Tektronix Sleep Apnea Machine 070-5992-05 Manual de usuario

Instruction Manual760A/760D/760NStereo Audio Monitors(760A S/N B050000 & Above)(760D/760N S/N B030000 & Above)070-5992-05WarningThe servicing

Contentsvi760A / 760D / 760N

Theory of Operation6–12760A / 760D / 760N

Options

760A / 760D / 760N7–1Section 7OptionsThis section describes instrument options available for the 760–Series.OPTIONSThe standard instrument is shipped

Options7–2760A / 760D / 760N

Replaceable Electrical Parts

760A / 760D / 760N8–1Section 8Replaceable Electrical PartsThis section contains a list of the electrical components for the 760A, 760D, and760N. Use t

Replaceable Electrical Parts8–2760A / 760D / 760NParts List Column Descriptions Column Column Name Description1 Component number The component number

Replaceable Electrical Parts760A / 760D / 760N8–3Manufacturers Cross Index Mfr.CodeManufacturer Address City, State, Zip CodeD5243 ROEDERSTEIN ERNST G

760A / 760D / 760NviiGeneral Safety SummaryReview the following safety precautions to avoid injury and prevent damage tothis product or any products c

Replaceable Electrical Parts8–4760A / 760D / 760NManufacturers Cross Index (Cont.)Mfr.CodeCity, State, Zip CodeAddressManufacturer11236 CTS CORPORATIO

Replaceable Electrical Parts760A / 760D / 760N8–5Manufacturers Cross Index (Cont.)Mfr.CodeCity, State, Zip CodeAddressManufacturer37942 NORTH AMERICAN

Replaceable Electrical Parts8–6760A / 760D / 760NReplaceable Electrical Parts List ComponentNumberTektronixPart NumberSerial no.effectiveSerial No.Dis

Replaceable Electrical Parts760A / 760D / 760N8–7Replaceable Electrical Parts List (Cont.)ComponentNumberMfr. Part NumberMfr.CodeName & Descriptio

Replaceable Electrical Parts8–8760A / 760D / 760NReplaceable Electrical Parts List (Cont.)ComponentNumberMfr. Part NumberMfr.CodeName & Descriptio

Replaceable Electrical Parts760A / 760D / 760N8–9Replaceable Electrical Parts List (Cont.)ComponentNumberMfr. Part NumberMfr.CodeName & Descriptio

Replaceable Electrical Parts8–10760A / 760D / 760NReplaceable Electrical Parts List (Cont.)ComponentNumberMfr. Part NumberMfr.CodeName & Descripti

Replaceable Electrical Parts760A / 760D / 760N8–11Replaceable Electrical Parts List (Cont.)ComponentNumberMfr. Part NumberMfr.CodeName & Descripti

Replaceable Electrical Parts8–12760A / 760D / 760NReplaceable Electrical Parts List (Cont.)ComponentNumberMfr. Part NumberMfr.CodeName & Descripti

Replaceable Electrical Parts760A / 760D / 760N8–13Replaceable Electrical Parts List (Cont.)ComponentNumberMfr. Part NumberMfr.CodeName & Descripti

General Safety Summaryviii760A / 760D / 760NDANGER indicates an injury hazard immediately accessible as you read themarking.WARNING indicates an injur

Replaceable Electrical Parts8–14760A / 760D / 760NReplaceable Electrical Parts List (Cont.)ComponentNumberMfr. Part NumberMfr.CodeName & Descripti

Replaceable Electrical Parts760A / 760D / 760N8–15Replaceable Electrical Parts List (Cont.)ComponentNumberMfr. Part NumberMfr.CodeName & Descripti

Replaceable Electrical Parts8–16760A / 760D / 760NReplaceable Electrical Parts List (Cont.)ComponentNumberMfr. Part NumberMfr.CodeName & Descripti

Replaceable Electrical Parts760A / 760D / 760N8–17Replaceable Electrical Parts List (Cont.)ComponentNumberMfr. Part NumberMfr.CodeName & Descripti

