The Speaker

The Voice of Nesda Ohio
Electronics Servicing Professionals August 2009 Edition
NesdaOHIO June 09 Meeting

Topic: Online Resources

BY: Speaker Staff Writer The June meeting took place at the Clarion Inn in Hudson Ohio. This is the same location that we have been meeting, and hosting the annual NesdaOHIO Weekend of Training - But under a new name. The name had been changed from the former Holiday Inn, but everything else has stayed the same.Including our meeting room called the "Summit Room", which is appropriate, since the hotel is located in Summit County, Oh. 7 PM on June 16th saw members Bob Lowe, Joe Sopko, Tim Murtz, Rich Uminski, Dave Downey, Jeff O'connor, Denny Schiller, and Doug Rust gather to hear a substitute speaker. Today's featured Attraction was to be a continuation of President Phil Skoff's fine program of Computer Training carried over from the previous month. Unfortunately, Phil was indisposed by a medical treatment and a substitute speaker of equal value had to be found. When that wasn't possible, The Speaker's "Computer Illiterate", Joe Sopko, was pressed into service because he works cheap (It's not only TPA's that look at the 'Bottom Line'). There is no way in the world that "The Computer Illiterate" could have carried on with Phil's intended program, so he presented an alternate program titled : Online Resources. Joe managed to turn on his laptop, and then astounded many in the room by actually being able to connect it to the Inter-net via the Hotel's wireless system. Joe said that his intent was to show a series of websites that would assist us in our daily work.

American Pride

Please Patronize Our Sponsors. They Make This Publication Possible !!!
PTS Electronics PacParts, inc. Vance Baldwin Tritronics B&D Enterprises The first site that he showed was www.nesda-ohio.com, our own Web-Site. Joe brought Andrews Electronics up the "Member's Only" page and showed the content in that area. NesdaOHIO has been Cumberland Elect collecting useful items such as Service Menu Codes, Lamp Reset Procedures, PTV Convergence Procedures, Direct View Alignment procedures, and many more technical ShopJimmy.com
matters and storing them in that area. He showed a couple of examples of each of them for our information. If you have any service procedures that you want to share, please send them to rpurkhis@tampabay.rr.com for inclusion in this collection.

In This Issue :

Online Resources 1
Tech Tips 4 CET Teaser 5 TV Tires & Fenders ?? 5
Training, Training 7 Sony KV-27FV169 Inside an LCD Panel 10
Teaser Answer 13 Meeting Info 14
Then he moved on to www.tech-assist.org, a valuable site of Tech Tips, Tech Chat, and Service Manuals. Joe logged in using the Tech Assist Free Trial Password that has been granted to nesdaOHIO members by the web-site's owner. As of the class' date, there were still 180 days to go on that password. After logging in, we were shown how to find a tip on a sample Funai TVCR and how to download a schematic for a different model television. A Tech Chat is also available on Newsletter Hotline ! this web-site, making it a valuable resource. Got A News Item ? Tech-Tip ? Correction ? Cont. on Page 3 Please Contact: Joe Sopko, 216-381-1140 Chief Writer Joe Sopko informs us. jsopko112@aol.com OR A small boy swallowed some coins and was taken to a Ron Purkhiser, hospital. When his grandmother telephoned to ask 352-666-4773 rpurkhis@tampabay.rr.com how he was, a nurse said, 'No change yet.' The Speaker August 2009 Page 1

The Speaker August 2009

Page 2
Cont. from Front Page NesdaOHIO and Tech-Assist members Jeff O'Connor and Dave Downey mentioned some other features of this fine web-site for our information. Then Joe visited http://www4.sears.com/ (note that there is No Dot between the "WWW" and the "4". You will need to sign up for a FREE password, but once you do you will be able to enter the model number of just about anything around the house and access an Exploded View and a Parts List for it. Joe brought up information about a GE Microwave, then raised eyebrows when he entered LT140* (a Lawn tractor) and found the part number for a front wheel bearing - and internal engine components. There is a wide variety of products available at Sears, and Joe showed how to find a part number for the Motor brushes of a SkilSaw before another minute had passed. He said that he uses this site a dozen times a day, and not just at the shop. You think parts for TV's are hard to find? Try finding a part for your Kitchen Mixer or other small appliance! The computer was directed to www.appliancefactoryparts.com where a Kitchen Aid K5 was selected and the Exploded view found. The "Sacrificial Gear" was pointed out as a good money maker for a service shop to repair. Other small appliance parts sources were included in that list, not only for your customers, but for your own use. Tech Tips are always a problem to find, but The Computer Illiterate traveled to several web-sites where technicians can join and access tips. A couple of examples are Dennis Viereck's http://wa6ati.com and http://www.tvtechdata.net/forum/bbs/ index.php On some of these sites, you need to sign up for a FREE password, but they provide valuable information. Not only Tech Tips, but Schematics are always difficult to find, and Joe took us to the "Electronic Service Information" site at http://eserviceinfo.com where thousands of schematics reside. He then showed us where we can download from some manufacturer's sites, and even where some "No Name" Brands ( ILO, VIORE, Etc) can be found. Surprisingly, some were in our own back yard at Fox International's http://esi.foxinternational.com Techs like to talk, and there are several Tech-Chat rooms around the inter-net. Some have been mentioned before, since they also carry Tips and Schematics ( Tech-Assist and WB6ATI). At the Last nesdaOHIO Weekend of Training event, we met several members of the "Nothin' But Sparks'" service forum, and we now have their address http:// disc.yourwebapps.com/Indices/179708.html where you could resume your conversation with them. There were a lot of web-sites that Joe took us to that night, and space doesn't permit us to list every one of them within these pages. He showed us sites devoted to information about Stereo's, Phonographs, Guitar Amps, and Car Radios (Including one site that told how to get that #&$# Radio out of the Dash). As a "Blast from the Past, Joe even showed where you could download Riders for your Antique Radio and Beitmans (a contemporary of Riders from 1926 to 1969). By the time we were done, we felt as though we qualified for Frequent Flyer Miles for all the traveling that we did around the world wide web. Should you wish to view these addresses, please visit the document titled "Resources" located at:

