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Post by mastertech on May 12, 2018 11:36:08 GMT -5
Ok, you are going to have to check the standby transformer (T902). Make sure you have 120vac input on pins 1 and 4. Check all the solder joints on the transformer. Then check ac voltage output of transformer across pins 5 and 9.
I have to run out for a couple hours so let me know what you get.
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Post by chriswonsowski on May 12, 2018 11:58:29 GMT -5
No worries, I appreciate your assistance and I check in when I can.
I have about 0.507vac across pins 5 and 9.
124vac at main and at pins 1 and 4 of transformer.
If the issue sounds like the transformer, I will say that it did have much higher readings before.
The fuse tests good as well. 0-.1 ohm.
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Post by mastertech on May 12, 2018 14:10:46 GMT -5
That AC output is not what it should be. Do a diode test on the following: Make sure receiver is unplugged. You may have to discharge caps C922 and C930 to get fairly normal readings on those diodes but if you can't get a normal reading on any of them it will have to be removed to test accurately.
D921
D922
D923
D924
D930
D931
D933
D935
Also, what fuse are you testing?
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Post by chriswonsowski on May 12, 2018 16:37:14 GMT -5
I was testing the fuse on the power supply board. The one by the connection from the wall and the other one that goes to the large transformer.
I will test all those diodes after work.
I tested a few already and they were good but I'll do all of them and report their voltage drop and make sure they're only flowing in one direction.
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Post by tibimakai on May 12, 2018 21:24:12 GMT -5
You are sure the relay is good? It is a known thing, that those fail.
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Post by chriswonsowski on May 12, 2018 22:23:49 GMT -5
So because I kept hearing about relay issues, I have a new one wired in right now, still have to solder it in though. I took the old one out, it was reading 500ohms which was more than the suggested 300.
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Post by chriswonsowski on May 13, 2018 11:08:15 GMT -5
So all those diodes tested .538v unplugged from outlet.
For the sake of it, I tested the other diodes on the board and diode D394 which is a physically different diode was .694.
Diodes D911 and D912 which are the same as the other 8 tested 0v, both beeped with continuity check in any direction and read less than 1 ohm resistance.
D925 was .202
To recap:
D911- 0v
D912- 0v
D921- .538v
D922- .538v
D923- .538v
D924- .538v
D925- .202v
D930- .538v
D931- .538v
D933- .538v
D934- .684v
D935- .538v
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Post by mastertech on May 13, 2018 13:05:50 GMT -5
Pull C921 and test it for short.
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Post by michelho on May 18, 2018 7:28:49 GMT -5
Probs of the power supply solved but now experiencing dim sound : display shows all speakers ooutputs ?
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Post by michelho on May 20, 2018 10:50:17 GMT -5
Probs of the power supply solved but now experiencing dim sound : display shows all speakers ooutputs ? and volume ineffective
Anybody can help abput this ? |
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Post by mastertech on May 20, 2018 20:17:38 GMT -5
Have you tried doing a master reset?
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Post by michelho on May 23, 2018 12:38:59 GMT -5
Have you tried doing a master reset? SORRY was sick 2 days: Yes sir, i am also looking for the output relays, i hear them working but i think have to check if got their 24 v and connecting/ display shows all outputs available
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Post by michelho on May 23, 2018 12:41:42 GMT -5
Have you tried doing a master reset? SORRY was sick 2 days: Yes sir, i am also looking for the output relays, i hear them working but i think have to check if got their 24 v and connecting/ display shows all outputs available
I checked output transistors voltage 60.5v +checked continuity of output wires to terminal boards : all no faults |
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Post by tibimakai on May 23, 2018 15:11:18 GMT -5
It can't be, the famous DSP chip issue?
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Post by michelho on May 23, 2018 18:50:56 GMT -5
It can't be, the famous DSP chip issue? Apparently no, i 've heated it twice with no result I saw on you tube that they did not get the outputs displayed on front,in this fault, not my case
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