Philips 37PFL5603D/10 Botched TCON repair - but can I fix it?

**will62** · 01-13-2018, 02:00 PM

Re: Philips 37PFL5603D/10 Botched TCON repair - but can I fix it?

A top mark of AS15-F is part no. EC5575-F. Two types, E & E2. Your's is type E, pin 40 is not connected. The other, E2, pin 40 is Vcoml-.

Have you thought of cleaning with alcohol and a brush, then refluxing/reflowing. Looks like a lot of crap between the pins. Check for short
between VDD and VSS.

Attached Files

EC5575 AS15-F-.pdf (654.7 KB, 17 views)

**R_J** · 01-13-2018, 02:09 PM

Re: Philips 37PFL5603D/10 Botched TCON repair - but can I fix it?

Like above post, check the other pins, could be just a poor solder connection & resoldering the ic might fix it, worth a try

**Andrew F. Ali** · 01-13-2018, 02:55 PM

Re: Philips 37PFL5603D/10 Botched TCON repair - but can I fix it?

Looking at that 'mess', I would opt to purchasing another T-CON Bd., all together.

**freakaftr8** · 01-13-2018, 03:09 PM

Re: Philips 37PFL5603D/10 Botched TCON repair - but can I fix it?

I agree. You might find that there are more problems from shorted pins in missing pins that caused other issues within the tcon in which if you were to purchase another AS15 you might find that you just wasted your money because the board has other failures.

But 1st try to rework the other man's poor job and see if maybe you'll straighten it out

**saddle_au** · 01-14-2018, 12:21 AM

Re: Philips 37PFL5603D/10 Botched TCON repair - but can I fix it?

If the screen just shows white with a dim image, the screen may not be damaged and the board should be repairable. Looking at the repair job, it will probably not be soldered underneath. Soak the pins quickly in acetone, do not scrub hard. Use chipquik to remove it.

Using a small width solder braid, clean the board using along the pad strokes, not across pads to minimise lifting damaged pads further. Avoid any side to side movement when desoldering and cleaning. Inspect the board carefully after cleaning, any divits under the chip on the base pad can also cause problems seating it back on. The base pad needs to be dead level.

I'd put the schematic for the board up here but I've only got the vf, vc and ve versions of the T370HW02 schematics, not the V402 one.

Solder shorts between legs on the AS15 can seriously hurt the panel. Always test the AS15 for leg to leg shorts after you're finished before powering on. No pin on the chip has adjacent pins shorted to it on the T370 board. Use some non-conductive thermal paste under the chip if you are not going to attempt soldering that pad.

**dicky96** · 01-14-2018, 07:34 AM

Re: Philips 37PFL5603D/10 Botched TCON repair - but can I fix it?

Thanks guys. I have successfully replaced AS15 before on other TVs and keep some in stock as it is cheaper to buy several at a time.

As I said, if I take the customers comments at face value then the TV was working after this previous repair. Possibly it has failed again due to bad soldering or the AS15 failed again due to bad heat conduction and the fact Gran Canaria is a sub tropical island!

I have no idea how old this repair is but as the TV came with the fixtures and fittings and this guy has had the bar about 12 months, it must be at least as long as that.

I will clean it up as suggested though I think it may be easier to remove this chip and fit another after cleaning the PCB. I'm just hoping the remaining pads don't lift. Nothing to lose really apart from the small cost of the chip. Also I guess it will be good experience to have a go reworking it. I will mention to the customer that any repair attempt could make it worse.

At the moment the picture is very washed out low contrast, with a light white background all over.

Shame I can't easily check the gamma voltages as, due to the design of the set, it is very difficult to get to the tcon with the lvds and backlight cables still attached to the main and psu boards