NESDA of Ohio

State President Phil Skoff, CET 330-922-7800 State Vice President Tim Murtz, CSM 440-232-5620 State Treasurer Rich Uminski, CSM 216-641-9470 State Secretary Bob Lowe, CET/CSM 440-247-7391 Directors Rich Uminski, CSM 216-641-9470 Jim West, CSM 440-237-6888 Joe Sopko, CET 216-381-1140
Newsletter Joe Sopko, CET 216-381-1140 Ron Purkhiser 352-666-4773

DISCLAIMER

Information presented in "The Speaker" is derived from many sources and is believed to be correct at time of printing. We make no guarantee, express or implied of the accuracy, efficacy, or safety of any of the techniques published. It is not intended to replace Manufacturer's Recommendations or good Safety and Troubleshooting practices. Use at your own Risk. The Speaker, its Writers and Staff, and Nesda of Ohio assume NO responsibility for damage to persons or property as a result of any information printed herein. Opinions stated are those of the author and not the Nesda of Ohio Newsletter. Opinions stated are believed to be true, and are offered in the spirit of helping other servicers but may have no basis in fact.
http://www.nesda-ohio.com/Resources.html

Page 3

Tech Tips
RCA TV, Model P52770EB Problem: Vert is short and jumping Fix: Replacing C4502 fixed the set. Hitachi TV, AP-1X chassis Problem: Dead Fix: Replaced Q777 on the def board. 2SC4589 Mits TV, VZ7 chassis Problem: Video Piecrusting/Streaks Fix: Replaced C933 near IC451
Hitachi TV, Model 42EDT41 Problem: After running 10 minutes a thick vertical bar appears on left side of screen Fix: Bad solder on the resistors located on the ribbons from the panel to X boards. Resoldering fixed the set. Samsung TV, Model HL-R4667W Problem: green bars in pic and pic mostly green. Fix: Replace the digital module Panasonic TV, AEDP178 chassis Problem: Lines, no raster or sound Fix: Replaced Regulator IC STR3230, and R805, 10k /half watt. Check R810 also.
Sony TV, Model KV25XBR Problem: Dead, wont power up Fix: Found C1663 in the horz def tank bad RCA TV, ATC010 Problem: Dead, 25 blink code Fix: Replaced the following, IC801, #268348, Q405 and Fly T402 #271996 RCA TV, CTC185 Problem: Dead, clicks 3 times Fix: Replaced 2 parts, Q4116, 242204, CR4117, 207878 Sylvania TV, Model SRT2027 Problem: Dead, fuse OK Fix: Found bad solder on stand up resistor in power supply, R601, 0.47 /7watt Sony TV, DA4 chassis Problem: Dead, 7 blinks Fix: Replaced IC6501 and IC8002, both MCZ3001DB. Can use Hitachi CP08451U RCA TV, CTC195 Problem: Convergence option 4 under screen on menu is missing. Fix: Replaced R19722, 750k

Mits TV, VZ7 chassis Problem: The Video is unstable when set is Hitachi TV, 50fx18B cold. Problem: Shuts down intermittently Fix: Replacing C2P07, 47uF/35V, near Fix: Found Q913 leaky, Replace IC2P03 fixed the set Mits TV, XM1 chassis Problem: Audio whine Fix: Replaced open C721 and C722 off ppins 45 & 46 of IC701. 10uF/50V Sony TV, Model KV32XBR250 Problem: Good pic, but no color. Fix: Replace D/A converter, IC1001. Part #8-752-058-68
Emerson LCD TV, Model LC320EM82S Problem: When set turned on, backlight blinks, then goes off. Fix: One of the 6 backlight transformers has an open secondary. Replace the bad one. This is Funai built, you can get the transformers from them, parts@funaiservice.com #LTZZPC0MS008 The whole board is #1FSA10164 if you want to go that way. The Speaker August 2009 Page 4

CET Brain Teaser

From the CET Study Guide and Practice Test
TODAYS QUESTION is presented in The Speaker just for fun with the permission of the ISCET, and maybe will get you started thinking about hanging out your own CET shingle. For more information, we invite you to visit the ISCET website at www.iscet.org We are grateful to them for allowing us to present this feature. Todays question is from the CET Audio Study Guide provided by ISCET
To test that the transmission line and antenna are operating properly use a. 1. 2. 3. 4. reflectometer Spectrum analyzer Sinadder Deviation monitor
Correct answer on page 13
The Rear Racing Tires & Fenders Case
No, youre not reading about the latest doings of NASCAR, although the title might lead you to believe that. Instead, This is a Disney "Car TV" model C1310ATVD --A cute little red TV just like YOU would have wanted when you were a kid Go On, Admit it ! All it needed a "simple" cable input replacement; however, back removal was an obstacle.

BY: Franklin

Thomas
In my 40 years of TV servicing, this is a first for me. I thought it might be at least entertaining to those of you who haven't seen this one yet! Happy servicing adventures to all! !

After trying all of the Normal, Approved Methods, Finally, I discovered the trick: The rear wheels & fenders have to come off in order to remove the back; but, the screws are hidden. I submit the following: -remove rear lug nuts (pulling gently with needle nose pliers) until exposing wheel cover anchor screws, then remove screws -remove wheel covers to expose & remove wheel anchor screws -remove rear wheels to expose & remove hidden back anchor screws
[EDITORS NOTE: Franklin Thomas is the Owner-Operator of Thomas Mobile TV Services in Savannah, Georgia One of the most Picturesque cities in the Old South. The Speaker thanks Franklin for sharing this experience with our readers.)
Heres Lookin at You, Kid.

