Horizontal Circuit Analyzing

Transcription

1 THE HA2500 Horizonta Circuit Anayzing Rea Answers - Rea Profits - Rea Fast! HA2500 Universa Horizonta Anayzer

2 Why A Universa Horizonta Anayzer For Your Business? Today s CRT video dispay monitors support computer, medica, security, design, and industria appications, to name a few. They operate at many different horizonta scanning frequencies and picture resoutions. Pus, a video dispay monitors have horizonta stages to produce CRT high votage and horizonta yoke current. Reduce The Number Of Damaged Horizonta Outputs... Horizonta and reated stages account for many computer monitor faiures and cause the most difficut-to-troubeshoot symptoms. Many symptoms are difficut to troubeshoot because the horizonta stages interact so cosey with other circuits such as the switch mode power suppy X-ray shutdown, high votage/defection reguator, and mode contro circuits. It is not uncommon to repace burnt components, then see them overheat or burn out again from the remaining defects when AC power is appied. You may have measured ow votages or momentaryony votages on a meter or scope teing you itte about where to ook for the probem. And, you've probaby repaced components ony to discover you havethe same unusua symptoms such as distorted or insufficient horizonta defection, interference in the CRT picture, or noise radiating from the fyback transformer. Most horizonta reated defects cannot be isoated with a DVM and scope measurements or with troubeshooting methods used effectivey by technicians in the past. This frustrates technicians and disappoints service managers or owners who see time and components being invested without return. The new Sencore HA2500 Universa Horizonta Anayzer provides excusive anayzing tests and substitution capabiities to ocaize switch mode power suppy oading and defects among horizonta output, horizonta driver, X-ray shutdown, high votage/defection reguators, and other horizonta reated stages. Now you can confidenty isoate horizonta defects in computer monitors in a fraction of the time it takes using conventiona tests, pus you can reduce repacement parts costs too!

3 Now Everything You Need To Estimate Repair Costs And Locaize Horizonta Stage Defects In Computer Monitors Less Time And More Profitaby Than Ever Before! Unique frequency ock and variabe horizonta frequency aows you to quicky service a horizonta circuits - no matter the frequency Excusive Horizonta Output Load Test makes setup and testingasnapeven without appying AC power for more accurate estimates, fewer damaged repacement parts, and faster diagnosis and repair Patented Ringer Test proves the condition of fybacks and yokes in seconds - even a singe shorted turn Excusive Dynamic Tests hep you anayze the horizonta circuit in a powered-up condition to catch even subte defects in the power suppy and drive signa Variabe-current imited & protected B+ substitute power suppy permits testing of horizonta stages even when the power suppy is dead Portabe and fied rugged to go on ocation when bringing the defective product to your bench isn t feasibe Ca SENCORE Today!, ( ) SENCORE 3

4 Unique Frequency Lock And Variabe Horizonta Frequency The HA2500 contains a unique frequency generator with two modes of operation. First you can simpy adjust the coarse and fine contros to the horizonta circuit s highest operating frequency for stand-aone operation. Or, the horizonta anayzing capabiities of the HA2 500 can be teamed up with a video or RGB generator. The HA2500's Est. Sync Input enabes it to produce a horizonta test signa at the same horizonta frequency and phase as a video or RGB test signa generator. This saves time and reduces the chance of using an improper horizonta test frequency when troubeshooting. With the video or RGB generator appied to the input of a functioning video dispay, a visibe and stationary video test pattern is produced on the CRT when subbing in the horizonta circuit. This permits anayzing of the high votage, signa processing, defection, mode contro, CRT, and other major circuits of the video dispay. The HA2500 is designed to sync to most Sencore Computer Monitor Anayzers or Signa Generators incuding the Sencore CM2000, CM2125, and CM125 to provide comprehensive testing and troubeshooting of computer monitors. 4 S E N C O R E

