Hi,
i've a Philips 105S (105S11) monitor with the CM2315P chassis and it's got the following problem..


The only way it works fine is putting something heavy on the top-back of the monitor as the following picture shows..


Can anyone tell what can be the problem?
Thanks in advance

Check soldering on flyback diodes.

6607 & 6608 on a CM23 diagram not sure if it is the same as yours.

Rich

It seems that my monitor PCB is different that the schema that i have (Phillips 105B2 CM23).
Can anyone send me the Philips 105S CM2315P schema.

Thanks in advance.

Hi does yours have double diode at 6600. The fault is someting in the line scan is open circuit.

Rich

Hi, in the Philips 105B2 CM23 schema that i have, the 66xx diodes are the following

6603 DIODE BAV21 (UAW)
6604 DIODE RGP10D (GI)
6605 DIODE 1N4148 (UAW)
6606 DIO REC BYV27-50
6608 DIO REC 31DF6 A (INRO) B

Was this you were asking?

I think i'll get my Philips 105S11 schema.. if so, it will be easier to find out those diodes.
To see if they are ok or not, i must replace them, or is there another way, using a multimeter, for example...?

Only 6608 and the diode in series with it to the collector of the HOT.

Anything before the hot should not cause this fault.

Rich B

Ok, i'll try to replace them as soon as I get time and I buy some components to replace them.
The only way to check what component is faulty is replacing it?

DIODE RECTIFIER 31DF6 A (INRO) B
31DF6 -> Is this the reference to the component?

I already find the datasheet at http://www.crownpo.com/system/documents/download/rectifiers/12056.pdf
I think is this.

I'm a beginner... could you tell me in a few words what's the collector of and the HOT?
I'll try to get the 105S11 schema so I can find which components beside that can be faulty.

Hi you do not need to replace you just need to find the broken joint as you say applying pressure fixes the fault.

Rich B

Ok, that's right... the problem must be a broken joint. I'll try to open the monitor again and try to find out the problem. I think that today i'll receive my monitor scheme also.

Just tell me please what is the HOT..?

Thanks a lot

HOT = (H)orizontal (O)utput (T)ransistor

Rich B

Richard B, thanks a lot, the problem is solved and was very simple.
The problem was a broken joint in the 6600 (DMV32) rectifier diode.
I only needed to fix the joint.

Thanks a lot!

So, this kind of problem is related, or can be related, with this diode.

Hi if you go back to my 2nd post I asked you if yours had 6600 double diode.

Rich

Yeah, i know that, but i didn't have the monitor schematic to find it.. and I was having problems fully opening the monitor...
The diode was very easy to find.. but i didn't know it!

Anyway, thanks a lot!!

Hi all, I've a problem with my philips 105S, it can't start brightly but need some times to become in normal condition. First start all is black then become brighter after long time. could you help me solve this problem?

Hi!
I'm afraid that I cannot help you but I'm almost sure that's a common problem and should be some component that need to be replaced.
Hope someone can tell you which component that is.
Have you searched the same problem but in a diferent monitor? Most of the time the problem is the same.. but the component is not the some, is an equivalent.