Philips 42PFL7403D Doesnt turn on

[pacmyc]

Re: Philips 42PFL7403D Doesnt turn on

OK. The only 1000 uF I've got is a 35 V.
Is it allright to replace with this one?

Replaced, no difference.
Could someone help me to confirm that it's really the PSU that is faulty? I dont want to spend another 100$ on another PSU and fint out that it's the main-board that's broken...

[Nightwalker]

Re: Philips 42PFL7403D Doesnt turn on

Hello everyone

A friend bring me a same TV with the same problem. Began 2 months ago, shut down by itself after a while and after 2-3 hours was operational again. Since 1 week, TV was completed dead and never power up again, so yesterday bring it to me.

Symptoms are like PACMYC's problem:
1.Disconnecting the IR LED connector -> PSU relay click
2.With connected IR LED, PSU relay do nothing
3.PIN 5 voltage is 3.3 steady when is not connected, 3.0-3.2 flashing when its connected.

At service manual says at page 27:

Error 18 (1V2-3V3-5V too low). All these supplies are
generated by the DC/DC supply on the SSB. If one of these
supplies is too low, protection occurs and blinking LED
LAYER error 1 = 2 will be displayed automatically. In SDM
this gives LAYER error 2 = 18.

But at connector 1M95, pin1 PSU side creates a 3.4 V stable when connector is disconnected and 3.0-3.2 when its connected.

I think that SSB board is faulty, not PSU or IR LED board, something had to do with software protection of this board and 3V3 standby power nor signal.

Any ideas?

[pacmyc]

Re: Philips 42PFL7403D Doesnt turn on

Hello everyone

A friend bring me a same TV with the same problem. Began 2 months ago, shut down by itself after a while and after 2-3 hours was operational again. Since 1 week, TV was completed dead and never power up again, so yesterday bring it to me.

Symptoms are like PACMYC's problem:
1.Disconnecting the IR LED connector -> PSU relay click
2.With connected IR LED, PSU relay do nothing
3.PIN 5 voltage is 3.3 steady when is not connected, 3.0-3.2 flashing when its connected.

At service manual says at page 27:

Error 18 (1V2-3V3-5V too low). All these supplies are
generated by the DC/DC supply on the SSB. If one of these
supplies is too low, protection occurs and blinking LED
LAYER error 1 = 2 will be displayed automatically. In SDM
this gives LAYER error 2 = 18.

But at connector 1M95, pin1 PSU side creates a 3.4 V stable when connector is disconnected and 3.0-3.2 when its connected.

I think that SSB board is faulty, not PSU or IR LED board, something had to do with software protection of this board and 3V3 standby power nor signal.

Any ideas?

Still no replies on this one..
Just be careful when testing with connector 1M95 disconnected, see my post #54

I ran the TV with the 3V3 stdby line to led panel control disconnected (without reconnecting it after the TV has started).. Something must have happened because I now I cant start the TV at all.
The background light lits up for a second and then TV goes dead.

If you find out anything useful please update me on it..

[schlickbert]

Re: Philips 42PFL7403D Doesnt turn on

hi there,

i just tripped upon this thread, having the exact same problem with my 7403.

could you fix your "problem" by now? and if so, how?

thanx and best regards!

schlickbert (new member / first post)

[Nightwalker]

Re: Philips 42PFL7403D Doesnt turn on

Hello

Still nothing from me, the only findings are (dont remember where i read it) :

Fee Q529.1E SSB used in many LCD TVs PHILIPS, but, unfortunately, 
in the past, they have become massively fail. The cause of their damage 
are substandard planar transistors. The purpose of these field-effect 
transistors is stabilized power supply (1.2 V, 2.5 V and 3.3 V) for the 
different controllers. Most often burned transistors responsible for 3.3 volts, 
transistor after 95% of the crashes controller PNX. The repair of these boards 
complex and not always a positive result, and we urge you not to try to repair 
themselves. For the repair of this unit requires the IR station, stencils, balls ...
So the problem is shown in LCD TVs PILIPS in case of failure of payment SSB Q529.1E

1. TV does not turn on, blinks 3 or 2 times

2. TV does not turn on the red light

3. Stripes on the screen, the sound is normal

The easy think is to find and change transistors, but i havent found PNX BGA on market yet..so i still searching..

[pacmyc]

Re: Philips 42PFL7403D Doesnt turn on

Hi. Sorry same here, no news.
Im giving up on this one as long as I dont get any tips of things to try.

[schlickbert]

Re: Philips 42PFL7403D Doesnt turn on

hi again,

maybe i should have read this thread more carefully. after measuring and experimenting, i finaly changed capacitor "2170" to 1000uF 25V on the main power supply.

until now everything seems to be working fine for me to ........ :-)

best regards
schlickbert

[pacmyc]

Re: Philips 42PFL7403D Doesnt turn on

hi again,

maybe i should have read this thread more carefully. after measuring and experimenting, i finaly changed capacitor "2170" to 1000uF 25V on the main power supply.

until now everything seems to be working fine for me to ........ :-)

best regards
schlickbert

Hi.
What do you mean? Is the TV now working??