5 Patented Load Test Isoates Horizonta Output Defects With The Chassis "Off" commony oad or damage the switch mode power suppy or cause startup and shutdown symptoms. Many monitor defects start with a dead power suppy or burnt or shorted components in the SMPS or horizonta reated stages. To get started troubeshooting means you have to repace the damaged components or insta a parts or upgrade kit. When hidden probems are missed by resistance or component tests, the repacement components heat up or burn out quicky when AC votage is appied. Your investment of time and component costs are ost. The HA2500's Load Test is designed to isoate horizonta defects which prevent chassis on troubeshooting. The Load Test functionay tests the horizonta output stage with no ACV to the chassis. It isoates horizonta output stage timing and oading defects that cannot be found with resistance and component tests. These defects If the chassis horizonta output stage contains a defect, the Load Test accuratey reproduces the fauty horizonta output stage operation. Since the Load Test operates at reduced votage eves, it can be appied for ong durations into probem horizonta output stages without component or instrument damage. This test aone wi reduce your estimating time, save you from damaging repacement components, and add profit back directy into your business. When to Use the Load Tests Fu AC vots cannot be appied without component damage B + suppy is dead or bad Horiz. output dead or suspect H.0.T heats or fas Dispay dead or won t start B + suppy squeas, burns-up components or bows fuses X-ray shutdown symptom Estimating repair costs What It Tes You If horiz. output stage function is norma or abnorma If short or high current oad exists on B + power suppy If horiz. output stage puse timing is norma or abnorma If horiz. output stage is efficient or inefficient (high osses) The HA2500 Automaticay Measures: ma = current being drawn by the horizonta output stage % EFF = percent of energy to the horiz. output returned to the B+ µs = readings of the LC timing of S E N C O R E 5

6 Patented Ringer Proves The Condition Of Fybacks, Yokes, And Cois In Seconds The Ringer Test is used to isoate a shorted turn within fybacks, yokes, or cois when the Load Test indicates a horizonta output stage defect. A shorted turn or turns greaty aters the component s function and circuit s operation, but does not change the winding s resistance or its inductance when you measure it. The HA2500 Ringer Test quicky confirms a shorted turn defect saving you from repacing a good fyback, yoke, or horizonta coi; or worst yet, mistakeny concuding it s defective and osing the repair and revenue opportunity. The Ringer Test may be used effectivey to isoate shorted turns among other cois and transformers abundant in today s muti-frequency CRT dispays. Cois in the B+ votage path commony deveop shorted turns when a horizonta output stage defect produces high current through them. The Ringer Test quicky identifies when these cois have been damaged and need to be repaced. Ca SENCORE, Today! ( ) 6 SENCORE

7 Dynamic Tests Anayze The Horizonta Output Stage With Automatic Measurements The HA2500's Dynamic Tests METER provides automatic measurementsof votages and waveforms to quicky anayze the horizonta output stage without compicated setup, probing mutipe circuit points, seecting mutipe test functions, or worry of test equipment damage. Measurements confirm norma or abnorma horizonta output stage operation and guide you to suspect stages or defects in either bipoar or MOSFET type horizonta output transistor stages. The Coector Or Drain Meter provides three automatic chassis on measurements of votages and waveforms produced by the horizonta output stage at the coector or drain of the horizonta output transistor. These measurements incude the DC votage, the fyback puse peak-to-peak votage, and the fyback puse duration or time in microseconds. The BASE OR GATE Meter provides two automatic measurements of the drive waveform at the base or gate of the horizonta output transistor. SENCORE 7

8 UNIVERSAL HORIZONTAL ANALYZER New Fuorescent Dispay: Now you can ceary view a measurements - even in ow ight conditions Simpified Dispay Seect: Aows you to switch easiy between Load and Dynamic Tests Excusive Substitute B+ Suppy: Variabe vots, so now you can take contro and substitute for the B+ power suppy Universa Horizonta Frequency: Two modes of operation (interna generator or externay synched to a generator) aow the HA2500 to anayze a circuits from 15 khz to 125 khz. Power Limit: Provides power imiting for substitute B+ suppy to protect the circuit and components Patent Pending Load And Ringer Tests: These tests wi hep ocaize horizonta circuit defects - with the chassis turned off Patented With Other Patents Pending -A Sencore Excusive - Ca 1-8OO-SENCORE, Today! 8 SENCORE ( ) Dynamic Tests METER : Performs automatic "chassis Dynamic Tests DRIVE : Substitutes on measurements through 3 ead hook-up to the hori- horizonta drive to base or gate of zonta output transistor to anayze the horizonta output horizonta output transistor to test stages for defective horizonta drive and B+ votages Horiz. output and isoate drive defects Horizonta Driver Test: Measures current output of horizonta driver stage to detect weak or intermittent horizonta drive SENCORE 9

