Denon 1612 Protection Mode

sunnyfl Junior Member Posts: 27	Denon 1612 Protection Mode Aug 28, 2015 2:34:55 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by sunnyfl on Aug 28, 2015 2:34:55 GMT -5 Well, I'm getting the same about 5 seconds on, main power relay clicks, then it shuts off. I'm also getting ~16V on left channel's 1560 and 2390 emitter and base, and on all legs of KTC3114.

mastertech Global Moderator Posts: 3,538	Denon 1612 Protection Mode Aug 29, 2015 8:49:06 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by mastertech on Aug 29, 2015 8:49:06 GMT -5 You do have the + and - 40-60vdc on the collector of both Q7105 and Q7106, right? Are you getting that 16v before or after shutdown or both?
	MT

sunnyfl Junior Member Posts: 27	Denon 1612 Protection Mode Aug 29, 2015 10:40:39 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by sunnyfl on Aug 29, 2015 10:40:39 GMT -5 Yes, I have -/+ 56 on the collectors. The ~16V is right before shutdown, then it spikes to 32V before it starting draining off.

mastertech
Global Moderator

Posts: 3,538

Denon 1612 Protection Mode Aug 29, 2015 11:58:54 GMT -5

Quote

Post by mastertech on Aug 29, 2015 11:58:54 GMT -5

Ok, then lets have this thing always powered to do some testing. Solder a wire across the contact pins of main power relay RY901. These would be the pins with C9001 across them. Just remember that as soon as you plug it in, everything is hot.

Test for that 16v again and also do same test on "all" other channels. If 16v is still there on only the LF then remove R7116 and test for 16v again. If still there then remove Q7103 and test for 16v again. Let me know what you get.

sunnyfl
Junior Member

Posts: 27

Denon 1612 Protection Mode Aug 30, 2015 1:09:17 GMT -5

Quote

Post by sunnyfl on Aug 30, 2015 1:09:17 GMT -5

Sorry for getting back to you so late, here are some of my readings I'm getting with the jumper

FR Q7504 B21V C23V E21V Q7505 B23V C 55V E22V Q7506 B21V C -58V E22V

SR Q7404 B16V C18V E16V Q7405 B18V C 55V E17V Q7406 B16V C -58V E17V

C Q7304 B17V C19V E18V Q7305 B19V C 55V E18V Q7306 B21V C -58V E22V

SL Q7204 B19V C21V E20V Q7205 B20V C 55V E21V Q7206 B20V C -58V E21V

LF Q7104 B30V C32V E30V Q7105 B30V C 55V E30V Q7106 B29V C -58V E31V

This doesn't look good

Last Edit: Aug 30, 2015 1:12:24 GMT -5 by sunnyfl

sunnyfl Junior Member Posts: 27	Denon 1612 Protection Mode Aug 30, 2015 1:37:34 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by sunnyfl on Aug 30, 2015 1:37:34 GMT -5 With R7116 removed I'm now getting LF Q7104 B -1.1V C -1.1V E -1.1V Q7105 B -1.1V C 56V E -0.7V Q7106 B -1.1V C -58V E -.1.1V All other channels went up a volt or two

mastertech Global Moderator Posts: 3,538	Denon 1612 Protection Mode Sept 1, 2015 9:09:08 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by mastertech on Sept 1, 2015 9:09:08 GMT -5 Did the receiver happen to stay on with this resistor removed? I need you to value test these resistors in the LF. R7114,R7113,R7115,R7116
	MT

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Post by sunnyfl on Aug 28, 2015 2:34:55 GMT -5

Post by mastertech on Aug 29, 2015 8:49:06 GMT -5

Post by sunnyfl on Aug 29, 2015 10:40:39 GMT -5

Post by mastertech on Aug 29, 2015 11:58:54 GMT -5

Post by sunnyfl on Aug 30, 2015 1:09:17 GMT -5

Post by sunnyfl on Aug 30, 2015 1:37:34 GMT -5

Post by mastertech on Sept 1, 2015 9:09:08 GMT -5

Shoutbox