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TRAINING - TRAINING - TRAINING IN OHIO

BY: Joe Sopko, CET

CALLING ALL TECHS. CALLING ALL TECHS.
NesdaOHIO IS PROUD TO ANNOUNCE the 16th Annual WEEKEND OF TRAINING is scheduled for September 2009 only about a month away, so if you havent signed up yet, You Better Get Crackin Six Major Electronics Manufacturers will be presenting information that will add to our storehouse of skills. Best of all, None of these classes conflicts with another, so you can catch all six of them. Each trainer will present a Half day class on their Latest and Greatest Product for your undivided attention. If you were frustrated at the National NPSC when two classes were scheduled in the same time slot, you can catch what you missed Here. Sony will cover their new LED and Edge-Lit Flat screen products. Samsung will show the new Slim, Thin, and Green LCD Televisions. Toshiba will explain Troubleshooting techniques used to repair LCD. LG will discuss Troubleshooting LG LCD and Plasma Televisions. Philips is returning to Ohio to instruct us in Sylvania Branded product First time weve Ever had any dedicated training on that brand. And Mitsubishi will showcase their Flat panel Televisions as well as their new LaserVue product. Thats a lot under One Roof, and it will take 3 days to cover it all. The event is scheduled for Sept 17, 18, & 19 at the Clarion Inn in Hudson. Ohio (the former Holiday Inn_. (About 500 yards north of Ohio Turnpike exit 180. The Training room has Theater seating, and a good sight line from every seat in the house. If youre flying, you can fly into Cleveland (CLE) or Akron (CAK) and if youre driving, a confluence of Interstates lead right to the door. We invite you to attend and hone your technical skills with your peers from across the country. In the evening, the interaction in the Hospitality Room with techs from other states is an added bonus. The exchange of ideas & practices among peers goes a long way towards solving problems. For the full details of the Ohio training go to www.nesda.ohio.com. DO plan on attending. Whens the last time manufacturers held a training seminar in city? The Clarion Inn has a special room rate for nesdaOHIO visitors of $79/nite a lot less than Major cities, AND theres free parking. You can download Ohios Training schedule and details of the event at

www.nesda-ohio.com,

Then, Download the Registration Form, Strap it to a Snail, and mail it to: Ron Purkhiser 2051 Fentress Ct. Spring Hill, FL 34609
But Dont Delay. Seats are filling even as you read.
THURSDAY SEPT 17 AM SONY: Sonys Edge Lit and LED Lit LCD Television PM MITSUBISHI: Flat Panel and Laserview Television FRIDAY SEPT 18 AM_TOSHIBA: Troubleshooting Techniques for the New Flat Televisions PM SAMSUNG: Slim, Light and Green LCD Television SATURDAY SEPT. 19 PHILIPS: Troubleshooting Sylvania Flat Panel Televisions PM LG: Troubleshooting Plasma & LCD Television

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The Adventures of Sherlock Ohms

stove in his

By: John H Watts-on MD
The Adventure of the Single Solving
Sony KV-27FV16 It was a dark and stormy night that found Sherlock Ohms, the worlds foremost consulting detective, and myself exiting the Queen Mary in the Port of Cleveland, Ohio. A Marvelous Crossing, Watts-on, said Ohms, his eyes bright in anticipation. Who would have thought that that she could put on such a burst of speed as we bounded through the waves of the North Atlantic? Yes, Ohms, said I. It seems as though Cunard has made good on its boast to have the old girl give 35 MPH But the weather at This end of the St Lawrence is certainly dismal. Not to worry, Watts-on said Ohms. It wont last. Winter in Cleveland is over, their snow cap melted in April, and from the look of things, a Chlorophyll explosion is in the offing. That will fill out some of those skeletal trees. Besides, it will be good to see our friends in nesdaOHIO-Land once more. After settling in at the Hudson Clarion Inn (site of Septembers nesdaOHIO Weekend of Training), Ohms ordered a carriage to take us visiting. We stopped in at nearby Northfields Professional TV to visit Jim Mancuso, who himself has just returned from Florida. Then we paused in Bedford Hts to visit Tim Murtz at Excel Television, who had recently painted the building of his shop with an attention-getting pumpkin colored hue. Even Ohms had to admit that it caught His (and everyone elses) eye. Then we made trip to Garfield Heights to visit J and R TVs Rich Uminski and his Shop Cat. I must say, Ohms, My bones are growing weary of these Cleveland Streets. I Do believe that even Londons cobblestones are smoother than these Potholes. I remarked as we continued north on the I-271. Ohms countered that with the coming of Spring, The state flower will soon be appearing on Ohios highways, and indeed, we could see the presence of many orange barrels making themselves known even as we drove. Its not much farther, Watts-on, and I Do So want to visit the South Euclid Service-center. The proprietor there is Such a Nice Person, and he always has such interesting little problems on his workbench. A Trip to nesdaOHIO land would not be complete without a stop at Joe Sopkos Consumer Service So it was, that Sherlock Ohms and Dr. Watts-on walked into that little shop on Mayfield Road in South Euclid, Ohio on one fine spring morning. We were warmly greeted by the proprietor, as is everyone who enters his shop, and as we sat around the Pot Bellied The Speaker August 2009 Page 9 spacious lobby, drinking our hot cocoa, we basked in the war mth of becoming reacquainted with our American friends. I Say, Joseph, That looks an interesting Sony on yon workbench, said Ohms, casting his eye around the room.

Yes it is, said Joe. This Sony KV-27FV16 came in Dead as a Dormouse, as you English say, and is proving to be a Proper Bugger, he said, chuckling to use a British expression. Ive just begun work on it. The owner had bought a TDA8172 vertical chip and replaced it himself, based on some information that he found on the Inter-Net about a 4-Blink Code. The only good that that Code did was to fatten our pockets with a Parts Sale. When we sold the IC, we offered to repair the Real Trouble when the IC didnt fix it. Ohms agreed that many times diagnostic codes can be misleading, and then asked Joe what he had done to the set so far. The CET replied that he had only done the preliminary work so far and found that there was No B+, No Fuses Blown, But that there was a Relay Click when the Power button was pushed. Ohms suggested that resistance Quick Checks be made at the Horiz. Out Collector and B+ diodes to troubleshoot the most common failure areas first. These areas were eliminated when they tested Normal.