Replaceable Electrical Parts8–18760A / 760D / 760NReplaceable Electrical Parts List (Cont.)ComponentNumberMfr. Part NumberMfr.CodeName & Descripti

Replaceable Electrical Parts760A / 760D / 760N8–19Replaceable Electrical Parts List (Cont.)ComponentNumberMfr. Part NumberMfr.CodeName & Descripti

Replaceable Electrical Parts8–20760A / 760D / 760NReplaceable Electrical Parts List (Cont.)ComponentNumberMfr. Part NumberMfr.CodeName & Descripti

Replaceable Electrical Parts760A / 760D / 760N8–21Replaceable Electrical Parts List (Cont.)ComponentNumberMfr. Part NumberMfr.CodeName & Descripti

Replaceable Electrical Parts8–22760A / 760D / 760NReplaceable Electrical Parts List (Cont.)ComponentNumberMfr. Part NumberMfr.CodeName & Descripti

Replaceable Electrical Parts760A / 760D / 760N8–23Replaceable Electrical Parts List (Cont.)ComponentNumberMfr. Part NumberMfr.CodeName & Descripti

760A / 760D / 760NixService Safety SummaryOnly qualified personnel should perform service procedures. Read this ServiceSafety Summary and the General

Replaceable Electrical Parts8–24760A / 760D / 760NReplaceable Electrical Parts List (Cont.)ComponentNumberMfr. Part NumberMfr.CodeName & Descripti

Replaceable Electrical Parts760A / 760D / 760N8–25Replaceable Electrical Parts List (Cont.)ComponentNumberMfr. Part NumberMfr.CodeName & Descripti

Replaceable Electrical Parts8–26760A / 760D / 760NReplaceable Electrical Parts List (Cont.)ComponentNumberMfr. Part NumberMfr.CodeName & Descripti

Replaceable Electrical Parts760A / 760D / 760N8–27Replaceable Electrical Parts List (Cont.)ComponentNumberMfr. Part NumberMfr.CodeName & Descripti

Replaceable Electrical Parts8–28760A / 760D / 760NReplaceable Electrical Parts List (Cont.)ComponentNumberMfr. Part NumberMfr.CodeName & Descripti

Replaceable Electrical Parts760A / 760D / 760N8–29Replaceable Electrical Parts List (Cont.)ComponentNumberMfr. Part NumberMfr.CodeName & Descripti

Replaceable Electrical Parts8–30760A / 760D / 760NReplaceable Electrical Parts List (Cont.)ComponentNumberMfr. Part NumberMfr.CodeName & Descripti

Replaceable Electrical Parts760A / 760D / 760N8–31Replaceable Electrical Parts List (Cont.)ComponentNumberMfr. Part NumberMfr.CodeName & Descripti

Replaceable Electrical Parts8–32760A / 760D / 760NReplaceable Electrical Parts List (Cont.)ComponentNumberMfr. Part NumberMfr.CodeName & Descripti

Diagrams/Circuit BoardIllustrations

Service Safety Summaryx760A / 760D / 760N

9–1760A / 760D / 760NSection 9Diagrams/Circuit Board IllustrationsSymbolsGraphic symbols and class designation letters are based on ANSI StandardY32.2

Diagrams/Circuit Board Illustrations9–2760A / 760D / 760NThe following information and special symbols may appear in this manual.Assembly NumbersEach

C125 1 G3C127 1 G3C132 1 G3C145 1 H3C148 1 G2C149 3 G4C165 4 G3C172 1 G2C179 1 G2C187 1 C2C190 1 B2C206 2 H1C211 1 H3C215 3 H1C251 3 G5C254 1 F5C255 1

Assembly A3 Schematic Diagram <1> Component Locator Chart             

!!!%!! $$!!!&# !!

