caramoan tour package

caramoan tour package

Author Topic: Sony trinitron kv-21r22c  (Read 481 times)

Offline nympha

  • Size C Battery
  • *****
  • Posts: 226
  • Pogi/Ganda Points: 6
  • nympha
Sony trinitron kv-21r22c
« on: May 05, 2012, 12:02:01 AM »
Gud p.m po mga sis. Pinagpupuyatan ko po tong pinaparepair saking tv.

Problem: Kalahati lang nung image ang nakikita, ung upperside lng po, ung kalahati naman eh blak lng, pakiimagine nlng po hniram po kasi card reader ko ;D

*nwei pinalitan ko na po ung vertical ic(LA7830)  taz chinek ko na din po lahat ng ecaps connected sa vert. (gamit ung LCR + ESR ni sir kasamiko) ok naman po lahat,, nagvoltage cheking na din po ako sa supply nung vert. ic,,, no luck parin po ganun pa din,,

anu po kaya problema mga sis?? pahlp po mga masters  ???
"The truth of a theory is in your mind, not in your eyes."

Philippine Electronics Forum

Sony trinitron kv-21r22c
« on: May 05, 2012, 12:02:01 AM »

Offline Min

  • Diesel Generator
  • *
  • Posts: 1506
  • Pogi/Ganda Points: 212
  • Gender: Male
Re: Sony trinitron kv-21r22c
« Reply #1 on: May 05, 2012, 07:36:06 AM »
Sir anu jungle IC nito? CXA1464AS ba?
M I N 2 5  e l e c t r o n i c s

Philippine Electronics Forum

Re: Sony trinitron kv-21r22c
« Reply #1 on: May 05, 2012, 07:36:06 AM »

Offline mcleod

  • Diesel Generator
  • *
  • Posts: 1167
  • Pogi/Ganda Points: 143
  • Gender: Female
Re: Sony trinitron kv-21r22c
« Reply #2 on: May 05, 2012, 02:37:50 PM »
Gud p.m po mga sis. Pinagpupuyatan ko po tong pinaparepair saking tv.

Problem: Kalahati lang nung image ang nakikita, ung upperside lng po, ung kalahati naman eh blak lng, pakiimagine nlng po hniram po kasi card reader ko ;D

*nwei pinalitan ko na po ung vertical ic(LA7830)  taz chinek ko na din po lahat ng ecaps connected sa vert. (gamit ung LCR + ESR ni sir kasamiko) ok naman po lahat,, nagvoltage cheking na din po ako sa supply nung vert. ic,,, no luck parin po ganun pa din,,

anu po kaya problema mga sis?? pahlp po mga masters  ???

ano ba nasukat mo voltage sa vertical ic? bakit ecaps lang check mo wala bang resistors and diode or inductor/coils yan? may ESR meter ka eh di sana nagcheck ka na rin sa near sa FBT and HOT for Horizontal Section. saka dinaan mo na din main ic mo. ano pa gamit bukod sa LA7830?
What makes you think, we owe you an answer? Ask and you shall receive... but all in the proper time.

Philippine Electronics Forum

Re: Sony trinitron kv-21r22c
« Reply #2 on: May 05, 2012, 02:37:50 PM »

Offline nympha

  • Size C Battery
  • *****
  • Posts: 226
  • Pogi/Ganda Points: 6
  • nympha
Re: Sony trinitron kv-21r22c
« Reply #3 on: May 07, 2012, 12:07:54 AM »
Quote
Sir anu jungle IC nito? CXA1464AS ba?

*CXA1870S po

ano ba nasukat mo voltage sa vertical ic?
*wala akong masukat sa suply ng vert ic,, trinace ko xa eh connected xa sa isa pang ic(4558)
>>ung 4558 na op-amp ay may supply na 10v, ok lng ba to, pero wala akong masukat sa output nya,, eto po ang hinala ko, try ko bumili bukas


bakit ecaps lang check mo wala bang resistors and diode or inductor/coils yan?
*chinek ko din lhat ng components related sa vert. section, ok nmn lhat

may ESR meter ka eh di sana nagcheck ka na rin sa near sa FBT and HOT for Horizontal Section. saka dinaan mo na din main ic mo. ano pa gamit bukod sa LA7830?

*meh
"The truth of a theory is in your mind, not in your eyes."

