maintenance6-121720/1721b. Connect the negative output of another variable DC power supply toTP1. Connect the positive output to W4 (+15 V). Set the v

Maintenance1720/17216-133. Z-Axis Amplifier Ch ecka. Unsolder and lift one end of R8.b. Power up the power supply.c. Using the digital multimeter, mea

xPrefaceThis manual documents the TEKTRONIX 1720/1721 Vectorscope. Informationthat applies to all instruments in the series refers to t he 1720/1721.

Maintenance6-141720/17216. CRT Voltage CheckNOTE. High Voltage Probe:This check requires a high voltage probe having an input resistance of 1 GΩ ormor

Maintenance1720/17216-155. Turn off POWER. This ends the Diagnostic Procedure. When the1720/1721 is powered up again it will be operating in the norma

Maintenance6-161720/1721Mechanical Disassembly/AssemblyThe instructions contained here are for disassembly. Re-assembly is performedby reversing the o

Maintenance1720/17216-17Remove these screws in orderto remove the bezelFigure 6-3: Screws that need to be removed to remove the bezel.For graticule li

Maintenance6-181720/17213. To install a bulb, hold it with the tweezers as described in step 2, position itin front of the socket and push the bulb wi

Maintenance1720/17216-19WARNING. The CRT may retain a dangerous charge. Ground the the anodeconnector to discharge the CRT. Do not allow the conductor

Maintenance6-201720/1721VECTORSCOPEINPUT75 OHM LOOP--THROUGHCH--B EXT REFX Y INPUTAUXILIARY CONTROLINDE-MODOUTCH--ARemove these five (5)screws to remo

Maintenance1720/17216-21To remove frontpanel assemblyTo remove frontpanel assemblyTo separate boardfrom the front panelFigure 6-5: Screws that hold th

Maintenance6-221720/1721J216J153J933A3 Main BdFrontFigure 6-6: Screws holding the main circuit board (A3) in place.5. Remove the board by sliding it t

Maintenance1720/17216-238. To replace the board, reverse this procedure.A1 Pwr Supply BdJ4J2J1 J3FrontGroundshieldFigure 6-7: Screws holding the Power

PrefacexiSection 9, Diagrams, contains servicing illustrations. These include adjustmentlocations, circuit board part locations, a block diagram, sche

Maintenance6-241720/1721

Options

1720/17217-1Section 7OptionsThis section describes instrument options and customer-installable Field Upgrade Kitsfor the 1720/1721.OptionsThe standard

Options7-21720/1721the installation of these instruments. Only a brief description is provided here,for more information contact a Tektronix field off

Replaceable Electrical Parts

1720/17218-1Replaceable Electrical PartsThis section contains a list of the components that are replaceable for the1720/1721. Use this list to identif

Replaceable Electrical Parts8-21720/1721A list of assemblies can be found at the beginning of the electrical parts list. Theassemblies are listed in n

Replaceable Electrical Parts1720/17218-3The mechanical subparts are shown as *ATTACHED PARTS* / *END AT-TACHED PARTS* or *MOUNTING PARTS* / *END MOUNT

Prefacexii

Replaceable Electrical Parts8-41720/1721Cross Index - Mfr. Code Number To ManufacturerMfr.code.Manufacturer Address City, state, zip code00779 AMP INC

Replaceable Electrical Parts1720/17218-5Mfr.code.City, state, zi p cod eAddressManufacturer33096 COLORADO CRYSTAL CORP 2303 W 8TH ST LOVELAND CO 80537

Replaceable Electrical Parts8-61720/1721Mfr.code.City, state, zi p cod eAddressManufacturerTK1617 CRAFT FACTORY PLASTICS 17145 SW ALEXANDER ALOHA OR 9

Replaceable Electrical Parts1720/17218-7Replaceable Electrical PartsComponentnumberTektronixpart numberSerial / Assembly numberEffective DiscontinuedN

Replaceable Electrical Parts8-81720/1721ComponentnumberMfr. partnumberMfr.codeName & descriptionSerial / Assembly numberEffective DiscontinuedTekt

Replaceable Electrical Parts1720/17218-9ComponentnumberMfr. partnumberMfr.codeName & descriptionSerial / Assembly numberEffective DiscontinuedTekt

Replaceable Electrical Parts8-101720/1721ComponentnumberMfr. partnumberMfr.codeName & descriptionSerial / Assembly numberEffective DiscontinuedTek

