HELP: Sanyo 29" TV ST-29AF1 Standby Mode

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HELP: Sanyo 29" TV ST-29AF1 Standby Mode

Post by Lenaren on Mon Dec 03, 2012 9:48 am

Mga master patulong naman... Yung TV namin naka-standby mode na lang.. Nanonood pa kami nun tapos biglang nag-standby.. kahit press yung power sa remote wala pa rin... May problem din ito dati matagal lumabas ang picture nya.. malabo... pero naging OK na rin kahit walang ginawa.. Pinalitan na rin ang OPTO pero wala pa rin as per reading ng mga topics dito at ni-resolder na rin ang board for possible weak solder... Ano kaya problem nito?... Di pa me nag-voltage check baka kasi na-encounter nyo na to para direct replace na lang ng parts.. medyo takot kasi me mag-test.. pale .. newbie lang po..

Model: Sanyo TV 29-AF1
Power IC: STR 81145
H Out: D2580
V Out: LA7841

Paano po pala mag-post ng image dito sa message ko??

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Re: HELP: Sanyo 29" TV ST-29AF1 Standby Mode

Post by ultrasonic™ on Mon Dec 03, 2012 10:23 am

nku dpat wag kang matakot mg voltage check kasi iyan ang isa sa pnglaban mo sa pgrerepair.. iyan kasi ang mgsisilbi mong guide kng saan ka agad tutuon (^_^

btw based on ur statement bka pumapalya ang B+ mo.. kya nhihirapang mg on.. try to check ur secondary filter ecaps.. mostly my value iyan na 100-220uf/160V bka leak iyan... or pwde rin start up capacitor/resistor.. ano pala ang mga major parts nito?
reg ?
system?
jungle?

or chassis # nlng para mas mdali namin matukoy (^_^

btw... regarding sa pgpopost ng image... try mu etong post ko sa kbila

http://aelexian.4rumer.com/t790-sony-trinitron-pa-help

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Re: HELP: Sanyo 29" TV ST-29AF1 Standby Mode

Post by DJFEL on Mon Dec 03, 2012 11:28 am

wang kang matatakot...yan ang pina ka d best yong chik voltage...

sub....secondary section yata to...chik ecap or fusible risistor sa b+ po,x-out den try f ok ba yan..


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Re: HELP: Sanyo 29" TV ST-29AF1 Standby Mode

Post by Lenaren on Mon Dec 03, 2012 12:19 pm

@ Master Ultra.... Sorry po di ko alam kung ano yung jungle, system, ... newbie pa lang po... eto na lang po ang pictures...

C4430 - eto po ba regulator nya?

Pwede po ba pa-locate sa picture yung mga parts na tinanong nyo? Tnx





@ Master DJFel... titingnan ko po...

Thanks sa reply!!!

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Re: HELP: Sanyo 29" TV ST-29AF1 Standby Mode

Post by DJFEL on Mon Dec 03, 2012 1:14 pm

sub para ky sis ultra para sa mga medjor part sa tv..daming picture kong saan naka locate yong parts or mga sis my ron pic dito..

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Re: HELP: Sanyo 29" TV ST-29AF1 Standby Mode

Post by ultrasonic™ on Mon Dec 03, 2012 5:06 pm

sori nwala ako sa airy (^_^ na BZ ng kunti

btw.. parang ka series lng eto ng mga FC1-B chassis..
eto ang link - Chassis FC1-B
DL mu nlng ts to confirm

rgarding sa mga Parts name..
eto tignan mo (^_^



zoom in

my binilugan ako sa maliit na circle sa parteng jungle xtal(crystal). kng exactly 3.58/4.43mhz iyan conclude agad na Jungle ic nga iyan

same with the system ic (bastat ang value ng xtal ay around 4mhz-10mhz

sa H-out nmn di ko masxadong maaninag sa picture na pinost mo kya binilugan ko nlng ng mlaki basta samwhere lng jan ang mlaking tranny yan na un..

ung secondary caps nmn.. makoconfirm mu agad yan pg nasa xxxuf/160v-250v ang workng voltage nyan

xa nga pla my nilagay akng question mark sa right ng image mo..
di ko maaninag ang numero ng ic.. kya di ko msiguro kng automatic sw over from voltage doubler or vice versa ba ang ic na yan.. pero kng str80145 or ka series yan.. ay tiyak yan na yan (^_^