Cont. on Page 12

Didja Ever Wonder?
W h a t was inside one of those LCD Display Panels? What those CCFL (Cold C a t h o d e Fluorescent Lights) look like? Didja ever wonder why we cant just get the lamp and change the bad one?

BY: Speaker Staff Writer

Member Tim Murtz, CSM
Well Tim Murtz of Excel Television in Bedford Hts, Ohio did. He wondered enough that he disassembled a LCD panel from a Scrap TV and in the process he learned a few things. One of the things he told us that he learned was that it is a Royal Paininnyass to get these things apart. There were FIVE sheets of diffuser panels and filters sandwiched in front of those backlights
Even if you succeeded in removing the Lamps Ends from their clasps, youre still not home free. There are some plastic supports in the middle of the lamp that wont allow you to lift out the lamp until they are released. Tim said that the heat from the panel has made those plastic supports quite Brittle and they will break very easily. Tim had diagnosed the bad lamp by placing a scope lead next to each Inverter Transformer. ONE of those transformers showed a Larger waveform than the other 11. Tim suspects that is because the lamp is not conducting to load it down. He says that Someday when he has some more time to Play he might try to order a lamp from a vendor like Digikey or LCDparts.net and attempt a replacement and see if this Display assembly could be made to work. Right now, he says that he can see why we dont routinely replace the bulbs Only the Panel. Its a lot of work, and the hazards of breakage are great. We thank Tim for the time he has spent in satisfying our curiosity. Well hope for a Part Two Someday.

And they were as limber as a wet Tissue! Then he discovered that on this panel those tubes are Very Thin. He compared the diameter of the Glass tube to the size of the shaft on your pocket screwdriver. Yeah, its THAT Small! These lamps were held in sockets at each end of the lamp 12 lamps, so 24 sockets in total. The lamps are not soldered into these sockets but are held in by little metal Grabby Fingers. These fingers would have to be spread apart to release the lamp, but Tim commented that the fingers are Very Tight! He also commented that the lamps are Extremely Fragile to handle. You would not want to do any prying on those lamps to force them out of the socket.

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Page 11
Cont. from Page 9 While the technician was busily metering transistors and diodes, Ohms bade me to open a schematic of the Television. These are available via the Members only Page of the nesda (National) Web-Site, Watts-on, said Ohms. We must remember to Thank Sony for allowing this access. I connected to the Inter-Net and opened the service data for the KV-27FV16. My, What a Busy Circuit, commented Ohms, viewing the Block diagram on the monitors screen. This is Not your Garden Variety Power Supply, but then Sony always did design rather Busy circuits. From the look of things, there is both a Standby AND a Normal SMPS, and monitored for Overcurrent, OverVoltage and Sweep Loss. I Hope you Packed a Lunch, said Ohms. I think you may be here for a while.
Oh, Quit Whining! exclaimed Ohms. You sound just like that Chappie in Bedford Heights Whats his name? Tim?Tom? Something like That. Look, I can see the defective component from here. The technician asked where the fault was, but was rebuffed. Ohms said Thats for You to find out, Joseph, but I can guarantee that you are no more than two feet from the problem And so he was, since he was sitting close to the Television. Your having me on, arent you, Mr. Ohms laughed Joe. And as it turned out, he Was sitting close to the problem, and the faulty component Was in plain view. Under the guidance of Ohms constant instructions, Joe eventually placed the Voltmeter probe on the Drain (Pin 3) of the STRF6426 IC601. There, he found Zero Volts where there should be 157, and started tracing it back to the Raw B+ Source at the Bridge Rectifier. Along the way, he found R626, a.47 Ohm Fusible Resistor in series with the B+ to be open.
No, Mr. Ohms countered Joe. Im on a Diet that just means that well just have to fix it more quickly. Ohms was taken aback at this bit of American repartee. Then Ohms suggested that since the Relay was working, the Standby Supply could be eliminated as a source of trouble, and that measurements in the Normal supply be taken. Easier said than Done, Mr. Ohms said Joe. These Sonys are pretty Tight in there, and there isnt a lot of room for manipulating Boards into a position where they can be easily measured.

Ohms bade me use my surgical skills to transplant a replacement resistor into the PCB, and this I did. We dont want to tire out this young fellow, said Ohms. Even though he Is the youngest of the nesdaOHIOANS at age 49, he has done a lot of pulling and probing of circuit boards today. Go ahead, now, apply that Power and let us see what happens. Before applying Power, the Technician confirmed that there were no shorts off of the IC601 pins or the diodes associated with the SMPS. No other resistors measured open in that circuit so it was decided to continue with the power test instead of replacing the IC in addition to R626. When The power cord was plugged in, we were met with the reassuring crackle of HV, and a couple of seconds later with the picture and sound of Clevelands Fox-8 channel. It was quite a good picture, actually, but that was to be expected with the Sony Wega series of Flat-Kine Televisions. It may not have an ATSC Tuner, but the quality of the images that it was showing would give an ATSC Television a run for its money.