C206 H1C349 A1C448 C1C536 D4C543 D1C546 B1C547 C1C548 A4C649 C4C650 C4C724 B3C725 A3C746 B4CR442 B1CR443 B1CR536 E1CR542 B1CR543 B1CR545 B1CR546 B1CR6

1MC34084MC34084MC34084 4L8L9L10A0 15O0 1O1 2O2 3O3 4O4 5O5 6O6 7O7 9O810O911A2 13A1 14A3 12U30874LS42I0 1I1 2I2 3I3 4I4 5I5 6I6 7I7 8O018O117

Schematic Diagram <3> Component Locator Chart              Asse

AU[3..10]AU[3..10]H42A0 15O0 1O1 2O2 3O3 4O4 5O5 6O6 7O7 9O810O911A2 13A1 14A3 12U31774LS42I0 1I1 2I2 3I3 4I4 5I5 6I6 7I7 8O018O117O216O315O41

760A / 760D / 760NxiPrefaceThis manual documents the TEKTRONIX 760A/760D/760N Stereo AudioMonitor and is intended for instrument operators and service

Schematic Diagram <4> Component Locator Chart              Asse

PEAKHOLDSELECT_BARR8561.00MA13SUM_ENABLEAUX_ENABLE 1 2 3 16 15 14 9 10 11 8 7 6 13 5 4U172DG201AUXE11B15VAGC2 - 3 L+R1 - 2 -L45 DEGREEMATRIX

C510 E3C570 C4C573 B5C574 B4C575 A4C578 A4C581 A1C584 B1C586 A1C587 B2C588 C1C616 D3C618 D3C695 D1C712 C3C768 D4C772 B4C776 G3C778 F4C785 B1C870 E4C87

VERTICAL OUTPUT AMPLIFIER%!!!$)#%#$!!!$##!#!##!

A1 Power Supply BoardStatic Sensitive DevicesSee Maintenance SectionC1 7 C4 A4C2 7 D3 D1C3 7 D3 A2C4 7 D3 A2C5 7 D4 B3C6 7 C4 B4C7 7 F3 B1C8 7 D3 B2C9

760A/760D/760N STEREO AUDIO MONITOR LOW VOLTS POWER SUPPLY 61 12 23 34 45 56 67 78 89 910 1011 11J5CAUTION: ALL CIRCUITRY TO THEMOUNTINGLINE

C1 C4 A4C2 D3 D1C3 D3 A2C4 D3 A2C5 D4 B3C6 C4 B4C7 F3 B1C8 D3 B2C9 E2 B2C10 C5 B4C11 E2 B1C12 D2 C4C13 D2 C4C14 D2 C4C15 F2 C4C16 C2 C3C17 F2 D4C18 F3

760A/760D/760N STEREO AUDIO MONITOR HIGH VOLTS POWER SUPPLY 76665P320 IS PARTOF CRTV1R6122.1+100VC1910UFC2410UFC3410UFHV OSC &ERROR AMPC27 2 3 6

R437 G1R438 F1R439 G2R451 G1S516 F4S525 G3S534 G2S544A G1S544B G1U320 C1U332 C3U347 C4Schematic Diagram <8> Component Locator Chart 

"

Prefacexii760A / 760D / 760NSection 6, Theory of Operation, provides an overall block diagram and detailedcircuit descriptions. The detailed circuit

Replaceable Mechanical Parts

760A / 760D / 760N10–1Section 10Replaceable Mechanical PartsThis section contains a list of the replaceable mechanical components for the760A, 760D, a

Replaceable Mechanical Parts10–2760A / 760D / 760NParts List Column DescriptionsColumn Column Name Description1 Figure & index number Items in thi

Replaceable Mechanical Parts760A / 760D / 760N10–3Manufacturers Cross Index Mfr.CodeManufacturer Address City, State, Zip CodeS3109 FELLER U.S. CORPOR

Replaceable Mechanical Parts10–4760A / 760D / 760NReplaceable mechanical parts list Fig. &IndexNumberTektronixPart NumberSerial No.EffectiveSerial

Replaceable Mechanical Parts760A / 760D / 760N10–5Replaceable mechanical parts list (Cont.)Fig. &IndexNumberMfr. Part NumberMfr.CodeName & Des