Replaceable Electrical Parts1720/17218-11ComponentnumberMfr. partnumberMfr.codeName & descriptionSerial / Assembly numberEffective DiscontinuedTek

Replaceable Electrical Parts8-121720/1721ComponentnumberMfr. partnumberMfr.codeName & descriptionSerial / Assembly numberEffective DiscontinuedTek

Replaceable Electrical Parts1720/17218-13ComponentnumberMfr. partnumberMfr.codeName & descriptionSerial / Assembly numberEffective DiscontinuedTek

Introduction and Specifications

Replaceable Electrical Parts8-141720/1721ComponentnumberMfr. partnumberMfr.codeName & descriptionSerial / Assembly numberEffective DiscontinuedTek

Replaceable Electrical Parts1720/17218-15ComponentnumberMfr. partnumberMfr.codeName & descriptionSerial / Assembly numberEffective DiscontinuedTek

Replaceable Electrical Parts8-161720/1721ComponentnumberMfr. partnumberMfr.codeName & descriptionSerial / Assembly numberEffective DiscontinuedTek

Replaceable Electrical Parts1720/17218-17ComponentnumberMfr. partnumberMfr.codeName & descriptionSerial / Assembly numberEffective DiscontinuedTek

Replaceable Electrical Parts8-181720/1721ComponentnumberMfr. partnumberMfr.codeName & descriptionSerial / Assembly numberEffective DiscontinuedTek

Replaceable Electrical Parts1720/17218-19ComponentnumberMfr. partnumberMfr.codeName & descriptionSerial / Assembly numberEffective DiscontinuedTek

Replaceable Electrical Parts8-201720/1721ComponentnumberMfr. partnumberMfr.codeName & descriptionSerial / Assembly numberEffective DiscontinuedTek

Replaceable Electrical Parts1720/17218-21ComponentnumberMfr. partnumberMfr.codeName & descriptionSerial / Assembly numberEffective DiscontinuedTek

Replaceable Electrical Parts8-221720/1721ComponentnumberMfr. partnumberMfr.codeName & descriptionSerial / Assembly numberEffective DiscontinuedTek

Replaceable Electrical Parts1720/17218-23ComponentnumberMfr. partnumberMfr.codeName & descriptionSerial / Assembly numberEffective DiscontinuedTek

Replaceable Electrical Parts8-241720/1721ComponentnumberMfr. partnumberMfr.codeName & descriptionSerial / Assembly numberEffective DiscontinuedTek

Replaceable Electrical Parts1720/17218-25ComponentnumberMfr. partnumberMfr.codeName & descriptionSerial / Assembly numberEffective DiscontinuedTek

Replaceable Electrical Parts8-261720/1721ComponentnumberMfr. partnumberMfr.codeName & descriptionSerial / Assembly numberEffective DiscontinuedTek

Replaceable Electrical Parts1720/17218-27ComponentnumberMfr. partnumberMfr.codeName & descriptionSerial / Assembly numberEffective DiscontinuedTek

Replaceable Electrical Parts8-281720/1721ComponentnumberMfr. partnumberMfr.codeName & descriptionSerial / Assembly numberEffective DiscontinuedTek

Replaceable Electrical Parts1720/17218-29ComponentnumberMfr. partnumberMfr.codeName & descriptionSerial / Assembly numberEffective DiscontinuedTek

Replaceable Electrical Parts8-301720/1721ComponentnumberMfr. partnumberMfr.codeName & descriptionSerial / Assembly numberEffective DiscontinuedTek

Replaceable Electrical Parts1720/17218-31ComponentnumberMfr. partnumberMfr.codeName & descriptionSerial / Assembly numberEffective DiscontinuedTek

Replaceable Electrical Parts8-321720/1721ComponentnumberMfr. partnumberMfr.codeName & descriptionSerial / Assembly numberEffective DiscontinuedTek

Diagrams/Circuit Board Illustrations

1720/17211-1Section 1Introduction and SpecificationsThe TEKTRONIX 1720/1721 is an 8-1/2”--wide by 5-1/4”--high Vectorscope,weighing 8-1/2 pounds. Both

Replaceable Mechanical Parts

10--11720/1721Replaceable Mechanical PartsThis section contains a list of the components that are replaceable for the1720/1721. Use this list to ident

Replaceable Mechanical Parts10- 21720/1721Chassis-mounted parts and cable assemblies are located at the end of theReplaceable Electrical Parts list.Co