IC 601

Cont. on Page 13

Page 12

Cont. from Page 12
Ohms had to point out that it was unfortunate the customer had relied on information gleaned from the Inter-Net and changed the incorrect part. Four Blinks Is indicative of a Vertical failure, he told us. And The System Control, which is operating off of the independent Standby supply, is reacting to Sweep Loss. It is a certainty that Sweepalong with many other items Would be lost with a failure in the Primary Power Supply. There are those who would say that It Served Him (The Customer) Right for replying upon the InterNet instead of a qualified local technician. Ohms is not one of them and mentioned that the customers experience should just make him appreciate a qualified technician all the more. Now, Watts-on, said Ohms. Do Pour us another cup of Cocoa and place another log in the PotBelly theres a good fellow If the proprietor will allow us, this will be a perfect afternoon to watch Judge Joe Brown. (Please pass me the foot-stool)
Answer to CET Teaser on Pg. 5
Answer 1, reflectometer is correct. It is best to check the transmission line and antenna when actually transmitting a signal. If everything is proper the output of the transmitter will match the impedance of the transmission line that in turn will match the impedance of the antenna. This will allow the proper eradiation of the signal. The reflectometer, aka output meter or VSWR, is placed at the output of the transmitter where it meets the transmission line. It will measure the power going to the antenna but it can also measure the reflected power back to the transmitter from the antenna. This reflected power would be due to an impedance mismatch. If the transmitter is designed to put out 50 watts, ideally, the reflectometer should show 50 watts in the forward direction with no reflected power in the reverse direction. This would represent an ideal VSWR of 1, or 1:1

www.pacparts.com

The Speaker August 2009 Page 13
2051 Fentress Ct. Spring Hill, FL 34609
PH. 352-666-4773 E-Mail rpurkhis@tampabay.rr.com PRSRT STD U.S. POSTAGE PAID CLEVELAND, OH PERMIT NO. 944
NesdaOhio Monthly Meeting:
THIRD Tuesday of most months. Room 100 - Clarion Inn, 240 E. Hines Hill Rd. Hudson Oh. 44236 330-653-9191 On St. Rt. yards N. of Ohio Turnpike exit 180. 6:30 PM

Page 14

The Speaker

The Voice of Nesda Ohio

Electronics Servicing Professionals Jan. 2010 Edition

BY: Chuck Yeager

The Constellation Effect
Time was, that the Lockheed Constellation Ruled the Airways. The time was the Late 40s & 50s for the Civilian market, but the plane was actually designed for Howard Hughes in the late 30s. It served the military as a C-69 during the war, and with its top speed of 350 mph it was actually faster than a Jap Zero. After the war, this was the plane that made Transcontinental flight in a single day possible. Besides, with its 4 2000+ Horsepower engines turning 15 foot diameter props, and the Triple Tail, it just Looks Cool! Something that doesnt look quite as cool is the Constellation Effect that we are starting to see on some DLP Televisions, such as this Samsung model HLS4266 pictured below. Although these Stars are also present in a normal picture, they are most noticeable if you select a Video input with no signal. As figure 2 shows, they DO have the appearance of a Night Sky far from the city.

American Pride

Please Patronize Our Sponsors. They Make This Publication Possible !!! Tritronics B&D Enterprises Andrews Electronics Cumberland Elect PTS Electronics PacParts, inc. Vance Baldwin

Fig. 2

In This Issue :
Changing DLP chips1 Tech-tips 4 CET Brain Teaser 5 Ohio Rainy Day Rule5
First game of a double header
The stars may look picturesque, but they sure are annoying when youre trying to watch your favorite TV show. Theyre even more annoying when you realize that they indicate a failure of the Micro-Mirror Device that is the DLP Chip. That miracle of Texas Instruments Image Technology that produces the Crystal Clear and Intense picture that is characteristic of a DLP TV is unfortunately showing one of its failure modes. [EDITORS NOTE: If you cannot see the pictures clearly in ther PAPER version of The Speaker We invite you to view them online at www.nesda-ohio.com (click on The Speaker) where you will see them, in greater detail and in full living Color] Cont. on Pg. 3 Chief Writer Joe Sopko sez. How come it takes so little time for a child who is afraid of the dark to become a teenager who wants to stay out all night? The Speaker Jan. 2010 Page 1

Newsletter Hotline !

Got A News Item ? Tech-Tip ? Correction ? Please Contact: Joe Sopko, 216-381-1140 jsopko112@aol.com OR Ron Purkhiser, 352-666-4773 rpurkhis@tampabay.rr.com

Toshiba TV/VCR/DVD 9

Second game of a double header
Toshiba TV/VCR/DVD 10 Windoz 711 Teaser answer 11 Meeting info12

The Speaker Jan. 2010

Page 2
Cont. from Front Pg. The DLP Chip may contain 2 million or so of those incredibly small Micro-Mirrors One for each Pixel and each one is hinged so that it can tilt to reflect the intense light from the UHP lamp either out to the eyes of the viewer for that pixel or in a direction that would keep the light from escaping the cabinet. Aye, Theres the rub, to quote Macbeth Those hinges on the Micro-Mirrors. Apparently some of those hinges are giving way, and allowing that pixels mirror to become stuck and continually reflect light outward never turning Off that pixel. Methinks that this may well be a problem that we will be seeing more of as these DLP sets age. If you figure out how many Flexations those hinges have to undergo during the viewing of a movie day after day it stands to reason that a mechanical device like the hinge can suffer fatigue. When that happens, Someone thats You - is going to have to change it. At this point, you might be thinking Light Engine, but lets face it, this thing is now several years old and is out of warranty. Do You really think a customer is going to spring for an expensive Light Engine? Well, were here to tell you that you can change the DLP display IC and it is not very difficult at all. No, its not as easy as changing a Lamp, but we all do harder jobs than this every day. Read on if you want to see the documentation of a DLP Chip Transplant. Fig. 4 After removing the Cabinet back and the lamp, Disconnect and remove the Light Engine as this chap from Bedford Hts, Ohios Excel Television is doing in figure 4. This allows you to carry it over to the workbench where you can get comfortable with a nice chair and a cup of coffee while youre doing the job. You wont be able to put your feet up and relax, but each step of the process is straightforward, and if you take your time, you will make an easy job of it.

NESDA of Ohio

State President Bob Lowe, CET/CSM 440-247-7391 State Vice President Tim Murtz, CSM 440-232-5620 State Treasurer Rich Uminski, CSM 216-641-9470 State Secretary Joe Sopko, CET 216-381-1140 Directors Jim Mancuso 330-467-0777 Jim West, CSM 440-237-6888 Jeff O'Connor 724-775-7123
Newsletter Joe Sopko, CET 216-381-1140 Ron Purkhiser 352-666-4773
With the Light Engine sitting on the workbench, remove the black panel surrounding the Lens, and the Fan (See Figure 5) You may also want to dismount the Fan-Door Switch to give you a little more working room. Once you have the Fan out of the way, you will see a large, Cruciform Heat Sink covering the Backside of that DLP Chip right in the center of the DMD Board. That heatsink is held in place by a long Metal GrabbyFigure 5 Spring, and you will have to unclip that spring in order to remove the Heat Sink. A pair of Curved Long-Nose pliers worked well for that as seen in figure 6.