Replaceable Mechanical Parts10–6760A / 760D / 760NReplaceable mechanical parts list (Cont.)Fig. &IndexNumberMfr. Part NumberMfr.CodeName & Des

760A/760D/760NFIG. 1 EXPLODED VIEWA2A3A1A10

Introduction andSpecifications

760A / 760D / 760N1–1Section 1Introduction and SpecificationsIntroductionThe 760A Stereo Audio Monitor is a simple yet accurate tool that the audioeng

Copyright © Tektronix, Inc. All rights reserved.Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this pu

Introduction and Specifications1–2760A / 760D / 760NThe display is set for a “Sound Stage” orientation when the 760A is shippedfrom the factory. This

Introduction and Specifications760A / 760D / 760N1–3Table 1–1: Response Time Inst Tone Burst (mS) Response (dB)760A100.0 0 "0.510.0 2 "0.55.

Introduction and Specifications1–4760A / 760D / 760NSpecificationsThe Performance Requirements listed in Table 13 are warranted over an ambienttempera

Introduction and Specifications760A / 760D / 760N1–5Table 1–3: Electrical Characteristics (Cont.)CharacteristicPerf CheckStep No.Supplemental Informat

Introduction and Specifications1–6760A / 760D / 760NTable 1–4: Environmental Limits Characteristic Supplemental InformationTemperatureStored –55° C to

Introduction and Specifications760A / 760D / 760N1–7Table 1–6: Certifications and Compliances EC Declaration of Conformity – EMC 1Meets intent of Dire

Introduction and Specifications1–8760A / 760D / 760N

Operating Instructions

760A / 760D / 760N2–1Section 2Operating InstructionsIntroductionThis section of the manual will familiarize you with the 760A Stereo AudioMonitor’s op

WARRANTYTektronix warrants that this product will be free from defects in materials and workmanship for a period of one (1) year fromthe date of shipm

Operating Instructions2–2760A / 760D / 760NPOSITIONFOCUSTRACEROTGRATICULEINTENSITYHORIZVERTFigure 2–1: 760A Front PanelRear–Panel ConnectorsThe three

Operating Instructions760A / 760D / 760N2–3FUSE333–3321–02SALEFTRIGHTAUXILIARYDIE IN DIESEM GERAT ENTSTEHENDERONTGENSTRAHLUNG IST AUSREICHEND ABGESCHI

Operating Instructions2–4760A / 760D / 760NThe graticule provides calibrated reference marks for a variety of uses. Bothgraticule options have the sa

Operating Instructions760A / 760D / 760N2–5L indicates signal amplitude from the LEFT channel input.R indicates signal amplitude from the RIGHT channe

Operating Instructions2–6760A / 760D / 760N760N The 760N uses a scale in accordance with Technical Recommendation N9of the Nordic broadcast authoritie

Operating Instructions760A / 760D / 760N2–7760A When a ppm such as the 760A is used in conjunction with vu meters. it isimportant to consider the diff

Operating Instructions2–8760A / 760D / 760NFigure 2–5: Ellipse with approximately 13° phase errorIf the ellipse closes to a single line, the LEFT and

Operating Instructions760A / 760D / 760N2–9Figure 2–7: Well balanced stereoTransmitting a mono–compatible stereo television signal is, and will remain

Operating Instructions2–10760A / 760D / 760Nwave into both channels of the system and checking outputs stage by stage, thesource of the phase reversal

The following servicing instructions are for use only by qualified personnel. Toavoid injury, do not perform any servicing other than that stated in t

Installation

760A / 760D / 760N3–1Section 3InstallationAt installation time, save the shipping carton and packaging materials forrepackaging in case shipment becom

Installation3–2760A / 760D / 760NTo enable the 760A bar graph to indicate 0 dB with an input of 0, +4, +8, +12, or+16 dBm, move the jumpers on J185 (L

Installation760A / 760D / 760N3–3graticule supplied with the instrument. Detailed instructions for removing thebezel can be found under the Mechanica