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Re: HELP: Sanyo 29" TV ST-29AF1 Standby Mode

Post by DJFEL on Tue Dec 04, 2012 10:47 am

ultrasonic™ wrote:sori nwala ako sa airy (^_^ na BZ ng kunti

btw.. parang ka series lng eto ng mga FC1-B chassis..
eto ang link - Chassis FC1-B
DL mu nlng ts to confirm

rgarding sa mga Parts name..
eto tignan mo (^_^



zoom in

my binilugan ako sa maliit na circle sa parteng jungle xtal(crystal). kng exactly 3.58/4.43mhz iyan conclude agad na Jungle ic nga iyan

same with the system ic (bastat ang value ng xtal ay around 4mhz-10mhz

sa H-out nmn di ko masxadong maaninag sa picture na pinost mo kya binilugan ko nlng ng mlaki basta samwhere lng jan ang mlaking tranny yan na un..

ung secondary caps nmn.. makoconfirm mu agad yan pg nasa xxxuf/160v-250v ang workng voltage nyan

xa nga pla my nilagay akng question mark sa right ng image mo..
di ko maaninag ang numero ng ic.. kya di ko msiguro kng automatic sw over from voltage doubler or vice versa ba ang ic na yan.. pero kng str80145 or ka series yan.. ay tiyak yan na yan (^_^

eto...maka tolong nato...abang nalang sa apdit..basta alam ko my lick yong risistor nito sa primary...

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Re: HELP: Sanyo 29" TV ST-29AF1 Standby Mode

Post by Lenaren on Tue Dec 04, 2012 4:56 pm

Thanks sa reply... OK na... kaso wala namang display baka bumalik yung dating sakit nito.... pag uminit saka lang makita ung display...

Ung salarin pala kaya naka-standby mode lang ay ung resistor sa primary section.. walang reading.. nahanap ko rin kagabi.. tama si master DJFEL... R620 120K ang pumalya....

Ngayon naman eto ang symptoms nya... pag-on ko may power kaso walang display pero pag pinatay ko may liwanag na lumalabas ... ano ba tamang term nito... Try ko press yung mga controls di rin po makita mga indicators... ano kaya problem nito mga master? ... CRT socket ba ung prob nito?

Di ko na-try na iwang bukas ng matagal kung magkaka-display... Signal no. 2 na kasi dito....

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Re: HELP: Sanyo 29" TV ST-29AF1 Standby Mode

Post by ultrasonic™ on Tue Dec 04, 2012 6:29 pm

oie congratz kng ganun (^_^

pwde nating hatulan agad ang CRT socket or CRT/Picstube
pg nagawa mo ang mga ito:

heater supply (6.4Vac) - ok
g2 (250-400v) - ok
video supply (180V) - ok
ok ang C board at Peripheral parts nito lol!


BTW kng steading umiilaw ang heater filament ng tube mo (puwet ng picstube) like this



ay indikasyon yan na nag-ooscillate ng matino ang FBT mo.. try mu ngyon sukatan ang G2 mo (screen voltage) kng presence ba.. or try to adjust nlng ng padahandahan ang screen pot. baka meron taung maaninag



then balitaan mo kami

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Re: HELP: Sanyo 29" TV ST-29AF1 Standby Mode

Post by Lenaren on Wed Dec 05, 2012 9:35 am

@ Master Ultra... Meron pong ilaw sa filament pero di po sya ganun kaliwanag compare sa ibang tv unit... Pag sinusubukan ko pong i-adjust ung G2 nya may liwanag po sa screen nya na maputi tapos may mga linya na horizontal..

Try ko pong sukatan... pale mga voltage nito...

Master ung ground ba ng tester sa ground chassis ko ilagay pag nag probe ako o sa negative ng main e-cap??

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Re: HELP: Sanyo 29" TV ST-29AF1 Standby Mode

Post by ultrasonic™ on Wed Dec 05, 2012 12:23 pm

tama yan sa cold/chassis ground ka dpat mg ground pg nasa secondary out ka na..



BTW di ko pala nasali sa itaas ang dlawang salarin natu

1. ABL resistor - change value/open
2. RGB out ng Jungle - bka absence dpat meron iyan at almost pantay (vrms 1-3v)

SOP na rin na plitan ang Video caps

Oo nga pla sis... my tunog/sound ba xa ng channel stations?

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Re: HELP: Sanyo 29" TV ST-29AF1 Standby Mode

Post by Lenaren on Wed Dec 05, 2012 12:45 pm

Salamat po sa mabilis na reply!!