DISCLAIMER

Information presented in "The Speaker" is derived from many sources and is believed to be correct at time of printing. We make no guarantee, express or implied of the accuracy, efficacy, or safety of any of the techniques published. It is not intended to replace Manufacturer's Recommendations or good Safety and Troubleshooting practices. Use at your own Risk. The Speaker, its Writers and Staff, and Nesda of Ohio assume NO responsibility for damage to persons or property as a result of any information printed herein. Opinions stated are those of the author and not the Nesda of Ohio Newsletter. Opinions stated are believed to be true, and are offered in the spirit of helping other servicers but may have no basis in fact.
Remove Fig. 6 The Heat-Sink had to be removed because as part of the procedure, the DMD Board has to come out, and that means that the Shield covering the DMD has to come off. You cant get the shield off with that Heat-Sink in place. Cont. on Pg. 7 The Speaker Jan. 2010 Fig. 7 Page 3
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Tech Tips

Sony TV, Model KV32XBR51 Problem: Intermittent bright white with retrace. Fix: Discovered bad solder around the Flyback, especially the 200V pin. Panasonic LCD, PT50LC13 Problem: No right channel audio Fix: Resoldered connector P4503 on the audio output board. Panasonic TV. Model CT32G31UNA5 Problem: Picture is shrunk. Fix: D556 was bad. Sanyo TV, DS19630 Problem: No audio or low audio Fix: Adjusted the FM-DET coil, T131 Zenith TV, 9-1407 module Problem: Dead Fix: 5V power line low, caused by leaky C6031, 0.47uF Hitachi TV, AP-5X and 6X chassis Problem: Color, Tint, Brightness, bad and cant adjust. Fix: Replaced XX02, XX03, IX01
Communicate with other techs Solve problems Schematics to download Database of thousands of fixes
RCA TV, M134C chassis Problem: Shuts down after a minute or so. Fix: Discovered bad solder on C806 Mits TV, Model CK3531R Problem: Intermittent video and audio Fix: Check for 11.4V at pin 1 of IC8A1. If low or missing check R8A1 located at pin 1 for cold solder connections. (signal Bd) RCA TV, CTC211 Problem: Wont start Fix: Found open connection at pin 1 of T14300. Then set would cycle the 200V to the kine board was activating the xray protect circuit. Found T14751 was shorted RCA TV, DTV306G Problem: Unit is pulled in on the sides. Fix: Scan B+ was 76V instead of 123. CR14802 was found shorted. Hitachi TV, 60DX88B Problem: Loss of Horz sync. Fix: Replaced flex converter.
Fix: Replaced C2P05 near IC2P01, 100uF/16V, and C2C52 near Q2C51, 10uF/50V Hitachi TV, 50FX18B Problem: No audio Fix: Replaced D309 RCA TV, ATC010 Problem: Dead or turns on briefly then dead. Fix: Found Q281 bad, #270785 Sylvania TV, SRT2027 Problem: Dead, HOT Q571 shorted. Fix: Replace all the following: Q571 HOT, 2SD2634, R574, Metal resistor, 470 /2W, R575 Metal resistor, 1.5k 2W, C571 Metalized film cap, 0.33uF, and C572, 0.18uF/250V Toshiba TV, 32A40 Problem: intermittently the vert collapses to a flat line in from each side. Fix: Resoldered 9V reg, Q421
Mits TV, VS6017R Problem: Vertical collapsed, HV OK Mits TV, VZ8 Problem: Video is dim, Vert shrunk some- Fix: Discovered Pin 3 of AJ connector (9V Line) has intermittent connection to signal what, Horz. Tearing. board. Located on video Bd. The Speaker Jan. 2010 Page 4

CET Brain Teaser

From the CET Study Guide and Practice Test
TODAYS QUESTION is presented in The Speaker just for fun with the permission of the ISCET, and maybe will get you started thinking about hanging out your own CET shingle. For more information, we invite you to visit the ISCET website at www.iscet.org We are grateful to them for allowing us to present this feature. Todays question is from the CET Audio Study Guide provided by ISCET
In an AM transmitted signal the modulated radiated wave contains: 1. One effective sideband pair 2. Two effective sideband pairs 3. An infinite order of sideband pairs 4. No sideband pairs
Correct answer on page 11

Saving for a Rainy Day

BY: Speaker Staff Writer
I Hope you've been saving for a Rainy Day, because you just might be needing it. Ohio Lawmakers, in their never-ending quest to dip their hand in your pocket have come up with what they call the "Ohio Rainy Day Rule". A new Traffic regulation that took effect July 1 requires a vehicle's headlights to be Turned On whenever Windshield Wipers are in use. Yeah - If there's Water on your Windshield, You Gotta Turn on the Lights! If you don't, you can be ticketed. Ohio apparently took note of Sixteen other states -- including nearby Illinois, Pennsylvania and New York who have embraced this "Free" money. This measure was hidden away and passed within the state's transportation budget bill without much fanfare. Could it be that municipalities around the state are hoping that drivers don't know about the new rule so that they can ticket them? Enforcement of this regulation will work like Ohio's seat belt law. Motorists can't be pulled over solely for not activating their lights when water is on the windshield. Drivers can (and will) be ticketed for the violation if stopped for some other offense. (Like the cops couldn't find "Something" pull you over for). Supporters of the rule say there's no arguing the fact that it's easier to spot vehicles in a drizzle or driving rain if they're Illuminated. Opponents say that it is Their car, and They should be responsible for determining when to light it up. Personally, this reporter dislikes the State bulking up the roadway rulebook with yet another ticketing opportunity. A no-headlights-in-the-rain ticket could cost up to $150 - in addition to the Trumped up charge that they pulled you over for. So, Ohio Servicers - Light it up whenever you get in the truck. and give the traffic cop the finger as you go by. The Speaker Jan. 2010 Page 5