Installation3–4760A / 760D / 760N

Maintenance

760A / 760D / 760N4–1Section 4MaintenanceThis section discusses preventive maintenance, general troubleshootinginformation, and corrective maintenance

760A / 760D / 760NiTable of ContentsList of Figures iv. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . List

Maintenance4–2760A / 760D / 760NCAUTION. Do not allow water to get inside any enclosed assembly or component.Do not clean any plastic materials with o

Maintenance760A / 760D / 760N4–3CIRCUIT BOARDILLUSTRATIONSPARTS LOCATINGCHARTSCHEMATICTHEORY OF OPERATION ORADJUSTMENT PROCEDURESCHEMATICFigure 4–1: U

Maintenance4–4760A / 760D / 760NReplaceable Electrical Parts List. The Replaceable Electrical Parts List isarranged in assembly–by–assembly order, a

Maintenance760A / 760D / 760N4–5NOTE. The parts lists in this manual should be used when ordering replacementparts.Replacement parts are available fro

Maintenance4–6760A / 760D / 760NPosition 3 a step function used to check DAC linearity and bit transition glitches.The first nine addresses are one–b

Maintenance760A / 760D / 760N4–7PIN 18 DELAY makes a low–to–high transition when the current signal valueis ≥ the stored peak value. This clocks the

Maintenance4–8760A / 760D / 760NTable 4–1: Power Supply Fault Symptoms Symptom ProcedureLine fuse open Rectifier/Switcher Check (Low Volts)Power supp

Maintenance760A / 760D / 760N4–9CAUTION. Do not proceed until the the drain of Q9 is near 0 V. Dangerousvoltage potentials are present in the circuit

Maintenance4–10760A / 760D / 760Nb. Table 4–3 lists the signal present in a properly functioning controlcircuit.Table 4–3: Control Circuit Test Points

Maintenance760A / 760D / 760N4–11Load the Low Volts Supply with the instrument, or with the 20 W resistor asstated at the beginning of the Troubleshoo

Contentsii760A / 760D / 760NMaintenanceSection 4 Maintenance 4–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Introduc

Maintenance4–12760A / 760D / 760NH Using the digital multimeter, measure the voltage between TP1 and thecathode of CR5. It should vary between approx

Maintenance760A / 760D / 760N4–13MECHANICAL DISASSEMBLY AND ASSEMBLYBefore removing parts from the 760A, disconnect the power cord and thenremove the

Maintenance4–14760A / 760D / 760N2. Grasping the bottom of the bezel, pull out and upward. The bezel has twohinges that hold the top in place that ne

Maintenance760A / 760D / 760N4–152. Slip the CRT part way back into position and feed the trace rotation wires(and plug) back through the hole in the

Maintenance4–16760A / 760D / 760Nb. Remove the four screws from the rear.c. The board may now be separated from the front panel and the compo-nents sh

Maintenance760A / 760D / 760N4–17REARA1 Power Supply board retaining screwsA3 Main board retaining screwsFRONTJ1J3J2 J4Ground strapFigure 4–4: Retai

Maintenance4–18760A / 760D / 760N7. Remove the board by sliding it forward and lifting it up.8. To replace the board, reverse this procedure.REPACKAGI

Maintenance760A / 760D / 760N4–19For best results, save and reuse the package in which your instrument wasshipped. If the original package is unfit f

Maintenance4–20760A / 760D / 760N

Performance Check and Calibration

Contents760A / 760D / 760NiiiDAC 6–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . LOW VOLTAG

760A / 760D / 760N5–1Section 5Performance Check and Calibration ProceduresThis section of the manual consists of two procedures. The Performance Chec

Performance Check and Calibration Procedures5–2760A / 760D / 760NPerformance Check Procedure1. Initial AlignmentNOTE. This step must be performed prio

Performance Check and Calibration Procedures760A / 760D / 760N5–3b. Connect the 760–series AC power cord to the variable autotransformer.Turn power on

Performance Check and Calibration Procedures5–4760A / 760D / 760Nc. Return the autotransformer to the local nominal mains voltage.3. Check Input Termi