Master Ok na po may video display na... kaso wala pong sound.... tapos pag pindutin ko ung mga controls nya hindi nalabas sa screen ung indicators nya... i.e. channel up/dn, volume up/dn, menu, AV/TV... Sinubukan ko po sa dvd merong picture pero walang sound...

Ano pa kaya problem nito?

BTW.. ni-resolder ko lang po ung CRT board nya...
Nag-voltage check po ako sa CRT.. eto po mga reading kaso di ko alam kong anu-ano ang mga to...

150Vdc
23Vdc
23Vdc - eto ung red wire na galing sa FBT papuntang CRT board

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Re: HELP: Sanyo 29" TV ST-29AF1 Standby Mode

Post by ultrasonic™ on Wed Dec 05, 2012 1:20 pm


^ check speaker muna bka open
check RCA cord lalot ang Audio bka my putol o di nkakabit ng maayos lalot nka DVD/AV mode ka

regarding sa sinasabi mung number indicators.. OSD ang proper tawag jan (on-screen display).. try to resolder sa parteng system con lalot ang Xtal....

Lenaren wrote:Salamat po sa mabilis na reply!!
BTW.. ni-resolder ko lang po ung CRT board nya...
Nag-voltage check po ako sa CRT.. eto po mga reading kaso di ko alam kong anu-ano ang mga to...

150Vdc
23Vdc
23Vdc - eto ung red wire na galing sa FBT papuntang CRT board

23v lng ba tlga yang red wire ng FBT (g2/screen) ? msxado xang mababa...

wla bang nka imprinta sa C board like RK, GK, BK, G2, HT & etc... ?
pwde mu ung gawin bases

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Re: HELP: Sanyo 29" TV ST-29AF1 Standby Mode

Post by DJFEL on Wed Dec 05, 2012 4:33 pm

chik mo yong sinabe ky sis ultra...apdit lang olet..

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Re: HELP: Sanyo 29" TV ST-29AF1 Standby Mode

Post by DJFEL on Wed Dec 05, 2012 4:37 pm

parang my open risistor or lick G2 supply..alarohen mo yong paliged nang FBT yong naka connect po sa red wire..parang kapoy sa supply..23v lang yong g2..

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Re: HELP: Sanyo 29" TV ST-29AF1 Standby Mode

Post by Lenaren on Wed Dec 05, 2012 5:48 pm

@Master Ultra.... 23Vdc lang po talaga na measure ko ung red wire patungong CRT board... sa CRT board lang kc me nag-check.... Try ko po resolder ung cnabi nyo..

@Master DJFEL... noted po...

1+ po kayong dalawa... Master Ultra ikaw na pong bahala.. di me alam magbigay ng points...

Daghan Salamat!!!

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Re: HELP: Sanyo 29" TV ST-29AF1 Standby Mode

Post by DJFEL on Thu Dec 06, 2012 9:54 am

okis lang yan..soyod mona sa paliged fbt..chik mo bakit kapoy yong rid wire or chik crt bord...yong risistor pa ponta nang G2..baka my sira..

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Re: HELP: Sanyo 29" TV ST-29AF1 Standby Mode

Post by Lenaren on Thu Dec 06, 2012 10:25 am

Master Ultra wala pong label sa board at wala pa ring OSD... OK naman po ung speaker.. di ko rin po ma try sa tuner kasi di ko makita ung OSD nya... napansin ko rin po na hindi blue ung screen nya.. normally po kasi blue sya dapat kahit wala syang ma-pick-up na channel kung nka-TV mode man o video...

Master DJFEL may idea po ba kayo kung anong mga sizes ng resistor (wattage ba) na nakabit sa G2... faded na po kasi mga color code nya... di ko compare sa actual reading kong may problema ba to or wala....

Merong 2 watts resistor na nakakabit sa 160V/220uF na e-cap dito na ang reading nya ay 350 ohms.. di ko ma-compare kasi faded na rin kulay...

Master meron po ba kayong service diagram nito?


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Re: HELP: Sanyo 29" TV ST-29AF1 Standby Mode

Post by DJFEL on Thu Dec 06, 2012 12:22 pm

Lenaren wrote:Master Ultra wala pong label sa board at wala pa ring OSD... OK naman po ung speaker.. di ko rin po ma try sa tuner kasi di ko makita ung OSD nya... napansin ko rin po na hindi blue ung screen nya.. normally po kasi blue sya dapat kahit wala syang ma-pick-up na channel kung nka-TV mode man o video...