Replaceable Mechanical Parts10--31720/1721Cross Index - Mfr. Code Number To ManufacturerMfr.codeManufacturer Address City, state, zi p code06915 RICHC

Replaceable Mechanical Parts10- 41720/1721Replaceable Mechanical PartsFig. &indexno.Tektronixpart no.Serial numberEffecti ve DscontQty Name &

Replaceable Mechanical Parts10--51720/1721Fig. &indexno.Mfr. part no.Mfr.codeName & descriptionQtySerial numberEffecti ve DscontTektronixpart

Replaceable Mechanical Parts10- 61720/1721Fig. &indexno.Mfr. part no.Mfr.codeName & descriptionQtySerial numberEffecti ve DscontTektronixpart

Replaceable Mechanical Parts10--71720/1721Fig. &indexno.Mfr. part no.Mfr.codeName & descriptionQtySerial numberEffecti ve DscontTektronixpart

Copyright E Tekt ronix, Inc., 1986, 1990, 1993, 1995. All rights reserved.Tektroni x products are covere d by U.S. and foreign patents, issued andpend

Introduction and Specifications1-21720/1721AccessoriesThe 1720/1721 is shipped with a set of accessories that are needed for itsinstallation or day-to

Replaceable Mechanical Parts10- 81720/1721

Introduction and Specifications1720/17211-3Safety Information1720/1721 instruments are intended to operate from an ac power source that willnot apply

Introduction and Specifications1-41720/1721Table 1- 1: Signal inputCharacteri sti cs Performance requirement Supplemental informationStepnumberReturn

Introduction and Specifications1720/17211-5Table 1- 2: Vector mode (cont.)Characteri sti cStepnumberSupplemental informationPerform ance requirementSu

Introduction and Specifications1-61720/1721Table 1- 3: XY ModeCharacteri sti c Perform ance requirement Supplemental informationStepnumberInput DC Cou

Introduction and Specifications1720/17211-7Table 1- 6: Environmental CharacteristicsCharacteri sti c Supplemental informationTemperatureNon-operatingO

Introduction and Specifications1-81720/1721Table 1- 8: Certifications and Compliances (cont.)Category Standards or descriptionAustralia/New Zeal andDe

Operating Instructions

1720/17212-1Section 2Operating InstructionsThese instructions provide information about the front-panel controls, rear-panelconnectors, the Operator’s

WARRANTYTektroni x wa rrants that this product, that it m anufac tures and sells, will be free from de fects i n materialsand workmanship for a period

Operating Instructions2-21720/1721There are three push-button switches, located in the INP UT block, that have anextra function. The extra function is

Operating Instructions1720/17212-35. BARSA momentary contact push-button switch that toggles between correct gain fordisplaying 75% and 100% amplitude

Operating Instructions2-41720/172112. POWERTurns on and off external power to the 1720/1721. Contains a mechanicalindicator that indicates the status

Operating Instructions1720/17212-5VECTORSCOPEINPUT75 OHM LOOP--THROUGHCH--B EXT REFX Y INPUTAUXILIARY CONTROLINPIXMONOUTCH--A1 23 45768Figure 2-2: 172

Operating Instructions2-61720/17215. EXT REFA bridging loop-through input (compensated for 75Ω) for synchronizing signals.As factory shipped, the inpu

Operating Instructions1720/17212-7switch can be used independently, even though the instrument is in the AUX-ILIARY mode.REF switching allows the 1730

Operating Instructions2-81720/1721OPERATOR’S CHECKOUT PROCEDUREThe following procedure is provided as an aid in obtaining a display on the1720/1721 Ve

Operating Instructions1720/17212-975% Ampl. 0% Setup ---- PALModulated Staircase(Flat F ield, 10 Step)Black Burst Signal(Sync and Burst only)If the XY

Operating Instructions2-101720/17210°10°d∅10°20%dGYL10%dGyl75% 100%100%75%gRVcyMGQbUBmg-- ICYrG10°20°30°40°50°Figure 2-4: 1720/1721 typical vector dis

Operating Instructions1720/17212-110°10°d∅10°20%dGYL10%dGyl75% 100%100%75%gRVcyMGQbUBmg-- ICYrG10°20°30°40°50°Figure 2-5: Modulated staircase waveform

Operating Instructions2-121720/17214. Select InputSelect the Channel B input for a display of the modulated staircase signal. SeeFigure 2-5.Push in an

