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marciart11
Joined: 19 Apr 2011
Posts: 51
Location: Budapest
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| Posted: Fri Sep 23, 2011 6:12 am Post subject: My Barco 808 vertical board problem |
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Barco Graphic 808 verticals board I transferred it an other one out of Barco Graphic 808, and better left TDA 8172 deteriorated ones I exchanged it, the panel was good, by the time I exchanged it at twice, then TDA IC destroyed, since the blue cathode-ray tube was made to join onto a badly connecting deflection his cable, I exchanged it again IC exchanged before, and the panel was not good already. That question of mine what may have gone wrong on the panel yet how?
The bad projector, Quad were wrong!
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barclay66
Joined: 27 Jun 2011
Posts: 1304
Location: Germany
TV/Projector: Marquee 9500 Ultra
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| Posted: Fri Sep 23, 2011 6:57 am Post subject: |
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Sorry,
That (Google?) translation You're using is very bad. Please try again using simple sentences...
Regards,
barclay66
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marciart11
Joined: 19 Apr 2011
Posts: 51
Location: Budapest
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| Posted: Fri Sep 23, 2011 7:31 am Post subject: |
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I don't speak English, this translate me, not Google!
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marciart11
Joined: 19 Apr 2011
Posts: 51
Location: Budapest
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| Posted: Fri Sep 23, 2011 7:46 am Post subject: |
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The deflection coil connected to the wrong location because of the deteriorated tda8172!
I changed the TDA 8172 IC, which then operated the panel is broken!
The next attempt once again ruined the panel changed the TDA 8172 has not been working!
Deflecting wire connected to the wrong place then i realize.
I did not fint, bad resistor and diode!
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barclay66
Joined: 27 Jun 2011
Posts: 1304
Location: Germany
TV/Projector: Marquee 9500 Ultra
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| Posted: Fri Sep 23, 2011 10:09 am Post subject: |
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| marciart11 wrote: | | I don't speak English, this translate me, not Google! |
Sorry then, I didn't mean to insult You.
Just let me try to describe your problem in my own words:
You connected one of the three (for Red/Blue/Green) deflection Connectors (J23, J24 or J26) wrongly. Then one of the TDA8172 on the Vertical Deflection Board (R7622695) was destroyed. You replaced the TDA and when switching the set on it blew again. You tested Diodes and Resistors near to the TDA and they checked out OK. Now You're asking on how to repair it.
If I interpreted this well and would be in Your situation I would check the following:
Which of the LED's on the G2 Diagnostic Board are lit? The red "SCAN FAIL" LED should be on when one of the Deflection Modules doesn't work.
Are the supply voltages for the TDA's present?
Look for +9V at Connector J2, Pin A30 of the Vertical Deflection Board.
Look for -17V at Connector J2, Pin A27 of the Vertical Deflection Board.
Check Fuse F202 (+9V) and Fuse F201 (-17V) on the SMPS Board
Check for any shorts from Output of each TDA (Pin 5) against Ground/+9V Line/-17V Line.
Check that now the Deflection Connectors are placed correctly.
Tell us what You find out!
Regards,
barclay66
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marciart11
Joined: 19 Apr 2011
Posts: 51
Location: Budapest
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| Posted: Fri Sep 23, 2011 10:36 am Post subject: thanks |
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thanks for your answer! i look today!
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marciart11
Joined: 19 Apr 2011
Posts: 51
Location: Budapest
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| Posted: Sat Sep 24, 2011 7:39 am Post subject: Re: thanks |
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The All voltage you have on the board! What to do next?
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marciart11
Joined: 19 Apr 2011
Posts: 51
Location: Budapest
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| Posted: Sat Sep 24, 2011 8:39 am Post subject: Re: thanks |
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The HTHD and +Conv led pulses on g2 board. The all fuses good on SMSP and G2 board.
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barclay66
Joined: 27 Jun 2011
Posts: 1304
Location: Germany
TV/Projector: Marquee 9500 Ultra
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| Posted: Sat Sep 24, 2011 8:44 am Post subject: |
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Hi,
what about the other things I wrote?
Of course the fuses must be intact but what about the shorts?
And, which of the TDA's is affected (IC11, 12 or 13)?
Do you have circuit diagram?
Regards,
barclay66
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marciart11
Joined: 19 Apr 2011
Posts: 51
Location: Budapest
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| Posted: Sat Sep 24, 2011 9:00 am Post subject: |
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HI!
The IC12 is wrong!
Yes, i have Barco service manual.
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barclay66
Joined: 27 Jun 2011
Posts: 1304
Location: Germany
TV/Projector: Marquee 9500 Ultra
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| Posted: Sat Sep 24, 2011 7:28 pm Post subject: |
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Hi,
If it is IC12 then it's the Vertical Deflection for the blue tube. In this case I would do the following:
- Check or directly replace D23, D31 and D32
- Check or directly replace C53 and C55
- Make sure that the TDA8172 is of original quality (SGS Thomson/ST Micro etc.) and not a counterfeit part
- Make sure that the TDA is mounted correctly to the heatsink well isolated and with good thermal contact
You could do another test. The problem with this test is that it could kill You another TDA:
- If the cables are long enough, You could swap the blue deflection connector with the green one next to it.
- If this kills the TDA for green (IC13) the You have a short in the blue deflection coil and should get a replacement.
Although I've never seen a shorted deflection coil I wouldn't exclude it being possible.
