I have this tv, that will not power on, and has no backlight. I have no readings on the main cap, which is 400v. Any help would be appreciated before I buy another board from shop jimmy.
Attached Files
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Last edited by junkmale172; 05-13-2015, 05:58 AM. -
Re: Westinghouse 32h640g
Pictures of your boards please and overall layout.
How did you test the cap?
Fuses ok? -
Re: Westinghouse 32h640g
Fuses checked out fine, had meter set on dc negative lead to negative to cap and positive lead to positive to capAttached FilesLast edited by junkmale172; 05-13-2015, 06:01 AM.Comment
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Re: Westinghouse 32h640g
Need picture of topside of PSU too pleaseComment
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Re: Westinghouse 32h640g
Could you either get us a pic(s) of the two connectors on the right hand side of that image, or tell us what pins are labeled what? (Hopefully they are, looks like they might be, but I can't tell)
Edit: WHOOPS, I read your first post as "the main cap has 400V on it", but after I posted I saw you said that it doesn't have any voltage on it, but it is rated for 400V. I must not be awake yet
See that green thing below R101? (left hand side of the image)
Test that to see if it is open circuit.
Also, test D601 to see if it is bad.
-BenLast edited by ben7; 05-13-2015, 07:18 AM.Muh-soggy-kneeComment
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Re: Westinghouse 32h640g
Ben beat me to it with testing D601.
Can you just confirm you have voltage at either side of the main fuse?Comment
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Re: Westinghouse 32h640g
Will update later, had to step away thanks for help so far. I had power supply outside of tv with no load on it, once I plugged power supply into sencore variac turned voltage to 80v I got 160v on big cap, I will plug power supply into set later and update.Comment
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Re: Westinghouse 32h640g
Please also show the closed up pictures of the connectors so can see the labels for each pin of the connectors.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: Westinghouse 32h640g
LAttached FilesComment
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Re: Westinghouse 32h640g
ConnectorAttached FilesComment
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Re: Westinghouse 32h640g
OK, thanks for the pictures.
Please take the DCV readings of all the pins when the TV is plugged in and when power switch is activated.
Please list all pin names and the readings of each to make it easy for to see what are missing.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: Westinghouse 32h640g
ok update, put power supply in tv, and standby light comes on. Starts off amber, then when I press power it turns blue (yeah), now I have no picture on the screen, upgrade from where I started. These are the outputs from the connectors
plugged in amber light
acd 3.40
p_on .009
+5v 1. 4.99
2. 4.99
3. 4.99
+12v 1. 0v
2. 0v
3. 0v
bl .007
bri .001
pwm .001
power on
acd 3.40
p_on 2.844
+5v 1. 4.99
2. 4.99
3. 4.99
+12v 1. .492
2. .492
3. .492
bl 4.91
bri 3.232
pwm .004
this is the connector going to main boardComment
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Re: Westinghouse 32h640g
next is connector going to panel
amber light on
bl .007
bri .008
pwm 0
+24v 1. 0
2. 0
3. 0
4. 0
blue light unit switched on
bl 4.91
bri 3.232
pwm .004
+24v 1. .007
2. .007
3. .007
4. .007Comment
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Re: Westinghouse 32h640g
So you are not getting the 12V on connector P201 ro 24VDC on connector P202?
OK, you updated the readings, so we do not have 12V or 24v.
Do you have >360VDC measure between the two legs of the main 450V filter cap?Attached FilesLast edited by budm; 05-13-2015, 04:10 PM.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: Westinghouse 32h640g
167vdc is what i get between the main cap it is 400vComment
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Re: Westinghouse 32h640g
That is measured with TV turned on? The booster circuit is turned on by the PS-ON which will make the Voltage on the cap jumps up from 160VDC to >360VDC if the PFC Voltage booster is working.
The booster circuit has to function for the 12V-24v POWER SUPPLY SECTION to work.Last edited by budm; 05-13-2015, 04:14 PM.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: Westinghouse 32h640g
yes that is with the tv on.Comment
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Re: Westinghouse 32h640g
OK, so we need to find out what is wrong with the PFC section first.
So check the PFC Diodes D601, D602 to see if they are OK or not first.
We need the P/N of the PFC IC.Attached FilesLast edited by budm; 05-13-2015, 04:24 PM.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: Westinghouse 32h640g
ok i have a fluke 73 3multimeter what do i need to set it on?Comment
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Re: Westinghouse 32h640g
they read .463vComment
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