Faulty Philips PSU (715g5246-p01-000-002s )

[Mr_K]

Re: Faulty Philips PSU (715g5246-p01-000-002s )

Ok, lets start all over again.
Here are the readings:
On/Off 0V
DIM 0,01V
+12v 0V
+12v
Gnd
Gnd
Gnd
24v 0V
24v
PS-on 0V
5.2v 0V
5.2v

So yeah, basicly no output at all.

[budm]

Re: Faulty Philips PSU (715g5246-p01-000-002s )

Can I get good focused pictures of these area so I can clearly see the traces and the designators?

[Mr_K]

Re: Faulty Philips PSU (715g5246-p01-000-002s )

Sure, hope these are good enough. If you need anything else, pls let me know.

[budm]

Re: Faulty Philips PSU (715g5246-p01-000-002s )

Thanks. Can you get the part number of that 7-pin DIP IC for that standby power supply section? Also pictures of the same section on the top side of the board.

[budm]

Re: Faulty Philips PSU (715g5246-p01-000-002s )

OK, this is the best I can do by looking at the pictures.
Please check and see if you do have B+1 voltage.
Check the fusible resistors R9329, R9301 (I am not sure the exact values on these two resistors, cannot read the numbers on the body).
Check ZD9302 for low resistance reading on both direction. I am surprised that the two MOV's did not blow up, or the main fuse.

[Mr_K]

Re: Faulty Philips PSU (715g5246-p01-000-002s )

Wow, thank you very much!!!!!

7-Pin IC is: A6069H SK1N1

R9301 is 3,4Ohms (should be 3,3Ohms, so its fine)
R9329 is 0,2Ohms (should be 0,1Ohms, so its fine)

ZD9302: 3.5MOhms in one direction. Other direction is much higher

B+1: 308V

[budm]

Re: Faulty Philips PSU (715g5246-p01-000-002s )

OK, next thing we need is the resistance reading on all 7 pins of that IC and the Primary ground. Since there is not much in that circuits beside the two star up caps (9336, 9337) and the IC. You may want to replace those two caps and the IC if they are cheap.
I will have to look up the spec of the IC next.
By the way, now you understand why I always ask for good clear focused pictures.

[Mr_K]

Re: Faulty Philips PSU (715g5246-p01-000-002s )

Restistance according to "your" pinout. Actualy your pin 4 is pin 1. But i´ll stick to your counting....
1: 17MOhms
2: 0 Ohms
3: 228 Ohms
4: 3,3 Ohms
5+6: Starting at around 16M, going town to 1,4M and rapidly rising to a few K
8: Starting at around 8MOhms slowly dropping to 1,46M

I´ll have to order the IC first. But i´m afraight i wont get it in germany
Datasheet

[budm]

Re: Faulty Philips PSU (715g5246-p01-000-002s )

OK, here is the spec of the IC.


OK, I need to up date the pin out of the IC. I see two dot on the bottom side of the board by each end of the IC pin, so not sure which pin is pin1, now with the spec sheet now I see. I will update the drawing.
Please take the reading per spec sheet so I do not get confused, thanks.

[Mr_K]

Re: Faulty Philips PSU (715g5246-p01-000-002s )

UPDATE:
1: 3,3Ohms
2: 228 KOhms
3: 0 Ohms / prim. Ground
4: 17MOhms
5: Starting at around 8MOhms slowly dropping to 1,46M
7+8: Starting at around 16M, going town to 1,4M and rapidly rising to a few K

[budm]

Re: Faulty Philips PSU (715g5246-p01-000-002s )

That pin two looks bad, it has resistor R9320 (20K) to ground and MLCC (C9333) in parallel. So it eother has internla short in side the IC or shorted MLCC C9333. Can you lift pin 2 off the board to see the reading on that pad 2 still showing 228 Ohms?

[Mr_K]

Re: Faulty Philips PSU (715g5246-p01-000-002s )

It has 228KOhms. Missed the point.....
The pin reads 12,4MOhms. The pad still reads 228K

[tom66]

Re: Faulty Philips PSU (715g5246-p01-000-002s )

228kohm is bad though, with 20kohm in parallel, MAXIMUM reading is 20kohm.

[budm]

Re: Faulty Philips PSU (715g5246-p01-000-002s )

Yes, please check the number as printed on the body of that resistor, from the picture it looks like 203.

[tom66]

Re: Faulty Philips PSU (715g5246-p01-000-002s )

Corrected my previous post, maximum is 20kohm, not minimum.

[Mr_K]

Re: Faulty Philips PSU (715g5246-p01-000-002s )

Yes, please check the number as printed on the body of that resistor, from the picture it looks like 203.

R9320 is labled 2403 - so 240k

[budm]

Re: Faulty Philips PSU (715g5246-p01-000-002s )

by the way: "B+1: 308V" that seems low, what country are you in, it should be Line voltage x 1.414 = Voltage on the main filter cap.
There is not much in the circuit, I would try replacing the IC, but should find out why you only have 308vdc instead of 330V or so.

[Mr_K]

Re: Faulty Philips PSU (715g5246-p01-000-002s )

I´ll try replacing the IC as soon as i can get it....might be more than a week or so.

AC in ist 225vac; DC is 308vdc 10V less than expected. Is this still a problem?

[Mr_K]

Re: Faulty Philips PSU (715g5246-p01-000-002s )

Update and A happy new Year everyone!

Took some time to get my hands on the IC to replace the old one. After replacing, my readings are:
Here are the readings:
On/Off 0V
DIM 0,01V
+12v 0V
+12v
Gnd
Gnd
Gnd
24v 0V
24v
PS-on 3.3V
5.2v 3.3V
5.2v 3.1V

On standby, the front LED blinks three times followed by a longer break. I think this is related to missing 12V ?????

[Mr_K]

Re: Faulty Philips PSU (715g5246-p01-000-002s )

Update Resistance from every Pin to ground with a new IC A6069H SK1N1
PINOUT according to datasheet!!

1: 4 Ohms
2: 198 KOhms
3: 0 Ohms / prim. Ground
4: 16,7 MOhms
5: around 1M
7+8: NOT steady