Operating Instructions1720/17212-131720/1721 (rear)Color bar signalBlack burst75Ω Termination1410--Series (rear)Figure 2-7: Connection for using black

Operating Instructions2-141720/1721

Operating Instructions1720/17212-158. Vari ableWith the test circle displayed, push the VARIABLE push button and check thatthe VARIABLE ON indicator l

Operating Instructions2-161720/1721In color television, the visual sensation of color is described in terms of threequalities: luminance, hue, and sat

Operating Instructions1720/17212-17MAGENTABLUECYANGREENYELLOWREDBLUEMAGENTACYANREDGREENYELLOW45°45°iVFUF*--0.4--0.20.20.40.2--0.2F=U+iVF*=U--iVa-- aFi

Operating Instructions2-181720/17210°10°dᡢ10°20%dGYL10%dGyl75% 100%100%75%WITHOUTSETUPWITHSETUPFigure 2-11: Partial 1720 graticule showing the 75% amp

Operating Instructions1720/17212-19Decoding. To recover the hue information, phase demodulators are employed inthe vectorscope. The phase reference is

Operating Instructions2-201720/1721cyMGQbU10°20°30°40°50°20%2.5 IRE10°10°2.5°20%70.68°60.68°50.68°2.5°Figure 2-13: Fine detail of the 1720 graticule m

Operating Instructions1720/17212-21cyMGQbU10°20°30°40°50°20%5%10°10°70.65°3°20%60.65°50.65°3°Figure 2-14: Fine detail of the 1721 graticule target.On

1720/1721iTable of ContentsTable of Contents i...General Safety Summary viii...

Operating Instructions2-221720/1721MGQBCYGYLR180°U0°V90°--V BURST225°270°+V BURST135°cybmgrylgFigure 2-16: Simulation of a 1721 graticule showing the

Operating Instructions1720/17212-230°10°dᡢ10°20%dGYL10%dGyl75% 100%100%75%WITHOUTSETUPWITHSETUPFigure 2-17: A simulation of a part of the 1720 graticu

Operating Instructions2-241720/17210°10°dᡢ10°20%dGYL10%dGyl75% 100%100%75%75% AMPLITUDEBURST TARGETSFigure 2-18: Simulation of the 1721 Differential G

Operating Instructions1720/17212-25signal at a time and adjusting its gain to correspond to the appropriate axis(horizontal to the X axis and vertical

Operating Instructions2-261720/1721

WarningThe following servicing instructions are for use only by qualified personnel. Toavoid personnel injury, do not perform any servicing other than

1720/1721S-1Service Safety SummaryOnly qualified personnel should perform service procedures. Read this ServiceSafety Summary and the General Safety S

Service Safety SummaryS-21720/1721

Installation

Table of Contentsii1720/1721Power Sourc e 3--1...Mains Frequency and Voltage Ranges 3--1...

1720/17213-1Section 3InstallationThe shipping carton and pads provide protection for the instrument duringtransit, they should be retained in case sub

Installation3-21720/172111A3 Main BdJ696 Ext sync sourceJ796 Subcarrier refJ921 X High gainJ920 Y High gainJ245 Blanking disableFrontFigure 3-1: Plug

Installation1720/17213-3123456789101112131415GNDGNDGNDGNDGNDGNDNotUsed+YInput-- YInput+YInput-- YInput-- YInput+YHigh gaininput-- YInput+YHigh gaininp

Installation3-41720/172112345GroundTXD RXD Externalstrobe out6789GroundFigure 3-3: View of the 1720/1721 rear panel showing AUXILIARY connector pinswi

Installation1720/17213-56.13012.7251.06016.1800.156 Dia (4)RearBottom Side6.8758.2500.6885.105Figure 3-4: 1700F00 plain cabinet.

Installation3-61720/1721

Installation1720/17213-7Cabinet Securing ScrewsFigure 3-6: Cabinet securing screws.The optional 1700F05 side-by-side rack adapter, shown in F igure 3-

Installation3-81720/1721Handle bracket is attachedat this setting when shipped.To mount 528A and 1420-Series.To mount 1700-Series half-rackinstruments

Installation1720/17213-9For applications such as consoles, the instrument can be mounted with frontmolding flush or protruding from the console. In bo

Table of Contents1720/1721iiiMicroprocessor 4--15...DIAGRAM 6 CONTROL CIRCUIT 4--17...

