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Post by tokejo on Jan 25, 2014 20:55:07 GMT -5
When plugged in there is a flashing red LED. If I press the power button, I can hear a relay click, but that's all. The LED just keeps flashing red.
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Post by mastertech on Jan 25, 2014 21:08:31 GMT -5
I am attempting to located the proper documents to assist. While I am doing this I would like you to try something. Press and hold the "CD and standby/on" buttons and see if the display says anything.
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Post by tokejo on Jan 25, 2014 21:46:37 GMT -5
No change, standby light just keeps blinking.
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Post by mastertech on Jan 25, 2014 21:57:10 GMT -5
Should be able to start troubleshooting tomorrow. If you feel like doing a little hunting tonight you can skip ahead to all the output transistors and test them for shorts between the legs. DMM on diode scale, test 1 at a time looking for a close to short reading between any of the 3 legs. Then test the next one and so on.
There are 14 all together, 7 being 1 number and the other 7 being another number. All mounted on the large heat sink. You can compare same number results looking for 1 or more that may be different then the majority. See you tomorrow.
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Post by tokejo on Jan 26, 2014 13:49:02 GMT -5
Going to grab some lunch and then get to those transistors.
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Post by tokejo on Jan 26, 2014 16:04:51 GMT -5
Ok, measured all 14 transistors. The only two that seemed abnormal were #5 and #6.
Made 3 Measurements, +Probe on B/-Probe on C, + on B/-On E, + on C/- on E
Odd Transistors
BC=~720
BE=~720
CE=~1800+ kept creeping up for 30+ seconds
Even Transistors
BC=1500+ Kept creeping up
BE=~870
CE=~1432
#5
BC=0
BE=O
CE=overload
#6
BC=0
BE=O
CE=0
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Post by mastertech on Jan 26, 2014 16:12:06 GMT -5
Ok, 5 and 6 are blown. They will have to be removed. Can you give me their location id off the board?
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Post by tokejo on Jan 26, 2014 16:18:09 GMT -5
#5 - Q6051
#6 - Q6061
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Post by tokejo on Jan 26, 2014 16:19:16 GMT -5
Does this board have any notifications so that I can get an email when you respond?
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Post by mastertech on Jan 26, 2014 16:37:17 GMT -5
Ok, that is the front right channel. I would guess you have to pull that heat sink out to remove those 2 parts. Let me know when they are removed and there are some other parts we will have to test for damage. |
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Post by mastertech on Jan 26, 2014 16:38:31 GMT -5
Does this board have any notifications so that I can get an email when you respond? Unfortunately this forum only sends notifications once a day. The admin said they may look into that upgrade at a later date depending on forum sucess. SO tell your friends and relatives about this site. There are many subjects that questions can be asked. |
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Post by tokejo on Jan 26, 2014 16:40:57 GMT -5
Looks like that might take a while, getting started now.
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Post by tokejo on Jan 26, 2014 17:23:28 GMT -5
Ok, I just clipped the leads because I realized I only have a 15W soldering iron in the house and that's not going to cut it for desoldering them. I'll pick up another iron tomorrow.
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Post by mastertech on Jan 26, 2014 17:44:05 GMT -5
Did you try turning it on again after you clipped the legs?
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Post by tokejo on Jan 26, 2014 17:53:42 GMT -5
No, should I? I'll reconnect everything and get it ready.
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