TV repair, monitor repair etc..

[Ate Shey]

Post kayo dito if you need some help in troubleshooting defective analog devices or if you want to share your knownledge in troubleshooting defective devices. 

[marcangel]

hello mga sirs I'm an electronics tech graduate at TUP.  I am trying to repair this TV. Kolin (KC-21CS5). The problem is there is no B+ that's going to the Flyback transformer.  I tried to look for a manual for this brand in Quiapo but to no avail. Can you help me?

[marcangel]

sir di pala manual este diagram pala. sensya n po. thanks.

[wheeler]

check mo muna ang caps 100uf/160 volts kung may bolatahe.pag meron check resistor papunta sa B+ ng flyback mo......btw may stanby voltage ba?

[maldyx]

Hi mga sir. Help naman po sa monitor ko kc nag fiflick sya. Ano po kayang part ung kelangan palitan?

[lardy]

Hello Guys, Got a Sony 29 inch Wega, no power, only timer indicator is blinking. I think its the power supply but I like to hear your ideas and comments about the problem before i open the set. Thanks and God bless you all.
lardy

[wheeler]

tanong ko lang po kung ilang blinks ang sony wega..maybe i can help.

[lardy]

re. 29 inch Wega TV
thanks, continous 'po 'yung blinking, pag switched on.

[wheeler]

Sony Blinking Codes
Many of the later model Sony TV's have a built in Self- Diagnosis function. If
the timer/standby indicator is blinking, this could be an indication of the
problem with the unit. The diagnostic blinking will occur automatically with no
action required by you to engage it.
The timing of the blinking you see would be as follows: two to eight blinks
(depending on the fault) about a third of a second apart, then pauses for 3
seconds, then the two to eight blinks about a third of a second apart again.
Here is a list of the problems that might have occurred indicated by the
number of blinks. The words in parentheses are those which you will see for
each of these faults on a diagnosis screen described later in this article.
Unit is dead and there are no blinks---Problem in the standby power
section. Might check fuse, R607, Q601, IC601, R612 and VDR601 (should
show open)
Continuous Blink Once A Second, No Pausing As Discussed Above---
No reply from the jungle IC301 (data bus is busy, shorted to ground or held
high), IK video path is defective.
ONE Blink--- not used for the self-diagnosis
TWO Blinks---B+ over current protection (OCP) , unit goes to the standby
mode then displays the 2 blink fault. Could be a short in the power supply of
any of the circuits.
THREE Blinks---B+ over voltage protection (OVP), unit goes to the standby
mode then displays the 3 blink fault. This is also a problem in the power
supply circuit, check T603 and R672.
FOUR Blinks---No Vert. Deflection (V STOP), Screen goes to a single
horizontal line then the video signal muted. Check IC1509, Q1505
FIVE Blinks---AKB circuit (AKB), the timer/standby indicator blinks for about
30 seconds then goes to the self-diagnosis function. Something is wrong with
the video. Check video out, Q705, 732, 761 and other components on the C
board, also check Q218, 219, 220 on the A board. Also unit be in IK blanking,
try turning up screen slightly.
SIX Blinks---No Horizontal (H STOP), no raster, goes to the blinking selfdiagnosis
function immediately. Check C515 & 516 and the jungle IC, IC206.
SEVEN Blinks---High voltage shutdown. The high voltage has exceeded 33k
and the unit goes immediately into safety shutdown. Check power supply
regulation and horizontal circuits.
EIGHT Blinks---Problem with the audio (AUDIO), unit goes to standby and
blinks the self-diagnosis code. Check IC406 audio amp, PS401 and 402.
Intermittent problems ?? This is a great feature. You can also bring up
these fault codes ON-SCREEN to see a list of the problem numbers with the
abbreviation of the problem and the number of times this problem has
occurred. This is slightly different than entering the service mode. To see the
diagnostic screen, Press the following buttons:
Display, Channel, 5, Vol Minus, ( Not plus ) then Power. This brings up
a screen with a list of the problems and number of times they have occurred.
Each of the problem names is abbreviated as, "OCP", "OVP", "V STOP", ETC.
We have repeated them in parentheses in the text for the "Blinks" described
above so you can correlate between the diagnostic screen and the blink
codes.
So, now that you know about these self-diagnostics, how do you use them?
Say that you have a set with a black screen. You see that the LED is blinking
4 times....This would tell you that you have no vertical and that is why the
video is muted. If it was blinking 6 times, you would know that you have a
horizontal fault.
It's not a sure cure, but it's a little better than a poke in the eye with a sharp
stick.
IMPORTANT: after you repair the unit, PLEASE clear the values on this
diagnostic screen. These codes do not reset themselves after the fault is
corrected, so if you don't clear them, you'll be seeing "old" fault codes the
next time you enter this screen.
Clearing is done by going into the service mode ( display, channel, 5,
volume plus, then power ) then press 8 and Enter, which of course returns
everything to the factory preset condition.