Installation3-101720/1721

Theory of Operation

1720/17214-1Section 4Theory of OperationThe material in this section is subdivided into general description, which issupported by the main block diagr

Theory of Operation4-21720/1721other line so that the +V and --V signals can be overlaid for phase matchingapplications.The regenerated subcarrier, us

Theory of Operation1720/17214-3front-panel indicators are driven by the Microprocessor so that they will mirrorthe current measurement criteria.CH ACH

Theory of Operation4-41720/1721the Quad Phase Detector is delayed by 90°. The chrominance signal is comparedto the regenerated subcarrier from the VCX

Theory of Operation1720/17214-5Circuit DescriptionsThe following descriptions are divided by diagram number and then furthersubdivided by logical circ

Theory of Operation4-61720/1721junction of a differential amplifier (Q293 and Q292) that drives the OutputAmplifier (Q192). The feedback resistor that

Theory of Operation1720/17214-7BurstdemodPhasecontrolBurstgatePhasedetectorLoop filterSubcarrieroscillatorBurst refVCOBurst ampFigure 4-2: Block diagr

Table of Contentsiv1720/1721Bezel Removal 6--16...Graticule Light Removal and Replacement 6--17...

Theory of Operation4-81720/1721The reference signal is ac-coupled through a tuned circuit, C791 and L791, todrive the Chroma Amplifier, Q794 and Q795.

Theory of Operation1720/17214-9Reference Amplifier. The output of this phase detector is an ac multiplication ofthe input signals, which occurs only d

Theory of Operation4-101720/1721The Subcarrier Regenerator in the 1721 Vectorscope samples alternate lines andlocks to every other burst. Alternate li

Theory of Operation1720/17214-11DIAGRAM 3 DEMODULATORCHROMAFSCR-Y(V)B-Y(U)BandpassfilterSyc tipchromaclampHorizpositionclampLowpassfilterQuadphaseVAxi

Theory of Operation4-121720/1721U774B (on Diagram 2), which has identified the +V lines (for PAL) in theSubcarrier Regenerator.The flip-flop outputs d

Theory of Operation1720/17214-13The B--Y Demodulator output is also fed back through R763 to a clamp circuitconsisting of U757 and Q761. U757 is an op

Theory of Operation4-141720/1721U942 is a Quad Operational Amplifier. U942A and B are Balanced DifferentialInput Amplifiers, intended for audio use. I

Theory of Operation1720/17214-15DIAGRAM 5 MICROPROCESSORFront panelcontrolsAuxiliary control inBufferMicroprocessorReadout driveAddressDemuxI/O Datasw

Theory of Operation4-161720/1721control lines (75%, 100%, and Variable) for instrument switching functions.Other switching control lines are output di

Theory of Operation1720/17214-173. In Auxiliary, when a Store or Recall is requested from the companion1730-Series.U505 is the Power Down Detection ci

Table of Contents1720/1721vList of FiguresFigure 2-1: Control and indicator locations. 2--1...Figure 2-2: 1720/1721

Theory of Operation4-181720/1721In Line Select mode (which requires an external blanking pulse, input throughthe Auxiliary connector, from a 1730-Seri

Theory of Operation1720/17214-19DIAGRAM 7 LOW VOLTAGE POWER SUPPLY+5VLinerectifierand filterPulse widthmodulatorKickstarterVoltagesnubberBase driveand

Theory of Operation4-201720/1721+----+From peak detectorR8310.0KR8424.9KR7949.9KR10149.92RR+2.5VR960.51Q9LatchR8722.1Simplified pulse wi dth modulator

Theory of Operation1720/17214-21The Error Amplifier regulates the +5 V output by feeding an error signal to thePulse Width Modulator. VR1 is a 2.5 V s

Theory of Operation4-221720/1721DIAGRAM 8 HIGH VOLTAGE POWER SUPPLYCRT4X MultiplierOSCErrorFocus <6>Z-Axis <6>The High Voltage Power Suppl

Theory of Operation1720/17214-23Q1 and Q2 form an operational amplifier that sets the voltage at the bottom ofthe focus divider. The front-panel FOCUS

Theory of Operation4-241720/1721pull-down transistor. C6 speeds up the amplifier by coupling ac signals to thebase of Q3. CR2 and R41 protect the ampl

Checks and Adjustments

1720/17215-1Section 5Checks and AdjustmentsChecks and adjustments are two separate procedures. The first, a PerformanceCheck, is used to determine com