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Old 7th January 2012, 11:47 AM   #691
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Quote:
Originally Posted by Jempie View Post
Finally the volume control work thanks to Farmtech.
only the LM1117DT-5.0 gettig hot after 5 min the display goes down.
I think you draw to muts current via LM1117DT-5.0
Or your input Volt is to high

can you post the sch or send it via email
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Old 7th January 2012, 12:06 PM   #692
Jempie is offline Jempie  Indonesia
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http://www.vicol-audio.ro/img/volume...d_20101406.pdf
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Old 7th January 2012, 12:11 PM   #693
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Originally Posted by Jempie View Post
ok backlight maybe to high
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Old 7th January 2012, 01:45 PM   #694
Jempie is offline Jempie  Indonesia
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Framtech, voltage 4,65 volt
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Old 7th January 2012, 02:53 PM   #695
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I think Farmtech mean not voltage but cuurent for LCD backlight. Add resistor 100-470 to Pin A or K. Or try omit Q7 or R10 first to check.
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Old 7th January 2012, 02:58 PM   #696
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Quote:
Originally Posted by Jempie View Post
Framtech, voltage 4,65 volt
what trafo supply volt (AC) do you have and mA ?

can you messure volt before LM1117DT-5.0 and after (4,65 volt)

did you check board for soilder errors ?

@ didiet78 : sorry yes of cause it was current i mean
some backlight use alot of current if setup is wrong and then LM1117DT is working to hard

Last edited by FarmTech; 7th January 2012 at 03:01 PM.
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Old 8th January 2012, 09:27 AM   #697
Jempie is offline Jempie  Indonesia
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FarmTech, yes i have check more then 10 times the components
there is no difference between schematic and board.

i use winstar WH1602L-TMI-ET display with no resistors on A-K for the blacklight
i use 14 V AC is this to high?
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Old 8th January 2012, 10:12 AM   #698
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Quote:
Originally Posted by Jempie View Post
FarmTech, yes i have check more then 10 times the components
there is no difference between schematic and board.

i use winstar WH1602L-TMI-ET display with no resistors on A-K for the blacklight
i use 14 V AC is this to high?
Well
14VAC = about 20Vdc
9VAC = about 12VDC

try a lower VAC I think thats why you have heating problems
see datasheet Page 4 Output Voltage
it show max 12VDC for high current use

Last edited by FarmTech; 8th January 2012 at 10:20 AM. Reason: added link
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Old 10th January 2012, 03:21 AM   #699
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Danzup, in post Yet another Volume controlers and source selections can i just change PGA2310 with PGA2311 and change analog supply with +/-5V without change the HEX file?

Didiet
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Old 10th January 2012, 06:00 AM   #700
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Quote:
Originally Posted by Jempie View Post
FarmTech, yes i have check more then 10 times the components
there is no difference between schematic and board.

i use winstar WH1602L-TMI-ET display with no resistors on A-K for the blacklight
i use 14 V AC is this to high?
Jempie,

LM1117DT is a low drop regulator. Use a trafo with min 6V ac - max 9V ac.

Regards,
Tibi
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