Regards,
barclay66
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marciart11
Joined: 19 Apr 2011
Posts: 51
Location: Budapest
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| Posted: Sun Sep 25, 2011 9:25 am Post subject: |
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Hi barclay!
i did the following steps. the same error!
TDA 8172 8tf522 only suitable place for my 8ak309?
If it is IC12 then it's the Vertical Deflection for the blue tube. In this case I would do the following:
- Check or directly replace D23, D31 and D32
- Check or directly replace C53 and C55
- Make sure that the TDA8172 is of original quality (SGS Thomson/ST Micro etc.) and not a counterfeit part
- Make sure that the TDA is mounted correctly to the heatsink well isolated and with good thermal contact
You could do another test. The problem with this test is that it could kill You another TDA:
- If the cables are long enough, You could swap the blue deflection connector with the green one next to it.
- If this kills the TDA for green (IC13) the You have a short in the blue deflection coil and should get a replacement.
Although I've never seen a shorted deflection coil I wouldn't exclude it being possible.
Regards,
barclay66[/quote]
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barclay66
Joined: 27 Jun 2011
Posts: 1304
Location: Germany
TV/Projector: Marquee 9500 Ultra
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| Posted: Sun Sep 25, 2011 11:10 am Post subject: |
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| marciart11 wrote: |
TDA 8172 8tf522 only suitable place for my 8ak309? |
Sorry,
I don't understand what You mean with this.
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marciart11
Joined: 19 Apr 2011
Posts: 51
Location: Budapest
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| Posted: Sun Sep 25, 2011 3:54 pm Post subject: |
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The same problem:( , what next steps?
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Sun Sep 25, 2011 5:40 pm Post subject: |
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| marciart11 wrote: | | The same problem:( , what next steps? |
Send the board to Curt and have it repaired correctly. 
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barclay66
Joined: 27 Jun 2011
Posts: 1304
Location: Germany
TV/Projector: Marquee 9500 Ultra
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| Posted: Mon Sep 26, 2011 8:13 am Post subject: |
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| marciart11 wrote: |
TDA 8172 8tf522 only suitable place for my 8ak309? |
Sorry again,
I still do not understand what You mean with this.
I can't help You if You just quote my text without writing down what the individual results have been. It's even harder when You come up with strange information that even Google doesn't know of.
At this point You first will have to find out if the Vertical Defelection Board is going up in smoke just for itself or if there is an external reason for it. Maybe You should first get Yourself a known working Vertical Defelection Board before doing anything else. By this You could find out where the problem comes from...
Regards,
barclay66
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gjaky
Joined: 05 Jun 2010
Posts: 2802
Location: Budapest, Hungary
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| Posted: Mon Sep 26, 2011 11:39 am Post subject: |
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I join to this discussion, perhaps my english is a bit better, than Marci's... I discovered the misplugged deflection coil.
So from the starting: Marci has two Barco 808s one is a data, and the other is a graphics. The graphics is worked fine, and he bought the bd808 recently with a lot of spare boards, but the machine itself didn't work. He didn't find the problem with the machine, then I was involved too. Later I found that the blue deflection plug was shifted with one pin to the left, but for that time we already shot all of the vertical boards... We suspect that this was the main cause of the problem. Once before we knew about the shifted plug a V DEF board also blown but Marci was able to repair it just with the replace of the DEF ic, but this time it is not as easy. He has at least 3 vertical boards, but we don't know if the daughter boards are good or not as well.
| Quote: | | TDA 8172 8tf522 only suitable place for my 8ak309? |
I think he is only refers to the sub code written on the case of the ics
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barclay66
Joined: 27 Jun 2011
Posts: 1304
Location: Germany
TV/Projector: Marquee 9500 Ultra
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| Posted: Mon Sep 26, 2011 12:21 pm Post subject: |
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Hi gjaky,
Thank You for clearing that up. Usually the production codes aren't that significant (there are some known bad batches of other ICs which can be identified through the production codes but not in this case I think).
In this case not only the Vertical Deflection Board but the Horizontal Deflection Board and/or the Magnetic Focus & H-Shift Board could be damaged too as the pins for each are adjacent on the Deflection Connector. It might even be possible that the Vertical and/or Horizontal Deflection switches have been damaged because a deflection current ran across one of their closed contacts.
Umm, that could be a tricky one. In this case I first would take out all boards and closely inspect the Frame (from underneath too!) for damaged switches, burnt connectors and burnt traces. Then I would get a complete set of working modules and try with these...
Regards,
barclay66
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marciart11
Joined: 19 Apr 2011
Posts: 51
Location: Budapest
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| Posted: Tue Sep 27, 2011 4:33 pm Post subject: |
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Hi barclay66!
The deflection coil was not misconnected in the working projector, it was damaged in another projector. I do not understand why I should look for the error on the motherboard connection pin. The horizontal deflection board was not changed in the damaged projector, so I do not believe that this unit could be damaged. From my point of view only the vertical board is damaged in the working projector.
Is it possible that other parts on the vertical panel are damaged?
I have already checked the parts of the blue and green deflection output. What can be damaged? Is it possible that other ICs are damaged.
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barclay66
Joined: 27 Jun 2011
Posts: 1304
Location: Germany
TV/Projector: Marquee 9500 Ultra
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| Posted: Tue Sep 27, 2011 7:12 pm Post subject: |
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Hi,
If a TDA8172 fails it normally can only be the TDA itself, the surrounding discrete parts (diodes, resistors, capacitors etc.) or a short on its output. This is because all three TDAs receive the same supply and basically the same input signals. The best will be to get a known working board and see if this stays operational...
Regards,
barclay66
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