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PHILIPS 21CE7550

TV - EPROM
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EPROM
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    PHILIPS 21CE7550 21 CE 7550
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Relevant TV forum topics:
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 14B413/19 (Philetta 36 De Luxe) fehér -fekete 36cm-s TV hiba megoldva
A fent említett Philips Philetta 36 de Luxe 14B413/19 elég régi kis, hordozható fehér-fekete tranzisztoros TV, két ellenállás elégve R231 csak a barna csík látható(1....), R232 csak a piros-piros csíkok láthatóak(22...), ezeknek az értéke: az R231 megoldva 10 omos ez a +B(10,3V)-ra csatlakozik ezen az ellenálláson keresztül kap betáplálást a sormeghajtó tranzisztor Emittere, az El-kók is cserélve a környékén ami okozhatta a bajt, BC327 zárlatos, cserélve . A kollektoráról a driver meghajtó trafóra és az R232 megfejtve: 2,2k ellenállásra cseréltem . elindult az öreg készülék! Tökéletesen műxik! Kisebb képméret szabályozás a potmétereken és kész. Link: http://www.radiomuseum.org/r/philips_philetta_36_de_luxe_14b41.html Nem elég írni, olvasni is kell tudni! "Rajzot, service manualt, jobbra a "Keresem/WANTED" doboz "KATT IDE" gombján keresztül kérj!"
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Sziasztok! Nem vagyok jártas tv javításba, azért kérnék egy kis segítséget. Philips 28PT5107/51 típusú tv a következő hibát produkálja. Bekapcsoláskor csak ciceg, vagyis nem bír elindulni a tápja. Ha kiforrasztom a nagyfesz tekercset akkor beindul. Mielőtt ez lett vele, hideg bekapcsoláskor általában harmadikra indult be. A másodiknál volt kép, de csak egy kicsi középen. Mit érdemes ilyenkor megnézni, biztos-e hogy a nagyfesz a rossz. Előre is köszönöm a válaszokat!
PHILIPS 21GR2556/42B Panel képek
Akinek van ilyen tévéje nem tudna készíteni néhány képet a panel fóliás oldaláról, hogy a TDA2579A lábai forrasztásnál hogy vannak helyesen? SM-ből nem kivehető 2461/62 2360 2470/75 tda2579a
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