Marantz SR7001 standby blinking problem

mastertech Global Moderator Posts: 3,538	Marantz SR7001 standby blinking problem Oct 27, 2013 20:56:41 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by mastertech on Oct 27, 2013 20:56:41 GMT -5 Are you able to get at ic17 on the DSP board to do testing on the pins themselves while it is powered on?
	MT

ricardo Junior Member Posts: 23	Marantz SR7001 standby blinking problem Oct 28, 2013 16:17:47 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by ricardo on Oct 28, 2013 16:17:47 GMT -5 yes(plug it)

mastertech
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Marantz SR7001 standby blinking problem Oct 28, 2013 17:39:53 GMT -5

Quote

Post by mastertech on Oct 28, 2013 17:39:53 GMT -5

Ok. Remove the jumper you soldered across the relay on the standby board.

On the DSP board, locate R222 and see if it reads zero ohms.

DMM on DC and chassis for ground, receiver plugged in, check ic17, pin 72 for +5v. If yes, put positive probe on pin 69 and while holding it on there push the power button. Does it go to +5v while pushing power button?

ricardo Junior Member Posts: 23	Marantz SR7001 standby blinking problem Oct 28, 2013 21:51:45 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by ricardo on Oct 28, 2013 21:51:45 GMT -5 yes... all as you say...

ricardo Junior Member Posts: 23	Marantz SR7001 standby blinking problem Oct 29, 2013 22:05:26 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by ricardo on Oct 29, 2013 22:05:26 GMT -5 i just did the test as you show and it were in the same way.. R222 ok 5v pin 72 ok 5v pin 69 (while pushing power button)

mastertech
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Marantz SR7001 standby blinking problem Oct 30, 2013 11:01:35 GMT -5

Quote

Post by mastertech on Oct 30, 2013 11:01:35 GMT -5

On the same ic17 check pin 118 for +3.3v

If yes then test the following pins and fill in the blanks with your voltages:

Pin 14:_____
Pin 29:_____
Pin 41:_____
Pin 42:_____
Pin 43:_____
Pin 66:_____
Pin 68:_____
Pin 77:_____
Pin 99:_____
Pin 100:_____
Pin 112:_____
Pin 137:_____
Please make absolutely sure you are testing the correct pin number.

mastertech
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Marantz SR7001 standby blinking problem Oct 30, 2013 11:03:35 GMT -5

Quote

Post by mastertech on Oct 30, 2013 11:03:35 GMT -5

Oct 29, 2013 22:05:26 GMT -5 ricardo said:

i just did the test as you show and it were in the same way..

R222 ok
5v pin 72 ok
5v pin 69 (while pushing power button)

You have zero volts on pin 69 when not pushing the power button, correct?

ricardo Junior Member Posts: 23	Marantz SR7001 standby blinking problem Oct 30, 2013 12:34:10 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by ricardo on Oct 30, 2013 12:34:10 GMT -5 yes.... i have zero volts on pin 69 when not pushing the power button.

ricardo Junior Member Posts: 23	Marantz SR7001 standby blinking problem Oct 30, 2013 17:44:46 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by ricardo on Oct 30, 2013 17:44:46 GMT -5 Pin 118: 3.3v Pin 14: 4.96v Pin 29: 4.93v Pin 41: 4.93v Pin 42: 91.4mV Pin 43: -4.7mV Pin 66: 4.93 Pin 68: 93.5mV Pin 77: 4.96v Pin 99: 4.96v Pin 100: 4.96v Pin 112: zero Pin 137: zero

mastertech
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Marantz SR7001 standby blinking problem Oct 30, 2013 20:34:12 GMT -5

Quote

Post by mastertech on Oct 30, 2013 20:34:12 GMT -5

Well it appears as though your ic17 processor is not functioning properly. All your line voltages and protect voltages are correct and it should not have a flashing led. The turn on vlotage is there yet you get no response. This could be a failure of the processor itself, bad Eeprom, bad RAM, crystal, shorted control line, ect.
You could try testing the control lines for short to ground with your DMM. This would be pins 119 through 131. Otherwise, at this point it could be very difficult to find the problem without changing parts. And it still may end up being the processor.

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