Page 6

(Well, I suppose you Could if you had a big enough Crowbar, but its easier without the heatsink.). Now its time to look at that DMD Area and decide what harnesses you have to remove. You COULD remove them all, but the ones running vertically along the Right hand edge of the board are sometimes problematical to Remove & Reinsert without breaking. Excel TV recommends leaving those in place, and removing the harnesses and ribbon along the TOP edge of the DMD board at the top-right corner (Figure 7). This allows you to swing the DMD Board open like a Barn Door hinged on the Right Side. Cont. From Pg. 3

One item of caution is to NOT remove the three screws that are circled in Figure 8. We dont know what misfortune will befall you, but the Samsung Training Manual for this product has Very Large and Very Red Letters spelling out Do Not Touch These Screws Maybe theyre hooked to the 3000 volt line and would fry your fingers - Just Kidding But we wouldnt be surprised to see some alignment problems arise once they are disturbed. If the manufacturer saw fit to warn us about them, who are We to argue? DO NOT REMOVE THESE 3 SCREWS

Fig. 8

As you can see in Figure 9, there is ample room to perform the procedure with the Barn Door Open. The Shield on the Back-Side of the DMD Board has been removed, The 4 Screws in the corners of the DMD PCB have been removed, and the PCB swung open like a door in this view. The DMD Chip that is at the root of the Constellation Effect is that large silver rectangle in the center of Figure 9 and there is an even closer look at it in Figure 10. Its impossible to put this in Upside down, because as you can see in that Fig. 10, there are two rectangular keys on the Left side of this display IC and a circular Key on the Right. The IC Is Socketed Fig. 9 and will plug into the DMD Board. Take care that you dont bend a pin when inserting. Figures 11 & 12 show a photo of the Back Side of this DMD Chip with the hundreds of pins and the socket on the DMD Board into which it fits.

Backside of DLP CHIP

Fig. 10 Fig. 11
From this point on, all that remains is Reassembly which consists of working backwards through the steps just described. I Told you early on that this was not a difficult job. Total Time between 1 & 2 Hours, and once you become proficient, maybe even less. There should be no adjustments required if everything goes well. Just Plug it in Turn it On - Look at a Perfect Picture and Smile!
DLP CHIP Socket on DMD Board Fig. 12

Page 7

Page 8

Triple Play

Hello, Sports Fans Just because the World Series is over, doesnt mean that you cant be caught in a Triple Play. For those of us in Cleveland, Thats as close to real Baseball that were going to get for a while!

BY: Dizzy Dean

And then, if youre REALLY Desperate, you could check a Third Tips database this one on the Tech-Assist Service Forum. That made me wish that I had done this in reverse order because There on Tech-Assist, I Struck Gold! NesdaOHIO and Tech-Assist have entered into a Handshaking agreement to allow the easy exchange of information between our members. The Tech-Assist database had an entry by our friend and nesdaOHIO member Jim Knoble to check for R3614 and D3614. With the aid of the Service manual supplied by Toshiba, I was able to locate those 2 parts under the shield beneath the Flyback. The Resistor was easy to spot, since it looked as though it had been overheated but the Diode checked Good. I replaced the resistor, expecting a cure, but was surprised to discover that it still generated enough heat to fry some Ball Park Franks. Dare I say that this was a Foul Tip? My Jaundiced eye fell again on that Diode a 33v Zener , especially since Jim had mentioned it by name (errNumber), So I unsoldered it and ran it over to the Bench Power Supply for a test. Sure enough, although the diode checked Good when it had only the couple volts from a meter across it, It was breaking down Under Load. A New Zener installed in the Set, and I was ready to swing the Bat Again. That was No Foul Tip! Although I missed the ball when I replaced Only the resistor, I Hit a Homer when I replaced BOTH of the parts in Jims Tip. The Power came up with a Crackle of High Voltage, and I swear I could hear the cheering of the Crowd. Later, After the game, I looked through the schematic and saw that the D3614 zener and the R3614 resistor were in the 33v line to the Tuner. Hidden away as they were underneath that shield, I suspect that it would have taken me a long time to find those by myself. I Still have trouble figuring out why the loss of the 33v TUNER line would kill the entire set, but then, I probably shouldnt Think too much about it. To Paraphrase Yogi Berra 90% of the repair game is Half Mental. Double Header today, see second game on Pg. 10

This Toshiba TV/ VCR/DVD Triple Play bunted its way into the repair shop on Mayfield Road in one of Clevelands eastern suburbs. The model MW20FM1 really Legged it out because it was exhausted when it arrived on base and collapsed right then and there. It was Dead! Dead as a Dropped Ball Dead as last innings stats Dead as any hopes for a playoff berth You get the idea. So, WHERE to begin on this Dead Ball? When you remove the back, all you see is one PCB on top of a large shielded area! The entire VCR and DVD areas are covered with Sheet Metal and there are MORE boards under them. Is this a Paininnyass Or What ! Dont you just wish you could get the guy who designed things like this in a locked room for 5 Minutes? Maybe then theyd start building things to be Serviceable. ( once his hands and kneecaps healed) I Like most of YOU started on the Top PCB. The one exposed and sitting on top of the shields. It had the Flyback, The AC Cord, A bunch of Diodes, So youd figure that this was the TV & Power Supply Board, and that this would be a good place to start. If you thought That, then youd be just as wrong as I was after I checked the Horiz. Output Transistor, Power Diodes, Fuses, Fusible Resistors, etc on that board, and found them to all be good. Maybe Then you would notice that there are a couple of wires running from the AC Area of that board to down under that Shield it is sitting on. You might dismiss this as being irrelevant, since that is the VCR & DVD area, and surely THAT couldnt have anything to do with a dead set could it? Fortunately for us servicers, TOSHIBA is one of the more enlightened manufacturers who allow access to their schematics via the link on the nesda (national) web-site. I downloaded that service manual just as fast as my little DSL wires would let me and was glad to get it! Ive got to say that it is a pretty Busy schematic with Power boards spread across 3 separate pages. Nevertheless, it is certainly a help to have this information at my fingertips. Thanks Toshiba! So there you are, sitting in the Dugout, scratching your head and wondering if you should waste your time taking those shields off to go hunting. Before doing all that disassembly, perhaps you should check the nesda Online Tech-Mate database (nothing there on this model) or you could check WinTips (nothing there, either but I havent bought that expensive

update lately)

