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stefuel
Joined: 07 Mar 2006
Posts: 3353
Location: Green Harbor MA USA
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| Posted: Mon May 02, 2011 11:29 am Post subject: |
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I just scrolled through the whole electrical parts list and PS302 is the only other fuse that has not been tested yet.
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macgyver655
Joined: 22 Aug 2007
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| Posted: Mon May 02, 2011 2:35 pm Post subject: |
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| stefuel wrote: | | macgyver655 wrote: | | stefuel wrote: | | now I have to go search out PS302 on the AV board. |
It should be right off of CN205. I forget the pin number and it's on a different PC from where I am now. |
IT's pin 2 (-11V). It's pin 2 on the PS, AV and panel L board. It appears to go straight through with a brief pit stop at PS302. If I have continuity between pin 2 at the PS and pin 2 at the panel L board, PS302 and everything inbetween should be good. |
Nope, that wont work. There is a switch transistor in between. See schematic below.
Also, you said in a PM that you can only see the back of the AV board and cant test that fuse. I also added a pic of the back of the board and circled the fuse location to test from there.
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8792 Time(s) |
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8792 Time(s) |
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stefuel
Joined: 07 Mar 2006
Posts: 3353
Location: Green Harbor MA USA
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| Posted: Tue May 03, 2011 12:01 am Post subject: |
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Well it isn't PS302. Power on both sides of it and power to the output connector on the AV board to the panel L board.
I also checked CN204 for power from the sub power transformer when the power board is engauged. It is supposed to be 10VAC on both sides relative to ground. I'm showing 12.3 but there doesn't seem to be any load on it.
My next pit stop will be the panel L board to check the other end of the power cable from the AV board.
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Tue May 03, 2011 12:22 am Post subject: |
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You sure the florescent isn't turned off? There's a switch on the front I believe.
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stefuel
Joined: 07 Mar 2006
Posts: 3353
Location: Green Harbor MA USA
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| Posted: Tue May 03, 2011 12:46 am Post subject: |
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| macgyver655 wrote: | | You sure the florescent isn't turned off? There's a switch on the front I believe. |
Oh paaalease. Give me some credit. If it was off, there would still be a indicator on the front display saying so.
I'm pretty sure the problem is the panel L board. I unfastened it from the chassis giving me access to the front where you can probe CN1001 for power just before you slip and take out one of the fuses you just replaced 
I slipped on the second time through testing the voltages. They are there and no front display. I'm out of 1 and 2 amp fuses so I'm done for the night.
Look at T1081 on the panel L board. How do you test that??? I wonder how much a panel L board complete costs?
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macgyver655
Joined: 22 Aug 2007
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| Posted: Tue May 03, 2011 1:10 am Post subject: |
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Thats your DC to DC converter. Page 89 shows test voltages for Q1081, Q1083 and Q1083 for powering the florescent display.
Just remember you skipped by a whole bunch of voltage tests on the AV board and even if you have your voltages to the display it still may not light.
Test all voltages coming to that L board.
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stefuel
Joined: 07 Mar 2006
Posts: 3353
Location: Green Harbor MA USA
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| Posted: Tue May 03, 2011 1:30 am Post subject: |
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I know someone has been in here before me and I'm getting a sneaky suspicion on how those fuses got trashed. It's not easy probing surface mount stuff in tight quarters
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Curt Palme
CRT Tech
Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC
TV/Projector: All of them!
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| Posted: Tue May 03, 2011 2:31 am Post subject: |
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| Sparky015 wrote: | | so what is an IC link? |
Someone at Sony still learning the language mis-spelled a bunch of ICE RINK brochures, so rather than waste them, that's what they called what others call a fuse. 
Thanks, I'll be here all week.
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macgyver655
Joined: 22 Aug 2007
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| Posted: Tue May 03, 2011 3:16 am Post subject: |
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| stefuel wrote: | | I know someone has been in here before me and I'm getting a sneaky suspicion on how those fuses got trashed. It's not easy probing surface mount stuff in tight quarters |
Take your positive test probe and get a file and file it to a nice sharp point. It is less likely to slip when testing hot plus allow for testing much smaller pins without touching others.
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stefuel
Joined: 07 Mar 2006
Posts: 3353
Location: Green Harbor MA USA
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| Posted: Tue May 03, 2011 11:24 pm Post subject: |
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This project is on hold. The seller wants it back..
So we will now switch gears and play Lets find the tick in the escient.
Mac, will that set of probes/amplifier trick work for that to isolate the tick?
I still have that set up in the garage from when I was working on that sub amp.
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Tue May 03, 2011 11:30 pm Post subject: |
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| stefuel wrote: | This project is on hold. The seller wants it back..
So we will now switch gears and play Lets find the tick in the escient.
Mac, will that set of probes/amplifier trick work for that to isolate the tick?
I still have that set up in the garage from when I was working on that sub amp. |
Post more specific details on that. I don't remember where we left off. Did it start back up or not?
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stefuel
Joined: 07 Mar 2006
Posts: 3353
Location: Green Harbor MA USA
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| Posted: Tue May 03, 2011 11:59 pm Post subject: |
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| macgyver655 wrote: | | stefuel wrote: | This project is on hold. The seller wants it back..