9 Excusive Horiz. Driver Test Detects Weak Or Intermittent Horizonta Base Drive Horizonta output stage symptoms and component faiures are often caused by defects in the horizonta drive stage. Yet, the driver stage is sedom suspected and often when it does have a defect, scope waveforms and peak-to-peak measurements at the base of the horizonta output transistor appear norma. Horizonta driver stage defects and symptoms are difficut to diagnose for severa reasons. 1. The symptoms are the same as horizonta output stage defects. 2. Horizonta output transistors may burn-out quicky eaving no time for measurements. 3. Horizonta output transistors may run hotter than norma and burn-out after severa minutes, hours, or days whie waveforms and horizonta output stage functions appear norma. The HA2500's Horiz. Driver Test is an excusive anayzing test designed to identify horizonta driver stage defects. The Horiz. Driver Test anayzes horizonta driver stages that produce base drive for bipoar horizonta output transistors. The test identifies horizonta driver stages which are not producing an adequate current drive for proper operation of a bipoar type horizonta output transistor. By isoating horizonta driver stage defects with the HA2500, you prevent wasted time troubeshooting the horizonta output stage, save money repacing repeat horizonta output transistor faiures and make revenue from monitors with inexpensive drive stage probems you may have missed before. 10 Ca -800-SENCORE, Today! ( ) S E N C O R E

10 H.O.T. Base Or Gate Sub Drive Enabes Horizonta Output Stage Anayzing Horizonta drive defects can cause the horizonta output stage to be dead or appear defective. Symptoms incude missing or reduced high votage and/or defection, audibe noises, picture interference, and reduced HV or defection. The ony way to determine if the probem is caused by a horizonta drive signa defect or more expensive defects in the horizonta output stage is to accuratey substitute the horizonta drive at the base or gate of the horizonta output transistor. The Base Sub Drive outputs the proper horizonta drive for the base of any bipoar type horizonta output transistor. The drive current is dynamicay adjusted to produce the needed horizonta output transistor coector current and best transistor switching efficiency. This enabes the Base Sub Drive to drive any horizonta output bipoar transistor without excessive heating and/or transistor damage. The Gate Sub Drive outputs the proper horizonta drive for the gate of any MOSFET type horizonta output transistor. When "Drive" is seected, the fuorescent dispay shows the HA2500's horizonta test frequency and the DCV at the chassis horizonta output transistor coector or drain. Pressing the Horiz. Driver Test Or Sub Drive push-button outputs drive to the chassis horizonta output transistor and is accompanied by Coector Or Drain measurements to anayze the operation of the horizonta output stage. By substituting for missing or suspected bad horizonta drive, the HA2500 enabes testing of expensive horizonta output stage components and power suppy stages. It further heps isoate weak, intermittent, erratic, or noisy horizonta drive signa probems which cause improper horizonta output stage operation and/or resuts in output transistor faiure. S E N C O R E 11

11 Substitute B+ Power Suppy Isoates HV Breakdown, Shutdown, & HV/Defection Defects The HA2500's Substitute B+ Suppy substitutes for the chassis B+ power suppy votage. It enabes you to power the horizonta output stage to fu potentia when the B+ suppy or high votage defection reguator has damaged components. It ets you sowy increase the B+ votage and imit the current to isoate horizonta component breakdown faiures and X-ray shutdown symptoms. It provides an effective method of isoating B+ votage defects to the B+ suppy, HV/defection reguator; or horizonta output stage. The Substitute B+ Suppy is variabe from vots to match a wide range of B+ votages found in fu sized CRT video dispays. The votage is switched off or adjusted through its range with the VOLTS contro. The maximum output power of the Substitute B+ Suppy is adjustabe from <3 watts to 80 watts with the Power Limit contro providing circuit and component protection. A fuorescent dispay meters the votage and current output of the Substitute B+ Suppy simutaneousy. The Substitute B+ Suppy eiminates the frustration of not knowing if the probem is in the power suppy, high votage/ defection reguator; or horizonta output stage; and the uncertainty of how to isoate the defect. It eiminates the frustration of measuring momentary votages or engaging in the time consuming process of swapping parts to isoate an X-ray shutdown symptom. It eiminates the hopeess feeing of not being abe to isoate the cause of a component breakdown that destroys horizonta output and power suppy components when norma B+ votage is appied. 12 SENCORE