Philippine Electronics Forum

Re: Sony trinitron kv-21r22c
« Reply #3 on: May 07, 2012, 12:07:54 AM »

Offline MX45

  • Gas Turbine
  • **
  • Posts: 2517
  • Pogi/Ganda Points: 237
  • Gender: Male
Re: Sony trinitron kv-21r22c
« Reply #4 on: May 07, 2012, 10:42:39 AM »
*CXA1870S po

ano ba nasukat mo voltage sa vertical ic?
*wala akong masukat sa suply ng vert ic,, trinace ko xa eh connected xa sa isa pang ic(4558)
>>ung 4558 na op-amp ay may supply na 10v, ok lng ba to, pero wala akong masukat sa output nya,, eto po ang hinala ko, try ko bumili bukas


bakit ecaps lang check mo wala bang resistors and diode or inductor/coils yan?
*chinek ko din lhat ng components related sa vert. section, ok nmn lhat

may ESR meter ka eh di sana nagcheck ka na rin sa near sa FBT and HOT for Horizontal Section. saka dinaan mo na din main ic mo. ano pa gamit bukod sa LA7830?

*meh


check mo yung supply ng Vertical 24VDC galing Flyback, at actual palit ka narin ng ecap dyan, check Didode at resistor.
yung 4558 opamp hwag mo na galawin yan sa pin amp yan.
Gawin mo ang nais mo, sundin mo ang gusto mo dahil ikaw o ang sarili mo ang hari ng yung kagustuhan...

Philippine Electronics Forum

Re: Sony trinitron kv-21r22c
« Reply #4 on: May 07, 2012, 10:42:39 AM »

Offline nympha

  • Size C Battery
  • *****
  • Posts: 226
  • Pogi/Ganda Points: 6
  • nympha
Re: Sony trinitron kv-21r22c
« Reply #5 on: May 07, 2012, 11:18:18 AM »
Code: [Select]
check mo yung supply ng Vertical 24VDC galing Flyback, at actual palit ka narin ng ecap dyan, check Didode at resistor.
yung 4558 opamp hwag mo na galawin yan sa pin amp yan.

ok sir tnx. chinek ko nmn na po lhat ng ecap sa vert. sect. using esr and cap. meter,, ok naman po lahat. diodes resistor ok din naman, pati coil:inductor,,,

>>ang paraan po ng pagchechek ko ng ecap eh base po sa libro ni jestine yong

http://i275.photobucket.com/albums/jj291/xian_19/elab/cap_test.jpg

*low ESR po lhat ng ecaps ko sa vert. sect at tama lhat ng capacitance reading nya,, ung isang test lng ung di ko nagawa(insulation testing). Pero ayon po sa libro nya, sabi dun na 250v and above lng ang pdeng matest under full operating voltage, so ang pinalitan ko lng eh ung ecap na meh 250v.. isa lang naman ang nakita ko, (10uF/250v),, ung susunod dun eh ung sec. cap na 33uF/160v saka ung 400v na primary ecap.
"The truth of a theory is in your mind, not in your eyes."

Offline MX45

  • Gas Turbine
  • **
  • Posts: 2517
  • Pogi/Ganda Points: 237
  • Gender: Male
Re: Sony trinitron kv-21r22c
« Reply #6 on: May 07, 2012, 12:20:40 PM »
Code: [Select]
check mo yung supply ng Vertical 24VDC galing Flyback, at actual palit ka narin ng ecap dyan, check Didode at resistor.
yung 4558 opamp hwag mo na galawin yan sa pin amp yan.

ok sir tnx. chinek ko nmn na po lhat ng ecap sa vert. sect. using esr and cap. meter,, ok naman po lahat. diodes resistor ok din naman, pati coil:inductor,,,

>>ang paraan po ng pagchechek ko ng ecap eh base po sa libro ni jestine yong

http://i275.photobucket.com/albums/jj291/xian_19/elab/cap_test.jpg

*low ESR po lhat ng ecaps ko sa vert. sect at tama lhat ng capacitance reading nya,, ung isang test lng ung di ko nagawa(insulation testing). Pero ayon po sa libro nya, sabi dun na 250v and above lng ang pdeng matest under full operating voltage, so ang pinalitan ko lng eh ung ecap na meh 250v.. isa lang naman ang nakita ko, (10uF/250v),, ung susunod dun eh ung sec. cap na 33uF/160v saka ung 400v na primary ecap.


hindi mo pa sinagot kung ilan ang nameasure mong supply voltages ng Vertical.
Gawin mo ang nais mo, sundin mo ang gusto mo dahil ikaw o ang sarili mo ang hari ng yung kagustuhan...

Offline nympha

  • Size C Battery
  • *****
  • Posts: 226
  • Pogi/Ganda Points: 6
  • nympha
Re: Sony trinitron kv-21r22c
« Reply #7 on: May 07, 2012, 12:31:20 PM »
Code: [Select]
hindi mo pa sinagot kung ilan ang nameasure mong supply voltages ng Vertical.
14v. pero mga 3 sec. lang xa taz nawawala ung reading.. anu bang problema paggnun sir?  ???
"The truth of a theory is in your mind, not in your eyes."