D3614 R3614

Page 9

Triple Play Double Header
Well, Whaddya think o That, Sports Fans TWO players from the same team come into the Trainers room here at the Stadium in South Euclid, Ohio. They each got different ailments, but still What are the odds of Two of the same guys coming in within a couple days o each other?

BY: Lou Boudreau

than it takes Bob Feller to whiff a batter. That wasnt the case Here, though. Following the change of pitchers err I mean ICs the same symptom remained. Still Folded over at the Top! Well, its time to call for a Pinch Hitter, and that Good Ol Boy Dick Smith made his appearance in the line-up. Ol Dick swung at a couple of 400 Series capacitors near the Vertical IC and ran up the count. Finally, he took a mighty punch at C427 and made a hit way out into Left Field Yes, C427 is way out in the far Field (Front Edge) of the PCB faded over to the Left.
The Outfielder couldnt handle it and after all was said and done, C427 was the Big Hit of the day. The picture returned to normal and a cheer went up from the thousands in their seats including the owner, who placed this right in front of his Barcalounger. This capacitor was added to the stats because a search of the nesda Online Tech-Mate database, Tech-Assist, or WinTips didnt have this listed. Im sure they do Now, because the teams statistician added them to the two Ts, and when the Harvesters read this, Im sure itll be placed in the W column as well. Later, After the game, I looked through the schematic for a second time and saw that C427 is the Pump Up Capacitor. I wondered why it is so far out in left field. Usually, the Pump-Up Cap is located in close proximity to the Vertical IC but not in this Ball Park. It just goes to show you that You can observe a lot by watching (to quote Ol Yogi Berra)
This Second Toshiba TV/VCR/DVD Triple Play within a week walked its way into the repair shop on Mayfield Road in one of Clevelands eastern suburbs. The model MW20FM1 Seemed in Pretty Decent shape, but it did seem to be stretched a bit. Yeah, The Top Few Inches of the Picture were Stretched, and Folded Over Maybe he had been training too hard, but he surely needed the attentions of a doctor right now. The Good news is that the Deflection area is on the PCB is mounted on top of a large shielded area! The entire VCR and DVD areas are covered with Sheet Metal and there are more PCBs hidden underneath, but we didnt need to go into those areas. That would likely take us into extra innings if we had to remove all that sheet metal, and we were in a hurry because the clock was running out. It was time for the Two Minute Drill ! There is a LA78041 Vertical IC (IC401) mounted on a Heatsink on that Top PCB, and since that is a known problem item, it was decided to try to shortcut this business and just change IT first. Its only 7 leads and changes pretty quick and in a lot of cases you are in & done in less time

Page 10

Why is it called 7 Anyways?
BY: Speaker Staff Writer Shamelessly Stolen from www.worldstart.com and edited locally. You may have heard of the New "Windows 7" rolled out in October '07. This is supposed to be the replacement for Vista, and the question presents itself: " Why is it called Windows 7? With so many different versions of Windows the Program and version numbers don't match up quite the way that you would think that they would. I mean, We've had Windows 3.0, 3.1, 95, 98 (revisions A and B), 2000, ME, XP, Vista and that's not even counting Windows NT, and the Mobile iterations! I probably even forgot a version or two in there somewhere! So why exactly does MS see fit to name it 7? According to the Inter-net these were the previous versions of Windows, and Microsoft's thinking behind naming it #7: Windows 3.0 and 3.1 (and Windows for Workgroups 3.11) from the early 1990s were the first version of windows and used the version numbers as part of their name. The first releases of Windows NT, also from that era, followed suit, with Windows NT 3.1 and 3.5. Windows 95 Broke with that and used a NAME instead of a number. "Windows 95" was technically Windows version 4.0. Windows NT 4.0, which was released exactly a year after Windows 95, adopted the Windows 95 interface. Windows 98 was version 4.10.1998 and Windows 98 Second Edition was 4.10.2222A. The
much-maligned Windows Me was 4.90.3000. Windows 2000 was the first release in the version 5 family. It was followed by Windows XP, which was version 5.1. Service packs are identified by build numbers as in "SP1" or "SP2", but service packs do not affect the version number. Windows Vista was Windows 6.0. Because the next (October '09) release of Windows was based on the same kernel as Windows Vista, it should have the version number 6.1 instead of "Windows 7". Indeed, every screenshot of Windows 7 that has been in public view so far has had a build number of 6.1.xxxx. This numbering is almost certain to remain in the final product. This may cause a problem If they change the major version number to 7.0. Many applications written for Windows Vista would fail to install or run properly, simply because of "version checking" performed during the program's startup. In summation, there is no good reason to call it Windows 7 at all! There are predictions on the Inter-net that Microsoft will probably go back to their old "no numbers" naming convention for the next version, but who wants to even think about that right now? When queried, The Speaker's "Computer Illiterate" stated that he was hoping that they would go back to the Commodore 64 system.

Answer to CET Teaser on Pg. 5 Number 1. The AM signal radiates one effective sideband pair which is determined by the frequency of the audio modulating signal. If the audio modulation is 3 kHz the upper sideband will be 3kHz higher than the channel frequency while the lower sideband will be 3 kHz below. If there is no modulation there will be no sidebands generated.

www.pacparts.com

The Speaker Jan. 2010 Page 11
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