Re: Philips 32PFL3606/58
It says 49uF
It says 49uF
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Re: Philips 32PFL3606/58
The TNY277PN must be working since it generates the 5V output. In your case a little low at 4.74V.
However it also generates the voltage to run IC808 and IC902 via another winding from the same transformer (T902) which is then rectified and smoothed by D904 and C912 but only measures 10.8V.
IC808 requires a minimum of 11.5V and typical 12.5V to turn on which it's not getting. The voltage at D904 is too low which I think may be the reason that it is not running IC808 to boost the voltage to 380VLast edited by dick_barton; 10-20-2019, 10:49 AM.Willing to help but I'm no expert.Comment
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Re: Philips 32PFL3606/58
Nope,can only change the whole capacitorComment
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Re: Philips 32PFL3606/58
It would be worth trying that.Willing to help but I'm no expert.Comment
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Re: Philips 32PFL3606/58
Still the same 10.80V
Faund the ESR meter,it says 0,75 ohm,0.7% lossLast edited by nbdy; 10-20-2019, 11:34 AM.Comment
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Re: Philips 32PFL3606/58
Sorry but I'm now out of ideas at the moment. Perhaps others can offer further advice.Willing to help but I'm no expert.Comment
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Re: Philips 32PFL3606/58
thx for now ..
If you got new ideas let me try :-)
Any other advice is welcome 2Comment
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Re: Philips 32PFL3606/58
Any one with some idea ???
Does any one know where to buy another PSU ... Looked on ebay there is none ...
thxComment
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Re: Philips 32PFL3606/58
When checking voltages in the primary side, use the large (100µf/450v) capacitors negative lead for ground.
Check the voltage across the large capacitor, in standby the voltage should be around 325vdc. When you connect S/B to +5v that voltage should go to around 380vdc. check it. and if it does not change, check pfc ic, using hot ground check the vcc voltage on pin8 of ic909, it should be around +20vdcComment
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Re: Philips 32PFL3606/58
@R_J : Got 325V on the capacitor in both states with the S/B on 5V or not ...
The IC909 has 10V on pin 8 ..Comment
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Re: Philips 32PFL3606/58
The PFC circuit is not being turned on. If it was, the voltage on the main cap would icrease. I suspect you are not getting 20v VCC, this VCC voltage also supplies ic902 pin6.
The 10 volts on IC909 pin 8 is supplied by it's internal startup cell. Check the voltage on Q903, The emitter should have ~25vdc, the base is controlled by optocoupler IC905. When IC905 is ON, pin4 will be low turning on Q903 which supplies the +20dc for IC909 and IC902 VCCLast edited by R_J; 10-26-2019, 10:11 AM.Comment
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Re: Philips 32PFL3606/58
I have 13.3V on Q903 ...Comment
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Re: Philips 32PFL3606/58
The C912 Shows 49uF ESR 0.54 Loss 0.8%
The ZD910 shows 720 in one direction, 6V reading on board or -6V turning the probes
The ZD903 shows 717 in one direction, 4.3V reading on board or -4.3V turning probes
Diodes desoldered from board for testing ...
Could it be that the IC901 is not OKLast edited by nbdy; 10-26-2019, 11:53 PM.Comment
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Re: Philips 32PFL3606/58
If ic901 was bad you would not have any +5v standby voltage. You can't check the zener point of zener diodes with a meter. Have you tried replacing C912? Have you checked if R918 is ok?Comment
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Re: Philips 32PFL3606/58
The R918 showing 4R7 ...
The C912 replaced,all the same ...Comment
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Re: Philips 32PFL3606/58
If your +5v standby is ok. disconnect thge s/b line from 5vstb, now check the voltage across IC906 pins 3&4. There should be some voltage there. Now connect the S/B line to +5v and see if that voltage goes to 0 volts. It should if the optocoupler is working.Last edited by R_J; 10-27-2019, 12:54 PM.Comment
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Re: Philips 32PFL3606/58
I have 970mV on both states with S/B on 5V,and without the S/B on 5V ...
and without the ENA to 5V connected ...
With ENA to 5V all the same - 970mV
So i think changing the optocupler maybe be the solve ... will try tomorrow ...Last edited by nbdy; 10-27-2019, 01:05 PM.Comment
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Re: Philips 32PFL3606/58
Check the voltage across IC906 pins 1&2, that will tell you if the internal led is being turned on or not. Use the same method for testing by disconnecting and reconnecting S/B to +5v
You can also monitor the voltage across C912 and try shorting IC906, pins 3&4 to see if the voltage changes and goes up to around +20v
There could be a fault wiith Q908 not turning on the optocoupler, when S/B is connected to +5v, Q908 drain should go to 0 volts, the same with Q907Last edited by R_J; 10-27-2019, 01:36 PM.Comment
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Hello,
I've got a really strange issue with the speakers on my Philips 43PUS7506/12. It makes this awful loud buzzing now. It happened after it was attempted to be wall mounted - I think the back got squeezed and something broke.
I thought maybe the speakers got damaged, so I replaced them - no dice.- Using the internal speakers, it always happens.
- Using the headphone jack, it never happens.
- Using the digital/optical out with a soundbar - it happens after about 2h/movie runtime - it's never as drastic, it just pops in and out, but I didn't want it to damage the sound bar
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Hello Team,
New issue on LCD panel where I need to find out the cause and the potential solution.
This is on the Philips 50PUH6400, the LCD panel is an INNOLUX V500dk2 xrs1.
I have image, on the right side, the image is more or less normal even if there is a small blur on edge, on the left there is an issue.
When moving up and down in the menu on the right the image is slow to disappear, and is darker, like red/brown.
I've checked voltages, no issue found comparing right and left side of the panel driver.
VHG VGL CKV... are the sames on... -
Hello partners.
Could someone tell me how to make this Philips TV source work without the mainboard being connected? The model of the board is EAX65423701 (2.1) and the model of the Philips TV is 40PFH40009/88.
The TV is dead, there is no standby light, however there is a voltage of 12v on the pins ( included 12v VAU ) and 3.2v on the PS-ON pin (see photo) when the power board is connected to the main board. If I disconnect both boards I only get 8 volts on 12v pins. I would like to rule out a fault in the main board by making it work, but so far no one has been able to tell... -
i have a philips for repair 55pus7909/12
fault is no display but the white logo philips lit below of the screen
No display
No backlight
no sound
power supply the standby voltages are ok
Any Help regarding this problem?
Thanks -
TV is Philips 40PFT4101/12, power supply 715G6934-P01-000-002M, motherboard 715G6947-M002-000-004Y (703TQGPL068).
The problem is that when it is plugged in, the TV turns on by itself, the Philips sign appears, the backlight turns on and off a couple of times, and the TV turns off, and so it repeats itself in a circle. It does not respond to the remote and nothing is written on the screen, the red light does not blink.
A few weeks ago, it used to turn on by itself about once a week, but after that it worked, now it doesn't work.
I checked the power supply, voltages are fine,...
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