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PHILIPS CHASSIS LC4.3EAA

TV - SERVICE MANUAL
Type: (PDF)
Size
27.3 MB
Page
128
Category
TV
SERVICE MANUAL
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  • Also known:
    PHILIPS CHASSIS LC-4.-3EAA LC4.3EAA LC EAA
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Relevant TV forum topics:
PHILIPS 37PFL8404 chassis: Sq548.1E LA Kikapcsolgat.
Kedves kollégák!
Ez a készülék bekapcsolás után 10-15 mp múlva kikapcsol. Amíg üzemel van kép és hang is. Akár tasztról akár távról lassan reagál a funkciókra.
A tápfeszek a tápon is és a main-on is min rendben megvannak. Amikor kikapcsol,akkor is minden táp  megmarad,kivéve a PFC-t. Egyébként a PFC 412 V-on megy,nem tudom ez gond e. Mind két procit,hőprofilosan átmelegítettem.Minden kondi ESR értéke tökéletes. Hősokkos behatárolás nem segített. A proci rezonátorát cseréltem. Amikor kikapcsol,úgy jön vissza,hogy egyszerűen megjelenik a kép és a hang is.
Ha készenlétbe rakom furán veszi. Hibakódot nem villog. A proci mintha nagyon melegedne. De ha lehűtöm (fagyasztom) a kikapcsolási és a bekapcsolási idő semmit nem változik. Kicsit úgy tűnik,hogy szoftver hibás.De hogy lehet ezt egyáltalán újra szoftolni.
üdv.
40PFL4707 Philips logo and shutsdown
Dear Expert
The details of my TV is as follows

1. Philips 40PFL4707/F7 Manufactured March 2012
2. SMPS Board BA21P6F01 01 1
3. SMPS board has a sticker that says A21P6MPW C 7219720
4. This is a 110v Mains Supply TV sold in USA
5. I imported this from USA into my country where we have 230V.
6. I have a simple winding transformer that converts 230v to 110v

The TV has been having this problem.  Here are the steps
1. Mains power on
2. Front panel white led blinks 6 times
3. Philips logo display
4. TV shuts down immediately
5. Nothing happens.  If i press power button on TV or remote nothing happens
6. Have to power off and then wait for few minutes to experience same repetition.

Last two days, tried several times, only once the TV started and after 10 minutes it did auto shutdown as there was no input signal connected.

Does this indicate issues with SMPS or main cpu board ? Even if its faulty, how did it start once ?

More testing done as follows
1. Removed all connectors. Cleaned all three pcb with liquid cleaner. Cleaned all connectors externally and internally ( holes) using painting brush. Allowed everything to dry.
2. Reconnected
3. Started. This time, went past the Philips logo. I could connect a macbook via HDMI and play youtube videos on the TV for ~1 hours.
4. Using remote, entered service mode and initialized ( factory reset) the TV
5. For 1 hours of proper run, measured voltages. LED+24v was showing properly at 24v, AL+3.3v was at proper 3.3v and the P-ON-H1 was properly at 3.3v
6. After about 1 hrs, the screen shut down. The LED+24v is showing at 6v, AL+3.3v at 3.3v and P-ON-H1 is a 0v. This indicates the main cpu board has turned off the P-ON-H1 signal.
7. Power off, wait for 2 min. Power on... same philips logo and TV shuts down. Problem repeats.
8. Firmware is Code TVNB010_00_PF_XX91_BA PIC code U10_CM08:_40A_C7W_R_02. Did a google search and found no references if this firmware needs any upgrade.

requesting experts next steps to root cause the issue. I suspect the main board is bad and the SMPS is good. What if I manually put a wire from AL+3.3v to P-ON-H1 ? will the TV be on or is it risky for the main cpu board ?

I am attaching the service manual for this TV
PHILIPS 25pv808/39
Sziasztok! A címben említett típusban meghalt a ptc vgy ntc ptk nem tudom 3 lába van epc05 t209 ü102 felirattal a tetején ez van a dmag körben. Pontossan mi lehet ennek a típusa mit rakjak bel? Most nélküle megy a tv-m csak attól félek foltos lesz a képernyő ha van sematic jól jönne. Vagy elég a típus. Segítségeteket előre is köszönöm.
Philips (Universum) FT81808
Tisztelt kollegák! A fenti típusú készülékkel akadt problémám, mégpedig a következő: a képnek jelentős párnatorzítása van, a kép teteje és alja szélesebb mint a valós képméret, a közepe pedig keskenyebb. Tanácsot kérek a hiba elhárításával kapcsolatosan.
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