Troubleshooting Guidelines

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Re: Troubleshooting Guidelines

Post by st_richard04 on Sat Mar 03, 2012 3:58 pm

"master Ultrasonic" tungkol po ito sa injecting ng signal sa vertical input pakilinaw naman po ang proseso..i hahang ko po ba ang input ng vertical ic saka ko lalagyan ng audio signal, saan po mang gagaling yung audio signal doon po ba sa output ng audio ic sa parehong tv o sa ibang tv po? pakilinaw naman po dahil napakalaki pong tulong ng tip ninyo na ito..salamat master

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Re: Troubleshooting Guidelines

Post by Electro on Sat Mar 03, 2012 5:48 pm


sa akin master st. mp3 player ang gamit ko

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Re: Troubleshooting Guidelines

Post by st_richard04 on Sun Mar 04, 2012 4:27 pm

salamt master electro, newbie po ako di po ako master nakakahiya naman po sa inyo..pakilinaw naman po kung ganun po, pwede po ba halimbawa meron akong fm radio, pwede kong putulin yung wire mula sa audio output papuntang speaker at iyon po ba ang aking iinject sa input ng vertical ic tama po ba? sensya na po

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Re: Troubleshooting Guidelines

Post by kaholito on Mon Jul 16, 2012 9:48 pm

panu po malalaman ung operating freq?pede po ba mkita un sa tester?tulad ko po nagsisimula pa lng mag ipon ng tools.analog tester pa lng gamit ko.next target ko digital ung magandang klase na.

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Re: Troubleshooting Guidelines

Post by ultrasonic™ on Wed Jul 18, 2012 12:58 pm

frequency counter or gamit ka ng sanwa cd800a.

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Re: Troubleshooting Guidelines

Post by kaholito on Wed Jul 18, 2012 4:21 pm

naku mukhang matagal pa bago ako mkabili nito?saka kailangan pang magpaturo ng pagamit nyan.wla p po akong alam sa mga freq.ng bawat ckt.sana turuan nyo po kami.mga master.

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Re: Troubleshooting Guidelines

Post by james on Wed Jul 18, 2012 11:11 pm

galing naman ng mga masters. more more pa po. maraming kaalaman ang napupulot ko dito.

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Re: Troubleshooting Guidelines

Post by ultrasonic™ on Thu Jul 19, 2012 12:09 pm

dito ko nlng ipopost.. pra madaling mabasa

basic procedure kng paano tanggalin ang yoke sa picstube.

1. tanggalin muna ang socket ng Yoke sa main board



2. lagyan nyu muna ng marker guide ang purity magnet. like: lipstick, pentel pen, color paint, ballpen & etc. para kng sakaling nadisarrange ang purity na mgcacause ng out of convergence, bad ang landing ng beam ay ma-aavoid ang possible worse scenario at maibabalik agad

3. loosen the screws ng purity magnet at def yoke.

4. hilahin or tanggalin ang purity magnet papalabas sa neck ng tube.
pag natanggala na

5. isunod naman ang Deflection Yoke...

note: kng matigas tanggalin.. gamit lng kau ng lacquer thinner sa parteng may metal clamp


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Re: Troubleshooting Guidelines

Post by james on Thu Jul 19, 2012 9:32 pm

paano po yung pagpalit ng mismong yoke?

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Re: Troubleshooting Guidelines

Post by kaholito on Sat Jul 28, 2012 8:11 pm

saka paano po mai aalign uli ung purity magnet pag nagulo?kung nkalimutang lagyan ng mark.

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Re: Troubleshooting Guidelines

Post by ultrasonic™ on Mon Jul 30, 2012 8:41 pm

james wrote:paano po yung pagpalit ng mismong yoke?

do you mean na yung coil nya mismu ang babaklasin para i rewind ?
nku di na yan belong sa basic Very Happy needed na jan na my experience kau khit kunti sa rewinding like pgrerewind ng xformer. pg my tym ako gawan ko yan ng tutorial


kaholito wrote:saka paano po mai aalign uli ung purity magnet pag nagulo?kung nkalimutang lagyan ng mark.

kng meron kaung ntsc color bar & Pattern generator mas madali xa sis... it very Useful for check and adjust convergence, linearity and pin cushion effects. kumpleto yan sa rekados from NTSC, PAL-N and PAL-M modes, Crosshatch white, White center cross, Dots white, Solid White, Red, Green, Blue screens. Chroma and Luminance on/off, Video output: 0...1 Vpp (BNC) with level adjust. RF channels output 2, 3, 4, 5 by switch. Composite RF signal: 10 mV in 75 ohm (BNC), Sub-carrier out (BNC), Sync out (BNC).

medjo my kamahalan nga lng ang equipment na yan.. kya minsan dvd player nlng ang gnagamit..

