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Crumbtrail TV Forums: TV Equipment: TV Repair Forum:
sony kv35s42 dead

 
 


bec137
New User

Oct 25, 2005, 2:19 AM

Post #1 of 15 (3508 views)
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sony kv35s42 dead Can't Post
need the values of Q601,Q602, AND R607.....Don't have a printout and I really want to get the set working again!!!



Thanks to all

Brian Chase



mel
Veteran

Oct 25, 2005, 10:37 PM

Post #2 of 15 (3495 views)
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Re: [bec137] sony kv35s42 dead [In reply to] Can't Post
Q601 and Q602 are 2SC4834N. R607 is a .1 ohm fusible resistor. Q591 (2SC4927) is probably bad too.


bec137
New User

Oct 26, 2005, 1:58 PM

Post #3 of 15 (3488 views)
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Re: [mel] sony kv35s42 dead [In reply to] Can't Post
Thanks, Mel.......I'm ordering the parts now.



Thanks again


Hect7369
User

Oct 26, 2005, 8:15 PM

Post #4 of 15 (3482 views)
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Re: [bec137] sony kv35s42 dead [In reply to] Can't Post
SmileDon't forget to resolder the whole board,specially horiz.oscillator coil!

If you don't do this, parts will go shorted again.



Hect.


bec137
New User

Oct 31, 2005, 1:40 AM

Post #5 of 15 (3464 views)
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Re: [Hect7369] sony kv35s42 dead [In reply to] Can't Post
replaced R607, Q502, IC601....Powered set up and SNAP!! R607 looks cracked.....help!!!!!


mel
Veteran

Nov 1, 2005, 12:01 AM

Post #6 of 15 (3454 views)
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Re: [bec137] sony kv35s42 dead [In reply to] Can't Post
R607 usually blows as the result of Q601 and/or Q602 being shorted. Q601/2 usually fail as the result of Q502 shorting out. You also need to check all of the diodes associated with Q601/2.


bec137
New User

Nov 1, 2005, 2:00 AM

Post #7 of 15 (3447 views)
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Re: [mel] sony kv35s42 dead [In reply to] Can't Post
Can't find Q601/602...do you mean Q501/502??


mel
Veteran

Nov 1, 2005, 8:46 PM

Post #8 of 15 (3441 views)
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Re: [bec137] sony kv35s42 dead [In reply to] Can't Post
Probably. I'm working off of the schematic that my conversion chart says is the same chassis. To be sure, I'd go to www.samswebsite.com and download Efact #4478. The three transistors in question are the converters in the power supply and the horizontal output transistor.


bec137
New User

Nov 1, 2005, 11:37 PM

Post #9 of 15 (3436 views)
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Re: [mel] sony kv35s42 dead [In reply to] Can't Post
Thanks......Do you thint i should order a flyback transformer also???


mel
Veteran

Nov 2, 2005, 12:12 AM

Post #10 of 15 (3435 views)
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Re: [bec137] sony kv35s42 dead [In reply to] Can't Post
Sony flybacks are usually pretty reliable so I don't think that is part of your problem.


bec137
New User

Nov 2, 2005, 2:06 AM

Post #11 of 15 (3434 views)
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Re: [mel] sony kv35s42 dead [In reply to] Can't Post
ordered all parts needed.........Thanks again for all your help and I'll keep you informed.



Brian


(This post was edited by bec137 on Nov 2, 2005, 2:14 AM)


bec137
New User

Nov 4, 2005, 8:03 PM

Post #12 of 15 (3421 views)
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Re: [bec137] sony kv35s42 dead [In reply to] Can't Post
Well.....Replaced all parts needed(IC601 Q621,Q502,R607,Q501) turned the set on and heard the picture tube go on but no picture,no sound. unplugged the set ck the PS (all OK) and pucture tube did the same thing.



Any ideas??

Brian


mel
Veteran

Nov 4, 2005, 11:29 PM

Post #13 of 15 (3417 views)
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Re: [bec137] sony kv35s42 dead [In reply to] Can't Post
Is the standby light blinking and it so, how many times?


bec137
New User

Nov 5, 2005, 12:11 AM

Post #14 of 15 (3417 views)
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Re: [mel] sony kv35s42 dead [In reply to] Can't Post
costantly...no flash code.. keep going


mel
Veteran

Nov 6, 2005, 1:17 AM

Post #15 of 15 (3410 views)
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Re: [bec137] sony kv35s42 dead [In reply to] Can't Post
The continuous blink along with the other symptoms indicates that the the data bus is probably shorted to ground. Check your work to make sure that you didn't form any solder bridges between circuits. Otherwise, the problem is probably so complex that you will need professionial hand on help.

 
 
 


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