Performance Check and Calibration Procedures760A / 760D / 760N5–5Check the RIGHT and AUXILIARY bars in the same manner, connect-ing the input signal t

Performance Check and Calibration Procedures5–6760A / 760D / 760Nd. CHECK – that the trace ends within one–half division of the centeramplitude mark o

Performance Check and Calibration Procedures760A / 760D / 760N5–7d. Move the leveled audio signal generator output from the RIGHT to theLEFT AUDIO INP

Performance Check and Calibration Procedures5–8760A / 760D / 760N760N: "5 bar segmentsd. Set S340 to Position 7 (expanded scale with offset).e.

Performance Check and Calibration Procedures760A / 760D / 760N5–914. Check Bar Crosstalka. Connect the leveled audio signal generator output to the LE

Contentsiv760A / 760D / 760NList of FiguresFigure 1–1: LED Bar Graph scales for the 760A, 760D, and 760N 1–1. . . . . Figure 2–1: 760A Front Panel 2–2

Performance Check and Calibration Procedures5–10760A / 760D / 760N16. Check Dynamic Response (760A only)Attack Timea. Set S340 to position 6, and turn

Performance Check and Calibration Procedures760A / 760D / 760N5–11Calibration Procedure1. Preliminary Set UpNOTE. Unless otherwise stated, always set

Performance Check and Calibration Procedures5–12760A / 760D / 760NR759CAUTIONMAINSVOLTAGEA1 PWR SPLY BDR11R45R49R58W1 +5VCRTBIASASTIGGEOMFOCUSW4 –15

Performance Check and Calibration Procedures760A / 760D / 760N5–13f. CHECK – that the crt is blanked out while there is no signal applied.5. Adjust Ge

Performance Check and Calibration Procedures5–14760A / 760D / 760Nc. ADJUST – R463 (Orthogonality) on the A3 Main board, to align thetrace with the do

Performance Check and Calibration Procedures760A / 760D / 760N5–15e. Set the audio signal generator frequency to 20 Hz.f. CHECK – that the display sho

Performance Check and Calibration Procedures5–16760A / 760D / 760N

Theory of Operation

760A / 760D / 760N6–1Section 6Theory of OperationINTRODUCTIONThis section is intended to give a thorough understanding of the 760A / 760D /760N Stereo

Contents760A / 760D / 760NvList of TablesTable 1–1: Response Time 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 1–

Theory of Operation6–2760A / 760D / 760N45° Matrix. The Left and Right signals are added in U179 and subtracted inU379 to produce L+R and L–R signal

Theory of Operation760A / 760D / 760N6–3Trace Rotation. A dc current through the trace rotation coil magnetically correctsrotation.Gain Control Logic.

Theory of Operation6–4760A / 760D / 760NComparatorFilter &RectifierDecoder /DriverLED BarDACROM LookupTableCounterClockDAC RampInputSignal–+Figure

Theory of Operation760A / 760D / 760N6–5Peak Hold Circuit. The Peak Hold circuit is entirely digital. It stores peak valuesas follows. On each scan

Theory of Operation6–6760A / 760D / 760NU818 provides approximately 30 kHz clocking for the counter. Its output is asquare wave whose rising edge def

Theory of Operation760A / 760D / 760N6–7The Low Voltage Power Supply is called a Flyback Switcher. When switchermosfet Q9 is turned on, its drain vol

Theory of Operation6–8760A / 760D / 760NU5 pin 2 is the inverting input of an internal op-amp. The noninverting input isset to 2.5 V by an internal v

Theory of Operation760A / 760D / 760N6–9within 50 ms of power up, U3B will shut down the switcher. The power supplywill then cycle on and off every c

Theory of Operation6–10760A / 760D / 760NCR4 is the high voltage rectifier. Filter capacitors C3, C4, and C8 work withCR4 to provide –2530 V to the C

Theory of Operation760A / 760D / 760N6–11pull-down transistor. C6 speeds up the amplifier by coupling AC signals to thebase of Q3. CR2 and R41 prote