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Re: Troubleshooting Guidelines

Post by bjohn7908 on Thu Aug 02, 2012 9:43 am

master, ano po ba ang possibleng resulta kung ma dis allign yung purity maget?

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Re: Troubleshooting Guidelines

Post by triac on Thu Aug 02, 2012 10:01 am

sir bjohn,maapetokhan yung color nya..discoloration problem na yan at saka ang hirap ibalik nyan kya dapat may markings ka bago e pull out yung yoke coil..

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Re: Troubleshooting Guidelines

Post by ultrasonic™ on Fri Aug 03, 2012 4:51 pm

agreed.. bali ganito ang common na appearance na maaaninag. aware lng na pwde din na effect yan ng failure ng degaussing ckt. mapoprove mu lng yan pg denigauss mu.. at ayaw pa rin mwala ay cause nga yan ng convergence o disalign ang def yoke





ito nmng pngalawa ay cause din ng disalignning ng purity magnet
kng ngrerepair kau ng projection tv tiyak maeencounter mu yan pero madalas cause na yan ng defective convergence ic


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Re: Troubleshooting Guidelines

Post by bjohn7908 on Sat Aug 04, 2012 3:48 pm

ahh ic mga master naiintindihan ko. ahm ang dis allignining po ng purity magnet po ba ay possible reng reason ng minsan nmamtay bigla and tv? pacnxa sa mga question ko mga master ha? hehe

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Re: Troubleshooting Guidelines

Post by kaholito on Sat Aug 04, 2012 8:44 pm

pag mataas ang screen namamatay ang tv di po ba?ano po ba ang tamang voltage ng screen?un po ba ung g2?ung heater g1?ac voltage po ba ang pangsukat dun?

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Re: Troubleshooting Guidelines

Post by james on Sun Aug 05, 2012 11:00 pm

paano naman kapag parang may naiiwan na liwanag after a scene na maliwanag. Or parang nakaguhit na from left to right na maliwanag na line?

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Re: Troubleshooting Guidelines

Post by Oscar on Mon Aug 06, 2012 6:44 pm

master james baka scanning line yan. epekto iyan na mataas ang supply sa screen. adjust niyo pababa ang adjustment screen ng flybak ng mawala ang mga linya. kong hindi siya mawala master pwede may short sa crt board

master kaholito sa aking openyon nasa 200 hanggang 350 ang madalas kong masukat sa umaandar na na mga tv

master bjohn parang hindi yata apektado kong mali ang purity

master ultrasonic tuloy tuloy niyo po ang pagtuturo niyo


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Re: Troubleshooting Guidelines

Post by ultrasonic™ on Wed Aug 08, 2012 1:55 pm

agreed agreed.

mg-aapear ang scanning lines or retrace line sa faceplate ng tube pg over screen voltage kau (g2)..



pwde nyu munang subukan e-adjust padahandahan ang screen trimmer pot ng FBT pa counter clock wise para bumaba ang G2 supply. at tignan ang faceplate ng tube kng maaaninag pa ba ang linings.



kng my scenario nmn di mwla ang linings
sundin lng oscar.. mlaman my shorted nga sa c board o mismung picstube ang shorted.

@car tuloy tuloy ka jan.. tulungan nyu kng mgpost din dito

@kaholito sundan lng si car. jan nga nglalaro ang g2 supply
defende na rin sa modelo ng unit. meron kasing mga sony model na abot hanggang 600V

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Re: Troubleshooting Guidelines

Post by Oscar on Wed Aug 22, 2012 7:16 pm


galing mo talaga master. madali talagang maintindihan kapag may picture

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Re: Troubleshooting Guidelines

Post by jojogreg on Wed Oct 03, 2012 6:20 pm

Hulog kayo talga ng langit mga mAster sa katulad naming mga newbies sa repair ng TV..Sa kawang gawa na ginagawa nyo marami kayong matutulongan na technician to be mga kababayan natin maging future technician sa bayan eto..mabuhay kayo...+ 100 lahat kayo..

