Service manuals, schematics, eproms for electrical technicians

SONY KV28WS1U CH BE3B 0

TV - EPROM
Type: (ZIP)
Size
242.0byte
Page
---
Category
TV
EPROM
If you get stuck in repairing a defective appliance download this repair information for help. See below.
Good luck to the repair!

Please do not offer the downloaded file for sell only use it for personal usage!

Looking for similar sony manual?
Document preview [1st page]
No preview item


No preview item for this file.

Possible causes:
  • No preview picture generated yet.
  • It is not a pdf file.
Advertisements
Please tick the box below to get download link:
  • Also known:
    SONY KV-28WS-1U CH BE-3B KV28WS1U BE3B KV 28 WS BE
  • If you have any question about repairing write your question to the Message board. For this no need registration.
  • If the site has helped you and you also want to help others, please Upload a manual, circuit diagram or eeprom that is not yet available on the site.
    Have a nice Day!
  • See related repair forum topics below. May be help you to repair.
Warning!
If you are not familiar with electronics, do not attempt to repair!
You could suffer a fatal electrical shock! Instead, contact your nearest service center!

Note! To open downloaded files you need acrobat reader or similar pdf reader program. In addition, some files are archived,
so you need WinZip or WinRar to open that files. Also some files are djvu so you need djvu viewer to open them.
These free programs can be found on this page: needed progs
If you use opera you have to disable opera turbo function to download file!
If you cannot download this file, try it with CHROME or FIREFOX browser.
Translate this page:
Relevant TV forum topics:
-SOLVED- SONY KDL-32EX600 red led 2 flashing - negative 120V backlight missing PSU GE3D APS-272
Hello
I have on my table this sony kdl32ex600 with backlight issue. It's a common failure of this psu but i do not find any part faulted on this board.
The schematic it is almost the same, with minor differences with GE3B found at page 56 on this service manual:
https://elektrotanya.com/sony_kdl-32ex600_kdl-40ex600_kdl46ex600_chassis_az1-k.pdf/download.html
Uploaded only the page 56 from this sm to easing the search.
The red led it's flashing 2 times, meaning psu faulty. Indeed the led backlight does not light.
With the PSU outside of the tv, just with one resistance of 180ohm between standby ( pin 1 3,3V on connector CN6150 ) i get this values
on in:
starting with pin 1

1  +3,3V ST-BY
2  +3,3V AC_OFF_DET
3  +3,3V POWER_ON (with resistance 180ohm between pin1 and pin 3)
4  +12,56V AUDIO_12V
5  0V AUDIO_12V_GND
6  0V REG_12V_GND
7  0V REG_12V_GND
8  +12,6V REG_12V
9  +12,6V REG_12V
10  +0,1V BL_ERR
11  +3,3V BL_ON
12  0V DIMMER
13  0V DIMMER_DC
14  0V T-CON_Vcc_12V
15  0V T-CON_ON
All measure done at secondary ground point C6800 GND as reference.
Meanwhile, the led connected to CN6800 will remain with no light at all. The CN6800 will deliver positive 91V.
The negative branch will deliver at CN6801 ( both pin1 & 2 ) just -1V.
In the training manual found always in here at
https://elektrotanya.com/sony_kdl-32ex600_40ex600_46ex600_chassis_az1k_training%20manual.pdf/download.html
at page 56 will say "SHORT" at pin 12 DIMMER for testing the PSU, always with pin 3 POWER_ON connected to 3,3V ST-BY - pin1.
If i'll put a 180ohm resistance between GND and pin 12 DIMMER, then the tension on CN6800 will rise to +179V and the negative from the CN6801 will rise to -5V, the backlight led will light very very weak.
All tension from CN6805 will remain the same, except the BL_ERR will rise from +0,1V to +1,1V.
With only power_on pin 3 shorted by 180ohm resistance to the pin 1, i get this weak oscillation at emiter of Q6816 + Q6817

[URL=https://picturepush.com/public/16067400][IMG]https://www1.picturepush.com/photo/a/16067400/640/diverse/Q6816Q6817.jpg[/IMG][/URL]

With pin 12 DIMMER shorted ( always by a 180ohm resistance ) at GND, the oscillation will change from 250khz 1,6vpp to almost 70khz at 0,81Vpp. as below:

[URL=https://picturepush.com/public/16067401][IMG]https://www1.picturepush.com/photo/a/16067401/640/diverse/20181117-175255.jpg[/IMG][/URL]

Already checked the capacitors C6828 / C6830 together with D6805 / D6806.
Also checked the L6800 ( trafo ) and i've get 5,5mH instead of 5mH, i think it's ok.
All fuse checked, ok.
Q6814 and Q6801 tested under mosfet tester, ok.

[url=https://picturepush.com/public/16067402][img=https://www1.picturepush.com/photo/a/16067402/220/16067402.jpg][/url]

IC6800 & IC6801 gave +9V and respectively +2,49V

Already checked various components all over the board, i am out of ideas.

Any idea or help would be apreciated.
 
SONY KV-29LS60E chassis: AE-6B furcsa hiba
Sziasztok! Van egy SONY TV Típusa:KV-29LS60E a menüje mindig elövillan magától,ez mitől lehet,találkozott .é már valaki ilyen problémával??Csatoltam képet róla...100 hz es a tv. AE-6B SASSYE... Üdv:Sparco
Sony KDL-32EX402 legtöbbször csak látszólag kapcsol ki. (megoldva)
Sziasztok! Nevezett készülék érdekes hibát produkál, legalábbis én még nem találkoztam ilyennel. Kikapcsoláskor készenléti led átvált pirosra, hang/kép eltűnik. Viszont igazából nem kapcsol ki, (indító fesz táp felé megvan, inverter feszültsége is, stb.)tápegység teljes üzemben marad és a processzor is dolgozik. Sőt ez utóbbi nagyon is, hiszen jobban melegszik mint "bekapcsolt" állapotban. Ilyenkor bekapcsoláskor egy pillanatra átvált a készenlét, de rögtön ki is kapcsol, ebben az esetben ténylegesen. Ezek után rendben bekapcsolható. Valaki találkozott már ilyen hibával, vagy megosztaná velem érdemi ötletét? Köszönettel: Kiss Z.
Sony KV-29LS60K képe elhalványodik
Sziasztok! Adott anyós KV-29LS60K csodája. A baja az, hogy bekapcsoláskor a gép elindul, van rendes képe, majd 1 perc alatt teljesen besötétedik, gyakorlatilag semmi nem látható rajta. Nem kontakt hiba, ütésre, melegítésre, hűtésre nem reagál. Néha gondol egyet, kikapcs, 2-es hibakóddal. Az érdekesség, hogy ha kikapacsolom, majd újra be, akkor normális a kép, majd 1 perc, ismét szépen lezár a képcső, és sötét a kép. Nyúzás után a gép bekapcs után ad normális képet, majd tökig kinyit, vibrál, kikapcsol. Néha 2, néha 3 villogás a LED-en. merre induljak?
Similar manuals:
If you want to join us and get repairing help please sign in or sign up by completing a simple electrical test
or write your question to the Message board without registration.
You can write in English language into the forum (not only in Hungarian)!

E-Waste Reduce