google.com, pub-1990720073119592, DIRECT, f08c47fec0942fa0 How to Check power supply in LG LCD Skip to main content

How to Check power supply in LG LCD



LG42LH50


POWER SUPPLY PWB _ LOW-VOLTAGE TEST


AC Should not be applied at any time while adding resistors or while unplugging connectors as damage to circuit PWB may occur.





a) The SMPS PWB “MUST” be producing STBY 5V on all of the pins 7, 8, 9 or 10 (5V).  If 5V Standby is not being generated, the SMPS PWB is defective and must be replaced. There is no need to continue with the next test.


(b) Unplug P2400 on the Main PWB.


TEST 1:


(1) Add a 100Ωresistor between (5V STBY) pin 7, 8, 9 or 10 and Pin 2 (PWR). Apply AC. This will turn on the power supply.


a) Check that the 24V and 12V power supplies are turned on,


• P201 (24V pins 17 and 18)


• P201 (12V pins 13 and 14)

(2) Remove AC power.




POWER SUPPLY PWB _ BACK-LIGHTS TEST


P2400 Connector disconnected from the MainPWB. Apply AC after adding jumper.


Continue if the 1st test was OK. Leave original resistor in place.


(3) Add another 100Ωresistor between (5V) pin 7, 8, 9 or 10 and Pin 20 (INV On).


(4) Apply AC Power. Simulating a Power and Backlight On command.


Backlights Normal:


a) If normal, the backlights should turn on. SMPS OK.


Backlights Abnormal:


a) Recheck all connections.


b) Confirm the INV On/Off line pulling up to at least 3V.


REMOVE AC POWER:


c) Check the connections to the Backlights.


DO NOT check these when AC is applied as they carry 1200V each.




Note, either of the connections are unplugged, the backlights will not light.




POWER SUPPLY CONNECTOR-P201 VOLTAGE & DIODE CHECK


http://www.googleadservices.com/pagead/aclk?sa=L&ai=Cut0F48nfUsaoMMnakwWAgIG4CLTVrZED1PL4xFe8z5vbwAEQASChpOMNULGo9af______wFgywSgAYiR-fMDyAEBqAMByAPDBKoEnQFP0BUwmjyGd0DDEMbWBQh32VhKMlfgvpShcTJnKGDBJL1LuLIcLSYTCt5sMvc_5nV5DBdwtT4OZLTw27LFT3kbwTe9AYpL7DlLV1NAtjgDEaIH53BAKhcYhIR0cQs94BDi8CwCoia9VMj-cI3LsWCI-UDtqLfgcdZ6DJN3tuVSQQLvumZZDQJqnVCDPDPpM2vvcnSKDVyLYxWENoCuiAYBgAfg7oYM&num=1&cid=5GjpnRv39afdml9opcaiS-TU&sig=AOD64_3U1s3tCktsPNC8ZwCsfhZ_zT1TuQ&client=ca-pub-1990720073119592&adurl=http://www.alldatasheet.com&nm=4&mb=2&bg=!A0TCBE6NFWeJFgIAAAEJUgAAAEUqAOGbv2hWMOSktAl9olRqsb9vLXJuuxaMPgP5AixWRYRi74boQ0itAXlkYhA66MNyrmY4Oi6nS-yEBoPcbJ42lYv6C4-7W1Ln2PdzI8_ozt2yMzqZerQBLFRd6HToowshyLmTWk6jMWGapEfR7QEmU3PROzUzZKfd3Ghz69WcWBMcsuB9tok-XMl10dA1j2Q3omGO9SWsISdtv4scJWdn8-TMmK-7835tBr9C25GqvtoilU5PdgFDezYPYyTy9hYxpUJ3L5NrROUm1jbUIPCTs4IrgoUZKsqmAxmlBv0L30Z2Bzw


ADIM Pin 21 Fixed and not used.


PDIM Pin 24 can vary according to type of signal being processed and the OSD Back-light setting.


0.6V 0% to 3.3V 100%. Output from the video processor IC100.




















LCD LED Tv Panel Bypassing Methods eBooks.


Learn how to repair Panel failures,T-con problem in LCD LED TVs with comprehensive guide line with Schematics and Pictures of Problems, This eBook (PDF) or (Doc)format was written for Advanced Level of Technician of LCD LED and Plasma TV repair and includes many Bypass method. If you want to become expert in this filed of LCD LED TV repair  than this is a good eBook for you. Maybe you have a broken LCD TV sitting at home or your workshop and you want to repair it quickly. No Problem who you are or what your reason is for wanting to repair LCD or LED TVs you have come to the right place.Once you have complete your purchase you will be sent a link to download a copy immediately.

Volume 1 ,

Volume 2 ,

Inverter Bypass eBook,

SMD Data Guide eBook.






E-mail me after you deposit 55 USD with Paypal System.


At lcdledebooks@gmail.com





LCD LED Panel Méthodes Contournement eBooks .




LCD  LED Panel Méthodes Contournement eBooks .

Apprendre à réparer les défaillances du panneau , problème T - con dans TVs LCD LED avec la ligne guide complet avec schémas et photos de problèmes , Cet eBook ( PDF ) ou ( Doc ) format a été écrit pour avancée de niveau technicien de LED LCD et Plasma TV réparation et comprend de nombreuses méthodes de contournement . Si vous voulez devenir expert dans ce dépôt de réparation de TV LCD LED que cela est un bon eBook pour vous. Peut-être que vous avez un téléviseur LCD cassé assis à la maison ou dans votre atelier et vous voulez réparer rapidement. Pas de problème qui vous êtes ou ce que votre raison est de vouloir réparer les téléviseurs LCD ou LED vous avez frappé à la bonne place.Once vous avez compléter votre achat, vous recevrez un lien pour télécharger une copie immédiatement.