Master DJFEL may idea po ba kayo kung anong mga sizes ng resistor (wattage ba) na nakabit sa G2... faded na po kasi mga color code nya... di ko compare sa actual reading kong may problema ba to or wala....

Merong 2 watts resistor na nakakabit sa 160V/220uF na e-cap dito na ang reading nya ay 350 ohms.. di ko ma-compare kasi faded na rin kulay...

Master meron po ba kayong service diagram nito?


dalawa ba yan 2wtts na yan...wla ko mapa neto sis..baka my ron mga sis naten dito..piro ma 2koy naten yan...350ohms ba yan yong dalawang 2wts yong sa riding mo..CRT bord ba yan...

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Re: HELP: Sanyo 29" TV ST-29AF1 Standby Mode

Post by Lenaren on Thu Dec 06, 2012 9:37 pm

1 lang po master..

BTW may na-pick-up na pong TV station.. malinaw po ung picture... problem na lang ung OSD at audio nya... kahit gamitin ko remote wala rin...

Salamat master... Update ko na lang po kayo ulit...

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Re: HELP: Sanyo 29" TV ST-29AF1 Standby Mode

Post by ultrasonic™ on Fri Dec 07, 2012 2:49 pm

^ hnestly nalito ako sa itaas abwt the screen supply parang naliligaw tau.. pwo disregard nlng cguro natin as long na ok na pala ang video display... Ok na yan ^_^ kaya sa audio at osd nlng tau tutuon

@ts ano ang numero ng sound ic ? LA4270 ba?
kng di alam, nasa left side ng picture mo na binilugan ko ng sound amplifier

V



do the basic nlng muna tau..

check the Vcc supply first kng presence ba lhat.
check the earphone jack bka di nkabalik sa normal (^_^
check speaker bka sunog o putolsa bandang pigtail o wires
disable the mute ckt
float the input pin at hawakan eto "finger method" dpat my ugong o dotdot ng kunti. .or much better kng merong external audio na iinsert ay mas mainam (fm, dvd, mp3 player &etc.)

kng di nmn familiar sa pin config/assignment ng sound ic at wlang diag na hawak.. try to search nlng ang datasheet nya.. ng mapag-aralan (^_^

pa ot: pasenxa na ngyon lng nka OL... nwalan ako ng internet khapon.. dahil dw sa pinsala ni Pablo

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Re: HELP: Sanyo 29" TV ST-29AF1 Standby Mode

Post by Lenaren on Fri Dec 07, 2012 11:23 pm

Sensya na po master... I have no idea ksi kung ano ang normal screen supply nito... Until now ksi master nung lumabas ung video display nya from 23 VDC naging 28 VDC lng ang reading ko...

BTW, eto pala video display nya...



Regarding audio amp... tama po kayo LA4270 ung IC nya... na-download ko na rin po datasheet nito...

noted po....

Mga master anong test po ba ba pwede kong gawin para malaman ko kung sira na memory IC, System IC at Jungle IC ng TV? Direct replacement lang ba o meron pang ibang trick?

Thanks!!!

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Re: HELP: Sanyo 29" TV ST-29AF1 Standby Mode

Post by ultrasonic™ on Tue Dec 11, 2012 2:20 pm

^ pwde mo din e bases sis.. kng nag sesave ba ng data ang eeprom every tym tinuturn off ang unit..

hlimbawa.. nasa channel 69 at nasa volume 7 Very Happy
ang huling settings bago tinurn off ang unit..

tapoz after several hours pg on mo.. ayon na save nga (^_^

pero takenote: defende din yan sa model ng tv
at saka di lng eto ang gawin mung bases kasi meron mga eeprom na pg corrupted tlga ang data ay mgiging useless

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Re: HELP: Sanyo 29" TV ST-29AF1 Standby Mode

Post by DJFEL on Sat Dec 15, 2012 10:55 am

ano apdit neto..abang nalang..

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Re: HELP: Sanyo 29" TV ST-29AF1 Standby Mode

Post by arkin on Mon Dec 17, 2012 1:30 pm

base sa naincounter ko[sony,goldstar]syscon ang nagbibigay ng OSD.

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Re: HELP: Sanyo 29" TV ST-29AF1 Standby Mode

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