Re: Philips 32PFL3403d/27 LCD NO POWER
Sorry I was gone for a while....I didn't detect much of a voltage drop across R931,932 and 943. So I unplugged wire 10 from CN902, tested the voltage of #10 pin on CN100, (to pin 6 for gnd) with 2.1V....
Mach1
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Last Activity: 09-05-2011, 07:11 AM
Joined: 07-18-2011
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Re: Philips 32PFL3403d/27 LCD NO POWER
Well, I had to do some rigging, and this is what I did. I left everything connected, and tapped into the CN902 pin 6 for ground (the negative side for the power supply) and connected my 2.2k resistor to the (+ side)3v power supply, and tapped into pin 10. Then tested the voltage across the 2.2k with the ac power on by connecting the DMM on eiter side of the resistor. The reading is 0.57V...Leave a comment:
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Re: Philips 32PFL3403d/27 LCD NO POWER
What should I use as ground for R140? Incidentally I measured 1.3V across the resistor. (end to end)...Last edited by Mach1; 08-22-2011, 06:09 PM.Leave a comment:
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Re: Philips 32PFL3403d/27 LCD NO POWER
You have to follow the link that is about in the middle of the page (below the listed models), that will take you to another screed to do the actual download.
I was able to get a bunch of manuals there. If this one isn't the right one, then there are others.
here is the link:
[url]http://english.electronica-pt.com/electronics-search.php?find=LC8.1U[/url] LA
let me know if you get it.
TTYL Mach1Re: Philips 32PFL3403d/27 LCD NO POWER
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Re: Philips 32PFL3403d/27 LCD NO POWER
Well I managed to find a more comprehensive manual, (14 MB PDF) too big to upload. Should I get you the web address?Leave a comment:
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Re: Philips 32PFL3403d/27 LCD NO POWER
Well, I'm not sure if the sevice manuals I found contain that same board. Hmm, do you think we will crack this one?Leave a comment:
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Re: Philips 32PFL3403d/27 LCD NO POWER
With pin 3 of IC905 as ground I get 9.1V across pin 4. I used the same ground (pin3) to measure the voltage on R947: 17.6 on one side and 17.4 on the other....Leave a comment:
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Re: Philips 32PFL3403d/27 LCD NO POWER
I wonder if we can find some info on that main board, perhaps a different service manual. I can find the number of that board....Leave a comment:
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Re: Philips 32PFL3403d/27 LCD NO POWER
I did this twice to be certain of the values....Leave a comment:
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Re: Philips 32PFL3403d/27 LCD NO POWER
I have some novice questions:
For the SMPS controller, do I connect the 3V power supply through pin 10 and 6 as before?
When measuring the voltages, should I use the live ground piont as the negative (black probe) and the points 'Main SMPS Vcc' (red) and 'Standby SMPS Vcc' (red)?
Then I assume that when you say PS_ON, I hit the power on button like before?
Mach1...Leave a comment:
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Re: Philips 32PFL3403d/27 LCD NO POWER
ok, for both Q905 and Q906 I get:
Black lead to B, red lead to E 0.7 V
Black lead to B, red lead to C 0.7 V...Leave a comment:
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Re: Philips 32PFL3403d/27 LCD NO POWER
well now,... on Q905, with the rod probe on "B", open all cases, so with the black probe on "B" I get .724 from B to E and .719 from B to C. (if I switched the legs, the right to C(red) I get the 1.45 as before, FYI)
For 906, I treated the left leg as E, right as B and C as the head: from B to C(red) I get .7 to both E&C, (if I switchd legs made the left leg B and the right E, I get B-C=1.87 and B-E open)...Leave a comment:
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Re: Philips 32PFL3403d/27 LCD NO POWER
All the semicinductors tested open with the DMM set at the 200 range. Now with the dmm set to the diode test, ZD902 tested open in one direction, .5v reversed; D913 tested open/.624v reversed; ZD907 open/.71v; ZD901 open/.71v. The transistor Q906 tested open left leg to head, 0.7v one way between legs and .71 one way between the right leg and head. The transistor q905 tested open left leg to head, .722v one way leg to leg and 1.45v right leg to head one way....Leave a comment:
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Re: Philips 32PFL3403d/27 LCD NO POWER
Pool party is up my alley, I went to state in swimming. I swam the 500yd, 200yd and 100 yard almost 30 years ago. I wish I was in that kind of shape.
One thing I do need to ask is how do I test the semiconductors for shorts?
I've tested the resistance across the leads to find [B][I]no[/I][/B] conductivity.
Aslo the markings on the two black transistors are 36 5J (the 36 is on the horizontal and the 5J is written vertical. That may or may not be improtant).Re: Philips 32PFL3403d/27 LCD NO POWER
...Leave a comment:
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Re: Philips 32PFL3403d/27 LCD NO POWER
Well, this is how one is to learn, respectfully from guys like you. So I've tested the IC905 to the blue dots: 0.0 ohms to the dot left (J923) and 0.0 oms to the dot on the right.
The red dot on the right is connected to pin 6 on IC901, the lower/middle dot (R912) is also connected and the dot at C911 is NOT connected.Leave a comment:
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Re: Philips 32PFL3403d/27 LCD NO POWER
Well, I was tinkering around myself tooking for that trace and I happened upon something that seems odd look at the attached picture. I've circled in red the area of concern, namely R933 seems to be missing. I was tracing from Pin 6 of IC901 and noticed the skip. Tell me what you think.
Oh and by the way, there is no resistance from J923 to Pin3 of IC905....Leave a comment:
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Re: Philips 32PFL3403d/27 LCD NO POWER
I guess I'm understanding my handicam a bit more to get a beter close-up, that and I played with the lighting.
I did see some power supply boards for this TV on the net for sale, do you think they are as bad as this one? I was looking to satisfy my curiosity. One was for $60 some odd bucks and the other was for $200 something and I don't want to dump that kind of cash into this thing.. I guess if we can't get this thing to go, I'm dumping it and will NEVER EVER buy a philips made TV.Leave a comment:
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Re: Philips 32PFL3403d/27 LCD NO POWER
With the 3v supply hooked up, I read 5.9V across pins 4 and 6. Then for the optoisolators, read from left to right in the pic being IC903, IC905 and IC907, circled in orange, and NO 3v hooked up, I get 0.4v, 10.3v and 1.1. Then connecting the 3v power supply, I get 8.1, 0.3, 1.1....Last edited by Mach1; 08-04-2011, 07:41 PM.Leave a comment:
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Re: Philips 32PFL3403d/27 LCD NO POWER
Now I get 8.0 V.Leave a comment:
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Re: Philips 32PFL3403d/27 LCD NO POWER
Well, that was fun. I got 0.36 to 0.40 vdc. I identified the pins using the schematic in the user manual, pin 7 is skipped...Leave a comment:
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