[schlickbert]

Re: Philips 42PFL7403D Doesnt turn on

well,........

it was working as long as i dindn´t touch that fu...ing keyboard panel.......

now i inserted a delay circuit wich delays the ir/led board´s 3.3V from "sucking" immediately. this gives the power supply enough time to power up normally.

i know, this is not how it´s supposed to be done, but it works. the keyboard panel stil has some malfunctions, but i don´t care about that.

[robo374]

Re: Philips 42PFL7403D Doesnt turn on

Hello

Still nothing from me, the only findings are (dont remember where i read it) :

Fee Q529.1E SSB used in many LCD TVs PHILIPS, but, unfortunately, 
in the past, they have become massively fail. The cause of their damage 
are substandard planar transistors. The purpose of these field-effect 
transistors is stabilized power supply (1.2 V, 2.5 V and 3.3 V) for the 
different controllers. Most often burned transistors responsible for 3.3 volts, 
transistor after 95% of the crashes controller PNX. The repair of these boards 
complex and not always a positive result, and we urge you not to try to repair 
themselves. For the repair of this unit requires the IR station, stencils, balls ...
So the problem is shown in LCD TVs PILIPS in case of failure of payment SSB Q529.1E

1. TV does not turn on, blinks 3 or 2 times

2. TV does not turn on the red light

3. Stripes on the screen, the sound is normal

The easy think is to find and change transistors, but i havent found PNX BGA on market yet..so i still searching..

have you managed to find anything wrong ?

[haimv]

Re: Philips 42PFL7403D Doesnt turn on

hi,i have the same problem,what is the solution?

[Tony_I7_]

Re: Philips 42PFL7403D Doesnt turn on

Hallo,

gibt es schon was neues? Da ich auch dasselbe Problem habe!


Hoffe das Thema, wird wieder aktiv.

[Tony_I7_]

Re: Philips 42PFL7403D Doesnt turn on

I got the TV running again! I had several film capacitors in suspicion. Namely, 2247, 2112, 2165, and 2179 since two of them (2165, 2179) are in the standby circuit. The other two I just exchanged with. And with success!

2247, 100nF 5% 630V
2112, 1uF 20% 305V
2165, 22nF 20% 305V
2179, 100nF 20% 305V

[rgulian]

Re: Philips 42PFL7403D Doesnt turn on

Hello everyone.

Same problem with my TV !

Philips 42PFL7403D/10, red light blinking - 2 blinkings.
On the board, I do not see anything explode or burn.
When connected to electricity, the red light flashes twice and stops and again twice...

hi again,

maybe i should have read this thread more carefully. after measuring and experimenting, i finaly changed capacitor "2170" to 1000uF 25V on the main power supply.

until now everything seems to be working fine for me to ........ :-)

best regards
schlickbert

I got the TV running again! I had several film capacitors in suspicion. Namely, 2247, 2112, 2165, and 2179 since two of them (2165, 2179) are in the standby circuit. The other two I just exchanged with. And with success!

2247, 100nF 5% 630V
2112, 1uF 20% 305V
2165, 22nF 20% 305V
2179, 100nF 20% 305V

Please mark on the picture, which parts you replaced...

Thank you...

[Maalobs]

Re: Philips 42PFL7403D Doesnt turn on

Which chassis do you have?
Take a look at the sticker on the back of your device, it's specified there.
There seems to be either a Q529.1E LA or a Q529.1E LC chassis for this model, whatever the difference is.

That post you are replying to was from almost five years ago, good luck with that.
I think he was helpfully referring to the PCB layout index with his four-digit codes, because that's how they are listed in the Q529.1E LA service manual (instead of them being specified there as C2247 for example).
If you have that chassis too then you can download the service manual from this page and do a text-search on each of those codes.
If you get a hit on the circuit diagram index first, search again for the PCB layout index.

[rgulian]

Re: Philips 42PFL7403D Doesnt turn on

5 years !!!

[Maalobs]

Re: Philips 42PFL7403D Doesnt turn on

In that case, download the service manual and press Ctrl-F in Adobe Reader to text-search for the component codes.
You'll get a hit on the page below, here you can see that 2247 has a reference to grid location A4 on the PCB layout, and that is where you find the component, or at least the upper left corner of it.


But before you start replacing components, you could investigate what the built-in diagnostic on the device can tell you.
You are getting layer-1 error code 2 right now which is pretty broad.
You can enable hardware SDM to see what layer-2 error code you'll get, which will be more specific.
Take a look in section 5.2.1 in the service manual, it explains how you can enable SDM by hardware:

I think it refers to the two vertically aligned pads on the right.

Then you can skip ahead to section 5.5 that covers error codes, there you will find table 5-2 that describes the different error codes that you can receive, and there is also further informative descriptions about the different error codes in that section:


Finally, section 5.6 describes how to interpret the blinking LED into the error codes.

I hope this helps!

[rgulian]

Re: Philips 42PFL7403D Doesnt turn on

hi.

I have already ordered these capacitors, I have not received them yet.
2247, 2112, 2165, 2179, 2170.
I ordered with the same data listed on the capacitors that are on my TV.

My board is different.