[Kasamiko]

hey guys...we're messing the thread..

Pls CREATE/START another thread about your queries/problems...

masasapawan na kasi thread ng thread starter..

[Kasamiko]

hello mga sirs I'm an electronics tech graduate at TUP.  I am trying to repair this TV. Kolin (KC-21CS5). The problem is there is no B+ that's going to the Flyback transformer.  I tried to look for a manual for this brand in Quiapo but to no avail. Can you help me?

Can you confirm na my standby voltage? usually 5vdc..may led/pilot lights ba na on? or to check..used your VOM to monitor the presence of +5vdc sa supply ng remote receiver..

check also if hindi shorted yung HOut transistor mo which might cause the shutdown ng secondary power supply

[Kaizer03]

mga sirs patulong naman po bout sa TV, kahit medjo OT kasi monitor to, tutal ang pinagkaiba naman ng tv sa monitor ay yung tuners eh..

di po talaga kasi ako makahanap sa net ng definitions as well as operations ng:

1. Synchro-guide
2. Synchro-phase
3. Synchro-lock

bukas na po ito

TIA

tnx tnx tnx

[Siramiko]

mga sirs patulong naman po bout sa TV, kahit medjo OT kasi monitor to, tutal ang pinagkaiba naman ng tv sa monitor ay yung tuners eh..

di po talaga kasi ako makahanap sa net ng definitions as well as operations ng:

1. Synchro-guide
2. Synchro-phase
3. Synchro-lock

bukas na po ito

TIA

tnx tnx tnx

baka makatulong sayo http://www.seanet.com/~bradford/ntscvideo.html

[Kaizer03]

I'm an electronics tech graduate at TUP.

wow TUPian here also kaso 2nd year pa lang

[electronic repairer]

Gud pm mga bosing!

     Ask lang lan gako bout sa Monitor ko everytime i kabit so sa likod ung signal cable na o-off yung monitor.,i check already the signal cable ok naman continuity nya...sana matulungan nyo ako dito mga bossing.


thanks

[Dennis]

Check mo Vcard madalas mangyari sakin yan

[raul]

gandang araw mga boosing

may problema ako sa monitor ko. may gap cya sa gilid mga 2 inch black and then ung display niya pag maka boot na sa xp desktop may parang gap parang vertical na lines. ples help

[electronic repairer]

Mga bossing good day!

   Patulong naman dito sa monitor ko..when i turn on lahat lang ng LED nakaturn on din...anu kaya sira nito..LG Studioworks 454V ang monitor ko.

thanks in advance

[Siramiko]

Mga bossing good day!

