Re: Insignia NS-LCD42HD No Lights(R,B,G) & No Standby Power
Yes and also check the DC voltage across the bridge rectifier...
James Mandapati
Member
Last Activity: 08-09-2020, 05:29 AM
Joined: 09-13-2010
Location: Secunderabad, Telangana
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Re: sanyo dp26640 dead
Here is your old one
[url]https://www.badcaps.net/forum/showthread.php?t=34069[/url]Re: sanyo dp26640 dead<br /> <br />...?t=34069[/url]Leave a comment:
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Re: Sanyo LCD 42CA9S No Lights(R,B,G) & No Standby Power
Do the 2 voltage readings of the startup capacitors @ T602 mentioned by budm give any clue?
1) capacitor c1601 47mf/35v - 7.8 V DC
2) capacitor c1607 47mf/50v - 0.1 V DC (or might be zero too)
With No Lights(R,B,G) & No Standby Power, is the steady 340 V DC at bridge rectifier and filter capacitor the right voltage?...Last edited by James Mandapati; 12-30-2013, 11:38 PM.Leave a comment:
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Re: Sanyo LCD 42CA9S No Lights(R,B,G) & No Standby Power
Hello budm,
Uploaded pictures of the bottom side of the board which are not very clear.The schematic is available at
[url]http://elektrotanya.com/sanyo_lcd-32ca9,-37ca9,-42ca9_chassis_uh3-b.rar/download.html[/url]
on page 64
I do not have a hairdryer nor a capacitance meter to measure capacitance
However i did the following voltage checks (across the 2 electrolytic caps by T602)
1) power terminal - 240 v AC
2) input AC Voltage to the...Last edited by James Mandapati; 12-30-2013, 07:38 AM.Leave a comment:
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Re: Sanyo LCD 42CA9S No Lights(R,B,G) & No Standby Power
Checked 24VA, 5VA, 12V, 5VSTB and all of them read 0 volts
checked the voltages on all electrolytic capacitors (between the black colored heat sink and the connectors) by placing the red probe on the top of the capacitor and the voltages where les than a volt.
I read in this forum that 345 VDC on the mains filter capacitor is on the lower side. Any other points to look at?...Last edited by James Mandapati; 12-26-2013, 01:10 AM.Leave a comment:
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Re: Insignia NS-LCD42HD No Lights(R,B,G) & No Standby Power
Is this issue resolved?
In your video i see that you measured the voltage across the capacitor in AC range. Should it not be in DC range?Leave a comment:
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Re: Sanyo LCD 42CA9S No Lights(R,B,G) & No Standby Power
Hello Tom,
I should connect red probe to pin 9 (From attachment 2) and iam not clear on the chassis part Could you suggest any point on the power supply attachment? like the area where the screw fits
Other thoughts, in attachment2 are pin numbers 4,7,14 not ground? if so can i connect the black probe here?Last edited by James Mandapati; 12-24-2013, 03:51 AM.Leave a comment:
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Re: Sanyo LCD 42CA9S No Lights(R,B,G) & No Standby Power
Is it Ok if we remove all the connectors on the right side (see the power supply image)and troubleshoot?Leave a comment:
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Sanyo LCD 42CA9S No Lights(R,B,G) & No Standby Power
Symptoms:
The LCD TV was dead from October. However in between this period when we randomly tried switching on the TV it worked and continued to work normally till it was switched off and the next attempt you try switching on, it would not. The last time it worked was on 22 Dec 2013
Tests:
1) Checked power across the power terminal and its normal 250 v AC
2) Checked Voltage across the filter capacitor (big one) and its 345 v DC
BTW i measure voltage across the terminals say for measuring the voltage on the capacitor i placed the black lead on... -
Re: Insignia NS-LCD42HD No Lights(R,B,G) & No Standby Power
Hello Moderators,
I have a similar issue (Sanyo LCD 42CA9S) and iam not able to create a new thread.
Would like to create a new thread and post the details
ThanksLeave a comment:
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