nashou
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Post by nashou on Feb 16, 2014 17:06:29 GMT -5
Trying to fix my sisters Philips tv. This thing is a beast 132 lbs!!! I found two 3300uf caps bulging on the power supply board. replaced with 4700uf caps and same issue.
What should I look at next?
Nashou
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Post by mastertech on Feb 16, 2014 18:51:38 GMT -5
Does the red flash appear to be a code?
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nashou
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Post by nashou on Feb 16, 2014 19:06:04 GMT -5
Does the red flash appear to be a code? Ok it flashes 7 times fast. There is also a small daughter board set vertically on the main Power supply and it has a green led that also flashes 7 times. I can't see any board markings. I'll have to get a flash light. Nashou |
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nashou
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Post by nashou on Feb 16, 2014 19:11:15 GMT -5
On the main PS PCB there is a marking next to the perpendicular daughter board HIC8001 and next to that it has ALRM SIG.
Nashou
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Post by mastertech on Feb 16, 2014 19:14:41 GMT -5
The 7 blink code usually means the Y main is bad and the upper and lower buffer boards are probably bad also. They use to be sold in sets.
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nashou
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Post by nashou on Feb 16, 2014 19:37:30 GMT -5
Ok You are right about the main Board. If I unplug the main harness to the Y board the power stays on and I can power it on and off from the power button. So I thin tested with the burr boards disconnected and it did the same error code. Not sure if that means the buffer boards are ok or not.
Nashou
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Post by mastertech on Feb 16, 2014 19:47:17 GMT -5
Usually a buffer is what takes out the Y main. Do the scan ic's on the buffers have a heatsink on top or are they open?
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nashou
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Post by nashou on Feb 16, 2014 20:32:42 GMT -5
Usually a buffer is what takes out the Y main. Do the scan ic's on the buffers have a heatsink on top or are they open? What do the scan IC's look like. On the buffer boards there are no Heat sinks. Just through hole, SMD resistors Caps and SMD IC's. Nashou |
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Post by mastertech on Feb 16, 2014 20:56:06 GMT -5
Those SMD ic's which have around a hundred legs are the scan ic's. If you have a magnifier you can examine the surface of those ic's and you may find a small burn hole in 1 or more of them. Or discoloration of the ink stamp.
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nashou
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Post by nashou on Feb 16, 2014 21:04:39 GMT -5
Those SMD ic's which have around a hundred legs are the scan ic's. If you have a magnifier you can examine the surface of those ic's and you may find a small burn hole in 1 or more of them. Or discoloration of the ink stamp. Wait to you mean the drive board on the left and right? the buffer boards are on top and bottom and are made up of three similar boards. they do not have any cups that have 100 or so legs. Now the 2 Drive boards each on the left and right sides of the set have 6 each Ic with at least 100 legs. So I assume you mean those? Nashou |
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nashou
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Post by nashou on Feb 16, 2014 21:11:11 GMT -5
Ok It might be something simple as a fuse. there are two similar "main" board one on left on on right. I noticed a fuse on the one I did not unplug. So I found the fuse on the other one hidden under a support brace. It is open. have to find a replacement.
Nashou
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Post by mastertech on Feb 16, 2014 21:39:34 GMT -5
I will wait till you replace that fuse.
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nashou
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Post by nashou on Feb 16, 2014 21:56:36 GMT -5
Yeah I don't have any. have to hope radio Shack has them or some one else local. 6.3 Amp 250 volt . White body.
Mac are these slow or fast blow?
Nashou
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nashou
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Post by nashou on Feb 17, 2014 16:29:00 GMT -5
Ok So i put in the $4.49 fuse And it does the same error code. BUT, the fuse did not pop.
So I replaced caps C8059 and C8060 on the PS board. New fuse at F5003.
What next?
Nashou
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Post by mastertech on Feb 17, 2014 19:57:59 GMT -5
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