12 Where Woud You Use Service Area: Where To Use The HA2500: Muti-Scan Horizonta Circuits Computer Monitors (15 khz khz) Medica Equipment The HA2500 Universa CRT Video Dispay Devices Industria Equipment CRT Video Dispay Devices Video Gaming Industry Horizonta Anayzer? CRT Video Dispay Devices NTSC 1575 khz Big Screens Today's video dispay monitors support computer, medica, security, design, and industria appications, to name a few. They operate at many different horizonta scan- ning frequencies and picture resoutions. This is where the HA2500 heps the servicer. Because of the universa design of the HA2500, it And Many Others In-home Servicing Conventiona TV (The Sencore TVA92 TV Video Anayzer is, however, a more compete soution.) can be used in many different service areas. The universa features, such as variabe horizonta frequency, direct dispay of test resuts, and variabe B+ suppy aow the HA2500 to service a wide array of products in an efficient and direct manner. Cost Justify Your Investment HA2500 The HA2500 provides many excusive tests that isoate defects which previousy required many hours of expensive troubeshooting or component swapping. Use the section beow to see exacty how the HA2500 can pay for itsef. Methods of Cost Justification Add up yeary savings or increases in productivity. Topics Time Savings Parts Savings How it Cost Justifies Isoate defects up to 2X faster - more service or refurbish jobs competed Prevent damage to repacement parts Reduce number of repacement parts Repace ony bad parts - not entire kit $ Amount Added Business Retain work with accurate estimates Repair dispays that the parts kit didn't fix More dispays repaired Reduced Cabacks Test for margina performance and find subte stage degradation Increase repair quaity and ongevity Tota Savings & Added Revenue SENCORE 13

13 Team-Up The HA2500 With A Sencore Computer Monitor Generator For Compete Monitor Anayzing Regardess of whether you're using an existing generator or are ooking at a New Sencore generator, the HA2500 wi add to its functions to buid an anayzing system. The HA2500 aows you to input a sync signa and sync-ock a the HA2500's tests to that signa. The CM 125 Computer Monitor Generator, for exampe, provides an accessory output jack that connects directy to the HA2500. And by connecting the CM125 to the monitor's input cabe, you' be viewing the CRT for norma picture when performing many of the HA2500's tests - especiay the base drive and dynamic tests. CM2125 Computer Monitor Anayzer CM125 Pix Pak" Computer Monitor Signa Generator 1 4 SENCORE

