Good day! Just found an older LCD in the dump (Sharp LC-32D40U) and plugged it in. I get backlighting (blue screen) but see no images or sound. When I press the Menu button (or any other buttons excepting PWR), I get no response. The service manual is accessible http://elektrotanya.com/sharp_lc-32d.../download.html but I am unsure as to where to start troubleshooting. Seems like a T-con issue perhaps? I removed the T-con and visual looked it over. 3A fuse was good and no burned items. Suggestions of what to troubleshoot would be appreciated.
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Re: Sharp Aquos LC-32D40U - no image
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Re: Sharp Aquos LC-32D40U - no image
Right! Snapping a few pics now.Comment
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Re: Sharp Aquos LC-32D40U - no image
Power supply, t-con, tuner and inverter. Scaler is on its way.Attached FilesComment
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Re: Sharp Aquos LC-32D40U - no image
Did you replace the caps with Panasonic caps or did you find it this way?--- begin sig file ---
If you are new to this forum, we can help a lot more if you please post clear focused pictures (max resolution 2000x2000 and 2MB) of your boards using the manage attachments button so they are hosted here. Information and picture clarity compositions should look like this post.
We respectfully ask that you make some time and effort to read some of the guides available for basic troubleshooting. After you have read through them, then ask clarification questions or report your findings.
Please do not post inline and offsite as they slow down the loading of pages.
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Re: Sharp Aquos LC-32D40U - no image
Found it as-is.Comment
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--- begin sig file ---
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Please do not post inline and offsite as they slow down the loading of pages.
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Re: Sharp Aquos LC-32D40U - no image
1) On the t-con board, check the VCC (5V) test point just by the F1 fuse.
2) Check to see if the voltages on the main board are okay.
3) I can't tell from the pictures, but see if the are any voltage regulators on the main board and see if they are within spec.--- begin sig file ---
If you are new to this forum, we can help a lot more if you please post clear focused pictures (max resolution 2000x2000 and 2MB) of your boards using the manage attachments button so they are hosted here. Information and picture clarity compositions should look like this post.
We respectfully ask that you make some time and effort to read some of the guides available for basic troubleshooting. After you have read through them, then ask clarification questions or report your findings.
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Re: Sharp Aquos LC-32D40U - no image
Did you try unplugging and reseatting the cables? Oddly with bad audio and video I used to always go for the main board until my last TV it was the TCON but I wouldn't even get backlights ... So you are at least getting a BLON signal I assume. Anyhow I wish I could help further but this would be the quickest fix I am aware of indeed do do power tests if reseatting cables does not aid... Wish you luck.Please note: I am not responsible for any harm caused to you anything discussed is just discussion. Before you try anything discussed be sure that you have the appropriate knowledge and safety gear for the job. Like with anything education and safety are first! Do not try anything @ home without it.Comment
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Re: Sharp Aquos LC-32D40U - no image
There's a few test points on the t-con that you should check the voltage on:
VCC+5V, VDD, VGL, VGH, SDRAM_VDD, VLS, 3V, SSC_VDD, D-VDD, and S_VDD(?)
Check with respect to ground. Let me know what voltages you get.Comment
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Re: Sharp Aquos LC-32D40U - no image
I have reseated the cables around the T-con and PS. No luck. Checking the voltages today.Comment
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Re: Sharp Aquos LC-32D40U - no image
Ok, the T-con board is under the main shell, separate from the major boards and very difficult to get to while cables are connected. I measure the 32 pins along the connector CP7203 which extends into the T-con board. This 32 pin cable is serviced by the scaler board. Voltages are below. Pins that show 0.0V (GND) are skipped.
1. -
2. - 5.32
3. - 5.32
4. - 5.32
5. - 5.32
10. - 0.0
13. - 1.43
14. - 1.17
16. - 1.42
17. - 1.06
19. - 1.38
20. - 1.12
22. - 1.22
23. - 1.27
25. - 1.42
26. - 1.08
29. - 3.27Comment
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Re: Sharp Aquos LC-32D40U - no image
CP506 coming directly off the main PS reads as follows:
1. 23.9 V
2. 23.9 V
3. 23.9 V
4. 23.9 V
5. 23.9 V
12. 3.3 V
13. 3.2 VComment
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Re: Sharp Aquos LC-32D40U - no image
CP3201 on scaler board which comes from the main board reads as follows:
1. 11.8
2. 8.8 V
3. 5.3 V
4. 3.4 V
5. 4.2 V
6. 4.2 V
10. 5.1 V
11. 5.0 VComment
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Re: Sharp Aquos LC-32D40U - no image
CP511 coming off main PS board read as follows:
1. 5.3
2. 5.3 V
3. 5.2 V
7. 11.9 V
8. 11.8 VComment
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Re: Sharp Aquos LC-32D40U - no image
CP510 coming off main PS read as follows:
1. 8.9 VComment
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Re: Sharp Aquos LC-32D40U - no image
So F1 fuse on the T-CON board is OK (since the 5Vdc feeding it from the cable is OK)?Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: Sharp Aquos LC-32D40U - no image
Both sides of F1 show 5 VDC.Comment
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Re: Sharp Aquos LC-32D40U - no image
Not to sound negative, but I doubt those voltages can be of much use in terms of troubleshooting. You really need to get the voltages at those test points I mentioned in order to see if the T-con is working properly.
I'm not very familiar with the layout of the TV, but if needed, use cardboard or plastic sheets to insulate the boards from each other and run the TV that way if you can to get those measurements.Comment
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Re: Sharp Aquos LC-32D40U - no image
Kinda working on too much here and just got back to this one. This evening I plugged a DVD player into the Component 1 jacks and got audio, but still no video. This tells me that the main board is OK, correct? Just need to spend my time looking at the T-con and scaler boards?Comment
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