Offline pete

  • Solar Power Satellite
  • *****
  • Posts: 6185
  • Pogi/Ganda Points: 776
  • Gender: Male
Re: Sony trinitron kv-21r22c
« Reply #8 on: May 07, 2012, 12:37:45 PM »
check for open resistor near FBT - supply ng vert. .47 ohms

Offline MX45

  • Gas Turbine
  • **
  • Posts: 2517
  • Pogi/Ganda Points: 237
  • Gender: Male
Re: Sony trinitron kv-21r22c
« Reply #9 on: May 07, 2012, 12:49:06 PM »
Code: [Select]
hindi mo pa sinagot kung ilan ang nameasure mong supply voltages ng Vertical.
14v. pero mga 3 sec. lang xa taz nawawala ung reading.. anu bang problema paggnun sir?  ???


paki check mo yung Pin1 ng Vert IC dapat may -13V ka dyan , pin 3&6 +13V, kung wala sundan mo yung line pabalik ng Flyback. at check mo yung sinabi ni master Pete na resistor maaring nag Change value na yon.
Gawin mo ang nais mo, sundin mo ang gusto mo dahil ikaw o ang sarili mo ang hari ng yung kagustuhan...

Offline nympha

  • Size C Battery
  • *****
  • Posts: 226
  • Pogi/Ganda Points: 6
  • nympha
Re: Sony trinitron kv-21r22c
« Reply #10 on: May 07, 2012, 01:11:21 PM »
Code: [Select]
check for open resistor near FBT - supply ng vert. .47 ohms
ok naman po xa master, ndi po xa open.

Code: [Select]
paki check mo yung Pin1 ng Vert IC dapat may -13V ka dyan , pin 3&6 +13V, kung wala sundan mo yung line pabalik ng Flyback. at check mo yung sinabi ni master Pete na resistor maaring nag Change value na yon.
meh 13-14v akong nasusukat master pero after 3sec nawawala po ung reading nya,, anu po bng problema paggnun..  ???
"The truth of a theory is in your mind, not in your eyes."

Offline MX45

  • Gas Turbine
  • **
  • Posts: 2517
  • Pogi/Ganda Points: 237
  • Gender: Male
Re: Sony trinitron kv-21r22c
« Reply #11 on: May 07, 2012, 01:56:55 PM »
saang pin mo na measure to? dapat okay din ang negative supply mo. or try mo alisin muna ang vert IC saka mo measure ang Voltages doon sa mga pin na sinabi ko sa taas.
Gawin mo ang nais mo, sundin mo ang gusto mo dahil ikaw o ang sarili mo ang hari ng yung kagustuhan...

Offline nympha

  • Size C Battery
  • *****
  • Posts: 226
  • Pogi/Ganda Points: 6
  • nympha
Re: Sony trinitron kv-21r22c
« Reply #12 on: May 07, 2012, 08:20:53 PM »
Quote
saang pin mo na measure to? dapat okay din ang negative supply mo. or try mo alisin muna ang vert IC saka mo measure ang Voltages doon sa mga pin na sinabi ko sa taas.

meh nasusukat ako sa  supply ng vertical ic. Ung problema ko ngaun 3 sec. lang xa nameameasure taz nawawala,, ung Secondary voltage ko naman steady xang 120v,,
"The truth of a theory is in your mind, not in your eyes."

Offline mcleod

  • Diesel Generator
  • *
  • Posts: 1167
  • Pogi/Ganda Points: 143
  • Gender: Female
Re: Sony trinitron kv-21r22c
« Reply #13 on: May 07, 2012, 09:52:57 PM »
di ba LA7830 vertical IC mo?

http://pdf1.alldatasheet.com/datasheet-pdf/view/40349/SANYO/LA7830.html


sa pin 2(kung dito nasukat mo at nawawala, baka meron kang cold solder or dry joints; resolder vertical ic pati other components dito) and pin 6 Vcc supply mo (18 - 27 volts good pa normal is 24 volts)
tingnan mo datasheet iyan sa taas. sabi mo half picture di ba, so mas malamang ok ang supply mo sa pin 6; pero sa pin 2 baka hindi, sabi mo ok mga ecaps mo dito sa vertical pero yung diodes and resistor??
What makes you think, we owe you an answer? Ask and you shall receive... but all in the proper time.