14 "Q"determined Approximate coi HA2500 SPECIFICATIONS HORIZONTAL FREQUENCY HORIZONTAL OUTPUT TIME µs RANGE: 0-50 µs SUBSTITUTE B+ SUPPLY GENERATOR LOAD TEST SETUP TIME µs TRIGGER LEVEL: VOLTAGE RANGE: FUNCTION: EXCITATION DRIVE: Squarewave 5% ± 1% of puse VPP >20 VPP < 30 vots to > 180 vots Squarewave generator for Load 50% duty cyce ± 2% POWER OUTPUT: Tests and Sub Driv e functions. B+VOLTS RANGE: vots DYNAMIC TESTS 2 amps ± 10% to 40 vots 80 FRE QUENCY RANGE: VPP RANGE: autoranged (BASE OR GATE METER) watts ± 10% over 40 vots <15 k Hz to >125 khz VPP VPP RANGE: 0 VPP to 50 VPP POWER LIMIT RANGE: < 3 watt (min) to > 80 watt EXTERNAL SYNC INPUT: HORIZONTAL OUTPUT DYNAMIC TESTS INPUT SIGNALS: Horizonta Sync. Composite Sync, Composite Anaog Video (± Poarity) FREQUENCY RANGE: 15 khz 125 khz SENSITIVITY: Composite Anaog Video >.5 VPP Horiz. or Composite Sync > 2 VPP HORIZONTAL OUTPUT LOAD TEST B+ POWER SUPPLY VOLTAGE RANGE: 0-18 VDC ± 0.5 vots. CURRENT LIMIT: 250 ma ± 10% LOAD TESTS B+ ma RANGE: ma TIME µs RANGE: 0.1 µs - 50 µs TIME µs TRIGGER LEVEL: 5% ± 1% of pos. puses with VPP > 10 VPP RINGER TEST FUNCTION: Approximate coi "Q" determined by exciting the coi and counting ringing cyces to a damped eve. DYNAMIC TESTS (COLLECTOR OR DRAIN METER) VOC RANGE: Autoranged vots VPP RANGE: Autoranged. 0 VPP to 1500 VPP (HORIZONTAL DRIVER TEST) FUNCTION: Measures the horizonta stage output current capabiity by simuating a ow impedance base/emitter transistor junction. BASE ma RANGE: GENERAL FLOATING GROUND ISOLATION: 600 vots (DC + peak AC) from "-" termina to chassis ground with < 500 µa DIGITAL DISPLAY: Vacuum fuorescent matrix 40 x 2 AC POWER: 105 to 125 VAC 50/60 DYNAMIC TESTS (SUB DRIVE ) Hz. May be factory converted to FUNCTION: 220 VAC. Substitute drive optimized to SIZE: 6" X 11.5 X 15.5 propery drive the base or gate of (15.2 X 29.1 X 39.3 cm) HWD any horizonta output transistor. WEIGHT: 14 bs. (6.4 kg.) BASE SUB OUTPUT: Squarewave 50%, -2/+6% duty cyce A specifications aow for GATE SUB OUTPUT: Squarewave, 20 minutes of warm-up and are 50% duty cyce ±2% guaranteed at 15 to 35 degrees C. Accessories Suppied: 1. 39G470 Load & Ringer Test Lead 2. 39G469 Dynamic Test Lead 3. 39G481 B+ Suppy Lead Optiona: 4. 39B296:A Video Test Cabe 5. 39G508 Composite Sync Cabe 6. 39G348 Drive Sync Cabe 7. 39G494 Dynamic DVM Test Lead 8. HP kv High Votage Probe 9. TP kv Transient Protector Probe 10. PC263 Protective Cover S E N C O R E 15

15 A Sencore Instruments Are Backed By Our Excusive 30 Day Money Back Guarantee "If you are not competey satisfied with any Sencore instrument. you may return it during the first 30 days, and we' give you a fu refund, incuding freight, no questions asked. To Free Access To the Entire Factory Sencore does not stop providing assistance after you purchase one of our instruments. We provide free technica assistance on any instrument use questions, future purchase assistance, industry trend information, instrument service, or any question you may have or test instruments. Just ca Sencore at our to free SENCORE number. Your Area Saes Engineer, an Appication Engineer. or a Service Technician wi be happy to assist you. Sencore s Excusive After-The-Sae Support Made Right Guarantee In addition to the 1 year warranty on parts and abor (ess than 2% are returned for warranty service). Sencore offers you a 100% Lifetime Made Right Guarantee. We guarantee your instrument was engineered right the first time. If there s a probem, we' make it right, for the ifetime of the instrument. Extended Service Agreement Programs (ESA) Sencore announces our new Extended Service Agreement Programs for your HA2500. These programs can be an extension of your warranty coverage or simpy a method for you to have annua caibrations at a reduced rate. For further information regarding these programs, pease contact your Area Saes Engineer or the Service Department. Sencore One Year Warranty Every Sencore instrument is warranted for one year against defects of any cause except acts of God and abusive use. During this warranty period, Sencore wi correct any covered defect without charge for parts, abor, or recaibration. Sencore Vaue Added Services The HA2500 is certain to pay an important roe in heping you achieve maximum efficiency and profits in your video dispay refurbishing, repair. or maintenance operation. To hep you reaize the maximum benefits offered by the HA2500, Sencore provides a fu range of after-the-sae product support services. These services incude: 1. Sencore News magazine pubications featuring technica artices on the HA Technica Training Courses on horizonta & reated stages. 3. Video Training Tapes 4. Appication Engineers to answer HA2500 appication questions. 5. Sencore Website for HA2500 service and support information. 6. Fied Trainers hoding technica training casses on computer monitors, horizonta stages and appying the HA A fu factory service department for timey repairs and instrument updates. Ca SENCORE ( ) SENCORE 3200 Sencore Drive, Sioux Fas, SD Direct: (605) Fax: (605) #6711