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Post by ricardo on Oct 14, 2013 12:41:54 GMT -5
Hi to all
i have a Marantz SR7001 with standby blinking problem i don´t know how start to find the failure
anyone can help me to fix it?
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Post by mastertech on Oct 14, 2013 19:03:23 GMT -5
Is this when you first plug it in or after you try to turn it on? Do you hear any clicks during the process?
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Post by ricardo on Oct 14, 2013 19:06:13 GMT -5
this is when first plug it and the relays do not close
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Post by ricardo on Oct 14, 2013 19:20:11 GMT -5
After unplugging the regulator pwb from the power pwb (CN90), I got a steady amber light instead of a red blinking light, nothing on the display. I also noticed this
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Post by mastertech on Oct 14, 2013 19:38:12 GMT -5
The relay that I was looking to see if it is closing is RY701 on the standby board.
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Post by ricardo on Oct 14, 2013 19:49:15 GMT -5
not, the relay RY701 do not close
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Post by mastertech on Oct 14, 2013 20:22:41 GMT -5
Well I looked over the schematics and plus the fact that the led is flashing I believe at this point it is in protect mode. So here's what I would do. I would solder a jumper wire across RY701 on the standby board. I believe you know which pins to jump so the receiver is on. If your not sure then post back. Then I would plug in the receiver and watch for any smoke just in case so you know where it is coming from. If no smoke then I would see if the display is on. If not try hitting the power button to see if it comes on. If the receiver appears to be on then I would go to the amp board and test the test points with your DMM on DC and see if you get any with voltage on them. Test points are CN41, CN42, CN51, CN52, CN61, CN62 and CN71. Voltage should only be around 2.4mV on each. I'll check back tomorrow to see how you made out.
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Post by ricardo on Oct 15, 2013 20:48:48 GMT -5
i just solder the jumper in the relay and plug in it but it no power on and the led still flashing
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Post by ricardo on Oct 15, 2013 21:03:35 GMT -5
the measures in the CN´s were 2.6 to 1.8
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Post by mastertech on Oct 16, 2013 8:41:31 GMT -5
the measures in the CN´s were 2.6 to 1.8 Is that volts (v) or millivolts (mV)? |
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Post by ricardo on Oct 16, 2013 11:34:48 GMT -5
that is in mV and the test was in the pin of the right side watching the amp from the rear side with the ground from the chasis
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Post by mastertech on Oct 16, 2013 11:52:48 GMT -5
You cannot use chassis ground for this test. You must use the 2 test points at each location.  |
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Post by ricardo on Oct 16, 2013 12:31:38 GMT -5
the measures were 1.5 to 0.9 mV
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Post by mastertech on Oct 16, 2013 16:07:57 GMT -5
Ok, you are going to have to check for some voltages. This will be at the regulator board and DMM on DC. Locate connector BN97-1 or BN97-2. Center pin is gnd. 1 outer pin is +15v and the other is -15v. Then locate connector CN93, pin6 is gnd and pin4 is +5v. Then connector BN94, pin 6 is gnd and pin 5 is +5v. Let me know what you get.
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Post by ricardo on Oct 16, 2013 18:14:48 GMT -5
i already checked the +15v and -15v and they are ok, i tell you later what i get about +5v...
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