So we will now switch gears and play Lets find the tick in the escient.
Mac, will that set of probes/amplifier trick work for that to isolate the tick?
I still have that set up in the garage from when I was working on that sub amp. |
Post more specific details on that. I don't remember where we left off. Did it start back up or not? |
Yea it started but has a wicked feedback hum or something. It's in a box in my garage with your old address on it 
I'm not sure if you remember but the board was crispy critters. The board was blackend, traces burned off and some IC's toasted. I replaced a bunch of burned parts and made some jumpers to replace the missing traces. Some day when I don't have a job anymore (Like soon)  , I may pull it back out of the box to look at it again.
Do you remember instructing me to make a probe with a resitor on it and use a audio amp to probe for sound at various places on the board. I still have that all set up in the garage. Could I use that to probe for the ticking sound at boot up on the Escient?
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Wed May 04, 2011 12:08 am Post subject: |
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| stefuel wrote: | | macgyver655 wrote: | | stefuel wrote: | This project is on hold. The seller wants it back..
So we will now switch gears and play Lets find the tick in the escient.
Mac, will that set of probes/amplifier trick work for that to isolate the tick?
I still have that set up in the garage from when I was working on that sub amp. |
Post more specific details on that. I don't remember where we left off. Did it start back up or not? |
Yea it started but has a wicked feedback hum or something. It's in a box in my garage with your old address on it
I'm not sure if you remember but the board was crispy critters. The board was blackend, traces burned off and some IC's toasted. I replaced a bunch of burned parts and made some jumpers to replace the missing traces. Some day when I don't have a job anymore (Like soon) , I may pull it back out of the box to look at it again.
Do you remember instructing me to make a probe with a resitor on it and use a audio amp to probe for sound at various places on the board. I still have that all set up in the garage. Could I use that to probe for the ticking sound at boot up on the Escient? |
Hehehe....I remember all that. I meant where did we leave off with the Escient....LOL.
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stefuel
Joined: 07 Mar 2006
Posts: 3353
Location: Green Harbor MA USA
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| Posted: Wed May 04, 2011 12:29 am Post subject: |
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We haven't done anything with it. You were going to see if you could come up with a manual. Escient support doesn't have parts or manuals. I was given a PH number for a Denon repair facility. Know anyone at Denon? If you want that number it's in a email I have saved.
I'm pretty sure if I can locate the source of the tick the booting problem will be solved. There is a couple more of these on fleabay with the same problem.
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macgyver655
Joined: 22 Aug 2007
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| Posted: Wed May 04, 2011 12:42 am Post subject: |
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I remember the manual part. I haven't received any hits on it yet.
I know you said it booted up once. Was the tick there then? Did it function fully?
Now it wont boot fully and ticks, correct? Describe everything you see and hear while its trying to boot up.
PM me that number, I may have some contacts.
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stefuel
Joined: 07 Mar 2006
Posts: 3353
Location: Green Harbor MA USA
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| Posted: Wed May 04, 2011 1:15 am Post subject: |
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| macgyver655 wrote: | I remember the manual part. I haven't received any hits on it yet.
I know you said it booted up once. Was the tick there then? Did it function fully?
Now it wont boot fully and ticks, correct? Describe everything you see and hear while its trying to boot up.
PM me that number, I may have some contacts. |
I can't tell you if the Tick was there when it was running as I didn't have the audio connected just the video. It appeared to be fully funtional. All the OSD menu screens came up. There was noise in the video output.
At the same time as the audio tick there is a brief flash of a Escient startup screen.
There is a 12, 5 and 3.3 volt section. I think the problem is in the 3.3 section at that fluctuates at the time of the tick.
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macgyver655
Joined: 22 Aug 2007
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| Posted: Wed May 04, 2011 1:22 am Post subject: |
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Ok, then to answer your question "Mac, will that set of probes/amplifier trick work for that to isolate the tick? " the answer is no.....
At this point I would normally say to ESR test the caps in the P/S. But you probably dont have an ESR tester, right?
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stefuel
Joined: 07 Mar 2006
Posts: 3353
Location: Green Harbor MA USA
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| Posted: Wed May 04, 2011 6:03 am Post subject: |
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| macgyver655 wrote: | Ok, then to answer your question "Mac, will that set of probes/amplifier trick work for that to isolate the tick? " the answer is no.....
At this point I would normally say to ESR test the caps in the P/S. But you probably dont have an ESR tester, right? |
The 3.3V is solid as a rock with the supply disconnected from the main board. I was also thinking about looking for a bad cap but more on the main board than in the supply.
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stefuel
Joined: 07 Mar 2006
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Location: Green Harbor MA USA
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| Posted: Thu May 05, 2011 2:16 am Post subject: |
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Trying to buy, beg, borrow or steal a local ESR tester is proving to be more problematic then I thought. Going to have to build or buy one.
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macgyver655
Joined: 22 Aug 2007
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| Posted: Thu May 05, 2011 2:34 am Post subject: |
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Are any of your voltages fluctuating with the tick?
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