   Patulong naman dito sa monitor ko..when i turn on lahat lang ng LED nakaturn on din...anu kaya sira nito..LG Studioworks 454V ang monitor ko.

thanks in advance

try mo yung windows xp "F8" gamitin mo yung "VGA mode" tapos pag i-lower mo ang resolution 800x600 tapos reboot mo uli ng normal  nangyari na kasi ito sa aoc monitor hindi ko lang alam kung pwede sa LG

[mackyboy]

Sony Blinking Codes
Many of the later model Sony TV's have a built in Self- Diagnosis function. If
the timer/standby indicator is blinking, this could be an indication of the
problem with the unit. The diagnostic blinking will occur automatically with no
action required by you to engage it.
The timing of the blinking you see would be as follows: two to eight blinks
(depending on the fault) about a third of a second apart, then pauses for 3
seconds, then the two to eight blinks about a third of a second apart again.
Here is a list of the problems that might have occurred indicated by the
number of blinks. The words in parentheses are those which you will see for
each of these faults on a diagnosis screen described later in this article.
Unit is dead and there are no blinks---Problem in the standby power
section. Might check fuse, R607, Q601, IC601, R612 and VDR601 (should
show open)
Continuous Blink Once A Second, No Pausing As Discussed Above---
No reply from the jungle IC301 (data bus is busy, shorted to ground or held
high), IK video path is defective.
ONE Blink--- not used for the self-diagnosis
TWO Blinks---B+ over current protection (OCP) , unit goes to the standby
mode then displays the 2 blink fault. Could be a short in the power supply of
any of the circuits.
THREE Blinks---B+ over voltage protection (OVP), unit goes to the standby
mode then displays the 3 blink fault. This is also a problem in the power
supply circuit, check T603 and R672.
FOUR Blinks---No Vert. Deflection (V STOP), Screen goes to a single
horizontal line then the video signal muted. Check IC1509, Q1505
FIVE Blinks---AKB circuit (AKB), the timer/standby indicator blinks for about
30 seconds then goes to the self-diagnosis function. Something is wrong with
the video. Check video out, Q705, 732, 761 and other components on the C
board, also check Q218, 219, 220 on the A board. Also unit be in IK blanking,
try turning up screen slightly.
SIX Blinks---No Horizontal (H STOP), no raster, goes to the blinking selfdiagnosis
function immediately. Check C515 & 516 and the jungle IC, IC206.
SEVEN Blinks---High voltage shutdown. The high voltage has exceeded 33k
and the unit goes immediately into safety shutdown. Check power supply
regulation and horizontal circuits.
EIGHT Blinks---Problem with the audio (AUDIO), unit goes to standby and
blinks the self-diagnosis code. Check IC406 audio amp, PS401 and 402.
Intermittent problems ?? This is a great feature. You can also bring up
these fault codes ON-SCREEN to see a list of the problem numbers with the
abbreviation of the problem and the number of times this problem has
occurred. This is slightly different than entering the service mode. To see the
diagnostic screen, Press the following buttons:
Display, Channel, 5, Vol Minus, ( Not plus ) then Power. This brings up
a screen with a list of the problems and number of times they have occurred.
Each of the problem names is abbreviated as, "OCP", "OVP", "V STOP", ETC.
We have repeated them in parentheses in the text for the "Blinks" described
above so you can correlate between the diagnostic screen and the blink
codes.
So, now that you know about these self-diagnostics, how do you use them?
Say that you have a set with a black screen. You see that the LED is blinking
4 times....This would tell you that you have no vertical and that is why the
video is muted. If it was blinking 6 times, you would know that you have a
horizontal fault.
It's not a sure cure, but it's a little better than a poke in the eye with a sharp
stick.
IMPORTANT: after you repair the unit, PLEASE clear the values on this
diagnostic screen. These codes do not reset themselves after the fault is
corrected, so if you don't clear them, you'll be seeing "old" fault codes the
next time you enter this screen.
Clearing is done by going into the service mode ( display, channel, 5,
volume plus, then power ) then press 8 and Enter, which of course returns
everything to the factory preset condition.

Hello I read your informative info on this just wondering if you could help me out if you know the service mode code or reset code for a Kolin KCP-2990FA 29inch model? I just had a horizontal problem after it had undergone an on off brownout episode. There's no manual dial on the back or inside to fix this so I'm sure I'm going to use the S-mode on the remote it seems not to be working. May anyone kind enough could help gladly appreciate it. Thanks:)