| Invoke CRT repair technicians |
by halfgaar |
2008-04-28 07:28:57 |
Hello CRT repair technicians :)
I have a 19" Eizo T766 CRT here, which is acting up (with an intermittant fault). Especially when it's cold, the screen occasionally turns fully blue, including visible retrace lines of the vertical scan. When it does so, the image also collapses (like turning off an old TV) and the sometimes, the entire monitor turns itself off.
It would appear that there is a short between the blue cathode and ground, turning the gun fully on. I tried desoldering the blue cathode from the neck board; the problem remains, except now the image does not collapse, nor does the monitor turn itself off. This is probably because the output of the cathode driver chip (LM2413) is not shorted to ground this way.
Anyway, the solutions I found for a typical heater-cathode short are: put the monitor on it's face or side and tap the neck, or blow out the short by connecting a capacitor or some power supply between ground and cathode (with disconnected neck board of course). I'm rather apprehensive about the latter, and the former did not yield any results (yet).
I would appreciate any advice I can get. |
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[ Reply ] |
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I'm just downright impressed someone does this! (n/t) | by Myke | 2008-04-28 07:30:16 |
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See other post about CRTs | by halfgaar | 2008-04-28 07:55:12 |
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What about DLP? | by the_diggity | 2008-04-28 07:58:47 |
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I actually would like to wait for the OLED's to | by Classic_Jon | 2008-04-28 09:46:10 |
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Wish SED were here | by halfgaar | 2008-04-28 15:12:30 |
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I dunno if I can agree with that. | by Myke | 2008-04-28 14:32:00 |
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I dare to disagree | by halfgaar | 2008-04-28 15:41:45 |
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Chuck it and get a new monitor. | by RetiQlum2 | 2008-04-28 07:36:37 |
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Seconded. (n/t) | by Classic_Jon | 2008-04-28 07:47:11 |
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haha, chuck it....!? | by halfgaar | 2008-04-28 07:53:02 |
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Fixing a cracked trace is easy, that's true. | by RetiQlum2 | 2008-04-28 07:56:29 |
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What do you see as faults of TFT? | by desiredusername | 2008-04-28 08:10:05 |
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Haven't seen it in real life, no | by halfgaar | 2008-04-28 08:27:41 |
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snobbish much? | by Freakazoid | 2008-04-28 08:36:46 |
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That was uncalled for.. | by desiredusername | 2008-04-28 08:42:23 |
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You will have a hard time getting my | by Classic_Jon | 2008-04-28 08:52:49 |
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aah, had one of those | by langly | 2008-04-28 09:04:14 |
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When it goes out I will replace it with an LCD | by Classic_Jon | 2008-04-28 09:44:15 |
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One of the best tubes ever... | by Myke | 2008-04-28 14:40:58 |
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Words to live by | by halfgaar | 2008-04-28 08:59:48 |
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Life is a wandering path | by desiredusername | 2008-04-28 08:38:24 |
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I agree, but your CRT can't touch | by ooys | 2008-04-28 09:32:31 |
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True, but | by halfgaar | 2008-04-28 15:13:36 |
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That particular panel addresses a lot of those | by EndlessWaves | 2008-04-28 10:48:25 |
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If you have a CRT with ghosting then something | by Classic_Jon | 2008-04-28 11:00:11 |
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Or you have a lousy cable. (n/t) | by Myke | 2008-04-28 14:46:32 |
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Can't do much about that, it's fixed to the CRT | by EndlessWaves | 2008-04-28 18:04:57 |
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72 Mhz... | by halfgaar | 2008-04-28 15:15:19 |
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No, it's 72mhz. One refresh every 14 sec | by desiredusername | 2008-04-28 15:38:00 |
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was that an "interweb" moment? (n/t) | by flirkann | 2008-04-28 18:48:36 |
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What's IPS? (n/t) | by Myke | 2008-04-28 14:46:44 |
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Check this out | by desiredusername | 2008-04-28 15:36:22 |
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Short version: | by EndlessWaves | 2008-04-28 18:13:22 |
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Nice... | by flirkann | 2008-04-28 08:36:09 |
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I think that's the same as Dell UltraSharp 2707WFP | by desiredusername | 2008-04-28 08:45:47 |
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yeah, stats wise they're on par (n/t) | by flirkann | 2008-04-28 08:59:35 |
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No, I think it's the same panel | by desiredusername | 2008-04-28 09:23:34 |
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Even Wikipedia agrees with me | by halfgaar | 2008-04-28 08:31:52 |
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and..? wikipedia's hardly impartial | by Freakazoid | 2008-04-28 08:38:25 |
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I know, It was more or less meant ironically. (n/t | by halfgaar | 2008-04-28 08:57:56 |
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Heh.. I can't stand trinitrons.. | by desiredusername | 2008-04-28 08:47:14 |
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Very true, depends on personal preference :) (n/t) | by halfgaar | 2008-04-28 08:57:24 |
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Uh-huh... | by flirkann | 2008-04-28 07:54:31 |
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The best thing to do is | by lheggland | 2008-04-28 09:15:26 |
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don't know if that helps | by halfgaar | 2008-04-28 15:21:55 |
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Ah, isolation transformer | by halfgaar | 2008-04-28 16:03:08 |