LCD/LED पैनल रिपेयर करने केलिए विवरण हमको ब्लॉग में, सर्विस मैन्युअल में, इंटरनेट पे मिलते हे ,लेकिन हमको सभी जगहों पर पहुँच नहीं सकते, हमें एक साथ सभी विवरण मिलता तो बहुत अच्छा होगा,  ebooks of Lcd Led Tv Bypassing Methods में पैनल का बहुत सारा विवरण  दिया हुआ हे,मेरे को यकीन हे ये  हमारे दैनिक जीवन में मदद करेंगे , ये बुक आपको ऑनलाइन पे भी खरीद सकते हो, इसकेलिए आप ये वेबसाइट पे जाने का हे  


  www.electronics-tricks.blogspot.com








പാനൽ നന്നാക്കുവാൻ സഹായിക്കുന്ന ഒരുപാട് കാര്യങ്ങൾ ഇന്റെർനെറ്റിലും ,ബ്ലോഗുകളിലും ,സർവീസ് മാനുവലുകളിലും  ഉണ്ടെങ്കിലും നമുക്ക് എല്ലാ സ്ഥലത്തും എത്തിപെടാൻ ബുദ്ധിമുട്ടാണ് ,അങ്ങനെയുള്ളപ്പോൾ  നമുക്ക് ആവശ്യമുള്ള പാനൽ സന്ബന്ധമായ ഒരുപാട് കാര്യങ്ങൾ  കോർത്തിണക്കി കൊണ്ടുള്ള ഒരു പുസ്തകമാണ് ebooks of Lcd Led Tv Bypassing Methods 


 ഇതിന്റെ ഉള്ളടക്കം നിങ്ങള്ക്ക് ഉപയോഗത്തിൽ വരുമെന്നതിന് സംശയം ഒന്നും തന്നെ വേണ്ട.ഈ ബുക്ക്‌ വാങ്ങുന്നതിന് വേണ്ടി ഓണ്‍ലൈൻ വഴി പണം അടക്കാം, അതിനു വേണ്ടി  പേജ് സന്ദർശിക്കുക 


lcdledebooks@gmail.com












Comments

Popular posts from this blog

Firmware TP.SK516S.PC821

  TP.SK516S.PC21 Firmware Download Available  Imran Ashraf Whatsapp Support QR Code  It's looks like you're searching for firmware or software related to the TP.SK516S.PB802 Mother Board Find the Correct Firmware on my this website  1. Check Your TV Brand & Model    - The TP.SK516S.PC821 is Main Board Number      2. Correct Resolution It's FHD or UHD 3. Get From Trusted Website and Trusted Person Like Imran Ashraf 10 Years in this     - If the firmware isn’t available on this website you may need to contected Imran Ashraf he can arrange your requirements       4. Caution with Firmware Flashing      Never download firmware from untrusted sites —it may contain malware or brick your TV.      - Ensure the firmware **exactly matches** your TV model and hardware version. If You Need Further Help: - Contact Whatsapp Support+923139292880 - Specify the issue (e.g., boot loop, no...

TP.SK518D.PB802

TP.SK518D.PB802 4G, 512  1920x1080 and 1366x768 Resolution Available Samsung IR Working  Firmware Available YouTube Channel Link 1920x1080 Buying Link 1366x768 Buying Link  Whatsapp Message or Call  +923139292880 Filename Type Size (View PDF) Samsung_2009_PDP_Plasma_Training_Manual_[TM].pdf PDF 3.7 MB (View PDF) Samsung_305TPLUS_[SM].pdf PDF 3.8 MB (View PDF) Samsung_510N_510T_710N_710T_910N_910T_[SM].pdf PDF 7.9 MB (View PDF) Samsung_Atlantis_DLP_Training_Manual_[TM].pdf PDF 2.6 MB (View PDF) Samsung_BN41-00521B_[SCH].pdf PDF 365 KB (View PDF) Samsung_BN44-000123E_[SCH].pdf PDF 344 KB (View PDF) Samsung_BN44-00025A_[SCH].pdf PDF 169 KB (View PDF) Samsung_BN44-00038A_[SCH].pdf PDF 238 KB (View PDF) Samsung_BN44-00041A_[SCH].pdf PDF 178 KB (View PDF) Samsung_BN44-00044A_[SCH].pdf PDF 251 KB (View PDF) Samsung_BN44-00050A_[SCH].pdf PDF 416 KB (View PDF) Samsung_BN44-00056B_[SCH].pdf PDF 140 KB (View PDF) Samsung_BN44-00066A_[SCH].pdf PDF 470 KB (View PDF) Samsung_BN44-...

Philips Codes

PHILIPS - 32PF 5320/28 (Service Mode, Error Codes & Fault Finding] Cont:- Philips 32PF 5320  Service Mode, Error Codes & Fault Finding [Cont:] NO PICTURE, BLANK SCREEN WITH CORRECT SOUND OUTPUT. Check whether the user menu is visible. If the user menu is OK, activate teletext mode. If teletext is OK, the problem is in the ADC [B18]&[Columbus 3D combfilter [B19], if present [depending on model]. If the user menu is not visible, check the LCD panel back light is ON. If the back light is OFF, the problem is in the power supply board or LCD panel.  Also check pin 12 (Lamp_ON_OFF) of 1J02.  It should be high, during normal operation. Fault finding purposes, it is important know the following:-   In Pixels Plus and Digital Crystal Clear models, which have an ADC [Analogue to Digital Converter] (B18), and Columbus 3D comb filter (B19), the digital input of the scaler is used for digital video path (Hercules output), whereas the analogue RGB output , a...