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Re: Troubleshooting Guidelines

Post by james on Wed Oct 17, 2012 6:28 pm

contribute n po mga sir para sa aming mga baguhan at mga nag-aaral lang dahil nakahiligan.

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Re: Troubleshooting Guidelines

Post by dodongleo on Mon Oct 29, 2012 11:30 am

up ko to,,vertical section naman mga sis,,

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Re: Troubleshooting Guidelines

Post by ultrasonic™ on Tue Oct 30, 2012 4:09 pm

@car mgaling ka jan.. eh still ng-aaral pa nga tau..
@jojogreg share share lng tayo sis.. matototo ako at matototo din kau
@dodongleo backread lng kau my post ako sa page1
@all tnx sa mga points

on topic:

identifying major parts nman tau sa board ng TV without using Svc manuals or Diagram Smile
sa mga ngsisimula pa lng sa repair at wlang internet na laging gabay, mas mainam na basahin ang pgkaka arrange ng mga parts o intindihin ang bawat purpose ng electronic components

lipat ko eto dito galing pa sa Elab.. courtesy of master brian


zoom in

1] Speaker
2] Yoke
3] Video Amplifier
4] CRT Socket
5] High Voltage Section or The HOT section
6] Bridge Diode
7] Power Regulator
8] Audio Amp [green square] Audio Section
9] Tuner
10] Flyback
11] Chopper
12] EEPROM [ Memory IC]
13] Vertical
14] Horizontal


regarding nga pala sa video amplifier.. pg wla kaung mhanap na video amplifier ic sa C board ay wag kaung mbahala.. kasi mostly sa mga TV ay transistorize pa ang gamit.. hanapin nyu lng ang tatlot RGB tranny at yun na yun...

sa mga Power Regulator naman ay wag din malito... kng di nyu familiar ang mga Parts number at gusto nyu lng tlgang alamin kng yun na ba ang Power Reg.. ay madali lng... hanapin nyu lng ang Parts na nka Heatsink(Aluminum Attach) na pnakamalapit sa Primary/Main Capacitor (pnakamalakng Ecaps sa Board) pgnahanap nyu na ay yun na ang Power Reg nyu.. mostly Transistorize o IC type ito like STRGxxxx, STRSxxxx, STRFxxxx, STRxxxxx & etc... pg meron nman pnakamlapit na dip ic sa Power Reg ay iyon naman ang PWM niyo (power management/controller ic).

tungkol nmn sa Sound IC..wag kaung mlito sa vertical ic lalot kng pareho silang SIP package.. ang gawin nyu lng reference kng saang nkakabit ang Speaker nyu.. yun ang Sound IC nyu... at kng saan nmn nkakabit yun Vertical Yoke coil nyu ay yun ang Vertical IC nyu...

now regarding din nmn sa EEPROM or Memory ic.. tandaan nyu lng na pnakamlapit xa sa System Controller IC.. na my value na 24Cxx series



kya wag kaung malito sa Pincushion IC lalot 8 pin DIP din ito.. kdalasan numero ng mga pincushion ay 4558D & etc..

sa Jungel/Chroma ic naman ay minsan din ay nalilito kasi pareho silang mhahabang DIP ic... minsan npagpapalit ang dlawang ito lalot sa mga di pa masxadong familiar ang tv... ang maipapayo ko lng ay pwde nyung gawing reference ang crystal (xtal). hnapin nyu lng ang 3.58 o di kaya 4.43mhz kng ano ang pnakamalapit na ic ay iyon ang Chroma ic nyu.. o pwde nyu din sundan ang mga wires patungong C board.. pabalik sa main board.. yung system con nman ay my crystal(xtal) na nglalaro sa 8mhz-12mhz defende na rin sa TV model at designs

Now, kng nag iisa nmn ang mahabang IC sa Board ng TV.. ay UOC na yan (ultimate one Chip) pnagsama ang System con at Jungle/chrome sa iisang package

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Re: Troubleshooting Guidelines

Post by dodongleo on Tue Oct 30, 2012 5:23 pm

additional knowledge na naman para sa aming mga starters,,maraming salamat sis ultra,,hintay for more topics to come,,+1 ka sis,,

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Re: Troubleshooting Guidelines

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