Offline nympha

  • Size C Battery
  • *****
  • Posts: 226
  • Pogi/Ganda Points: 6
  • nympha
Re: Sony trinitron kv-21r22c
« Reply #14 on: May 08, 2012, 09:31:13 AM »
Quote
di ba LA7830 vertical IC mo?

http://pdf1.alldatasheet.com/datasheet-pdf/view/40349/SANYO/LA7830.html


sa pin 2(kung dito nasukat mo at nawawala, baka meron kang cold solder or dry joints; resolder vertical ic pati other components dito) and pin 6 Vcc supply mo (18 - 27 volts good pa normal is 24 volts)
tingnan mo datasheet iyan sa taas. sabi mo half picture di ba, so mas malamang ok ang supply mo sa pin 6; pero sa pin 2 baka hindi, sabi mo ok mga ecaps mo dito sa vertical pero yung diodes and resistor??

ok lhat nung diodes saka resistor, ilang beses ko na ding chinek,, ang pinagtataka ko lng 3 sec lng ung supply nya sa vert. ic taz nawawala xa,, ndi kya meh problema dn sa low volt. power supply at insufficient ung pumapasok na boltahe?
"The truth of a theory is in your mind, not in your eyes."

Offline mcleod

  • Diesel Generator
  • *
  • Posts: 1167
  • Pogi/Ganda Points: 143
  • Gender: Female
Re: Sony trinitron kv-21r22c
« Reply #15 on: May 08, 2012, 09:47:05 AM »
ok lhat nung diodes saka resistor, ilang beses ko na ding chinek,, ang pinagtataka ko lng 3 sec lng ung supply nya sa vert. ic taz nawawala xa,, ndi kya meh problema dn sa low volt. power supply at insufficient ung pumapasok na boltahe?

ibig sabihin pagkatapos mag -display ng picture na may fold over, nagshushutdown? ok ang sound? yung regulators mo ba? anong HOT nito, yung orig ba?

sa A/V mode?
What makes you think, we owe you an answer? Ask and you shall receive... but all in the proper time.

Offline mcleod

  • Diesel Generator
  • *
  • Posts: 1167
  • Pogi/Ganda Points: 143
  • Gender: Female
Re: Sony trinitron kv-21r22c
« Reply #16 on: May 08, 2012, 10:12:33 AM »
Kung try mo kaya i-correct sa service mode ng matapos na ito:

Service mode.

1. Standy mode. Press "Display" -> "5" -> Vol+ -> "Power"(sunod sunod)
2. To save: press "Muting" then "enter" (sa remote control)
3. To exit: turn off and turn on.





concentrate on number 2 and 3; assuming wala kang ibang problem sa components.
What makes you think, we owe you an answer? Ask and you shall receive... but all in the proper time.

Offline nucleus

  • Gas Turbine
  • **
  • Posts: 2573
  • Pogi/Ganda Points: 123
  • Gender: Male
Re: Sony trinitron kv-21r22c
« Reply #17 on: May 08, 2012, 10:19:00 AM »
parang di sa vertical ang problema ah? kalahati lang ang pic?

@TS nahati ba yung pic? or nasinsin?
Hi! I'm nucleus and i carry the charge 8)

Hindi ako nandito para makipagkumpitensya kanino man

Offline pete

  • Solar Power Satellite
  • *****
  • Posts: 6185
  • Pogi/Ganda Points: 776
  • Gender: Male
Re: Sony trinitron kv-21r22c
« Reply #18 on: May 08, 2012, 12:05:54 PM »
parang di sa vertical ang problema ah? kalahati lang ang pic?

@TS nahati ba yung pic? or nasinsin?
baka CS lang

Offline nympha

  • Size C Battery
  • *****
  • Posts: 226
  • Pogi/Ganda Points: 6
  • nympha
Re: Sony trinitron kv-21r22c
« Reply #19 on: May 08, 2012, 01:17:57 PM »
Quote
parang di sa vertical ang problema ah? kalahati lang ang pic?

@TS nahati ba yung pic? or nasinsin?

*ndi nahati ung pic pero nagroll xa pababa.. (ung top dapat nung image eh napunta sa gitna nung screen, pakiimagine nalang ;D) taz yung kalahati ay black lang

Quote
Kung try mo kaya i-correct sa service mode ng matapos na ito:

Service mode.

1. Standy mode. Press "Display" -> "5" -> Vol+ -> "Power"(sunod sunod)
2. To save: press "Muting" then "enter" (sa remote control)
3. To exit: turn off and turn on.

*para san po ba to??

Quote
ibig sabihin pagkatapos mag -display ng picture na may fold over, nagshushutdown? ok ang sound? yung regulators mo ba? anong HOT nito, yung orig ba?

sa A/V mode?

Orig pa sir ung hot nya kasi ndi pa naipakita sa iba... actually ung sound po mejo mahina rin ung lumalabas pero sinosolve ko muna ung vert. problem taz sunod ung sound,, related po ba ung 2 sections (vert. at sounds?)


"The truth of a theory is in your mind, not in your eyes."

Philippine Electronics Forum

Re: Sony trinitron kv-21r22c
« Reply #19 on: May 08, 2012, 01:17:57 PM »

 

Privacy Policy

Contact Us: elabph@yahoo.com