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Post by tokejo on Jun 27, 2015 23:54:55 GMT -5
Though I only have one good HDMI board, I'd still like to get this receiver fixed.
Took a DMM to the finals and the FR channel is the only one different from the others.
First step will be desoldering Q5505 and Q5506.
Which components should I take a look at?
From the other thread (and converting from SR to FR), I'm guessing...
R5519 and R5521 0.47 ohm, you have to lift 1 leg to test because parallel.
R5520 and R5522, 0.47 ohm, "same as above"
ZD5502 and ZD5504
D5503 and D5505
Q5504, Q5501 and Q5502
R5515 and R5516 5.6k Ohm
R5517 and R5518 4.7 Ohm
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Post by tokejo on Jun 28, 2015 16:43:19 GMT -5
R5519 Good
R5521 Good
R5520 Bad
R5522 Bad
ZD5502, ZD5504 ,D5503 ,D5505 - took all of these out at once, 2 were Good, 2 were bad. Will replace all of them
Q5504 Good
Q5501 Bad
Q5502 Bad
R5515 Good
R5516 Good
R5517 Good
R5518 Bad
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Post by mastertech on Jun 30, 2015 9:27:08 GMT -5
I'm here watching. Your doing fine.
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Post by tokejo on Jun 30, 2015 11:03:05 GMT -5
The plan is to briefly power up the unit to see if it will go into protect mode or not.
If it doesn't, I'll order new parts and replace, then put back together and test with the working HDMI board.
If it does go into protect mode, I'll continue to look for bad parts.
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Post by tokejo on Jul 4, 2015 15:32:52 GMT -5
Powered it up, and it still goes into protect mode. Noticed that C5708 looks bulged.
Similar to the last one, I'm just going to replace:
Q5702= KSA992FTA
C5708= 100uf/100v
R5704= 100ohm/1watt
R5703= 4.7ohm/1watt
Well, I'm going to replace C5708 and order parts for the other 3. I'll put a meter to them when I next get a chance.
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Post by tokejo on Jul 9, 2015 15:56:02 GMT -5
Parts should be here by tomorrow, but I have a wedding to drive to and attend. Hopefully I get a chance to work on it next week.
Also picking up a 55" VIZIO VF551XVT with a "No Signal" issue today.
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Post by tokejo on Jul 13, 2015 20:45:21 GMT -5
Replaced:
Q5702= KSA992FTA
C5708= 100uf/100v
R5704= 100ohm/1watt
R5703= 4.7ohm/1watt
and
R5519
R5521
R5520
R5522
ZD5502
ZD5504
D5503
D5505
Q5504
Q5501
Q5502
R5515
R5516
R5517
R5518
It still shuts down after a few seconds.
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Post by mastertech on Jul 13, 2015 21:57:00 GMT -5
I'll look over schematics tomorrow.
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Post by mastertech on Jul 16, 2015 9:48:30 GMT -5
Sorry for the delay on this. I am having trouble finding enough extra time to look over the schematics. I will try later on today.
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Post by tokejo on Jul 16, 2015 12:04:14 GMT -5
No hurry. With family coming over this weekend (and next weekend) and a trip out to visit more family at the end of the month, my weekends are booked for a while.
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Post by tokejo on Jul 27, 2015 21:29:59 GMT -5
While I was cleaning up, I found a pair of finals. Now I need to double check my work and make sure I didn't put the bad parts back in.
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Post by mastertech on Jul 27, 2015 21:39:47 GMT -5
Well that would be something. If it still does not work I have some time I can spend on this now if you do. Let me know how you make out.
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Post by tokejo on Aug 3, 2015 22:21:25 GMT -5
Finally back home after a long weekend. I'll get the meter to it this week and see if I screwed up or not.
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Post by tokejo on Aug 7, 2015 18:19:24 GMT -5
Definitely screwed up. Q5506 was the original one and was bad.
Replaced it with the correct one, and now......no display. Grr.
Time to walk away for a bit. Frustrated.
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